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\begin{document}

\title{The Effect of Nasopharyngeal Ventilation on the Detection Rate of
Colorectal Polyps in Two Hundred Middle-Aged and Elderly Overweight
Patients}



\author[1]{Zhaomeng Zhuang}%
\author[1]{Juanhong Zheng}%
\author[1]{Min Xie}%
\author[1]{Shuo Chen}%
\affil[1]{Wenzhou Integrated Traditional Chinese and Western Medicine Hospital}%


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  \date{May 26, 2024}


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\begin{abstract}
Objective To analyze the effect of nasopharyngeal ventilation on the
detection rate of colorectal polyps in 200 middle-aged and elderly
overweight patients during painless colonoscopy. Methods A total of 100
patients aged 50-75 years, body mass index (BMI) [?]24 or abdominal
circumference [?]85 cm in males and [?]82 cm in females, without underlying
diseases, who underwent nasopharyngeal ventilation during painless
colonoscopy at physical examinations in our hospital from 2019 to 2020,
were selected as the observation subjects (n = 100). The control sample
area was determined by propensity matching according to the basic
information characteristics presented by the observation group. 100
patients received mask oxygen at physical examinations were randomly
selected in the control group (n = 100). Results The verification
analysis after matching indicated that there were no intraoperative and
postoperative adverse reactions, the number of intraoperative limb
movements was less than 1, and the intestinal peristalsis intervals were
more than 5s in both groups, without atropine intervention. Colonoscopy
was performed by senior endoscopists with a withdrawal time of 6-8 min.
When the intraoperative SpO2 was lower than 90\% but higher than 85\%,
the patients in the observation group underwent nasopharyngeal
ventilation while those in the control group received mask oxygen
assisted chin-lift. As a result, the SpO2 was maintained higher than
90\%. The detection rate of colorectal polyps was compared between the
two groups. Conclusion The detection rate of colorectal polyps in the
observation group was higher than that in the control group, with a
statistically significant difference. It may result from the reduction
of ineffective respiratory movement and intraoperative intestinal
peristalsis in middle-aged and elderly overweight patients.%
\end{abstract}%



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