A Study To Establish The Efficacy Of Pressure Volume Loop Spirometry Technique For Endotracheal Tube Cuff Inflation For Patients Posted For Laparoscopic Surgeries Under General Anaesthesia.

Endotracheal intubation is routinely performed during general anaesthesia. When the cuff on the ETT is inflated, it is crucial to maintain a proper cuff pressure because both high or low cuff pressure can lead to serious adverse events. Either overinflation causes ischaemic changes or underinflation of the cuff may lead to risk of aspiration. Pressure volume loop (PV-L) is a real time continuous pulmonary graph incorporated in anaesthesia workstation. It has been shown that Pressure volume loop (PV -L) provides adequate seal. The advantage of using PV -L than other methods is that it requires low volume of air & less cuff pressure compared to standard techniques of cuff inflation. Changes in respiratory parameters will be recorded during pre insufflation, following 2 mins of pneumoperitoneum with the help of  PVL spirometry by evaluating the presence of air leak around the ETT cuff and to ensure that it provides adequate seal in patients undergoing for laparoscopic surgeries.