0
Clinical Investigations: SLEEP |

Analysis of Inspiratory Flow Shapes in Patients With Partial Upper-Airway Obstruction During Sleep*

Tero Aittokallio, MSc; Tarja Saaresranta, MD; Päivi Polo-Kantola, MD, PhD; Olli Nevalainen, MSc, PhD; Olli Polo, MD, PhD
Author and Funding Information

*From the Turku Centre for Computer Science (Mr. Aittokallio); the Department of Mathematical Sciences (Dr. Nevalainen), University of Turku; the Department of Pulmonary Diseases and Clinical Allergology (Dr. Saaresranta), Turku University Central Hospital; the Department of Obstetrics and Gynecology (Dr. Polo-Kantola), Turku University Central Hospital; and Department of Physiology (Dr. Polo), University of Turku, Turku, Finland.

Correspondence to: Tero Aittokallio, MSc, Turku Centre for Computer Science, Lemminkäisenkatu 14 A, 20520 Turku, Finland; e-mail: tero.aittokallio@cs.utu.fi



Chest. 2001;119(1):37-44. doi:10.1378/chest.119.1.37
Text Size: A A A
Published online

Study objective: To study the spectrum of inspiratory flow signal shapes in patients with partial upper airway obstruction during sleep.

Design: We identified seven different inspiratory flow shapes and determined their frequencies in two groups of patients (10 postmenopausal women and 19 men after surgical treatment for sleep apnea) and in 9 control subjects.

Setting: Sleep research unit, Department of Physiology, University of Turku, Finland.

Measurements and results: Nasal flow was recorded with nasal prongs. The shape analyses were performed with an automated attribute grammar recognizer. The inspiratory flow-shape distributions differed significantly between patients and control subjects. The flow shapes were also different between postmenopausal women and men after uvulopalatopharyngoplasty.

Conclusions: The differences in the inspiratory flow-shape distributions between the control subjects and the two patient groups suggest that the upper airways behave differently in the three study groups. Automated inspiratory flow-shape analysis seems to be a promising tool to distinguish patient groups with different upper airway function to be treated with different treatment alternatives. The physiologic correlates of each flow-shape class remain to be elucidated.

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.

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