Hemarthrosis

Hemarthrosis is a bleeding into joint spaces. It is a common feature of hemophilia.

Hemarthrosis
Other nameshaemarthrosis
Lipohemarthrosis (blood and fat in the joint space) seen in a person with a subtle tibial plateau fracture. The arrow indicates a fluid level between the upper fat component and the lower blood component.
Medical specialtyRheumatology
SymptomsJoint pain, swelling, and redness

Blood tests

Synovial fluid examination[1][2]
TypeWBC (per mm3)% neutrophilsViscosityAppearance
Normal<2000HighTransparent
Osteoarthritis<5000<25HighClear yellow
Trauma<10,000<50VariableBloody
Inflammatory2,000–50,00050–80LowCloudy yellow
Septic arthritis>50,000>75LowCloudy yellow
Gonorrhea~10,00060LowCloudy yellow
Tuberculosis~20,00070LowCloudy yellow
Inflammatory: Arthritis, gout, rheumatoid arthritis, rheumatic fever
  1. ↑ Flynn JA, Choi MJ, Wooster DL (2013). Oxford American Handbook of Clinical Medicine. US: OUP. p. 400. ISBN 978-0-19-991494-4.
  2. ↑ Seidman AJ, Limaiem F (2019). "Synovial Fluid Analysis". StatPearls. StatPearls Publishing. PMID 30725799. Retrieved 2019-12-19.
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