Method and apparatus for monitoring physiological data from an implantable medical device

• US 5,720,771 A
• Filed: 08/02/1995
• Issued: 02/24/1998
• Est. Priority Date: 08/02/1995
• Status: Expired due to Term

• Current Assignee: Pacesetter Incorporated (Abbott Laboratories)
• Original Assignee: Pacesetter Incorporated (Abbott Laboratories)
• Inventors: Snell, Jeffery D.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): SCHAETZLE, KENNEDY
• Application Number:
  US08/510,366
• Time in Patent Office: 937 Days
• Field of Search: 128/903, 128/904, 128/696, 607/60, 607/30, 607/32, 607/18, 607/62, 607/63
• US Class Current: 607/60
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A monitoring system is provided that monitors the condition of a patient by analyzing physiological data received from implantable medical devices. The monitoring system has at least one monitoring unit, which preferably is suitable for stand-alone operation, or which may be connected to a central monitoring station. The monitoring unit, which receives the physiological data from the implantable medical devices via telemetry, determines whether a patient'"'"'s physiological condition warrants attention. If the patient'"'"'s condition is determined to be abnormal, the monitoring unit generates an audible alarm signal or generates an alarm signal that is transmitted to the central monitoring station.

Claims

1. A monitoring system for monitoring the physiological condition of a patient who has an implantable cardiac stimulating device capable of transmitting data that is representative of the physiological condition of the patient and data that is representative of the condition of the device, the monitoring system comprising:

at least one monitoring unit that may operate unattended, the monitoring unit having;

a telemetry head for receiving the data that is transmitted from the implantable cardiac stimulating device,

a control unit for receiving the data from the telemetry head, the control unit comprising analyzing means for analyzing the received data to determine whether the implantable cardiac stimulating device is operating properly;

status of the physiological condition of the patient and whether an alarm condition exists,

an input interface for permitting programming of the control unit, and

transmission means connected to the control unit for transmitting data and analyses and for transmitting an alarm signal if the control unit determines that an alarm condition exists; and

a central monitoring station, remote from the patient, for receiving the alarm signal, data and analyses when transmitted from the monitoring unit by the transmission means and wherein the central monitoring station comprises means for displaying that an alarm condition exists.

2. The monitoring system of claim 1, further comprising:

a bus connecting the monitoring unit to the central station, and wherein the transmission means connected to the control unit comprises a bus interface connected to the bus.

3. The monitoring system of claim 2, wherein the monitoring unit comprises:

a tablet computer to which the telemetry head is coupled; and

a base station, to which the tablet computer can be coupled, and which contains the bus interface.

4. The monitoring system of claim 1, wherein the control unit comprises:

means for receiving physiological data transmitted by the implantable cardiac stimulating device;

a monitoring unit control program; and

means for executing the monitoring unit control program, whereby the monitoring unit control program determines whether the alarm condition exists based on an analysis of the physiological data.

5. The monitoring system of claim 1, wherein the monitoring unit comprises means for continually receiving data from the implantable cardiac stimulating device.

6. The monitoring system of claim 1, wherein the central monitoring station comprises means for periodically generating alarm signal requests.

7. The monitoring system of claim 1, wherein the monitoring unit comprises means for transmitting the alarm signal asynchronously and wherein the central monitoring station comprises means for receiving the alarm signal from the monitoring unit asynchronously.

8. A system for monitoring a person'"'"'s physical condition, comprising:

an implantable cardiac stimulating device capable of transmitting event markers and physiological data;

at least one monitoring unit that may operate unattended, the monitoring unit having;

a telemetry head for receiving the event markers and physiological data transmitted by the implantable cardiac stimulating device,

a control unit for receiving and analyzing the event markers and physiological data from the telemetry head, said control unit comprising analyzing means for analyzing the event markers and physiological data and alarm determination means for determining whether an alarm condition exists, and

transmission means connected to the control unit for transmitting event markers, analyses and for transmitting an alarm signal if the control unit determines that an alarm condition exists; and

a central monitoring station for receiving the alarm signal, event markers, physiological data and analyses when transmitted from the monitoring unit by the transmission means.

9. The system of claim 8, wherein the monitoring unit further comprises:

an input interface for programming the control unit.

10. The system of claim 9, wherein the monitoring unit comprises:

a tablet computer to which the telemetry head is coupled; and

a base station, to which the tablet computer can be coupled, and which contains the bus interface.

11. The system of claim 8, further comprising:

a bus connecting the monitoring unit to the central station, and wherein the transmission means connected to the control unit comprises a bus interface connected to the bus.

12. The system of claim 8, wherein the analyzing means of the control unit comprises means for determining the physiological condition of the person'"'"'s heart.

13. The system of claim 8, wherein the analyzing means of the control unit comprises means for determining the condition of the implantable cardiac stimulating device.

14. The system of claim 8, wherein the monitoring unit comprises means for continually receiving event markers and physiological data transmitted from the implantable cardiac stimulating device.

15. The system of claim 8, wherein the central monitoring station comprises means for periodically generating alarm signal requests.

16. The system of claim 8, wherein the monitoring unit comprises means for transmitting the alarm signal asynchronously and wherein the monitoring unit comprises means for transmitting the alarm signal asynchronously.

17. The system of claim 8, wherein the monitoring unit comprises means for unattended operation.

18. The system of claim 17, wherein the monitoring unit comprises means for producing an alarm signal.

19. The system of claim 18, wherein the analyzing means of the control unit comprises means for performing a plurality of analyses on a plurality of event markers and physiological data representing a plurality of device and physiological conditions and wherein the alarm determination means comprises means for determining an alarm condition based upon the plurality of analyses.

20. A method for unattended monitoring of the physiological condition of a patient who has an implanted cardiac stimulating device and for the unattended monitoring of the device itself, the method comprising the steps of:

transmitting event markers and physiological data from the implanted cardiac stimulating device;

receiving the transmitted event markers and physiological data with a monitoring unit;

analyzing the event markers and physiological data with a control unit associated with the monitoring unit to determine if an alarm condition exists; and

transmitting an alarm signal to a central monitoring station when it is determined that an alarm condition exists.

21. The method of claim 20 wherein the step of receiving the event markers and physiological data transmitted form the implantable cardiac stimulator comprises receiving the event markers and physiological data continually.

22. The method of claim 20 further comprises the step of generating alarm signal requests at the central monitoring station.

23. The method of claim 20 wherein the step of transmitting the alarm signal to the central monitoring station asynchronously.

24. The method of claim 20 wherein the step of transmitting the alarm signal to the central monitoring station comprises the steps of:

generating buffered data output signals with a bus interface contained within the monitoring unit; and

providing the buffered data output signals to a bus that is coupled between the bus interface and the central monitoring station.

25. The method of claim 20, wherein analyzing the event markers and physiological data further comprises the step of:

determining if a plurality of parameters exceed their respective predetermined acceptable limits in order to determine if an alarm condition exists.