Good surgical conditions are crucial for an optimal surgery result and safe procedure.
Minimal blood loss in the surgical field is one of the most important conditions to maintain
a good visualization, especially in surgeries with a small surgical field such as a FESS
(functional endoscopic sinus surgery). The perioperative blood loss is determined by the main
arterial and venous pressure, the local pressure and the capillary vascular filling pressure.
It has been proposed that propofol is a venodilator, which increases the blood flow, but
decreases the capillary pressure. On the contrary, sevoflurane might act mainly on the
arterioles, which causes an increase in the capillary pressure. In a previous study it has
been demonstrated that despite blood pressure maintenance, propofol causes less bleeding
during spinal surgery than sevoflurane.
The main aim of this study was to compare both anaesthetics on the perioperative bleeding and
haemodynamics during FESS. Secondary, the postoperative nausea, vomiting, pain scores,
surgery duration and length of stay at the post-anesthesia care unit will be evaluated.