Abstract:Objective To explore the influencing factors of gastric cleanliness during magnetically controlled gastric capsule endoscopy, in order to improve the diagnostic efficiency of magnetic control capsule gastroscopy.Methods A retrospective analysis was conducted on the clinical data of 130 patients who underwent magnetically controlled gastric capsule endoscopy from January 2023 to December 2024. According to whether the cleanliness inside the stomach was qualified, they were divided into the qualified cleanliness group (78 cases) and the unqualified cleanliness group (52 cases). The differences in gender, age, body mass index (BMI), examination indications, smoking, drinking, diabetes and Helicobacter pylori (Hp) infection between the two groups of patients were compared. The possible influencing factors were included in the binary multivariate Logistic regression analysis to identify the independent risk factors affecting the cleanliness of the stomach during magnetically controlled gastric capsule endoscopy.Results Univariate analysis revealed that there were statistically significant differences in BMI, symptoms, Hp infection and gastric examination time between the two groups of patients (P < 0.05). Further Logistic binary regression analysis revealed that Hp infection was an independent risk factor affecting the cleanliness of the stomach (OR^ = 6.170, 95%CI: 2.635 ~ 14.446, P < 0.01). The time required for qualified cleanliness group to complete the gastric examination was (29.44 ± 10.22) min, which was significantly shorter than that of the unqualified cleanliness group (39.78 ± 18.93) min, and the qualified rate of proximal gastric cleanliness was significantly lower than that of distal gastric (P < 0.01).Conclusion Hp infection is an independent risk factor affecting the cleanliness of the stomach during magnetically controlled gastric capsule endoscopy. The qualified rate of cleanliness in the proximal stomach is lower than that in the distal stomach. For examinees infected with Hp, a more proactive gastric preparation plan should be adopted, such as a pretreatment plan with a double dose of pronase, postures and activities after taking the medicine, and restricted swallowing combined with gargling before the examination, to improve the cleanliness of the stomach.