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Calibration and Evaluation of an Audio Pulse Oximeter Sensor (AudioOx) at Ascent and Descent From Simulated Altitude

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01732029
First Posted: November 22, 2012
Last Update Posted: June 26, 2017
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.
Information provided by (Responsible Party):
Mark Ansermino, University of British Columbia
  Purpose
Pulse oximetry is a standard non-invasive method of measuring blood oxygen saturation (SpO2). In developing countries, pulse oximeters are rare because of expense and electricity requirements. Our ECEM group has developed the Phone Oximeter, which uses a cell phone (which are widely available in developing countries) to compute and analyze information from a pulse oximeter sensor. To further reduce costs, we have developed an oximeter sensor (AudioOx) that plugs into the audio jack of a standard cell phone. This study aims to calibrate the AudioOx by exposing 30 healthy adult volunteers to various altitudes in UBC's hypoxia chamber.

Condition Intervention
Blood Oxygen Saturation Level Heart Rate Other: Normobaric hypoxia chamber

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Calibration and Evaluation of an Audio Pulse Oximeter Sensor (AudioOx) at Ascent and Descent From Simulated Altitude

Resource links provided by NLM:


Further study details as provided by Mark Ansermino, University of British Columbia:

Primary Outcome Measures:
  • Oxygen saturation [ Time Frame: Across 3 hours ]
    Accurately calibrated AudioOx for measuring oxygen saturation


Secondary Outcome Measures:
  • Heart rate [ Time Frame: Across 3 hours ]
    Accurately calibrated AudioOx for measuring heart rate


Enrollment: 20
Study Start Date: January 2013
Study Completion Date: August 2013
Primary Completion Date: August 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Normobaric hypoxia chamber
Study subjects will be put into a hypoxic state by exposing them to normobaric hypoxia by administrating an air mix containing a reduced O2 concentration. This is achieved in a hypoxia chamber where O2 concentration is gradually reduced to simulate high altitude (about 4500 m).
Other: Normobaric hypoxia chamber

  Show Detailed Description

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Non-smokers
  • UBC students age 18 and older or non-university students age 19 and older
  • No medical history of respiratory, cardiovascular and neurological problems (capable of undergoing controlled hypoxemia down to SpO2 of 70%).

Exclusion Criteria:

  • Medical history including respiratory, cardiovascular and neurological problems
  • Smokers or individuals exposed to high levels of carbon monoxide that result in elevated carboxyhemoglobin levels (interferes with oximetry readings)
  Contacts and Locations
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 ClinicalTrials.gov identifier (NCT number): NCT01732029


Locations
Canada, British Columbia
BC Children's Hospital
Vancouver, British Columbia, Canada, V6H 3V4
Sponsors and Collaborators
University of British Columbia
  More Information

Additional Information:
Responsible Party: Mark Ansermino, Principle Investigator, University of British Columbia
ClinicalTrials.gov Identifier: NCT01732029     History of Changes
Other Study ID Numbers: H12-02365
First Submitted: November 16, 2012
First Posted: November 22, 2012
Last Update Posted: June 26, 2017
Last Verified: June 2017

Keywords provided by Mark Ansermino, University of British Columbia:
pulse oximeter
oxygen saturation
heart rate
calibration
accuracy