AUBF-Lec-Synovial Fluid Flashcards
Synovial Fluid A.K.A
JOINT FLUID
“Synovial”=Latin word for
egg
Viscous fluid circulating in diarthroses (movable joints)
Synovial Fluid
Synovial Fluid: Viscous fluid circulating in?
diarthroses (movable joints)
Synovial Fluid: Viscosity is due to?
polymerization of hyaluronic acid produced by synoviocytes
Functions of Synovial Fluid
- Lubricate joints
- Reduce friction between bones
- Provides nutrients to the articular cartilage
- Lessen shock of joint compression occurring during activities
Method of collection for synovial fluid
Arthrocentesis
*Normal synovial fluid does not _______ (_______ if clotted)
clot; joint disease
Normal volume of synovial fluid
<3.5 mL
Volume of synovial fluid in cases of Inflammation
> 25mL
Distributed in 4 tubes:
- Microbiology
- Hematology
- Chemistry and other tests
Appearance: Colorless to Pale Yellow
NORMAL
Appearance: Deeper Yellow
Inflammation
Appearance: Greenish Tinge
Bacterial Infection
Appearance: Red
Traumatic Tap; hemorrhagic arthritis
Appearance: Turbid
WBCs, synovial cell debris or fibrin
Appearance: Milky
Presence of crystals
Synovial Fluid Viscosity
Normal:
able to form a string (4-6 cm long)
Synovial Fluid Viscosity TEST:
Ropes/Mucin Clot Test (Hyaluronate Polymerization Test)
Reagent of Ropes/Mucin Clot Test (Hyaluronate Polymerization Test)
2-5% acetic acid
Gradings: both 6th and 3rd ed
Solid Clot Good Good
Soft Clot Fair Fair
Friable Clot Low Poor
No Clot Poor Very Poor