Electrode disconnect system and method for medical signal monitoring system

• US 6,560,479 B2
• Filed: 01/17/2001
• Issued: 05/06/2003
• Est. Priority Date: 01/17/2001
• Status: Expired due to Fees

• Current Assignee: Viasys Healthcare Incorporated (Cardinal Health, Inc.)
• Original Assignee: Viasys Healthcare Incorporated (Cardinal Health, Inc.)
• Inventors: van Drongelen, Wim
• Primary Examiner(s): Gilbert, Samuel G.
• Application Number:
  US09/761,955
• Publication Number:
  US 20020095097A1
• Time in Patent Office: 839 Days
• Field of Search: 600/300, 600/309, 600/322, 600/345, 600/437, 600/481, 600/485, 600/490, 600/500, 600/503-504, 600/508-509, 600/526-529, 600/549, 600/561, 600/587, 600/554, 600/555, 600/558, 600/559, 128/920-924, 128/897, 128/898, 341/83-85, 341/87
• US Class Current: 600/544
• CPC Class Codes: A61B 2562/225 Connectors or couplings
• CPC Class Codes: A61B 5/377 using evoked responses
• CPC Class Codes: A61B 5/389 Electromyography [EMG]
• CPC Class Codes: A61B 5/7475 User input or interface means, e.g. keyboard, pointing device, joystick

Abstract

A system and method for easily and rapidly disconnecting electrode signals from and connecting electrode signals to amplifiers in, e.g., a medical signal monitoring system. A switching device is provided between an electrode and a corresponding electrophysiologic signal amplifier forming a signal channel. A channel disconnect selection user interface is provided for indicating selected channels. A channel disconnect user interface is provided, whereby an operator may indicate in a single action that electrode signals in the channels selected using the channel disconnect selection user interface are to be disconnected from, and reconnected to, their respective amplifiers. Electrode signals in the selected channels may be disconnected from and reconnected to their respective amplifiers automatically in timed relation to electrical stimulation provided to a subject.

Claims

1. A signal monitoring system, comprising:

(a) a plurality of signal amplifiers;

(b) a plurality of switching devices, wherein each one of the plurality of switching devices is connected to an input of a one of the plurality of signal amplifiers, each of the plurality of switching devices being responsive to a switching device control signal to control the switching device to prevent a signal from being applied to the input of a corresponding signal amplifier or to allow application of a signal to the input of the corresponding signal amplifier, each switching device and its corresponding signal amplifier forming a signal channel;

(c) a channel disconnect selection user interface to allow a user to indicate selected ones of the signal channels;

(d) a channel disconnect user interface selectable by a user; and

(e) a processor connected to the plurality of switching devices and adapted to provide the switching device control signal to control the switching devices in each channel selected using the channel disconnect selection user interface to prevent a signal from being applied to the input of the corresponding amplifiers only in such selected channels when the channel disconnect user interface is selected and to provide the switching device control signal to control the switching devices in the selected channels to allow application of a signal to the input of the corresponding amplifiers in such selected channels when the channel disconnect user interface is deselected.

2. The signal monitoring system of claim 1 wherein the plurality of switching devices are selected from the group of switching devices consisting of transistors and relays.

3. The signal monitoring system of claim 1 comprising additionally an electrode connected by a lead to the input of each signal amplifier via a corresponding one of the switching devices.

4. The signal monitoring system of claim 1 wherein each signal amplifier is adapted to amplify an electrophysiologic signal.

5. The signal monitoring system of claim 1 wherein the channel disconnect selection user interface and the channel disconnect user interface are graphical user interfaces adapted to be displayed to a user on a display.

6. The signal monitoring system of claim 5 wherein the channel disconnect selection user interface and the channel disconnect user interface include check boxes.

7. The signal monitoring system of claim 5 wherein the channel disconnect selection user interface and the channel disconnect user interface are generated by the processor.

8. A medical signal monitoring system, comprising:

(a) a plurality of electrodes adapted to be positioned on a subject to detect electrophysiologic signals;

(b) a plurality of signal amplifiers coupled to the plurality of electrodes such that each electrode and a corresponding signal amplifier form a signal channel, wherein the signal amplifiers are adapted to amplify electrophysiologic signals;

(c) a switching device connected between the electrode and the signal amplifier in each signal channel, each switching device being responsive to a switching device control signal to control the switching device to prevent a signal from being applied to a signal amplifier from a corresponding electrode, or to allow application of a signal to the signal amplifier from the corresponding electrode;

(d) a channel disconnect selection user interface to allow a user to indicate selected ones of the signal channels;

(e) a channel disconnect user interface selectable by a user; and

(f) a processor connected to the switching devices and adapted to provide the switching device control signal to control the switching devices in each channel selected using the channel disconnect selection user interface to prevent a signal from being applied to the signal amplifiers from the electrodes only in such selected channels when the channel disconnect user interface is selected and to provide the switching device control signal to control the switching devices in the selected channels to allow application of a signal to the amplifiers in such selected channels from the corresponding electrodes when the channel disconnect user interface is deselected.

9. The medical signal monitoring system of claim 8 wherein the plurality of switching devices are selected from the group of switching devices consisting of transistors and relays.

10. The medical signal monitoring system of claim 8 wherein at least one of the electrodes is connected by a lead to an input of a corresponding one of the signal amplifiers via a corresponding one of the switching devices.

11. The medical signal monitoring system of claim 8 comprising additionally a display and a user input device connected to the processor and wherein the channel disconnect selection user interface and the channel disconnect user interface are graphical user interfaces generated by the processor, displayed on the display, and selectable using the user input device.

12. The medical signal monitoring system of claim 11 wherein the channel disconnect selection user interface and the channel disconnect user interface include check boxes which are selectable using the user input device.

13. A signal monitoring method, comprising the steps of:

(a) providing a plurality of signals to be monitored on channels to a plurality of corresponding signal amplifiers;

(b) selecting selected ones of the plurality of signal channels using a channel disconnect selection user interface;

(c) selecting a channel disconnect user interface;

(d) disconnecting selected signals to be monitored from the corresponding signal amplifiers only in the signal channels selected using the channel disconnect selection user interface in response to the selection of the channel disconnect user interface;

(e) deselecting the channel disconnect user interface; and

(f) reconnecting the selected signals to be monitored to the corresponding signal amplifiers in the signal channels selected using the channel disconnect selection user interface in response to the deselection of the channel disconnect user interface.

14. The method of claim 13 wherein the step of disconnecting selected signals to be monitored from the corresponding signal amplifiers includes the step of opening switching devices connected to inputs of the signal amplifiers in the signal channels selected using the channel disconnect selection user interface, and wherein the step of reconnecting the selected signals to be monitored to the corresponding signal amplifiers includes the step of closing switching devices connected to inputs of the signal amplifiers in the signal channels selected using the channel disconnect selection user interface.

15. The method of claim 14 wherein the steps of opening and closing selected switching devices includes the steps of applying control signals to transistor switching devices.

16. The method of claim 13 wherein the step of providing a plurality of signals to be monitored includes the step of attaching a plurality of electrodes to a subject to detect a plurality of electrophysiologic signals to be monitored.

17. The method of claim 16 comprising additionally the step of providing electrical stimulation to the subject, and wherein the step of selecting the channel disconnect user interface is performed before providing electrical stimulation to the subject and the step of deselecting the channel disconnect user interface is performed after providing the electrical stimulation to the subject.

18. The method of claim 13 wherein the steps of selecting selected ones of the plurality of signal channels and selecting the channel disconnect user interface includes the steps of generating channel disconnect selection and channel disconnect graphical user interfaces, displaying the channel disconnect selection and channel disconnect graphical user interfaces on a display, and selecting the channel disconnect selection and channel disconnect graphical user interfaces using a user input device.

19. The method of claim 17 wherein the steps of generating the channel disconnect selection graphical user interface and the channel disconnect graphical user interface includes the steps of generating and displaying the channel disconnect selection and channel disconnect graphical user interfaces as check boxes.

20. A medical signal monitoring system, comprising:

(a) a plurality of electrodes adapted to be positioned on a subject to detect electrophysiologic signals;

(b) a plurality of signal amplifiers coupled to the plurality of electrodes such that each electrode and a corresponding signal amplifier form a signal channel, wherein the signal amplifiers are adapted to amplify electrophysiologic signals;

(c) a switching device connected between the electrode and the signal amplifier in each signal channel, each switching device being responsive to a switching device control signal to control the switching device to prevent a signal from being applied to a signal amplifier from a corresponding electrode, or to allow application of a signal to the signal amplifier from the corresponding electrode;

(d) a channel disconnect selection user interface to allow a user to indicate selected ones of the signal channels;

(e) a processor adapted to control the providing of an electrical stimulation signal to the subject, connected to the switching devices, and adapted to provide automatically the switching device control signal to control the switching devices in each channel selected using the channel disconnect selection user interface to prevent a signal from being applied to the signal amplifiers from the electrodes only in such selected channels during the providing of an electrical stimulation signal to the subject, and to provide automatically the switching device control signal to control the switching devices in the selected channels to allow application of a signal to the amplifiers in such selected channels from the corresponding electrodes after the providing of an electrical stimulation signal to the subject is complete.

21. The medical signal monitoring system of claim 20 wherein the plurality of switching devices are selected from the group of switching devices consisting of electrodes and relays.

22. The medical signal monitoring system of claim 20 wherein at least one of the electrodes is connected by a lead to an input of a corresponding one of the signal amplifiers via a corresponding one of the switching devices.

23. The medical signal monitoring system of claim 20 comprising additionally a display and a user input device connected to the processor and wherein the channel disconnect selection user interface is a graphical user interface generated by the processor, displayed on the display, and selectable using the user input device.

24. The medical signal monitoring system of claim 23 wherein the channel disconnect selection user interface includes a check box which is selectable using the user input device.

25. A signal monitoring method, comprising the steps of:

(a) providing a plurality of electrophysiologic signals from a subject on signal channels to a plurality of corresponding signal amplifiers;

(b) selecting selected ones of the plurality of signal channels using a channel disconnect selection user interface;

(c) providing an electrical stimulation signal to the subject;

(d) automatically disconnecting signals from the corresponding signal amplifiers only in the signal channels selected using the channel disconnect selection user interface a first time period prior to the providing of the electrical stimulation signal to the subject;

(e) automatically reconnecting the selected signals to be monitored to the corresponding signal amplifiers in the signal channels selected using the channel disconnect selection user interface a second time period following the providing of the electrical stimulation signal to the subject.

26. The method of claim 25 comprising additionally the step of selecting durations of the first and second time periods.

27. The method of claim 25 wherein the step of disconnecting signals from the corresponding signal amplifiers includes the step of opening switching devices connected to inputs of the signal amplifiers in the signal channels selected using the channel disconnect selection user interface, and wherein the step of reconnecting the signals to the corresponding signal amplifiers includes the step of closing switching devices connected to inputs of the signal amplifiers in the signal channels selected using the channel disconnect selection user interface.

28. The method of claim 25 wherein the steps of opening and closing the switching devices includes the steps of applying control signals to the switching devices.

29. The method of claim 25 wherein the step of providing a plurality of electrophysiologic signals includes the step of attaching a plurality of electrodes to the subject.

30. The method of claim 25 wherein the step of selecting selected ones of the plurality of signal channels includes the steps of generating a channel disconnect selection graphical user interface, displaying the channel disconnect selection graphical user interface on a display, and selecting the channel disconnect selection graphical user interface using a user input device.

31. The method of claim 30 wherein the step of generating the channel disconnect selection graphical user interface includes the steps of generating and displaying the channel disconnect selection graphical user interface as a check box.