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

Exercise 22

Fluid:serum protein and lactic dehydrogenase ratios are performed on serous fluids:

A. When malignancy is suspected

B. To classify transudates and exudates

C. To determine the type of serous fluid

D. When a traumatic tap has occurred

Step 1 of 2

Serous fluid:

The fluid that is available between the serous membranes is named as serous fluid.

• It affords lubrication between parietal membrane and visceral membrane

• The tests are performed on serous fluid to determine whether the fluid is “transudates” or “exudates”

• The test includes the following ratios:

o Ratio between “fluid” and “serum protein”

o Ratio between “fluid” and “lactic dehydrogenase (LD)”

Therefore, the “fluid: serum protein” and “fluid: lactic dehydrogenase” ratio are carried out on serous fluids “to classify transudates and exudates”. Hence, the correct answer is option.