Class I Agents
A : PROCAINAMIDE DISOPYRAMIDE QUINIDINE B: LIDOCAINE TOCAINIDE PHENYTOIN MEXILITINE C: FLECAINIDE ENCAINIDE LORCAINIDE
Data Trace Editor
Chronic Sclerosing Osteomyelitis
– Discussion: – chronic sclerosing osteomyelitis (of Garre) has dense sclerotic appearance and often no associated lucency on radiographs; – lesion usually involves the entire circumference of the bone and is much more widespread than a stress fracture; – thinner linear sclerotic appearance of a stress fracture should be … Read more
Chronic Slip
– Discussion: – most common presentation is chronic slip (60 % of cases); – may cause pain refered to hip, distal medial thigh, or knee; – on exam, look for loss internal rotation, which may be manifested by observing the extended hip move into external rotation as hip is … Read more
Cimetidine/Tagamet
– for PUD, prophylaxis in trauma, burns, surgery; – Adult: active PUD: 300 mg PO/IV tid-qid, or 400 mg PO bid; – over 90% of ulcers should heal after 12 wks of therapy – Hosp Prac. 1979 – ulcers which have not healed after 12 wks, probably will not heal w/ H2 Blockers; – for … Read more
Circumferential Growth
– Discussion: – to understand functions of & reasons for haversian systems, one must consider manner in which diaphysis grows circumferentially; – since bone is hard substance, it can grow only by adding new material to its surface; – at birth, diaphyseal portion of human femur is tube about 6 mm … Read more
Chronic Unreduced Anterior Shoulder Dislocations
– Discussion: – chronic unreduced dislocations of greater than 6 months duration may involve significant destruction of the humeral head from large Hill Sachs lesions or reverse Hill Sachs defects; – Treatment: – these usually require arthroplasty; – w/ TSR humeral component is placed in 60 – 75 … Read more
Cierny Classification of Osteomyelitis
– Discussion: – there are four main considerations in classifying osteomyelitis; – condition of the host – functional impairment caused by the disease – site of involvement – extent … Read more
Chordoma
Discussion rare, slow growing tumor arising from remnants of the notochord in axial skeleton of middle aged adults; most occur in midline at base of skull and in the sacrococcygeal area (it is the most common primary bone tumor of the sacrum); classically a slow growing lytic, anterior scaral (50%), or cervical lesion in 35%; … Read more
Chronic and Exertional Compartment Syndromes
– Anterior Compartment Syndrome: – anterior compartment of leg is involved most often; – pain is often burning in nature which worsens with activity and completely subsides after 15 minutes of activity cessation; – diff dx: – tibial and fibular stress frx; – … Read more
Chronic Capitolunate Instability
– Discussion: (see: dynamic instability); – capitolunate joint has high potential for instability, since it is mainly stabilized only by the radiocapitate ligament (and captiotriquetral ligament, to a lesser degree); (see wrist ligaments); – may result from malreduced radial styloid frx, or any condition which shortens or reduces tension in the … Read more