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

Exercise 30

Synovial fluid crystals associated with inflammation in dialysis patients are:

A. Calcium pyrophosphate dihydrate

B. Calcium oxalate

C. Corticosteroid

D. Monosodium urate

Step 1 of 2

Synovial fluid crystals:

Synovial or movable joints have a hollow space filled with viscous fluid termed as synovial or joint fluid.

• Synovial fluid analysis in the laboratory is frequently performed to analyze the parameters such as white blood cells (WBC) count, differential, gram stain, culture, and crystal formation examination.

• From the above parameters crystal formation identification is an essential diagnostic test used to evaluate arthritis.

• There are two types of crystals visible in synovial fluid. They are,

o Monosodium urate (uric acid)

o Calcium pyrophosphate dihydrate.

• The following are some of additional crystals seen in synovial fluid and their functions:

o Cholesterol is a synovial fluid crystal related with chronic inflammation.

o Calcium pyrophosphate is a synovial fluid crystal related with degenerative arthritis.

o Apatite is a synovial fluid crystal related with calcified cartilage degeneration.

o Calcium oxalate is a synovial fluid crystal related with inflammation in renal dialysis patients.

Therefore, “Calcium oxalate” is a synovial fluid crystal related with inflammation in renal dialysis patients. Hence, the correct answer is option .