MULTI-MODE INFLATABLE LIMB OCCLUSION DEVICE
First Claim
1. A multi-mode inflatable limb occlusion device comprising a controller configured to inflate a cuff placed about a limb of a subject to at least a limb occlusion pressure, whereby causing cessation of blood flow through the limb, said controller is configured to operate in at least two of the following three modes of operation:
- a remote conditioning mode of operation, wherein said controller is configured to inflate and deflate the cuff according to a remote conditioning treatment protocol, said treatment protocol including a plurality of treatment cycles, each treatment cycle comprising;
a period of cuff inflation, during which the cuff is inflated and maintained at a pressure at or above said limb occlusion pressure for at least about one minute, anda period of cuff deflation, during which the cuff is deflated below the limb occlusion pressure, whereby at least partially restoring blood flow through the limb,a tourniquet mode of operation, wherein said controller is configured to inflate the cuff to at least said limb occlusion pressure for a predetermined or manually set period of cuff inflation lasting at least one minute, anda blood pressure monitoring mode of operation, wherein said controller is configured to detect blood pressure of the subject.
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Accused Products
Abstract
Methods for adaptive cuff inflation for the purposes of occluding a limb of a subject include inflating a cuff to a pressure at or above limb occlusion pressure and periodically deflating the cuff to detect amplitude of oscillometric oscillations reaching or exceeding a predetermined threshold, whereby indicating that the cuff pressure has reached an updated systolic blood pressure. Selecting the cuff to be wide enough to define limb occlusion pressure at or below the systolic blood pressure assures that this maneuver does not compromise cessation of blood flow to the limb. Devices are disclosed configured to operate in at least two of the following three operating modes: a tourniquet mode, a remote conditioning mode and a blood pressure monitoring mode.
20 Citations
20 Claims
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1. A multi-mode inflatable limb occlusion device comprising a controller configured to inflate a cuff placed about a limb of a subject to at least a limb occlusion pressure, whereby causing cessation of blood flow through the limb, said controller is configured to operate in at least two of the following three modes of operation:
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a remote conditioning mode of operation, wherein said controller is configured to inflate and deflate the cuff according to a remote conditioning treatment protocol, said treatment protocol including a plurality of treatment cycles, each treatment cycle comprising; a period of cuff inflation, during which the cuff is inflated and maintained at a pressure at or above said limb occlusion pressure for at least about one minute, and a period of cuff deflation, during which the cuff is deflated below the limb occlusion pressure, whereby at least partially restoring blood flow through the limb, a tourniquet mode of operation, wherein said controller is configured to inflate the cuff to at least said limb occlusion pressure for a predetermined or manually set period of cuff inflation lasting at least one minute, and a blood pressure monitoring mode of operation, wherein said controller is configured to detect blood pressure of the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multi-mode inflatable limb occlusion device comprising a controller configured to deliver remote conditioning by periodically:
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inflating a first cuff sized to fit about a first limb of a subject to a pressure at or above a limb occlusion pressure of the subject and maintaining the first cuff at or above said limb occlusion pressure for at least one minute, whereby causing cessation of blood flow through the first limb; deflating the first cuff to at least partially restore blood flow through the first limb; said controller is further configured during or after completion of remote conditioning to inflate and maintain the first cuff or a second cuff in a tourniquet mode of operation to at least said limb occlusion pressure, said second cuff sized to fit about a second limb of the subject, said tourniquet mode lasting for a predetermined or manually set period of cuff inflation of at least one minute, whereby inflation of the first cuff or the second cuff causing cessation of blood flow to respectively the first limb or the second limb of the subject. - View Dependent Claims (12, 13)
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14. A comprehensive monitor of physiologic parameters of a subject including at least blood pressure monitoring and automatic delivery of remote conditioning, the monitor comprising a cuff sized to fit about a limb of the subject and a controller connected to the cuff and configured to monitor the blood pressure before, during, or after delivery of remote conditioning, said remote conditioning is delivered by said controller by periodically:
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inflating the cuff to a pressure at or above a limb occlusion pressure of the subject defining an inflated state and maintaining the cuff in the inflated state for at least one minute, and deflating the cuff to restore blood flow to the limb. - View Dependent Claims (15)
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16. A method for adaptive limb occlusion of a subject, the method comprising the steps of:
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(a) providing a cuff sized to be placed about a limb of the subject, said cuff is configured to define a limb occlusion pressure to be equal to or below a systolic blood pressure of the subject; (b) determining the systolic blood pressure of a subject by inflating the cuff placed about the limb of the subject; (c) inflating the cuff to a pressure sufficient to cause cessation of blood flow through the limb, said pressure being below, at or above the systolic blood pressure calculated in step (b) for a period of cuff inflation, said period of cuff inflation lasting at least about one minute; (d) at least once during the period of cuff inflation, decreasing cuff pressure sufficiently to determine an updated systolic blood pressure of the subject but without compromising cessation of blood flow through the limb; and (e) inflating the cuff to a pressure below, at or above the updated systolic blood pressure calculated in step (d), said pressure being sufficient to continue causing cessation of blood flow through the limb. - View Dependent Claims (17, 18, 19, 20)
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Specification