Chronic Obstructive Pulmonary Disease Clinical Trial
Official title:
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.
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.
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Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science
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