Cardiovascular Effects of Muscle Relaxation During Laparoscopic Surgery

Inclusion Criteria: ASA 1-3; * Scheduled for lower laparoscopic abdominal surgery; * Ability to give oral and written consent; Exclusion Criteria: * Known or suspected neuromuscular disorders impairing neuromuscular function; * Allergies to muscle relaxants, anesthetics or narcotics; * A (family) history of malignant hyperthermia; * Women who are or may be pregnant; * Preexisting cardiac disease (any); * Untreated or uncontrolled hypertension; * COPD gold 3 or higher * Preexistent esophageal pathology (stricture, tumor, diverticulum) * Any increased risk factor for upper gastro intestinal tract bleed: * History of GI surgery; * History of GI bleed; * Esophageal varices; * Gastric or esophageal inflammation; * Severe thrombocytopenia (less than 50k) or severely elevated INR (\>4).