– Discussion: – are characterized by a defect in metabolism of one or more mucopolysaccharides, w/ resulting excessive accumulation of these substances in the extracellular spaces of the connective tissues; – this group of disorders is characterized by a deficiency of specific lysosomal enzymes required for degradation of glycosaminoglycans; … Read more
ORIF of Calcaneal Frx Using Lateral Approach: – Preoperative Planning: – Surgical Stratedgy: – pt in true lateral position – J or L approach w/ subperiosteal dissection off lateral wall, including calcaneo-fibular ligament (sural nerve in flap); – extension from tuberosity to calcaneo-cuboid (watch peroneals) – reduction of critical angle of Gissane/ anterior process to … Read more
– Discussion: – useful in planning surgery & limb salvage procedures; – assists w/ preop planning for relationship of tumor to such adjacent normal structures as physes, joints, & N/V bundles; – Soft Tissue Tumors: – specificity of MRI is poor; – for planning limb salvage prosthesis, … Read more
– Technique: – protocols: fat suppressed T2 wt images and proton density weighted images – older protocol: T1 & T2 coronal oblique spin-echo sequences with use of 14 cm field of view and a four-millimeter slice thickness; – Discussion: – it is the most important view for identification of … Read more
– See: – MRI of Hip: – Johns Hopkins – MRI Evaluation of AVN – Discussion: – magnetic resonance imaging is probably the most accurate imaging modality for dx of AVN of femoral head; – MRI imaging is also used to outline the area of involvement; … Read more
– See: MP joint in RA – Planning: – indications: – irretrievable articular cartilage damage; – volar subluxation; – dislocation are indications for surgery; – cautions: – cervical spine … Read more
Discussion short trunk disproportionate dwarfism is established by age of 2 or 3 and progresses; inherited as autosomal recessive trait; children have normal intelligence and survive well into adulthood; pectus carinatum is also apparant; other problems include corneal opacity and abnormal dentition; type of mucopolysaccharidoses in which keratan sulfate accumulates in the tissues; measurement of … Read more
– See: Watson Jones Approach Smith Peterson Approach – Discussion: – in direct lateral approach, a curvilear split is made thru the anterior portion of the gluteus medius and vatus muscles, in order to gain access to the anterior face of the hip joint; … Read more
– Discussion: – modified procedure includes release of adductor hallucis, transverse metatarsal ligament, and lateral capsule combined w/ excision of medial eminence and plication of the capsule medially; – this procedure was modified to retain the lateral sesamoid, which helps to prevent hallux varus (which as common w/ original Mcbride bunionectomy); – as this procedure attempts to … Read more
– Sampling of Mixed Venous O2: – Shows changes in Arterial oxygenation as the Cardiac Output changes; – Allows calculation of AVo diff and Shunt: (for Respiratory Failure); – PVo2 < 30 mm Hg, prognosis is poor; – Discussion: – normally the Svo2 is about 68 to 77%, w/ a PaO2 to 40 mm Hg; … Read more