Please note: The information provided in this web site and the associated links is for educational purposes only and is not intended as a substitute for the medical advice of physicians.
This site built and maintained by Catriona Hill    Copyright 2003 Catriona Hill. All rights reserved.
I have compiled this list using my own knowledge and also by surfing the net.
Please let me know of any terms you'd like added or edited.

Abducted -held/moved apart, away from centre.
Adductor Tenotomy -the surgical division of the tendon that attaches to the adductor muscle (used to bring the legs together). Snipping it     allows the legs to fall further apart resulting in better positioning of the femur into the acetabulum.
Acetabulum -the cup shaped socket on the hip bone.
Acetabular Index -the angle formed by drawing a horizontal line at the bottom of the pelvis and an angled line from the bottom of the pelvis to the outer edge of the socket. By 4 months a normal index is 30 degrees or less with the index decreasing until it reaches 20 degrees or less. An index above 30 degrees should prompt the doctor to begin treatment. The higher the index, the more aggressive the treatment.
Arthrogram -x-ray of a joint.
Avascular Necrosis -a type of tissue death which occurs when no blood is getting to the tissue and the tissue dies. In most cases, the tissue here refers to the top of the femur.
Ball -the top or 'femoral head' of the femur, which normally sits inside the hip socket.
Bilateral -affecting both sides.
Closed Reduction -putting a bone back into its proper position without making an incision.
Congenital -present at birth.
CT or CAT scan -combination of x-rays and computer technology to produce cross-sectional images of the body, showing detailed images of bones, muscles, fat and organs.
Dislocated -when a joint is out of place.
Dysplasia -not properly formed.
Femur - thigh bone.
Femoral Head -the top or ball of the femur, which normally sits inside the hip socket.
Femoral Osteotomy -cutting and repositioning the femur in order to hold the femur in the acetabulum.See also Varus Osteotomy.
Ilium -one of the 3 bones which make up the pelvis. When you put your hands on your hips, these are the ilium bones.
'innominate' (or pelvic) Osteotomy -cutting & reshaping the pelvis in order to hold the femur in the acetabulum.
Ishium -one of the 3 bones which make up the pelvis. When you sit, you sit on your ishium bones.
Magnetic resonance imaging (MRI) -combination of magnets, radiofrequencies and a computer to produce detailed images of organs and structures within the body.
Open Reduction -putting a bone back into its proper position through an incision.
Pelvic Osteotomy -cutting & reshaping the pelvis in order to hold the femur in the acetabulum. Also known as an Innominate Osteotomy.
Pubis - one of the 3 bones which make up the pelvis. the pubis bones form the lower front part of each side of the pelvis.
Subluxation -able to move in and out of the socket.
Traction -applying weights on a pulley system to a limb to gradually stretch tight muscles.
Unilateral -affecting one side.
Varus Osteotomy or Varus Rotational Osteotomy/VRO - an operation where the shaft of the femur is divided just below the neck and the angle between the neck and the shaft is reduced. In a VRO, the femur is also rotated to the correct angle.
Varus Derotational Osteotomy/VDO -a similar procedure to VRO (see above).
X-ray -uses invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs onto film.

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