Patient Reported Outcomes and Different Renal Artery Clamping Techniques During Robot Assisted Kidney Resection

The target population for this study consists of all patients undergoing kidney surgery at Haukeland University Hospital, Norway, with the primary focus being patients undergoing robot-assisted partial nephrectomy. The study has two main objectives. First, the investigators aim to assess whether a flank approach to robot assisted partial nephrectomy may be superior to a trans abdominal approach with regard to postoperative pain, recovery, and quality of life. Second, while conducting this study, the investigators also seek to compare two methods of renal artery clamping during the partial nephrectomy procedure. Specifically, the investigators aim to determine whether a technique that reduces the duration of ischemia can be performed without causing an unacceptable increase in blood loss or postoperative complications.

Inclusion Criteria: 1. Signed written informed consent obtained prior to any study specific procedures 2. Patient must be willing and able to comply with the protocol 3. Age \>18 4. Patients scheduled for robot-assisted partial kidney resection with either the trans- or retroperitoneal access 5. Other patients scheduled for surgery for kidney cancer, to be included as control group Exclusion Criteria: 6. Previous kidney surgery on the affected side 7. Preexisting extensive intraabdominal adhesions preventing the use of the transabdominal access 8. Preexisting severe pain condition requiring regular use of opioids adding up to more than equivalent of 10mg po morphine daily 9. Any other physical or mental illness that according to the treating surgeon makes the patient unfit for inclusion in the study 10. Confirmed metastatic renal cancer or any other metastatic cancer.