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Individualized Supramaximal Stimulation Current During Continuous Neuromonitoring in Thyroid Surgery (CIONM-SSC)

13. Juli 2026 aktualisiert von: Medical University of Gdansk

Patient-Specific Determination of Supramaximal Stimulation Current During Continuous Intraoperative Neuromonitoring of the Recurrent Laryngeal Nerve in Thyroid Surgery

Continuous intraoperative neuromonitoring (C-IONM) is increasingly used during thyroid surgery to detect early changes in recurrent laryngeal nerve function and reduce the risk of nerve injury. Current clinical practice recommends the use of fixed supramaximal stimulation currents; however, these recommendations are based on limited experimental evidence and may not account for individual variability between patients.

This retrospective observational cohort study aims to determine patient-specific supramaximal stimulation currents (SSC) during C-IONM and to evaluate whether individualized stimulation provides monitoring quality comparable to conventional fixed-current stimulation while potentially reducing unnecessary stimulation intensity. The study also investigates factors influencing electromyographic response amplitudes during surgery and assesses the safety of individualized stimulation parameters.

Studienübersicht

Status

Abgeschlossen

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Continuous intraoperative neuromonitoring (C-IONM) of the vagus nerve is increasingly used during thyroid surgery to facilitate early recognition of progressive recurrent laryngeal nerve (RLN) injury. Current international recommendations advocate the use of a fixed supramaximal stimulation current, typically between 1 and 2 mA. However, these recommendations are based on limited experimental and clinical evidence and do not account for potential interindividual differences in nerve excitability.

The aim of this retrospective observational cohort study was to characterize the distribution of patient-specific supramaximal stimulation current (SSC) during C-IONM and to determine whether individualized SSC selection maintains monitoring performance compared with conventional fixed-current stimulation. Secondary objectives included evaluation of factors affecting electromyographic response amplitude and assessment of the safety of individualized stimulation.

The study included consecutive adult patients undergoing thyroid surgery with C-IONM at a tertiary endocrine surgery center. Patients operated before implementation of an updated stimulation protocol constituted the control cohort and underwent monitoring using a fixed stimulation current of 1.5 mA. After protocol implementation, SSC was individually determined for each vagus nerve at the beginning of the procedure by gradually increasing stimulation current until no further increase in electromyographic response amplitude was observed. Continuous monitoring was subsequently performed using the individualized SSC.

Neuromonitoring recordings were exported from the monitoring system, anonymized, and analyzed using dedicated Python software developed for this study. The software identified individual stimulation events, excluded incomplete or technically inadequate recordings, and extracted stimulation current and electromyographic amplitude for quantitative analysis. More than one million individual stimulation responses were evaluated.

The primary objective was to determine the distribution of individualized SSC values and compare monitoring performance between individualized and fixed-current stimulation. Secondary analyses evaluated changes in response amplitude during surgery, variability between right and left vagus nerves, factors influencing amplitude, and the occurrence of monitoring-related adverse events.

Statistical analyses included descriptive statistics, non-parametric comparisons, regression analysis, and multivariable modeling to identify independent predictors of electromyographic response amplitude.

Studientyp

Beobachtungs

Einschreibung (Tatsächlich)

623

Kontakte und Standorte

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

Studienorte

      • Gdansk, Polen, 80-135
        • The University Clinical Centre in Gdansk

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

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Nein

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

The study population consisted of consecutive adult patients who underwent thyroid surgery with continuous intraoperative neuromonitoring (C-IONM) at the Department of Endocrine and General Surgery, Medical University of Gdańsk, Poland, between June 2020 and July 2024. Patients were identified retrospectively from the institutional thyroid surgery database and neuromonitoring records. Clinical and operative data were collected as part of routine clinical care. Participants were included consecutively during the study period.

Beschreibung

Inclusion Criteria:

  • Adults aged 18 years or older.
  • Patients undergoing thyroid surgery with continuous intraoperative neuromonitoring (C-IONM) of the vagus nerve.
  • Availability of complete intraoperative neuromonitoring recordings suitable for analysis.
  • Availability of complete clinical and operative data.

Exclusion Criteria:

  • Age younger than 18 years.
  • Incomplete or technically inadequate neuromonitoring recordings.
  • Loss of signal or recurrent laryngeal nerve palsy preventing reliable amplitude analysis.
  • Missing or incomplete clinical data required for the study.

Studienplan

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

Wie ist die Studie aufgebaut?

Designdetails

Kohorten und Interventionen

Gruppe / Kohorte
Intervention / Behandlung
Control cohort
Patients who underwent thyroid surgery with continuous intraoperative neuromonitoring (C-IONM) using a fixed vagus nerve stimulation current of 1.5 mA throughout the procedure. These patients were operated before implementation of the individualized stimulation protocol.
Continuous vagus nerve stimulation during thyroid surgery using a fixed supramaximal stimulation current of 1.5 mA.
Individualized SSC cohort
Patients who underwent thyroid surgery with continuous intraoperative neuromonitoring (C-IONM) using an individually determined supramaximal stimulation current (SSC). SSC was established at the beginning of the procedure for each vagus nerve and subsequently used throughout continuous monitoring.
Continuous vagus nerve stimulation during thyroid surgery using an individually determined supramaximal stimulation current established at the beginning of the procedure.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Patient-specific supramaximal stimulation current
Zeitfenster: During surgery
Distribution of the individualized supramaximal stimulation current required to achieve maximal electromyographic response during continuous intraoperative neuromonitoring of the vagus nerve.
During surgery
Patient-specific supramaximal stimulation current (SSC)
Zeitfenster: During surgery (at the beginning of continuous intraoperative neuromonitoring)
Distribution of the individualized supramaximal stimulation current (SSC) required to achieve maximal electromyographic response during continuous intraoperative neuromonitoring of the vagus nerve.
During surgery (at the beginning of continuous intraoperative neuromonitoring)

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Electromyographic response amplitude
Zeitfenster: During surgery
Comparison of electromyographic response amplitudes between individualized and fixed stimulation current protocols during continuous intraoperative neuromonitoring.
During surgery

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 (Tatsächlich)

18. Juni 2020

Primärer Abschluss (Tatsächlich)

25. Juli 2024

Studienabschluss (Tatsächlich)

11. Februar 2025

Studienanmeldedaten

Zuerst eingereicht

13. Juli 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

13. Juli 2026

Zuerst gepostet (Tatsächlich)

17. Juli 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

17. Juli 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

13. Juli 2026

Zuletzt verifiziert

1. Juli 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • KB/202/2025

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

JA

Beschreibung des IPD-Plans

De-identified individual participant data underlying the reported results will be available upon reasonable request to the corresponding author, subject to approval from the hospital administration and applicable ethical and institutional regulations.

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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