Inclusion Criteria:  Adults (≥ 18 years) scheduled for laparoscopic colectomy Physical status score ( American Society of Anesthesiologists) ≤ 3 Non-obese (Body Mass Index < 30) Affiliated with a social security plan Having signed an informed consent Normal preoperative electrocardiogram including, but not limited to, a non-extended QTc interval (< 0.45 s in men and < 0.47 s in women).  Exclusion Criteria:  Presence of a contraindication for local anesthesia (injection site infection, coagulopathy) Known allergy to local anesthetics Known renal or hepatic insufficiency Pregnant or breastfeeding women Medical or psychiatric condition that makes communication difficult Chronic use of drugs that interfere with CYP1A2 metabolism of ropivacaine such as fluvoxamine (a potent CYP1A2 inhibitor) Chronic use of opioids or other treatments for chronic pain Chronic use of anti-arrhythmic drug(s) or drugs that can prolong the QTc space such as haloperidol, amiodarone, sotalol, etc. Protected persons defined in the following articles of the public health code:  L. 1121-6: persons deprived of liberty by a judicial or administrative decision, persons hospitalized without consent and persons admitted to a health or social institution for purposes other than research; L. 1121-8: adults subject to a legal protection measure or unable to express their consent; L. 1122-1-2: persons in emergency situations who are unable to give prior consent.  - Patients participating in other research involving the human person.