Implantable medical device with enclosed physiological parameter sensors or telemetry link
First Claim
Patent Images
1. A pulse oximetry sensor comprising:
- a first pulse oximeter including a first photodetector having a light-sensing surface;
a second pulse oximeter including a second photodetector having a light-sensing surface; and
a body encapsulating and sealing said first and said second pulse oximeters in a predetermined orientation such that said light-sensing surfaces of said first and second photodetector face in different directions.
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Abstract
An implantable medical device, such as a cardiac pacer, defibrillator or drug delivery system, includes a container housing the required power source and circuitry and a header portion molded or glued to the container housing. Sensors, including physiological parameter sensors as may be necessary to control and implement the operation of the implantable device, or a telemetry link, or both, are disposed and sealed within the header. The header may include electromagnetic focusing devices to enhance the performance of the sensors. The sensors may include two pulse oximetry sensors that provide differential measurements to improve detection of arterial blood flow.
199 Citations
26 Claims
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1. A pulse oximetry sensor comprising:
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a first pulse oximeter including a first photodetector having a light-sensing surface; a second pulse oximeter including a second photodetector having a light-sensing surface; and a body encapsulating and sealing said first and said second pulse oximeters in a predetermined orientation such that said light-sensing surfaces of said first and second photodetector face in different directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A pulse oximetry sensor apparatus comprising:
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a first pulse oximeter including a first photodetector having a light-sensing surface; a second pulse oximeter including a second photodetector having a light-sensing surface; a body encapsulating and sealing said first and said second pulse oximeters in a predetermined orientation such that said light-sensing surfaces of said first and second photodetector face in different directions, said body constructed of a material selected from the group consisting of epoxy, ceramic, plastic, or glass, such that said body is at least translucent; wherein selected portions of said body are made of a material having a volume resistivity less than 10 megaohm cm; wherein said body has a dielectric constant greater than 3; wherein said body has high optical transmissivity to wavelengths between 350 nanometers and 900 nanometers; a telemetry transducer for communicating with a device remote from said sensor; and a photoemitter capable of emitting through said body an optical signal to be received as reflected light by one or more of said first and second photodetectors; wherein said first and second photodetector is capable of receiving through said body an optical signal from said photoemitter, indicative of the measure of oxygen content in a substance outside said body.
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Specification