Ortho Oracle - orthopaedic operative atlas

Arcuate Ligament

– Discussion:     – it is not a separate ligament but is condensation of fibers of origin of popliteus and helps form the arcuate complex:     – arcuate ligament is a Y shaped condensation of fibers that courses from the fibular head, over the popliteus, to            insert on the posterior capsule;     … Read more

Arterial Blood Gas

– See:       – Metabolic Acidosis       – Resp. Acidosis       – Metabolic Alkalosis       – Resp. Alkalosis – Decreased PaCO2:     – if PaCOz is less than 35 mmHg and pH more than 7.45, the patient is hyperventilated and the respiratory frequency or IMV rate of … Read more

Arcade of Struthers

– Discussion:     – in middle of the arm, ulnar nerve pierces medial intermuscular septum and descends in front of the medial head of the triceps;     – in 70-80% of individuals, nerve passes under arcade of Struthers;     – the arcade is a thin aponeurotic band extending from medial head of … Read more

APC III

– Discusison:     – w/ application of severe AP force, hemipelvis rotates externally until posterior iliac wing contacts posteior sacrum;     – continued force rips posterior SI ligaments, completely dissconecting hemipelvis from the sacrum;     – APC III have highest rate of assoc injury, including retroperitoneal bleeding;     – by definition then, an … Read more

Application of Hex Nut Compression

– Discussion:     – in most cases, antegrade screw insertion across the fracture site, will result in fracture site compression;     – once the medial threads have passed the fracture site, fracture compression usually takes place;     – remove one of the two hexagonal nuts, and then advance the remaining screw up … Read more

Approach to Distal 1/3 of Radius through an Anterolateral Incision

– See:     – Plating Techniques – Technique:     – incision begins in front of radial styloid process, extending proximally in straight line along anteromedial border of the brachioradialis;     – brachioradialis is reflected laterally to expose superficial radial nerve in proximal portion;            – avoid injury this nerve as … Read more

Approach to Thoracolumbar Spine

– Positioning:  – foley and appropriate IV access established;  – place patient into left lateral decubitus position (L side up)  – break table in the middle;  – Incision and Exposure:  – incision is made along 10th rib which then curves along anterior abdomen as appropriate (based on size of patient);  – 10th rib is identified, … Read more

APC II

– Discussion:     – involves tearing of both anterior SI ligaments of floor of pelvis (sacrotuberous and sacrospinous);     – involves a widened anterior SI joint  & injury to anterior ring (usually a symphysis diastasis) best seen on the Inlet view;     – may be bilateral or unilateral;     – this … Read more

AP of Spine

– See:       – Pillar View – Discussion:     – this view demonstrates C3 thru C7 vertebral bodies, spinous processes and lateral masses; – Evaluates:     – lateral mass fractures     – sagittal plane frxs (also called vertical compression frx) may be visualized on the anteroposterior view;     – this view … Read more