This study investigate associations between mild hypothermia (patients' core temperature ≤ 36.0 degrees Celsius) and intra-operative blood loss and surgical site infections (SSI) in patients undergoing major abdominal surgery.

This study evaluates associations between patients' core temperature during surgery and intra-operative blood loss, and to SSI. Additionally, the investigators observe the use of hypothermia prevention measures in operating theaters, use of surgical safety checklists. SSI is registered at discharge from hospital and up to 30 days post-discharge.

The goal of the study is to contribute to focus on prevention of even mild hypothermia in surgery.

This study is of interest for healthcare personnel as operating room nurses, surgeons, nurse anaesthetists, anaesthesiologists, ward nurses, post anaesthetic care unit nurses, and other healthcare staff involved in the in-hospital surgical pathway.

Inclusion Criteria:

• Patients (men or women) above 18 years, undergoing abdominal or gynecological surgery with laparotomy or laparoscopy.

Exclusion Criteria:

• Surgical procedures with intentional reduction of core temperature. Patients under the age of 18.

The study population consist of patients undergoing abdominal or gynecologic laparatomy or laparoscopy in a tertiary teaching hospital in Norway.

Anonymous individual data is allowed to share, thought such request must be approved by the REK West. Data will be available from the primary investigator.