Endoscopic procedures like ERCP and colonoscopy are common diagnostic and therapeutic interventions used to visualize and treat conditions within the gastrointestinal tract. These procedures involve the insertion of a flexible tube equipped with a camera through the mouth (ERCP) or rectum (colonoscopy), allowing physicians to examine and address various gastrointestinal issues. However patient needs to be under adequate depth of anaesthesia to allow smooth passage of endoscope.

Total intravenous anaesthesia(TIVA) with Fentanyl,propofol and Dexmeditidone,  often  used for endoscopic procedures, offers several advantages, such as precise control of drug administration, rapid onset and offset of anaesthesia, and a reduced risk of postoperative complications. Monitoring of patients during such procedures is of utmost importance to ensure their safety and well-being.

During endoscopic procedures, the medications used  can have significant effects on the patient’s respiratory function. Capnography is a non-invasive method of measuring end-tidal carbon dioxide (EtCO₂) and  for real-time respiratory monitoring. Changes in EtCO₂ levels can signal alterations in respiratory rate, tidal volume, and overall respiratory function.

In the present study we aim to study variations in End tidal carbon dioxide(EtCO₂) values in endoscopic procedure like ERCP and colonoscopy which are done under total intravenous anaesthesia(TIVA). All patients who are undergoing endoscopic procedures like ERCP and colonoscopy will be considered for this study. Standard monitors like Electrocardiography, Blood pressure(BP) monitor will be attached to patient. A nasal canula with an sampling port will be connected to bedside monitor that displays a time based capnogram and  EtCO₂values (in mm Hg), respiratory rate.

Incidence of respiratory depression, severe hypoxia, endoscopist satisfaction and interventions needed during endoscopic procedures done under total intravenous anaesthesia (TIVA) shall be looked for.