– Discussion:: – iliotibial band (and thin fascia covering maximus) are incised in line w/ the incision; – in most cases, the hip is kept in midflexion for both the skin incision and the IT band incision; – if the hip is repositioned in extension … Read more
– Patient Position: – ensure that patient has not rotated anteriorly, for this may allow acetabular component to be placed in retroverted position; – ensure that patient’s torso is not tilted inferiorly (as can occur from a bean bag), as this can cause reaming in an excessive … Read more
– Discussion: – aging of cement results in decreased elastic modulus and flexural and compressive strength, and increased creep deformation; – cracks occur as a result of creep deformation through voids in cement; – w/ poor cement technique and varus position of stem, x-ray evidence of loosening may be … Read more
– See: Total Hip Replacement Menu: – cementless components – cement technique – acetabular component revision – operative considerations for hip dyplasia – protrusio – Discussion: – technical considerations: – in the report by Crites BM, et al (2000), the effect of porosity reduction cementing techniques with respect to radiolucent lines … Read more
– See: Total Hip Replacement Menu: – acetabular component revision: – operative considerations for hip dyplasia – protrusio – reaming technique: – component insertion: – … Read more
– Femoral Anteversion: – femoral version is defined as the angular difference between axis of femoral neck and transcondylar axis of the knee; – normal values: – on average, femoral anteversion ranges from 30-40 deg at birth and decreases progressively throughout growth to about 15 deg at skeletal maturation; – … Read more
– Discussion: – see native acetabular anteversion and femoral anteversion and acetabular component position – general considerations: – simple visualization of length of anterior/posterior walls gives an accurate measure of native anteversion; – references: – Femoral anteversion in THA and its lack of correlation with native acetabular anteversion. – … Read more
– See: Total Hip Replacement Menu / acetabular component revision: – Surgical Technique: – preoperative planning: – acetabular biomechanics: – operative considerations for hip dyplasia – protrusio – types of components: … Read more
– See: – operative considerations for hip dyplasia – acetabular component revision – Discussion: – restoration of the normal hip center in acetabular reconstruction encourages restoration of normal biomechanics; – medial placement: – moving hip center medially improves efficiency of … Read more
– See: Vascular Problems of the Upper Extremity: – Discussion: – thoracic outlet space is created by the clavicle, first rib, subclavius muscle, costoclavicular ligament, and anterior scalene muscle; – most often affects subclavian artery, vein, and lower trunk (C8 & T1) of brachial plexus; – both the subclavian artery and the brachial plexus traverse … Read more