Abstract:To explore the application value of alternate endoscopy in transnasal intestinal obstruction catheterization. Methods 60 cases of ileus intended to be treated by nasointestinal small intestine decompression tube were randomly divided into experimental group and control group, 30 cases in each. Patients in the experimental group were treated with alternate endoscopy. Patients in the control group were treated with the traditional endoscopic transnasal small intestine decompression tube. The success rate of one-time catheterization, catheterization time, catheterization rate and tolerance score were compared between the two groups. Results 29 patients in the experimental group were successfully treated with disposable catheter, while only 21 patients in the control group were successfully treated with disposable catheter. The success rate of the experimental group was 96.67%, significantly higher than that of the control group (70.00%). There was significant difference in the success rate of one-time catheterization between the two groups. The catheterization time of the experimental group was (15.00 ± 5.25) min, significantly less than that of the control group which was (19.45 ± 6.75) min. The tolerance score of the experimental group was (1.25 ± 0.05), lower than (1.85 ± 0.60), with statistically significant differences (P < 0.05). Conclusion The application of alternate endoscopy in transnasal small intestine decompression tube can improve the success rate of catheterization, reduce the time of catheterization, and obviously reduce the discomfort during the operation without complications.