Source: http://www.google.es/patents/US8136521
Timestamp: 2017-05-29 09:55:08
Document Index: 478230468

Matched Legal Cases: ['§120', '§120', '§120', '§119', 'application No. 60', 'application No. 60']

Patente US8136521 - Auto-titration bi-level pressure support system and method of using same - Google PatentesBúsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »Iniciar sesiónPatentesA bi-level pressure support system and method of treating disordered breathing that optimizes the pressure delivered to the patient during inspiration and expiration to treat the disordered breathing while minimizing the delivered pressure for patient comfort. The pressure generating system generates...http://www.google.es/patents/US8136521?utm_source=gb-gplus-sharePatente US8136521 - Auto-titration bi-level pressure support system and method of using same Búsqueda avanzada de patentesTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents. Número de publicaciónUS8136521 B2Tipo de publicaciónConcesión Número de solicitudUS 11/924,259 Fecha de publicación20 Mar 2012 Fecha de presentación25 Oct 2007 Fecha de prioridad12 Oct 2001TarifaPagadasTambién publicado comoCA2621119A1, CA2621119C, CN101299963A, CN101299963B, EP1921990A2, EP1921990A4, US7938114, US9629970, US20060000475, US20080041382, US20080041383, US20120152252, WO2007027888A2, WO2007027888A3 Número de publicación11924259, 924259, US 8136521 B2, US 8136521B2, US-B2-8136521, US8136521 B2, US8136521B2 InventoresGreg Matthews, Winslow K Duff, Daniel Martin, Uday S Shankar, Heather Ressler Cesionario originalRic Investments, LlcExportar citaBiBTeX, EndNote, RefManCitas de patentes (42), Citada por (11), Clasificaciones (17), Eventos legales (1) Enlaces externos: USPTO, Cesión de USPTO, EspacenetAuto-titration bi-level pressure support system and method of using same
US 8136521 B2 Resumen
12. The system of claim 11, wherein the shape parameters monitored by the controller during an apnea/hypopnea period include a flatness of an inspiratory portion of a flow waveform, a roundness of the inspiratory portion of the flow waveform, a skewness of the inspiratory portion of the flow waveform. Descripción
This application is Continuation and claims priority under 35 U.S.C. §120 from U.S. patent application Ser. No. 11/217,964, filed Sep. 1, 2005, now U.S. Pat. No. 7,938,114, which is a Continuation-In-Part and claims priority under 35 U.S.C. §120 from U.S. patent application Ser. No. 10/788,507, filed Feb. 27, 2004, now U.S. Pat. No. 7,827,988, which is a Continuation-In-Part and claims priority under 35 U.S.C. §120 from U.S. patent application Ser. No. 10/268,406 filed Oct. 10, 2002, now U.S. Pat. No. 7,168,429, which claims priority under 35 U.S.C. §119(e) from U.S. provisional patent application No. 60/329,250 filed Oct. 12, 2001 and U.S. provisional patent application No. 60/331,838 filed Nov. 20, 2001, the contents of each of which are incorporated herein by reference.
In a preferred embodiment of the present invention, shifting the template to overlie the patient inspiratory waveform is accomplished by determining a center C of the patient inspiratory waveform and using this center as a new center for the sine wave template. Center C of patient inspiratory waveform 410 is determined by finding the points 416 and 418 on the inspiratory waveform that corresponds to the FFB value. Finding the points 416 and 418 on the inspiratory waveform that corresponds to the FFB value is accomplished by searching up or down from the known landmark points 366 and 368, which correspond to the sine base value (½ FFB). This search is indicated by arrows 420 and 422. Once the FFB points are located on inspiratory waveform 410, the center C of the inspiratory waveform is taken as ½ the distance between these FFB points (416 and 418). Now that center C of inspiratory waveform is located, the location points defining sine wave template 412 can be recalculated about this center.
If the patient's inspiratory flow waveform has improved or degraded during ramp 506, the ramping and trending continues until the improvement or degradation ceases, for example the patient's condition changes from (3) to (2.5) or the patient's condition changes from (1) to (2). For the case where the patient condition changes from (3) to (2.5), the auto-titration controller 354 will decrease IPAP by some small amount, typically 0.5 cmH2O, and then a 5-minute hold period will be started, as indicated by pressure curve 508. If there is no improvement during the ramp, i.e., the patient's inspiratory flow profile stays the same—condition (2) or condition (2.5), auto-titration controller 354 decreases the IPAP 2.0 cmH2O, as indicated by pressure curve 510, and a 5 minute hold period 512 is then started. This sequence of pressure control is intended to determine if flow limitation exists in the waveforms, and to locate an ideal pressure at which flow limitation no longer exists. If flow limitation is detected during any hold period (indicating that the patient may have changed position or sleep stage), the slow ramp up will again be initiated.
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