METHOD AND SYSTEM FOR ASSESSING SEVERITY AND STAGE OF PERIPHERAL ARTERIAL DISEASE AND LOWER EXTREMITY WOUNDS USING ANGIOSOME MAPPING
First Claim
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1. An angiosome-based system for monitoring and assessing lower extremity disease comprising:
- a compression device sized and shaped for placement on a lower extremity limb of a patient, the compression device including a pressure cuff configured to exert a compressive force on said lower extremity limb, the compressive force configured to substantially occlude blood flow in a skin capillary bed adjacent said pressure cuff, said skin capillary bed located in a lower extremity angiosome;
at least one sensor positioned adjacent said pressure cuff, said at least one sensor for measuring peripheral vascular conditions of the patient in the skin capillary bed and configured to generate a signal indicative of the peripheral vascular condition;
a processing device in operable communication with said at least one sensor, said processing device configured to (a) output a visual representation of said lower extremity angiosome, said visual representation to guide the placement of said sensor in the mapping of a testing site relative to said skin capillary bed;
(b) receive a peripheral vascular measurement based on said angiosome mapping; and
(c) output data that is indicative of lower extremity disease based on said angiosome mapping.
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Abstract
The present invention provides a system for assessing the severity and stage of PAD including at least one sensor that measures skin perfusion pressure; a knowledge base that provides data on lower extremity angiosomes; and a processing device in operable communication with the sensor and the knowledge base, the processing device that outputs a visual representation of at least one of the lower extremity angiosomes that guides the sensor in the mapping of a testing site relative to a target vessel where the skin perfusion pressure measurement will be taken.
28 Citations
18 Claims
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1. An angiosome-based system for monitoring and assessing lower extremity disease comprising:
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a compression device sized and shaped for placement on a lower extremity limb of a patient, the compression device including a pressure cuff configured to exert a compressive force on said lower extremity limb, the compressive force configured to substantially occlude blood flow in a skin capillary bed adjacent said pressure cuff, said skin capillary bed located in a lower extremity angiosome; at least one sensor positioned adjacent said pressure cuff, said at least one sensor for measuring peripheral vascular conditions of the patient in the skin capillary bed and configured to generate a signal indicative of the peripheral vascular condition; a processing device in operable communication with said at least one sensor, said processing device configured to (a) output a visual representation of said lower extremity angiosome, said visual representation to guide the placement of said sensor in the mapping of a testing site relative to said skin capillary bed;
(b) receive a peripheral vascular measurement based on said angiosome mapping; and
(c) output data that is indicative of lower extremity disease based on said angiosome mapping. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An angiosome-based perfusion monitoring system for peripheral artery disease, the monitoring system comprising:
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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 (i) pressurize at least one bladder 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 at least one bladder, (ii) depressurize the at least one bladder at a controlled rate after pressurizing the bladder, (iii) receive a sensor signal from at least one perfusion sensor on the compression device during depressurization of the at least one bladder, wherein the sensor signal is indicative of perfusion parameters of at least one skin capillary bed adjacent said at least one perfusion sensor for quantifying skin capillary bed perfusion, and (iv) map sensor signals from said at least one perfusion sensor to at least one of a first angiosome and at least one artery of the limb to determine whether the received sensor signal is indicative of peripheral artery disease. - View Dependent Claims (11, 12, 13, 14)
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15. A method of monitoring for peripheral artery disease, the method comprising:
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pressurizing a bladder 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 bladder of the compression device; depressurizing the bladder at a controlled rate after said pressurizing the bladder; detecting, during said depressurizing the bladder and using at least one sensor, a perfusion parameter of a skin capillary bed located in at least one angiosome of the limb; generating a sensor signal indicative of the perfusion parameter detected by said at least one sensor; receiving, by a control circuit, said at least one sensor signal; mapping, by the control circuit, said at least one 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 said angiosome; anddetermining, by the control circuit, whether the first and second sensor signals are indicative of peripheral artery disease. - View Dependent Claims (16, 17, 18)
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Specification