Kidney function tests Flashcards
What are the kidney function tests?
- S Creatinine
2. S Urea or BUN
What is the normal value of S Urea?
15 - 40 mg/dl
How to change S Urea to BUN?
You have to divide by 2.14 to change S Urea to BUN
What are the factors affecting Serum Urea?
Photo
What are tests done to assess renal functions?
- S Urea or BUN
- S Creatinine
- 24 hr Creatinine Clearence
- Serum Cystatin
- Others like serum electrolytes, biopsy and US.
What is the normal value for S Creatinine? “Product of muscles”
Males: 0.8 - 1.3 mg/dl
Females: 0.6 - 1 mg/dl
What are the disadvantages of S Creatinine?
- Slow response at start
- is affected by photo
What is GFR?
Amount of plasma filtered per minute.
Normal value is less than 90 ml / min
What are the substances used in measuring GFR?
- Inulin
- 125l - iothalamate
- 51cr EDTA
- Creatinine “the only endogenous one”
What are the grades of renal failure?
Photo
How is a “24 Hr Creatinine Clearence” method done? And what are its disadvantages?
Collecting a 24 Hr urine sample, the disadvantages are that it is not very practical as it is hard and vulnerable to mistakes
Whi is testing for proteinuria important for assessment of renal functions?
For early detection of renal failure.
What are the types of proteinuria?
Micro proteinuria and macroproteinuria
What are the values of protein in urine in case of microproteinuria?
Protein: 150 - 500 mg / day
Albumin: 30 - 300 mg / day
What are the values of protein in urine in case of macroproteinuria?
Protein: >50mg / day
Albumin: >300mg / day
