Discussion: – peroneal nerve – peroneal palsy following TKR – nerve injury – discussion: – peroneal nerve palsy may lead to severe disability w/ foot drop and paresthesias; – note that in contrast to other types of nerve palsies, peroneal palsy may … Read more
– See: Peroneus Longus / Peroneus Brevis: – Discussion: – acute dislocation occurs by sudden forced dorsiflexion w/ concomitant eccentric contraction of the peroneal muscles; – classic teaching that the tendon dislocation occurs from a combination of dorsiflexion and eversion (like skiing), where as other authors feel that the injury occurs from dorsiflexion and inversion … Read more
– Discussion: – cartilaginous tumor that arises from surface of cortex deep to the periosteum producing broad based cartilaginous mass that may extend into soft tissues; – often develops after adolescence (in contrast to osteochondroma) – persists as mass of mature cartilage w/o calcification or ossification (in contrast to chondrosarcoma); … Read more
– See: Classic osteosarcoma – Discussion: – uncommon variant of classic osteosarcoma; – primarily affects young adults; – presents as an enlarging, painless mass growing on surface of the bone; – most frequently seen in anterior proximal tibia & the posterior surface of the distal femur; – … Read more
– See: – Carpal Instability – Ligaments of the Wrist – Discussion: – perilunate dislocation pattern provides a whole spectrum of wrist sprains, fractures, dislocations; – types of perilunate dislocations (in order of frequency): – transscaphoid-perilunate … Read more
– See: – Epiphyseal Artery – Metaphyseal Artery – Nutrient Artery – Discussion: – forms an extensive network of vessels covers entire length of the bone shaft; – periosteal vessels send small branches thru minute channels in cortex to supply about outer … Read more
– See: Classification and Column Theory – Percutaneous Screw Placement: – anterior column screws can be placed either antegrade (from cephalad to caudad) or retrograde (vice versa); – implant: 7.3 or 8.0 mm cannulated screws; – C-arm is placed perpendicular to the superior pubic ramus; … Read more
– Discussion: – note that type II fractures may often not be amenable to percutaneous fixation because an acceptable reduction of the depressed fragment can be difficult to obtain; – part of the difficult lies in the fact that the depressed fragment is buried w/ in the plateau and is … Read more
– Discussion: – anatomy of the midfoot: – many orthopaedists have moved away from pin fixation because fixation must be rigid enough to prevent transverse plane & dorsoplantar motion of TMT joint and be maintained for at least 12-16 weeks; – this exceeds the length of … Read more
– Discussion: – arises from posterior aspect of profunda femoris artery; – they course directly against linea aspera of the femur & tendonous insertions of adductor muscles; – inferior gluteus artery gives twigs to upper ends of muscle attaching to ischial tuberosity and transverse branch of MFCA appears … Read more