Optimizing Pulsatility During Cardiopulmonary Bypass to Reduce Acute Kidney Injury

NCT ID: NCT06349577

Last Updated: 2025-05-21

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

1100 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-05-19

Study Completion Date

2028-10-31

Brief Summary

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The objective is to determine the effectiveness of pulsatile flow during cardiopulmonary bypass to reduce the incidence of acute kidney injury after cardiac surgery. Investigators will also evaluate the safety and impact of pulsatile flow on clinical outcomes compared to non-pulsatile flow during cardiopulmonary bypass.

Detailed Description

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Non-pulsatile and pulsatile blood flow during cardiopulmonary bypass for cardiac surgery are both considered standard of care and allow surgeons to operate on the heart without movement. Pulsatile cardiopulmonary bypass produces variations in blood flow to produce a pulse similar to a normal beating heart. Non-pulsatile and pulsatile blood flow during cardiopulmonary bypass are approved as safe and effective ways to provide perfusion during cardiac surgery, but it is unknown whether there are differences in clinical outcomes after surgery. Acute kidney injury is common after cardiac surgery and may be caused by inadequate perfusion during cardiopulmonary bypass.

Specific Aim: The purpose of this study is to determine the effectiveness of pulsatile blood flow during cardiopulmonary bypass to reduce the incidence of acute kidney injury after cardiac surgery compared to non-pulsatile blood flow.

Hypothesis: Pulsatile blood flow during cardiopulmonary bypass will reduce the incidence of acute kidney injury after cardiac surgery compared to non-pulsatile blood flow.

Conditions

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Acute Kidney Injury Hemolysis Thrombocytopenia Surgery

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Non-pulsatile blood flow

Non-pulsatile blood flow during cardiopulmonary bypass

Group Type ACTIVE_COMPARATOR

Non-pulsatile blood flow

Intervention Type OTHER

Non-pulsatile blood flow generated by constant centrifugal pump flow rate during cardiopulmonary bypass

Pulsatile blood flow

Pulsatile blood flow during cardiopulmonary bypass

Group Type ACTIVE_COMPARATOR

Pulsatile blood flow

Intervention Type OTHER

Pulsatile blood flow generated by variable centrifugal pump flow rate during cardiopulmonary bypass

Interventions

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Non-pulsatile blood flow

Non-pulsatile blood flow generated by constant centrifugal pump flow rate during cardiopulmonary bypass

Intervention Type OTHER

Pulsatile blood flow

Pulsatile blood flow generated by variable centrifugal pump flow rate during cardiopulmonary bypass

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Able to provide informed consent
* Scheduled for elective cardiac surgery with cardiopulmonary bypass

Exclusion Criteria

* Emergency procedures
* Scheduled for heart or lung transplantation
* Scheduled for ventricular assist device implantation
* Use of the Medtronic Elongated Once-Piece Arterial Cannula
* Diagnosed with sepsis
* Diagnosed with delirium
* Experiencing hemodynamic instability (heart rate \> 100 and systolic blood pressure \< 90)
* Requiring mechanical circulatory support
* Requiring vasoactive medications
Minimum Eligible Age

18 Years

Maximum Eligible Age

85 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Heart, Lung, and Blood Institute (NHLBI)

NIH

Sponsor Role collaborator

University of Colorado, Denver

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Nathan J Clendenen, MD, MS

Role: PRINCIPAL_INVESTIGATOR

University of Colorado, Denver

Locations

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University of Colorado Hospital

Aurora, Colorado, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Nathan J Clendenen, MD,MS

Role: CONTACT

3037245000

Facility Contacts

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Nathan Clendenen, MD MS

Role: primary

References

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Demirjian S, Bashour CA, Shaw A, Schold JD, Simon J, Anthony D, Soltesz E, Gadegbeku CA. Predictive Accuracy of a Perioperative Laboratory Test-Based Prediction Model for Moderate to Severe Acute Kidney Injury After Cardiac Surgery. JAMA. 2022 Mar 8;327(10):956-964. doi: 10.1001/jama.2022.1751.

Reference Type BACKGROUND
PMID: 35258532 (View on PubMed)

Khwaja A. KDIGO clinical practice guidelines for acute kidney injury. Nephron Clin Pract. 2012;120(4):c179-84. doi: 10.1159/000339789. Epub 2012 Aug 7. No abstract available.

Reference Type BACKGROUND
PMID: 22890468 (View on PubMed)

Tan A, Newey C, Falter F. Pulsatile Perfusion during Cardiopulmonary Bypass: A Literature Review. J Extra Corpor Technol. 2022 Mar;54(1):50-60. doi: 10.1182/ject-50-60.

Reference Type BACKGROUND
PMID: 36380831 (View on PubMed)

Other Identifiers

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5K23HL151882

Identifier Type: NIH

Identifier Source: secondary_id

View Link

23-0921

Identifier Type: -

Identifier Source: org_study_id

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