Posterior Meniscal Tear: Open Meniscal Repair
– See: – Posterior Horn Tears of Medial Meniscus – Open Medial Meniscal Repair (Posterior) – Open Lateral Meniscal Repair (Posterior)
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Posterior Interosseous Nerve Compression Syndrome
– See: PIN – Inciting causes: – radiocapitellar joint ganglions and synovitis – congenital tightness of ligamentous arcade of Frohse; – include poorly placed screws for fracture fixation – PIN is vulnerable during ORIF of proximal radius; – in 25% … Read more
Posterior Malleolar Fractures
Discussion trimalleolar fractures involve frx of the medial and lateral malleoli along w/ a frx of the posterior lip of tibial plafond; frx fragment results from avulsion by the posterior tibiofibular ligament at its site of attachment to the tibia; clinical results triamalleolar frxs are generally worse w/ larger fragments involving a larger portion of … Read more
Posterior Interosseous Nerve
– 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 in its course from anterior to … Read more
Posterior Impingement
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
Posterior Iliac Crest Graft Harvest
– See: Autograft Discussion – PreOp Planning: – if patient has undergone previous bone graft harvests, consider CT scan to determine amount of remaining bone left in the crest; – Technique: – ensure that appropriately sized self retaining retractors are available; – straight longitudinal incision is made over posterior superior … Read more
Posterior Humeral Circumflex Artery
– Discussion: – branch of the Axillary Artery – largery than AHCA. – passes around the posterior astpect of the surgical neck of the humerus with the Axillary nerve (thru quadrangular space ); – runs w/ the nerve around the humerus under the Deltoid muscle Anatomy of … Read more
Posterior Horn Tears of Medial Meniscus
– Discussion: – posterior horn of the medial meniscus is difficult structure to view w/ arthroscope, esp in very tight joints with little valgus laxity; – Positioning: Valgus Stress to the Slightly Flexed Knee: – valgus stress applied to slightly flexed knee (no > 10 deg) combined w/ external rotation of tibia … Read more
POSTERIOR HEMIBLOCK
– Associated with Inferior infarction – R.A.D. – usually associatted with an MI – Normal or Slightly widened QRS – S1 (small R in I), small Q3 – Note: Post HemiB may be associatted w/ R.B.B.B.; (may lead to AV blocks: Mobitz II) – Note: Lateral Infarction may cause R.A.D. – Must r/o: – Slender … Read more
Posterior Fusion
– See: Crankshaft Phenomenon: – Progressive Congenital Scoliosis: – fundemental procedure for congenital scoliosis is posterior spine fusion w/o instrumentation; – in young children correction of congenital scoliosis w/ instrumentation carries a higher risk of neurologic injury; – in older children w/ congenital scoliosis, instrumentation & correction of deformity … Read more