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

Exercise 23

How might a blood-streaked amniotic fluid affect the results of the following tests?

a. L/S ratio

b. AChE

c. Bilirubin analysis

d. Aminostat-FLM

Step 1 of 4

The following tests are affected by the specimen that is contaminated by blood.

a. Lecithin-Sphingomyelin Ratio:

The meconium or blood in the fluid due to contamination, produces falsely elevated results (false positive result) because both blood and meconium contains sphingomyelin and lecithin