– See: Impediments to Reduction – Discussion: – dislocated femoral head: – femoral head and neck remain anteverted and in the valgus position; – is pulled proximally & laterally by hip abductors; – becomes misshapen & flattened; … Read more
– Discussion: – following inital ischemic episode, most of the epiphysis is avascular; – while enchondral ossification temporaily halts, the articular cartilage, which is nourished by synovial fluid, continues to grow; – this results in widening of medial cartilage (joint) space & smaller ossification center in involved hip; … Read more
– History: 1963 – Maurizio described the association of patellar tendonitis with jumping 1973 – Blazina, et al. coined the term “jumper’s knee” 1978 – Mariani, et al. and Roels, et al. widened the term “jumper’s knee” to include pathology of the patellar tendon at the tibial tuberosity 1986 … Read more
– See: Subluxation of the Patella – Fulkerson Classification: – type I, subluxation alone; – type II, subluxation and tilt; – type III, tilt alone; – type IV, no malalignment; – Clinical Presentation: – anterior knee pain with a tight, … Read more
– See: – Extensor Mechanism Injuries of the Knee – Quadriceps – Patellar Tendon Avulsion from TKR – Discussion: – usually occur in pts under age of 40; – most ruptures occur w/ the knee in a flexed position (around 60 deg) which are then … Read more
– Discussion: – distal end of femur is hypoplastic, tibia is absent, & proximal dislocation of fibular head; – incidence is 1 in 1 million. – has a familial inheritance; – tibial hemimelia may be terminal or intercalary, complete or incomplete. – 30% percent of … Read more
– See: – Total Hip Replacement Menu: – Acetabular Component Revision: – Acetabular Defects Grafting Options: (frozen allograft) – Dysplastic Hip: – Acetabular Radiographic Evaluation – Posterior … Read more
– See: THR Main Menu and Radiographic evaluation of THR – Discussion: – normal gait adaptions: – trendelenburg limp after THR is a clinical sign of gluteal insufficiency; – static trendelenburg sign: drop of the pelvis on the contralateral side while the individual stands on the operative side; – many patients will compensate for … Read more
– Discussion: – malposition of the joint line: – varus tibial component positioning – AP and lateral mechanical axias views can often identify subtle malalignment – flexion of femoral component: – will result in loss of full … Read more
– See: ABG – oxygenation is Independent of minute volume until ventilation is low; – hence: increasing minute volume does not improve oxygenation; – note: at pO2 of 75 mm Hg, the saturation = 95% at pO2 of 60 mm Hg, the saturation = 90% hence: pO2 of 75 is adequate for all … Read more