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Related Experiment Videos

Auto-CPAP therapy based on the forced oscillation technique.

J H Ficker1, C F Clarenbach, C Neukirchner

  • 1Medical Department 1, University of Erlangen-Nuremberg, Erlangen, Germany. Joachim.Ficker@web.de

Biomedizinische Technik. Biomedical Engineering
|April 19, 2003
PubMed
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Autoadjusting CPAP (APAP) devices using forced oscillation technique (FOT) effectively treat OSAS. This novel APAP system offers comparable efficacy and acceptance to CPAP, with lower pressure settings, eliminating the need for manual titration.

Area of Science:

  • Respiratory Medicine
  • Sleep Medicine
  • Biomedical Engineering

Background:

  • Autoadjusting positive airway pressure (APAP) devices aim to enhance treatment quality and patient adherence for Obstructive Sleep Apnea (OSAS).
  • The efficacy of APAP systems is contingent upon their underlying control mechanisms.
  • Forced Oscillation Technique (FOT) has demonstrated potential in detecting early signs of upper airway obstruction.

Purpose of the Study:

  • To evaluate the efficacy and acceptance of a novel APAP device controlled exclusively by FOT.
  • To compare this FOT-controlled APAP system against conventional CPAP in patients with OSAS.

Main Methods:

  • 100 consecutive OSAS patients were randomized to either FOT-controlled APAP (n=50) or conventional CPAP (n=50).
  • Polysomnography was conducted on the second night of treatment to assess respiratory disturbance (Apnea-Hypopnea Index, AHI).

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  • Subjective sleepiness was measured using the Epworth Sleepiness Scale (ESS) before and after treatment.

    • Main Results:

    • Both APAP and CPAP groups showed significant normalization of respiratory disturbances (AHI) and reduced daytime sleepiness (ESS).
    • The mean treatment pressure was significantly lower in the APAP group (6.0 +/- 2.0 mbar) compared to the CPAP group (9.0 +/- 1.8 mbar; p < 0.001).
    • No significant differences were observed between the groups in terms of treatment efficacy or patient acceptance.

    Conclusions:

    • APAP treatment utilizing an FOT-exclusive control mechanism is well-accepted by OSAS patients.
    • This novel APAP device provides adequate treatment for OSAS without requiring individual CPAP titration.
    • FOT-controlled APAP presents a viable alternative to conventional CPAP, potentially offering improved patient comfort through lower pressure settings.