Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1994-12-02
1998-04-21
Millin, Vincent
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820418, 12820423, A61M 1600
Patent
active
057407959
ABSTRACT:
Apparatus and methods for the estimation of flow and the detection of breathing (respiration) in continuous positive airway pressure (CPAP) treatment are disclosed. CPAP apparatus typically includes a flow generator for supplying air to a mask via a gas delivery tube. With changing air flow, the flow generator's speed and/or driving electrical current will alter in a manner defined by the controlling circuitry. Signals can be derived from measurements of motor speed and current, and these signals vary cyclically with patient respiration. By filtering to reject non-respiratory components, the resultant signal can be utilised to determine the instants in time at which the patient starts to inhale and exhale. The filtered signal also can be linearised using a predetermined knowledge of the pressure/flow/speed characteristics of the flow generator, and thus to derive a volumetric measure of airflow.
REFERENCES:
patent: 3834383 (1974-09-01), Weigl et al.
patent: 3840006 (1974-10-01), Buck et al.
patent: 3863630 (1975-02-01), Cavallo
patent: 3961627 (1976-06-01), Ernst et al.
patent: 3972327 (1976-08-01), Ernst et al.
patent: 4239039 (1980-12-01), Thompson
patent: 4347468 (1982-08-01), Wilke
patent: 4430995 (1984-02-01), Hilton
patent: 4537190 (1985-08-01), Caillot et al.
patent: 4570631 (1986-02-01), Durkan
patent: 4630614 (1986-12-01), Atlas
patent: 4637386 (1987-01-01), Baum
patent: 4686974 (1987-08-01), Sato et al.
patent: 4782832 (1988-11-01), Trimble et al.
patent: 4823788 (1989-04-01), Smith et al.
patent: 4828257 (1989-05-01), Hatch
patent: 4905687 (1990-03-01), Ponkala
patent: 4915103 (1990-04-01), Visveshwara et al.
patent: 4938212 (1990-07-01), Snook et al.
patent: 5024219 (1991-06-01), Dietz
patent: 5117819 (1992-06-01), Servidio et al.
patent: 5239995 (1993-08-01), Estes et al.
patent: 5245995 (1993-09-01), Sullivan et al.
patent: 5385142 (1995-01-01), Brady et al.
patent: 5443061 (1995-08-01), Champain et al.
patent: 5490502 (1996-02-01), Rapoport et al.
patent: 5535738 (1996-07-01), Estes et al.
Philipson, Eliot A., Sleep Apnea--A Major Public Health Problem (Editorials), The New England Journal of Medicine, Apr. 29, 1993; 328 (17), pp. 1271-1273.
Dement et al., It's Time to Wake Up to the Importance of Sleep Disorders, JAMA, Mar. 24/31, 1993-vol. 269, No. 12, pp. 1548-1549.
Images of the Twenty-First Century, Yongmin K., Seplman F. A.Seattle, Nov. 9-12, 1989, vol. II Part 1/06.
A Microprocessor-Based Sleep Apnea Ventilator, K. Behbehani et al., IEEE Engineering in Medicine & Biology Society 11th Annual International Conference, Ch. 2770, Jun. 1989, pp. 332-333.
Abstract--94308936.7.
Deane, Jr. William J.
Millin Vincent
ResMed Limited, an Australian Company
LandOfFree
Estimation of flow and detection of breathing in CPAP treatment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Estimation of flow and detection of breathing in CPAP treatment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Estimation of flow and detection of breathing in CPAP treatment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2050880