The investigators want to test the hypothesis that the addition of a recruitment manoeuvre to a low pressure pneumoperitoneum will lead to an additional reduction in postoperative pain. Therefore the investigators will conduct a prospective randomized controlled, single blind trial.

Two groups:

1. A cholecystectomy at a low pressure pneumoperitoneum (8-10 mmHg)
2. A cholecystectomy at a lowpressure pneumoperitoneum (8-10mmhg) and at the end a pulmonary recruitment manoeuvre (5 sec at max 40 cmH2O).

Inclusion Criteria:

• ASA I and II

Exclusion Criteria:

• refusal to give consent
• cholecystitis
• BMI above 35
• intolerance to one of the pain medication
• pregnancy