ABSTRACT : The objective is to study effect of variable respiratory rates on ETCO2.

METHODS : This Research Project was carried out in 30 patients divided in 2 groups: GROUP I - R.R-12-14/min GROUP II - R.R-16-18/min

RESULTS : We observed that end tidal CO2 in group I increased from base level: Mean: 0 minute: 31.73 +_2.40 up to 35.64+- 1.45 in 15 minute and was maintained 37.07 +- 2.20 up to 60 minutes, p value <0.0001. Extremely statistically significant -While in group II from base level Mean: 0 minute: 30.53+-1.46 raised up to 32.20+-1.61 in 15 minute and was maintained 32.40 +- 1.75 up to 60 minutes, p value=0.0036.Statistically significant

CONCLUSIONS : Hence we conclude that by keeping higher respiratory rate, the end tidal CO2 is maintained at acceptable levels as compare to normal recommended respiratory rate in laparoscopic surgeries.

INTRODUCTION: Laparoscopic surgery also called minimally invasive surgery is a modern surgical technique in which operations are performed through small incision usually 0.5 to 1.5 cm. Minimal access surgeries are nowaday’s routinely done likecholecystectomy ,appendicectomy, inguinal hernia repair etc. The media used is carbon dioxide, we have tried variable respiratory rates to reduce the absorbtion of CO2 in the circulation to prevent the occurrence of CO2 narcosis.

AIMS AND OBJECTIVES: The aim of the study is to compare variable respiratory rates to ventilate the patients under General Anaesthesia posted for Laparoscopic surgery. The objective is to study effect of variable respiratory rates on ETCO2.

MATERIAL AND METHODS: This Research Project was carried out in 30 patients divided in 2 groups: GROUP I - R.R-12-14/min GROUP II - R.R-16-18/min

RESULT: -We observed that end tidal CO2 in group I increased from base level: Mean: 0 minute: 31.73 +_2.40 up to 35.64+- 1.45 in 15 minute and was maintained 37.07 +- 2.20 up to 60 minutes, p value <0.0001. Extremely statistically significant -While in group II from base level Mean: 0 minute: 30.53+-1.46 raised up to 32.20+-1.61 in 15 minute and was maintained 32.40 +- 1.75 up to 60 minutes, p value=0.0036.Statistically significant

CONCLUSION: Hence we conclude that by keeping higher respiratory rate, the end tidal CO2 is maintained at acceptable levels as compare to normal recommended respiratory rate in laparoscopic surgeries.