1. Safely collect the anorectal and internal drainage; avoid viral infection caused by medical personnel touching the patient's excretion;

2. Protect the skin in the perianal area from non-stick stains, infiltrate the skin, and keep the skin clean; prevent patients from perianal ulceration or infection caused by defecation impregnation;

3. The air bag and the anal canal are soft and placed in the anal membrane with a strong sense of comfort;

4. Collect the odor and prevent the odorous gas from emitting; reduce the pollution of the sterile environment of ICU due to defecation;

5. Reduce the patient's mental anxiety;

6. Accurately count the patient's bowel movements;

7. Replace the anal membrane tube once every 5 to 7 days, double air bags to prevent fecal leakage, fecal collection bag for easy observation of defecation volume, safety rubber plug, double insurance;

8. Reduce the workload of patients 'family members and medical staff, maintain patient's dignity, and reduce patients' financial burden.