Continuous Bloodsugar Monitoring System With a Sensor Compared to Fingerstick Bloodsugar Monitoring

Inclusion Criteria: * Hospitalized patients (≥ 18 years old) in surgical wards * Glucose measurements at least 4 times (OUH) and 3 times (SUH) daily for at least three days, prescribed by surgeon * Expected hospitalization for at least three days * Communicates in Danish * Signed a declaration of consent to study participation * At risk of hypo- and hyperglycemia (with or without a diabetes diagnosis) * Specific for substudy 4 inclusion criteria as above with the following add on: Patients being treated with insulin at discharge and patients residing within the OUH admission area. Exclusion Criteria: * Cognitively impaired patients * Indication for glucose monitoring solely because of parenteral nutrition treatment * Patients admitted with a CGMS * Patients from the point-of-care fingerstick capillary glucose monitoring group cannot be included in the continuous glucose monitoring system group Eligibility criteria solely for substudy 7 Inclusion Criteria: * Nursing staff with at least one month of experience with both point-of-care fingerstick capillary glucose monitoring and continuous glucose monitoring system and are registered nurses or certified nursing assistants