# 🏥 Adult Health Nursing I (Medical Surgical Nursing)
## B.Sc. Nursing – Semester III | Complete Exam Notes
### Easy Language | Topic-wise | For Quick Revision

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> **How to use these notes:** Each topic follows the same pattern:
> Definition → Causes → Signs & Symptoms → Investigations → Nursing Management → Exam Points → Quick Revision

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# UNIT 1: INTRODUCTION TO MEDICAL SURGICAL NURSING

## 1.1 Medical Surgical Nursing – Definition

**Definition:** Medical Surgical Nursing is a branch of nursing that focuses on caring for adult patients who are medically ill or recovering from surgery. It includes assessment, planning, and delivery of care in hospital settings.

### Care Settings:
| Setting | Description |
|---------|-------------|
| **OPD** | Outpatient Department – short visits, no admission |
| **In-patient/Ward** | General wards, moderate-to-long stay |
| **ICU** | Intensive Care Unit – critically ill, continuous monitoring |

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## 1.2 Wound Healing

**Definition:** Wound healing is the body's natural process of repairing damaged tissue.

### 4 Stages of Wound Healing:
1. **Hemostasis** – Blood clotting stops bleeding (platelets + fibrin clot)
2. **Inflammation** – Signs: Redness, Heat, Pain, Swelling (RHPS) – cleans the wound
3. **Proliferation** – New tissue (granulation tissue) forms
4. **Remodeling** – Scar tissue matures and strengthens

### Signs of Inflammation (SPHEP):
- **S**welling
- **P**ain
- **H**eat
- **E**rythema (Redness)
- **P**uss (in infection)

### ⭐ Exam Point:
> Wound healing stages: **H-I-P-R** (Hemostasis → Inflammation → Proliferation → Remodeling)

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# UNIT 2: PERIOPERATIVE & INTRAOPERATIVE CARE

## 2.1 Perioperative Care

**Definition:** Perioperative care is the total nursing care given to a patient BEFORE (pre-op), DURING (intra-op), and AFTER (post-op) surgery.

### 3 Phases:
1. **Pre-operative** – Preparation before surgery
2. **Intra-operative** – During surgery (in the OT)
3. **Post-operative** – Recovery after surgery

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## 2.2 Operating Theater (OT) Team

| Role | Responsibilities |
|------|-----------------|
| **Scrub Nurse** | Handles sterile instruments, assists surgeon, maintains sterile field |
| **Circulating Nurse** | Manages non-sterile area, documentation, coordinates with outside |
| **Anesthesiologist** | Gives anesthesia, monitors vitals |
| **Surgeon** | Performs the operation |

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## 2.3 Types of Anesthesia

| Type | Meaning | Example |
|------|---------|---------|
| **General** | Full unconsciousness | Major surgeries |
| **Regional** | Block to a region | Epidural, brachial plexus block |
| **Spinal** | Lower body block via spinal canal | C-section, hip surgery |
| **Local** | Small area numbed | Minor cuts, dental |

### Stages of General Anesthesia:
1. **Stage I** – Analgesia (patient conscious but pain reduced)
2. **Stage II** – Excitement (irregular breathing, vomiting risk)
3. **Stage III** – Surgical anesthesia (safe stage for surgery)
4. **Stage IV** – Medullary depression (DANGER – respiratory failure)

---

## 2.4 Pre-operative Nursing Care

### Checklist Before Surgery:
- ✅ Consent form signed
- ✅ NPO (Nothing by mouth) – 6–8 hours before
- ✅ Skin preparation (shaving, cleaning)
- ✅ IV line established
- ✅ Jewelry/dentures removed
- ✅ Baseline vitals recorded
- ✅ Pre-medication given (sedative/antacid)
- ✅ Surgical safety checklist verified

### ⭐ Exam Point:
> "Sign In – Time Out – Sign Out" = WHO Surgical Safety Checklist (3 steps)

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## 2.5 Post-operative Nursing Care

### Immediate Post-op (Recovery Room/PACU):
- Monitor airway, breathing, circulation (ABC)
- Check level of consciousness
- Monitor vitals every 15 minutes
- Check wound dressing and drainage
- Pain management

### Common Post-op Complications:
| Complication | Nursing Action |
|---|---|
| Bleeding/Hemorrhage | Apply pressure, notify doctor |
| Wound infection | Sterile dressing change |
| Deep Vein Thrombosis (DVT) | Leg exercises, compression stockings |
| Atelectasis (lung collapse) | Deep breathing, coughing exercises |
| Urinary retention | Catheterization if needed |
| Nausea/Vomiting | Anti-emetics, position on side |

### ⭐ Quick Revision:
> Post-op ABC = **Airway, Breathing, Circulation**
> Most common post-op complication = **Wound infection**
> Most dangerous = **Hemorrhage**

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# UNIT 3: RESPIRATORY SYSTEM

## 3.1 COPD (Chronic Obstructive Pulmonary Disease)

### Definition:
COPD is a chronic lung disease with **persistent airflow limitation** that is not fully reversible. It includes **Chronic Bronchitis** and **Emphysema**.

### Causes:
- **#1 Cause:** Cigarette smoking (most common)
- Air pollution
- Occupational dust/chemicals
- Recurrent respiratory infections
- Alpha-1 antitrypsin deficiency (genetic)

### Signs & Symptoms:
| Symptom | Explanation |
|---------|-------------|
| **Chronic cough** | Productive cough for 3+ months/2 years |
| **Sputum** | Excessive mucus production |
| **Dyspnea** | Difficulty breathing on exertion |
| **Barrel chest** | Increased AP diameter due to air trapping |
| **Pursed lip breathing** | Patient naturally adapts to keep airways open |
| **Use of accessory muscles** | Neck/shoulder muscles used to breathe |
| **Cyanosis** | Blue color of lips/fingertips (late sign) |
| **Cor Pulmonale** | Right heart failure due to lung disease |

### Investigations:
- **Spirometry (PFT)** – Gold standard; FEV1/FVC < 0.70 confirms COPD
- **Chest X-ray** – Hyperinflation, flattened diaphragm
- **ABG (Arterial Blood Gas)** – Low O2 (hypoxemia), High CO2 (hypercapnia)
- **CBC** – Polycythemia (increased RBCs due to chronic hypoxia)
- **Sputum culture** – To identify infection

### Nursing Management:
1. **Positioning** – High Fowler's position (sit up 45–90°) for easy breathing
2. **Oxygen therapy** – LOW FLOW O2 (1–2 L/min via nasal cannula)
   > ⚠️ **Important:** Give LOW O2 in COPD – high O2 removes the hypoxic drive and can cause respiratory arrest!
3. **Breathing exercises** – Pursed lip breathing, diaphragmatic breathing
4. **Bronchodilator therapy** – Salbutamol (SABA), Tiotropium (LAMA)
5. **Chest physiotherapy** – Postural drainage, percussion
6. **Monitor vitals** – Especially SPO2 (maintain 88–92%)
7. **Fluids** – Adequate hydration to loosen secretions
8. **Smoking cessation** – Most important intervention!
9. **Pulmonary rehabilitation** – Exercise training, education

### ⭐ Exam Points:
> - COPD = FEV1/FVC < 0.70
> - Low flow O2 in COPD (1–2 L/min)
> - Barrel chest = Emphysema
> - "Pink Puffer" = Emphysema | "Blue Bloater" = Chronic Bronchitis

### 🔖 Quick Revision:
> COPD causes: **SOAP** – Smoking, Occupational exposure, Air pollution, Pollution (indoor)

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## 3.2 ARDS (Acute Respiratory Distress Syndrome)

### Definition:
ARDS is a sudden, severe lung condition where the lungs fill with fluid, making it difficult to breathe. It is life-threatening and requires ICU care.

### Causes:
**Direct (Pulmonary):**
- Pneumonia (most common)
- Aspiration of gastric contents
- Lung trauma/contusion

**Indirect (Non-pulmonary):**
- Sepsis (most common overall)
- Severe trauma/burns
- Pancreatitis
- Blood transfusion (TRALI)
- Drug overdose

### Signs & Symptoms:
- **Severe dyspnea** – onset within 12–48 hours of trigger
- **Rapid breathing** (tachypnea > 30/min)
- **Low SpO2** despite high O2 (refractory hypoxemia)
- **Bilateral crackles** on auscultation
- **Cyanosis**
- **Agitation, confusion** (hypoxia to brain)
- **Bilateral ground glass opacities** on CXR

### Berlin Criteria for ARDS:
| Severity | PaO2/FiO2 Ratio |
|----------|-----------------|
| Mild | 200–300 mmHg |
| Moderate | 100–200 mmHg |
| Severe | < 100 mmHg |

### Investigations:
- **ABG** – PaO2/FiO2 ratio < 300
- **Chest X-ray** – Bilateral "white-out" / bilateral infiltrates
- **CT chest** – Ground glass opacities
- **Blood cultures, CBC** – To find underlying cause
- **Wedge pressure (PCWP)** – < 18 mmHg (rules out cardiac cause)

### Nursing Management:
1. **Mechanical ventilation** – Low tidal volume ventilation (4–6 mL/kg) – "Lung protective"
2. **Prone positioning** – Turn patient face-down to improve oxygenation
3. **PEEP** – Positive End Expiratory Pressure to keep alveoli open
4. **High FiO2** – High concentration O2 (opposite of COPD!)
5. **Fluid management** – Restrict fluids to avoid worsening pulmonary edema
6. **Monitor ABG** – Continuous pulse oximetry
7. **Suctioning** – To clear secretions
8. **Prevention of complications** – DVT prophylaxis, pressure sore prevention
9. **Nutritional support** – Early enteral feeding

### ⭐ Exam Points:
> - ARDS hallmark = **Refractory Hypoxemia** (O2 does not improve despite high flow)
> - CXR = **Bilateral white-out / ground glass opacities**
> - Management = **Low tidal volume + PEEP + Prone positioning**
> - Most common cause = **Sepsis**

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## 3.3 Pneumonia

### Definition:
Pneumonia is an **infection of the lung parenchyma** (air sacs/alveoli) causing inflammation and fluid/pus accumulation.

### Types:
- **CAP** – Community Acquired Pneumonia (at home)
- **HAP** – Hospital Acquired Pneumonia (after 48 hrs in hospital)
- **VAP** – Ventilator Associated Pneumonia (on mechanical ventilator)

### Causes:
- **Bacteria:** Streptococcus pneumoniae (most common), Klebsiella, Staphylococcus
- **Virus:** Influenza, COVID-19
- **Fungi:** Aspergillus (immunocompromised)
- **Atypical:** Mycoplasma pneumoniae

### Signs & Symptoms:
- **Fever** (high-grade, with chills)
- **Productive cough** – rusty/yellow sputum
- **Chest pain** – pleuritic (worse on breathing)
- **Dyspnea**
- **Tachycardia**, tachypnea
- **Consolidation signs** – dullness on percussion, bronchial breath sounds, increased vocal resonance

### Investigations:
- **Chest X-ray** – **Consolidation** (white patch in one lobe/segment)
- **CBC** – Elevated WBC (leukocytosis) in bacterial pneumonia
- **Sputum culture** – To identify organism
- **ABG** – Hypoxia in severe cases
- **Blood culture** – In severe/bacteremic pneumonia

### Nursing Management:
1. **Rest and positioning** – High Fowler's, affected side down (if pleural effusion)
2. **Oxygen therapy** – Maintain SpO2 > 94%
3. **Antibiotics** – As per culture (Amoxicillin/Azithromycin for CAP)
4. **Adequate hydration** – 2–3 L/day to thin secretions
5. **Deep breathing exercises** – Incentive spirometer use
6. **Chest physiotherapy** – Percussion and postural drainage
7. **Monitor vitals** – Temperature, RR, SpO2
8. **Antipyretics** – For fever (Paracetamol)
9. **Isolation** – If TB or highly infectious pneumonia

### ⭐ Exam Points:
> - CXR finding = **Consolidation**
> - Most common organism = **Streptococcus pneumoniae**
> - Rusty sputum = **Pneumococcal pneumonia**
> - Prevention = **Pneumococcal vaccine, Influenza vaccine**

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## 3.4 Tuberculosis (TB)

### Definition:
TB is a **chronic infectious disease** caused by Mycobacterium tuberculosis, primarily affecting the lungs (pulmonary TB).

### Causes:
- **Organism:** Mycobacterium tuberculosis (acid-fast bacillus)
- **Transmission:** Airborne droplet nuclei (coughing, sneezing)
- **Risk Factors:** HIV, malnutrition, overcrowding, diabetes, immunosuppression

### Signs & Symptoms:
| Classic TB Symptoms | Other symptoms |
|--------------------|-|
| Persistent cough > 2 weeks | Weight loss |
| Blood-tinged sputum (hemoptysis) | Night sweats |
| Fever (low-grade, evening) | Fatigue/weakness |
| Chest pain | Loss of appetite |

### Investigations:
- **Sputum AFB smear** – Ziehl-Neelsen stain (most common initial test)
- **Sputum culture** – Gold standard (but takes 6–8 weeks)
- **CBNAAT/GeneXpert** – Rapid molecular test (detects TB + drug resistance)
- **Chest X-ray** – Upper lobe cavities, fibrosis
- **Mantoux test (TST)** – Tuberculin skin test (induration ≥ 10mm = positive)
- **IGRA** – Interferon Gamma Release Assay (blood test)
- **CBC** – Mild anemia, lymphocytosis

### Treatment (DOTS – Directly Observed Therapy, Short Course):
| Phase | Duration | Drugs |
|-------|----------|-------|
| **Intensive phase** | 2 months | HRZE (Isoniazid + Rifampicin + Pyrazinamide + Ethambutol) |
| **Continuation phase** | 4 months | HR (Isoniazid + Rifampicin) |

### Nursing Management:
1. **Isolation** – Airborne precautions; negative pressure room; N95 mask
2. **DOTS supervision** – Watch patient swallow every dose
3. **Medication compliance** – Emphasize completing 6-month course
4. **Nutrition** – High protein, high calorie diet
5. **Infection control** – Teach cough etiquette, cover mouth/nose
6. **Monitor side effects:**
   - Isoniazid → Peripheral neuropathy (give Vit B6/Pyridoxine)
   - Rifampicin → Orange-colored urine (normal, not harmful)
   - Pyrazinamide → Hyperuricemia, joint pain
   - Ethambutol → Optic neuritis (vision changes)
7. **Contact tracing** – Screen family members
8. **Health education** – Ventilation, avoid crowding

### ⭐ Exam Points:
> - TB organism = **Mycobacterium tuberculosis** (AFB)
> - Transmission = **Airborne (droplet nuclei)**
> - DOTS = **6-month regimen** (2HRZE + 4HR)
> - Isolation = **Airborne precautions + N95 mask**
> - Rifampicin side effect = **Orange urine** (normal)
> - Isoniazid side effect = **Peripheral neuropathy** → give Pyridoxine (B6)

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## 3.5 Lung Abscess

### Definition:
Lung abscess is a **localized collection of pus** within the lung parenchyma, resulting in cavity formation.

### Causes:
- Aspiration of oral/gastric secretions (most common)
- Pneumonia (Klebsiella, Staph)
- Bronchial obstruction (tumor, foreign body)

### Signs & Symptoms:
- High-grade fever with chills
- Foul-smelling, copious purulent sputum
- Chest pain
- Dyspnea
- Hemoptysis

### Investigations:
- Chest X-ray – **Cavity with air-fluid level**
- CT chest – Best to delineate abscess
- Sputum culture and sensitivity

### Nursing Management:
1. Antibiotics (IV Penicillin/Clindamycin)
2. **Postural drainage** – Position head lower than chest to drain pus
3. Deep breathing and coughing exercises
4. Adequate hydration
5. High nutrition diet
6. Monitor sputum quantity and character

### ⭐ Exam Points:
> - CXR = **Cavity with air-fluid level**
> - Key nursing intervention = **Postural drainage**

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# UNIT 4: GASTROINTESTINAL SYSTEM

## 4.1 Peptic Ulcer Disease (PUD)

### Definition:
Peptic ulcer is a **break in the mucosal lining** of the stomach (gastric ulcer) or first part of the duodenum (duodenal ulcer), caused by imbalance between acid and mucosal protection.

### Causes:
1. **H. pylori infection** (most common – 70% of cases)
2. **NSAIDs** (Aspirin, Ibuprofen) – reduce prostaglandins → less mucus
3. Excessive acid secretion
4. Smoking (impairs mucosal healing)
5. Stress (Curling ulcer – burns; Cushing ulcer – brain injury)
6. Zollinger-Ellison syndrome (gastrin-producing tumor → massive acid)

### Signs & Symptoms:
| Gastric Ulcer | Duodenal Ulcer |
|---|---|
| Pain **during** eating | Pain **2–3 hours after** eating |
| Food worsens pain | Food relieves pain |
| Weight loss common | Weight gain possible |
| Less common | More common |

### Complications:
- **Bleeding** – Hematemesis (blood vomiting), Melena (black stool)
- **Perforation** – Sudden severe "board-like" abdominal rigidity → surgical emergency
- **Pyloric obstruction** – Vomiting, weight loss
- **Malignancy** – Gastric ulcer rarely turns cancerous

### Investigations:
- **Endoscopy (OGD)** – Gold standard; direct visualization of ulcer
- **H. pylori test** – Urea breath test (non-invasive), Biopsy (invasive)
- **Barium meal** – Shows "ulcer crater"
- **CBC** – Anemia if bleeding
- **Stool occult blood** – Positive

### Treatment:
| Drug | Purpose |
|------|---------|
| **PPI** (Omeprazole) | Reduce acid – first line |
| **H2 blockers** (Ranitidine) | Reduce acid |
| **Antacids** (Mg(OH)2) | Neutralize acid |
| **H. pylori triple therapy** | Omeprazole + Amoxicillin + Clarithromycin (2 weeks) |
| **Sucralfate** | Coats ulcer, acts as barrier |

### Nursing Management:
1. **Diet** – Small, frequent meals; avoid spicy/fatty food, caffeine, alcohol
2. **Medications** – Give PPI 30 min before meals
3. **Monitor for complications** – Watch for hematemesis, melena, sudden severe pain
4. **Avoid NSAIDs** – Educate patient
5. **Stress management** – Relaxation techniques
6. **Smoking cessation**
7. **H. pylori treatment compliance** – Complete full course
8. **Nasogastric tube** – If vomiting/obstruction

### ⭐ Exam Points:
> - Most common cause = **H. pylori**
> - Duodenal ulcer – pain relieved by food; Gastric ulcer – pain worsened by food
> - H. pylori triple therapy = **OAC** (Omeprazole + Amoxicillin + Clarithromycin)
> - Perforation = **Surgical emergency** (board-like rigid abdomen)

---

## 4.2 GI Bleeding

### Definition:
GI bleeding is blood loss from any part of the gastrointestinal tract.

### Types:
| Upper GI Bleed | Lower GI Bleed |
|---|---|
| Above ligament of Treitz | Below ligament of Treitz |
| Peptic ulcer, varices, gastritis | Diverticular disease, colorectal cancer, hemorrhoids |
| **Hematemesis** (blood vomit) | **Hematochezia** (fresh blood in stool) |
| **Melena** (black tarry stool) | - |

### Nursing Management – GI Bleed:
1. **IV access** – Large bore cannula (2 IVs) immediately
2. **IV fluids** – Normal saline to maintain BP
3. **Blood transfusion** – If Hb < 7 g/dL
4. **Monitor vitals** – BP, pulse (tachycardia = early sign of shock)
5. **NPO** – Nothing by mouth
6. **NG tube** – Gastric lavage in upper GI bleed
7. **Prepare for endoscopy** – For diagnosis and treatment
8. **Medications** – IV PPI (Pantoprazole), Octreotide (for varices)
9. **Monitor urine output** – Foley catheter (>0.5 mL/kg/hr = adequate)

### ⭐ Exam Points:
> - Upper GI bleed signs = **Hematemesis + Melena**
> - Immediate nursing = **IV access + Fluids + Monitor vitals**

---

## 4.3 Liver Cirrhosis

### Definition:
Cirrhosis is **irreversible scarring (fibrosis) of the liver** with loss of normal liver architecture, causing liver failure.

### Causes:
- Chronic alcohol use (most common in developing countries)
- Chronic Hepatitis B and C (most common worldwide)
- Non-alcoholic fatty liver disease (NAFLD)
- Autoimmune hepatitis
- Biliary cirrhosis

### Signs & Symptoms:
| Early | Late |
|-------|------|
| Fatigue, weakness | Jaundice |
| Loss of appetite | Ascites (fluid in abdomen) |
| Nausea | Edema (legs) |
| - | Splenomegaly |
| - | Spider angiomas on skin |
| - | Caput medusae (dilated veins on abdomen) |
| - | Gynecomastia (in males) |
| - | Hepatic encephalopathy (confusion) |
| - | Bleeding (low clotting factors) |

### Complications:
1. **Ascites** – Fluid in peritoneal cavity
2. **Variceal bleeding** – Esophageal varices rupture → massive bleed
3. **Hepatic Encephalopathy** – Brain dysfunction due to toxins
4. **Hepatorenal Syndrome** – Kidney failure in liver disease
5. **Hepatocellular Carcinoma (HCC)** – Liver cancer

### Investigations:
- **LFT** – Elevated bilirubin, low albumin, elevated enzymes (AST, ALT)
- **PT/INR** – Prolonged (liver cannot make clotting factors)
- **CBC** – Low platelets (thrombocytopenia), anemia
- **Ultrasound abdomen** – Nodular liver, ascites
- **Liver biopsy** – Gold standard for diagnosis and staging
- **Endoscopy** – Check for esophageal varices

### Nursing Management:
1. **Rest** – Bed rest during acute phase
2. **Diet:**
   - Low sodium (restrict salt) – reduces ascites
   - Adequate protein (0.8–1 g/kg) unless encephalopathy
   - Restrict protein if encephalopathy (to reduce ammonia)
3. **Fluid monitoring** – Daily weight, abdominal girth measurement
4. **Medications:**
   - Diuretics (Spironolactone + Furosemide) for ascites
   - Lactulose – reduces ammonia in encephalopathy
   - Beta-blockers (Propranolol) – prevent variceal bleeding
5. **Paracentesis** – Drain ascitic fluid (assist physician)
6. **Avoid alcohol completely**
7. **Monitor for bleeding** – Check stool color, hematemesis
8. **Skin care** – Pruritus (itching) management; avoid scratching
9. **Safety** – Confusion/encephalopathy → side rails up

### ⭐ Exam Points:
> - Cirrhosis irreversible → treatment is **management of complications**
> - Lactulose = for **hepatic encephalopathy** (traps ammonia)
> - Low sodium diet = for **ascites**
> - Caput medusae = **dilated abdominal veins** (sign of portal hypertension)

---

## 4.4 Hepatitis

### Definition:
Hepatitis is **inflammation of the liver** caused by viruses, alcohol, drugs, or immune reactions.

### Types of Viral Hepatitis:
| Feature | Hep A | Hep B | Hep C | Hep D | Hep E |
|---------|-------|-------|-------|-------|-------|
| **Transmission** | Feco-oral | Blood/sexual | Blood | Blood (with B) | Feco-oral |
| **Chronic?** | No | Yes (10%) | Yes (85%) | Yes (with B) | No |
| **Vaccine** | Yes | Yes | No | Hep B vaccine protects | No |
| **Risk of cancer** | No | High | High | High | No |

### Signs & Symptoms (All types):
- **Pre-icteric phase:** Fatigue, nausea, vomiting, fever, loss of appetite
- **Icteric phase:** **Jaundice** (yellow skin/eyes), **dark urine** (tea-colored), **pale stool**
- **Recovery phase:** Gradual improvement

### Investigations:
- **LFT** – Elevated AST, ALT (in 100s–1000s in acute hepatitis)
- **Serology** – HBsAg (Hep B antigen), Anti-HCV antibody
- **Viral load (PCR)** – Hepatitis B viral DNA, HCV RNA
- **Bilirubin** – Elevated (both direct and indirect)
- **PT** – Prolonged in severe hepatitis

### Nursing Management:
1. **Rest** – Bed rest in acute phase
2. **Nutrition** – High carbohydrate, adequate protein diet; small frequent meals
3. **Hydration** – Adequate oral fluids; IV if vomiting
4. **Isolation precautions:**
   - Hep A/E: Enteric (contact) precautions
   - Hep B/C/D: Standard precautions (blood/body fluid precautions)
5. **Medications** – Antivirals (Tenofovir/Entecavir for Hep B; DAAs for Hep C)
6. **Alcohol avoidance** – Absolute
7. **Monitor LFT** – Regular checks
8. **Vaccination education** – Hep A and B vaccines available
9. **Health education** – Safe sex, no needle sharing, safe blood

### ⭐ Exam Points:
> - Hep A = Feco-oral; **Hep B = Blood/sexual (most important in nursing)**
> - HBsAg = current infection | Anti-HBs = immunity
> - "Tea-colored urine + pale stool + jaundice" = **Hepatitis/Obstructive jaundice**
> - Most chronic = **Hep C (85%)**

---

## 4.5 Pancreatitis

### Definition:
Pancreatitis is **inflammation of the pancreas** due to premature activation of pancreatic enzymes inside the gland.

### Causes:
- **GET SMASHED** (mnemonic):
  - **G**allstones (most common)
  - **E**thanol/alcohol (2nd most common)
  - **T**rauma
  - **S**teroids
  - **M**umps (and other infections)
  - **A**utoimmune
  - **S**corpion sting
  - **H**yperlipidemia / Hypercalcemia
  - **E**RCP (procedure complication)
  - **D**rugs (Azathioprine, Thiazides)

### Signs & Symptoms:
- **Severe epigastric pain** – sudden onset, radiates to back ("boring" pain)
- Pain relieved by leaning forward (knee-chest position)
- Nausea, vomiting
- Fever
- Tachycardia
- Abdominal distension, reduced bowel sounds
- **Cullen's sign** – Bruising around navel (hemorrhagic pancreatitis)
- **Grey-Turner's sign** – Bruising on flanks (hemorrhagic pancreatitis)

### Investigations:
- **Serum amylase** – Elevated (> 3× normal) – rises quickly but falls fast
- **Serum lipase** – More specific; elevated > 3× normal (stays elevated longer)
- **Ultrasound** – Gallstones, edematous pancreas
- **CT scan abdomen** – Gold standard for severity (Balthazar score)
- **CBC** – Leukocytosis
- **Blood glucose** – Elevated
- **Serum calcium** – Low (hypocalcemia in severe pancreatitis)

### Nursing Management:
1. **NPO** – Nil by mouth (rest the pancreas); start early enteral nutrition
2. **IV fluids** – Aggressive fluid resuscitation (Ringer's lactate preferred)
3. **Pain management** – Morphine/Tramadol IV; analgesics
4. **NG tube** – If severe vomiting/ileus
5. **Monitor vitals** – BP, pulse, RR, temperature
6. **Monitor blood glucose** – Insulin if hyperglycemia
7. **Antibiotics** – Only if infected necrosis
8. **Position** – Knee-chest (fetal) position relieves pain
9. **Nutritional support** – Nasojejunal feed when able; advance to oral slowly

### ⭐ Exam Points:
> - Most common cause = **Gallstones**
> - Best specific marker = **Serum Lipase**
> - Position of relief = **Knee-chest / Leaning forward**
> - Cullen's sign = periumbilical bruising = **hemorrhagic pancreatitis**
> - **NPO** is the key nursing intervention

---

## 4.6 Gastric Gavage (Tube Feeding / Nasogastric Tube)

### Definition:
Gastric gavage is the administration of liquid nutrition directly into the stomach through a nasogastric (NG) tube.

### Indications:
- Unconscious patient
- Dysphagia (difficulty swallowing)
- Anorexia/malnutrition
- Neonatal feeding

### Nursing Management for NG Tube:
1. **Verify placement** before EVERY feeding:
   - Aspirate and check pH (< 5.5 = stomach)
   - X-ray confirmation (gold standard)
   - Auscultate air insufflation (least reliable)
2. **Position** – Semi-Fowler's (30–45°) during and 30 min after feeding
3. **Check residual volume** – If > 200 mL, hold feeding and recheck
4. **Flush tube** – 20–30 mL water before/after feeding
5. **Oral hygiene** – Regular mouth care
6. **Change tube** – As per protocol
7. **Monitor for complications** – Aspiration, tube displacement, diarrhea

### ⭐ Exam Points:
> - Best way to confirm NG tube placement = **X-ray**
> - Position during feeding = **Semi-Fowler's (30–45°)**

---

# UNIT 5: CARDIOVASCULAR SYSTEM

## 5.1 Angina Pectoris

### Definition:
Angina is **chest pain/discomfort** due to **temporary insufficient blood supply (ischemia)** to the heart muscle, without cell death.

### Types:
| Type | Feature |
|------|---------|
| **Stable angina** | Predictable, on exertion, relieved by rest/nitrates |
| **Unstable angina** | Unpredictable, at rest, doesn't fully resolve; medical emergency |
| **Prinzmetal/Variant** | Coronary artery spasm, occurs at rest/night |

### Causes (Risk Factors for CAD):
- **Modifiable:** Smoking, hypertension, diabetes, obesity, dyslipidemia, physical inactivity
- **Non-modifiable:** Age (>45 men, >55 women), male sex, family history

### Signs & Symptoms:
- **Central chest pain/tightness** – "pressure," "squeezing," "heaviness"
- Pain radiates to **left arm, jaw, neck, back**
- **Diaphoresis** (sweating)
- Nausea
- Dyspnea
- Relieved by rest (stable) or nitrates (within 3–5 min)

### Investigations:
- **ECG** – ST depression, T-wave inversion during pain
- **Stress test (Treadmill test)** – Provokes ischemia
- **Cardiac enzymes** – Troponin (normal in stable angina, elevated in ACS)
- **Echocardiography** – Wall motion abnormalities
- **Coronary angiography** – Gold standard; shows blockage

### Nursing Management:
1. **Rest** – Stop activity immediately during pain
2. **Oxygen** – 4–6 L/min if SpO2 < 94%
3. **Nitrates (GTN)** – Sublingual tablet/spray; repeat every 5 min × 3 doses
   > ⚠️ If no relief after 3 doses → Suspect MI → Call emergency!
4. **Aspirin** – 300 mg chew (antiplatelet)
5. **Morphine** – For severe pain not relieved by nitrates
6. **Monitor ECG** – Continuous cardiac monitoring
7. **Medications** – Beta-blockers (Atenolol), Calcium channel blockers
8. **Risk factor modification** – Smoking cessation, diet, exercise
9. **Patient education** – Carry GTN spray always; how to use it

### ⭐ Exam Points:
> - GTN = Glyceryl trinitrate = **Sublingual**, works in 2–5 min
> - No relief after 3 GTN doses = suspect **MI**
> - Angina = **ischemia without infarction** (no enzyme rise)

---

## 5.2 Myocardial Infarction (MI / Heart Attack)

### Definition:
MI is the **irreversible death (necrosis) of heart muscle** due to prolonged ischemia from complete blockage of a coronary artery.

### Causes:
- Atherosclerotic plaque rupture + thrombosis (most common)
- Coronary artery spasm
- Embolism

### Signs & Symptoms:
- **Severe crushing chest pain** – sudden onset, > 30 minutes
- Not relieved by rest or nitrates
- Radiates to left arm, jaw, back, neck
- **Diaphoresis** (cold sweating)
- Nausea, vomiting
- Dyspnea
- Sense of impending doom
- **Silent MI** – In diabetics and elderly (no pain; just fatigue, breathlessness)

### Investigations:
| Test | Significance |
|------|-------------|
| **ECG** | ST elevation (STEMI), pathological Q waves |
| **Troponin I/T** | Gold standard; rises 4–6 hrs, peaks 24 hrs, elevated for 7–10 days |
| **CK-MB** | Rises 4 hrs, peaks 24 hrs, back to normal in 48 hrs |
| **Myoglobin** | Earliest marker (rises in 1–3 hrs) but not specific |
| **CBC** | Leukocytosis |
| **Echo** | Wall motion abnormality |
| **Coronary angiography** | Shows blocked artery |

### Cardiac Enzyme Timeline:
```
Myoglobin:  Rises 1-3h → Peaks 6-9h → Normal 24h
CK-MB:      Rises 4h   → Peaks 24h  → Normal 48h
Troponin:   Rises 4-6h → Peaks 24h  → Normal 7-10d (BEST MARKER)
```

### Treatment – MONA (Immediate):
- **M** – Morphine (pain relief)
- **O** – Oxygen (if SpO2 < 94%)
- **N** – Nitrates (sublingual GTN)
- **A** – Aspirin 300 mg (chew)

### Reperfusion Therapy:
- **Primary PCI (Angioplasty)** – Preferred if available within 90 min
- **Thrombolysis (tPA/Streptokinase)** – If PCI unavailable, within 12 hrs

### Nursing Management – MI:
1. **Immediate: Call for help; activate emergency protocol**
2. **Rest** – Strict bed rest in CCU
3. **MONA** – Morphine, O2, Nitrates, Aspirin
4. **Continuous ECG monitoring** – Watch for arrhythmias
5. **IV access** – Two large bore IVs
6. **Blood tests** – Serial troponins, ECG
7. **Medications:**
   - Aspirin + Clopidogrel (dual antiplatelet)
   - Beta-blockers (Metoprolol)
   - ACE inhibitors (Ramipril) – within 24 hrs
   - Statins (Atorvastatin)
   - Anticoagulants (Heparin)
8. **Monitor for complications:**
   - Arrhythmias (most common complication)
   - Cardiogenic shock (most common cause of death)
   - Heart failure
9. **Reassurance** – Reduce anxiety (anxiety increases O2 demand)
10. **Bowel care** – Stool softeners (straining raises BP)

### ⭐ Exam Points:
> - Best cardiac marker = **Troponin** (rises in 4–6 hrs, stays elevated for 7–10 days)
> - Earliest marker = **Myoglobin**
> - STEMI = **ST elevation** in at least 2 contiguous leads
> - Immediate treatment = **MONA** (Morphine, O2, Nitrates, Aspirin)
> - Most common complication = **Arrhythmia**
> - Most common cause of death = **Cardiogenic shock**

---

## 5.3 Heart Failure (Cardiac Failure)

### Definition:
Heart failure (HF) is a condition where the heart cannot pump enough blood to meet the body's needs, or can only do so with elevated filling pressures.

### Types:
| Left Heart Failure | Right Heart Failure |
|---|---|
| Lungs affected | Systemic veins affected |
| Dyspnea, orthopnea, PND | Peripheral edema |
| Pulmonary edema | Jugular venous distension |
| Pink frothy sputum | Hepatomegaly |
| Crackles in lungs | Ascites |

### Causes:
- Coronary artery disease/MI (most common)
- Hypertension
- Valve disease
- Cardiomyopathy
- Arrhythmias

### Signs & Symptoms:
- **Dyspnea** (breathlessness) – on exertion → at rest
- **Orthopnea** – Shortness of breath lying flat; needs 2–3 pillows
- **PND** – Paroxysmal Nocturnal Dyspnea (wakes at night gasping)
- **Edema** – Swelling of ankles/legs (pitting edema)
- **Fatigue/weakness**
- **JVD** – Jugular venous distension
- **Crackles** – Heard on lung auscultation
- **S3 gallop** – Extra heart sound

### NYHA Classification of Heart Failure:
| Class | Description |
|-------|-------------|
| **I** | No symptoms with ordinary activity |
| **II** | Slight limitation; symptoms with moderate exertion |
| **III** | Marked limitation; symptoms with minimal exertion |
| **IV** | Symptoms at rest; unable to do any activity |

### Investigations:
- **BNP/NT-proBNP** – Most specific blood test (elevated)
- **Echocardiography** – EF < 40% = reduced EF heart failure
- **Chest X-ray** – Cardiomegaly, pulmonary edema, Kerley B lines
- **ECG** – Look for arrhythmias, LVH
- **CBC, U&E, LFT** – Assess organ function

### Nursing Management:
1. **Positioning** – High Fowler's / semi-Fowler's (sit up, reduces pulmonary congestion)
2. **Oxygen therapy** – Maintain SpO2 > 94%
3. **Daily weight** – Same time, same scale; report > 1 kg gain/day (fluid retention)
4. **Fluid restriction** – 1.5–2 L/day
5. **Low sodium diet** – Reduces fluid retention
6. **Monitor I&O** – Strict intake/output chart
7. **Medications:**
   - **Diuretics** (Furosemide) – Reduce fluid overload
   - **ACE inhibitors** (Enalapril) / ARBs – Reduce afterload
   - **Beta-blockers** (Carvedilol) – Reduce HR, improve EF
   - **Digoxin** – Increase contractility, slow HR
   - **Aldosterone antagonists** (Spironolactone)
8. **Activity** – Graded activity; rest between activities
9. **Skin care** – Edematous limbs at risk for breakdown
10. **Patient education** – Weigh daily, low salt diet, medication compliance

### ⭐ Exam Points:
> - BNP elevated = **Heart Failure** (most specific marker)
> - Orthopnea = "needs 2–3 pillows to sleep" = **Left Heart Failure**
> - Daily weight monitoring = detect **fluid retention early**
> - Furosemide = **loop diuretic** = first-line for fluid overload
> - EF < 40% = **HFrEF** (reduced ejection fraction)

---

# UNIT 6: HEMATOLOGICAL SYSTEM

## 6.1 Anemia

### Definition:
Anemia is a condition where the **hemoglobin (Hb) concentration** is below normal:
- Men: Hb < 13 g/dL
- Women: Hb < 12 g/dL
- Children: Hb < 11 g/dL

### Types & Causes:
| Type | Cause | MCV |
|------|-------|-----|
| **Iron deficiency anemia** | Poor diet, bleeding, malabsorption | Low (microcytic) |
| **Megaloblastic anemia** | B12/Folate deficiency | High (macrocytic) |
| **Hemolytic anemia** | RBC destruction (sickle cell, G6PD) | Normal/high |
| **Aplastic anemia** | Bone marrow failure | Normal |
| **Anemia of chronic disease** | Chronic illness | Normal/low |

### Signs & Symptoms:
- **Pallor** – Pale skin, conjunctiva, palms
- **Fatigue and weakness**
- **Dyspnea on exertion**
- **Tachycardia**
- **Dizziness/headache**
- **Koilonychia** – Spoon-shaped nails (iron deficiency)
- **Glossitis** – Sore, smooth tongue (B12/folate deficiency)
- **Angular stomatitis** – Cracks at corners of mouth

### Investigations:
- **CBC** – Hb, RBC, MCV, MCH, MCHC
- **Peripheral blood smear** – RBC morphology
- **Serum iron, TIBC, ferritin** – Iron studies
- **Serum B12, folate**
- **Reticulocyte count**
- **Bone marrow biopsy** – In aplastic/unclear anemia

### Nursing Management:
1. **Rest** – Balance activity and rest; energy conservation
2. **Diet:**
   - Iron-rich foods: Green leafy vegetables, meat, eggs, beans
   - Vit C with iron (increases absorption)
   - Avoid tea/coffee with meals (reduces iron absorption)
3. **Iron supplements** – Ferrous sulfate (oral); IV iron if severe
   - Give on empty stomach for best absorption
   - Can cause dark stool (normal, not harmful)
4. **B12 injections** – For pernicious anemia (can't absorb oral B12)
5. **Blood transfusion** – For severe symptomatic anemia
6. **Monitor Hb** – Regular CBC
7. **Oxygen** – If respiratory distress
8. **Fall prevention** – Dizziness risk

### ⭐ Exam Points:
> - Most common anemia = **Iron Deficiency Anemia**
> - Koilonychia = **Spoon nails** = Iron deficiency
> - Vit C → enhances iron absorption
> - Tea/coffee → inhibits iron absorption
> - B12 deficiency → **Pernicious anemia** + neurological symptoms

---

## 6.2 Leukemia

### Definition:
Leukemia is a **malignant (cancerous) disease of white blood cells**, originating in bone marrow.

### Types:
| Type | Features |
|------|---------|
| **ALL** (Acute Lymphoblastic) | Children; lymphoid cells; fast |
| **AML** (Acute Myeloid) | Adults; myeloid cells; fast |
| **CLL** (Chronic Lymphocytic) | Elderly; most common adult leukemia |
| **CML** (Chronic Myeloid) | Philadelphia chromosome; slow |

### Signs & Symptoms:
- **Pallor and fatigue** (anemia – not enough normal RBCs)
- **Infections** (neutropenia – not enough normal WBCs)
- **Bleeding/bruising** (thrombocytopenia – low platelets)
- **Bone pain** (marrow infiltration)
- **Lymphadenopathy** (swollen lymph nodes)
- **Splenomegaly/Hepatomegaly**
- **Night sweats, fever, weight loss** (B symptoms)

### Investigations:
- **CBC** – Very high WBC (50,000–200,000+) or paradoxically low
- **Peripheral blood smear** – **Blast cells** (immature WBCs)
- **Bone marrow biopsy** – > 20% blasts = leukemia (gold standard)
- **Immunophenotyping** – Flow cytometry to classify type
- **Cytogenetics** – Philadelphia chromosome in CML

### Nursing Management:
1. **Chemotherapy care** – Monitor for nausea, hair loss, mucositis
2. **Infection prevention:**
   - Reverse isolation / neutropenic precautions
   - No fresh flowers/fruits in room
   - Strict hand hygiene
   - Avoid crowded places
3. **Bleeding precautions:**
   - Soft toothbrush
   - Electric razor only
   - Avoid IM injections (risk of bleeding)
   - Apply pressure after blood draws
4. **Platelet transfusion** – If platelets < 20,000
5. **Blood transfusion** – For anemia
6. **Mouth care** – Chlorhexidine rinses for mucositis
7. **Nutritional support** – High calorie, high protein
8. **Pain management** – Bone pain
9. **Psychological support** – Cancer diagnosis; emotional support
10. **Bone marrow transplant** – Definitive treatment for some types

### ⭐ Exam Points:
> - Blast cells in blood = **Leukemia**
> - Neutropenic precautions = **Reverse isolation**
> - Philadelphia chromosome = **CML**
> - Most common childhood leukemia = **ALL**

---

## 6.3 Lymphoma

### Definition:
Lymphoma is a **cancer of the lymphatic system** (lymph nodes, spleen, thymus).

### Types:
| Hodgkin's Lymphoma | Non-Hodgkin's Lymphoma |
|---|---|
| **Reed-Sternberg cells** (owl-eye cells) | No Reed-Sternberg cells |
| Young adults + elderly (bimodal) | More common |
| Better prognosis | More aggressive |
| Contiguous spread | Non-contiguous |

### Signs & Symptoms:
- **Painless lymphadenopathy** (most common presenting sign)
- **B symptoms** – Fever, Night sweats, Weight loss (> 10% body weight)
- **Pruritus** (itching)
- Fatigue
- **Pel-Ebstein fever** – Classic in Hodgkin's (fever with periodic pattern)

### ⭐ Exam Points:
> - Reed-Sternberg cell = **Hodgkin's Lymphoma** (owl-eye appearance)
> - Painless swollen lymph nodes = think **Lymphoma**
> - B symptoms = Fever + Night sweats + Weight loss

---

# UNIT 7: ENDOCRINE SYSTEM

## 7.1 Diabetes Mellitus (DM)

### Definition:
Diabetes Mellitus is a group of metabolic diseases characterized by **chronic hyperglycemia** (high blood glucose) due to defective insulin secretion, insulin action, or both.

### Types:
| Feature | Type 1 DM | Type 2 DM |
|---------|-----------|-----------|
| **Cause** | Autoimmune destruction of beta cells | Insulin resistance + relative deficiency |
| **Age** | Young (< 30 years) | Adults (> 40 years) |
| **Insulin** | ALWAYS needed | Initially lifestyle/tablets; insulin later |
| **Body weight** | Usually thin | Usually obese |
| **DKA** | Common | Rare |

### Diagnostic Criteria:
- **Fasting glucose** ≥ 126 mg/dL
- **2-hr OGTT** ≥ 200 mg/dL
- **Random glucose** ≥ 200 mg/dL + symptoms
- **HbA1c** ≥ 6.5%
- Normal HbA1c < 5.7%

### Signs & Symptoms (Classic 3 Ps):
- **Polyuria** – Excessive urination
- **Polydipsia** – Excessive thirst
- **Polyphagia** – Excessive hunger
- Plus: weight loss, fatigue, blurred vision, frequent infections

### Chronic Complications:
| Type | Examples |
|------|---------|
| **Microvascular** | Retinopathy (eyes), Nephropathy (kidney), Neuropathy (nerves) |
| **Macrovascular** | CAD, Stroke, Peripheral vascular disease |
| **Others** | Diabetic foot ulcers, recurrent infections |

### Acute Complications:
1. **DKA (Diabetic Ketoacidosis)** – Type 1; high glucose + ketones + acidosis
2. **HHS (Hyperosmolar Hyperglycemic State)** – Type 2; very high glucose, no ketones
3. **Hypoglycemia** – Blood glucose < 70 mg/dL

### Hypoglycemia Management (< 70 mg/dL):
- **15-15 Rule:** Give 15g fast-acting carbs → recheck in 15 min
- If unconscious: IV Dextrose 50% or Glucagon injection
- Symptoms: shakiness, sweating, confusion, palpitations

### Investigations:
- **FBS, RBS, PPBS** – Blood glucose levels
- **HbA1c** – 3-month average blood sugar control (target < 7%)
- **Urine glucose, ketones**
- **Lipid profile, Renal function (creatinine, urine microalbumin)**
- **Annual eye check, foot exam**

### Insulin Types:
| Type | Onset | Peak | Duration | Example |
|------|-------|------|----------|---------|
| **Rapid** | 15 min | 1 hr | 3–5 hrs | Lispro (Humalog) |
| **Short (Regular)** | 30 min | 2–4 hrs | 6–8 hrs | Actrapid |
| **Intermediate (NPH)** | 1–2 hrs | 6–8 hrs | 12–18 hrs | Insulatard |
| **Long-acting** | 1 hr | No peak | 24 hrs | Glargine (Lantus) |

### Nursing Management – Diabetes:
1. **Blood glucose monitoring** – Before meals and at bedtime
2. **Insulin administration:**
   - Rotate injection sites (abdomen, thigh, arms)
   - Inject at 90° (subcutaneous); thin patients 45°
   - Store insulin properly (refrigerator, avoid freezing)
3. **Diet counseling:**
   - Consistent carbohydrate intake
   - Low glycemic index foods
   - Avoid sugar, refined carbs
   - Regular meal timing
4. **Exercise education** – Regular moderate exercise; check glucose before and after
5. **Foot care:**
   - Inspect feet daily
   - Wear proper footwear
   - No barefoot walking
   - Keep feet clean and moisturized
6. **Oral hypoglycemics** – Metformin (first line for Type 2)
7. **Sick day rules** – Continue insulin; increase monitoring; stay hydrated
8. **Complication monitoring** – Annual eye, kidney, foot checks

### ⭐ Exam Points:
> - HbA1c target = **< 7%** (in most patients)
> - Insulin rotation site = **Abdomen** (fastest absorption)
> - Metformin = first-line for **Type 2 DM**
> - DKA = **Type 1** | HHS = **Type 2** (no ketones)
> - **Never skip insulin** even if not eating (reduce dose, don't stop)

---

## 7.2 Hypothyroidism

### Definition:
Hypothyroidism is a condition where the **thyroid gland produces insufficient thyroid hormones** (T3 and T4).

### Causes:
- **Hashimoto's thyroiditis** (most common – autoimmune)
- Iodine deficiency (most common worldwide – goiter)
- Post-thyroidectomy
- Radioactive iodine treatment
- Congenital (cretinism in newborns)

### Signs & Symptoms – "Everything SLOWS DOWN":
- **Fatigue, lethargy**
- **Weight gain** (despite poor appetite)
- **Cold intolerance**
- **Constipation**
- **Dry skin, dry hair, hair loss**
- **Bradycardia** (slow heart rate)
- **Hoarse voice**
- **Memory impairment, depression**
- **Menstrual irregularity**
- **Goiter** (enlarged thyroid – in iodine deficiency)
- **Myxedema** – Severe hypothyroidism; non-pitting edema of face/body

### Investigations:
- **TSH** – **Elevated** (most sensitive test)
- **T4 (Free T4)** – Low
- **Anti-TPO antibodies** – Elevated in Hashimoto's
- **CBC** – Anemia
- **Lipid profile** – Elevated cholesterol

### Nursing Management:
1. **Medications** – Levothyroxine (T4 replacement) – take on empty stomach, 30 min before breakfast
2. **Monitor TSH** – Regular checks to adjust dose
3. **Warmth** – Extra clothing/blankets (cold intolerance)
4. **Diet** – High fiber (constipation), adequate calories
5. **Activity** – Gradual increase; fatigue is common
6. **Skin care** – Moisturize dry skin
7. **Safety** – Memory issues → supervision if needed
8. **Myxedema coma** – Emergency: IV T4, steroids, warming

### ⭐ Exam Points:
> - TSH elevated = **Hypothyroidism** (TSH is inversely proportional to thyroid hormones)
> - Most common cause = **Hashimoto's thyroiditis**
> - Treatment = **Levothyroxine** (taken 30 min before breakfast, empty stomach)
> - Cretinism = hypothyroidism in newborns → mental retardation if untreated

---

## 7.3 Hyperthyroidism

### Definition:
Hyperthyroidism is excess production of thyroid hormones, causing accelerated body metabolism.

### Causes:
- **Graves' disease** (most common – autoimmune)
- Toxic multinodular goiter
- Thyroid adenoma
- Excessive iodine intake

### Signs & Symptoms – "Everything SPEEDS UP":
- **Weight loss** (despite increased appetite)
- **Heat intolerance**
- **Tachycardia** (fast heart rate), palpitations
- **Tremors** of hands
- **Diarrhea**
- **Anxiety, restlessness, insomnia**
- **Sweating**
- **Exophthalmos** – Bulging eyes (Graves' disease)
- **Pretibial myxedema** – Thickening of skin over shins
- **Goiter**

### Investigations:
- **TSH** – **Very Low / Suppressed**
- **T3, T4** – Elevated
- **TSI (Thyroid Stimulating Immunoglobulin)** – Positive in Graves' disease
- **Thyroid scan** – Diffuse uptake in Graves'

### Treatment:
- **Antithyroid drugs** – Carbimazole / Propylthiouracil (PTU)
- **Beta-blockers** (Propranolol) – Control symptoms (palpitations, tremor)
- **Radioactive iodine (RAI)** – Destroys thyroid tissue
- **Surgery (thyroidectomy)** – Remove thyroid

### ⭐ Exam Points:
> - Graves' disease = Hyperthyroidism + **Exophthalmos** + Goiter
> - TSH **low** = Hyperthyroidism (opposite of hypothyroidism)
> - Thyroid storm = Life-threatening hyperthyroidism emergency

---

# UNIT 8: INTEGUMENTARY SYSTEM (SKIN)

## 8.1 Psoriasis

### Definition:
Psoriasis is a **chronic, autoimmune skin disease** characterized by rapid turnover of skin cells, leading to thick, scaly plaques.

### Causes:
- Autoimmune (T-cell mediated) – most common
- Genetic predisposition
- **Triggers:** Stress, infections, certain drugs (beta-blockers, lithium), injury to skin (Koebner phenomenon)

### Signs & Symptoms:
- **Well-defined, red (erythematous) plaques** covered with **silvery-white scales**
- **Sites:** Scalp, elbows, knees, lower back, nails
- **Nail changes:** Pitting, onycholysis (separation of nail from bed)
- **Itching** (variable)
- **Auspitz sign** – Pinpoint bleeding when scales removed
- **Psoriatic arthritis** – Joint pain in some patients

### Investigations:
- Clinical diagnosis (mainly)
- Skin biopsy – confirms diagnosis
- Joint X-rays – if arthritis

### Nursing Management:
1. **Topical treatments** – Corticosteroids, Vitamin D analogues (Calcipotriol), Coal tar
2. **Emollients** – Moisturizers to prevent dryness
3. **Phototherapy** – UVB light therapy; PUVA (Psoralen + UVA)
4. **Systemic drugs** – Methotrexate, Cyclosporine (severe cases)
5. **Biologics** – TNF inhibitors (Adalimumab) – severe cases
6. **Skin care:**
   - Avoid hot baths; use lukewarm water
   - Pat dry gently (don't rub)
   - Moisturize immediately after bath
7. **Identify triggers** – Stress management, avoid injury to skin
8. **Psychological support** – Chronic condition affects body image

### ⭐ Exam Points:
> - Psoriasis = **Silvery white scales on red plaques**
> - Auspitz sign = **Pinpoint bleeding** on removing scales
> - Koebner phenomenon = **New lesion at site of skin injury**

---

## 8.2 Eczema (Atopic Dermatitis)

### Definition:
Eczema is a **chronic inflammatory skin condition** characterized by itchy, inflamed skin.

### Causes:
- Genetic predisposition (atopy)
- Triggers: Soaps, detergents, sweat, dust mites, certain foods, stress

### Signs & Symptoms:
- **Intense itching (pruritus)** – Key symptom
- **Dry skin**
- **Red, inflamed patches** → in children: face, neck, inner elbows
- **Oozing, crusting** in acute phase
- **Lichenification** (thickened skin) – Chronic scratching

### Nursing Management:
1. **Emollients** – Liberally apply moisturizers; cornerstone of treatment
2. **Topical corticosteroids** – Reduce inflammation
3. **Topical calcineurin inhibitors** – Tacrolimus (non-steroid option)
4. **Antihistamines** – Chlorpheniramine for itch relief
5. **Avoid triggers** – Identify and avoid personal triggers
6. **Bathing:** Lukewarm (not hot) water; mild soap; pat dry; moisturize immediately
7. **Wet dressing** – For acute, weeping eczema
8. **Prevent scratching** – Short nails, cotton gloves at night

### ⭐ Exam Points:
> - Key symptom of eczema = **Pruritus (itching)**
> - Best treatment = **Emollients (moisturizers) + Topical steroids**

---

# UNIT 9: MUSCULOSKELETAL SYSTEM

## 9.1 Fractures

### Definition:
A fracture is a **break in the continuity of bone**, caused by trauma, stress, or pathological weakening.

### Types of Fractures:
| Type | Description |
|------|-------------|
| **Closed (Simple)** | Bone broken; skin intact |
| **Open (Compound)** | Bone pierces through skin; infection risk HIGH |
| **Comminuted** | Bone broken into multiple fragments |
| **Greenstick** | Incomplete break; one side bent; children |
| **Stress** | Hairline crack from repetitive force |
| **Pathological** | Due to disease (osteoporosis, tumor) |
| **Transverse** | Straight across the bone |
| **Oblique** | Diagonal break |

### Signs & Symptoms (6 Ps + more):
- **Pain** at fracture site
- **Pallor** of limb
- **Pulse** changes (check distal pulse)
- **Paresthesia** (numbness/tingling)
- **Paralysis** (loss of movement)
- **Pressure** (compartment syndrome)
- **Swelling and bruising**
- **Deformity** – limb in abnormal position
- **Crepitus** – Grating sound/sensation of bone ends
- **Loss of function**

### Investigations:
- **X-ray** – Gold standard; AP and lateral views
- **CT scan** – Complex fractures
- **MRI** – Soft tissue injury, stress fractures
- **Bone scan** – Occult fractures

### Emergency Management – Fracture First Aid:
1. **Immobilize** – Splint the fracture (joint above and below)
2. **RICE** – Rest, Ice, Compression, Elevation
3. **Control bleeding** – If open fracture: sterile dressing
4. **Monitor circulation** – Check pulse, color, sensation distal to fracture
5. **IV access + Fluids** – Shock risk in major fractures
6. **Pain management** – Analgesics
7. **Transport** – Careful immobilized transport to hospital

### Nursing Management in Hospital:
1. **Pain management** – Regular analgesics; morphine for severe pain
2. **Neurovascular check** – Every 1–2 hours: check the 6 Ps
3. **Cast/Splint care:**
   - Keep cast dry
   - Check for pressure sores (pain inside cast)
   - Do not insert objects inside cast
   - Elevate limb to reduce swelling
4. **Traction care** (see below)
5. **Nutrition** – High calcium (dairy), Vitamin D, Vitamin C (collagen for healing)
6. **Prevent DVT** – Foot/leg exercises, early ambulation, anticoagulants
7. **Skin care** – Pressure sore prevention under cast/traction
8. **Rehabilitation** – Physiotherapy; gentle exercises

### ⭐ Exam Points:
> - Open fracture = **infection risk** → sterile dressing immediately
> - 6 Ps = Pain, Pallor, Pulse, Paresthesia, Paralysis, Pressure
> - Cast care: Never cut cast without doctor's order; elevation for swelling
> - Compartment syndrome = **Emergency** → Fasciotomy

---

## 9.2 Traction

### Definition:
Traction is the application of **pulling force** to a body part to reduce fractures, align bones, or relieve pressure on joints/nerves.

### Types:
| Type | Description | Example |
|------|-------------|---------|
| **Skin traction** | Weight applied via skin strips/bandage | Buck's traction (femur fracture) |
| **Skeletal traction** | Pin/wire inserted through bone | Balanced skeletal traction |
| **Manual traction** | Hands apply force | During fracture reduction |

### Nursing Management – Traction:
1. **Maintain traction:** Never remove weights without doctor's order
2. **Ensure weights hang freely** – Not resting on bed or floor
3. **Maintain proper alignment** – Body in correct position
4. **Neurovascular checks** – Regular 6P checks
5. **Skin care:**
   - Check skin under traction apparatus
   - Prevent pressure sores (bony prominences)
   - Change position carefully
6. **Pin site care** (skeletal traction):
   - Clean pin sites daily with antiseptic
   - Watch for infection signs (redness, drainage, odor)
7. **Prevent complications:**
   - **DVT** – Foot exercises, compression stockings
   - **Pneumonia** – Deep breathing, coughing
   - **Constipation** – High fiber diet, adequate fluids
   - **Pressure sores** – Regular repositioning
8. **Nutrition** – Adequate protein and calcium

### ⭐ Exam Points:
> - Never remove traction weights without doctor's order
> - Pin site care = daily cleaning to prevent **osteomyelitis (bone infection)**
> - Major complication of long-term traction = **DVT**

---

# UNIT 10: COMMUNICABLE DISEASES

## 10.1 Malaria

### Definition:
Malaria is an **acute febrile illness** caused by **Plasmodium** parasites, transmitted through the bite of infected **female Anopheles mosquito**.

### Types of Plasmodium:
| Species | Severity | Cycle |
|---------|----------|-------|
| **P. falciparum** | Most dangerous | 36–48 hrs |
| **P. vivax** | Relapsing malaria | 48 hrs |
| **P. malariae** | Quartan fever | 72 hrs |
| **P. ovale** | Mild | 48 hrs |

### Classic Malaria Fever Pattern:
**Cold Stage → Hot Stage → Sweating Stage**
- Cold stage: Shivering (30 min–1 hr)
- Hot stage: High fever 39–41°C (2–6 hrs)
- Sweating stage: Profuse sweating, temperature falls, exhaustion

### Signs & Symptoms:
- Fever with rigors (chills and shaking)
- Headache, body ache
- Nausea, vomiting
- Fatigue
- Splenomegaly (chronic/recurrent malaria)
- **Severe malaria (P. falciparum):**
  - Cerebral malaria (convulsions, coma)
  - Blackwater fever (hemoglobinuria → black urine)
  - ARDS, renal failure

### Investigations:
- **Peripheral blood smear** – Gold standard; see Plasmodium in RBCs
- **RDT (Rapid Diagnostic Test)** – Quick HRP2 antigen test
- **CBC** – Thrombocytopenia, anemia, leukopenia
- **Blood glucose** – Hypoglycemia in falciparum

### Treatment:
| Type | Drug |
|------|------|
| **P. falciparum** | Artemisinin-based Combination Therapy (ACT) e.g., Artesunate + Lumefantrine |
| **P. vivax/ovale** | Chloroquine + Primaquine (to kill liver stages) |

### Nursing Management:
1. **Antipyretics** – Paracetamol; tepid sponging
2. **Fluid management** – IV fluids if severe; monitor I&O
3. **Antimalarials** – Ensure medication compliance
4. **Monitor blood glucose** – Hypoglycemia is common
5. **Monitor for cerebral malaria** – LOC, seizures → airway protection
6. **Blood transfusion** – If severe anemia
7. **Mosquito prevention** – LLIN (Long-lasting insecticidal nets), repellents, protective clothing

### ⭐ Exam Points:
> - Vector = **Female Anopheles mosquito**
> - Most dangerous = **P. falciparum** (cerebral malaria)
> - Diagnosis = **Peripheral blood smear** (gold standard)
> - P. vivax = takes **Primaquine** to clear liver hypnozoites

---

## 10.2 Dengue Fever

### Definition:
Dengue is an acute viral illness caused by **Dengue virus (DENV 1–4 serotypes)**, transmitted by **Aedes aegypti mosquito** (day-biting mosquito).

### Transmission:
- **Aedes aegypti** (primary) and Aedes albopictus mosquitoes
- Day-biting mosquitoes (unlike Anopheles which bite at night)
- No direct person-to-person transmission

### Signs & Symptoms:

**Classic Dengue Fever:**
- **Sudden high fever** (39–40°C) – "Breakbone fever"
- **Severe headache**
- **Retro-orbital pain** (pain behind eyes)
- **Myalgia** (muscle pain) and **arthralgia** (joint pain)
- **Rash** – maculopapular, spares palms/soles; appears on day 3–5
- **Flushed face**

**Dengue Warning Signs (seek immediate care):**
- Abdominal pain
- Persistent vomiting
- Bleeding (gums, nose, skin petechiae)
- Rapid breathing
- Restlessness or lethargy

**Dengue Hemorrhagic Fever (DHF):**
- Plasma leakage → hemoconcentration
- Thrombocytopenia (platelets < 100,000)
- Bleeding manifestations
- **Dengue Shock Syndrome** = most severe

### Investigations:
- **NS1 antigen** – Positive in first 5 days (early)
- **Dengue IgM/IgG** – After day 5 (serology)
- **CBC** – Thrombocytopenia (< 100,000), leukopenia, rising hematocrit (hemoconcentration)
- **Tourniquet test** – > 10 petechiae in 2.5 cm square = positive

### Nursing Management:
1. **Rest** – Complete bed rest
2. **Oral rehydration** – 2.5 L/day; IV fluids if vomiting or shock
3. **Antipyretics** – Paracetamol ONLY
   > ⚠️ **AVOID Aspirin and NSAIDs** – increase bleeding risk!
4. **Monitor platelet count** – Daily CBC
5. **Bleeding precautions:**
   - Avoid injections if possible
   - Soft toothbrush
   - No rectal temperature
   - Monitor for petechiae, ecchymosis
6. **Monitor for shock** – BP, pulse, urine output
7. **Platelet transfusion** – Only if < 10,000 or active bleeding
8. **Mosquito prevention** – Eliminate breeding sites (stagnant water)

### ⭐ Exam Points:
> - Vector = **Aedes aegypti** (day-biting!)
> - Paracetamol YES; **Aspirin/NSAIDs NO** in dengue
> - NS1 antigen = early marker (day 1–5)
> - "Breakbone fever" = dengue
> - Thrombocytopenia + Hemoconcentration = **DHF**

---

## 10.3 Infection Control (Barrier Nursing)

### Types of Precautions:
| Type | Protection from | PPE Required |
|------|----------------|-------------|
| **Standard** | All patients | Gloves, gown if splash risk |
| **Contact** | Direct contact/fomites (MRSA, C. diff) | Gloves + Gown |
| **Droplet** | Respiratory droplets > 5μm (flu, meningitis) | Surgical mask |
| **Airborne** | Droplet nuclei < 5μm (TB, measles, varicella) | **N95 mask** + negative pressure room |

### Barrier Nursing:
Used to **PROTECT the patient** from infection (immunocompromised patients).
- Also called **Reverse Barrier / Protective Isolation**
- Used in: Leukemia patients on chemo, Bone marrow transplant, Severe burns
- Visitors wear gown, mask, gloves BEFORE entering

### Standard (Normal) Isolation:
Used to **PROTECT OTHERS** from an infected patient.

### Hand Hygiene (Most Important Infection Control):
**WHO 5 Moments of Hand Hygiene:**
1. Before patient contact
2. Before aseptic procedure
3. After body fluid exposure
4. After patient contact
5. After touching patient surroundings

**Hand washing steps: 6 steps × 15–20 seconds**

### ⭐ Exam Points:
> - TB = **Airborne precautions** → N95 mask + negative pressure room
> - Dengue patient = **Standard precautions** (not directly transmitted)
> - Reverse isolation = Protect **immunocompromised** patient
> - Most effective infection control = **Hand washing**

---

# UNIT 11: PERIOPERATIVE NURSING – STOMA CARE

## 11.1 Stoma Care

### Definition:
A stoma is a **surgically created opening** from inside the body to the outside through the abdominal wall.

### Types:
| Type | Location | Output |
|------|---------|--------|
| **Colostomy** | Large intestine | Formed/soft stool |
| **Ileostomy** | Small intestine | Liquid/watery stool |
| **Urostomy** | Urinary diversion | Urine |

### Nursing Management – Stoma Care:
1. **Assess stoma:**
   - Color should be **pink/red, moist** (healthy)
   - Report if dark, dusky, or dry (compromised blood supply)
2. **Appliance change** (every 3–5 days or when leaking):
   - Wash hands
   - Remove old bag gently
   - Clean around stoma with warm water; pat dry
   - Measure stoma size; cut appliance 2–3mm larger
   - Apply skin barrier paste
   - Apply new bag
3. **Skin care** – Prevent peristomal skin breakdown (enzymes in stool damage skin)
4. **Dietary advice:**
   - Chew food well
   - Adequate fluids
   - Foods that cause odor: onions, fish, eggs
   - Foods that help with odor: yogurt, parsley
5. **Patient education:**
   - Showering with stoma bag
   - Activities: can swim, exercise
   - When to call nurse: bleeding, unusual color, prolapse, obstruction
6. **Psychological support** – Body image changes; support groups

### ⭐ Exam Points:
> - Healthy stoma = **pink, moist, slightly raised**
> - Dark/dusky stoma = **compromised blood supply** → report immediately
> - Ileostomy output = **watery** (higher electrolyte loss risk)

---

# ⭐ MASTER QUICK REVISION CHART

## Respiratory System at a Glance:

| Disease | Key Feature | Key Drug | Nursing Priority |
|---------|------------|---------|-----------------|
| COPD | Barrel chest, FEV1/FVC < 0.7 | Bronchodilators | Low-flow O2 (1–2L) |
| Pneumonia | Consolidation on CXR | Antibiotics | High Fowler's, Fluids |
| TB | AFB, cavitation on CXR | HRZE | Airborne isolation, DOTS |
| ARDS | Bilateral white-out, refractory hypoxia | None (supportive) | Prone position, PEEP |
| Lung Abscess | Cavity with air-fluid level | Penicillin | Postural drainage |

## Cardiovascular at a Glance:

| Disease | Key Marker | Key Drug | Nursing Priority |
|---------|-----------|---------|-----------------|
| Angina | ECG: ST depression | GTN sublingual | Rest, GTN, O2 |
| MI | Troponin elevated | Aspirin + Thrombolysis | MONA, CCU monitoring |
| Heart Failure | BNP elevated | Furosemide | High Fowler's, Daily weight |

## GI System at a Glance:

| Disease | Key Investigation | Key Finding | Nursing Priority |
|---------|-----------------|-------------|-----------------|
| Peptic Ulcer | Endoscopy | Ulcer crater | Avoid NSAIDs, PPIs |
| Cirrhosis | Liver biopsy | Fibrosis | Low Na diet, Lactulose |
| Pancreatitis | Serum Lipase | Elevated >3× | NPO, IV fluids |
| Hepatitis B | HBsAg | Positive | Standard precautions |

## Endocrine at a Glance:

| Disease | TSH | T4 | Key Drug |
|---------|-----|----|----|
| Hypothyroidism | HIGH ↑ | LOW ↓ | Levothyroxine |
| Hyperthyroidism | LOW ↓ | HIGH ↑ | Carbimazole |

## Communicable Diseases at a Glance:

| Disease | Vector | Key Test | Key Drug |
|---------|--------|---------|---------|
| Malaria | Female Anopheles | Blood smear | ACT (falciparum) |
| Dengue | Aedes aegypti | NS1 antigen | Paracetamol only |
| TB | Airborne | Sputum AFB | DOTS (6 months) |

---

# 🧠 MNEMONICS FOR EXAM SUCCESS

| Topic | Mnemonic |
|-------|---------|
| Wound healing stages | **H-I-P-R** (Hemostasis-Inflammation-Proliferation-Remodeling) |
| Pancreatitis causes | **GET SMASHED** |
| Fracture complications | **6 Ps** (Pain, Pallor, Pulse, Paresthesia, Paralysis, Pressure) |
| MI immediate treatment | **MONA** (Morphine, O2, Nitrates, Aspirin) |
| DM classic symptoms | **3 Ps** (Polyuria, Polydipsia, Polyphagia) |
| TB drugs | **HRZE** (Isoniazid, Rifampicin, Pyrazinamide, Ethambutol) |
| TB side effects | **R**ifampicin = **R**ed urine; **I**soniazid = **I**mpairs nerves (B6!) |
| Dengue warning | **Avoid Aspirin** (AA = Always Avoid Aspirin in dengue) |

---

# 📋 IMPORTANT EXAM POINTS – TOP 30

1. **COPD:** Low flow O2 (1–2 L/min) to prevent loss of hypoxic drive
2. **ARDS:** Bilateral white-out on CXR; prone positioning; lung protective ventilation
3. **Pneumonia:** CXR shows consolidation; rusty sputum = pneumococcal
4. **TB:** Airborne precautions; N95; DOTS 6 months; Rifampicin = orange urine
5. **Peptic Ulcer:** H. pylori most common cause; OGD = gold standard
6. **Pancreatitis:** Serum lipase most specific; GET SMASHED causes; NPO
7. **Cirrhosis:** Lactulose for encephalopathy; low sodium for ascites
8. **Hepatitis B:** HBsAg = active infection; blood-borne; vaccine available
9. **MI:** Troponin = best marker; MONA immediate; STEMI = ST elevation
10. **Heart Failure:** BNP elevated; daily weight; High Fowler's; Furosemide
11. **Angina:** GTN sublingual; no relief in 3 doses = possible MI
12. **Anemia:** Most common = iron deficiency; Koilonychia = spoon nails
13. **Leukemia:** Blast cells in blood; reverse isolation; bleeding precautions
14. **Lymphoma:** Reed-Sternberg cells = Hodgkin's; painless lymphadenopathy
15. **Diabetes Type 1 DM:** Always needs insulin; DKA common
16. **HbA1c target:** < 7% (well-controlled diabetes)
17. **Hypothyroidism:** TSH HIGH; Levothyroxine; empty stomach
18. **Hyperthyroidism:** TSH LOW; Graves' = exophthalmos
19. **Psoriasis:** Silvery white scales; Auspitz sign; Koebner phenomenon
20. **Fracture:** X-ray = gold standard; Open fracture = sterile dressing; 6Ps
21. **Traction:** Never remove weights; pin site care daily
22. **Malaria:** Female Anopheles; peripheral blood smear; P. falciparum = most dangerous
23. **Dengue:** Aedes aegypti; NS1 antigen; NO aspirin/NSAIDs; paracetamol only
24. **TB isolation:** N95 mask + negative pressure room = AIRBORNE precautions
25. **Stoma:** Pink/red = healthy; dark/dusky = emergency
26. **NG tube:** Position = semi-Fowler's; X-ray = gold standard to verify
27. **Pre-op checklist:** Consent, NPO, skin prep, IV line, baseline vitals, WHO checklist
28. **Hand hygiene:** WHO 5 moments; most effective infection control
29. **DKA vs HHS:** DKA = Type 1 + ketones; HHS = Type 2 + no ketones
30. **Compartment syndrome:** 6Ps; surgical emergency = fasciotomy

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*Prepared as per B.Sc. Nursing Semester III Syllabus – Adult Health Nursing I (Medical Surgical Nursing)*
*These notes cover: Definitions | Causes | Signs & Symptoms | Investigations | Nursing Management | Exam Points | Quick Revision*