Patient monitoring area network

• US 6,749,566 B2
• Filed: 02/13/2002
• Issued: 06/15/2004
• Est. Priority Date: 02/14/2001
• Status: Expired due to Term

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Draeger Medical Systems Incorporated (Dragerwerk AG)
• Inventors: Russ, Tomas
• Primary Examiner(s): Hindenburg, Max F.
• Assistant Examiner(s): ASTORINO, MICHAEL C
• Application Number:
  US10/075,674
• Publication Number:
  US 20020115914A1
• Time in Patent Office: 853 Days
• Field of Search: 600/300, 600/301, 600/483-484, 600/490, 600/508-509, 600/555, 128/903-904, 128/920-921, 705/2-4, 340/573--57, 340/538-539, 379/106--10, 379/38, 607/28-32, 607/59-60, 702/200, 702/208-211, 702/100, 455/418-419, 455/423
• US Class Current: 600/300
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/0024 for multiple sensor units attached to the patient, e.g. using a body or personal area network
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: Y10S 128/903 Radio telemetry
• CPC Class Codes: Y10S 128/904 Telephone telemetry

Abstract

A system that allows patient monitoring data obtained by patient connected devices to be transferred by wireless signals to another device such as a patient monitoring processor. The same patient connected devices are used to transfer data to the patient monitor processor or a central station depending on the location of the patient. A single device is used for both a personal area network and a telemetry/transport application. The same wireless technology is used in both situations and eliminates the need to deploy more than one antenna/receiver system. Existing wireless transfer protocols such as Bluetooth are used, thereby reducing transmission power when the two communicating devices are in close proximity.

Claims

1. A patient area network, comprising:

(a) at least two patient connected devices, each of the at least two patient connected devices comprising

a sensor adapted to detect and store at least one physiological parameter from a patient; and

a radio frequency transceiver adapted to communicate with a patient monitor processor; and

(b) the patient monitor processor adapted to receive wireless physiological data from the at least two patient connected devices and to transmit wireless instructions to the at least two patient connected devices, the patient monitor processor being configured to act as one of (i) a master station within a cell and (ii) a slave station within a cell;

wherein the patient monitor processor is configured to;

display physiological data received from each of the at least two patient connected devices;

interpret physiological data received from each of the at least two patient connected devices; and

synchronize operation of each of the at least two patient connected devices with other of the at least two patient connected devices.

2. The patient area network of claim 1 further comprising a central station adapted to send and receive data from each patient connected device.

3. The patient area network of claim 2 wherein the central station further comprises:

a radio frequency transceiver configured to communicate with each patient connected device.

4. The patient area network of claim 3 further comprising a wireless data transfer protocol adapted to reduce transmission power in response to close proximity of a patient connected device to any data receiving device within the cell.

5. The patient area network of claim 4 further comprising:

a master antenna; and

an extension cable interconnecting the master antenna and the patient monitor processor configured to decrease separation between the patient connected device and the patient monitor processor.

6. The patient area network of claim 5 wherein the patient monitor processor comprises a web browser.

7. The patient area network of claim 6 wherein the patient monitor processor is interconnected to a local area network.

8. The patient area network of claim 7 wherein the local area network comprises an internet connection.

9. A method of monitoring physiological signs from a patient, comprising the steps of:

using at least one physiological parameter sensor adapted to be attached to a patient;

interconnecting the physiological parameter sensor to a first wireless transceiver;

transmitting a physiological data signal from the first wireless transceiver to a patient monitor processor;

interconnecting the patient monitor processor to a second wireless transceiver;

transmitting informational data from the second wireless transceiver to the first wireless transceiver; and

designating the patient monitor processor as one of (a) a master station in a wireless cell and (b) a slave station in a wireless cell;

wherein the patient monitor processor performs the steps of

displaying physiological data received from each patient connected device;

interpreting physiological data received from each patient connected device; and

synchronizing operation of each patient connected device with other patient connected devices.

10. The method of claim 9, further comprising the steps of:

interconnecting an auxiliary processor to a central station;

transmitting data from the first wireless transceiver to the auxiliary processor; and

transmitting data from the auxiliary processor to the first wireless transceiver.

11. The method of claim 10 further comprising the step of communicating between the first wireless transceiver and the auxiliary processor by means of a wireless protocol that reduces transmission power as path length between the first wireless transceiver and the auxiliary processor decreases.

12. The method of claim 11, further comprising the step of interconnecting an antenna to the second wireless transceiver by means of an extension cable so as to decrease the path length between the antenna and the first wireless transceiver.

13. The method of claim 12, further comprising the step of configuring the patient monitor processor as a web browser.

14. The method of claim 13 further comprising the step of interconnecting the patient monitor processor to a local area network.

15. The method of claim 14 further comprising the step of linking the local area network to an internet connection.

16. A method of monitoring physiological signals from a patient, comprising the steps of:

using at least one physiological parameter sensor adapted to be attached to a patient;

interconnecting the physiological parameter sensor to a first wireless transceiver of a patient connected device;

adaptively conditioning a physiological data signal for at least one of, (a) an ambulatory patient mode and (b) a non-ambulatory patient mode;

designating a patient monitor processor as one of (a) a master station in a wireless cell and (b) a slave station in a wireless cell; and

transmitting said physiological data signal from the first wireless transceiver to the patient monitor processor, which is adapted to receive wireless physiological data from the patient connected device and to transmit wireless instructions to the patient.

17. The method of claim 16 further comprising the step of adaptively selecting between said ambulatory patient mode and said non-ambulatory patient mode in response to user command.

18. The method of claim 16 wherein said transmitting step uses a single transmitter for both said ambulatory patient mode and said non-ambulatory patient mode.

19. The method of claim 16 further comprising the steps of:

using a plurality of physiological parameter sensors of different type attached to a patient;

interconnecting said physiological parameter sensors to at least one wireless transceiver;

adaptively conditioning physiological data signals containing different types of physiological data for at least one of, (a) an ambulatory patient mode and (b) a non-ambulatory patient mode; and

transmitting said physiological data signals from said at least one wireless transceiver to a patient monitor processor.

20. The method of claim 19 including the step of using a map for dynamically allocating said physiological data signals to corresponding ports on said at least one transceiver.

21. The method of claim 19 wherein said different types of physiological data include at least two of, (a) EKG/ECG data, (b) EEG data, (c) blood pressure data, (d) respiratory data, (e) blood parameter data, (f) pulse rate data and (g) muscle activity associated data.

22. A patient area network, comprising:

(a) a plurality of patient connected devices, each of said plurality of patient connected devices comprising;

(i) at least one sensor adapted to detect and store at least one physiological parameter from a patient; and

(ii) a radio frequency transceiver;

(b) a plurality of patient monitor processors adapted to receive wireless physiological data from the radio frequency transceiver of each of the plurality of patient connected devices and to transmit wireless instructions to each of the plurality of patient connected devices, each of the plurality of patient monitor processors being configured to act as one of;

(i) a master station within a cell; and

(ii) a slave station within a cell;

(c) a plurality of auxiliary processors adapted to receive wireless physiological data from each of the plurality of patient connected devices and to transmit wireless instructions to each of the plurality of patient connected devices, said plurality of auxiliary processors each being configured to act as one of

(i) a master station within a cell; and

(ii) a slave station within a cell;

(d) a central database server connected to said plurality of auxiliary data processors for receiving physiological data therefrom, said central database server including;

(i) means for receiving physiological data from said plurality of patient connected devices and said plurality of patient monitor processors;

(ii) means for storing said received physiological data; and

(iii) means for continuously receiving, storing, and synchronizing physiological data derived from a respective patient connected device operating in any of (a) an ambulatory patient mode and (b) non-ambulatory patient mode.