Abstract：Objective To study the effect of carbon dioxide (CO2) pneumoperitoneum under endoscopy on the use time of CO2
absorber soda lime in anesthesia machine, and provide basis for replacing soda lime in clinical endoscopic pneumoperitoneum
surgery. Methods A total of 193 general anesthesia patients with ASA grade Ⅰ to Ⅲ, aged 18 to 70 years old, without
cardiopulmonary disease, central system disease and non-obesity [body mass index (BMI) <28 kg/m2
], who were admitted
to our hospital from February to August 2021 were randomly selected. The selected patients were divided into endoscopic
pneumoperitoneum group and non-pneumoperitoneum group according to whether CO2 pneumoperitoneum was used for surgery.
When the FiCO2 value of the calibrated monitor reach 5%, the partial pressure of end-tidal CO2 (PetCO2) and arterial blood gas
value of the patients were within the normal and reasonable range, it was the replacement standard of soda lime. The service time
of soda lime was recorded and statistically analyzed. Results The effective use time of sodium lime in pneumoperitoneum group
[(2976.1±158.4) min] was significantly lower than that in non-pneumoperitoneum group [(3870.3±173.1) min], the difference
was statistically significant (P<0.05). The weight of soda lime before and after replacement in the two groups was basically
the same, and difference was not statistically significant (P>0.05). Conclusion The effective use time of soda lime in
endoscopic CO2 pneumoperitoneum under general anesthesia is significantly shorter than that in non-pneumoperitoneum. It is
noteworthy that PetCO2 will rise rapidly after the FiCO2 reaches 5% in CO2 pneumoperitoneum under endoscopy, which narrows the
time safety window of soda lime replacement compared with non-pneumoperitoneum. Once it is found that it needs to be replaced in
time, otherwise the patient will be at risk of hypercapnia.
张庆a，王莉芳a，周闻博b，张亚军a. 腔镜气腹与无气腹手术麻醉机CO2吸收剂的临床比较研究[J]. 中国医疗设备, 2022, 37(11): 156-159.
ZHANG Qinga, WANG Lifanga, ZHOU Wenbob, ZHANG Yajuna. Clinical Comparative Study on CO2 Absorber of Anesthesia Machine for
Endoscopic Pneumoperitoneum and Non-Pneumoperitoneum Surgery. China Medical Devices, 2022, 37(11): 156-159.
