Thursday, February 14, 2008

eponyms in medicine - part 4

31 - Lachman maneuver is for diagnosing ACL tear - pull on tibia in anterior direction with knee flexed at 20-25 degrees (if tibia slides anteriorly >2 mm - positive).

32 - Allen’s sign is in pulmonary embolism - fever - tachycardia - and tachypnea - present in only 23% of cases.

33 - Isaacs’s syndrome is neuromyotonia; continuous muscle stiffness - rippling muscle movements (myokymia) - delayed relaxation following muscle contraction believed to be due to autoantibodies to presynaptic potassium channels.

34 - Stevens-Johnson syndrome is extensive and symptomatic febrile form of erythema multiforme - more common in children; 1-6 cases/million person-years.

35 - Betz cells is large pyramidal cells in layer 5 of primary motor cortex largest neurons in mammalian CNS; 30-40 -000 Betz cells in precentral gyrus in one side of the brain.

36 - Thomsen’s disease is myotonia congenita - autosomal dominant.

37 - Trietz - ligament of is the suspensory muscle of the duodenum which supports the duodenojejunal flexure.

38 - Bier block is regional anesthesia of an extremity by placing a tourniquet and then infusing local anesthetic into a vein.

39 - Trendelenburg position is position where angle of the head of bed or table is inclined at 45 degrees down; used in surgery to push the abdominal organs towards the chest.

40 - Crohn’s disease is transmural mucosal inflammation that may involve the entire GI tract from mouth to the perinanal area that often leads to fibrosis and obstructive clinical presentations; 80% small bowel involvement - usually distal ileum; 1/3 exclusively ileitis; 50% ileocolitis; and 20% disease limited to colon.

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