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Prospective Observational Multimodal Neuromonitoring During High-Risk Adult Surgery

4 mai 2026 mis à jour par: Noah Jouett, University of Texas Southwestern Medical Center

Prospective Observational Multimodal Neuromonitoring During High-Risk Adult Surgery: A Single-Center Cohort Study of Quantitative EEG, Noninvasive Intracranial Dynamics, and Perioperative Physiologic Correlates

This is a prospective observational cohort study of adult patients undergoing high-risk surgery at UT Southwestern Medical Center. The study acquires synchronized multimodal neuromonitoring data - including SedLine quantitative EEG (qEEG) extracted from standard-of-care clinical monitoring and, where deployed, Brain4Care (B4C) noninvasive intracranial dynamics data - and links these data to perioperative hemodynamic, medication, laboratory, procedural, and outcome variables. No alteration of routine clinical care occurs. The primary goal is to characterize associations between monitor-derived features and perioperative clinical variables, and to establish a multimodal dataset supporting future analyses of perioperative brain health in high-risk surgical populations.

Aperçu de l'étude

Statut

Pas encore de recrutement

Les conditions

Description détaillée

BACKGROUND: Patients undergoing major spine surgery, liver transplantation, on-pump cardiac surgery, major vascular surgery, major thoracic surgery, major abdominal surgery, and neurosurgical craniotomy are exposed to substantial perioperative physiologic stress, including hemodynamic instability, blood loss, cardiopulmonary bypass, and procedure-specific periods of altered cerebral perfusion. Quantitative electroencephalography and noninvasive assessments of intracranial dynamics may provide complementary information about brain state and cerebrovascular physiology during these high-risk operations. However, the relationships between monitor-derived features and intraoperative events - including hypotension, anesthetic transitions, major surgical events, and postoperative outcomes - remain incompletely characterized.

DESIGN: Single-center prospective observational cohort study at UT Southwestern Medical Center. SedLine quantitative EEG data are extracted from standard-of-care clinical monitoring for all enrolled subjects. Brain4Care (B4C) noninvasive intracranial dynamics monitoring may additionally be placed as a research device depending on study workflow, patient characteristics, technical feasibility, and clinical context. Either monitoring configuration - SedLine alone or SedLine combined with B4C - constitutes a complete and valid study encounter.

The Moberg Clinical Platform (Moberg Analytics; FDA-cleared multimodal data integration system) serves as the primary data acquisition hub where deployed in the operating room, aggregating synchronized high-resolution physiologic waveforms alongside SedLine and B4C outputs. Where Moberg is unavailable, hemodynamic and physiologic variables are collected retrospectively from the Epic intraoperative anesthesia record.

MONITORING MODALITIES:

Research device placed specifically for this study (where deployed):

- Brain4Care (B4C) extensometry: skull-mounted noninvasive sensor recording cranial compliance-related waveform morphology (P2/P1 ratio, Time to Peak).

Standard-of-care clinical data recorded for research purposes:

  • SedLine (Masimo): 4-channel frontal quantitative EEG providing Patient State Index, Spectral Edge Frequency, and exportable raw EDF-format waveforms.
  • Moberg Clinical Platform: multimodal physiologic waveform integration including arterial blood pressure, SpO2, ECG, ventilator-derived parameters, temperature, and EtCO2.

DATA MANAGEMENT: Subjects are assigned unique study identifiers. Direct identifiers are removed from analytic datasets. Research data are stored on secure, institutionally approved systems accessible only to IRB-authorized study personnel. De-identified data may be shared with qualified external collaborators under executed data use agreements.

Type d'étude

Observationnel

Inscription (Estimé)

300

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

  • États-Unis
    • Texas
      • Dallas, Texas, États-Unis, 75390
        • UT Southwestern Medical Center - Clements University Hospital
        • Chercheur principal:
          • Noah Jouett, DO, PhD
        • Contact:
        • Sous-enquêteur:
          • Ulrike Hoffmann, MD, PhD
        • Sous-enquêteur:
          • Peiman Lahsaei, MD

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 age 18 years or older scheduled to undergo major spine surgery, liver transplantation, on-pump cardiac surgery, major vascular surgery, major thoracic surgery, major abdominal surgery, or neurosurgical craniotomy at UT Southwestern Medical Center. These populations were selected because they commonly experience substantial perioperative hemodynamic and physiologic perturbations.

La description

Inclusion Criteria:

  • Age 18 years or older
  • Scheduled to undergo major spine surgery, liver transplantation, on-pump cardiac surgery, major vascular surgery, major thoracic surgery, major abdominal surgery, or neurosurgical craniotomy at UT Southwestern Medical Center
  • Able to provide informed consent (self or legally authorized representative when applicable)
  • Safe and feasible placement of SedLine and/or Brain4Care monitoring as determined by the clinical and research teams
  • Anticipated availability of perioperative clinical data needed for study analyses

Exclusion Criteria:

  • Age younger than 18 years
  • Prisoner status
  • Pregnancy
  • Unable to provide informed consent in English (consent documents available in English only)
  • Declining participation
  • Lack of subject or legally authorized representative consent when required
  • Clinical condition preventing safe or feasible placement of study monitors (e.g., incompatible surgical field location, significant facial or scalp injury, open wounds at intended sensor placement site)
  • Operative workflow or clinical urgency precluding reasonable completion of consent and monitor placement prior to start of surgery
  • Anticipated clinical data capture insufficient for meaningful analysis

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
High-Risk Surgical Patients
Adult patients age 18 years or older undergoing major spine surgery, liver transplantation, on-pump cardiac surgery, major vascular surgery, major thoracic surgery, major abdominal surgery, or neurosurgical craniotomy at UT Southwestern Medical Center. All participants undergo SedLine qEEG data capture from existing standard-of-care clinical monitoring. A subset additionally undergo B4C noninvasive intracranial dynamics monitoring as a research device.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Proportion of enrolled cases with analyzable SedLine quantitative EEG (Patient State Index) recording during surgery
Délai: Intraoperative period (duration of surgery, typically 2-12 hours)
Percentage of total enrolled cases yielding analyzable SedLine Patient State Index (PSI) epochs during the intraoperative period. Signal quality assessed by artifact burden and data completeness. Reported as a single proportion (percentage of cases with analyzable PSI data) across surgical case types.
Intraoperative period (duration of surgery, typically 2-12 hours)
Proportion of enrolled cases with analyzable Brain4Care extensometry (P2/P1 ratio) recording during surgery
Délai: Intraoperative period (duration of surgery, typically 2-12 hours)
Percentage of total enrolled cases yielding analyzable Brain4Care (B4C) extensometry P2/P1 ratio epochs during the intraoperative period. Signal quality assessed by artifact burden and adequate waveform morphology. Reported as a single proportion (percentage of cases with analyzable B4C data) across surgical case types.
Intraoperative period (duration of surgery, typically 2-12 hours)
Correlation between SedLine Patient State Index and intraoperative mean arterial pressure
Délai: Intraoperative period through 90 days post-surgery
Spearman correlation coefficient between SedLine-derived Patient State Index (PSI) values and concurrently recorded intraoperative mean arterial pressure. Secondary within-case correlation analyses with vasoactive drug administration epochs, anesthetic transitions, blood loss events, and major surgical epochs will also be reported as correlation coefficients.
Intraoperative period through 90 days post-surgery
Correlation between Brain4Care extensometry P2/P1 ratio and intraoperative mean arterial pressure
Délai: Intraoperative period through 90 days post-surgery
Spearman correlation coefficient between Brain4Care (B4C) extensometry-derived P2/P1 ratio values and concurrently recorded intraoperative mean arterial pressure. Secondary within-case correlation analyses with vasoactive drug administration epochs, anesthetic transitions, blood loss events, and major surgical epochs will also be reported as correlation coefficients.
Intraoperative period through 90 days post-surgery

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Incidence of postoperative delirium assessed by Confusion Assessment Method (CAM)
Délai: In-hospital postoperative period (expected 2-14 days post-surgery)
Rate of postoperative delirium as documented by Confusion Assessment Method (CAM) assessments in nursing records during the postoperative hospital stay, reported as incidence (percentage of enrolled patients with at least one positive CAM screen). Secondary analyses will examine associations between intraoperative SedLine PSI or B4C P2/P1 ratio features and postoperative delirium occurrence.
In-hospital postoperative period (expected 2-14 days post-surgery)
Proportion of cases with computable cerebrovascular reactivity indices from Brain4Care extensometry and arterial blood pressure data
Délai: Intraoperative period
Percentage of enrolled cases in which cerebrovascular reactivity-related indices can be computed from acquired Brain4Care (B4C) extensometry waveforms and concurrent arterial blood pressure data, reported as a single proportion with characterization of index distributions across surgical populations.
Intraoperative period
Functional status at 90 days post-surgery assessed by modified Rankin Scale via medical record review
Délai: 90 days post-surgery
Functional and neurological status assessed by modified Rankin Scale (mRS) score via medical record review and/or structured contact at up to 90 days from date of surgery. Reported as ordinal mRS score (0-6).
90 days post-surgery

Collaborateurs et enquêteurs

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

Parrainer

University of Texas Southwestern Medical Center

Les enquêteurs

  • Chercheur principal: Noah Jouett, DO, PhD, University of Texas Southwestern Medical Center

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 (Estimé)

1 juillet 2026

Achèvement primaire (Estimé)

1 juin 2028

Achèvement de l'étude (Estimé)

1 décembre 2028

Dates d'inscription aux études

Première soumission

18 avril 2026

Première soumission répondant aux critères de contrôle qualité

4 mai 2026

Première publication (Réel)

11 mai 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

11 mai 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

4 mai 2026

Dernière vérification

1 avril 2026

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • STU20260828

Plan pour les données individuelles des participants (IPD)

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

NON

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

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