Ortho Oracle - orthopaedic operative atlas

Synovial Plica

– Discussion: – synovial plica are folds of embryonic remnants of synovial membrane which, in fetus, divide knee is divided into medial, lateral, & patellar compartments; – although these membranes normally degenerate by the second trimester, (allowing knee to become one cavity), incomplete membrane degeneration will lead to the formation of plica – Medial (Shelf) Plica … Read more

Syndactyly: Associated Syndromes

    – Acrosyndactyly;     – Delta Phalanx;     – Poland’s syndrome:            – hypoplasia of hand and simple syndactyly of fingers on the same side as the absent pectoral muscles (and other chest wall muscles);     – Apert’s Syndrome:            – when all digits are … Read more

Symbiotic infections

– Discussion:     – caused by non hemolytic Strep and hemolytic Staph aureus;     – although staph alone may show up on culture, special attention may must be paid to isolating the microaerophilic Streptococceae;     – necrotizing fascitis may occur, especially in diabetics;     – any hand infection that does not respond … Read more

Syndactyly

        – See: Acrosyndactyly; – Discussion:     – failure of differentiation of the tisses between the fingers at 5th-8th week of intrauterine life (see limb development);     – most common in the middle and ring fingers;     – syndactyly (webbing  or fusion of two or more digits), a result of failure of … Read more

Syme’s Amputation

– Discussion:     – includes ankle disarticulation, removal of malleoli, & anchoring heel pad to the wt bearing surface) allows execellent gait with a cosmetic             prosthesis;     – symes amputations will not heal w/o palpable posterior artery pulse;     – surgery may be performed in 2 stages;     – most common … Read more

Syndesmotic Sprain

– See: Technique of Snydesmotic Fixation – Discussion:     – if only syndesmotic ligaments are divided (w/ fibula & collateral ligaments intact) there will be no widening of mortise or lateral displacement of talus;     – compressing the fibula and tibia above the ankle elicits tenderness at the syndesmosis, implies injury to the … Read more

Syndesmotic Injuries of the Ankle

  – See: syndesmotic sprain – Anatomy: – syndesmosis is made up of anterior-inferior tibiofibular ligament, interosseous ligament, and posterior-inferior fibular ligaments, inferior transverse tibiofibular ligament, and interosseous ligament; – these stabilize the mortise by opposing the fibula in the fibular notch (incisura fibularis tibiae); – section of the anterior tibiofibular ligament results in diastasis of … Read more

Swing Phase of Gait

– See: Gait Menu: and Muscle Activity During Gait – Discussion:     – during swing, the ankle dorsiflexes by the concentric contraction of anterior tibialis muscle;     – all other muscles are silent;     – momentum generated by the gastrocsoleus and hip flexors at terminal stance carries the leg forward     – during initial swing … Read more