Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 21

Differentiate maternal urine from amniotic fluid.

Step 1 of 2

Differentiating amniotic fluid and maternal urine

It is necessary to differentiate amniotic fluid and maternal urine because, the accidental puncture of the maternal bladder can be detected during specimen collection.

The following are the difference between amniotic fluid and maternal urine using the chemical analysis of creatinine, urea, glucose, and protein.

Chemicals	Amniotic fluid	Maternal urine
Creatinine	Less than 3.5 mg/dL (Milligrams per Deciliter)	High as 10 mg/dL
Urea	Less than 30 mg/dL	High as 300 mg/dL
Glucose	Associated with amniotic fluid	Not a common constituent of urine
Protein	Associated with amniotic fluid	Not a common constituent of urine