Wednesday, September 2, 2009

Calculating the urinary microalbumin to creatinine ratio

One of my high volume referring doctors uses a lab which does not calculate the microalbumin to cr ratio. It always stops me in my tracks when I see the values.

  1. To convert microalbum and urine creatinine to the useful ratio first make sure both values are expressed as mg/L or mg/ml
  2. Divide the microalbumin concentration by the creatinine concentration
  3. Multiply the resulting ratio by 1,000 to get mg albumin over grams creatinine
For example a patient had the following labs:
Microalbumn urine 5.6 mg/dL
Creatinine urine 91.2 mg/dL
Dividing the albumin by cr gives: 0.061
Multiply that by 1,000 to get 61 mg albumin/g creatinine
Related Posts Plugin for WordPress, Blogger...