Laparoscopy is a  commonly  performed surgical procedure wherein gas is  insufflated into the  abdominal cavity to facilitate therapeutic and diagnostic surgery via an endoscope Most laparoscopic surgeries involve intraperitoneal insufflation of the abdominal cavity but now   a days extraperitoneal approach for various laparoscopic procedures such as inguinal hernia repair, prostatectomy and ligation of  a varicocele is commonly employed. A large number of elderly patients who often have preexisting cardiorespiratory disease present for laparoscopic extraperitoneal inguinal  hernia repair.

 Insufflation of the abdominal cavity has several adverse respiratory and cardiovascular effects. Changes in respiratory function include decrease in pulmonary compliance , decrease in lung volumes and an increase in peak airway pressure. Major haemodynamic changes include alterations in arterial blood pressure (i.e. hypotension and hypertension), arrhythmias, increased systemic vascular resistance and decreased cardiac output. 

The respiratory and cardiovascular changes seen during intraperitoneal insufflation have been extensively studied.Although, there are a few studies done to study the haemodynamic effects of extraperitoneal insufflation ,there are no such studies done to evaluate the effect of extraperitoneal insufflation on changes in respiratory mechanics. 

The purpose of our study is to examine the effect of extraperitoneal insufflation on changes in respiratory mechanics.