preoperative fasting
... that patients practice preoperative fasting before an operation in order to prevent pulmonary aspiration of stomach contents?
... that patients practice <b id="mwA0A"><a href="./Preoperative_fasting" id="mwA0E" rel="mw:WikiLink" title="Preoperative fasting">preoperative fasting</a></b> before an <a class="mw-redirect" href="./Surgery_operation" id="mwA0I" rel="mw:WikiLink" title="Surgery operation">operation</a> in order to prevent <a href="./Respiratory_system" id="mwA0M" rel="mw:WikiLink" title="Respiratory system">pulmonary</a> aspiration of stomach contents?