Pressure support system with machine delivered breaths
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16K-031/02
A61M-016/00
출원번호
US-0201937
(2010-01-22)
등록번호
US-9259544
(2016-02-16)
국제출원번호
PCT/IB2010/050292
(2010-01-22)
§371/§102 date
20110817
(20110817)
국제공개번호
WO2010/097716
(2010-09-02)
발명자
/ 주소
Kane, Michael T.
Matthews, Gregory
Shelly, Benjamin Irwin
Ressler, Heather Dawn
출원인 / 주소
KONINKLIJKE PHILIPS N.V.
대리인 / 주소
Haas, Michael W.
인용정보
피인용 횟수 :
0인용 특허 :
16
초록▼
A method of operating a ventilator or pressure support system that automatically determines a timed back up rate for the patient based on the patient's spontaneous breathing patterns. The aggressiveness of the determined rate increases as the patient takes less spontaneous breaths. Also, a method wh
A method of operating a ventilator or pressure support system that automatically determines a timed back up rate for the patient based on the patient's spontaneous breathing patterns. The aggressiveness of the determined rate increases as the patient takes less spontaneous breaths. Also, a method wherein one or more mechanisms are used to determine whether a machine breath should be issued. Each mechanism consists of a basic timing element coupled with one or more logical permits. Both the timing element and each of the one or more logical permits must be satisfied to allow the timing mechanism to trigger a machine breath.
대표청구항▼
1. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied
1. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied based on the data relating to respiratory activity of the patient; andproviding a machine breath to the patient if it is determined that all of the one or more logical permits are satisfied, wherein the one or more logical permits include a first logical permit relating to expiration of the patient and wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, and wherein expiration of the patient is deemed to be complete in response to analyzing patient flow over a predetermined period and observing a point in time wherein both a derivative of the patient flow and an absolute value of the patient flow are less than a predetermined value. 2. The method according to claim 1, wherein the analyzing comprises integrating the patient flow into tidal volume data, and creating a plurality of tidal volume groups each corresponding to a predetermined duration from the tidal volume data, each tidal volume group comprising a sum of the tidal volume data of the tidal volume group, wherein at any particular point in time the derivative is determined by determining an absolute value of a difference between the sum for the tidal volume group associated with the particular point in time and the sum for the tidal volume group immediately preceding the tidal volume group associated with the particular point in time, and wherein the absolute value of the patient flow at the particular point in time is equal to the absolute value of the sum for the tidal volume group associated with the particular point in time. 3. The method according to claim 2, wherein the predetermined value is 100 ml. 4. The method according to claim 1, further comprising integrating the patient flow into tidal volume data, and creating a plurality of tidal volume groups each corresponding to a predetermined duration from the tidal volume data, each tidal volume group comprising a sum of the tidal volume data of the tidal volume group, wherein expiration of the patient is deemed to be complete in response to both: (i) determining that an absolute value of a difference between the sum for the tidal volume group associated with a particular point in time and the sum for the tidal volume group immediately preceding the tidal volume group associated with the particular point in time is less than a predetermined value, and (ii) determining that an absolute value of the sum for the tidal volume group associated with the particular point in time is less than the predetermined value. 5. The method according to claim 4, wherein the predetermined value is 100 ml. 6. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied based on the data relating to respiratory activity of the patient; andproviding a machine breath to the patient if it is determined that all of the one or more logical permits are satisfied, wherein the one or more logical permits include a first logical permit relating to expiration of the patient and wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, wherein expiration of the patient is deemed to be complete in response to analyzing patient flow over a breath, the method further comprising determining a volume throughout the breath, and wherein exhalation is deemed complete where a first portion of the volume associated with expiration matches a second portion of the volume associated with inspiration immediately preceding the first portion. 7. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied based on the data relating to respiratory activity of the patient; andproviding a machine breath to the patient if it is determined that all of the one or more logical permits are satisfied, wherein the one or more logical permits include a first logical permit relating to expiration of the patient and wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, wherein the timer is a conservative timer that is triggered when an inspiration to expiration transition is detected, and wherein the one or more logical permits include only the first logical permit; andsetting the timer to a timer value whenever an inspiration to expiration transition is detected, the timer value being the lesser of: (i) an average time of expiration of the patient multiplied by a constant, and (ii) a portion of a predetermined minimum breath period. 8. The method according to claim 7, wherein the constant is 1.66 and the portion is two-thirds. 9. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied based on the data relating to respiratory activity of the patient; andproviding a machine breath to the patient if it is determined that all of the one or more logical permits are satisfied, wherein the one or more logical permits include a first logical permit relating to expiration of the patient and wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, wherein the timer is an aggressive timer that is triggered when an expiration to inspiration transition is detected, and wherein the one or more logical permits are a plurality of logical permits; and setting the timer to a timer value whenever an expiration to inspiration transition is detected, the timer value being the lesser of: (i) an average breath period of the patient multiplied by a constant, and (ii) a predetermined minimum breath period. 10. The method according to claim 9, wherein the constant is 1.33. 11. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied based on the data relating to respiratory activity of the patient; andproviding a machine breath to the patient if it is determined that all of the one or more logical permits are satisfied, wherein the one or more logical permits include a first logical permit relating to expiration of the patient and wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, wherein the timer is an aggressive timer that is triggered when an expiration to inspiration transition is detected, and wherein the one or more logical permits are a plurality of logical permits, wherein the plurality of logical permits includes a second logical permit relating to a percent of timed breaths over a predetermined number of prior breaths, and wherein the second logical permit will be determined to be satisfied if the percent of timed breaths over the predetermined number of prior breaths is less than a predetermined amount. 12. The method according to claim 11, wherein the predetermined amount is 50%. 13. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied based on the data relating to respiratory activity of the patient; andproviding a machine breath to the patient if it is determined that all of the one or more logical permits are satisfied, wherein the one or more logical permits include a first logical permit relating to expiration of the patient and wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, wherein the timer is an aggressive timer that is triggered when an expiration to inspiration transition is detected, and wherein the one or more logical permits are a plurality of logical permits, wherein the plurality of logical permits includes a second logical permit relating to minute ventilation, and wherein the second logical permit will be determined to be satisfied if a short term minute ventilation measured over a first time period is less than a long term minute ventilation measured over a second time period longer than the first time period. 14. The method according to claim 9, wherein the plurality of logical permits includes a second logical permit relating to a standard deviation of prior breath periods over a predetermined period, and wherein the second logical permit will be determined to be satisfied if the standard deviation is less than a predetermined value. 15. A method of providing pressure support to a patient, comprising: monitoring data relating to respiratory activity of the patient;monitoring a timer;determining that the timer has expired;after determining the timer has expired, determining whether all of one or more logical permits are satisfied based on the data relating to respiratory activity of the patient; andproviding a machine breath to the patient if it is determined that all of the one or more logical permits are satisfied, wherein the one or more logical permits include a first logical permit relating to expiration of the patient and wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, wherein the timer is an aggressive timer that is triggered when an expiration to inspiration transition is detected, and wherein the one or more logical permits are a plurality of logical permits, wherein the plurality of logical permits includes a second logical permit that will be determined to be satisfied if a flag is set to TRUE, and wherein the flag is set to true when a timed breath is provided to the patient, and is set to FALSE only if three consecutive timed breaths are delivered to the patient. 16. The method according to claim 7, wherein the predetermined minimum breath period is determined based on a percentage of prior breaths triggered by the patient. 17. The method according to claim 9, wherein the predetermined minimum breath period is determined based on a percentage of prior breaths triggered by the patient. 18. A method of providing pressure support to a patient, comprising: monitoring a first timer, wherein the first timer is a conservative timer that is triggered when an inspiration to expiration transition is detected, the method further comprising setting the first timer to a first timer value whenever an inspiration to expiration transition is detected;determining whether the first timer has expired;if it is determined that the first timer has expired: (i) determining whether a first logical permit relating to expiration of the patient is satisfied, wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, and (ii) providing a machine breath to the patient if it is determined that the first timer has expired and that the first logical permit is satisfied;monitoring a second timer, wherein the second timer is an aggressive timer that is triggered when an expiration to inspiration transition is detected, the method further comprising setting the second timer to a second timer value whenever an expiration to inspiration transition is detected;determining whether the second timer has expired;if it is determined that the second timer has expired: (i) determining whether all of a plurality of logical permits are satisfied, wherein the plurality of logical permits include the first logical permit, and (ii) providing a machine breath to the patient if it is determined that the second timer has expired all of the plurality of logical permits are satisfied. 19. The method according to claim 17, wherein the first timer value is the lesser of: (i) an average time of expiration of the patient multiplied by a first constant, and (ii) a portion of a predetermined minimum breath period, and wherein the second timer value is the lesser of: (i) an average breath period of the patient multiplied by a second constant, and (ii) a predetermined minimum breath period. 20. The method according to claim 19, wherein the first constant is 1.66, the second constant is 1.33, and the portion is two-thirds. 21. A system of providing pressure support to a patient, comprising: first timing means for determining whether a first time period has expired, wherein the first timing means is a conservative timer that is triggered when an inspiration to expiration transition is detected, first timing means being set to a first timer value whenever an inspiration to expiration transition is detected;first permit means, responsive to a determination that the first time period has expired, for (a) determining whether a first logical permit relating to expiration of the patient is satisfied, wherein the first logical permit will be determined to be satisfied if expiration of the patient is deemed to be complete, and for (b) providing a machine breath to the patient responsive to determining that the first time period has expired and that the first logical permit is satisfied;second timing means for determining whether a second time period has expired, wherein the second timing means is an aggressive timer that is triggered when an expiration to inspiration transition is detected, the second timing means being set to a second timer value whenever an expiration to inspiration transition is detected;second permit means, responsive to a determination that the second time period has expired, for (a) determining whether all of a plurality of logical permits are satisfied, wherein the plurality of logical permits include the first logical permit, and for (b) providing a machine breath to the patient responsive to determining that the second time period has expired and that all of the plurality of logical permits are satisfied. 22. The system according to claim 21, wherein the first timer value is the lesser of: (i) an average time of expiration of the patient multiplied by a first constant, and (ii) a portion of a predetermined minimum breath period, and wherein the second timer value is the lesser of: (i) an average breath period of the patient multiplied by a second constant, and (ii) a predetermined minimum breath period. 23. The system according to claim 22, wherein the first constant is 1.66, the second constant is 1.33, and the portion is two-thirds.
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이 특허에 인용된 특허 (16)
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Sanders Mark H. (Pittsburgh PA) Zdrojkowski Ronald J. (Pittsburgh PA), Method and apparatus for maintaining airway patency to treat sleep apnea and other disorders.
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