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Method and instrument for automated measurement of skin perfusion pressure

a technology automated measurement, which is applied in the field of instruments for the automated measurement can solve the problems of skin perfusion pressure reading, motion artifact, and heavy dependence on reproducible measurements

Inactive Publication Date: 2006-03-16
OPTICAL SENSORS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0011] Accordingly it is an object of the present invention to overcome the problems and disadvantages of the surface perfusion pressure instruments of the prior art. It is, therefore, an object of the present invention to automate the measurement of skin perfusion pressure and generate an SPP value.
[0015] It is a further object of the invention to provide a skin perfusion pressure monitoring system that actively controls the rate of cuff deflation.

Problems solved by technology

Therefore, a significant problem with the use of skin perfusion pressure instruments described by Borgos et al. is that reliable, reproducible measurements are heavily dependent on operator / technician skill and the skill of the physician who interprets the surface perfusion pressure measurement.
Another problem associated with manual deflation is that it is sensitive to motion artifact caused by the operator or patient (e.g. patient movement, pressure tubing movement, or sensor movement).
In addition, motion artifact may result from patient movement, involuntary muscular movement, operator intervention, and other causes affecting the reading of skin perfusion pressure.

Method used

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  • Method and instrument for automated measurement of skin perfusion pressure
  • Method and instrument for automated measurement of skin perfusion pressure
  • Method and instrument for automated measurement of skin perfusion pressure

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Embodiment Construction

[0035] Before the inventive devices and methods are disclosed and described, it is to be understood that certain terminology is used to describe the invention but different aspects of it may vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0036] It must be noted that, as used in the specification and the appended claims, the singular forms “a,”“an,” and “the” include plural referents unless the context clearly dictates otherwise.

[0037] The term “adequate perfusion” means the perfusion criteria used to continue the cuff inflation sequence. This criterion ensures that there is proper contact between the probe and the patient's skin. It is typically perfusion that is greater than 0.1%.

[0038] The term “no flow” means the perfusion criteria at which cuff deflation is initiated and is approximately less than 0.1%.

[0039] The term “baseline flow” means the flow between the ...

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Abstract

An automatic skin perfusion measuring device automatically analyzes perfusion measurements to identify motion artifact and SPP values. Motion artifact is ignored. Perfusion measurements are designated as SPP values if various criteria are met. SPP value criteria pertain to factors including cuff pressure, perfusion, perfusion change percentages relative to previous and subsequent perfusion measurements, and whether perfusion measurements are increasing or decreasing relative to previous and subsequent perfusion measurements.

Description

[0001] This application claims the benefit under 35 USC 119(e) of U.S. Patent Application No. 60 / 609,175, filed Sep. 10, 2004, the entirety of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an instrument for the automated measurement of skin perfusion pressure of a local or regional body site. More particularly the invention relates to an instrument for the automated measurement of skin perfusion pressure that detects and rejects motion artifact. [0004] 2. Description of the Related Art [0005] Skin perfusion pressure measurements are taken to determine whether local blood flow, i.e. capillary perfusion, of a local or regional body site having an ulcer or wound is sufficient to support wound healing. The accurate measurement of this parameter, therefore, is critical to physicians who treat patients suffering from open surface wounds resulting from complications from diabetes, pressure ulce...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B5/02
CPCA61B5/0048A61B5/7207A61B5/0261A61B5/0295A61B5/0053
Inventor BARTNIK, DANIEL J.REYNOLDS, BRANDON W.
Owner OPTICAL SENSORS
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