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An anterior-posterior (AP) X-ray of the pelvis and a cross-table lateral X-ray [24] of the effected hip are ordered for diagnosis. [4] [5] [16] The size of the head of the femur is then compared across both sides of the pelvis. The affected femoral head will appear larger if the dislocation is anterior, and smaller if posterior. [7]
X-ray of the hips of a 40-year-old female, with dysplasia of her right hip. In the adult hip there are important landmarks to be recognized on plain film radiographs: [ 3 ] The iliopectineal or iliopubic line is formed by the arcuate line of the ilium and the superior border of the superior pubic ramus up to the pubic symphysis.
The Sims Position is described as in the person lying on the left side, left hip and lower extremity straight, and right hip and knee bent. It is also called lateral recumbent position. [3] Sims' position is also described as the person lying on the left side with both legs bent. [4]
Projectional radiography ("X-ray")is often considered first line for FAI. [10] Anterior-posterior pelvis and a lateral image of the hip in question should be attained. [10] A 45-degree Dunn view is also recommended. [10] [19]
The Sims' position is a variation of the left lateral position. The patient is usually awake and helps with the positioning. The patient will roll to his or her left side. Keeping the left leg straight, the patient will slide the left hip back and bend the right leg. This position allows access to the anus.
Used in conjunction with Hilgenreiner's line, Perkin's line is useful in the diagnosis of developmental dysplasia of the hip; the upper femoral epiphysis should be in the inferomedial quadrant on a normal radiograph. Lateral displacement relative to Perkin's line is indicative of DDH.
Klein's line or the line of Klein is a virtual line that can be drawn on an X-ray of an adolescent's hip parallel to the anatomically upper edge of the femoral neck.It was the first tool to aid in the early diagnosis of a slipped capital femoral epiphysis (SCFE), which if treated late or left untreated leads to crippling arthritis, leg length discrepancy and lost range of motion.
Organisms in the dinosauria clade are defined by a perforate acetabulum, which can be thought of as a "hip-socket". The perforate acetabulum is a cup-shaped opening on each side of the pelvic girdle formed where the ischium , ilium , and pubis all meet, and into which the head of the femur inserts.