Noninvasive detection of a physiologic parameter within a body tissue of a patient
Inventors
Anderson, Edward J. • Reynolds, Brandon W. • Winger, Kent R. • Kimball, Victor E.
Assignees
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Publication Number
US-8996090-B2
Publication Date
2015-03-31
Expiration Date
Abstract
The invention provides a device for contacting a surface of a tissue within a patient's body to determine a physiologic parameter of the patient. The device typically comprises a sensor responsive to the physiologic parameter and a probe housing the sensor. The probe is constructed to allow the sensor to be secured at a sensing area adjacent to a surface of a patient's tissue, without need for an adhesive and without disturbing the blood flow within the measurement region of the tissue. The device may also include a means for reducing interference in the sensing area. Preferably, the device further comprises an indicating means operably connected to the sensor for indicating an analyte quantity and/or concentration associated with the physiologic parameter. The invention also provides a method for determining a physiologic parameter of a patient.
Core Innovation
The invention relates to a device for preventing the application of excessive pressure to a measurement region in tissue. The device includes a probe body with distal and proximal ends, where the distal end has a top non-permeable covered portion and a bottom portion defined by a perimeter surface that defines a recess. A single sensor is unobstructedly positioned within the recess so that the sensor is responsive to a quantity of analyte to be measured.
In use, the top non-permeable covered portion and the perimeter surface create a covered, isolated measurement area within the recess. The recess contains the analyte and prevents dissipation of the analyte from the measurement area. The configuration of the perimeter surface and the position of the sensor within the recess allows the analyte measurement to be free of pressure artifact.
The disclosed sensor is responsive to analyte concentration through a chemical reaction with a reactant, and the device is described as preventing excessive pressure and associated pressure artifact during tissue measurement. In variants, the sensor is positioned within the recess so as not to contact the tissue surface, and the device may include a clip member coupled to the probe body for immobilizing the device with respect to tissue.
Claims Coverage
The partial content provides three independent claims. Across these claims, the coverage centers on a probe body that defines a covered, isolated recess-based measurement area with a single sensor, configured so analyte measurement is free of pressure artifact, with additional claim-specific requirements for sensor placement and immobilizing by a clip member, and specifying chemical-reaction-based sensor responsiveness in at least one claim.
Covered isolated measurement area within a recess
A probe body having a distal end including a top non-permeable covered portion and a bottom portion defined by a perimeter surface that defines a recess, wherein in use the top non-permeable covered portion and the perimeter surface create a covered, isolated measurement area within the recess containing analyte thereby prevented from dissipating and allowing the analyte measurement to be free of pressure artifact.
Single analyte sensor positioned unobstructedly within the recess
A single sensor responsive to a quantity of analyte to be measured, the sensor being unobstructedly positioned within the recess.
Sensor responsive to analyte concentration through a chemical reaction with a reactant
The analyte measurement is free of pressure artifact, wherein the sensor is responsive to analyte concentration through a chemical reaction with a reactant.
Sensor unobstructedly positioned within the recess so as not to contact tissue surface
A single sensor responsive to a physiologic parameter to be measured, the sensor being unobstructedly positioned within the recess so as not to contact said tissue surface.
Clip member coupled to immobilize the device relative to tissue
A clip member coupled to the probe body for immobilizing the device with respect to the tissue, the clip member having a first portion generally perpendicular from the probe and a second portion generally parallel to the probe, wherein in use the configuration of the perimeter surface and the position of the sensor within the recess allows the analyte measurement to be free of pressure artifact.
Collectively, the independent claims cover a tissue-contact probe structure that forms a covered, isolated recess-based measurement area with a single sensor positioned to prevent pressure artifacts. The scope includes chemical-reaction-based sensor responsiveness and, depending on the claim, sensor placement not contacting the tissue surface and immobilization using a clip member.
Stated Advantages
Preventing the application of excessive pressure to a measurement region in tissue.
An analyte measurement that is free of pressure artifact.
An analyte measurement area where analyte is prevented from dissipating from the measurement area.
Documented Applications
No documented applications found
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