Individualized Supramaximal Stimulation Current During Continuous Neuromonitoring in Thyroid Surgery (CIONM-SSC)
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.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
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.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Kontakter og lokationer
Studiesteder
-
-
-
Gdansk, Polen, 80-135
- The University Clinical Centre in Gdansk
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
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.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Antal grupper/kohorter
Kohorter og interventioner
Gruppe / kohorteGruppe / kohorte |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
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.
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Patient-specific supramaximal stimulation current
Tidsramme: 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)
Tidsramme: 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)
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Electromyographic response amplitude
Tidsramme: During surgery
|
Comparison of electromyographic response amplitudes between individualized and fixed stimulation current protocols during continuous intraoperative neuromonitoring.
|
During surgery
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- KB/202/2025
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
IPD-planbeskrivelse
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .