ABFAS boards (Rearfoot and forefoot) questions with correct answers|100% verified|52 pages

ABFAS boards (Rearfoot and forefoot) questions with correct answers Properties of Calcium phosphate antibiotic beads - Correct Answer-non exothermic Must use powder Peaks at 3 hours and then elutes over 72 hours 120 day shelf life Most common 5th metatarsal fracture - Correct Answer-Avulsion fracture (about 50% of 5th met fractures) normal IM between 4 and 5? normal lateral bowing angle? - Correct Answer-IM= 6.5-9.0 bowing angle=2.6 What is the Myerson procedure? - Correct Answer-use of EHB in correction of HAV. What is biologic fixation? - Correct Answer- stewart classification - Correct Answer-5th met base fracture benefit of ropivicaine over bupivaine - Correct Answer-less cardiotoxicity, but much more expensive. most common cause of peroneal spastic flatfoot? - Correct Answer-tarsal coalition What causes a local anesthetic to have faster onset? - Correct Answer-Lower pKa Where does the extensor apparatus originate/insert - Correct Answer-There is no specific area that it originates from or inserts What is a geode in medical terms?? - Correct Answer-A subchondral cyst Insertion of EDB - Correct Answer-Extensor apparatus near base of proximal phalanx. changes to X-ray machine for fiberglass cast - Correct Answer-increase mA by 1.5x What motion unlocks the knee during gait cycle? - Correct Answer-Pronation of the STJ, this causes the femur to rotate laterally which will unlock the knee Which inhaled anesthetic is the most cardioprotective? - Correct Answer-isoflurane What is the half life of heparin? - Correct Answer-6 hours Difference between technetium and gallium - Correct Answer-Technetium binds to hydroxyapatite and is seen in areas of high bone turnover. Gallium binds to WBC's and is seen in areas of increased inflammation. If used together, Technetium should be given first. Which ASA class has 2-3x risk for post-op complications. - Correct Answer-ASA class III: specifically a pulmonary complication How is LMWH excreted? - Correct Answer-through the kidneys; should be avoided in those with kidney failure Which local anesthetic is lease likely to cause methemoglobinemia? - Correct Answer-Marcaine although is is very rare for the other local anesthetics anyway. What does exposure mean in medical research? - Correct Answer-Any factors or characteristics that may explain/predict a certain outcome. What types of fixation provide compression and also osteogenesis. How do things provide osteogenesis? - Correct Answer-Lag screws and dynamic compression plates. The lack of motion stimulates osteogenesis Why is alcohol used to dilute phenol? - Correct Answer-phenol is insoluble in water, but is soluble in alcohol. Should diuretics be held prior to surgery? - Correct Answer-yes, hypotension is common in surgery and taking a diuretic may exacerbate the hypotension anticoagulant that is a direct thrombin inhibitor? - Correct Answer-dabigatran Term in a research study for all people who enter a study regardless of treatment, exposure, or ability to complete the study? - Correct Answer-study population antibiotic for open fracture at a farm? - Correct Answer-10-20 million units of penicillin due to possibility of clostridium contamination. Why is thermal necrosis of bone problematic? - Correct Answer-increased zone of resorption at osteotomy site met base osteotomy with high rate of dorsal malunion - Correct Answer-crescentic osteotomy Correction of digiti quinti varus with V-y skin plasty often doesn't work due to... - Correct Answer-inability of V-Y plasty to correct the deformity adequately When is midstance phase of gait? - Correct Answer-opposite side toe off.