How much Aminoven to give neonate of 1.1kg
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Aminoven Infant neonatal dosing per kg parenteral nutrition
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I now have enough from the official Aminoven Infant 10% prescribing information to give a complete, accurate answer. The PI has the neonatal/preterm dosing data.
Aminoven Infant 10% Dosing for a 1.1 kg Neonate
Important safety note: This is a VLBW (very low birth weight) preterm neonate. All dosing must be confirmed with your unit's neonatology/pharmacy team and local TPN protocol before administration.
Product context
Aminoven Infant 10% contains 100 g amino acids per 1,000 ml (10 g/100 ml), so:
- 1 ml = 0.1 g amino acids
- 10 ml = 1 g amino acids
Neonatal/Preterm dosing (from the official prescribing information)
| Parameter | Value |
|---|---|
| Maximum infusion rate | 0.1 g amino acids/kg/hour = 1.0 ml/kg/hour |
| Starting dose (day 1-2) | 1.5-2.0 g/kg/day (general neonatal PN practice) |
| Target/maximum daily dose (neonate/infant) | 1.5-2.5 g amino acids/kg/day = 15-25 ml/kg/day |
Calculation for a 1.1 kg neonate
| Goal | g amino acids/day | Volume of Aminoven Infant 10%/day | Infusion rate |
|---|---|---|---|
| Starting (1.5 g/kg/day) | 1.1 × 1.5 = 1.65 g/day | 16.5 ml/day | ~0.69 ml/hour |
| Target (2.0 g/kg/day) | 1.1 × 2.0 = 2.2 g/day | 22 ml/day | ~0.92 ml/hour |
| Maximum (2.5 g/kg/day) | 1.1 × 2.5 = 2.75 g/day | 27.5 ml/day | ~1.15 ml/hour |
| Max infusion rate (hourly cap) | - | - | 1.1 ml/hour (= 1.0 ml/kg/hr × 1.1 kg) |
Key practical points
- Route: Central vein preferred (osmolarity ~885 mOsm/L - not suitable for peripheral vein alone)
- Light protection: Protect from ambient light during administration in neonates - photodegradation generates peroxides
- Stepwise increase: In VLBW neonates, most units start at 1.5-2.0 g/kg/day on day 1 and advance by 0.5-1.0 g/kg/day to a goal of 3.0-3.5 g/kg/day (the Aminoven PI gives up to 2.5 g/kg/day as its labeled maximum; some units target 3.0-3.5 g/kg/day using unit-specific protocols)
- Do not exceed the infusion rate of 1.0 ml/kg/hour (= 1.1 ml/hour for this baby)
- Aminoven Infant 10% must be combined with carbohydrates, lipids, vitamins, electrolytes, and trace elements for complete PN
- Contraindicated if: amino acid metabolic disorder, metabolic acidosis, hyperhydration, hyperkalaemia, severe renal/hepatic failure
Source: Aminoven Infant 10% approved prescribing information. Always cross-check with your local neonatal TPN protocol and pharmacy.
Sodium bicarbonate in neonate formula
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sodium bicarbonate neonatal dosing formula metabolic acidosis neonate
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Sodium Bicarbonate in Neonates - The Formula
The Standard Dosing Formula
The universally used formula for correcting metabolic acidosis in neonates is:
mmol NaHCO₃ = Base Deficit (mmol/L) × Body Weight (kg) × 0.3
- The factor 0.3 represents the bicarbonate distribution volume (30% of body weight) in neonates
- This gives the full correction dose
- Most guidelines recommend giving only a half correction first, then reassessing blood gas before giving more
So in practice most units use:
mmol NaHCO₃ = Base Deficit × Weight (kg) × 0.3 ÷ 2
(Pye's Surgical Handicraft; King Edward Memorial Hospital Neonatal Protocol)
Practical Example - 1.1 kg Neonate
If base deficit = -10 mmol/L:
- Full correction: 10 × 1.1 × 0.3 = 3.3 mmol
- Half correction (give first): 1.65 mmol = 1.65 ml of 8.4% solution
Available Preparations & Concentrations
| Preparation | Concentration | Volume to give per mmol |
|---|---|---|
| 8.4% NaHCO₃ | 1 mmol/ml | 1 ml per mmol |
| 4.2% NaHCO₃ | 0.5 mmol/ml | 2 ml per mmol |
In neonates and preterm infants, always use 4.2% (half-strength) or dilute 8.4% 1:1 with sterile water to reduce osmolarity and risk of intraventricular hemorrhage. Tintinalli's states: "In neonates or premature infants, dilute sodium bicarbonate 1:1..."
Indications for Use
| Situation | Threshold | Dose |
|---|---|---|
| Metabolic acidosis (elective correction) | pH < 7.2, Base Excess < -10, normal PCO₂ | 0.3 × weight × BD (half-correction) |
| Prolonged CPR (>10-15 min) | Severe metabolic acidosis confirmed on ABG | 1-2 mmol/kg of 4.2% over 30 min |
| Renal tubular acidosis (maintenance) | Chronic metabolic acidosis | 1-3 mmol/kg/day orally, titrated |
Administration
- IV correction of acidosis: Infuse over 2-8 hours (slower for smaller/more preterm babies)
- Emergency CPR dose: Over 30 minutes minimum
- Maximum rate: 10 mmol/minute (emergency only)
- Use a separate IV line where possible - incompatible with calcium, dopamine, and many other drugs
- Protect from light in neonates
Important Cautions
- Do NOT use in routine/acute resuscitation - current NRP guidelines do not recommend routine NaHCO₃ at delivery; it can worsen intracellular acidosis and generate CO₂ if ventilation is inadequate
- Never give undiluted 8.4% to a neonate - hyperosmolarity risks IVH
- Correct the underlying cause of acidosis (poor ventilation, sepsis, hypovolemia) first
- Always ventilate adequately before/during administration - CO₂ must be cleared
- Recheck ABG after half-correction before giving more
Sources: Pye's Surgical Handicraft (22nd Ed.); KEMH Neonatal Sodium Bicarbonate Protocol; West of Scotland Neonatal Drug Monograph; Tintinalli's Emergency Medicine.
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