Portable patient temperature adjustment apparatus and method
First Claim
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1. A device comprising:
- a pressure chamber that includes a seal element and a casing, the casing defining a pressure controlled environment and being configured to expand open to facilitate installation of a limb of a patient in the casing, the pressure chamber comprising an elastic shell fitted about an exterior surface of the casing that is configured to bias the casing closed during operation of the pressure chamber yet stretch to allow for expansion of the casing to facilitate insertion or removal of the limb from the casing, the seal element configured to seal the pressure chamber about the limb; and
a control unit connectable to the pressure chamber and adapted, when connected to the pressure chamber, to alternatingly introduce a negative pressure to the pressure chamber during a negative pressure period and release the negative pressure from the pressure chamber to restore the pressure chamber to approximately atmospheric pressure during an atmospheric pressure period.
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Abstract
Embodiments of the invention provide devices and methods for the in situ or in transit adjustment of the core body temperature of a patient. Devices according to some embodiments include a control unit and pressure chamber adapted to apply a pulsating negative pressure to a limb of the patient. An adjustment temperature applied during the application of the pulsating pressure can heat or cool the patient as necessary. Devices and methods disclosed herein can provide for efficient heating and/or cooling of a patient. In addition, devices and methods provide such functionality in a portable device that can be manually carried by an individual.
49 Citations
31 Claims
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1. A device comprising:
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a pressure chamber that includes a seal element and a casing, the casing defining a pressure controlled environment and being configured to expand open to facilitate installation of a limb of a patient in the casing, the pressure chamber comprising an elastic shell fitted about an exterior surface of the casing that is configured to bias the casing closed during operation of the pressure chamber yet stretch to allow for expansion of the casing to facilitate insertion or removal of the limb from the casing, the seal element configured to seal the pressure chamber about the limb; and a control unit connectable to the pressure chamber and adapted, when connected to the pressure chamber, to alternatingly introduce a negative pressure to the pressure chamber during a negative pressure period and release the negative pressure from the pressure chamber to restore the pressure chamber to approximately atmospheric pressure during an atmospheric pressure period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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providing a pressure chamber that includes a seal element and a casing, the casing defining a pressure control led environment and being configured to expand open to facilitate installation of a limb of a patient in the casing, the pressure chamber comprising an elastic shell fitted about an exterior surface of the casing that is configured to bias the casing closed during operation of the pressure chamber yet stretch to allow for expansion of the casing to facilitate insertion or removal of the limb from the casing, the seal element configured to seal the pressure chamber about the limb; inserting the limb of the patient in the pressure chamber by at least expanding the casing open, installing the limb in the casing, and biasing the casing closed so as to seal the limb from external conditions; and increasing blood flow to an area of skin of the limb within the pressure chamber by at least (i) generating a negative pressure within the pressure chamber for a first time interval and (ii) releasing the negative pressure within the pressure chamber for a second time interval that is different than the first time interval. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification