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Comparison of Intensive and Conservative NOL®-Guided Analgesia Strategies During Opioid-free Anesthesia (OFANOL)

3. November 2026 aktualisiert von: Prof Urs Zingg

Comparison of Intensive and Conservative NOL®-Guided Analgesia Strategies During Opioid-free Anesthesia for Bariatric Surgery: A Prospective Randomized Controlled Trial

Participants will be randomized to one of two predefined NOL®-guided analgesia strategies during bariatric surgery performed under OFA. In both groups the NOL® index will be continuously monitored intraoperatively and dexmedetomidine will be administered according to the assigned study algorithm based on the NOL® index using lean body weight (LBW) for dosing.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

The study aims to evaluate whether different intraoperative target ranges of the NOL® index during bariatric surgery performed under OFA are associated with differences in postoperative analgesic consumption and postoperative pain control without significant differences in intraoperative hemodynamics. Based on the physiological mechanisms outlined above, we hypothesize that during OFA with alpha-2 agonists such as dexmedetomidine, intensified NOL® target ranges (potentially 0-10) may be appropriate compared to the established range of 10-25 for opioid based TIVA. If this hypothesis is confirmed, clinical implications would include the need to establish OFA-specific NOL® target ranges to avoid under-treatment of nociception when applying TIVA-derived thresholds to OFA patients. Conversely, using inappropriately high NOL® targets derived from opioid-based anesthesia might lead to inadequate pain control and to excessive administration of analgesics postoperatively.

Studientyp

Interventionell

Einschreibung (Geschätzt)

400

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studieren Sie die Kontaktsicherung

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • Signed informed consent
  • Age ≥ 18 years
  • bariatric surgery (sleeve/bypass/Re-Do)

Exclusion Criteria:

  • Patients with contraindications for dexmedetomidine or lidocaine
  • Lack of ability to follow the study procedure, e.g. due to severe language barriers, mental disorders, dementia - Patients requiring preoperative or postoperative treatment in the intensive care unit (ICU) (excluding Obstructive sleep apnea syndrome (OSAS))
  • Patients with conditions precluding the use of the NOL® sensor, such as neuromuscular deficits affecting hand function
  • BMI <25 kg/m2

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Grundlegende Wissenschaft
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Aktiver Komparator: Intensive NOL®-guided strategy

Induction: An initial dexmedetomidine bolus of 0.3ug/kg LBW will be administered, followed by a continuous infusion of 0.3 ug/kg LBW/h.

Induction: An initial dexmedetomidine bolus of 0.3ug/kg LBW will be administered, followed by a continuous infusion of 0.3 ug/kg LBW/h.

Experimental: Conservative NOL®-guided strategy

Induction: An initial dexmedetomidine bolus of 0.3ug/kg LBW will be administered, followed by a continuous infusion of 0.1 ug/kg LBW/h.

Induction: An initial dexmedetomidine bolus of 0.3ug/kg LBW will be administered, followed by a continuous infusion of 0.1 ug/kg LBW/h.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Postoperative pain intensity Measured by the numeric rating scale (NRS) in the Post-anesthesia care unit (PACU)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

To evaluate whether an intensive NOL®-guided analgesia strategy reduces postoperative pain intensity in the post-anesthesia care unit (PACU) compared to a conservative NOL®-guided analgesia strategy in patients undergoing bariatric surgery under OFA.

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
Postoperative pain intensity Measured by the Behavioral Pain Scale (BPS) in the Post-anesthesia care unit (PACU)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

To evaluate whether an intensive NOL®-guided analgesia strategy reduces postoperative pain intensity in the post-anesthesia care unit (PACU) compared to a conservative NOL®-guided analgesia strategy in patients undergoing bariatric surgery under OFA.

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Difference between postoperative pain intensity measurement using the Behavioral Pain Scale (BPS) (outcome 1) and numeric rating scale (NRS) (outcome 2) in the Post-anesthesia care unit (PACU)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Difference between the outcome 1 and outcome 2

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
Total opioid consumption in the Post-anesthesia care unit (PACU)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Morphin (mg), Oxynorm (mg), Oxycodon/Naloxon (mg)

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
- Total non-opioid analgesic consumption in the Post-anesthesia care unit (PACU)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Paracetamol (mg), Metamizol (mg), Ketamin (mg)

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
- Total non-opioid analgesic consumption in the Post-anesthesia care unit (PACU)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Lidocain-P (mg/kgLBW/h)

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
- Total non-opioid analgesic consumption in the Post-anesthesia care unit (PACU)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Ketamin-Perfusor (mg/h)

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
- Incidence of Postoperative nausea and vomiting (PONV)
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

The proportion of patients who experience at least one episode of postoperative nausea, retching, or vomiting, or who require the administration of any antiemetic rescue medication (such as Ondansetron, Metoclopramide, Domperidone, or Itinerol).

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
- Richmond Agitation-Sedation Scale (RASS) scores during Post-anesthesia care unit (PACU) stay
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
- Quality of Recovery-15 (QoR-15) score on postoperative day 1
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days
At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Andere Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Safety endpoints
Zeitfenster: At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

- measures of intraoperative hemodynamic stability, including the incidence of hypotension, bradycardia, hypertension, tachycardia, and vasoactive medication use - occurrence of AEs and SAEs during the study period

At the Date of Surgery + 1 day after at Post-anesthesia care unit (PACU): two assessments within 2 consequent days

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

1. November 2026

Primärer Abschluss (Geschätzt)

1. Oktober 2027

Studienabschluss (Geschätzt)

1. Oktober 2027

Studienanmeldedaten

Zuerst eingereicht

5. Oktober 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

3. November 2026

Zuerst gepostet (Tatsächlich)

4. November 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

4. November 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

3. November 2026

Zuletzt verifiziert

1. November 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • 2026-01332

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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