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

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.


It usually follows injury but occurs mainly in patients with a predisposition to hemorrhage such as those being treated with warfarin (or other anticoagulants) and patients with hemophilia.

It can be associated with knee joint arthroplasty.[1]

It has also been reported as a part of hemorrhagic syndrome in the Crimean-Congo Hemorrhagic Fever, suggesting a viral cause to the bleeding in a joint space.[2][3]


Hemarthrosis is diagnosed through the methods listed below:

A physical examination is the first step, the joints of the patient are moved and bent to study the functioning.[4]

Synovial Fluid analysis is another method to diagnose Hemarthrosis. It involves a small needle being inserted into the joint to draw the fluid.[5] Reddish-colored hue of the sample is an indication of the blood being present. Imaging tests are normally done. The tests also include MRI, Ultrasound and X-ray test, which give better information about the joint inflammation.[6]


In hemophilia it may occur spontaneously, and recurrent hemarthroses are a major cause of disability in that patient group due to hemophilic arthropathy, requiring synovectomy, joint replacement[7] and increased medical therapy to prevent further bleeding episodes.

Reducing hemarthroses events using intravenous administration of blood clotting factor concentrate on a regular basis starting in early childhood, reduces joint deterioration and increases the person's quality of life compared to "on demand" treatment (treating after a bleed).[8] The minimal effective dose and best dosage frequency have not been established.[8] It is not clear, due to lack of sufficient data, if preventative therapy with clotting factor concentrate is also effective at reducing joint deterioration if treatment is started after joint damage has occurred.[8]


Up to a quarter of all severe ligament or capsular knee injuries leading to a haemarthrosis are associated with cartilage damage that can lead to progressive degenerative arthritis.[9]


  1. Ohdera T, Tokunaga M, Hiroshima S, Yoshimoto E, Matsuda S (2004). "Recurrent hemarthrosis after knee joint arthroplasty: etiology and treatment". J Arthroplasty. 19 (2): 157–61. doi:10.1016/j.arth.2003.09.009. PMID 14973857.
  2. Ahmeti, Salih; Ajazaj-Berisha, Lindita; Halili, Bahrije; Shala, Anita (Apr 2014). "Acute arthritis in Crimean-Congo hemorrhagic fever". Journal of Global Infectious Diseases. 6 (2): 79–81. doi:10.4103/0974-777X.132052. PMC 4049045. PMID 24926169.
  3. Heyman, Paul; Cochez, Christel; Hofhuis, Agnetha; van der Giessen, Joke; Sprong, Hein; Porter, Sarah Rebecca; Losson, Bertrand; Saegerman, Claude; Donoso-Mantke, Oliver; Niedrig, Matthias; Papa, Anna (2010). "A Clear and Present Danger: Tick-borne Diseases in Europe". Expert Rev Anti Infect Ther. 8 (1): 33–50. doi:10.1586/eri.09.118. PMID 20014900.
  4. "Hemarthrosis". Healthline. Retrieved 2017-11-21.
  5. "Hemarthrosis - What You Need to Know". Drugs.com. Retrieved 2017-11-21.
  6. Baker, C. L. (June 1992). "Acute hemarthrosis of the knee". Journal of the Medical Association of Georgia. 81 (6): 301–305. ISSN 0025-7028. PMID 1607844.
  7. Dunn AL (Sep 2005). "Management and prevention of recurrent hemarthrosis in patients with hemophilia". Current Opinion in Hematology. 12 (5): 390–4. doi:10.1097/01.moh.0000169285.66841.c8. PMID 16093785.
  8. Iorio, Alfonso; Marchesini, Emanuela; Marcucci, Maura; Stobart, Kent; Chan, Anthony Kc (2011-09-07). "Clotting factor concentrates given to prevent bleeding and bleeding-related complications in people with hemophilia A or B" (PDF). The Cochrane Database of Systematic Reviews (9): CD003429. doi:10.1002/14651858.CD003429.pub4. hdl:2434/231551. ISSN 1469-493X. PMID 21901684.
  9. Goldberg A, Stansby G "Surgical Talk" 2nd edition
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