Guidelines for clinical studies with compression devices in patients with venous disorders of the lower limb.

Objectives: The scientific quality of published clinical trials is generally poor in studies where compression devices have been assessed in the management of venous disease. The authors' aim was to establish a set of guidelines which could be used in the design of future clinical trials of compression treatments for venous diseases.

Design: Consensus conference leading to a consensus statement.

Postoperative nausea and vomiting are strongly influenced by postoperative opioid use in a dose-related manner.

We prospectively examined the incidence of postoperative nausea and vomiting (PONV) in a group of 193 elderly surgical inpatients receiving no postoperative antiemetic prophylaxis. Risk factors for PONV and detailed data on postoperative opioid use were recorded. The overall postoperative vomiting (POV) rate was 23.