Ortho Oracle - orthopaedic operative atlas

Volar Barton’s Fractures

    – Discussion:     – characterized by frx of volar margin of the carpal surface of the radius which is associated w/ subluxation of radiocarpal joint;            – similar to Smith’s type III;     – comminuted frx of distal radius may involve either anterior or posterior cortex and … Read more

Visoelastic Materials

– Discussion:     – exhibit stress / strain behavior that is time-rate dependent, and varies w/ the material, that is a function of the material’s internal friction;     – visoelastic materials are stiffer and stronger at high strain rates than at low strain rates;            – for example in bone-ligament … Read more

Vertebral Column Development

– Discussion:     – at 2-4th week of development, sclerotome cells arising from paired somites migrate medially & meet in midline around notochord;            – these sclerotome cells separate the notocord from neural tube dorsally and from gut ventrally;     – paraxial mesoderm becomes segmented into four cranial and … Read more

Vertebral Osteomyelitis

– See:        – Diskitis        – Gun Shot Wounds to the Spine        – Tuberculous Spondylitis – Discussion:     – in adults, lumbar infections may often originate from urinary tract infections which drain thru Batson’s venous plexus;           – respiratory system is also … Read more

Vibrio vulnificus

– Discussion:     – gram-negative facultative coccobacillus     – vibrios are among the most common organisms found in waters in US and around the world;             – in the US these infections occur mainly on the gulf coast and southern atlantic seaboard;     – these organisms tend … Read more

Vastus Medialis

    – See quadriceps muscle; Origin: Lower 1/2 of the intertrochanteric lines, medial lip of linea aspera, upper part of medial supracondylar line, medial intermuscular septum          tendons of adductor magnus and adductor longus; Insertion: Medial border of the patella by the ligamentum patella into the tibia tuberosity; Action: Extends the leg at the knee … Read more

Vercuronium

– Discussion:  – nondepolarizing neuromuscular blocking agent similar to pancuronium. – has advantages over other nondepolarizing muscle relaxants by producing less hemodynamic changes, a shorter duration of action;  – dose reductions are not required in renal failure, but may be indicated in hepatic disease.  – Dose:  – usual intraoperative doses are 0.08 to 0.1 mg/kg … Read more