Diagnostic Criteria and Management of Hemarthrosis

Clinical Presentation and Diagnostic Approach

Pain, swelling, and loss of movement over baseline are the primary clinical indicators of hemarthrosis, according to the Journal of Thrombosis and Haemostasis 1
Warmth, erythema, and fever may be present in cases of septic arthritis, which must be differentiated from hemarthrosis, as noted by the American College of Radiology 2
Night pain or pain at rest is characteristic of infection, whereas pain on weight bearing is more characteristic of mechanical issues, as reported by the American College of Radiology 2

Joint aspiration is the gold standard for confirming hemarthrosis, with aspirate analysis including cell count with differential, as recommended by the American College of Radiology 3
Gram stain and cultures should be performed to rule out infection, according to the American College of Radiology 3
Crystal analysis can help rule out crystal arthropathies, although the preferred guideline society for this recommendation is not specified 4
Plain radiographs should be the initial imaging modality to assess for fractures, joint space narrowing, or other abnormalities, as suggested by the American College of Radiology 2
Ultrasound is highly useful for confirming the presence of joint effusion and guiding joint aspiration, as noted by the American College of Radiology 6

Hemarthrosis is defined as an episode of bleeding into a joint, determined clinically and/or by imaging studies, generally associated with pain and/or swelling and loss of movement over baseline, according to the Journal of Thrombosis and Haemostasis 1
A target joint is defined as one with three or more spontaneous bleeds within a consecutive 6-month period, as defined by the Journal of Thrombosis and Haemostasis 1
Response to treatment should be assessed using specific criteria, including excellent, good, moderate, and none, as outlined by the Journal of Thrombosis and Haemostasis 1

Septic arthritis must always be ruled out in cases of joint effusion with pain, as it is a surgical emergency, according to the American College of Radiology 6
In patients with total knee arthroplasty presenting with pain, infection should be considered and ruled out, as recommended by the American College of Radiology 2