SYNOVIAL FLUID ANALYSIS CLASSES

Question 1

name this class?

clear/yellow color
transparent clarity
high viscosity 
firm mucin clot 
WBC < 2000
differential < 25% PMNS
negative culture

Answer 1

class I (non inflammatory)

Question 2

examples of class I?

Answer 2

OA
traumatic arthritis
osteonecrosis

Question 3

name this class?

yellow/white color
transparent/opaque clarity
variable viscosity
variable mucin clot
WBC count 2000-100,000
differential >50% PMNs
negative culture

Answer 3

class II (inflammatory)

Question 4

examples of class II?

Answer 4

RA
SLE
poly/dermatmyositis
scleroderma
calcium pyrophosphate
seronegative arthropathies

Question 5

name this class?

yellow/white color
opaque clarity
low viscosity
friable mucin clot
WBC count >100,000
differential >95% PMNs
positive culture

Answer 5

class III (septic)

Question 6

examples of class III?

Answer 6

bacterial arthritis

Question 7

name this class?

red color
opaque clarity
viscosity, mucin clot, WBC count, differential N/A
variable culture

Answer 7

class IV (hemorrhage)

Question 8

examples of class IV?

Answer 8

trauma
pigmented villonodular synovitis
tumor
coagulopathy
charcots arthropathy