(see also: Renal Osteodystrophy; Remodeling of Bone) Discussion caused by excessive production of parathyroid hormone which leads to hypercalcemia, recurrent nephrolithiasis, pancreatitis, peptic ulcers, and mental changes; incidence of approx 5 /10,000 pts per year; usually affects adults over 50 yrs & occurs more commonly in females; causes: in most cases is due to single … Read more
– See: bone mineralization – Basic Science: – compound that is similar to bone mineral, sharing the formula Ca10 (PO4 )6 OH2; – crystal lattice of hydroxyapatite is hexagonal or pseudohexagonal; – as shown by radiographic diffraction analysis, calcium and phosphate mineralize in bone in the form of an … Read more
– Discussion: – see: Oasis Surgical Technique by Jack Farr – uses a distraction histiogenesis strategy; – three separate phases: – latency phase that immediately follows the osteotomy for some duration during which time no mechanical perturbation is applied; – active or distraction phase during which the two bony segments are … Read more
– Discussion: – medial displacement osteotomy to stabilize unstable 4 part intertrochanteric frx; – in 4 part frx, adductors tend to displace frx into varus secondary to lack of medial cortical opposition; – disadvantages: – in a biomechanical study by Chang, el al., it … Read more
– Discussion: – positive Hoffmann’s reflex reflects presence of an upper motor neuron lesion from spinal cord compression; – is elicited by flipping either the volar or dorsal surfaces of the middle finger and observing the reflexcontration of the thumb and index finger; – this sign is evidence by upper motor … Read more
– Advanced Disease: – osteoclastic resorption may become so severe that no bone is seen; – there is granulation tissue w/ fibroblasts, giant cells, inflammatory cells, and macrophages, containing hemosiderin in many cases; – this is characteristic of a brown tumor of hyperparathyroidism; – due … Read more
– See: Pediatric Femoral Frx Menu – Discussion: – timing: – Immediate single-leg spica cast for pediatric femoral diaphysis fractures. – contraindications: – unacceptable shortening or angulation; – open fractures; – thoracic or intra-abdominal trauma; … Read more
(see also: Acetabular Frx; Femoral Neck Frx; Radiology of the Hip) Antibiotic Prophylaxis Anterolateral Approach Anterior Approach Anteversion of Hip Arthrodesis Arthroscopy of the Hip Aspiration Avascular Necrosis of the Femoral Head Blood Supply to the femoral head and neck; Capsule Child’s Hip – Pathologic disorders CDH Coxa Vara Dislocations of the Hip Effusion Embryology … Read more
– Diff Dx: – Intracapsular Fractures – Toxic Synovitis of the Hip – Septic Arthritis – Osteomyelitis – Legg Perthes disease in children. – Clinical Features: – person suffering from a painful Hip Joint effusion is most comfortable when seated with the painful thigh … Read more