Transversus Abdominis Plane Block Versus Wound Infiltration for Pulmonary Function Preservation Following Laparoscopic Living Donor Nephrectomy

Inclusion Criteria: * Patients who are scheduled to undergo elective LLDN. * Age above 18 years. * Body Mass Index (BMI) above 20 and below 40 kg m-2. * Eligible to sign informed consent. Exclusion Criteria: * Open or hand-assisted surgery. * Known cardiac or pulmonary disease. * Preoperative chronic pain (i.e., fibromyalgia, chronic neuropathic pain). * Contraindication for regional analgesia (i.e., known allergy to LA, skin lesions in the injection site). * Known allergy to one or more of the components of multimodal analgesia (i.e., opioids, paracetamol, tramadol, dipyrone). * Preexisting severe pulmonary disease (i.e., an obstructive lung disease with a forced expiratory volume in the first second \[FEV1\] below 49%, restrictive lung disease with a forced vital capacity \[FVC\] below 49%, pulmonary hypertension). Discontinuing criteria: Participants will be excluded from the analysis if they: * Experience intraoperative bleeding requiring transfusion of more than three units of blood products. * Experience hemodynamic instability requiring postoperative vasopressor or inotropic support. * Require conversion to open surgery. * Require mechanical ventilation after being transferred from the OR to the PACU.