Cholinesterase Activity and DeliriUm During Critical Illness Study

NCT ID: NCT03098472

Last Updated: 2022-03-11

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 279 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2017-05-08
• Study Completion Date: 2021-02-01

Brief Summary

Delirium is a syndrome of acute brain dysfunction involving attention and cognition that affects up to half of older hospitalized patients and 50%-75% of critically ill ICU patients, such that millions of patients worldwide experience this acute threat to their health and well being every year. One-third to half of critical illness survivors struggle with a dementia-like disorder similar in severity to moderate-to-severe traumatic brain injury or Alzheimer's Disease, and the only proven risk factor that is potentially modifiable is delirium in the ICU. Despite the frequency and impact of delirium in the ICU, little is known regarding the biological mechanisms that lead to this form of organ dysfunction during critical illness. A widely held hypothesis proposes that inflammation is regulated by the cholinergic system, and that this interaction plays a pivotal role whether delirium developments in the setting of acute illness. Acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) are enzymes that hydrolyze the neurotransmitter acetylcholine. Changes in the activity of these enzymes, which can be measured in whole blood, reflect altered regulation of circulating acetylcholine. AChE and BuChE activities have promise as both predictors of delirium (when found to be low at admission) and biomarkers of delirium (when low during serial measurement). Neither of these biomarkers, however, have been studied in the ICU setting where delirium risk is the highest. The current investigation, therefore will be the first to determine the validity of circulating AChE and BuChE activities as biomarkers of delirium during critical illness and subsequent cognitive impairment after discharge. This study will measure whole blood AChE and butyrylcholinesterase BuChE activities within the framework of the ICU Delirium and Cognitive Impairment Study Group's ongoing clinical trials in critically ill patients.

Conditions

Delirium; Cognitive Impairment

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Eligibility Criteria

Exclusion Criteria

• Expected death within 24 hours of enrollment or lack of commitment to aggressive treatment by family or the medical team (e.g., likely withdrawal of life support measures within 24 hours of screening)
• Active substance abuse, psychotic disorder, or homelessness without a secondary contact person (which would make long-term follow-up difficult)
• Blindness or deafness (which would prevent assessment of the study's outcomes)
• Inability to obtain informed consent

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

DR. FRANZ KOHLER CHEMIE GMBH

UNKNOWN

Sponsor Role: collaborator

Vanderbilt University Medical Center

OTHER

Sponsor Role: lead

Responsible Party

Christopher G Hughes

Associate Professor of Anesthesiology

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Vanderbilt University Medical Center

Nashville, Tennessee, United States

Countries

United States

References

Hughes CG, Boncyk CS, Fedeles B, Pandharipande PP, Chen W, Patel MB, Brummel NE, Jackson JC, Raman R, Ely EW, Girard TD. Association between cholinesterase activity and critical illness brain dysfunction. Crit Care. 2022 Dec 6;26(1):377. doi: 10.1186/s13054-022-04260-1.

Reference Type: DERIVED

PMID: 36474266 (View on PubMed)

Other Identifiers

CADUCeuS

Identifier Type: -

Identifier Source: org_study_id