SYNOVIAL FLUID Flashcards
def? Fluid within joint cavities
synovial fluid
what changes are examined for in synovial fluid
septic, aseptic, or degenerative
true or false: synovial fluid Provides nutrients to articular cartilage
true
true or false: Reduces shock of joint compression during strenuous activities
true
how is synovial fluid formed
Ultrafiltrate of plasma across synovial membrane
Synoviocytes secrete hyaluronate
what is normal amount of synovial fluid in the knee cavity
less than 3.5 mL
true or false: synovial fluid in the knee clots
false
what is the needle aspiration for synovial fluid called
arthrocentesis
true or false: synovial fluid is not STAT
false
what should not be used for crystal analysis in synovial fluid
powdered anticoagulants
what is the normal appearance of synovial fluid
colorless to pale yellow
what does yellow synovial fluid mean
inflammation
what does milky synovial fluid mean
crystals
what does bloody synovial fluid mean
hemorrhagic arthritis
traumatic aspiration
what does greenish synovial fluid mean
bacterial infection
what is the normal amount of viscosity of synovial fluid
4-6 cm string
what does turbid synovial fluid mean
WBC
cell debris
fibrin
what gives synovial fluid viscosity
polymerization of hyaluronic acid
what happens to hyaluronic acid in arthritis pt
polymerization decreases
true or false: less than 2000/uL RBC is normal in synovial fluid
true
what is the normal amount of WBC in synovial fluid
less than 200/uL
what condition has increase WBC in synovial fluid
bacterial arthritis
what is the most common WBC in synovial fluid
monocytes or macrophages
if there are more than 80% neutrophils in synovial fluid what does this indicate
bacterial arthristis
urate gout
what crystals are in synovial fluid of gout pt
Monosodium urate crystals
what crystals are in synovial fluid of degenerative arthritis pt
Calcium pyrophosphate crystals
what crystals are in synovial fluid of chronic arthritic inflammation pt
cholesterol crystals
how are crystals prepared for examination under a light microscope
wet prep
wright stained
what tool examines crystals based on the velocity of light rays passing through the crystal’s grain
Quartz Red Line Compensator
when monosodium urate crystals are parallel to the axis quartz red line compensator what color are they
yellow
when monosodium urate crystals are perpendicular to the axis quartz red line compensator what color are they
blue
def? Tiny, needle-like crystals
hydroxyapatite
what kind of crystals are seen months after steroid injections
corticosteroids
true or false: All synovial fluid samples should be cultured
true
