Respiratory Physiology Under High Flow Therapy

March 23, 2015 updated by: Georg Nilius, Institut für Pneumologie Hagen Ambrock eV

Respiratory Physiology Measurements Under Transnasal High Flow Therapy in Patients With Tracheostoma After Long Term Ventilation

The aim of this study is to gain knowledge about effects of high flow transnasal insufflation on various breathing parameters like intratracheal pressure conditions, CO2 elimination, breathing frequency and tidal volume.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Ten patients, who are supplied with a tracheostomy stent (placeholder) for reinsertions after long term ventilation will be treated for a short time during the day with the nasal high flow system AIRVO at different flow rates (15, 30, 45L/min) to estimate possible long term implications of high flow treatment.

Respiration is measured by impedance plethysmography with a calibrated belt system (Respitrace, VIASYS). Pressure and end tidal CO2 concentration is measured inside of the placeholder.

The order of the high flow rates (15, 30, 45L/min) is randomized; each flow rate is measured for 15 minutes. A wash out time of ten minutes is planned after each phase. In this time the patient breathes his individual oxygen flow rate with attention to the oxygen saturation, which should not exceed 96%. Transcutaneous PCO2 and SpO2 is monitored with TOSCA during the study.

Study Type

Interventional

Enrollment (Actual)

10

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

  • Germany
    • NRW
      • Hagen, NRW, Germany, 58091
        • Helios Klinik Hagen Ambrock

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:

  • Patients in a stable weaning phase after long term ventilation
  • Patients supplied with tracheostomy stent (placeholder)
  • Patients in stable respiratory situation

Exclusion Criteria:

  • Incapable of giving consent
  • Any other severe or acute physical illness which requires intensive medical care

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: Basic Science
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: High flow therapy
Procedure: High flow therapy
Each patient is treated with nasal high flow at different flow rates (15, 30, 45L/min). The order of flow rates is randomized. Each flow rate will be used for 15 minutes. A wash out time of ten minutes is planned after each phase, during which the patient uses his his individual oxygen flow.
Other Names:
  • AIRVO (Fisher and Paykel)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Intratracheal pressure conditions
Time Frame: 2 hours
The effects of high flow transnasal insufflation on intratracheal pressure conditions is measured with the Hans Rudolph Inc. pressure amplifier and continuously recorded breath by breath.
2 hours

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Intratracheal endtidal CO2 concentration
Time Frame: 2 hours
The effects of high flow transnasal insufflation on endtidal CO2 concentration is measured with the AD Instruments gas analyser and continuously recorded breath by breath.
2 hours
Breathing frequency and tidal volume
Time Frame: 2 hours
The effects of high flow transnasal insufflation on breathing frequency and tidal volume is measured with the Viasys Respitrace calibrated belt system and continuously recorded breath by breath.
2 hours

Collaborators and Investigators

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

Sponsor

Institut für Pneumologie Hagen Ambrock eV

Investigators

  • Principal Investigator: Georg Nilius, MD, Helios Klinik Hagen Ambrock, Germany

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

December 1, 2011

Primary Completion (Actual)

December 1, 2014

Study Completion (Actual)

December 1, 2014

Study Registration Dates

First Submitted

December 22, 2011

First Submitted That Met QC Criteria

January 12, 2012

First Posted (Estimate)

January 13, 2012

Study Record Updates

Last Update Posted (Estimate)

March 24, 2015

Last Update Submitted That Met QC Criteria

March 23, 2015

Last Verified

March 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Trachea 2.0

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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