Calculator

Weight: 10 kgAge: 1 years
Weight:
Age:
Units:

Common Formulations

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Essentials
• Adrenaline
IV: 10 mcg/kg
100 mcg
• Atropine
IV: 20 mcg/kg
200 mcg
• Suxamethonium
IV: 2 mg/kg
20 mg
IM: 4 mg/kg
40 mg
neat: 100 mg / 2 mL
0.8 mL
• Defibrillation
4 J/kg
40 J
Airway
• ETT Size
(age / 4) + 3.5 (cuffed)
4
(age / 4) + 4.0 (uncuffed)
4.5
• ETT Depth
ETT * 3
13.5 cm
(age/2) + 12
12.5 cm
• LMA Size
-
2.0
• Laryngoscope
-
Miller 1
Weight
• Estimated Weight
APLS 4: (age + 4) * 2
10 kg
APLS 5: (age x 2) + 8
10 kg
• Measured Weight
-
10 kg
Arrest
• Adrenaline
IV: 10 mcg/kg
100 mcg
• Atropine
IV: 20 mcg/kg
200 mcg
• Bicarbonate (HyperK, TCA, MA, Prolonged (15 mins)
IV: 1 mmol/kg
10 mmol
• Magnesium 50% (Torsades pVF, hypoK, refractory VF/VT
IV: 0.1 mL/kg
1 mL
Antiarrhythmics
• Amiodarone
IV: 5 mg/kg
50 mg
• Adenosine
IV: 0.1 mg/kg
1 mg
IV: 0.2 mg/kg
2 mg
Antidotes
• Dantrolene
IV: 2.5 mg/kg
25 mg
(20 mg vial / 60 mL = 3 mg/mL
8 mL)
Antibiotics
• Cefazolin
IV: 25 mg/kg
250 mg
Antidotes
• Dantrolene
IV: 2.5 mg/kg
25 mg
(20 mg vial / 60 mL = 3 mg/mL
8 mL)
• Intralipid 20%
IV: 1.5 mL/kg
15 mL
• Naloxone
IV: 10 mcg/kg
100 mcg
Anticonvulsants
• Midazolam
IV: 0.15 mg/kg
2 mg
IM: 0.15 mg/kg
2 mg
Buccal: 0.3 mg/kg
3 mg
• Phenytoin
IV: 20 mg/kg
200 mg
• Levetiracetam
IV: 40 mg/kg
400 mg
Antiemetics
• Dexamethasone
IV: 0.15 mg/kg
2 mg
• Ondansetron
IV: 0.15 mg/kg
2 mg
Blood Products
• Packed Red Cells
IV: 10 mL/kg
100 mL
• FFP / ELP
IV: 10 mL/kg
100 mL
• Cryoprecipitate
IV: 5 mL/kg
50 mL
• Platelets
IV: 10 mL/kg
100 mL
• TXA
IV: 15 mg/kg
150 mg
• Calcium Chloride 10% = 0.68 mmol/mL
IV: 0.2 mL/kg
2 mL
Electricity
• Cardioversion
0.5 J/kg
5 J
• Defibrillation
4 J/kg
40 J
Standard Induction
• Propofol
IV: 2 mg/kg
20 mg
IV: 4 mg/kg
40 mg
• Rocuronium
IV: 0.6 mg/kg
6 mg
IV: 1 mg/kg
10 mg
Adjuncts
• Clonidine
IV: 1 mcg/kg
10 mcg
IV: 0.5 mcg/kg
5 mcg
• Remifentanil
IV: 1 mcg/kg
10 mcg
Infusion: 0.1 mcg/kg/min
1 mcg/min
Infusion: 0.2 mcg/kg/min
2 mcg/min
Infusion: 0.3 mcg/kg/min
3 mcg/min
• Dexmedetomidine
IV: 0.5 mcg/kg
5 mcg
IV: 0.3 mcg/kg
3 mcg
Infusion: 0.2 mcg/kg/hr
2 mcg/hr
Infusion: 0.3 mcg/kg/hr
3 mcg/hr
Infusion: 0.5 mcg/kg/hr
5 mcg/hr
Analgesia
• Fentanyl
IV: 1 mcg/kg
10 mcg
IV: 0.5 mcg/kg
5 mcg
• Oxycodone
IV: 0.05 mg/kg
1 mg
IV: 0.1 mg/kg
1 mg
• Paracetamol
IV: 15 mg/kg
150 mg
PO: 15 mg/kg
150 mg
• Ibuprofen
IV: 10 mg/kg
100 mg
• Parecoxib
IV: 0.5 mg/kg
5 mg
IV Fluids
• IVF Bolus
IV: 10 mL/kg
100 mL
IV: 20 mL/kg
200 mL
• IVF Maintenance
4:2:1
40 mL/hr
NMBA
• Suxamethonium
IV: 2 mg/kg
20 mg
IM: 4 mg/kg
40 mg
neat: 100 mg / 2 mL
0.8 mL
• Rocuronium
IV: 0.6 mg/kg
6 mg
IV: 1 mg/kg
10 mg
• Vecuronium
IV: 0.1 mg/kg
1 mg
Glucose
• Insulin
IV: 0.1 iu/kg
1 iu
Infusion: 0.02 iu/kg/hr
0 iu/hr
Infusion: 0.5 iu/kg/hr
5 iu/hr
• Glucose 5% = 5 g / 100 mL = 0.05 g/mL
IV: 4 mL/kg
40 mL
Infusion: 0.1 g/kg/hr
1 g/hr
• Glucose 10% = 10 g / 100 mL = 0.1 g/mL
IV: 2 mL/kg
20 mL
Infusion: 0.1 g/kg/hr
1 g/hr
• Glucose 50% = 50 g / 100 mL = 0.5 g/mL
IV: 0.4 mL/kg
4 mL
Infusion: 0.1 g/kg/hr
1 g/hr
Hypnotic
• Propofol
IV: 2 mg/kg
20 mg
IV: 4 mg/kg
40 mg
• Thiopentone
IV: 5 mg/kg
50 mg
500 mg / 20 mL = 25 mg/mL
2 mL
IV: 3 mg/kg
30 mg
500 mg / 20 mL = 25 mg/mL
1.2 mL
IV: 1 mg/kg
10 mg
500 mg / 20 mL = 25 mg/mL
0.4 mL
Premedication
• Midazolam
PO: 0.5 mg/kg
5 mg
IV: 0.1 mg/kg
1 mg
• Ketamine
PO: 2 mg/kg
20 mg
PO: 3 mg/kg
30 mg
IM: 5 mg/kg
50 mg
• Clonidine
PO: 3 mcg/kg
30 mcg
Raised ICP
• Mannitol 20% = 20 g / 100 mL = 1 g / 5 mL = 0.2 g/mL
IV: 0.5 g/kg = 2.5 mL/kg
25 mL
IV: 1 g/kg = 5 mL/kg
50 mL
• 3% NaCl = Hypertonic Saline
IV: 3 mL/kg
30 mL
• Thiopentone
IV: 5 mg/kg (Max)
50 mg
IV: 1.25 mg/kg (1/4 Max)
12.5 mg
• Propofol
IV: 2 mg/kg (Max)
20 mg
IV: 0.5 mg/kg (1/4 Max)
5 mg
Vasopressor
• Metaraminol
IV: 5 mcg/kg
50 mcg
IV: 10 mcg/kg
100 mcg
Reversal
• Sugammadex
IV: 2 mg/kg
20 mg
IV: 4 mg/kg
40 mg
IV: 16 mg/kg
160 mg
• Neostigmine
IV: 50 mcg/kg
500 mcg
• Glycopyrrolate
IV: 10 mcg/kg
100 mcg
• Atropine
IV: 20 mcg/kg
200 mcg
Essentials
• Adrenaline
IV: 10 mcg/kg
100 mcg
• Atropine
IV: 20 mcg/kg
200 mcg
• Suxamethonium
IV: 2 mg/kg
20 mg
IM: 4 mg/kg
40 mg
neat: 100 mg / 2 mL
0.8 mL
• Defibrillation
4 J/kg
40 J
Airway
• ETT Size
(age / 4) + 3.5 (cuffed)
4
(age / 4) + 4.0 (uncuffed)
4.5
• ETT Depth
ETT * 3
13.5 cm
(age/2) + 12
12.5 cm
• LMA Size
-
2.0
• Laryngoscope
-
Miller 1
Weight
• Estimated Weight
APLS 4: (age + 4) * 2
10 kg
APLS 5: (age x 2) + 8
10 kg
• Measured Weight
-
10 kg
Arrest
• Adrenaline
IV: 10 mcg/kg
100 mcg
• Atropine
IV: 20 mcg/kg
200 mcg
• Bicarbonate (HyperK, TCA, MA, Prolonged (15 mins)
IV: 1 mmol/kg
10 mmol
• Magnesium 50% (Torsades pVF, hypoK, refractory VF/VT
IV: 0.1 mL/kg
1 mL
Standard Induction
• Propofol
IV: 2 mg/kg
20 mg
IV: 4 mg/kg
40 mg
• Rocuronium
IV: 0.6 mg/kg
6 mg
IV: 1 mg/kg
10 mg
Adjuncts
• Clonidine
IV: 1 mcg/kg
10 mcg
IV: 0.5 mcg/kg
5 mcg
• Remifentanil
IV: 1 mcg/kg
10 mcg
Infusion: 0.1 mcg/kg/min
1 mcg/min
Infusion: 0.2 mcg/kg/min
2 mcg/min
Infusion: 0.3 mcg/kg/min
3 mcg/min
• Dexmedetomidine
IV: 0.5 mcg/kg
5 mcg
IV: 0.3 mcg/kg
3 mcg
Infusion: 0.2 mcg/kg/hr
2 mcg/hr
Infusion: 0.3 mcg/kg/hr
3 mcg/hr
Infusion: 0.5 mcg/kg/hr
5 mcg/hr
Analgesia
• Fentanyl
IV: 1 mcg/kg
10 mcg
IV: 0.5 mcg/kg
5 mcg
• Oxycodone
IV: 0.05 mg/kg
1 mg
IV: 0.1 mg/kg
1 mg
• Paracetamol
IV: 15 mg/kg
150 mg
PO: 15 mg/kg
150 mg
• Ibuprofen
IV: 10 mg/kg
100 mg
• Parecoxib
IV: 0.5 mg/kg
5 mg
Antiarrhythmics
• Amiodarone
IV: 5 mg/kg
50 mg
• Adenosine
IV: 0.1 mg/kg
1 mg
IV: 0.2 mg/kg
2 mg
Antidotes
• Dantrolene
IV: 2.5 mg/kg
25 mg
(20 mg vial / 60 mL = 3 mg/mL
8 mL)
Antibiotics
• Cefazolin
IV: 25 mg/kg
250 mg
Antidotes
• Dantrolene
IV: 2.5 mg/kg
25 mg
(20 mg vial / 60 mL = 3 mg/mL
8 mL)
• Intralipid 20%
IV: 1.5 mL/kg
15 mL
• Naloxone
IV: 10 mcg/kg
100 mcg
Anticonvulsants
• Midazolam
IV: 0.15 mg/kg
2 mg
IM: 0.15 mg/kg
2 mg
Buccal: 0.3 mg/kg
3 mg
• Phenytoin
IV: 20 mg/kg
200 mg
• Levetiracetam
IV: 40 mg/kg
400 mg
Antiemetics
• Dexamethasone
IV: 0.15 mg/kg
2 mg
• Ondansetron
IV: 0.15 mg/kg
2 mg
Blood Products
• Packed Red Cells
IV: 10 mL/kg
100 mL
• FFP / ELP
IV: 10 mL/kg
100 mL
• Cryoprecipitate
IV: 5 mL/kg
50 mL
• Platelets
IV: 10 mL/kg
100 mL
• TXA
IV: 15 mg/kg
150 mg
• Calcium Chloride 10% = 0.68 mmol/mL
IV: 0.2 mL/kg
2 mL
Electricity
• Cardioversion
0.5 J/kg
5 J
• Defibrillation
4 J/kg
40 J
IV Fluids
• IVF Bolus
IV: 10 mL/kg
100 mL
IV: 20 mL/kg
200 mL
• IVF Maintenance
4:2:1
40 mL/hr
NMBA
• Suxamethonium
IV: 2 mg/kg
20 mg
IM: 4 mg/kg
40 mg
neat: 100 mg / 2 mL
0.8 mL
• Rocuronium
IV: 0.6 mg/kg
6 mg
IV: 1 mg/kg
10 mg
• Vecuronium
IV: 0.1 mg/kg
1 mg
Glucose
• Insulin
IV: 0.1 iu/kg
1 iu
Infusion: 0.02 iu/kg/hr
0 iu/hr
Infusion: 0.5 iu/kg/hr
5 iu/hr
• Glucose 5% = 5 g / 100 mL = 0.05 g/mL
IV: 4 mL/kg
40 mL
Infusion: 0.1 g/kg/hr
1 g/hr
• Glucose 10% = 10 g / 100 mL = 0.1 g/mL
IV: 2 mL/kg
20 mL
Infusion: 0.1 g/kg/hr
1 g/hr
• Glucose 50% = 50 g / 100 mL = 0.5 g/mL
IV: 0.4 mL/kg
4 mL
Infusion: 0.1 g/kg/hr
1 g/hr
Hypnotic
• Propofol
IV: 2 mg/kg
20 mg
IV: 4 mg/kg
40 mg
• Thiopentone
IV: 5 mg/kg
50 mg
500 mg / 20 mL = 25 mg/mL
2 mL
IV: 3 mg/kg
30 mg
500 mg / 20 mL = 25 mg/mL
1.2 mL
IV: 1 mg/kg
10 mg
500 mg / 20 mL = 25 mg/mL
0.4 mL
Premedication
• Midazolam
PO: 0.5 mg/kg
5 mg
IV: 0.1 mg/kg
1 mg
• Ketamine
PO: 2 mg/kg
20 mg
PO: 3 mg/kg
30 mg
IM: 5 mg/kg
50 mg
• Clonidine
PO: 3 mcg/kg
30 mcg
Raised ICP
• Mannitol 20% = 20 g / 100 mL = 1 g / 5 mL = 0.2 g/mL
IV: 0.5 g/kg = 2.5 mL/kg
25 mL
IV: 1 g/kg = 5 mL/kg
50 mL
• 3% NaCl = Hypertonic Saline
IV: 3 mL/kg
30 mL
• Thiopentone
IV: 5 mg/kg (Max)
50 mg
IV: 1.25 mg/kg (1/4 Max)
12.5 mg
• Propofol
IV: 2 mg/kg (Max)
20 mg
IV: 0.5 mg/kg (1/4 Max)
5 mg
Vasopressor
• Metaraminol
IV: 5 mcg/kg
50 mcg
IV: 10 mcg/kg
100 mcg
Reversal
• Sugammadex
IV: 2 mg/kg
20 mg
IV: 4 mg/kg
40 mg
IV: 16 mg/kg
160 mg
• Neostigmine
IV: 50 mcg/kg
500 mcg
• Glycopyrrolate
IV: 10 mcg/kg
100 mcg
• Atropine
IV: 20 mcg/kg
200 mcg

Notes

Maximums used:

Lignocaine = Plain: 4.5 mg/kg, With Ad: 7 mg/kg
Ropivacaine = Plain: 3 mg/kg, With Ad: 3 mg/kg
Bupivacaine = Plain: 2.5 mg/kg, With Ad: 3 mg/kg

References

Local anesthetic systemic toxicity: current perspectives, Local Reg Anesth 2018

Local Anaesthetic Poisoning, Royal Childrens Hospital 2018