ESP Block VS Intrathecal Opioid After Laparoscopic Colorectal Surgery

Inclusion Criteria: * Patients undergoing an elective laparoscopic colorectal procedure at Indiana University Hospital or Methodist Hospital * ASA Class 1, 2, 3 (American Society of Anesthesiologists physical status classification system) * Age 18 to 80 years (male or female) * BMI \< 40kg/m2 * Desires regional anesthesia for postoperative pain control Exclusion Criteria: * Any contraindication for neuraxial analgesia or ESP block procedure * Contraindications for neuraxial analgesia include: Elevated intracranial pressure (except in cases of pseudo-tumor cerebri), infection at the site of injection, lack of consent from the patient, patient refusal, true allergy to any drug used in the spine, and uncorrected hypovolemia. * Contraindications for ESP block procedure include: Infection at the site of injection, patient refusal, true allergy to any of the drugs used in the block, and lack of patient consent. * Any patient undergoing a laparoscopic abdominoperineal resection. * Any physical, mental or medical conditions which, in the opinion of the investigators, may confound quantifying postoperative pain resulting from surgery. * Known true allergy to the study medications (morphine, bupivacaine, decadron, Tylenol, Celebrex) * Takes over 30 mg of oral morphine equivalents daily * Any history of substance abuse in the past 6 months * End stage liver disease, end stage renal disease * Body weight of \< 50 kg