Angiosome-based perfusion monitoring system
First Claim
1. An angiosome-based perfusion monitoring system for peripheral artery disease, the monitoring system comprising:
- a compression device sized and shaped for placement on a limb of a subject, the compression device including;
a plurality of pressurizable bladders configured to exert a suitable compressive force on the limb of the subject when pressurized to substantially occlude blood flow into skin capillary beds adjacent to the plurality of pressurizable bladders, anda plurality of spaced apart perfusion sensors, wherein each sensor of the plurality of perfusion sensors is located generally adjacent at least one bladder of the plurality of pressurizable bladders, each perfusion sensor configured to detect a perfusion parameter of skin capillary beds adjacent the perfusion sensor for quantifying skin capillary bed perfusion and generate a signal indicative of the perfusion parameter,wherein at least one sensor of the plurality of perfusion sensors is a first-angiosome sensor for detecting the perfusion parameter of a skin capillary bed in a first angiosome of the limb and at least one sensor of the plurality of perfusion sensors is a second-angiosome sensor for detecting the perfusion parameter of a skin capillary bed in a second angiosome of the limb that is different from the first angiosome, the first-angiosome sensor located generally adjacent a first bladder of the plurality of pressurizable bladders and the second-angiosome sensor located generally adjacent a second bladder of the plurality of pressurizable bladders that is different from the first bladder.
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Accused Products
Abstract
A compression device includes at least one pressurizable bladder to substantially occlude blood flow into skin capillary beds adjacent to the at least one pressurizable bladder, and a plurality of perfusion sensors. In operation a first-angiosome sensor detects the perfusion parameter of a skin capillary bed in a first angiosome of the limb, and a second-angiosome sensor detects the perfusion parameter of a skin capillary bed in a second angiosome of the limb that is different from the first angiosome. A control circuit maps sensor signals from the first-angiosome sensor to the first angiosome or a first artery of the limb, and maps sensor signals from the second-angiosome sensor to the second angiosome or a second artery of the limb different from the first artery of the limb. For each perfusion sensor, the control circuit determines whether the received sensor signals are indicative of peripheral artery disease.
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Citations
27 Claims
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1. An angiosome-based perfusion monitoring system for peripheral artery disease, the monitoring system comprising:
a compression device sized and shaped for placement on a limb of a subject, the compression device including; a plurality of pressurizable bladders configured to exert a suitable compressive force on the limb of the subject when pressurized to substantially occlude blood flow into skin capillary beds adjacent to the plurality of pressurizable bladders, and a plurality of spaced apart perfusion sensors, wherein each sensor of the plurality of perfusion sensors is located generally adjacent at least one bladder of the plurality of pressurizable bladders, each perfusion sensor configured to detect a perfusion parameter of skin capillary beds adjacent the perfusion sensor for quantifying skin capillary bed perfusion and generate a signal indicative of the perfusion parameter, wherein at least one sensor of the plurality of perfusion sensors is a first-angiosome sensor for detecting the perfusion parameter of a skin capillary bed in a first angiosome of the limb and at least one sensor of the plurality of perfusion sensors is a second-angiosome sensor for detecting the perfusion parameter of a skin capillary bed in a second angiosome of the limb that is different from the first angiosome, the first-angiosome sensor located generally adjacent a first bladder of the plurality of pressurizable bladders and the second-angiosome sensor located generally adjacent a second bladder of the plurality of pressurizable bladders that is different from the first bladder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An angiosome-based perfusion monitoring system for peripheral artery disease, the monitoring system comprising:
a control device including; a source of pressurized fluid for introducing into a compression device that is placed on a limb of a subject; and a control circuit configured to; pressurize a first bladder of a plurality of pressurizable bladders of a compression device when the compression device is placed on a limb of a subject to substantially occlude blood perfusion in skin capillary beds adjacent to the first bladder, and depressurize the first bladder at a first controlled rate after pressurizing the first bladder, pressurize a second bladder of the plurality of pressurizable bladders when the compression device is placed on the limb of the subject to substantially occlude blood perfusion in skin capillary beds adjacent to the second bladder, the second bladder being different from the first bladder, and depressurize the second bladder at a second controlled rate after pressurizing the second bladder, receive separate sensor signals from a plurality of perfusion sensors of the compression device during respective depressurization of the first bladder and the second bladder, wherein each sensor of the plurality of perfusion sensors is located generally adjacent at least one bladder of the plurality of pressurizable bladders, and wherein the sensor signals are indicative of perfusion parameters of skin capillary beds adjacent the perfusion sensors for quantifying skin capillary bed perfusion, map sensor signals from a first sensor of the plurality of perfusion sensors to at least one of a first angiosome or a first artery of the limb, the first sensor located generally adjacent the first bladder, map sensor signals from a second sensor of the plurality of perfusion sensors to at least one of a second angiosome or a second artery of the limb, the second sensor located generally adjacent the second bladder, wherein the second angiosome and second artery are different from the first angiosome and the first artery, respectively, and determine, for each perfusion sensor, whether the received sensor signals are indicative of peripheral artery disease. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of monitoring for peripheral artery disease, the method comprising:
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pressurizing a first bladder of a plurality of pressurizable bladders of a compression device that is placed on a limb of a wearer so as to substantially occlude blood perfusion to skin capillary beds adjacent the first bladder; depressurizing the first bladder at a first controlled rate after pressurizing the first bladder; pressurizing a second bladder of the plurality of pressurizable bladders of the compression device that is placed on the limb of the wearer so as to substantially occlude blood perfusion to skin capillary beds adjacent the second bladder, the second bladder being different from the first bladder; depressurizing the second bladder at a second controlled rate after pressurizing the second bladder; detecting, during the depressurizing of the first bladder and using a first perfusion sensor of the compression device, a perfusion parameter of a skin capillary bed located in a first angiosome of the limb, the first perfusion sensor being located generally adjacent the first bladder; generating a first sensor signal indicative of the perfusion parameter detected by the first perfusion sensor; detecting, during the depressurizing of the second bladder and using a second perfusion sensor of the compression device, a perfusion parameter of a skin capillary bed located in a second angiosome of the limb that is different from the first angiosome of the limb, the second perfusion sensor being located generally adjacent the second bladder; generating a second sensor signal indicative of the perfusion parameter detected by the second perfusion sensor; receiving, by a control circuit, the first and second sensor signals; mapping, by the control circuit, the first sensor signal to at least one of the first angiosome and a first artery associated with the first angiosome; mapping, by the control circuit, the second sensor signal at least one of the second angiosome and a second artery associated with the second angiosome; and determining, by the control circuit, whether the first and second sensor signals are indicative of peripheral artery disease. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification