Test for proteinuria (Test for protein in urine ) / Heat and acetic acid test
Apparatus
Test tube, Acetic acid, Candle, Lighter, Test tube holder, Dropper, Urine.
Principle
Heat causes coagulation of protein.
Procedure
- Take 5ml test tube.
- Fill 2/3 with urine.
- Now acidify urine by the adding a few drops of 3% acetic acid, if urine is alkaline.
- Boil upper portion for two minutes ( boil upper portion because it can compare with the lower portion ).
- If turbidity appears, add a few drops of 3% acetic acid
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Test for proteinuria |
Results
If present...
- No cloudiness = Negative
- Faint cloudiness = Traces ( less than 0.1 g/dl ).
- Cloudiness without granularity = + ( 0.1 g /100ml ).
- Granular cloudiness = ++ ( 0.1 - 0.2 g / 100ml ).
- Precipitation and flocculation = +++ ( 0.2 -0.4 g/100ml ).
- Thick solid precipitation = ++++ ( more than 0.5 g/100ml ).
Causes
Normally less than 150 mg/day protein comes with/in urine.
Mild proteinuria ( less than 1.0 gm/day ) occur in...
- Hypertension
- Polycystic kidney
- Chronic pyelonephritis
- UTI
- Fever
Moderate proteinuria ( 1-3 gm/day ) is seen in...
- Chronic glomerulonephritis
- Nephrosclerosis
- Multiple myeloma
- Pyelonephritis
Heavy proteinuria ( more than 3gm/day ) occur due to...
- Nephrotic syndrome
- Renal vein thrombosis
- Diabetes mellitus
- SLE
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