Prospective, Non-randomized Observational Trial of Selenium in Cardiac Surgery (SICS)

August 17, 2011 updated by: RWTH Aachen University

SICS: A Prospective, Non-randomized Observational Trial of Selenium in Cardiac Surgery

In this observational study the effect of selenium supplementation on the postoperative inflammatory response and clinical course should be examined in (approximately 100) adult patients undergoing elective heart surgery combined with extracorporeal circulation.

Selenium is one of the essential trace elements with a variety of important immunological and antioxidant properties. The pathophysiological relevance of different selenium-dependent reactions has already been demonstrated in human and in animal experiments. It is essential for the enzymatic functions of selenium-containing proteins such as the glutathione peroxidase, which in turn affects the leukotriene, thromboxane and prostacyclin metabolism. In addition, selenium has a significant influence on various liver enzymes, therefore selenium deficiency leads to oxidative or chemically induced liver damage.

Study Overview

Status

Completed

Conditions

Detailed Description

Heart Surgery on the heart-lung machine involves, inter alia, by ischemia and reperfusion, the release of reactive oxygen radicals and nitrogen oxide (NO), which damage DNA after reaction with peroxynitrite, and Lipid-/Endothelmembrane Protein. The formation and consumption of peroxynitrite can be reduced by intake of sodium selenite and the subsequent formation of selenoprotein P. Since there is no storage for selenium, but the synthesis of selenium-dependent enzymes is regulated by selenium resorption, the supplementation of selenium is a potentially useful application in patients undergoing cardiac surgery.

After induction of anaesthesia and before connecting to the heart-lung machine the patients get applied 2000μg sodium selenite (Selenase® T pro injection) intravenously (as a bolus infusion over 30 minutes).

Furthermore, they get infused 1000μg sodium-selenite on each ICU-treatment day (also about 30 minutes). In addition, various blood values are recorded daily (including selenium levels) within the routine blood samples. As the collection of these parameters is necessary anyway, it constitutes no additional burden on the patient. Shortly before the transfer to general ward there will be a final clinical examination.

In case of selenium level of 170μg per liter whole blood the employee of the laboratory immediately informs the investigator by fax and requests a new blood sample for control purposes (reference value for selenium in whole blood according to product information 100-144µg/ l). As long as the selenium level of the second sample is not higher than 230μg selenium per liter whole blood, there are no further precautions necessary according to the manufacturer's recommendations. In case of selenium level above 230μg /l, the investigator will be informed by fax without delay and the donation of investigational product will be interrupted immediately. If a patient shows clinical signs of selenium toxicity (garlic-like breath odor, fatigue, nausea, diarrhea, abdominal pain) it occurs an immediate termination of the selenium dose, initiating symptomatic counteractive measures and further control samples.

All blood samples are taken by vascular catheters, which are already set for surgery or for intensive care treatment, independent of the observational study.

Study Type

Observational

Enrollment (Anticipated)

100

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

  • Germany
      • Aachen, Germany, 52074
        • University Hospital Aachen

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Approximately 100 adult patients (male and female), capable of consenting, undergoing elective cardiac surgery on the heart-lung-machine

Description

Inclusion Criteria:

  • Age of 18 years or older
  • Elective heart surgery on the heart-lung-machine
  • Written informed consent
  • Inclusion into observational study at the latest on the last evening before surgery

Exclusion Criteria:

  • Patients not capable of consenting
  • pregnant women or women of child-bearing potential

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

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Collaborators and Investigators

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

Sponsor

RWTH Aachen 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

January 1, 2011

Primary Completion (Actual)

August 1, 2011

Study Completion (Actual)

August 1, 2011

Study Registration Dates

First Submitted

July 12, 2011

First Submitted That Met QC Criteria

July 13, 2011

First Posted (Estimate)

July 14, 2011

Study Record Updates

Last Update Posted (Estimate)

August 18, 2011

Last Update Submitted That Met QC Criteria

August 17, 2011

Last Verified

August 1, 2011

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • CTC-A 10-013 SICS

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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