Physiological sensor system

• US 20020077560A1
• Filed: 09/18/2001
• Published: 06/20/2002
• Est. Priority Date: 09/25/2000
• Status: Active Grant

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Kramer, Michael, Maerzendorfer, Walter, Schaetzle, Ulrich
• Granted Patent: US 6,711,434 B2
• Time in Patent Office: Days
• US Class Current: 600/509
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/055 involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/308 for electrocardiography [ECG]
• CPC Class Codes: G01R 33/28 Details of apparatus provided for in groups G01R33/44 - G01R33/64

Abstract

A physiological sensor system is provided for recording electrical measurement signals in an environment which impairs the recording, in particular in a magnetic resonance instrument, having a plurality of measurement electrodes as well as a signal amplifier device, a power supply and an electronic device for signal conversion and signal transmission to an external signal processing and/or control instrument. The measurement electrodes (3, 4, 5, 14, 15, n) and the signal amplifier device (6, 16) are arranged in a first shielded casing (2, 13), and the power supply and the electronic device being arranged in a second shielded casing (9), the signal amplifier device (6, 16) being connected or connectable to the electronic device and the power supply through a shielded and/or twisted-wire cable connection (7, 17).

Claims

1. A physiological sensor system for recording electrical measurement signals in an environment which impairs recording, comprising:

a plurality of measurement electrodes;

a signal amplifier device connected to one or more of said measurement electrodes;

a power supply;

an electronic device comprising a signal conversion device and an electronic signal transmission device that transmits to at least one of an external signal processing and a control instrument;

a first shielded sensor casing arranged close to a patient having the following elements in or on said first shielded sensor casing;

said measurement electrodes and said signal amplifier device;

a second shielded casing arranged close to said patient having the following elements in said second shielded casing;

said power supply and said electronic device, said signal amplifier device being connected or connectable to said electronic device and said power supply through at least one of a shielded cable connection and a twisted-wire cable connection.

2. The physiological sensor system as claimed in claim 1, wherein said signal amplifier device is arranged in immediate proximity to said measurement electrodes.

3. The physiological sensor system as claimed in claim 1, further comprising additional shielded sensor casings, each with a plurality of measurement electrodes and an allocated signal amplifier device, different measurement signals being recordable by measurement electrodes of a respective sensor casing, and each signal amplifier device being connected or connectable to said electronic device and said power supply through at least one of a separate shielded cable connector and a twisted-wire cable connection.

4. The physiological sensor system as claimed in claim 3, wherein one of said measurement electrodes of one of said sensor casings are configured to record ECG measurement signals and another of said measurement electrodes of another of said sensor casings are configured to record EEG measurement signals.

5. The physiological sensor system as claimed in claim 1, wherein said signal amplifier device is configured, when at least one of said measurement electrodes is configured to record ECG measurement signals, to amplify measurement signals or to form leadoff-specific differential signals.

6. The physiological sensor system as claimed in claim 5, further comprising operational amplifiers for at least one of said amplification and said differential signal formation.

7. The physiological sensor system as claimed in claim 1 wherein said signal conversion device is a signal conversion module and wherein said signal transmission device is a signal transmission module, both of which are coupled to said power supply.

8. The physiological sensor system as claimed in claim 7, wherein said signal conversion module comprises at least one filter and at least one converter unit.

9. The physiological sensor system as claimed in claim 8, wherein said converter unit is an analog/digital converter or a voltage/frequency converter.

10. The physiological sensor system as claimed in claim 8, further comprising:

separate filters provided for each measurement signal input; and

a multiplexer connecting said converter unit to said at least one filter and said separate filters.

11. The physiological sensor system as claimed in claim 10, further comprising a control line permitting controlling operation of said multiplexer.

12. The physiological sensor system as claimed in claim 7, wherein said power supply comprises a battery or an accumulator to which a switch that can be actuated through an external magnetic field is allocated.

13. The physiological sensor system as claimed in claim 7, further comprising an optical fiber, said power supply comprising one or more solar cells which can be illuminated with light that can be fed through said optical fiber.

14. The physiological sensor system as claimed in claim 7, further comprising a fluorescence collector arranged on an outside position of said second shielded casing and captures ambient light, said power supply comprising one or more solar cells which can be illuminated with light that can be fed through said fluorescence collector.

15. The physiological sensor system as claimed in claim 7, wherein said power supply comprises at least one capacitor which is connected to coils that are arranged on an outside of said second shielded casing and deliver a voltage when an external magnetic field is applied.

16. The physiological sensor system as claimed in claim 13, further comprising at least one storage capacitor having a capacitance≧

1 F which provides power during operation and can be recharged by said one or more solar cells during operation, said at least one storage capacitor being allocated to said solar cells or to said at least one capacitor.

17. The physiological sensor system as claimed in claim 14, further comprising at least one storage capacitor having a capacitance≧

1 F which provides power during operation and can be recharged by said one or more solar cells during operation, said at least one storage capacitor being allocated to said solar cells or to said at least one capacitor.

18. The physiological sensor system as claimed in claim 15, further comprising at least one storage capacitor having a capacitance≧

1 F which provides power during operation and can be recharged by said one or more solar cells during operation, said at least one storage capacitor being allocated to said solar cells or to said at least one capacitor.

19. The physiological sensor system as claimed in claim 16, further comprising a external charging station at which said storage capacitor can be charged.

20. The physiological sensor system as claimed in claim 17, further comprising a external charging station at which said storage capacitor can be charged.

21. The physiological sensor system as claimed in claim 18, further comprising a external charging station at which said storage capacitor can be charged.

22. The physiological sensor system as claimed in claim 7, wherein said signal transmission module is a radio transmission module based on one or more radio frequencies.

23. The physiological sensor system as claimed in claim 7, wherein said signal transmission module is an infrared transmission module having at least one infrared transmission diode with an allocated optical line.

24. The physiological sensor system as claimed in claim 7, wherein said signal transmission module is a fiber optic transmission module having at least one transmission diode with an allocated fiber optic line.

25. The physiological sensor system as claimed in claim 7, wherein said signal transmission module is an ultrasonic wave module having at least one ultrasound transducer.

26. The physiological sensor system as claimed in claim 7, further comprising an input for an external control line provided at said signal transmission module, control signals being looped through internal control lines from said signal transmission module to said signal conversion module.

27. The physiological sensor system as claimed in claim 26, further comprising an optical receiver which transforms optical control signals provided through an optical control line into electrical control signals, said optical receiver being allocated to a respective one of said internal control lines provided at said signal transmission module.

28. The physiological sensor system as claimed in claim 7, further comprising an ultrasound signal line arranged at said signal transmission module that is designed as an ultrasonic wave module, said ultrasound signal configured to transmit control signals which are transformed into electrical control signals by at least one ultrasound transducer provided on said signal transmission module.

29. The physiological sensor system as claimed in claim 1, further comprising at least one further sensor element which registers non-electrical measurement information, said at least one further sensor element being connected or connectable to said second casing, said electronic device comprising a converter for converting said non-electrical measurement information into electrical measurement signals.

30. The physiological sensor system as claimed in claim 29,

wherein said at least one further sensor element is an optical sensor element;

said physiological sensor system further comprising;

at least one fiber optic line through which optical measurement information is sent to said electronic device; and

an optoelectronic converter for conversion of said optical measurement information into electrical measurement signals.

31. The physiological sensor system as claimed in claim 30, wherein said optical sensor element is a finger ring.

32. The physiological sensor system as claimed in claim 29,

wherein said at least one further sensor element is a pneumatic sensor element;

said physiological sensor system further comprising;

a pressure line through which said pneumatic sensor element is coupled to said electronic device; and

a pressure sensor for conversion of pneumatic measurement information into electrical measurement signals.

33. The physiological sensor system as claimed in claim 32, wherein said pneumatic sensor element is a flexible chest ring.