Patient monitor with integrated closed loop controller

• US 8,423,381 B2
• Filed: 03/11/2009
• Issued: 04/16/2013
• Est. Priority Date: 03/17/2008
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Gegner, Guenter, Neumann, Rolf, Tivig, Gerhard, Greiner, Halald
• Primary Examiner(s): PAULS, JOHN A
• Application Number:
  US12/922,879
• Publication Number:
  US 20110015944A1
• Time in Patent Office: 1,497 Days
• Field of Search: 705/2, 128/204.23
• US Class Current: 705/2
• CPC Class Codes: A61B 5/083 Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
• 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: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

The invention concerns a system for monitoring and controlling a patient (1), with a patient sensor (2) for capturing a patient signal, and a user interface (6) for providing a user with information on the captured patient signal, wherein the system comprises an integrated closed loop controller (4) which is fed with the patient signal and which controls a patient treating device (5) for treating the patient (1). Thus, an easy and efficient way of monitoring and controlling a patient is provided.

Claims

1. A system for monitoring a patient and controlling patient treatment, the system comprising:

a patient sensor for capturing a patient signal;

a user interface for providing a user with information on the captured patient signal;

an integrated closed loop controller which is fed with the patient signal in a processed state and which controls a patient treating device for treating the patient, wherein the integrated closed loop controller includes a transfer function model controlling the patient treating device based on an input target value for the patient signal, wherein the transfer function model is dynamical adjusted based on deviations between the input target value and an output value of the patient signal, and wherein the user is provided with a warning in response to dynamic adjustment of the transfer function model;

a monitoring processer for processing the patient signal and for outputting processed data to the user interface; and

a control processer for processing the patient signal and for outputting the patient signal in the processed state to the integrated closed loop controller, wherein the monitoring processer and the control processer are fed with the same patient signal in the same pre-processing state.

2. The system according to claim 1, further comprising:

an alarming unit, independent of the monitoring processor and the control processor, which is fed with the patient signal in the pre-processing state and which is adapted for providing common alarm conditions for monitoring and controlling.

3. The system according to claim 1, wherein the user interface is adapted for indicating and/or inputting monitoring data and control data.

4. The system according to claim 3, wherein the user interface is adapted for requesting the user to input external data as input data for the closed loop controller.

5. The system according to claim 1, wherein the control processor applies a filtering algorithm to the patient signal to generate the processed data, wherein the filtering algorithm optimizes the patient signal for the integrated closed loop controller.

6. The system according to claim 1, further including an alarming unit which provides a warning in response to the dynamic adjustment of the transfer function model being impossible or of a risk level to the patient exceeding a threshold.

7. A method for monitoring and controlling a patient, said method comprising:

capturing a patient signal with a patient sensor;

processing, by a monitoring processor, the patient signal for a monitoring purpose to generate monitoring data for display on a patient monitor;

displaying the monitoring data on a user interface;

processing, by a control processor independent of the monitoring processor, the patient signal for a control purpose to generate control data, wherein processing the patient signal for the monitoring purpose and processing the patient signal for the control purpose are based on the same patient signal in the same pre-processing state;

feeding a closed loop controller with the control data; and

,

controlling, by the closed loop controller, a patient treatment device for treating the patient, the patient treatment device controlled using a transfer function model of the closed loop controller; and

dynamically adjusting the transfer function model based on deviations between an input target value and an output value of the patient signal, wherein the user is provided with a warning in response to dynamic adjustment of the transfer function model.

8. The method according to claim 7, further comprising:

processing the patient signal in the pre-processing state to determine common alarm conditions for monitoring and controlling, independent of processing the patient signal for the monitoring purpose and processing the patient signal for the control purpose.

9. The method according to claim 7, further comprising:

using a common user interface for indicating and/or inputting monitoring data and control data.

10. The method according to claim 9, further comprising:

requesting a user to input external data required as input data for the closed loop controller via the common user interface.

11. The method according to claim 7, wherein controlling the treatment of the patient is based on an input value, said method further comprising:

comparing the input value to an output value of the captured patient signal; and

,

generating a further action if the output value deviates from an expected output value by more than a predefined amount.

12. The method according to claim 11, wherein the further action is an alarm and/or fallback to an open loop control.

13. The method according to claim 11, wherein the input value is intentionally varied.

14. The method according to claim 7, wherein the user is provided with a warning in response to dynamic adjustment of the transfer function model.

15. The method according to claim 7, wherein the transfer function includes an input, an output, and one or more parameters modeling the relationship between the input and the output, wherein dynamically adjusting the transfer function model includes dynamically adjusting the parameters.

16. The method according to claim 7, further including:

filtering the patient signal in the pre-processed state using a filtering algorithm, wherein the filtering algorithm optimizes the patient signal for the closed loop controller; and

,

feeding the closed loop controller with the filtered patient signal, wherein the closed loop controller controls the treatment of the patient based on the filtered patient signal.

17. A system for monitoring a patient and controlling a patient treatment, said system comprising:

at least one patient sensor which generates one or more patient signals indicative of a plurality of physiological parameters of the patient;

a user interface which displays information on the patient parameters to a user;

a patient treating device which administers a treatment to the patient;

a monitoring processer which processes the patient signal for display and outputs monitoring data to the user interface for display;

a control processer which processes the patient signal concurrently with the monitoring processer for controlling the patient treatment device and outputs control data;

an integrated closed loop controller which receives the control data from the control processor and which controls the patient treating device based on a transfer function model of the integrated controller, the transfer function model dynamically adjusted based on the control data from the control processor;

wherein the user is provided with a warning in response to dynamic adjustment of the transfer function model;

an alarming unit, independent of the monitoring processor and the control processor, which is fed with the patient signal in the same pre-processing state as the control processor and the monitoring processor and which is adapted for providing common alarm conditions for monitoring and controlling.

18. The system according to claim 17, wherein the control processor applies a filtering algorithm to the patient signal in the pre-processed state to generate the control data to adapt the patient signal for the integrated closed loop controller.