DuraEEG - Duration of EEG and Treatment Outcomes in Critical Care

NCT07441434 | Completed

• 1 other identifier: 2025-00337; am25Sutter5
• Study Type: observational
• Target: 800
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of this retrospective, observational, single-center study is to evaluate how electroencephalography (EEG) monitoring duration affects diagnosis and treatment in adult critical care patients.

Conditions

Neurologic Dysfunction

Keywords

Electroencephalography; Intensive Care Unit

Outcome Measures

Primary Outcomes (24)

• Patient demographics

  Demographic information (e.g. age, sex) is collected.

  2014 - 02/2025

• Acute prehospital management data

  Data from acute prehospital management, as documented in emergency medical services (EMS) treatment protocols, is collected. The collected data elements are aggregated to describe the overall EMS response.

  2014 - 02/2025

• Duration of intensive care unit stay

  The length of intensive care unit (ICU) stay is recorded.

  2014 - 02/2025

• Duration of hospital stay

  The length of the total hospital stay is recorded.

  2014 - 02/2025

• Discharge destination

  The destination at discharge is recorded.

  2014 - 02/2025

• Neurological deficits

  The date(s) of onset and clinical course of neurological deficits, aggregated with additional clinical features are collected to capture the overall clinical presentation.

  2014 - 02/2025

• Number of Nonconvulsive Status Epilepticus in ectroencephalogram

  Electroencephalograms (EEGs) are collected to assess neurological activity and monitor for abnormalities that may affect treatment.

  2014 - 02/2025

• Medical history

  Patients' medical history, especially neurological and infectious disease history, is collected to provide a comprehensive overview of relevant clinical background.

  2014 - 02/2025

• Disease etiology

  The underlying causes of relevant diseases, particularly neurological and infectious conditions, are collected provide a comprehensive overview of relevant clinical background.

  2014 - 02/2025

• Previous episodes of altered neurologic function

  Information on previous episodes of altered neurological function, including their number and duration, is collected to provide a comprehensive measure of past disease burden.

  2014 - 02/2025

• Imaging features

  Neuroimaging features and other imaging features obtained during diagnostic work-up are aggregated to provide a comprehensive assessment of structural and functional abnormalities.

  2014 - 02/2025

• Comprehensive assessment of the neurological status based on Richmond Agitation-Sedation Scale (RASS)

  Neurological status during ICU stay is assessed using available data in the patient register from validated neurological assessments. These may include the Richmond Agitation-Sedation Scale (RASS), Sedation-Agitation Scale (SAS), Glasgow Coma Scale (GCS), or Intensive Care Delirium Screening Checklist (ICDSC). If multiple scores are available, they will be aggregated to provide a comprehensive assessment of neurological status. This outcome will be reported as a descriptive summary, synthesizing findings across tools, rather than as a single quantitative score. Richmond Agitation-Sedation Scale (RASS) is a 10-point validated tool (ranging from +4 to -5) used in intensive care to quickly assess a patient's level of sedation or agitation. A RASS score of 0 indicates an alert and calm patient, while positive scores represent agitation and negative scores indicate sedation.

  2014 - 02/2025

• Comprehensive assessment of critical illness severity based on standardized scoring including the Acute Physiology and Chronic Health Evaluation II (APACHE II)systems

  Disease severity during ICU stay is assessed using standardized scoring systems, including the Acute Physiology and Chronic Health Evaluation II (APACHE II), Simplified Acute Physiology Score II (SAPS II), and Sequential Organ Failure Assessment (SOFA), depending on data availability in the patient register. The specific scoring system applied, as well as the scale and interpretation of the score, varies based on routine clinical practice and available documentation. Where multiple severity scores are available, they will be synthesized to provide a descriptive summary of overall illness severity rather than a single quantitative score. APACHE II uses 12 routine physiologic measurements, age, and chronic health status-collected within 24 hours of ICU admission-to calculate a score (0 to 71) predicting mortality risk. Higher scores correspond to higher disease severity.

  2014 - 02/2025

• Charlson Comorbidity Index

  The Charlson Comorbidity Index (CCI) is calculated based on pre-existing comorbidities and additional diagnoses. The CCI predicts the ten-year mortality for a patient who may have a range of comorbid conditions. It assigns weighted scores (from 0 to maximal 6) to 17 comorbid conditions (e.g., heart disease, diabetes, cancer), resulting in a total score ranging from 0 to 33, if the patient had the most severe form of each of the 17 conditions.

  2014 - 02/2025

• Laboratory parameters

  Routine laboratory value are collected. The specific parameters recorded may vary depending on the laboratory assessments documented in the patient register. All values will be reported using their respective units of measurement. These parameters are aggregated to support an overall clinical interpretation rather than a single numerical value. This approach reflects standard clinical practice, where multiple lab values are considered together to assess a patient's condition.

  2014 - 02/2025

• Complications

  Complications occurring during intensive care treatment or clinical monitoring are collected, including but not limited to community-acquired and nosocomial infections, shock, hemorrhage, ischemic events, arrhythmia, cardiopulmonary arrest, and organ failure. These events are aggregated to provide a comprehensive overview of serious adverse clinical outcomes during critical care rather than reported as isolated parameters.

  2014 - 02/2025

• Glasgow Outcome Score

  The Glasgow Outcome Score (GOS) is calculated based on the assessment of key clinical outcomes such as inhospital mortality, survival, survival with neurofunctional alteration, return to premorbid neurological function, and hospital readmission to determine the patient outcome. The GOS ranges from 1 (death) to 5 (good recovery).

  2014 - 02/2025

• Therapeutic intervention

  Therapeutic interventions are documented, including duration, dosage, and number of medications, the number of drugs, administration of fluids (including blood products, crystalloids, enteral and parenteral nutrition, etc.), invasive procedures (such as intubation, mechanical ventilation, vasopressor use, and placement of central lines), and changes to any of these treatments, including the date of treatment adaptation.

  2014 - 02/2025

• Vital signs

  Vital signs are analyzed based on the data available in the patient register. The specific parameters recorded depend on the clinical documentation available.These values are aggregated to support an overall clinical assessment rather than a single numerical score. This reflects standard practice, where multiple vital signs are interpreted together to evaluate a patient's condition.

  2014 - 02/2025

• Comprehensive assessment of the neurological status based on Sedation-Agitation Scale (SAS)

  Neurological status during ICU stay is assessed using available data in the patient register from validated neurological assessments. These may include the Richmond Agitation-Sedation Scale (RASS), Sedation-Agitation Scale (SAS), Glasgow Coma Scale (GCS), or Intensive Care Delirium Screening Checklist (ICDSC). The specific tool used, as well as the scale of the score and meaning behind the score, depends on routine clinical practice and available documentation in the register. If multiple scores are available for a patient, they will be aggregated to provide a comprehensive assessment of neurological status. This outcome will be reported as a descriptive summary, synthesizing findings across tools, rather than as a single quantitative score. The sedation-Agitation Scale is a tool to assess both levels of sedation and agitation. In this tool scores 1-2 are for unawake patients and doesn't request use of sedative, while 3-7 are awake patients of which 5-7 are in need of Sedative use.

  2014 - 02/2025

• Comprehensive assessment of the neurological status based on Glasgow Coma Scale (GCS)

  Neurological status during ICU stay is assessed using available data in the patient register from validated neurological assessments. These may include the Richmond Agitation-Sedation Scale (RASS), Sedation-Agitation Scale (SAS), Glasgow Coma Scale (GCS), or Intensive Care Delirium Screening Checklist (ICDSC). The specific tool used, as well as the scale of the score and meaning behind the score, depends on routine clinical practice and available documentation in the register. The Glasgow Coma Scale (GCS) is a standardized neurological tool used to objectively measure and track a person's level of consciousness, particularly following traumatic brain injury. It assesses three components:eye opening (1-4), verbal response (1-5), motor response (1-6), where higher scores indicate better function.

  2014 - 02/2025

• Comprehensive assessment of the neurological status based on Comprehensive assessment of the neurological status based on Intensive Care Delirium Screening Checklist (ICDSC)

  Neurological status during ICU stay is assessed using available data in the patient register from validated neurological assessments. These may include the Richmond Agitation-Sedation Scale (RASS), Sedation-Agitation Scale (SAS), Glasgow Coma Scale (GCS), or Intensive Care Delirium Screening Checklist (ICDSC). The specific tool used, as well as the scale of the score and meaning behind the score, depends on routine clinical practice and available documentation in the register. The Intensive Care Delirium Screening Checklist (ICDSC) is an 8-item, validated tool used by ICU bedside nurses to rapidly screen for delirium in critically ill patients, including those who are intubated. It assesses behavioral, cognitive, and physiological symptoms over a 12-to-24-hour period, with a total score of indicating the presence of delirium.

  2014 - 02/2025

• Comprehensive assessment of critical illness severity based on standardized scoring systems, including the Simplified Acute Physiology Score II (SAPS II)

  Disease severity during ICU stay is assessed using standardized scoring systems, including the Acute Physiology and Chronic Health Evaluation II (APACHE II), Simplified Acute Physiology Score II (SAPS II), and Sequential Organ Failure Assessment (SOFA), depending on data availability in the patient register. The specific scoring system applied, as well as the scale and interpretation of the score, varies based on routine clinical practice and available documentation. Where multiple severity scores are available, they will be synthesized to provide a descriptive summary of overall illness severity rather than a single quantitative score. The Simplified Acute Physiology Score II (SAPS II) is a severity-of-illness scoring system that estimates the risk of in-hospital mortality for adult ICU patients. Assessed within the first 24 hours of admission, it assigns 0-163 points based on age, admission type, chronic diseases, and 12 physiological variables

  2014 - 02/2025

• Comprehensive assessment of critical illness severity based on standardized scoring systems, including the Sequential Organ Failure Assessment (SOFA)

  Disease severity during ICU stay is assessed using standardized scoring systems, including the Acute Physiology and Chronic Health Evaluation II (APACHE II), Simplified Acute Physiology Score II (SAPS II), and Sequential Organ Failure Assessment (SOFA), depending on data availability in the patient register. The specific scoring system applied, as well as the scale and interpretation of the score, varies based on routine clinical practice and available documentation. Where multiple severity scores are available, they will be synthesized to provide a descriptive summary of overall illness severity rather than a single quantitative score. The Sequential Organ Failure Assessment (SOFA) evaluates six organ systems (respiratory, cardiovascular, hepatic, coagulation, renal, and neurological), with scores ranging from 0 to 4 per system.

  2014 - 02/2025

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

The study population will include all consecutive adult patients (i.e., ≥18 years of age) who were treated at the University Hospital Basel and/or were selected for a close monitoring on a monitoring Unit for EEG or continuous EEG between 2014 and until the end of 02/2025.

You may qualify if:

• Adult patients (i.e., patients ≥18 years of age)
• Received an EEG/continuous EEG
• Treated at the University Hospital of Basel on a suitable monitoring unit from 01.01.2014 - 28.02.2025.

You may not qualify if:

• Patients younger than 18 years
• Patients who did not receive suitable EEG monitoring
• Patients with documented refusal of the general consent

Sponsors & Collaborators

• University Hospital, Basel, Switzerland: lead

Study Sites (1)

University Hospital Basel, Clinic for Intensive Care Medicine

Basel, Canton of Basel-City, 4031, Switzerland

Location

MeSH Terms

Conditions

Neurologic Manifestations

Condition Hierarchy (Ancestors)

Nervous System Diseases; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Officials

• Raoul Sutter, Prof. Dr. med.

  University Hospital Basel, Clinic for Intensive Care Medicine

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 10, 2026
• First Posted: March 2, 2026
• Study Start: January 1, 2014
• Primary Completion: February 28, 2025
• Study Completion: February 28, 2025
• Last Updated: March 2, 2026

Record last verified: 2026-02

Locations

CH (1)