– See: – Occipital-Atlanto-Axial Anomalies: – Anatomy of C1 / C2 – Discussion: – more common children, since the pediatric occipital condyles are small and almost horizontal & lack inherent stability; – this injury is usually but not invariably fatal 2nd to respiratory arrest caused by injury … Read more
– Discussion: – demonstrates intra-articular extension of frx – degree of comminution of posterior facet; – calcaneocuboid joint; – impingement of lateral border of calcaneus on lateral malleolus and entrapment of tendons or nerves can be demonstrated; – latter is best seen … Read more
– Discussion: – decreased neck shaft angle from defect in ossification of femoral neck; – it is bilateral in 1/3 to 1/2 of cases; – it can be congenital (noted at birth & differenitated from CDH by MRI), developmental (AD-progressive), or acquired (trauma, LCP, SCFE) – Differential Dx: … Read more
– Discussion: – hemiarthroplasty menu – Complications: – acetabular ingrowth may be difficult because of osteoporotic bone; – dislocation: – Dislocation Rate After Conversion from Hip Hemiarthroplasty to Total Hip Arthroplasty References: – Conversion from failed hemiarthroplasty to total hip arthroplasty: a Norwegian Arthroplasty Register analysis of 595 hips with previous … Read more
– Discussion: – can reduce back and knee pain; – improved ability to sit for longer periods of time; – increased incidence of dislocation; – indications for conversion: – painful pseudarthrosis – pseudorthrosis rates … Read more
– Discription: – broad cloverleaf shaped plate which is designed to butress comminuted supracondylar fractures; – this plate may be especially indicated for comminuted distal fractures w/ a coronal shear frx; – plate is designed to contour to the lateral aspect of the distal femoral … Read more
– Discussion: – see considerations for sliding screw placement – osseous anatomy of proximal femur dictates where internal fixation device should be placed for maximum purchase in femoral head; – maximum bone density is found in the area where compression & tension trabeculae coalesce in center of head; … Read more
– Discussion: – at time of the injury, calcaneus is driven up toward center of body; – lateral wall is driven outward, as are the peroneal tendons; – this results in shortened functional length of gastrocnemius-soleus complex, flat foot, lateral impingement of peroneal structures, & locked … Read more
– See: Comminuted Femoral Shaft Fractures – Complications: – compartment syndrome of thigh – femoral IM nail infection – avascular necrosis from IM nailing – femoral non union – Implant failures: – associated w/ either the insertion of a small diameter nail or use of an interlocking … Read more
– Disscussion: – compartment syndrome is uncommon in thigh because of large-volume that the thigh requires to cause a pathological increase in interstitial pressure; – fascial compartments of thigh blend anatomically w/ muscles of hip,potentially allowing extravasation of blood outside compartment; – compartment syndrome may be caused by a decrease … Read more