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Back to urology tests

Urinanalysis

Normal Ranges

Specific gravity

Normal range: 1.003-1.029

pH

Normal range: 4.5-7.8

Protein

Normal range: Negative / trace (in concentrated urine)

Glucose

Normal range: Negative

Ketones

Normal range: Negative

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Bilirubin

Normal range: Negative

Occult blood

Normal range: Negative

Leukocyte esterase

Normal range: Negative

Nitrite

Normal range: Negative

Urobilinogen

Normal range: 0.1-1.0 EU/dL

WBCs

Normal range: 0-4/hpf

RBCs

Normal range: 0-2 RBCs/hpf

Casts

Normal range: 0-4/lpf hyaline

Bacteria

Normal range: Negative

hpf = high power field; lpf = low power field; EU = Ehrlich units.

Microscopic examination

Crystalluria

1. Calcium oxalate crystals: may occur with high intake of dietary oxalate (gelatin, strawberries, pepper, rhubarb, beans, beets, tomatoes, spinach, chocolate, cocoa, tea, pecans, peanuts, lime peel, okra. Excretion is increased by vitamin C intake ). It may also occur with malabsorption, pyridoxine deficiency and ethylene glycol intoxication.

2. Uric acid crystals: Occurs due to hyperurcemia.

3. Calcium phosphate crystals:

4. Cystine crystals: This happens due to cystinuria. Cystinuria is a disorder in which jejunal transport of dibasic amino acids (including the amino acid cystine) is defective in addition to excessive loss in urine. Clinical disease occurs due to the formation of cystine stones.

5. Triple phosphate crystals (Calcium magnesium ammonium phosphate): These are are usually associated with urine infected by urea splitting bacteria which cause "infection", or "triple phosphate" infection, or triple phosphate stones.

6. Indivavir crystals: are found in more than 30% of patients treated by this protease inhibitor.

Leukocyturia

Indicates inflammatory disease in the genito-urinary tract.

White cell casts

Indicates the renal origin of leukocytes (acute pyelonephritis).

Red cell casts

Indicate the renal origin of hematuria (glomerulonephritis).

Hyaline casts

Physiologic or due to many types of renal disease.

Epithelial (tubular) casts

They suggest tubular injury as in acute tubular necrosis. They may also be found in eclampsia, heavy metal poisoning, ethylene glycol intoxication and acute allograft rejection.

Granular casts

Fine granulations - Exercise and in a variety of glomerular and tubulointerstitial diseases.

Coarse granulations - Renal disease (acute tubular necrosis).

Waxy casts

Chronic renal failure.

Fatty casts (lipiduria)

Nephrotic syndrome

Broad casts

Also known as renal failure casts. These originate from dilated chronically damaged tubules or collecting ducts. They can be granular or waxy.

Spermatozoa

Retrograde ejaculation.

 

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