Bidirectional communication between a sensor unit and a monitor unit in patient monitoring

• US 6,801,137 B2
• Filed: 04/23/2001
• Issued: 10/05/2004
• Est. Priority Date: 04/23/2001
• Status: Expired due to Term

• Current Assignee: Braemar Incorporated
• Original Assignee: Cardionet Incorporated
• Inventors: Eggers, Philip N.
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): Dang, Hung Q
• Application Number:
  US09/841,134
• Publication Number:
  US 20020186821A1
• Time in Patent Office: 1,261 Days
• Field of Search: 340/870.09, 340/539, 340/825.36, 340/825.39, 340/7.33, 340/7.36, 340/573.4, 128/903, 455/1, 455/63, 455/67.1, 455/67.3, 455/68, 392/357.07, 392/357.09, 379/38
• US Class Current: 340/870.09
• CPC Class Codes: G08B 25/009 Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence

Abstract

A monitoring system includes a remote monitoring unit with a sensor unit in bidirectional wireless communication with a monitor unit. Information is transmitted bidirectionally between the sensor unit and the monitor unit. The monitor unit may inform the sensor unit that transmitted data has been corrupted, that the distance between the units is becoming too large, that transmission signal strength may be altered, that interference requires a change in transmitting frequency, or that attention is needed by the patient to the monitor unit.

Claims

1. A method for monitoring a patient, the method comprising:

providing a monitoring system comprising

a remote monitoring unit comprising

a sensor unit adapted to be carried on the body of a patient, the sensor unit comprising

a sensor having a sensor output,

a sensor bidirectional local transceiver that receives the sensor output, and

a sensor unit processor in communication with the sensor unit bidirectional local transceiver, and

a monitor unit, wherein the monitor unit is configured to be carried on the body of a person, the monitor unit comprising

a monitor unit bidirectional local transceiver that supports bidirectional wireless communications with the sensor bidirectional local transceiver,

a monitor unit processor in communication with the monitor unit bidirectional local transceiver, and

a monitor unit bidirectional remote transceiver in communication with the monitor unit processor; and

a base station having a cradle configured to interface with the monitor unit, the base station supporting bidirectional communications between the monitor unit and a central unit;

transmitting information bidirectionally between the sensor unit and the monitor unit.

2. The method of claim 1, wherein transmitting comprises

the sensor unit transmitting information to the monitor unit,

the monitor unit determining a signal strength of the information, and

the monitor unit transmitting a distance warning signal to the sensor unit.

3. The method of claim 1, wherein transmitting comprises

the sensor unit transmitting information to the monitor unit at a first power output,

the monitor unit determining a signal strength of the information, and

the monitor unit transmitting a signal-strength signal to the sensor unit.

4. The method of claim 3, further comprising

the sensor unit adjusting the power output to a second power output.

5. The method of claim 1, wherein transmitting comprises

the sensor unit transmitting information to the monitor unit at a first frequency,

the monitor unit determining whether the signal is adversely affected by frequency-dependent interference,

the monitor unit transmitting a frequency-change signal to the sensor unit in the event that the information is adversely affected by frequency-dependent interference.

6. The method of claim 5, further comprising

the sensor unit transmitting further information to the monitor unit at a second frequency.

7. The method of claim 1, wherein transmitting comprises

the sensor unit transmitting information to the monitor unit, and

the monitor unit transmitting a warning signal to the sensor unit.

8. The method of claim 1, wherein providing a monitoring system further comprises

providing the central unit comprising

a central unit bidirectional remote transceiver supporting bidirectional communications with the monitor unit bidirectional remote transceiver, and

a central unit processor in communication with the central unit bidirectional remote transceiver.

9. The method of claim 8, wherein the method for monitoring a patient further comprises

transmitting information bidirectionally between the monitor unit and the central unit.

10. A monitoring system for monitoring a patient comprising:

a remote monitoring unit comprising;

a sensor unit comprising;

a sensor having a sensor output,

a sensor bidirectional local transceiver that receives the sensor output, and

a sensor unit processor in communication with the sensor unit bidirectional local transceiver;

a monitor unit, wherein the monitor unit is configured to be carried on the body of a person, the monitor unit comprising;

a monitor unit bidirectional local transceiver that supports bidirectional wireless communications with the sensor bidirectional local transceiver,

a monitor unit processor in communication with the monitor unit bidirectional local transceiver, and

a monitor unit bidirectional remote transceiver in communication with the monitor unit processor; and

a base station having a cradle configured to interface with the monitor unit, the base station supporting bidirectional communications between the monitor unit and a central unit.

11. The monitoring system of claim 10, wherein the monitoring system further comprises

the central unit comprising

a central unit bidirectional remote transceiver supporting bidirectional communications with the monitor unit bidirectional remote transceiver, and

a central unit processor in communication with the central unit bidirectional remote transceiver.