Intraocular pressure sensor
First Claim
1. An intraocular pressure sensor comprising:
- a pressure sensor means for sensing pressure within they eye and for generating a sensor signal representative of the pressure;
a transponder means electrically coupled with the pressure sensor means, the transponder means including a processor means responsive to the sensor means for converting the sensor signal to a pressure signal representative of the pressure;
a sensor antenna adapted for receiving an interrogation signal generated from outside the eye;
a modulator for converting the pressure signal into a response signal; and
a power converter coupled with the sensor antenna for converting the interrogation signal to a power signal for energizing the processor means and transmitting the response signal out of the eye.
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Abstract
An intraocular pressure sensor for sensing pressure within an eye has a sensor reed and a strain gauge for sensing the pressure within they eye and for generating a sensor signal representative of the pressure. The intraocular pressure sensor also includes a transponder responsive to the strain gauge for converting the sensor signal to a pressure signal representative of the pressure. The transponder includes a processor, a sensor antenna adapted for receiving an interrogation signal generated from outside the eye, a modulator for converting the pressure signal into a response signal, and a power converter coupled with the sensor antenna for converting the interrogation signal to a power signal for energizing the processor. In addition to receiving the interrogation signal, the sensor antenna further functions to transmit the response signal out of the eye.
84 Citations
6 Claims
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1. An intraocular pressure sensor comprising:
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a pressure sensor means for sensing pressure within they eye and for generating a sensor signal representative of the pressure;
a transponder means electrically coupled with the pressure sensor means, the transponder means including a processor means responsive to the sensor means for converting the sensor signal to a pressure signal representative of the pressure;
a sensor antenna adapted for receiving an interrogation signal generated from outside the eye;
a modulator for converting the pressure signal into a response signal; and
a power converter coupled with the sensor antenna for converting the interrogation signal to a power signal for energizing the processor means and transmitting the response signal out of the eye. - View Dependent Claims (2, 3, 4)
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5. An intraocular pressure measurement system comprising:
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an activator/assessor device having an activator/assessor processor and an activator/assessor antenna for transmitting an interrogation signal;
an intraocular pressure sensor having a pressure sensor means, and a transponder means electrically coupled with the pressure sensor means, the pressure sensor means being adapted for sensing pressure within they eye, the transponder means having a sensor antenna adapted for receiving the interrogation signal, a processor means responsive to the pressure sensor means for converting the interrogation signal into a pressure signal representative of the pressure, a modulator for converting the pressure signal into a response signal, and a power converter coupled with the sensor antenna for converting the interrogation signal to a power signal for energizing the processor means and transmitting the response signal out of the eye.
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6. A method for measuring pressure in a system, the method comprising the steps of:
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providing an intraocular pressure sensor and an activator/assessor device;
providing a seminal voltage in the activator/assessor device to generate a transmittal frequency;
receiving the transmittal frequency with the intraocular pressure sensor;
generating, in response to the transmittal frequency, a consistent core voltage;
generating a second transmittal frequency using the consistent core voltage;
receiving the second transmittal frequency with the activator/assessor device;
generating a terminal voltage from the second transmittal frequency;
measuring the terminal voltage;
positioning the intraocular pressure sensor in the system;
providing the seminal voltage of the activator/assessor device to generate the transmittal frequency;
receiving the transmittal frequency with the intraocular pressure sensor;
generating from the transmittal frequency the consistent core voltage;
modifying the consistent core voltage in proportion to the pressure adjacent the intraocular pressure sensor, to generate a sensor-modified voltage;
generating a third transmittal frequency using the sensor-modified voltage;
receiving the third transmittal frequency with the activator/assessor device;
generating a second terminal voltage from the third transmittal frequency; and
comparing the terminal voltage and the second terminal voltage to determine the pressure being sensed by the intraocular pressure sensor in the system.
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Specification