Method and apparatus for analyte detection using intradermally implanted skin port
First Claim
1. An apparatus for facilitating measurement of analyte concentration comprising:
- a housing;
an optical window in the housing, the housing having a through portion downstream of the optical window in a path of optical radiation supplied to the window;
an optical output portion, downstream of the through portion in the path of optical radiation, which outputs optical radiation transmitted by a sample in the through portion to an analysis unit; and
a transcutaneous access device adapted for securing the housing to a subject, wherein the housing is at a predetermined location relative to the transcutaneous access device.
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Abstract
A transcutaneous, implantable skin port sensor includes an access component and a sensor component, both of which can be made from inexpensive biocompatible materials. The access component provides a biological seal that forms around the skin port sensor. The sensor component facilitates non-invasive optically based measurement of analytes by providing a window to the body which avoids changes in the optical signal due to variations in skin optics, optical pathlength, ambient temperature and probe pressure. Tissue ingrowth or interstitial fluid in a through portion downstream of the optical window serves as the sample for the non-invasive, optically based measurement.
91 Citations
26 Claims
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1. An apparatus for facilitating measurement of analyte concentration comprising:
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a housing;
an optical window in the housing, the housing having a through portion downstream of the optical window in a path of optical radiation supplied to the window;
an optical output portion, downstream of the through portion in the path of optical radiation, which outputs optical radiation transmitted by a sample in the through portion to an analysis unit; and
a transcutaneous access device adapted for securing the housing to a subject, wherein the housing is at a predetermined location relative to the transcutaneous access device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for measuring analyte concentration comprising:
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a housing;
an optical window in the housing, the housing having a through portion downstream of the optical window in the path of optical radiation supplied to the windowan optical output portion, downstream of the through portion in the path of optical radiation, which outputs optical radiation transmitted by a sample in the through portion;
a transcutaneous access device, adapted to be anchored to subcutaneous tissue of a patient, holding the housing at a predetermined location relative to the transcutaneous access device;
an optical source for supplying optical radiation to the optical window; and
a delivery system for supplying the optical radiation output by the optical output portion to instrumentation for analysis of analyte concentration.- View Dependent Claims (14, 15, 16, 17)
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18. A method of obtaining optical data for use in determining analyte concentration comprising:
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implanting a transcutaneous access device in a subject;
securing a sensor portion in the transcutaneous access device, the sensor portion including an optical window and a through portion downstream of the optical window in a path of optical radiation supplied to the optical window, wherein the through portion has a fixed distance relative to the transcutaneous access device;
providing optical radiation through the optical window to the through portion; and
supplying optical radiation transmitted by a sample in the through portion in response to said providing to instrumentation for determining a corresponding analyte concentration. - View Dependent Claims (19, 20)
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21. A method of obtaining optical data for use in determining analyte concentration comprising:
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providing optical radiation from a source to a sensor portion of a device, wherein the sensor portion is affixed to a transcutaneous access portion of the device which is secured to a patient;
transmitting said optical radiation through the sensor portion, the sensor portion including an optical window and a through portion downstream of the optical window in a path of the optical radiation, wherein the optical window is at a fixed location with respect to the transcutaneous access portion; and
supplying optical radiation that has been at least one of transmitted and reflected by a sample in the through portion to instrumentation for determining a corresponding analyte concentration. - View Dependent Claims (22, 23)
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24. An apparatus comprising:
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a first portion adapted to be anchored in subcutaneous tissue of a patient;
a neck portion having a distal end, and a proximal end having an inside lumen, the neck portion extending from one side of the first portion, the proximal end adapted to be external the patient; and
a sensor portion coupled to the neck portion to prevent subcutaneous access from the inside lumen of the proximal end. - View Dependent Claims (25, 26)
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Specification