Ans) Order: Magnesium sulphate 4 gram bolus to Infuse over 30 minutes.
Magnesium sulphate 2 every 1 hrly.
Available: 40 grams in 500 ml NS
Formula: ml/hr = volume of dose ÷ time in hr
= 500
40 gms= 500ml
4 gms= x
x = 4 × 500/40 = 50 ml
Appling to formula: 30 mins = 0.5 hr
ml/hr = 50/0.5= 100 ml/hr for bolus.
For 2 grams every hour
40 gms = 500 ml
2 gms = y
y= 2 × 500/ 40 = 25 ml
Applying to the formula:
ml/hr = 25/1 = 25 ml/hr.
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