Telemetric reader/charger device for medical sensor

• US 6,658,300 B2
• Filed: 12/18/2000
• Issued: 12/02/2003
• Est. Priority Date: 12/18/2000
• Status: Expired due to Term

• Current Assignee: Biosense, Inc. (Cardinal Health, Inc.)
• Original Assignee: Biosense, Inc. (Cardinal Health, Inc.)
• Inventors: Govari, Assaf, Ben-Haim, Shlomo, Zilberstein, Joel
• Primary Examiner(s): WOLFE JR, WILLIS RAY
• Application Number:
  US09/739,575
• Publication Number:
  US 20020077672A1
• Time in Patent Office: 1,079 Days
• Field of Search: 607/30, 607/32, 607/60, 600/300, 600/301, 600/347, 600/483, 600/484, 600/485, 600/486, 600/488, 128/898, 128/903, 128/904, 340/870.07, 340/870.28, 340/870.29, 340/573.1, 340/10.1, 340/10.34, 205/778
• US Class Current: 607/60
• CPC Class Codes: A61B 2560/0219 of externally powered implanted units
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/076 Permanent implantations telemetry using implanted circuitry A61B5/0031; implanted stimulators for therapy A61N1/3605, A61N1/362, A61N1/372
• CPC Class Codes: A61B 5/6882 Anchoring means
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A signal reading and charging device for use with an implantable telemetric medical sensor comprises a casing and a circuit within the casing comprising a logic control unit and a processing unit. The logic control unit sends a powering signal to the telemetric medical sensor for remotely powering the sensor. The logic control unit also receives a transmitted signal from the sensor. The processing unit is operatively connected to the control unit for converting the transmitted signal by the sensor into a measured parameter. An antenna coil is used for sending the powering signal and receiving the transmitted signal from the sensor. The device also includes a display for displaying the measured parameter.

Claims

1. A signal reading and charging device and an implantable telemetric medical sensor combination, the combination comprising:

(i) telemetric medical sensor comprising

(a) housing;

(b) a membrane at one end of the housing, the membrane being deformable in response to the parameter;

(c) a microchip positioned within the housing and operatively communicating with the membrane for transmitting a signal indicative of the parameter, wherein the signal is a digital signal, the microchip comprising an array of photoelectric cells;

(d) an LED for transmitting light at the photoelectric cells; and

(e) a shutter connected to the membrane and moveable between the photoelectric cells and the LED in response to deforming of the membrane;

(ii) a signal reading and charging device comprising;

(a) a casing; and

(b) a circuit within the casing comprising a logic control unit and a processing unit, the logic control unit for sending a powering signal to the telemetric medical sensor for remotely powering the sensor, the logic control unit also for receiving a transmitted signal from the sensor, the processing unit operatively connected to the control unit for converting the transmitted signal by the sensor into a measured parameter.

2. The combination of claim 1, including an antenna coil for sending the powering signal and receiving the transmitted signal from the sensor.

3. The combination according to claim 2, wherein the antenna coil has inductive coupling with the sensor.

4. The combination of claim 2, wherein the circuit has an active reading volume around the sensor of approximately 5-25 cm.

5. The combustion of claim 4, wherein the active reading volume is approximately 10-15 cm.

6. The combustion of claim 2, wherein the circuit maintains multiple readings per second from the sensor.

7. The combustion according to claim 6, wherein there are 10-20 readings per second.

8. The combination of claim 2, including a display for displaying the measured parameter.

9. The combination of claim 8, wherein the display is an LCD screen.

10. The combination of claim 8, including a sine wave driver operatively connected to the control unit for sending the powering signal to the sensor.

11. The combination of claim 10, wherein the powering signal is a sinusoidal wave signal approximately 4-6 MHz.

12. The combination of claim 1, wherein the processing unit decodes the transmitted signal.

13. The combination of claim 12, wherein the processing unit includes an algorithm for converting the transmitted signal into a measured parameter.

14. The combination of claim 13, including an LCD for displaying the measured parameter.

15. The combination of claim 14, wherein the parameter is hemodynamic blood pressure.

16. The combination of claim 12, including a deep detector for receiving the transmitted signal.

17. The combination of claim 16, wherein the deep detector detects a change in amplitude for the transmitted signal for as low as 0.01% change in amplitude.

18. The combination of claim 16, including a power source operatively connected to the circuit.

19. The combination of claim 18, including a power switch for activating and deactivating the device.