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Comparison of M-TAPA and External Oblique Intercostal Block for Intraoperative Opioid Consumption in Laparoscopic Cholecystectomy (MTAPA-EOI)

6 juin 2026 mis à jour par: İsmet Uluhan, Ankara Etlik City Hospital

Comparison of M-TAPA and External Oblique Intercostal Plane Block on Intraoperative Analgesia and Opioid Consumption Guided by Skin Conductance Algesimeter in Laparoscopic Cholecystectomy

This prospective observational study is designed to evaluate the effects of modified thoracoabdominal nerve block through perichondrial approach (M-TAPA) and external oblique intercostal (EOI) plane block on intraoperative analgesia and opioid consumption in patients undergoing elective laparoscopic cholecystectomy. Abdominal wall blocks are widely used to improve perioperative analgesia; however, their impact on intraoperative opioid requirements when guided by objective nociception monitoring remains unclear.

All patients will receive standardized general anesthesia. Intraoperative analgesia will be guided using the Skin Conductance Algesimeter (SCA), which reflects sympathetic nervous system activity by measuring fluctuations in skin conductance. The SCA parameter "peaks per second (PPS)" will be used to assess nociceptive responses. Remifentanil infusion will be titrated according to SCA values to maintain adequate analgesia. Dose adjustments will be performed at predefined intervals, and changes will be considered valid only if sustained for a minimum duration.

Patients will receive either M-TAPA or EOI block as part of routine clinical practice. The choice of block will not be influenced by the investigators, in accordance with the observational design of the study. Data will be collected prospectively during the intraoperative period and postoperative follow-up.

The primary outcome of the study is the time-weighted average intraoperative remifentanil infusion rate (µg/kg/min). Secondary outcomes include total intraoperative remifentanil consumption (µg/kg), intraoperative hemodynamic parameters (heart rate and mean arterial pressure), frequency of deviations in SCA values from the target range, postoperative pain scores assessed using a numeric rating scale (NRS), time to first analgesic requirement, and total rescue analgesic consumption.

Perioperative analgesia will be standardized. All patients will receive intravenous dexketoprofen toward the end of surgery as part of routine clinical practice. Rescue analgesia will be provided with intravenous dexketoprofen when clinically indicated. Additional outcomes include postoperative nausea and vomiting and perioperative complications.

This study aims to provide objective data on the opioid-sparing effects of different abdominal wall block techniques when intraoperative analgesia is guided by nociception monitoring. The findings may contribute to optimizing analgesic strategies and improving perioperative pain management in laparoscopic surgery.

Aperçu de l'étude

Statut

Recrutement

Les conditions

Description détaillée

This prospective observational study evaluates intraoperative opioid requirements under nociception-guided analgesia in patients undergoing elective laparoscopic cholecystectomy. Analgesic management is guided by the Skin Conductance Algesimeter (SCA), which reflects sympathetic activation through fluctuations in palmar skin conductance. The SCA-derived parameter "peaks per second (PPS)" is used as a real-time surrogate of nociceptive activity.

General anesthesia is administered according to institutional standards. Remifentanil is delivered via continuous infusion and titrated in response to SCA values to maintain a predefined nociception-analgesia balance. Dose adjustments are performed in stepwise increments, with changes considered valid only if sustained over a defined period. Hemodynamic variables are monitored concurrently but are not the primary determinants of opioid titration.

Abdominal wall analgesia is provided using either modified thoracoabdominal nerve block through perichondrial approach (M-TAPA) or external oblique intercostal (EOI) plane block, both applied as part of routine clinical practice. In line with the observational design, no allocation or intervention is performed by the investigators, and block selection is based on standard clinical decision-making.

Intraoperative data are recorded at fixed time intervals, including heart rate, mean arterial pressure, SCA-derived PPS values, and remifentanil infusion rates. The primary endpoint is the time-weighted average remifentanil infusion rate (µg/kg/min), reflecting overall intraoperative opioid requirement normalized to surgical duration. Secondary analyses include total opioid exposure, frequency and magnitude of deviations from target nociception ranges, and perioperative analgesic requirements.

Intravenous dexketoprofen is administered toward the end of surgery as part of routine clinical care. Postoperative outcomes include pain intensity assessed using a numeric rating scale (NRS), time to first analgesic request, and additional analgesic consumption. Postoperative nausea, vomiting, and perioperative adverse events are also recorded.

This study aims to characterize the relationship between nociception-guided opioid titration and regional anesthesia techniques, and to determine the relative contribution of abdominal wall blocks to intraoperative opioid sparing under objective monitoring conditions.

Type d'étude

Observationnel

Inscription (Estimé)

80

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Lieux d'étude

  • Turquie (Türkiye)
    • Yenimahalle
      • Ankara, Yenimahalle, Turquie (Türkiye)
        • Recrutement
        • Ankara Etlik City Hospital
        • Contact:

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Adulte
  • Adulte plus âgé

Accepte les volontaires sains

Non

Méthode d'échantillonnage

Échantillon non probabiliste

Population étudiée

Adult patients undergoing elective laparoscopic cholecystectomy under general anesthesia at a tertiary care hospital.

La description

Inclusion Criteria:

  • Patients aged 18-80 years
  • ASA physical status I-III
  • Scheduled for elective laparoscopic cholecystectomy under general anesthesia
  • Ability to provide written informed consent

Exclusion Criteria:

  • Patient refusal
  • Known allergy to local anesthetics
  • Chronic opioid use or opioid dependence
  • Neurological or psychiatric disorders affecting pain perception
  • Use of medications affecting autonomic nervous system activity, such as beta-blockers
  • Infection at the injection site
  • Coagulopathy or anticoagulant therapy
  • Pregnancy

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

Cohortes et interventions

Groupe / Cohorte
M-TAPA Group
Patients receiving ePatients receiving modified thoracoabdominal nerve block through perichondrial approach (M-TAPA) for intraoperative analgesia during laparoscopic cholecystectomy.ternal oblique intercostal plane block (EOI) for analgesia
EOI Group
Patients receiving external oblique intercostal plane (EOI) block for intraoperative analgesia during laparoscopic cholecystectomy.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Time-Weighted Mean Intraoperative Remifentanil Infusion Rate
Délai: Intraoperative period (from induction to end of surgery)
The time-weighted mean intraoperative remifentanil infusion rate will be calculated throughout the surgical period and expressed as micrograms per kilogram per minute (µg/kg/min) based on continuous infusion data.
Intraoperative period (from induction to end of surgery)

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Postoperative Pain Scores Assessed by Numeric Rating Scale
Délai: 0, 2, 4, 6, 12, and 24 hours postoperatively
Postoperative pain intensity will be assessed using the Numeric Rating Scale (NRS), ranging from 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain. Higher scores indicate worse pain. Assessments will be performed at rest and during movement.
0, 2, 4, 6, 12, and 24 hours postoperatively
Time to First Analgesic Requirement
Délai: Within 24 hours postoperatively
Time to First Analgesic Requirement
Within 24 hours postoperatively
Rescue Analgesic Consumption
Délai: First 24 hours postoperatively
Total amount of rescue analgesic (dexketoprofen) administered within the first 24 hours postoperatively.
First 24 hours postoperatively
Mean Arterial Pressure
Délai: Intraoperative period
Mean arterial pressure (MAP), expressed in mmHg, will be recorded intraoperatively and compared with baseline values.
Intraoperative period
Heart Rate
Délai: Intraoperative period
Heart rate, expressed as beats per minute, will be recorded intraoperatively and compared with baseline values.
Intraoperative period
Skin Conductance Algesimeter(SCA)
Délai: Intraoperative period
Skin Conductance Algesimeter (SCA) peaks per second (PPS) values recorded intraoperatively to assess nociceptive responses.
Intraoperative period
Postoperative Nausea and Vomiting (PONV)
Délai: First 24 hours postoperatively
Incidence of postoperative nausea and vomiting within the first 24 hours after surgery.
First 24 hours postoperatively

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Ankara Etlik City Hospital

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

15 mai 2026

Achèvement primaire (Estimé)

1 août 2026

Achèvement de l'étude (Estimé)

1 septembre 2026

Dates d'inscription aux études

Première soumission

5 mai 2026

Première soumission répondant aux critères de contrôle qualité

15 mai 2026

Première publication (Réel)

19 mai 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

9 juin 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

6 juin 2026

Dernière vérification

1 juin 2026

Plus d'information

Termes liés à cette étude

Mots clés

Autres numéros d'identification d'étude

  • AEŞH-EK-2026-019

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Description du régime IPD

Individual participant data will not be shared in accordance with institutional policies

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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