Randomized Controlled Trial

Patient well-being after general anaesthesia: a prospective, randomized, controlled multi-centre trial comparing intravenous and inhalation anaesthesia.

Br J Anaesth. 2003 Nov 1; 91 (5): 631-7.
Randomized Controlled Trial

Comparison of ramosetron with ondansetron for prevention of postoperative nausea and vomiting in patients undergoing gynaecological surgery.

Br J Anaesth. 2009 Oct 1;103(4):549-53.
Review

Does supplemental oxygen reduce postoperative nausea and vomiting? A meta-analysis of randomized controlled trials.

Anesth. Analg. 2008 Jun 1; 106 (6): 1733-8.