To analyze the clinical value and significance of partial pressure of end-tidal carbon dioxide(PETCO₂)monitoring during gastrointestinal endoscopic anesthesia.

A total of 200 patients who underwent gastroscopy and colonoscopy under general anesthesia in Department of Endoscopy of Shandong Qianfoshan Hospital from March 2020 to May 2020 were selected and randomly divided into experimental group(oxygen was inhaled via nasal catheter, and pulmonary ventilation was monitored by sidestream PETCO₂ monitoring device, n=100)and control group(only oxygen was inhaled via nasal catheter, n=100). Dezocine 1-3 mg and propofol 1.5-3 mg/kg were administrated 2 minutes before the lens was placed.After the eyelash reflex disappeared, and the mandible did not respond, the endoscope was inserted.After the lens was successfully placed, propofol was continuously pumped at 3-5 mg/kg/h until the end of the operation.The anesthesia effect and the incidence of complications were compared between the two groups.

There was no significant difference in age, gender, body mass index, ASA grade, anesthesia induction time and endoscopic examination time between the two groups(P>0.05). The incidence of hypoxemia, the frequency of mask pressurization, the rate of nausea and vomiting, the dosage of propofol and the recovery time in the experimental group were lower than those in the control group(P<0.05). The frequency of apnea, the incidence of jaw-lift and chest compressions to aid breathing in the experimental group were higher than those in the control group(P<0.05).

The monitoring of PETCO₂ can detect the status of lung ventilation, guide clinical intervention, reduce complications, shorten the recovery time, and improve the quality of gastrointestinal endoscopic anesthesia.