Comparison of efficacy and evaluation of the optimal flow rate for desflurane anaesthesia at three different settings

This study is conducted to evaluate the optimal flow rate for using desflurane at low flows, its efficay for maintenance of depth of anaesthesia and haemodynamic stability. We would like to evaluate that by decreasing the flow rates does the consumption of desflurane actually reduces. We would also like to highlight the safety of oxygenation with low flow rates and the recovery out come of the patient post stopping desflurane.