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24 Cards in this Set
- Front
- Back
Are THA dislocation rates higher in males or females?
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Females
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What two populations are at especially high risk of nerve palsy with THA?
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Females with DDH
CMT (Charcot-Marie-Tooth) |
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What THA complication is especially common in patients with prior acetabular fracture?
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Loosening
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If planning a THA after acetabular fracture, what is the advantage of performing ORIF?
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Decreased need for bone graft
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What complication is particularly common in THA patients with contralateral hip fusion?
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Loosening
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Ankylosing spondylitis is associated with what HA two complications? Why is acetabular component positioning often difficult in this patient population?
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Decreased functional outcomes
Increased heterotopic bone Flexion contractures of hip may lead to excess anteversion |
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Why is femoral component positioning often difficult in patients with Paget's disease?
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Femoral bow may lead to varus malalignment
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What THA is particularly likely in patients with severe coxa vara? Why?
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Dislocation
Inadequately restored offset |
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What effect does hip protrusion have on hip center of rotation? What is the implication for THA?
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Moves hip center medially and posteriorly
Must restore normal center of rotation at time of THA |
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What is the likely cause of late failure and sudden pain with modular acetabular components?
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Liner dissociation secondary to failure of locking ring
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What is the benefit of foot/ankle exercises in the prevention of deep venous thrombosis (DTV)
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20% increase in venous outflow
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What three factors are associated with increased mortality for THA after femoral neck fracture?
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Female
Elderly Cemented stem |
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What is the principal THA complication in patients with pathologic fracture?
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Deep infection
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What is the principal THA complication in elderly patients with failed femoral neck ORIF?
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Highest dislocation rates
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What is the principal cause of intraoperative acetabular fracture? What is the treatment if stable? If unstable?
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Under reaming
Stable: ignore Unstable: ORIF |
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What are the three treatment options for intraoperative femoral fracture?
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Longer stem
Cerclage Locking plate |
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AT what intraoperative stage do DVTs start to form?
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At time of femoral canal preparation
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What three intraoperative events are associated with fat embolization?
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Insertion of cemented stem
Relocation of the hip Use of intramedullary guides |
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Most orthopaedic surgical cases present what level of cardiac risk? What does this mean?
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Intermediate cardiac risk
<5% chance of cardiac event |
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Increased cardiac risk is present if patient can't perform __ metabolic equivalent tasks (METs)? Cite three example activities.
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4 METs
Do light house work Climb one flight of stairs Walk on level ground at 4 mph |
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What are the two demonstrated benefits of perioperative beta-blockers?
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Increased survival
Decreased perioperative events |
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What is the best clinical indicator of preoperative nutritional status?
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Arm circumference
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What is the preferred treatment for a malnourished patient at risk of multiorgan failure?
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Enteral protein
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What is Ogilvie"s syndrome? What is its relevance? What is its associated electrolyte abnormality? What is its treatment?
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Cecal distention> 10 cm
Can occur after arthroplasty Associated with hypokalemia Treat with colonoscopic decompression |