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Respiratory Health

Advancing respiratory health through innovative therapies

Hill-Rom® Respiratory Care

  1. Independent lab testing analyzed and compared average airflows at the mouth generated by high frequency chest wall oscillation (HFCWO) therapy in 10 subjects using home care garments. Airflows measured at commonly prescribed medium pressures (50% of maximum) at multiple therapy frequencies (5, 10, 15, and 20 Hz). Test data and reports on file at Hill-Rom, Inc.
  2. Market data and reports on file with Hill-Rom, Inc.
  3. Clinical studies with patients using HFCWO therapy as listed in a PubMed search through 2015. Includes HFCWO devices from Hill-Rom, Electromed, International Biophysics Corporation and Respiratory Technologies, Inc. On file at Hill-Rom, Inc.
  4. Warwick W, Hansen L. The long-term effect of high-frequency chest compression therapy on pulmonary complications of cystic fibrosis. Pediatr Pulmonol 1991; 11: 265-271.
  5. Nicolini A, Cardini F, Landucci N, et al. Effectiveness of treatment with high-frequency chest wall oscillation in patients with bronchiectasis. BMC Pulm Med 2013; 13-21.
  6. Report prepared by Milliman for Hill-Rom on January 16, 2012. Results in this report are technical in nature and are dependent upon specific assumptions and methods. Reference on file at Hill-Rom, Inc.
  7. King M, et al. Tracheal mucus clearance in high-frequency oscillation. II: Chest wall versus mouth oscillation. Am Rev Respir Dis, 1984. 130(5): p. 703-6.
  8. Freitag L, et al. Removal of excessive bronchial secretions by asymmetric high-frequency oscillations. J Appl Physiol 1989; 67: 614-9.
  9. Sound testing results based on an average noise level at 4 microphone positions at 1 meter.  Sound for each device measured at medium pressure at frequencies of 5, 10, 15, and 20 Hz.  A comfortable hearing level is typically considered at 60 dB and lower.  Reference on file at Hill-Rom, Inc.
  10. About the connection between sound level and loudness, there are various theories.  Research by Richard M. Warren leads to a level difference of 6 dB.*  This means that a double sound pressure corresponds to a double loudness.  Richard M. Warren, "Elimination of Biases in Loudness Judgments for Tones."