Prediction Model of Long-term Cognitive Dysfunction and Delirium After Cardiac Surgery

A Prediction Model of Long-term Postoperative Cognitive Dysfunction and Delirium After Cardiac Surgery Based on Peripheral Blood Biomarkers： A Prospective Cohort Study(PPSB)

Delirium is a clinical syndrome caused by normal dysfunction of the brain, characterized by reduced awareness and responsiveness to the environment, as well as orientation disorders, incoherent thinking and memory disorders. Delirium indicates poor recovery of cognitive function, decreased ability of daily life, may need to enter nursing homes, and even lead to adverse outcomes such as death. According to a number of clinical studies, middle-aged and elderly people are prone to delirium after undergoing major surgery. Delirium occurs in 31 % -40 % of patients over 50 years old after cardiac surgery. Compared with patients without postoperative delirium, patients with postoperative delirium had significant cognitive impairment within 1 year after cardiac surgery. The occurrence of delirium suggests that the patient 's brain has become fragile, cognitive function has begun to decline, and the risk of future dementia has increased.

Secondly, delirium and dementia have overlapping clinical features and common pathogenic mechanisms. Some scholars even speculate that delirium and dementia represent different stages of a common process. It is generally believed that the peripheral immune system may be involved in the pathogenesis and progression of dementia through the dysfunctional blood-brain barrier. The activation of microglia and astrocytes leads to the release of chemokines, which can recruit peripheral immune cells to the central nervous system. At the same time, cytokines released by peripheral cells can cross the blood-brain barrier and act on glial cells to change their phenotype.

This study is a prospective cohort study of patients aged 65 and over who are about to undergo elective cardiac surgery.CyTOF can achieve accurate immunophenotyping of cell populations while comprehensively and accurately detecting and analyzing cytokines and signaling pathways. Therefore, the detection of peripheral blood biomarkers may effectively predict the risk of long-term cognitive dysfunction and postoperative delirium in patients undergoing cardiac surgery.

Study Overview

• Status: Recruiting
• Conditions: Delirium; Cognitive Dysfunction
• Intervention / Treatment: Procedure: cardiac surgery

• Study Type: Observational
• Enrollment (Estimated): 200

Contacts and Locations

• Study Contact: Name: Li Peiying, Ph.D.; Phone Number: +8615800616866; Email: peiyingli.md@gmail.com

Study Locations

• China
  • Shanghai
    • Shanghai, Shanghai, China, 200127
      • Recruiting
      • Renji Hospital, Shanghai Jiao Tong University, School of Medicine
      • Contact: XIA JIN, PD; Phone Number: +8618094575236; Email: jinxia026779@renji.com
      • Principal Investigator: DAN HUANG, MS
      • Contact: DAN HUANG, MS; Phone Number: +8615921108822; Email: huangdan@renji.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Older Adult
• Accepts Healthy Volunteers: N/A

• Sampling Method: Non-Probability Sample

Study Population

During the implementation of the project, all patients with cardiac surgery who met the inclusion criteria were included in the Department of Cardiac Surgery of Renji Hospital. The total sample size was the sum of all patients by the project deadline.

Description

Inclusion Criteria:

• Age ≥ 65 years
• Patients undergoing elective cardiac surgery with cardiopulmonary bypass
• Sign informed consent

Exclusion Criteria:

• serious dementia, encephalopathy, mental illness or other neurological diseases
• Patients who could not take neurocognitive tests due to other reasons ( such as language, hearing or visual impairment )
• Patients with stage 3 or 4 malignant tumors, and patients with pancreatic cancer, gallbladder cancer, cholangiocarcinoma and other tumors with high malignancy and expected survival time less than 1 year
• American Society of Anesthesiologists ( ASA ) classification IV or V patients

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
postoperative delirium	To establish a risk factor prediction model for postoperative delirium in patients aged 65 and over undergoing elective cardiac surgery by detecting peripheral blood biomarkers by CyTOF.	up to 5 days after surgery

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
long-term cognitive dysfunction	To establish a risk factor prediction model for long-term cognitive impairment in patients aged 65 and over undergoing elective cardiac surgery by detecting peripheral blood biomarkers by CyTOF.	1 year after surgery

Collaborators and Investigators

• Sponsor: RenJi Hospital

Study record dates

Study Major Dates

• Study Start (Actual): August 1, 2023
• Primary Completion (Estimated): July 29, 2024
• Study Completion (Estimated): July 30, 2025

Study Registration Dates

• First Submitted: April 6, 2023
• First Submitted That Met QC Criteria: July 24, 2023
• First Posted (Actual): August 2, 2023

Study Record Updates

• Last Update Posted (Actual): September 8, 2023
• Last Update Submitted That Met QC Criteria: September 6, 2023
• Last Verified: September 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Mental Disorders; Nervous System Diseases; Neurologic Manifestations; Confusion; Neurobehavioral Manifestations; Neurocognitive Disorders; Cognition Disorders; Delirium; Cognitive Dysfunction
• Other Study ID Numbers: PPSB

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No