Normothermia Versus Hypothermia for Valvular Surgery Patients

October 30, 2013 updated by: Efremov Sergey, Meshalkin Research Institute of Pathology of Circulation

Normothermia Versus Hypothermia for Patients With Valvular Heart Disease Operated Under Cardiopulmonary Bypass.

Cardiopulmonary bypass (CPB) has been used successfully for cardiac surgery for over half a century. Hypothermia became a ubiquitous practice for adult patients undergoing CPB. To date, most studies have been conducted in coronary artery bypass graft (CABG) patients with conflicting results. Current evidence does not support one temperature management strategy for all patients. The purpose of this study is to compare the efficiency and safety of normothermic versus hypothermic CPB in valvular surgery patients.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

140

Phase

  • Not Applicable

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

  • Russian Federation
      • Novosibirsk, Russian Federation, 630055
        • State Research Institute of Circulation Patholody

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

20 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Isolated heart valve surgery
  • Heart valve surgery plus CABG
  • Age 20-80

Exclusion Criteria:

  • urgent operation
  • Left ventricle ejection fraction < 35%
  • Decompensated congestive heart failure
  • Chronic renal failure (glomerular filtration rate < 60 ml/min)
  • Severe hepatic and pulmonary disease
  • Bleeding diathesis or history of coagulopathy
  • Planed deep hypothermic circulatory arrest
  • History of acute myocardial infarction in the last 3 month
  • Preoperative core temperature >37oC

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

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
No Intervention: Normothermic CPB
Standard management. Patients will be kept at normothermia throughout the procedure (>36oC).
Active Comparator: Hypothermic CPB
Patients will be cooled to 31-32oC (nasopharyngeal) after the beginning of CPB. Rewarming will begin 10-15 min before release of aortic cross-clamp. The gradient between heat-exchanger and nasopharynx during rewarming will be maintained at 3oC. The rewarming will be stopped at 36,5oC.
Procedure: Hypothermic CPB
Patients will be cooled to 31-32oC (nasopharyngeal) after the beginning of CPB. Rewarming will begin 10-15 min before release of aortic cross-clamp. The gradient between heat-exchanger and nasopharynx during rewarming will be maintained at 3oC. The rewarming will be stopped at 36,5oC

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Cardiac Troponin I release
Time Frame: 48 hours
48 hours

Secondary Outcome Measures

Outcome Measure
Time Frame
Intensive Care Unit length of stay
Time Frame: 30 postoperative days
30 postoperative days
Hospital length of stay
Time Frame: 30 postoperative days
30 postoperative days
Need for Inotropic Support
Time Frame: First 48 postoperative hours
First 48 postoperative hours
Rate of Perioperative Myocardial Infarction
Time Frame: First 48 postoperative hours
First 48 postoperative hours
Rate of Type I and Type II neurological injury
Time Frame: 7 postoperative days
7 postoperative days
Rate of Dialysis-dependent acute renal failure
Time Frame: 7 postoperative days
7 postoperative days
Rate of infectious complications
Time Frame: 30 postoperative days
30 postoperative days
Total units of Red Blood Cells transfused
Time Frame: 7 postoperative days
7 postoperative days
Rate of In-hospital mortality
Time Frame: 30 postoperative days
30 postoperative days
NT-proBNP release
Time Frame: First 24 postoperative hours
First 24 postoperative hours
Bleeding from chest tubes
Time Frame: First 24 postoperative hours
First 24 postoperative hours

Collaborators and Investigators

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

Sponsor

Meshalkin Research Institute of Pathology of Circulation

Investigators

  • Principal Investigator: Vladimir V Lomivorotov, MD, PhD, Research Institute of Pathology of Circulation

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

April 1, 2011

Primary Completion (Actual)

January 1, 2013

Study Completion (Actual)

April 1, 2013

Study Registration Dates

First Submitted

April 18, 2011

First Submitted That Met QC Criteria

April 19, 2011

First Posted (Estimate)

April 20, 2011

Study Record Updates

Last Update Posted (Estimate)

November 1, 2013

Last Update Submitted That Met QC Criteria

October 30, 2013

Last Verified

October 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • HYPO-2010

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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