Diff Dx of Bone Tumors by Anatomic Site
– Skull – Humerus/Scapula – Hand/Wrist – Spine – Pelvis – Ribs – Proximal Femur – Distal Femur – Proximal Tibia – Distal Tibia – Fibula – Foot – patella: … Read more
Humerus
Design and Function of the Patellar Component in TKR:
patello-femoral function: – significant forces are generated across the patellofemoral articulation on flexion and extension of the knee; – these forces progressively increase as flexion angle of knee increase; – contact area between the femur and the … Read more
Deltoid Muscle
– See: Shoulder Abductors – Discussion: – major function of the deltoid muscle is to abduct arm; – it performs this action after scapula[scapula has been fixed by its stabilizing muscles and the humeral head has been snubbed to glenoid by the rotator cuff; … Read more
Deltopectoral Approach: Superficial Dissection
– See: Anterior Approach to the Shoulder and Total Shoulder Arthroplasty – Incision: – deltopectoral internval separates plane between axillary innervation (deltoid) and lateral and medial pectoral innervation to pectoralis major (incision should stay just lateral to the axillary skin crease); – ensure that the shoulder is position in neutral rotation and slight … Read more
Cast Brace for Humeral Frx
Discussion (Humeral Shaft Frx ») Forces Displacing the Fracture components of a well designed cast brace include an anterior component w/ a bicipital contour and a posterior component w/ a flat mold for the triceps; velcro straps maintain adequate compression; in closed humeral shaft fractures involving the middle or proximal thirds, about 95% of patients … Read more
Capitelar and Coronal Shear Frx
– Discussion: – see lateral condyle fracture – uncommon frx which is difficult to diagnose if fracture frag is small; – any effussion within the elbow joint together with displacement of fat pads suggests either a capitulum fracture or nondisplaced frx of radial head; – Type I: (Hans Steinthal Frx) – type I is fracture … Read more
Brachialis Muscle
– Anatomy: – origin: lower 1/2 of the anterior surface of the humerus; – insertion: tuberosity and coronoid process of the ulna; – action: flexes the forearm at the elbow; – nerve supply: branches of musculocutaneous, C5, C6; – synergist: brachioradialis, biceps brachi
Brachioradialis
– origin: – proximal 2/3 of the lateral supracondylar ridge of the humerus and lateral intermuscular septum; – insertion: – inserts into lateral surface of distal radius, immediately above styloid process; – synergist: Brachialis , biceps brachi ; – nerve supply: radial – C6 > C5 – function: … Read more
Brachial Artery
– See: – Arteries of the Upper Limb; – Profunda Brachi; – Anatomy: – brachial artery originates at the lateral border of teres major muscle & courses down anterior humerus posterior to bicipital aponeurosis; – brachial artery has three main braches, of which profunda brachi … Read more
Both Bone Forearm Frx: Post Op Care
– Assessment of Reduction: – amount of radial bow is determined by drawing a line from the biciptial tuberosity to the ulnar aspect of the distal radius; – at the point of maximal radial bow, measure the distance of a line drawn perpendicular to the first line; – Frx Malunion: … Read more