Lab
Urine pH
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Urine pH
Normal
4.5-8.0 (usually 5.5 to 6.5)
Background
Urine pH reflects serum pH except with RTA
In
Renal Tubular Acidosis
(RTA), Urine pH >5.5
Urine cannot be acidified despite acid load
Increased (Alkalotic urine)
Stale ammoniacal sample (Very high pH)
Void testing if old sample
Bacteriuria
Reflects urea splitting organisms
Associated with
Magnesium
-ammonium phosphate crystals
Vegetarian diet
High citrate diet
Renal Failure
Drugs
Antibiotics
Bicarbonate
Acetazolamide
Decreased (Acidic urine)
Acidosis
Diabetes Mellitus
Starvation
Diarrhea
Uric Acid Calculi
Acidic fruits (Cranberry)
Drugs
Ammonium chloride
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