Thoracic Epidural Analgesia or Four-Quadrant Transversus Abdominus Plane Block in Reducing Pain in Patients Undergoing Liver Surgery

Inclusion Criteria

• Patients undergoing open liver resection without bowel resection/anastomosis for malignancy at MD Anderson Cancer Center
• Patients must be 18 years of age or older. There is no upper age limit.
• Patients must sign a study-specific consent form
• Platelets >= 100,000/ml (within 30 days of surgery)
• International normalized ratio (INR) =< 1.5 (within 30 days of surgery)
• Activated partial thromboplastin time (aPTT) =< 40 (within 30 days of surgery)
• Patients must have no fever or evidence of infection or other coexisting medical condition that would preclude epidural placement

Exclusion Criteria

• Evidence of severe uncontrolled systemic disease or other comorbidity that precludes liver surgery
• History of chronic narcotic use, defined as 30 days or more of preoperative daily narcotic use, measured from the date of surgery
• Anaphylaxis to local anesthetics or narcotics
• Previous or current neurologic disease affecting the lower hemithorax or below
• Major open abdominal/thoracic surgery in the previous 30 days under general anesthesia
• Technical contraindications to epidural placement: previous thoracic spinal surgery or local skin or soft tissue infection at proposed site for epidural insertion
• Use of therapeutic anticoagulation within 5 days of surgery (not including venous thromboembolism prophylaxis)
• Known bleeding diathesis or coagulopathy
• Psychiatric (untreated or poorly controlled schizophrenia, major depression, or bipolar disorder), or communication (language) barrier that would preclude accurate assessment of postoperative pain and/or ability to answer questionnaires (need to be able to read, comprehend, and answer questions)
• Inability to comply with study and/or follow-up procedures
• Patient refusal to participate in randomization
• Pregnant women are excluded from this study; women of childbearing potential (defined as those who have not undergone defined as those who have not undergone a hysterectomy or who have not been postmenopausal for at least 12 consecutive months) must agree to practice adequate contraception and to refrain from breast-feeding, as specified in the informed consent
• Patients with obvious unresectable disease prior to signing informed consent
• Patients with previous ventral hernia repair, cosmetic abdominoplasty or anterior abdominal wall reconstruction