LOW-NOISE OPTICAL PROBES FOR REDUCING AMBIENT NOISE
First Claim
Patent Images
1. A disposable optical probe comprising:
- a light source;
a detector configured to detect light from said light source after attenuation by patient tissue;
a conductive detector shield, the detector shield surrounding the detector without covering at least a portion of a face of the detector so that light from the light source is allowed to reach the detector for detection, the conductive detector shield configured to reduce an effect of electromagnetic noise on said detector;
a base material layer;
a face material layer, the face material and the base material cooperating to sandwich and hold the light source, the detector and the conductive detector shield;
an ambient light noise blocking element configured to block ambient light noise from the detector, the ambient light noise blocking element cooperating with at least one of the base and face material layers; and
a disposable flexible attachment mechanism comprising a soft spongy wrap configured to wrap the measurement site.
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Abstract
An optical probe, which is particularly suited to reduce noise in measurements taken on an easily compressible material, such as a finger, a toe, a forehead, an earlobe, or a lip, measures characteristics of the material. A neonatal and adult disposable embodiment of the probe include adhesive coated surfaces to securely affix the probe onto the patient. In addition, the surface of the probe is specially constructed to reduce the effect of ambient noise.
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Citations
20 Claims
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1. A disposable optical probe comprising:
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a light source; a detector configured to detect light from said light source after attenuation by patient tissue; a conductive detector shield, the detector shield surrounding the detector without covering at least a portion of a face of the detector so that light from the light source is allowed to reach the detector for detection, the conductive detector shield configured to reduce an effect of electromagnetic noise on said detector; a base material layer; a face material layer, the face material and the base material cooperating to sandwich and hold the light source, the detector and the conductive detector shield; an ambient light noise blocking element configured to block ambient light noise from the detector, the ambient light noise blocking element cooperating with at least one of the base and face material layers; and a disposable flexible attachment mechanism comprising a soft spongy wrap configured to wrap the measurement site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of providing ambient light shielding to a disposable optical probe, the method comprising:
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providing a light source; providing a detector configured to detect light from said light source after attenuation by patient tissue; providing a base material layer; providing a face material layer; providing an ambient light noise blocking layer configured to block ambient light noise from the detector; providing a disposable flexible attachment mechanism comprising a soft spongy wrap configured to wrap around the measurement site; wrapping the detector with a conductive detector shield, the detector shield surrounding the detector without covering at least a portion of a face of the detector so that light is allowed to reach the detector for detection, the conductive detector shield configured to reduce an effect of electromagnetic noise on said detector; sandwiching the at least one emitter and the detector wrapped in the conductive detector shield between the face material layer and the base material layer; affixing the ambient light noise blocking layer to the base material layer; and affixing the disposable flexible attachment mechanism to the sandwiched at least one emitter and detector to form a disposable optical probe. - View Dependent Claims (12, 13, 14, 15)
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16. A disposable optical probe comprising:
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a light source; a Faraday-shielded detector configured to detect light from said light source after attenuation by patient tissue; an ambient light blocking element configured to reduce ambient light exposure at least around the detector; and a wrap configured to removably position the light source, the Faraday-shielded detector and the ambient light blocking element with respect to the patient tissue, the wrap including a central axis extending to a cable attachment on a distal end of the axis and wrapping around the tip of the finger along the central axis and at least one wing configured to wrap around the circumference of the finger. - View Dependent Claims (17, 18, 19, 20)
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Specification