– Discussion: – coverts a complex link joint to a simple hinge by creating a radiocarpal articulation; – motion between the radius and capitate is both translational and rotational, which has the effect of dissipating forces on the radius; – expect 60-80% of contralateral motion (w/ about an … Read more
– Discussion: – function of the PTFJ – accept 1/6 the axial load of the leg – resist torsional stresses originating from the ankle – resist tensile forces created with weight bearing – resists lateral bending forces – subluxation is common in preadolescent … Read more
– See: Phalangeal Injury Menu: – Discussion: – fractures of the proximal phalanx are potentially the most disabling fractures in the hand; – direct blows tend to cause transverse or comminuted frx, where as twisting injury may cause oblique or spiral fracture; – proximal fragments are usually … Read more
– See: – Subtrochanteric Fractures – Discussion: – failure of nail to fill IM canal of either the proximal or distal fragment, may lead to postoperative instability; – tend to migrate into a varus deformity – requires abduction and traction for reduction; – tends to have an … Read more
– See: Technique of Free Tendon Grafting – Discussion: – prosthetic graft serves as temporary spacer around which a pseudotendon sheath forms, & provides a healthy bed in which to place tendon autograft; – pulleys can be reconstructed at time of insertion of prosthesis – … Read more
– Anatomy: (see forearm flexors) – origin: – humeral head: medial epicondyle of humerus & common flexion tendon; – ulnar head: medial side of coronoid process of ulna; – insertion: middle 1/3 of lateral surface of … Read more
– Discussion: – see: compression of the median nerve at the elbow and forearm; – compression of median nerve where it passes between the two heads of the pronator teres; – Differential Dx: – lacertus fibrosus: – draws tightly across the median nerve when the … Read more
– used to image the scaphoid, triquetrum, body of hamate, scapho-triquetral and trapezium-trapezoid joints; – hand rests on its ulnar border and tilts 40 to 50 degrees palmarly; fingers are slightly flexed and held together; – central beam is directed to the center of the carpus
origin: distal 1/4 of the volar (ant) surface of the ulna; insertion: distal 1/4 of the volar surface of the radius; action: pronates the forearm; nerve supply: Median , C7 , C8 , T1 ; synergists: Pronator Teres Stabilization of the distal ulna by transfer of the pronator quadratus origin.
– See: – topical antimicrobials – skin prep agents – High Pressure Irrigation: – irrigation can remove enough wound bacteria to cross the threshold to non-infected states, but only if the irrigant is delivered with sufficiently high pressure to mechanically disrupt bacterial adherance to the wound surface; – to be clinically … Read more