1. Background and research purpose Colorectal cancer has been ranked first in the nation's cancer incidence for 11 consecutive years. Clinically, the surgical treatment of rectal cancer is more difficult than that of colorectal cancer. On the one hand, it is the anatomical location factor. Unlike colorectal cancer, which is located in the abdominal cavity, rectal cancer is located in the narrower pelvic cavity with many bones surrounding it. In particular, the pelvic cavity of men is smaller than that of women, so the space available for surgery is relatively smaller than that of the large intestine. Cancer is much less. On the other hand is the consideration of preserving the anus. When removing a tumor that grows in the colon, there is basically no question of whether to preserve the anus or not, because the large intestine is very long. However, in order to clean the tumor, the doctor will leave a certain safe distance between the front and rear ends of the tumor, that is, an extra 5-10 cm of cut. However, for rectal tumors, most clinically patients want to preserve the anus. Therefore, the current safe distance from the end of the tumor during rectal cancer resection is best to exceed 1 cm.

   Therefore, for patients with rectal cancer, the way of defecation will definitely change after surgery, but the impact will be large or small. It is generally recommended to adjust the diet, such as reducing the intake of fiber such as fruits and vegetables to reduce bowel movements. Some patients think that the uncertainty of dietary restrictions and defecation will affect the quality of life, and they choose permanent artificial anus. Although patients with colorectal cancer usually do not need to remove the anus, they sometimes need temporary artificial anus, such as obstructive colorectal cancer. , First do a temporary artificial anus to help defecation, the purpose is to reduce pressure, let the swollen belly disappear, and then perform surgery to remove the tumor and remove the artificial anus. Although this artificial anus is only temporary, it is not permanent. Among them, about 21% to 70% of enterostomy patients will have some types of complications. These complications are related to stoma dysfunction, insufficient stoma positioning and poor self-care ability. It may cause dermatitis, bleeding, prolapse, necrosis, hernia, edema, waste including leakage, tracheal hernia, stenosis and retraction. Nowadays, advances in mobile technology, such as mobile applications such as smartphones, have created more opportunities for individuals to treat health-related treatments, anytime, anywhere.
2. Research motivation The use of apps as a tool for teaching, nursing and diagnosing skin lesions is a very innovative tool that allows learners to generate interest and motivation to learn more, because the use of apps on mobile devices in the health care sector is higher than that of books. Out of 45%-85%. The purpose of this study is to investigate the effectiveness of using mobile devices to intervene in the self-care ability and quality of life of patients with intestinal stoma.
3. Research design and objects A single blind-experimental design is adopted. First, those who meet the acceptance criteria and are willing to participate in the research are selected and assigned to the experimental and control groups by random assignment by the computer random number table. It is estimated that 2 people will be needed Nursing staff were admitted in the rectal anal treatment room. Participants were randomly assigned to receive routine discharge care and mobile device guidance or routine outpatient follow-up. Data were collected before the patient was discharged, 1 month, 2 months and 4 months after discharge . The structured questionnaire is filled in by the patient or the researcher.
4. statistical methods Descriptive statistics, including frequency distribution and percentage, average and standard deviation, median and interquartile range, and other data to describe the distribution of data; first use the Kolmogorov-Smirnov test to determine whether the data conform to normality Distribution; univariate analysis adopts independent-sample t test or Mann-Whitney U test to compare the difference between the experimental group and the control group in the continuous variables collected, Chi-square test (chi-square test) or Fisher's exact test (Fisher's exact test) compares the difference between the categorical variables collected in the experimental group and the control group; further, binary logistic regression and stepwise regression are used. Regression screening mode method is used to analyze multiple variables to find out the important explanatory factors related to the involvement of mobile devices in personal attributes, self-care ability and quality of life.