GOAL-Directed ANalgesia (GOALDAN) (GOALDAN)

Effect of Targeted Analgesia to ANI (Analgesia/ Nociception Index) During General Anesthesia on Immediate Postoperative Pain and Perioperative Hemodynamic: Multicenter Randomized Controlled Study

The primary purpose of GOALDAN study is to demonstrate the superiority of a targeted perioperative analgesic strategy by the ANI over the usual practice on the incidence of immediate postoperative pain. The investigators hypothesized that a prophylactic administration of morphine in patients with risk of postoperative pain determined by the ANI at the end of the intervention would reduce the incidence of immediate postoperative pain and that the targeted analgesia to ANI and minimal alveolar concentration (MAC) of desflurane could improve the perioperative hemodynamic, and the postoperative becoming.

Visits: The patient will arrive in the department the day before the surgical intervention (D-1). During this preoperative visit (D-1), the investigator will preselect potentially eligible patients will offer to participate to this study will give the notice form to the patients will present the research: objectives, benefits and constraints for the patients will check that patients understand the verbally administered Numeric Rating Scale (NRS) for the assessment of the postoperative This verbally administered NRS is routinely presented to all patients at a surgical intervention. The intervention day (D0): The investigator will collect the signed consent form after having ascertained the understanding of the notice form by the patient and checking the inclusion and non-inclusion criteria. The randomization will be done via the eCRF module (allocation group and number) and the preoperative data registration in the eCRF. • Surgical intervention (D0): All patients will receive a usual multimodal analgesia associating level 1 analgesics (acetaminophen, ketoprofen, nefopam) or level 2 (tramadol) administered 30 to 60 min before the foreseeable end of the surgical intervention. All patients will receive 0.1 to 0.2 mg/kg of morphine within the 30 min preceding the end of the surgical intervention according to the usual practice. Once the patient transferred to the recovery room, the assessment of the primary outcome (verbally administered NRS) will be done by the nurse responsible for the patient, when the patient arrives, during the stay and when the patient leaves the recovery room. If the verbally NRS > 3, a morphine titration by IV administration of 2 to 3 mg of morphine will be realised then the verbally NRS will be collected 5 min after, according to the usual practice. This morphine titration will continued until the obtaining of a verbal NRS ≤ 3. As an alternative to this morphine titration, where possible, a peripheral nerve block may be proposed to the patient and performed by the investigator to relieve the patient. If the patient is transferred directly in ICU without being extubated at the end of the intervention and so without transiting by the recovery room, the patient will be excluded from the study.

prospective, single blind, multicenter, randomized, controlled, Analgesia Nociception Index (ANI), Postoperative pain

Randomization in 2 groups 1- control group : patients receiving a general anesthesia with propofol, ketamine and remifentanil with or without curare for the induction, desflurane, remifentanil (curare or not) for the maintenance, the dosage of the anesthetic agents will be decided by the anesthesiologist responsible for the patient based on the usual practice. 2- experimental group : patients receiving a general anesthesia with propofol, ketamine and remifentanil with or without curare for the induction, desflurane, remifentanil (curare or not) for the maintenance, administered according to a specific algorithm. In this group, the remifentanil administration will be piloted by the ANI (50 to 80), as well as the prophylactic administration of morphine at the end of the intervention. Administration of 2mg of morphine immediately before the extubating if ANI<50. And, desflurane will be administered with a targeted purpose of 0.8 to 1.2 MAC.

control group (usual practice): patients receiving a general anesthesia with propofol, ketamine and remifentanil with or without curare for the induction, and desflurane and remifentanil (with or without curare) for the maintenance. The dosage of the anesthetic agent, as well as the prophylactic administration of morphine at the end of the intervention, will be decided by the anesthesiologist.

experimental group: patients receiving a general anesthesia with propofol, ketamine and remifentanil with or without curare for the induction, and desflurane and remifentanil (with or without curare) for the maintenance, as well as the prophylactic administration of morphine at the end of the intervention, will be administered according to the ANI. - In addition, desflurane will be administered with a targeted purpose of minimal alveolar concentration (MAC).

Anesthesic agent guided by ANI (Interventional Group) The remifentanil administration will be piloted by the ANI, as well as the prophylactic administration of morphine at the end of the intervention.

Administration of the lowest effective concentration of desflurane (Interventional Group) Desflurane will be administered with a targeted purpose of minimal alveolar concentration (MAC).

immediate maximum postoperative pain in recovery room defined by a score > 3 on a verbally administered numeric rating scale (NRS) variating from 0 to 10.

Once the patient transferred to the recovery room, the assessment of the primary outcome (verbally administered NRS) will be done by the nurse responsible for the patient, when the patient arrives, during the stay and when the patient leaves the recovery room

The patient chooses on a scale numeric range a number between 0 and 10 to characterise the intensity of the pain during the first postoperative day : 0 if the pain is mild (better outcome), 10 if the pain is severe (worse outcome).This numeric rating scale will be assessed every 6 hours during the 24 first hours (H0 = arrival hour at the recovery room).

The patient chooses on a scale numeric range from 0 to 10, a number which characterises the overall satisfaction of pain management : if the pain management is correct (10) or if the pain management is not correct (0).

will be compared between groups by test t of Student or test not parametrize of Mann-Whitney if the conditions of the test t are not respected (study of the normality, homoscedasticity studied by test of Fisher-Snedecor). The results will be expressed in terms of size of effect and reliable interval in associated 95 %. These analyses can be secondly completed, in multivariate situation, by models of regression of linear type; covariables will be considered with regard to the clinical relevance and the results of analyses univariate preliminary. The results will be expressed in terms of coefficients of regression and reliable intervals in associated 95 %.

In both groups, the prevention of the nausea and the vomitings will be administered according to the current recommendations (dexamethasone 4 mg and droperidol 0,625-1,25 mg it peroperatoire at the patients at risk, defined by a score of Apfel 2). In case of NVPO during the first 24 post-operative hours, the administration of 4 mg of ondansétron will be realized, according to the recommendations.

will be compared between groups by test t of Student or test not parametrique of Mann-Whitney if the conditions of the test t are not respected (study of the normality, homoscedasticity studied by test of Fisher-Snedecor). The results will be expressed in terms of size of effect and reliable interval in associated 95 %. These analyses can be secondly completed, in multivariate situation, by models of regression of linear type; covariables will be considered with regard to the clinical relevance and the results of analyses univariées preliminary. The results will be expressed in terms of coefficients of regression and reliable intervals in associated 95 %.

will be compared between groups by test t of Student or test not parametrize of Mann-Whitney if the conditions of the test t are not respected (study of the normality, homoscedasticity studied by test of Fisher-Snedecor). The results will be expressed in terms of size of effect and reliable interval in associated 95 %. These analyses can be secondly completed, in multivariate situation, by models of regression of linear type; covariables will be considered with regard to the clinical relevance and the results of analyses univariées preliminary. The results will be expressed in terms of coefficients of regression and reliable intervals in associated 95 %.

Test of chi² or exact test of Fisher if necessary. Secondly, this analysis can be completed, in multivariate situation, by a mixed generalized linear model of logistic type allowing to take into account variability inter and intracentre. Covariables will be considered with regard to the clinical relevance (other treatments, use of vasopresseurs continuous, type of surgery) and results of analyses univariate preliminary. The results will be expressed in terms of reports of the quotations and the reliable intervals in associated 95 %.

incidence of postoperative complications on the first and seventh postoperative days for hospitalized patients using Post-Operative Morbidity Survey (POMS).

Post-operative complications in the first and seventh day post-operative will be compared by test of chi² or where necessary, by the exact test of Fisher. Secondly, this analysis can be completed, in multivariate situation, by a mixed generalized linear model of logistic type allowing to take into account variability inter and intracentre. Covariables will be considered with regard to the clinical relevance (other treatments, use of vasopresseurs continuous, type of surgery) and results of analyses univariées preliminary. The results will be expressed in terms of reports of the quotations and the reliable intervals in associated 95 %.

Duration of hospitalization will be compared between groups by test t of Student or test not paramétrique of Mann-Whitney if the conditions of the test t are not respected (study of the normality, homoscédasticité studied by test of Fisher-Snedecor). The results will be expressed in terms of size of effect and reliable interval in associated 95 %. These analyses can be secondly completed, in multivariate situation, by models of regression of linear type; covariables will be considered with regard to the clinical relevance and the results of analyses univariées preliminary. The results will be expressed in terms of coefficients of regression and reliable intervals in associated 95 %.

The survival to day 28 comment surgery will be estimated(esteemed) by curve of Kaplan-Meier and compared between groups of randomization by test of the log-rank in univariate situation and model of Cox in multivariated analysis. The results will be expressed in terms of relationship of immediate risks and reliable intervals in associated 95 %.

Inclusion Criteria: 18≤ Age <65 years old Patient operated on a scheduled surgery under general anesthesia Patient with a American Society of Anesthesiologists (ASA) score of I to III Patient having given his consent in the manner described in Article L1122-1-1 of the Public Health Code Patient affiliated with a social security regimen or beneficiary of such a regimen Exclusion Criteria: general anesthesia without extubating (laryngeal mask) neuraxial preoperative regional anesthesia (epidural or rachianalgesia) opioid-free anesthesia preoperative peripheral nerve block with analgesic aim (infiltration of a local surgical anesthetic or transversus abdominis plane block-TAP block-authorized) arrhythmia or the presence of a pacemaker ambulatory surgery cardiac or cerebral surgery obstetrical surgery (caesarean) surgery performed with neuraxial regional anesthesia or peripheral anesthesia alone surgery performed in prone position urgent surgery endoscopic procedure or interventional radiology chronic pain treated with opiates expected surgery duration < 1h pathology of the autonomic nervous system (epilepsy, history of transient attack or stroke, paraplegia, hemiplegia, orthostatic hypotension, autonomic dysfunction) Patient with cardiogenic or septic shock Continuous infusion of vasoactive agents (ephedrine, phenylephrine, adrenaline, or noradrenaline) Postoperative transfer planned in intensive care unit (intubated patient) after surgery Person under tutorship or curatorship Pregnancy Breastfeeding

Michalot A, Bazin JE, Richebe P, Allaouchiche B, Boselli E. Effect of GOAL-Directed ANalgesia using ANI (Analgesia/Nociception Index) during general anesthesia on immediate postoperative pain and intraoperative hemodynamics in adult patients (GOALDAN study): a study protocol for randomized, controlled, multicenter trial. Trials. 2022 Apr 25;23(1):353. doi: 10.1186/s13063-022-06273-1.