IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0090707
(2006-10-23)
|
등록번호 |
US-8647374
(2014-02-11)
|
국제출원번호 |
PCT/US2006/041278
(2006-10-23)
|
§371/§102 date |
20081117
(20081117)
|
국제공개번호 |
WO2007/089293
(2007-08-09)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Cincinnati Sub-Zero Products, Inc.
|
대리인 / 주소 |
Wood, Herron & Evans, LLP
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
24 |
초록
▼
A patient temperature control system (10) uses variable temperature gradient warming/cooling in combination with a warming/cooling device (16), such as a blanket, to increase efficiency in driving a patient's temperature to a desired setpoint, with reduced occurrence of and magnitude of overshoot co
A patient temperature control system (10) uses variable temperature gradient warming/cooling in combination with a warming/cooling device (16), such as a blanket, to increase efficiency in driving a patient's temperature to a desired setpoint, with reduced occurrence of and magnitude of overshoot conditions. In operation, the controller (26) of the system (10) senses the temperature of a patient (12) via a sensor (31), for comparison to a temperature of the circulating water, sensed via sensor (30). If the patient temperature is not sufficiently close to a setpoint temperature, the system (10) is operable to warm/cool the circulating water to a temperature which differs from the patient's temperature by a temperature gradient of 10 ° C., or some other preselected initial temperature gradient. After a subsequent time interval, if the patient temperature has not moved sufficiently close to the setpoint temperature, the controller (26) incrementally raises or lowers the temperature of the circulating water, to intensify the a warming/cooling effect. This procedure repeats at desired intervals, to more efficiently reach the setpoint temperature. Thus, the system (10) is capable of automatically increasing or decreasing the temperature gradient, dependent upon subsequently sensed patient temperatures.
대표청구항
▼
1. A patient temperature control system comprising: a) a fluid circuit for conveying warming/cooling fluid to a patient warming/cooling device, the patient warming/cooling device capable of being non-invasively applied to a patient for conductive warming/cooling of the patient according to a hypo-hy
1. A patient temperature control system comprising: a) a fluid circuit for conveying warming/cooling fluid to a patient warming/cooling device, the patient warming/cooling device capable of being non-invasively applied to a patient for conductive warming/cooling of the patient according to a hypo-hyperthermia treatment;b) a controller operatively connected to the fluid circuit to control the flow and the temperature of the warming/cooling fluid there through;c) a first temperature sensor adapted to sense the temperature of the patient and operatively connected to the controller;d) a second temperature sensor adapted to sense the temperature of the warming/cooling fluid and operatively connected to the controller;e) the controller adapted to warm the warming/cooling fluid being conveyed to the warming/cooling device, thereby to conductively warm the patient in a non-invasive manner when the first sensor senses a patient temperature lower than a selected target temperature;f) the controller also operative to cool the warming/cooling fluid being conveyed to the warming/cooling device, thereby to conductively cool the patient in a non-invasive manner when the first sensor senses a patient temperature higher than the selected target temperature;g) wherein the controller automatically controls the warming or cooling of the warming/cooling fluid during an initial stage, at a temperature that differs from the sensed patient temperature by, at a maximum, a predetermined initial stage temperature gradient; andh) the controller, during a subsequent stage, automatically controls the warming or cooling of the warming/cooling fluid by automatically varying the magnitude of the temperature gradient from the predetermined initial stage temperature gradient toward a subsequent temperature gradient, in response to a subsequently sensed temperature of the patient as sensed via the first sensor, if the sensed patient temperature has not moved sufficiently close to the selected target temperature, thereby to more quickly bring the temperature of the patient to the selected target temperature and to do so in a manner which minimizes overshoot, and wherein the controller does not automatically vary the magnitude of the temperature gradient from the predetermined initial stage temperature gradient if the sensed patient temperature has moved sufficiently close to the selected target temperature. 2. The patient temperature control system of claim 1 wherein the controller causes the subsequent variations in the magnitude of the temperature gradient to occur at specified time intervals. 3. The patient temperature control system of claim 2 wherein the duration of the specified time intervals is selectable. 4. The patient temperature control system of claim 2 wherein the durations of the subsequent specified time intervals remain the same. 5. The patient temperature control system of claim 1 wherein the controller is configured to enable a user to select the magnitude of the predetermined initial stage temperature gradient, from a plurality of predetermined initial stage temperature gradient options. 6. The patient temperature control system of claim 1 wherein the controller is configured such that each of the subsequent variations in the magnitude of the temperature gradient, which result from the subsequently sensed patient temperatures, is at a fixed temperature increment. 7. The patient temperature control system of claim 6 wherein the fixed increment for the subsequent variations in the temperature gradients is about 5° C. 8. The patient temperature control system of claim 1 wherein the patient warming/cooling device is a blanket and the fluid is water. 9. A method of controlling the temperature of a patient using a patient temperature control system, the method comprising conductively warming/cooling the patient in a non-invasive manner via warmed/cooled fluid that flows through a device located near the patient, the warming/cooling fluid being warmed/cooled at a temperature which, at a maximum, differs from the patient's first sensed temperature by a predetermined temperature magnitude; andthereafter, automatically varying said predetermined temperature magnitude if the subsequently sensed patient temperature has not moved sufficiently close to a selected setpoint temperature within a given time window, but maintaining the predetermined temperature magnitude if the subsequently sensed patient temperature has moved sufficiently close to the selected setpoint temperature within the given time window. 10. The method of claim 9 wherein the duration of the given time is selectable. 11. A patient temperature control system comprising: a blanket;a controller operatively connected to the blanket for, in a mode of automatic control, conductively warming/cooling a patient in a non-invasive manner via warming/cooling fluid conveyed through the blanket, wherein the warming/cooling fluid is warmed/cooled at a temperature which is based on an initial predeteimined temperature differential relative to the patient's sensed temperature, said initial predetermined temperature differential being user-selectable such that one of at least three different initial predetermined temperature differentials may be selected, andwherein the controller automatically varies the temperature differential from said initial, user selectable predetermined temperature differential toward a subsequent temperature differential, dependent on the patient's subsequently sensed temperature, if the patient's subsequently sensed temperature has not moved sufficiently close to a selected setpoint temperature within a given time window, but wherein the controller maintains the same temperature differential if the patient's subsequently sensed temperature has moved sufficiently close to the selected setpoint temperature.
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