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Blanching response pressure sore detector apparatus and method

  • US 20040054303A1
  • Filed: 07/29/2002
  • Published: 03/18/2004
  • Est. Priority Date: 07/29/2002
  • Status: Active Grant
First Claim
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1. An apparatus for detecting pressure sores on humans, said apparatus comprising;

  • a. a light source, b. a first, leading photodetector spaced apart at a first radial distance from said light source, c. a second, trailing photodetector spaced apart at a second radial distance from said light source, d. difference signal amplifier means operatively connected to output terminals of said leading and t railing photodetectors, said amplifier means providing a first type indicator signal output if said leading photodetector outputs a signal greater by a first threshold value than an output signal from said trailing photodetector, and a second type indicator signal output if said trailing photodetector outputs a signal which exceeds by a second predetermined threshold value an output signal from said leading photodetector, e. a transparent window transmissive to radiation from said light source located on a first, front side of said light source and said leading and trailing photodetectors, said window having a front surface pressable against the skin of a human and thereby cause said skin to blanch, said window being arranged to allow incident radiation from said light source to impinge on said skin, and to allow radiation reflected from said skin to impinge said photodetectors, and f. indicator means connected to said amplifier means and providing a first type indicator response to said first type amplifier signal output, and a second type indicator response to said second type amplifier signal output.

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