Low noise finger cot probe
First Claim
1. A sensor for analyzing human tissue, said sensor having a body and comprising:
- a first end of said body at which to receive some of the tissue to be analyzed;
a flexible opposite end of said body rolled up upon itself in a direction towards and spaced a first distance from said first end, said opposite end moved in a direction away from said first end to unroll said opposite end so as to surround said tissue, the unrolled end being spaced a substantially greater distance from said first end than the first distance between said rolled end and said first end;
electromagnetic energy source means carried by said first end to emit electromagnetic energy towards the tissue to be analyzed; and
electromagnetic energy detector means carried by said first end and arranged relative to said source means to receive the electromagnetic energy emitted by said source means, the magnitude of the electromagnetic energy received by said detector means providing information regarding said tissue.
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Accused Products
Abstract
A low cost, disposable oximetric sensor including a finger cot probe to facilitate either the transillumination or transreflectance and the detection of optical energy emitted towards a patient'"'"'s finger without subjecting the finger to deformation. The finger is received within a receptacle having a cup-shaped closed end and an opposite open end that is rolled up upon itself and adapted to be unrolled longitudinally along the finger to form a tubular enclosure in surrounding engagement with the finger. An optical source and an optical detector are arranged in spaced axial alignment with one another at opposite sides of the finger so that optical energy transmitted by the source towards the finger is received by the detector for non-invasively indicating the saturation of oxygen within the patient'"'"'s blood depending upon the magnitude of the optical energy detected. By virtue of the present invention, decoupling the optical path between the source and detector is minimized in the event that the patient moves his finger during testing.
1107 Citations
21 Claims
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1. A sensor for analyzing human tissue, said sensor having a body and comprising:
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a first end of said body at which to receive some of the tissue to be analyzed; a flexible opposite end of said body rolled up upon itself in a direction towards and spaced a first distance from said first end, said opposite end moved in a direction away from said first end to unroll said opposite end so as to surround said tissue, the unrolled end being spaced a substantially greater distance from said first end than the first distance between said rolled end and said first end; electromagnetic energy source means carried by said first end to emit electromagnetic energy towards the tissue to be analyzed; and electromagnetic energy detector means carried by said first end and arranged relative to said source means to receive the electromagnetic energy emitted by said source means, the magnitude of the electromagnetic energy received by said detector means providing information regarding said tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for analyzing human tissue, said apparatus comprising:
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flexible carrier means for engaging the human tissue to be analyzed at one side of said carrier means, said carrier means including electromagnetic energy source means to emit electromagnetic energy towards said tissue and electromagnetic energy detector means to detect the energy emitted by said electromagnetic energy source means; and tissue receptacle means having a first end attached at a side of said carrier means opposite the one side thereof engaging said tissue and a flexible opposite end rolled up upon itself and adapted to be unrolled over said first end in a direction towards said carrier means so as to surround the tissue to be analyzed and simultaneously move said carrier means around said tissue such that said detector means is arranged relative to said source means to receive the electromagnetic energy emitted by said source means, the magnitude of the electromagnetic energy received by said detector means providing information regarding said tissue. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method for analyzing human tissue by means of a tissue receptacle having a first closed end and an opposite open end that is rolled up upon itself such that said first closed end and said opposite rolled up end are spaced a first distance from one another, said method comprising the steps of:
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unrolling the rolled up open end of said receptacle away from said final end so as to form a tubular enclosure with said closed first end for surrounding said tissue, the length of said tubular enclosure between said unrolled open end and said closed first end being substantially greater than the first distance between said rolled up open end and said closed end; locating a source of electromagnetic energy at one side of said tissue to be analyzed to transmit electromagnetic energy towards said tissue; locating a detector of electromagnetic energy at the opposite side of the tissue to be analyzed to receive the electromagnetic energy transmitted by said source; and computing the magnitude of the electromagnetic energy received by said detector from said source for providing information regarding said tissue.
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Specification