Evaluation of the Effect of Two Types of Fluid in the Recovery From Anaesthesia. Voluven 6% v Hartmanns

Avoiding nausea and vomiting is one of the most important for patient comfort and satisfaction, and preventing unplanned overnight stays in hospital following surgery. Studies have shown that increased amounts of intravenous fluid during surgery prevent nausea and vomiting after operations. This effect lasted for up to 48 hours after the surgery. Other unpleasant side effects of dehydration that delay recovery including headaches and dizziness can be prevented with fluid treatment during the operation. It is unclear if this effect happens with all types of fluid. The investigators propose to examine the effect of 2 types of intravenous fluids on recovery from anaesthesia. Each group will be given a different fluid while using our usual anaesthetic technique. The investigators will ask questions about nausea and vomiting after surgery (primary outcomes), and other factors relating to patient comfort such as headache and dizziness (secondary outcomes)