0
Original Research: SLEEP MEDICINE |

Bench Evaluation of Flow Limitation Detection by Automated Continuous Positive Airway Pressure Devices*

Frédéric Lofaso, MD, PhD; Gilbert Desmarais, PhD; Karl Leroux; Vincent Zalc; Redouane Fodil, PhD; Daniel Isabey, PhD; Bruno Louis, PhD
Author and Funding Information

*From National Institute for Health and Medical Research (Institut National de la Santé et de la Recherche Médicale), Unit 651 (Drs. Fodil, Isabey, and Louis), Henri Mondor Teaching Hospital, Créteil; Assistance Publique des Hôpìtaux de Paris (Drs. Lofaso and Desmarais and Mr. Zalc), Raymond Poincaré Teaching Hospital, Physiology-Functional Testing, and Technological Innovations Centre, Garches, France; and People with Polio and Disabilities (Association d’Entraide des Polios et Handicapés) [Mr. Leroux], Puteaux, France.

Correspondence to: Frédéric Lofaso, MD, PhD, Service de Physiologie-Explorations Fonctionnelles, Hôpital Raymond Poincaré, 92380 Garches, France; e-mail: f.lofaso@rpc.ap-hop-paris.fr



Chest. 2006;130(2):343-349. doi:10.1378/chest.130.2.343
Text Size: A A A
Published online

Study objective: Automatic continuous positive airway pressure (CPAP) devices that adjust the pressure delivered to the patient are now available to treat sleep-disordered breathing. Sophisticated auto-CPAP devices can detect and correct flattened inspiratory flow contours (FIFCs) associated with subtle upper airway obstruction. However, evaluations of their performance are made difficult by differences across patients and devices. We performed a bench study of five commercially available auto-CPAP devices using a breath waveform simulator to evaluate sensitivity for detecting flattened inspiratory flow.

Design: Five degrees of FIFC were simulated. In addition, normal and abnormal flow contours from patients published in the literature were evaluated.

Measurements and results: One device showed autotriggering leading to CPAP increases, and another device varied the CPAP level independently from the presence of an FIFC. The three remaining devices differed regarding the detection of FIFCs and the means used to increase CPAP.

Conclusion: Based on the characteristics of each patient, physicians must choose among devices with different thresholds of FIFC detection and different pressure responses to detection. Therefore, physicians need details on the algorithms used in auto-CPAP devices. Manufacturers should supply detailed algorithms.

Figures in this Article

Sign In to Access Full Content

MEMBER & INDIVIDUAL SUBSCRIBER

Want Access?

NEW TO CHEST?

Become a CHEST member and receive a FREE subscription as a benefit of membership.

Individuals can purchase this article on ScienceDirect.

Individuals can purchase a subscription to the journal.

Individuals can purchase a subscription to the journal or buy individual articles.

Learn more about membership or Purchase a Full Subscription.

INSTITUTIONAL ACCESS

Institutional access is now available through ScienceDirect and can be purchased at myelsevier.com.

Sign In to Access Full Content

MEMBER & INDIVIDUAL SUBSCRIBER

Want Access?

NEW TO CHEST?

Become a CHEST member and receive a FREE subscription as a benefit of membership.

Individuals can purchase this article on ScienceDirect.

Individuals can purchase a subscription to the journal.

Individuals can purchase a subscription to the journal or buy individual articles.

Learn more about membership or Purchase a Full Subscription.

INSTITUTIONAL ACCESS

Institutional access is now available through ScienceDirect and can be purchased at myelsevier.com.

Figures

Tables

References

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

MEMBER & INDIVIDUAL SUBSCRIBER

Want Access?

NEW TO CHEST?

Become a CHEST member and receive a FREE subscription as a benefit of membership.

Individuals can purchase this article on ScienceDirect.

Individuals can purchase a subscription to the journal.

Individuals can purchase a subscription to the journal or buy individual articles.

Learn more about membership or Purchase a Full Subscription.

INSTITUTIONAL ACCESS

Institutional access is now available through ScienceDirect and can be purchased at myelsevier.com.

Related Content

Customize your page view by dragging & repositioning the boxes below.

CHEST Journal Articles
PubMed Articles
  • CHEST Journal
    Print ISSN: 0012-3692
    Online ISSN: 1931-3543