Hypertension Centile Chart (Blood Pressure by Age & Percentile)

Pediatric Blood Pressure Centile Chart (Age vs BP)

Definitions (Percentile-Based Classification)

Adults - Blood Pressure Classification

Key Clinical Points (Centile Chart Use Karne Ka Tarika)

1. Age + Height + Gender - Teen factors milake centile decide hoti hai pediatric patients mein
2. Kam se kam 3 occasions par elevated reading ho tabhi hypertension diagnose karein
3. Masked Hypertension - CKD children mein 35% tak hoti hai - clinic mein normal, ABPM par elevated
4. Therapeutic targets:
   • Non-proteinuric CKD: BP < 75th percentile
   • Proteinuric CKD: BP < 50th percentile
5. First-line drugs (children): ACE inhibitors ya ARBs (e.g., Ramipril 6 mg/m²/day, Candesartan 0.2-0.4 mg/kg/day)

Note: Aap kya poochh rahe the - pediatric centile chart ya adult hypertension classification chart? Agar koi specific age group, gender ya height ke liye detailed centile values chahiye hoon, batayein - main aur specific data provide kar sakta hoon.

🩺 Pediatric Hypertension - Complete Centile Chart

📊 TABLE 1: BP Classification by Age (AAP 2017 Guidelines)

Rule: Hamesha lower value use karein. Diagnosis ke liye 3 separate occasions par elevated BP chahiye.

📊 TABLE 2: BP Centile Values by Age & Gender (50th height %ile)

📊 TABLE 3: Common Causes of HTN by Age Group

⚠️ Hypertensive Emergency vs Urgency (Children)

💊 Treatment Targets & First-Line Drugs

🔑 Key Exam Points (Yaad Rakhein)

• Diagnosis: ≥ 95th percentile on 3 separate occasions (age + sex + height matched)
• Masked HTN: Clinic mein normal, ABPM par high - CKD children mein 35% tak
• ABPM (Ambulatory BP monitoring): Annually recommended in CKD children
• Nocturnal dipping attenuation - early marker of CV risk
• Most common cause of secondary HTN in children: Renal disease
• Adolescents mein: Essential HTN (obesity linked) most common

Puddle Sign - Elicitation Method

Kya Hai?

Step-by-Step Technique

Step 1 - Patient Position

    Head down
    [Patient on all fours]
    Umbilicus gravity ke neeche latkta hai

Step 2 - Wait

Step 3 - Stethoscope Place Karein

Step 4 - Percussion

Step 5 - Sound Change Note Karein

• Fluid present hai = Percussion sound dull hogi umbilicus ke paas, aur resonant flanks par
• Jab tap flank se umbilicus ki taraf aaye = stethoscope par sound suddenly louder/dull hoti hai jab fluid zone mein enter ho

Visual Diagram

        SIDE VIEW:
        
    ← Flank tap        Stethoscope →
    (Percussion)       (Umbilicus)
    
         Patient on all-fours:
         
    [Hand] [Knee]    [Knee] [Hand]
              \      /
               \    /
                \  /
            FLUID pools here
            (umbilicus hanging down)

Interpretation

Comparison: Ascites Signs

Key Points (Exam ke Liye)

• Puddle sign = most sensitive bedside test for minimal ascites
• Position: knee-elbow (all-fours) - NOT supine
• Gravity fluid ko umbilicus ke neeche pool karti hai
• Stethoscope = umbilicus ke neeche (lowest point)
• Percussion = flanks se inward ki taraf
• Positive = dullness note hona stethoscope ke paas
• Limitation: Obese patients mein difficult; requires patient cooperation

Puddle Sign - How to Elicit

What Is It?

Step-by-Step Technique

• Positive sign: Sound changes from resonant (at the flank) to dull as percussion moves toward the fluid-filled umbilical area
• Negative sign: Sound remains uniformly resonant throughout

Interpretation Table

Comparison of Ascites Signs

Key Exam Points

• Most sensitive bedside test for minimal/early ascites
• Patient position: knee-elbow (all-fours) - never supine
• Stethoscope goes below the umbilicus (lowest dependent point)
• Percussion moves flank inward toward umbilicus
• Limitation: Difficult in obese patients; patient must be cooperative enough to maintain the position

Febrile Seizure Recurrence - Risk Criteria

Overall Recurrence Rate

• ~30-40% of children will have at least one recurrence
• Multiple recurrences are infrequent
• (Bradley & Daroff's Neurology in Clinical Practice)

Risk Factors for Recurrence (Nelson's Criteria)

MAJOR Risk Factors

MINOR Risk Factors

Recurrence Risk Based on Number of Factors

Rule of thumb: Each additional risk factor roughly doubles the risk of recurrence.

Predictors of Later EPILEPSY (Not Just Recurrence)

Simple vs Complex Febrile Seizure - Quick Recap

Key Exam Points

• Most important single risk factor for recurrence: Young age at onset (< 1 year)
• Most important predictor of later epilepsy: Complex features + neurodevelopmental abnormality
• Febrile status epilepticus can injure the hippocampus - may lead to hippocampal sclerosis and temporal lobe epilepsy
• Dravet syndrome starts as febrile seizures (prolonged, asymmetric) - always suspect if onset < 1 year with SCN1A mutation
• GEFS+ (Genetic Epilepsy with Febrile Seizures Plus) - autosomal dominant, febrile seizures persist beyond age 6

Weech's Formula

📊 WEIGHT Formulas

Quick Examples:

• 2-year-old: (2 × 2) + 8 = 12 kg
• 10-year-old: (10 × 7 - 5) / 2 = 32.5 kg
• 6-month-old: (6 + 9) / 2 = 7.5 kg

📏 HEIGHT Formulas

Quick Examples:

• 2-year-old: (2 × 6) + 77 = 89 cm
• 5-year-old: (5 × 6) + 77 = 107 cm
• 10-year-old: (10 × 6) + 77 = 137 cm

🧠 HEAD CIRCUMFERENCE Formula

🔑 Key Growth Milestones to Remember (Alongside Weech)

📝 Comparison: Weech vs Other Formulas

Note: For emergency drug dosing (e.g., in resuscitation), the APLS formula [(Age + 4) × 2] is preferred over Weech. Weech is better for nutritional and developmental assessment.

Key Exam Points

• Weech formula is specifically for 1-6 years: Age × 2 + 8 (not +9 or +10 - common mistake)
• For 7-12 years: Use (Age × 7 - 5) / 2
• For 3-12 months: (Age in months + 9) / 2
• Height formula: Age × 6 + 77 (valid 2-12 years)
• These are ideal/expected values - actual weight ±20% is acceptable as normal range