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Wildes TS, Winter AC, Maybrier HR, Mickle AM, Lenze EJ, Stark S, Lin N, Inouye SK, Schmitt EM, McKinnon SL, Muench MR, Murphy MR, Upadhyayula RT, Fritz BA, Escallier KE, Apakama GP, Emmert DA, Graetz TJ, Stevens TW, Palanca BJ, Hueneke RL, Melby S, Torres B, Leung J, Jacobsohn E, Avidan MS. Protocol for the Electroencephalography Guidance of Anesthesia to Alleviate Geriatric Syndromes (ENGAGES) study: a pragmatic, randomised clinical trial. BMJ Open 2016; 6:e011505. [PMID: 27311914 PMCID: PMC4916634 DOI: 10.1136/bmjopen-2016-011505] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
INTRODUCTION Postoperative delirium, arbitrarily defined as occurring within 5 days of surgery, affects up to 50% of patients older than 60 after a major operation. This geriatric syndrome is associated with longer intensive care unit and hospital stay, readmission, persistent cognitive deterioration and mortality. No effective preventive methods have been identified, but preliminary evidence suggests that EEG monitoring during general anaesthesia, by facilitating reduced anaesthetic exposure and EEG suppression, might decrease incident postoperative delirium. This study hypothesises that EEG-guidance of anaesthetic administration prevents postoperative delirium and downstream sequelae, including falls and decreased quality of life. METHODS AND ANALYSIS This is a 1232 patient, block-randomised, double-blinded, comparative effectiveness trial. Patients older than 60, undergoing volatile agent-based general anaesthesia for major surgery, are eligible. Patients are randomised to 1 of 2 anaesthetic approaches. One group receives general anaesthesia with clinicians blinded to EEG monitoring. The other group receives EEG-guidance of anaesthetic agent administration. The outcomes of postoperative delirium (≤5 days), falls at 1 and 12 months and health-related quality of life at 1 and 12 months will be compared between groups. Postoperative delirium is assessed with the confusion assessment method, falls with ProFaNE consensus questions and quality of life with the Veteran's RAND 12-item Health Survey. The intention-to-treat principle will be followed for all analyses. Differences between groups will be presented with 95% CIs and will be considered statistically significant at a two-sided p<0.05. ETHICS AND DISSEMINATION Electroencephalography Guidance of Anesthesia to Alleviate Geriatric Syndromes (ENGAGES) is approved by the ethics board at Washington University. Recruitment began in January 2015. Dissemination plans include presentations at scientific conferences, scientific publications, internet-based educational materials and mass media. TRIAL REGISTRATION NUMBER NCT02241655; Pre-results.
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Affiliation(s)
- T S Wildes
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - A C Winter
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - H R Maybrier
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - A M Mickle
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - E J Lenze
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, USA
| | - S Stark
- Department of Occupational Therapy, Washington University Institute for Public Health, School of Medicine, St. Louis, Missouri, USA
- Department of Neurology, Washington University Institute for Public Health, School of Medicine, St. Louis, Missouri, USA
| | - N Lin
- Department of Mathematics, Biostatistics Division, Washington University in St. Louis, St. Louis, Missouri, USA
| | - S K Inouye
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
- Institute for Aging Research, Hebrew SeniorLife, Boston, Massachusetts, USA
| | - E M Schmitt
- Institute for Aging Research, Hebrew SeniorLife, Boston, Massachusetts, USA
| | - S L McKinnon
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - M R Muench
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - M R Murphy
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - R T Upadhyayula
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - B A Fritz
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - K E Escallier
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - G P Apakama
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - D A Emmert
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - T J Graetz
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - T W Stevens
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - B J Palanca
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - R L Hueneke
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - S Melby
- Department of Surgery, Cardiothoracic Division, Washington University School of Medicine, St. Louis, Missouri, USA
| | - B Torres
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - J Leung
- Department of Anesthesia & Perioperative Care, University of California San Francisco, San Francisco, California, USA
| | - E Jacobsohn
- Department of Anesthesia, University of Manitoba/Winnipeg Regional Health Authority Anesthesia Program, Winnipeg, Manitoba, Canada
| | - M S Avidan
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri, USA
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