Risk factors for prolonged postoperative ileus after intracranial tumor surgery

Interventions: Long-term postoperative intestinal obstruction group:none;Non-long-term postoperative intestinal obstruction group:none
Primary outcome(s): gender;age;body mass index;American Society of Anesthesiology Grade;history of diabetes;duration of operation;the amount of sunfentanil administered intraoperatively;intravenous fluid administration;estimated blood loss;whether transfuse suspended red blood cells;whether flatus within postoperative 24 h;the overall in-hospital length of stay;medical cost
Study Design: Cohort study