QLB After Nephrectomy

Effectiveness of Quadratus Lumborum Block After Nephrectomy

Oxycodone consumption and postoperative pain intensity in patients undergoing nephrectomy procedures. Of all study participants, 50% will obtain quadratus lumborum block (QLB).

Patients undergoing nephrectomy procedures will be allocated to one of the study arms. At the end of an operation, still under general anesthesia, 50% patients will obtain QLB with ropivacaine.

Ultrasound-guided QLB will be performed on the side of surgery with 0.375% ropivacaine solution (0.2 mL per kg).

Every patient will get patient-controlled analgesia pump with oxycodone in the postoperative period.

Postoperative pain will be measured with VAS (visual-analogue scale) 2, 4, 8, 12 and 24 hours after the end of the operation. 24 -hours period.

At the 1, 3, 6 months patients will be interviewed by phone to assess neuropathic pain. Neuropathic Pain Symptom Inventory (NPSI) will be used.

Inclusion Criteria:

• obtained consent
• nephrectomy procedure

Exclusion Criteria:

• coagulopathy allergy to local anesthetics depression, antidepressant drugs treatment epilepsy usage of painkiller before surgery addiction to alcohol or recreational drugs