Discussion: – the hyperextension phase of throwing may be the most important component of internal impingement; – in the late cocking position (abduction, external rotation, extension) may cause the postero-superior edge of the glenoid labrum to become caught between the humeral head and rotator cuff (surface of the infraspinatus and posterior fibers of supraspinatus tendon); – … Read more
– Anatomy: – this nerve is deep motor branch of radial nerve & supplies all of extrinsic wrist extensors except for the ECRL; – radial nerve enters the anterior compartment of the arm lying deeply between brachialis medially & BR & ECRL laterally; – PIN passes thru supinator muscle … Read more
– Discussion: – diagnosis: limb is shortened, internally rotated, and adducted; – Thompson and Epstein Classification: – Type I: w/ or w/o a minor fracture – Type II: w/ large single frx of post. acetabular rim; … Read more
– Graft Selection: – bone patella bone allograft or achilles tendon allograft; – if achilles tendon is used, the free end is secured w/ a locked whip stitch (Krackow stitch); – in the report by Fanelli et al. 1996, there was no disadvantage … Read more
– Tibial Tunnel: – saftey measures: – surgeons who do not perform this operation frequently should use flouroscopy for this tunnel; – apply Jacobs chuck for a preset distance on the guidewire to make it less likely for the wire to pass … Read more
– See: – Classification and Column Theory – Posterior Wall Fractures – AO Foundation Posterior Column Frx – Discussion: – posterior column extends from obturator foramen thru posterior aspect of the wt bearing dome of acetabulum & then obliquely through greater sciatic notch; – frx of … Read more
– Discussion: – dx is made when there is posterior instability on exam and a bone fragment was seen on x-ray; – MRI allows determination of the anatomy of the tear (ie femoral or tibial origin); – tibial avulsions: – tibial avulsions … Read more
– See: – AP view – Carpal height & Carpal height ratio – Clenched Fist AP – Radial Inclination – Radial Length & Width – Ulnar Variance – X-ray for Distal Radius Frx – Discussion: – AP View is prefered for … Read more
– See: – Associated Transverse and Posterior Wall Frx – Classification and Column Theory – Discussion: – most common type of acetabular frx (up to 50% of acetabular fractures will contain a posterior wall fragment); – posterior wall frxs involve the posterior articular surfaces, often w/ retroacetabular … Read more
– Discussion: – initial postop plaster splint holds the wrist in 20 degree flexion, MP joints in at least 60 degree flexion, and digits should be held in extension inorder to avoid contractures; – motion is begun after a few days, once it is clear that the wounds are healing well; … Read more