Comparison of Two Approaches of Quadratus Lumborum Block for Post-operative Analgesia in Radical Cystectomy

This study is comparing two techniques for a nerve block (called a quadratus lumborum block) to see which one better controls pain after bladder removal surgery (radical cystectomy). These nerve blocks use local anesthetic injected near the spine to numb the area and reduce the need for strong pain medications after surgery. **You may be eligible if...** - You are between 40 and 70 years old - You are scheduled for radical cystectomy (bladder removal surgery) - Your BMI is between 20 and 30 - You are in reasonable general health (ASA class I–III) **You may NOT be eligible if...** - You refuse to participate - You have a known allergy to local anesthetics - You have a blood clotting disorder or low platelet count - Your BMI is above 30 - You have an infection at the injection site - You have chronic pain or are regularly taking opioid pain medications - You took any pain medication within 24 hours before surgery Talk to your doctor to see if this trial is right for you.