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<p>Postoperative pulmonary complications, especially pneumonia, are major risks following abdominal and thoracic surgeries, particularly in elderly patients and those with chronic respiratory conditions. Existing airway clearance devices are limited in functionality and accessibility. This study developed and evaluated an acoustic vibration-based airway clearance device (ACD) aimed at enhancing sputum clearance through an acoustic vibration. A phantom model simulating thoracic anatomy was constructed with soft silicone elastomer (Ecoflex™ 00–30) by casting and polymer (Polylactic Acid (PLA) filament) by 3D printing. Sinusoidal acoustic vibrations from 10 to 60&#xa0;Hz were applied using a speaker, and output acceleration was measured via an embedded sensor. A wearable vest prototype incorporating 10 vibration speakers was then developed and tested in a pilot clinical trial involving 18 healthy adults. Participants rated perceived vibration intensity across frequencies from 10 to 100&#xa0;Hz. Phantom tests showed maximum vibration transmission and minimal phase difference at 30–40&#xa0;Hz, indicating resonance behavior. Clinical results demonstrated increasing perception scores with frequency, plateauing above 80&#xa0;Hz, with the highest intensity reported at 100&#xa0;Hz. Overweight participants tended to perceive stronger vibrations compared to those with normal BMI. The findings suggest that the ACD effectively transmits acoustic vibrations in the 30–40&#xa0;Hz range and is perceived strongly at higher frequencies, indicating potential for clinical use in sputum clearance. The compact vest design allows for use in various clinical settings, including general wards, with advantages in comfort and cost. Future development should improve ease of use and incorporate infection control measures to enhance practicality and safety.</p>

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Development of Airway Clearance Device by Volumetric Body Vibration

  • 期刊论文

  • 发表日期：

    2026年3月2日

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  • Sang-Ho Jeong,
  • SangJoon Moon,
  • Won-Shik Chu

摘要

Postoperative pulmonary complications, especially pneumonia, are major risks following abdominal and thoracic surgeries, particularly in elderly patients and those with chronic respiratory conditions. Existing airway clearance devices are limited in functionality and accessibility. This study developed and evaluated an acoustic vibration-based airway clearance device (ACD) aimed at enhancing sputum clearance through an acoustic vibration. A phantom model simulating thoracic anatomy was constructed with soft silicone elastomer (Ecoflex™ 00–30) by casting and polymer (Polylactic Acid (PLA) filament) by 3D printing. Sinusoidal acoustic vibrations from 10 to 60 Hz were applied using a speaker, and output acceleration was measured via an embedded sensor. A wearable vest prototype incorporating 10 vibration speakers was then developed and tested in a pilot clinical trial involving 18 healthy adults. Participants rated perceived vibration intensity across frequencies from 10 to 100 Hz. Phantom tests showed maximum vibration transmission and minimal phase difference at 30–40 Hz, indicating resonance behavior. Clinical results demonstrated increasing perception scores with frequency, plateauing above 80 Hz, with the highest intensity reported at 100 Hz. Overweight participants tended to perceive stronger vibrations compared to those with normal BMI. The findings suggest that the ACD effectively transmits acoustic vibrations in the 30–40 Hz range and is perceived strongly at higher frequencies, indicating potential for clinical use in sputum clearance. The compact vest design allows for use in various clinical settings, including general wards, with advantages in comfort and cost. Future development should improve ease of use and incorporate infection control measures to enhance practicality and safety.