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Effects of Oxygen on Lung Tissue During Anesthesia

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified January 2009 by Vanderbilt University.
Recruitment status was:  Active, not recruiting
Information provided by:
Vanderbilt University Identifier:
First received: July 10, 2008
Last updated: January 27, 2009
Last verified: January 2009

Collect exhaled breath condensates from patients scheduled for a routine surgical procedure before, during, and after surgery for measurements of IsoFs

Draw blood from patients scheduled for a routine surgical procedure before, during, and after surgery for measurements of serum thrombomodulin.

Lung Injury, Acute

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Effects of Oxygen on Lung Tissue During Anesthesia

Resource links provided by NLM:

Further study details as provided by Vanderbilt University:

Biospecimen Retention:   None Retained

Estimated Enrollment: 40
Study Start Date: June 2008
Estimated Study Completion Date: August 2009
Estimated Primary Completion Date: June 2009 (Final data collection date for primary outcome measure)
Detailed Description:
High concentrations of oxygen are routinely administered to patients undergoing routine surgical procedures even though it is highly likely, at least in patients with normal lung function, that this is unnecessary and in fact may be doing unnecessary harm. Therefore, we plan to assess whether there is any evidence of lung injury during surgery resulted from administration of high concentrations of oxygen by measuring Isofurans (IsoFs) in exhaled breath condensate. In our studies in mice that were exposed to high concentrations of oxygen we also found that circulating levels of thrombomodulin were increased. Thrombomodulin is present in endothelial cells and upon injury they release thrombomodulin into the circulation. Endothelial cell injury is known to occur in hyperoxic-induced lung injury. Therefore, in addition to measuring IsoFs in exhaled breath condensate we will also measure plasma concentrations of thrombomodulin as an indicator of endothelial injury.

Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients scheduled for a routine surgical procedure

Inclusion Criteria:

  • American Society of Anesthesiologists (ASA) Class I-III.
  • Patient is undergoing elective surgery requiring mechanical ventilation
  • Patient is an adult, 18 - 80 years old.
  • Subject has voluntarily signed and dated the informed consent document approved by the Institutional Review Board (IRB).

Exclusion Criteria:

  • Surgical procedures boarded for less than 2 hours
  • Current Smoker
  • All Cardiac, Thoracic and/or Vascular surgeries involving the chest
  • Patient unable to cooperate.
  • Chronic airway diseases
  • Asthma
  • Medical contraindication to anesthetic technique (allergy, cardiac condition, neurologic condition, localized infection, bleeding disorder).
  • Subjects who are pregnant.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00715338

United States, Tennessee
Vanderbilt University Medical Center
Nashville, Tennessee, United States, 37212
Sponsors and Collaborators
Vanderbilt University
Principal Investigator: John A Barwise, M.D. Vanderbilt University Medical Center
  More Information

Additional Information:
Responsible Party: John Barwise, Assistant Professor Anesthesiology - Critical Care Division, Vanderbilt University Medical Center Identifier: NCT00715338     History of Changes
Other Study ID Numbers: 70808
Study First Received: July 10, 2008
Last Updated: January 27, 2009

Keywords provided by Vanderbilt University:
Exhaled Breath Condensate
elective surgery
mechanical ventilation

Additional relevant MeSH terms:
Lung Injury
Acute Lung Injury
Lung Diseases
Respiratory Tract Diseases
Thoracic Injuries
Wounds and Injuries processed this record on March 24, 2017