Conservation of Red Cell Mass , Oxygen Supply and Demand in Cardiac Surgery

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00660608
Recruitment Status : Completed
First Posted : April 17, 2008
Last Update Posted : July 5, 2010
Daxor Corporation
Information provided by:
Virginia Commonwealth University

Brief Summary:
Fifty patients will be enrolled into the study. The purpose of the study is to investigate the relevance of Hct levels in determining need for transfusion during operations employing bypass as well as to test the hypothesis that, while HCt levels may decrease during surgery , red blood cell mass and tissue oxygenation remain fairly constant.

Condition or disease
Coronary Artery Disease

Detailed Description:
Fifty adults( male or female-nonpregnant) whose weight is between 55-85 kg and are scheduled to undergo elective cardiac surgery with cardiopulmonary bypass for CABG or primary valve repair or replacement will be eligible. Patients with any history of abnormal bleeding disorders, urgent or emergent need for surgery, and combination surgeries will be excluded. Blood volume analysis will be performed with the DAXOR Blood Volume Analyzer BVA-100 System and the Volumex HSA I-131 radiopharmaceutical for use for determining circulating volume. Multiple timed sample points will be obtained. The DAXOR blood volume analyzer will batch samples and with input of patients height, weight, gender, time of draw, and corresponding Hct, calculate circulating total blood volume. We hypothesize that Total red cell mass is relatively well conserved( <20% decrease) during and immediately after surgery as long as major bleeding does not occur. We hypothesize that decrease in Hct during surgery are related to changes in circulating plasma volume. Total red cell O2 carrying capacity and O2 economics will be measured and it is also hypothesized that lowered Hct values, even as low as 15%, do not independently signal a tissue or whole body O2 deficit.

Study Type : Observational
Estimated Enrollment : 50 participants
Observational Model: Case Control
Time Perspective: Prospective
Official Title: Conservation of Red Cell Mass, Oxygen Supply and Demand in Cardiac Surgery
Study Start Date : April 2008
Actual Primary Completion Date : April 2010
Actual Study Completion Date : April 2010

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Ages Eligible for Study:   18 Years to 90 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
Pre-OP, surgery clinics, inpatients

Inclusion Criteria:

  • Patient scheduled to undergo elective Cabg or primary repair/replacement on bypass pump.
  • Age 18 yrs or older
  • Male or non pregnant female
  • Weight between 55-85 kg.

Exclusion Criteria:

  • Any known bleeding risks;
  • Urgent or emergent surgery;
  • Combined aortic and major vascular surgery;
  • Pregnant women
  • If participating in another study within last 90 days.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00660608

United States, Virginia
VCU Medical Center
Richmond,, Virginia, United States, 23298
Sponsors and Collaborators
Virginia Commonwealth University
Daxor Corporation
Principal Investigator: Mark Nelson, MD VCU Medical Center
Study Chair: Carlos Arancibia, MD VCU Medical Center

Responsible Party: Mark Nelson, MD, VCU Medical Center Identifier: NCT00660608     History of Changes
Other Study ID Numbers: BVA 100
First Posted: April 17, 2008    Key Record Dates
Last Update Posted: July 5, 2010
Last Verified: July 2010

Keywords provided by Virginia Commonwealth University:
Transfusion regulation

Additional relevant MeSH terms:
Coronary Artery Disease
Myocardial Ischemia
Coronary Disease
Heart Diseases
Cardiovascular Diseases
Arterial Occlusive Diseases
Vascular Diseases