单词	preoperative
释义	preoperative /priːˈɒp(ə)rətɪv / adjective Denoting, administered in, or occurring in the period before a surgical operation.A nurse practitioner performs the preoperative history and physical examination.... A nasogastric tube was placed, and preoperative antibiotics were administered. Prevention of postoperative infection begins in the preoperative period. Derivatives preoperatively adverb ... As a result, all women who are considered at risk for possible pregnancy are instructed to have a pregnancy test performed preoperatively. All patients routinely receive a prophylactic dose of intravenous antibiotics preoperatively. The use of aspirin preoperatively is shunned by surgeons in noncardiac surgery.
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