To compare pain relief from a spinal narcotic versus nerve block in patients undergoing laparoscopic surgery for tumors of the large intestine

INTERVENTION: Intervention1: Quadratus Lumborum block bilateral: 20 ml of 0.2 % ropivacaine with 2 mg dexamethasone will be administered between the QL muscle and psoas major with USG guidance on either side Control Intervention1: Intrathecal morphine injection: 2 mcg /kg of morphine not exceeding 200 mcg placed in the subarachnoid space prior to induction of anaesthesia CONDITION: Health Condition 1: C189‐ Malignant neoplasm of colon, unspecified PRIMARY OUTCOME: Requirement of opioid analgesic post operatively.Timepoint: 24 h following shift to the ICU SECONDARY OUTCOME: Intra‐operative analgesic requirement ; Hemodynamic responses to stimulus ; Adverse effects Weakness paresthesia,nausea and vomiting ; Post operative pain scores ; Postoperative hemodynamics ; Timepoint: Time points hemodynamics Intraoperatively ; Port Insertion: Tp ; 10 minutes afterpnuemoperitoneum T pn ; Specimen retrieval Tr ; Closure T end ; Time points post operatively ; Pain by NRS ; 0, 6, 12, 18 and 24 h postop a ; HR and MAP ; 0, 6, 12, 18 and 24 h post‐op. INCLUSION CRITERIA: All elective patients presenting for laparoscopic colorectal surgery