References & Calculation Methodology

1. Primary Clinical References

All dosing algorithms, concentration standards, and clinical pathways directly cross-reference established medical literature:

2. Weight-Based Dosing Methodology

PaedsCalc computes single-dose requirements through strict multi-variable validation:

• Weight Input (kg): Entered directly or derived from age using validated pediatric growth formulas (e.g. (Age × 2) + 8 for toddlers aged 1–5 years).
• Weight-Tier Regimens: Formulations specify either mg/kg/dose (e.g. Paracetamol 15 mg/kg/dose Q6H) or mg/kg/day divided (e.g. Amoxicillin 30–40 mg/kg/day divided TDS).
• Dose Conversion: Dose (mg) = Weight (kg) × Regimen Target (mg/kg).
• Volume Conversion: Volume (mL) = Dose (mg) ÷ Concentration (mg/mL).

3. Hard Toxicity Ceilings (Maximum Doses)

To prevent accidental overdosing when applying linear weight-based calculations to older or overweight children, PaedsCalc enforces hard clinical ceilings:

• Paracetamol: Single dose capped at 1,000 mg; cumulative daily cap at 4,000 mg (or 60 mg/kg/day).
• Ibuprofen: Single dose capped at 400 mg; cumulative daily cap at 1,200 mg.
• Amoxicillin / Augmentin: Amoxicillin single component capped at 1,000 mg/dose.
• Adrenaline (1:1,000) IM Anaphylaxis: Capped at 0.3 mL (0.3 mg) for children <30 kg, and 0.5 mL (0.5 mg) for older children and adults.

4. Clinic Dispensing & Bottle Rounding Logic

Practical clinic administration requires translating milligram values into physical containers and measuring tools:

• Syringe Mark Visualization: Calibrated oral syringe indicators highlight the exact line to which a parent or caregiver should draw medication (e.g. 3.5 mL mark on a 5 mL syringe).
• Duration Defaults: Symptomatic syrups default to 3 days; antibiotic courses default to 5, 7, or 10 days.
• Bottle Pack Optimization: Total Volume = Dose (mL) × Daily Frequency × Duration (days). The engine evaluates commercially available Malaysian pack sizes (e.g. 60 mL, 90 mL, 100 mL, 120 mL bottles) to recommend the minimum complete bottle count without leaving the patient short.

5. Emergency Resuscitation Algorithms

Emergency calculations strictly reflect PALS / APLS resuscitation standards:

• Anaphylaxis: Intramuscular Adrenaline 1:1,000 at 0.01 mg/kg (0.01 mL/kg), drawn using a 1 mL syringe and administered strictly into the anterolateral thigh.
• Acute Status Epilepticus: Rectal Diazepam 0.5 mg/kg (max 10 mg), with pre-filled 5 mg tube (<12 kg / <3 yrs) and 10 mg tube (≥12 kg / ≥3 yrs) packaging guidelines.
• Hypovolemic Shock Fluid Resuscitation: Normal Saline 0.9% IV bolus at 20 mL/kg over 5–10 minutes (with automated Dengue Hemorrhagic Fever / Cardiac / Renal alert reducing bolus to 10 mL/kg).

6. Clinical Error Prevention & Safety Guardrails

Pediatric pharmacotherapy is uniquely vulnerable to 10× arithmetic calculation errors, fat-finger entry slips, and metric-imperial unit confusion. PaedsCalc incorporates three fundamental human-factors engineering principles:

• Strict Metric Locking (kg): PaedsCalc deliberately excludes imperial weight toggles (lbs). All inputs are permanently calibrated in kilograms (kg), completely preventing accidental 2.2× overdoses caused by unit mis-selection.
• Hard Toxicity Caps: Even in the event of an erroneous weight entry (e.g. typing 12 instead of 1.2 kg), hard physiological single-dose and daily ceilings protect patients from receiving adult-toxic quantities.
• WHO Growth & Age-Weight Reference: An integrated age-weight estimator allows prescribers to cross-reference entered weights against standard pediatric medians, ensuring plausibility before administering potent medications.
• Modular Cognitive Architecture: Outpatient syrup dispensing, emergency resuscitation protocols, and neonatal bilirubin plotting are isolated into distinct clinical workflows, eliminating information overload and visual fatigue during high-acuity consultations.