In vitro comparative study of wall portbased high-frequency chest wall oscillation device and internal air-pulse...

Area of Science:

• Biomedical Engineering
• Respiratory Therapy

Background:

• Increasing use of High-Frequency Chest Wall Oscillation (HFCWO) devices due to environmental and disease factors.
• Need for cost-effective and accessible HFCWO solutions in hospital settings.

Purpose of the Study:

• To develop and evaluate a novel, actuator-less HFCWO device.
• To assess its performance against a commercial HFCWO device (VEST-205).

Main Methods:

• Designed an actuator-less HFCWO prototype utilizing hospital external wall port utilities.
• Incorporated electric pressure regulator and solenoid valves for intensity and frequency adjustment.
• Compared prototype performance (pressure waveforms, sound levels) against a commercial device in vitro.

Main Results:

• Prototype achieved similar local maximum pressures to VEST-205 (<3 mmH2O difference).
• Prototype exhibited significantly higher local minimum pressures (>8 mmH2O difference) than VEST-205.
• Proposed device generated higher driving sound levels (17.0-17.8 dB) compared to VEST-205.

Conclusions:

• The proposed actuator-less HFCWO device shows potential as a cost-effective alternative for specific clinical conditions.
• Further modifications are needed to enhance performance and clinical usability.
• The device leverages external pneumatic utilities, reducing reliance on embedded mechanical components.