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Biomedical Waste Management

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Segregation of Hospital Bio-Medical Waste

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• Each waste type is color-coded to prevent cross-contamination during handling.
• Cytotoxic/infected waste (yellow bin) requires the most aggressive treatment - plasma pyrolysis or incineration followed by deep burial.
• Sharps are handled separately in rigid containers and sent to a Common Treatment Facility before disposal in a sharp pit.
• Glassware (blue bin) is the only category designated for recycling.Here is a comprehensive summary of all 5 pages on Phlebotomy:

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Phlebotomy - Complete Study Notes

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1. Phlebotomy Veins

Preferred Site:

Preferred Vein:

Not Preferred but CAN be Used:

• Why? Tendency to roll

Should NOT be Used:

• Why? Lies close to the brachial nerve and artery

Hand/Wrist Veins:

• Can be used when a suitable arm vein cannot be located

Arm Anatomy Diagram Shows:

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2. Tourniquet Technique for Phlebotomy (Step-by-Step)

1. Patient Identification - Use 2 identifiers (name + date of birth), ask open-ended questions
2. Requisition Form - Tally with test request form (patient details + test types)
3. Assess Physical Disposition - Diet, exercise, stress, basal state (e.g., fasting for glucose)
4. Label tubes with appropriate ID/barcode
5. Posture - Patient lies supine or sitting; NEVER standing (risk of syncope)
6. Apply Tourniquet - 10 cm proximal to chosen site; patient lowers arm and clenches/releases fist repeatedly for 15-30 seconds to engorge veins
7. Palpation - Vein should be soft, bouncy, refills after depression, well-supported by surrounding tissue
8. Skin Disinfectant - Allow to dry for 30 seconds
9. Assemble blood collection device, expose needle
10. Apply traction to skin a few cm distal to needle insertion site
11. Insert needle - bevel facing up, at 15-30° angle; once in vein (decreased resistance), reduce angle and advance 3-5 mm further
12. Hold device with non-dominant hand; use dominant hand to pull plunger or insert/release vacuum tubes

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3. Needle Withdrawal & Venipuncture Procedure Guide

Withdrawal Steps:

• Release tourniquet → apply gauze over entry site → withdraw needle
• ALWAYS release tourniquet BEFORE withdrawing needle
• Cover with safety needle cover OR immediately place in sharps container
• Keep arm straight; apply direct pressure on gauze for at least 5 minutes

Vacuum Tube System Diagram:

Quick Reference Procedure Guide (Illustrated):

1. Gather equipment, wash hands, sterile gloves
2. Ask patient to make fist; select venipuncture site in antecubital fossa
3. Disinfect with 70% alcohol swab - center outward
4. Apply tourniquet ~3-4 inches above site
5. Anchor vein with thumb and index finger
6. Position needle at 30° angle, enter vein swiftly
7. After collection, release tourniquet before withdrawing needle
8. Apply gauze/cotton ball; patient holds in place
9. Invert tube 8-10 times to mix sample with additives
10. Discard needle in sharps container
11. Remove gloves, wash hands
12. Label tube: patient's full name, patient ID, birth date, date of sample

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4. Butterfly Needle & Order of Draw

Butterfly Needle (Scalp Vein Set / Winged Infusion Set):

• Very thin needle + two flexible "wings" + flexible transparent tubing + connector
• Used for: superficial, small, or narrow veins (infants, elderly)
• Good for repeated short-term injection or small volume drug delivery
• Less traumatic

Scalp Veins in Infants:

• Frontal vein, occipital vein, superficial temporal vein, posterior auricular vein

Order of Draw (to avoid cross-contamination):

Blood culture bottles are ALWAYS drawn before any colored tube.

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5. Blood Collection Tubes (Vacutainers)

• Whole blood
• Plasma analysis
• Serum analysis

Serum vs. Plasma:

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Key Memory Tips:

• Median cubital = #1 choice (stable, accessible)
• Basilic = avoid (near brachial nerve/artery)
• Bevel up, 15-30° for needle insertion
• Release tourniquet BEFORE withdrawing needle
• Invert 8-10× after collection
• Order of Draw: BC → Citrate → Serum → Heparin → EDTA → Glycolytic → OthersThis appears to be a fibula (the smaller bone of the lower leg). Here is a detailed anatomical identification from the three views shown:

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Bone Identification: Fibula

Key Identifying Features Visible in the Photos:

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Anatomy of the Fibula

Head of fibula (proximal) ←── rounded, slightly
       |                        cupped top
       |
    Neck
       |
    Shaft ←────────────────── slender, twisted,
       |                       with a lateral bow
       |
Lateral Malleolus ←─────── flared distal end
   (distal)                  forms ankle joint

Key Facts:

• Location: Lateral side of the lower leg, running parallel to the tibia
• Primary role: Does NOT bear significant body weight (only ~10%) - mainly a muscle attachment site
• Joints formed:
  • Proximal tibiofibular joint (top)
  • Distal tibiofibular joint + ankle (lateral malleolus forms the lateral wall of the ankle mortise)
• Clinical importance: Most commonly fractured bone at the lateral malleolus (ankle sprain/fracture)
• Surgical use: Frequently harvested as a bone graft (free fibula flap) for jaw/mandible reconstruction

Why NOT a Tibia?

Why NOT a Radius/Ulna?

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Bone Identification: Radius (Right Side)

Why It's the Radius - Key Features:

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Why I Initially Confused It:

• Radius: Small end (head) on top, wide end on bottom
• Fibula: Has a rounded head on top but the distal end (lateral malleolus) is also fairly narrow
• The radial head's perfectly circular disc shape is the giveaway

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Full Anatomy of the Radius:

Radial Head (proximal) ←── small, circular disc
       |
    Radial Neck
       |
Radial Tuberosity ←──────── biceps tendon attachment
       |
    Shaft ←─────────────── lateral bow, interosseous
       |                    border (faces ulna)
       |
  Distal End ←────────────── WIDE: articulates with
  • Styloid process           scaphoid & lunate (wrist)
  • Carpal articular surface  (radiocarpal joint)

Key Clinical Points:

• Most commonly fractured bone in the body
• Colles' fracture - distal radius fracture with dorsal displacement ("dinner fork" deformity) - fall on outstretched hand
• Smith's fracture - distal radius with volar displacement (reverse Colles')
• Radial head fracture - most common elbow fracture in adults
• Nursemaid's elbow (pulled elbow) - radial head subluxation in children

Articulations:

1. Proximally - Radial head with capitulum of humerus (elbow)
2. Proximal radioulnar joint - with radial notch of ulna
3. Distally - with scaphoid and lunate (wrist joint)
4. Distal radioulnar joint - with ulnar notch of radius

Side Determination:

• The bowing curves laterally (away from the ulna)
• The styloid process at the distal end points to confirm which side (right vs left)

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