Medical dosage question

[dm61]

I am having the hardest time with this question.

A child BSA is 1.1 M2. If a prescribed drug is ordered at 45/mg/m2 PO, how many milligrams of the drug should the child receive?

Can someone show me how to do this problem? The BSA is confusing me, do I compare with an adults?

[emtb2rn, BSN, RN, EMT-B]

bsa based? Seriously? Yeeesh. Never had a med question like that in school and never seen a dosage ordered like that in the er. All kid dosages are weight based in kgs. You may want to cross post in the nicu/picu forums. Good luck

[Esme12, ASN, BSN, RN]

Medication Dose

Multiply BSA m² x Dose/m²

equals

Body Surface Area BSA calculator medication doses great source!

They are messing with you.......it is still you need to give x amount for this weight.

http://www.dosagehelp.com/dosage_by_weight.html

http://www.germanna.edu/tutor/Handouts/Nursing/Drug Dosage Calculation Packet.pdf

http://www.davesems.com/files/drug_dose_calculations.pdf

[MattNurse, MSN, RN]

1.1 M2 x45mg/m2 = (1.1x45)mg =49.5mg

m2 is you denominator and numerator so they cancel each other out and milligrams is left in your numerator for the answer

[NCRNMDM, ASN, RN]

the question basically tells you how to work the problem out. think about it this way: you need to administer 45 mg per every 1 meter squared of body area. this child has a body surface area of 1.1 meters squared. you know that you are giving more than 45 mg, you just have to figure out how much more.

there are two ways to do this. the first, and simplest, goes like this: 45 mg/m2 x 1.1 m2= 49.5 mg.

the second, and slightly more complicated way, to do this goes like this: (45 mg x 1 m2) + (45 mg x 0.1 m2)= 45 mg + 4.5 mg= 49.5 mg.

[KelRN215, BSN, RN]

bsa based? Seriously? Yeeesh. Never had a med question like that in school and never seen a dosage ordered like that in the er. All kid dosages are weight based in kgs. You may want to cross post in the nicu/picu forums. Good luck

Chemotherapy is based on body surface area in pediatrics. MOST kid dosages are weight based in kg, chemo is definitely based on the BSA.