I'm a first year adult nursing student in s. of England. Would really appreciate any help with these questions (trying to complete my drug calculations booklet!!).
1) PATIENT PRESCRIBED SOLUBLE INSULIN 100 UNITS IN 5O ML 0.9% SODIUM CHLORIDE SET AT AN INFUSION RATE OF 6MLS PER HOUR. HOW MANY UNITS OF INSULIN WILL PATIENT RECEIVE EACH HOUR- CALCULATE FLOW RATE AS ML/HR.
2)PATIENT PRESCRIBED 40,000 UNITS OF HEPARIN OVER 24 HOURS. THE VIAL OF HEPARIN IS 25000 UNITS/ML AND YOU'RE ASKED TO DILUTE THE HEPARIN IN NaCl 0.9% TO RUN AT 1ML/HR. a) what volume of heparin do you draw up?
b) how much sodium chloride do you add to the heparin to infuse 40,000 units over 24 hours?
3) PATIENT PRESCRIBED 60mmol K+ IN 500MLS NaCl TO BE GIVEN OVER 3HOURS. HOW MANY mmol OF K+ WILL PATIENT RECEIVE EACH HOUR?
I'm a first year adult nursing student in s. of England. Would really appreciate any help with these questions (trying to complete my drug calculations booklet!!).
1) PATIENT PRESCRIBED SOLUBLE INSULIN 100 UNITS IN 5O ML 0.9% SODIUM CHLORIDE SET AT AN INFUSION RATE OF 6MLS PER HOUR. HOW MANY UNITS OF INSULIN WILL PATIENT RECEIVE EACH HOUR- CALCULATE FLOW RATE AS ML/HR.
i cross multiply
if 100u=50ml
Xu=6ml
so 6*100 /50 =12
2)PATIENT pRESCRIBED 40,000 UNITS OF HEPARIN OVER 24 HOURS. THE VIAL OF HEPARIN IS 25000 UNITS/ML AND YOU'RE ASKED TO DILUTE THE HEPARIN IN NaCl 0.9% TO RUN AT 1ML/HR. a) what volume of heparin do you draw up?
25000= 1
40000=x
40000*1/25000 =1.6 ml
b) how much sod ium chloride do you add to the heparin to infuse 40,000 units over 24 hours?
1m/hr = 24ml-1.6= 22.4ml
3) PATIENT PRESCRIBED 60mmol K+ IN 500MLS NaCl TO BE GIVEN OVER 3HOURS. HOW MANY mmol OF K+ WILL PATIENT RECEIVE EACH HOUR?
:yeah: 
Savonarola
54 Posts
I can recommend 2 formulars from an NCLEX preparation book, the always do work!
1) D:HxQ=X
D= doctor's order
H=dose on hand (from drug label)
Q=quantitiy (for ex. ml)
X= how many tablets to give or ml/hour
2) V:Txdrop factor=gtt/min
V=volume in ml = doctor's order
T=time in minutes
drop factor= depends on drop set used