2.5 Synovial Fluid (Differential Diagnosis of Join Disorders)

Question 1

Lab findings

Viscosity (Rope test): Solid Clot (Good)
Glucose: N
WBCs/uL: <1000
PMN (%): <30

a. Non-Inflammatory
b. Inflammatory immunologic Crystal-induced
c. Septic
d. Hemorrhagic

Answer 1

a

Question 2

Lab findings

Viscosity (Rope test): Low
Glucose: N
WBCs/uL: Same as blood
PMN (%): <50

a. Non-Inflammatory
b. Inflammatory immunologic Crystal-induced
c. Septic
d. Hemorrhagic

Answer 2

d

Question 3

Lab findings

Viscosity (Rope test): No clot (Poor), Low
Glucose: Decrease
WBCs/uL: 2K - 75K / up to 100k
PMN (%): >50 / <70

a. Non-Inflammatory
b. Inflammatory immunologic Crystal-induced
c. Septic
d. Hemorrhagic

Answer 3

b

Question 4

Lab findings

Viscosity (Rope test): Variable
Glucose: Decrease
WBCs/uL: 50K - 100K
PMN (%): >75

a. Non-Inflammatory
b. Inflammatory immunologic Crystal-induced
c. Septic
d. Hemorrhagic

Answer 4

c