The goal of this observational, quality improvement study is to compare the effect of a dose of morphine given during gall-bladder removal surgery. The main questions to answer are:

• Do participants, who are given given a dose of morphine during gall-bladder removal surgery, experience less pain after surgery?
• Does a dose of morphine during gall-bladder removal surgery cause more side effects? The investigators will compare the effects of two types of anesthesia: a) anesthesia without morphine during surgery, and b) anesthesia with morphine during surgery.

The investigators will use Redcap secure web application (via Open Patient Data Explorative Network, a subsidiary under University Hospital of Odense, Denmark) for data collection and data management.

No sample size has been collected as per the observational design. The investigators expect to include an equal number in each study arm, as there has been no indication of change in indications for surgery type.

The investigators expect to use students T-test for comparison of groups. If possible logistic regression analyses will be undertaken.

Inclusion Criteria:

• patients who have had elective laparoscopic cholecystectomy/planned gall-bladder removal surgery

Exclusion Criteria:

• age limit as above
• patients unable to give consent to anesthesia
• patients unable to participate in pain scoring
• patients with chronic pain syndromes, characterized by patients receiving regular analgesic treatment and patients with active or previous contact to pain clinic)
• patients with active or previous substance abuse
• emergency surgery

Surgery performed at Hospital og South West Jutland, Esbjerg in main operating facilities.

At this time implications of answering in the affirmative are unknown, and description of shared individual participant data (IPD)s cannot be done yet.

However, the investigators fully expect to share anonymized IPD in order to be able to publish the results ogf the study in a peer reviewed journal.