The primary aim of the present study is to examine the effect of a "structured follow-up intervention" to be performed in the first three months after PD on blood glucose. The exploratory aim of the study is to examine the effect of the "structured follow-up intervention" to be performed in the first three months after PD on patient outcomes (mortality, rehospitalization and having surgery, wound site complications, bile leakage, delayed gastric emptying, pancreatic fistula, myocardial infarct, cardiac arythmia, pneumonia, intraabdominal abscess, bleeding and pain) and the quality of life. The secondary aim of the study is to evaluate the factors affecting glucose levels in three months after PD by using data mining. Data mining will allow evaluation of all the factors affecting glucose levels by using detailed blood glucose predictors obtained through continuous glucose monitoring after PD. The study has a single-center, randomized, controlled, single-blind design. The study sample will include 40 patients with PD. The allocation ratio will be 1:1. Since being diagnosed as diabetes before surgery is an important variable, block randomization will be performed depending on whether the patients have the diagnosis of diabetes.

The primary aim of the present study is to examine the effect of a "structured follow-up intervention" to be performed in the first three months after PD on blood glucose. The exploratory aim of the study is to examine the effect of the "structured follow-up intervention" to be performed in the first three months after PD on patient outcomes (mortality, rehospitalization and having surgery, wound site complications, bile leakage, delayed gastric emptying, pancreatic fistula, myocardial infarct, cardiac arythmia, pneumonia, intraabdominal abscess, bleeding and pain) and the quality of life. The secondary aim of the study is to evaluate the factors affecting glucose levels in three months after PD by using data mining. Data mining will allow evaluation of all the factors affecting glucose levels by using detailed blood glucose predictors obtained through continuous glucose monitoring after PD. The study has a single-center, randomized, controlled, single-blind design. The study sample will include 40 patients with PD. The allocation ratio will be 1:1. Since being diagnosed as diabetes before surgery is an important variable, block randomization will be performed depending on whether the patients have the diagnosis of diabetes.

Inclusion Criteria:

The inclusion criteria for the particioants were; being over 18 years of age, being a smartphone user compatible with the Dexcom G6 application, having an internet connection, having a Mini Mental Test result of over 22 points for educated individuals and over 19 points for uneducated individuals, being willing to participate in the study, and having undergone pancreaticoduodenectomy.

In the study, "able to swallow table" is not eligibility criteria due to tablet (medication) adherence is not assssed In the study, patients with and without preoperative diabetes mellitus type II were included in the sample. Block randomization was performed according to the presence of DM. Therefore, the presence of diabetes is not an exclusion criterion.

In the literature, thyroid disease has not been identified as an exclusion criterion in studies related to pancreatogenic diabetes. The endocrinologist involved in this project did not find it necessary to add thyroid disease as an exclusion criterion.

Exclusion Criteria:

Exclusion criteria were; having developed sepsis after surgery, having been diagnosed with insulinoma, glycogonoma, ectopic ACTH syndrome before surgery, having been diagnosed with a psychiatric disease, clinical diagnosis of Alzheimer's Disease and being hospitalized.

Participants do not know which group they are in. Both groups are included in the study in parallel. Both groups will be monitored continuously with a glucose device. The researcher will allocate equal time to both groups. Both groups will be called with the same frequency and the same time will be allocated for these interviews. The control group will receive routine post-operative training. The follow-up intervention initiative developed will be applied to the intervention group.