Frequency of Platelets Transfusion & Post-Operative Bleeding Risk in Patients on Clopidogrel Undergoing CABG

May 18, 2026 updated by: Khalid Siddiqui, Aga Khan University

Frequency of Platelets Transfusion and Post-Operative Bleeding Risk in Patients on Clopidogrel Undergoing Coronary Artery Bypass Grafting (CABG): A Retrospective Cohort

The goal of this retrospective cohort study Is to Primarily be platelet transfusion frequency and postoperative bleeding risk, analysis using descriptive and inferential statistics in all eligible patients admitted to the cardiac intensive care unit (CICU) for open-heart surgery were included of both gender, age group of 30-80 years. The main questions it aims to answer are:

  • How was the frequency of platelet transfusion during the index admission evaluated?
  • How was post-operative bleeding risk measured?
  • What does 24-hour chest drain output indicate in this context?
  • How was packed cell volume (PCV) transfusion used as an outcome measure?

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

The Cardiac Intensive Care Unit (CICU) at a tertiary care facility in Karachi, Pakistan, served as the site of this retrospective cohort study. Every procedure adhered to institutional policies, and safe data management and de-identification preserved confidentiality. Consecutive sampling was employed due to the retrospective methodology, and the sample included all eligible CICU patients who had heart surgery during the study period. The study included patients on dual antiplatelet treatment (DAPT: aspirin and/or clopidogrel) with the last dose within five days before to surgery, as well as adults between the ages of thirty and eighty undergoing heart surgery with cardiopulmonary bypass (CPB).

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
227

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

  • Pakistan
    • Sindh
      • Karachi, Sindh, Pakistan, 7480 0
        • Aga Khan University

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

All eligible patients admitted to the cardiac intensive care unit (CICU) for open-heart surgery were included.

Description

Inclusion Criteria:

  • CICU patients who underwent cardiac surgery
  • Adults aged 30-80 years undergoing cardiac surgery with cardiopulmonary bypass
  • Patients who received dual antiplatelet therapy, last dose within 5 days before surgery

Exclusion Criteria:

  • BMI > 40 kg/m²
  • Repeat open-heart surgery (reoperation)
  • Transferred open-chest procedures
  • Active liver disease
  • Chronic lung disease
  • Dialysis dependence
  • Intra-aortic balloon pump (IABP) in place pre- or post-operatively
  • Major neurological deficit within the past 6 months
  • Incomplete clinical records

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

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Frequency of platelet transfusion
Time Frame: From the day 1 of admission till discharge or 30 days of admission
The frequency of platelet transfusion during the hospital stay.
From the day 1 of admission till discharge or 30 days of admission

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Time to re-intubation
Time Frame: 30-60 seconds from laryngoscope insertion in the oral cavity tilldetection of end tidal carbon dioxide trace.
The number of times reintubation occurred, i.e. the endotracheal tube was reinserted.
30-60 seconds from laryngoscope insertion in the oral cavity tilldetection of end tidal carbon dioxide trace.

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Aga Khan University

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Khalid Siddiqui, MBBS-FCPS, Aga Khan University
  • Principal Investigator: Khalid Siddiqui, Aga Khan University

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)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 1, 2022

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
May 31, 2023

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 30, 2023

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 25, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 18, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 20, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 20, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 18, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2023-9576-27366

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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