Most people would be surprised to know that total hip replacements (THRs) have been around since the 1930s. Today's successful use of THRs reflects the many implant changes in design and materials that have taken place since those early attempts. In this article, orthopedic surgeons from the New York University Hospital for Joint Diseases review the history of THRs up to and including today's surface replacement arthroplasty (SRA). SRA is a type of hip replacement that replaces the arthritic surface of the joint. But it removes far less bone than the traditional total hip replacement. Because the hip resurfacing removes less bone, it may be preferable for younger patients who are expected to need a revision (second) hip replacement surgery as they get older and wear out the original implant. The surface replacement arthroplasty (SRA) is done by dislocating the femoral head out of the socket. Special powered instruments are used to shape the bone of the femoral head so that the new meta...
Definition Hereditary ovalocytosis is rare condition passed down through families (inherited) in which blood cells are slightly oval-shaped instead of round. It is a form of hereditary elliptocytosis . Alternative Names Ovalocytosis - hereditary Causes, incidence, and risk factors Ovalocytosis is mainly found in Southeast Asian populations.
Definition Hereditary elliptocytosis is a disorder passed down through families in which the red blood cells are abnormally shaped. See also: Hereditary spherocytosis Hereditary ovalocystosis Alternative Names Elliptocytosis - hereditary Causes, incidence, and risk factors Elliptocytosis affects about 1 in every 2,500 people of northern European heritage. It is more common in people of African and Mediterranean descent. You are more likely to develop this condition if someone in your family has had it.
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