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

Exercise 7

Fluid obtained from the knee of an obese 65-year-old woman being evaluated for a possible knee replacement has the following results:

APPEARANCE: Pale yellow and hazy

WBC COUNT: 500 cells/µL

GRAM STAIN: Negative

GLUCOSE: 110 mg/dL (serum glucose: 115 mg/dL)

a. What classification of joint disorder do these results suggest?

b. Under electron microscopy, what crystals might be detected?

c. How does the glucose result aid in the disorder classification?

Step 1 of 3

a.

Classification of joint disorders:

When analyzing the given data, the joint disorder condition is identified as “non-inflammatory”.

• Because, the WBC (White Blood Cell) counts in the given specimen is “500 cell s/µL”

• As per the laboratory findings of joint disorders, the level of WBC in “non-inflammatory” is less than “1000 µL”

o The given specimen contains only “500 cells/µL”

Therefore, the joint disorder in given case is identified as “non-inflammatory”.