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Pharmacology

Sent to Health Experts August 28 08:54 PM

I am taking a test in Pharmacology. The question is "Your pt is an 83 year old female who weighs 122#. You want to start her on Bactrim. Her serum creatine is 1.6. What is her creatinine clearance?" How do I figure this out? Thank you.

 

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August 28 9:48 PM (53 minutes and 55 seconds later)
         
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There is a formula which can be used to calculate (estimate) creatinine clearance based on age, weight, creatinine, and sex.
Est. Creatinine Clearance =
[[140 - age(yr)]*weight(kg)]/[72*serum Cr(mg/dL)]
This is a good formula to keep written down if you are taking a pharmacology course.

Here is a link that does the math for you
In your specific question
122 pound, 83 year old, female, 1.2 creatinine = 31ml/min

Calculate Creatinine Clearance


Edited by FamilyPhysician on August 28 2006 at 9:49 PM

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