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High frequency percussive ventilation for respiratory immobilization in radiotherapy
Ina M Sala1,2, Girish B Nair3,4, Beverly Maurer5
1William Beaumont Hospital, Department of Radiation Oncology, Royal Oak, MI, United States.
Technical Innovations & Patient Support in Radiation Oncology
|February 26, 2020
Summary
High frequency percussive ventilation (HFPV) significantly reduced chest wall motion in healthy volunteers. This technique shows promise for immobilizing the thorax during radiotherapy, especially for SBRT and proton therapy.
Area of Science:
- Medical Physics
- Respiratory Physiology
Background:
- Respiratory motion during radiotherapy can lead to inaccurate radiation delivery.
- Current methods for motion management have limitations.
Purpose of the Study:
- To evaluate High Frequency Percussive Ventilation (HFPV) for respiratory motion immobilization in radiotherapy.
- To assess the feasibility and effectiveness of HFPV using different oral interfaces.
Main Methods:
- Fifteen healthy volunteers underwent HFPV with three distinct oral interfaces.
- Chest wall motion was monitored using an external respiratory motion laser system.
- Physiological parameters (PO2, tc-CO2) were monitored throughout the sessions.
Main Results:
- HFPV drastically reduced chest wall motion in all volunteers.
- The technique was well tolerated, with no significant adverse physiological effects reported.
- Sixty-two percussive sessions were analyzed, confirming consistent motion reduction.
Conclusions:
- HFPV is a promising technique for thoracic immobilization during radiotherapy.
- It may be particularly beneficial for advanced techniques like Stereotactic Body Radiation Therapy (SBRT) and pencil beam scanning proton therapy.
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