Delirium in Elderly Undergoing Cardiac Surgery and the Significance of CholinEsterase Activity (DECCEP)

April 10, 2018 updated by: Ana Stevanovic, RWTH Aachen University

Delirium in Elderly Undergoing Cardiac Surgery and the Significance of CholinEsterase Activity Measured by Point of Care Method - a Prospective Observational Study

The purpose of this study is to assess the association between the "point-of-care" (POC) measured ChE activity (Acetylcholinesterase (ChE) + Buturylcholinesterase (ChE)) and postoperative delirium in elderly patients undergoing cardiac surgery.

Furthermore the investigators aim to identify factors, which influence the baseline levels and the time course of ChE activity.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Cardiac surgery in elderly patients is associated with serious complications, like increased morbidity, mortality and postoperative delirium with further hazardous consequences. The incidence of postoperative delirium in elderly is reported with a range from 36.6% - 54.9%. The pathophysiology of delirium is complex and the interaction of the cholinergic system and inflammation reaction is a relevant precipitant factor. It was suggested that there is a strong association between the perioperative plasma ChE activity and the inflammatory response in patients developing delirium. Patients showed a significant reduction of the total ChE activity after orthopaedic surgery, with significant lower pre- and postoperative values of AChE and BuChE and increased inflammatory response in patients developing postoperative delirium. It remains unclear if these results are applicable to other patient populations and which factors have influenced the low preoperative ChE levels. In patients suffering from a cardiac disease, a reduced total ChE respectively BuChE activity was significantly associated with mortality and long-term major adverse cardiovascular events. The investigators hypothesize that the ChE activity in peripheral blood can be used as a potential biomarker, to early detect patients at high risk for postoperative delirium.

Study Type

Observational

Enrollment (Anticipated)

100

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
    • NRW
      • Aachen, NRW, Germany, 52074
        • Department of Anesthesiology, University Hospital Aachen

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

65 years and older (Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Tertiary care clinic

Description

Inclusion Criteria:

  • Written informed consent
  • ≥ 65 years of age
  • Scheduled to undergo elective cardiac surgery (coronary artery bypass graft (CABG), valve surgery, combined CABG-valve surgery) with the use of CPB
  • Both genders

Exclusion Criteria:

  • Planned deep hypothermic arrest
  • Acute / emergency procedures
  • Surgery without extracorporeal circulation (ECC)
  • Patients with a history of pseudocholinesterase deficiency
  • Employees of the respective study centres
  • Illiteracy
  • Severe communication difficulties and severe vision or hearing problems
  • Patients legally unable to give written informed consent
  • non-fluency in German language
  • Severe psychiatric or neuropsychiatric disorders
  • MMSE < 24 points, short geriatric depression scale (GDS) ≥ 10 points
  • Recent (<6 months) history of alcohol or drug abuse
  • The participation in a drug or device trial within the previous 30 days

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Patients undergoing cardiac surgery
Elderly patients scheduled to undergo elective cardiac surgery (coronary artery bypass graft (CABG), valve surgery, combined CABG-valve surgery) with the use of cardiopulmonary bypass.
Procedure: Elective cardiac surgery
Coronary artery bypass graft (CABG), valve surgery, combined CABG-valve surgery

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Acetylcholinesterase (AChE) and buturylcholinesterase (BuChE) activity
Time Frame: 5 days
The perioperative AChE and BuChE activity will be assessed in the whole blood by a "point-of-care" measuring instrument (ChE check mobile ®) and the association to the incidence and duration of postoperative delirium will be determined. It will be assessed preoperative and maximum until the 5th postoperative day (POD), minimum until the 3.POD.
5 days
Delirium
Time Frame: 5-45 days
Postoperative delirium will be assessed preoperative and daily with the CAM / CAM-ICU test until the 5.POD and on the discharge day from hospital. The incidence of postoperative delirium will be associated with the perioperative AChE and BuChE time course.
5-45 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Pre-existing patient related risk factors
Time Frame: 1 day
Influence of pre-existing patient related risk factors ( demographic data, medical and surgical history assessed preoperative) on postoperative delirium and the AChE and BuChE activity.
1 day
Identification of anticholinergic concomitant medication according to the PRISCUS list
Time Frame: 1 day
Number of participants with preoperative anticholinergic medication
1 day
Survey of treatment associated data
Time Frame: 45 days
Survey of treatment associated data until discharge (organ dysfunctions, postoperative pain, ICU length of stay, hospital length of stay, duration of mechanical ventilation, readmission rate to ICU, operation time, surgery, anaesthesia, intraoperative and postoperative volume load, postoperative mortality, comorbidities)
45 days
Cognitive function
Time Frame: 45 days
Assessment of the cognitive function preoperative and on 3.POD and at discharge,by mini mental state examination (MMSE)
45 days
Routine venous blood parameters
Time Frame: 5 days
Correlation of AChE and BuChE activity and routine venous blood parameters (Hb, Platelets, Leucocytes, INR, PTT, liver-enzymes (AST, ALT, y-GT, total Bilirubin), Creatinine, BUN, Albumin, sodium and potassium) and the influence on postoperative delirium
5 days
Inflammatory markers
Time Frame: 5 days
Correlation of AChE and BuChE activity to inflammatory markers in serum and the influence on postoperative delirium
5 days
Follow up measure of functional decline according to the IADL scale
Time Frame: 180 days
Patients will be followed up by phone on the 30. and 180.POD. Association of AChE and BuChE activity and the functional decline on the 30. and 180.POD. The preoperative IADL scale will be compared to the data on the 30. and 180.POD to assess the functional decline
180 days
Follow up measure of mortality
Time Frame: 180 days
Patients will be followed up by phone on the 30. and 180.POD. Determination of the association between the peri-operative AChE and BuChE activity and the mortality on the 30. and 180.POD
180 days
Follow up measure of the number of MACCE-events
Time Frame: 180 days
Patients will be followed up by phone on the 30. and 180.POD. Association of AChE and BuChE activity and the postoperative major adverse cardiovascular and cerebral events (MACCE) on the 30. and 180.POD. The number of events will be assessed.
180 days
Health related quality of life
Time Frame: 180 days
Health related quality of life measured by EuroQuol EQ-5D-5L test preoperative, on 30.POD and 180. POD
180 days
Instrumental activities of daily living
Time Frame: 180 days
The Lawton Instrumental Activities of Daily Living (IADL) Scale measured preoperative, on 30.POD and 180. POD
180 days

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Gender effect on delirium assessed by CAM-ICU/CAM
Time Frame: 5-45 days
Analysis of the association of postoperative delirium until 5.POD respective discharge day and the gender of the patient
5-45 days
Gender effects on the peri-operative AChE and BuChE activity
Time Frame: 5-45 days
Measurement of the AChE and BuChE activity until 3.-5.POD. Analysis of the association of the gender of the patient and the peri-operative time-course of the AChE and BuChE activity until the 3. respective 5.POD.
5-45 days
Postoperative bleeding
Time Frame: 1 day
Measured 12 hours after surgery
1 day

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

RWTH Aachen University

Investigators

  • Principal Investigator: Ana Stevanovic, MD, Department of Anesthesiology, University Hospital Aachen, Germany

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 1, 2015

Primary Completion (Actual)

May 1, 2016

Study Completion (Actual)

November 1, 2016

Study Registration Dates

First Submitted

December 9, 2015

First Submitted That Met QC Criteria

December 11, 2015

First Posted (Estimate)

December 16, 2015

Study Record Updates

Last Update Posted (Actual)

April 11, 2018

Last Update Submitted That Met QC Criteria

April 10, 2018

Last Verified

April 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 15-162

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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