Methods For Validating Patient Identity

• US 20120029317A1
• Filed: 07/28/2010
• Published: 02/02/2012
• Est. Priority Date: 07/28/2010
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Nellcor Puritan Bennett LLC (Medtronic Plc)
• Inventors: Doyle, Peter, Sanborn, Warren, Graboi, Dan, Vandine, Joseph Doug
• Granted Patent: US 8,676,285 B2
• Time in Patent Office: Days
• US Class Current: 600/301
• CPC Class Codes: A61B 2505/03 Intensive care
• CPC Class Codes: A61B 2560/0276 Determining malfunction
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0063 Compressors
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 2205/13 with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2230/06 Heartbeat rate only
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)
• CPC Class Codes: A61M 2230/42 Rate

Abstract

This disclosure describes systems and methods for monitoring a patient on a ventilator-oximeter system. The disclosure describes a novel approach determining if the oximeter and the ventilator are attached to the same patient and if not providing a warning.

Claims

1. A method for monitoring a patient being ventilated by a medical ventilator-oximeter system, the method comprising:

monitoring at least one patient parameter using data gathered by an oximeter;

monitoring the same at least one patient parameter using data gathered by a ventilator independently of the oximeter;

comparing the at least one patient parameter monitored by the oximeter to the same at least one patient parameter monitored by the ventilator; and

executing an alarm to notify an operator of the medical ventilator-oximeter system that an oximeter sensor is not attached to the patient being ventilated by the ventilator when the at least one patient parameter monitored by the oximeter and the ventilator differ by more than a predetermined value.

2. The method of claim 1, wherein the at least one patient parameter monitored by the oximeter and the ventilator is at least one of respiration rate and pulse rate.

3. The method of claim 1, wherein the respiration rate and pulse rate include related phase information.

4. The method of claim 1, wherein the at least one patient parameter is a pulse rate and wherein the pulse rate is monitored by the ventilator by detecting small pressure (flow) fluctuations in the breathing circuit under the influence of a contracting heart of the patient.

5. The method of claim 1, wherein the at least one patient parameter is respiration rate and wherein the respiration rate is monitored by the oximeter using an embedded algorithm that processes frequency of changes in a magnitude of modulation (max-min) of an infrared plethysmorgram.

6. The method of claim 1, wherein the alarm is at least one of audio and visual.

7. The method of claim 1, where in the comparing step is performed upon an operator command.

8. The method of claim 1, further comprising, disarming the alarm upon an operator command.

9. The method of claim 1, wherein the predetermined value is 5 percent.

10. A method for monitoring a patient being ventilated by a medical ventilator-oximeter system, the method comprising:

monitoring a pulse rate of a patient using data gathered by an oximeter;

monitoring the pulse rate of the patient using data gathered by a ventilator independently of the oximeter;

comparing the pulse rate monitored by the oximeter to the pulse rate monitored by the ventilator; and

executing an alarm to notify an operator of the medical ventilator-oximeter system that an oximeter sensor is not attached to the patient being ventilated by the ventilator when the pulse rate monitored by the oximeter and the pulse rate monitored by the ventilator differ by more than a predetermined value.

11. The method of claim 10, further comprising:

monitoring a respiration rate of the patient using data gathered by the oximeter;

monitoring the respiration rate of the patient using data gathered by the ventilator independently of the oximeter; and

comparing the respiration rate monitored by the oximeter to the respiration rate monitored by the ventilator;

wherein the step of executing the alarm further comprises executing the alarm to notify the operator of the medical ventilator-oximeter system that the oximeter sensor is not attached to the patient being ventilated by the ventilator when the pulse rate and the respiration rate monitored by the oximeter and the pulse rate and the respiration rate monitored by the ventilator differ by more than the predetermined value.

12. The method of claim 11, further comprising:

determining that the difference in the pulse rate is about equal to the difference in the respiration rate.

13. The method of claim 11, wherein the respiration rate is monitored by the oximeter using an embedded algorithm that processes frequency of changes in a magnitude of modulation (max-min) of a baseline of an infrared plethysmorgram.

14. The method of claim 10, wherein the predetermined value is 5 percent,

15. The method of claim 10, wherein the comparing step and the monitoring steps are performed upon an operator command.

16. The method of claim 10, further comprising, disarming the alarm upon an operator command.

17. The method of claim 10, wherein the pulse rate is monitored by the ventilator by detecting small pressure (flow) fluctuations in the breathing circuit under the influence of a contracting heart of the patient.

18. A method for monitoring a patient being ventilated by a medical ventilator-oximeter system, the method comprising:

monitoring a respiration rate of a patient using data gathered from an oximeter;

monitoring the respiration rate of the patient using data gathered by a ventilator independently of the oximeter;

comparing the respiration rate monitored by the oximeter to the respiration rate monitored by the ventilator; and

executing an alarm to notify an operator of the medical ventilator-oximeter system that an oximeter sensor is not attached to the patient being ventilated by the ventilator when the respiration rate monitored by the oximeter and the respiration rate monitored by the ventilator differ by more than a predetermined value.

19. The method of claim 18, wherein the predetermined value is 5 percent.

20. A medical ventilator-oximeter system, comprising:

a ventilator, the ventilator comprising

a processor,

a pneumatic gas delivery system controlled by the processor, the pneumatic gas delivery system adapted to control a flow of gas from a gas supply to a patient via a ventilator breathing circuit,

at least one sensor in communication with the processor, data from the at least one sensor is utilized to determine a respiration rate of the patient, and

a cardiac oscillation detector in communication with the processor, data from the cardiac oscillation detector is utilized to determine a pulse rate of the patient;

an oximeter operatively coupled to the ventilator, comprising,

an oximeter sensor in communication with the processor,

a pulse rate module in communication with the processor, and

an infrared plethysmorgram module in communication with the processor;

a comparing module, the comparing module compares at least one patient parameter monitored by using oximeter data to the same at least one patient parameter monitored independently by using ventilator data;

an alarm module, the alarm module executes an alarm when the at least one patient parameter monitored by using the oximeter data and the same at least one patient parameter monitored by using the ventilator data differ by more than a predetermined value; and

a display module controlled by the processor, the display module is adapted to display an executed alarm.

21. The medical ventilator of claim 20, wherein the compared at least one patient parameter monitored using the oximeter data and the ventilator data is at least one of respiration rate and pulse rate.

22. A computer-readable medium having computer-executable instructions for performing a method for monitoring a patient being ventilated by a medical ventilator-oximeter system, the method comprising:

repeatedly monitoring at least one patient parameter with an oximeter and with a ventilator independently of the oximeter;

repeatedly comparing the at least one patient parameter monitored by the oximeter to the at least one patient parameter monitored by the ventilator;

determining that the at least one patient parameter monitored by the oximeter differs from the at least one parameter monitored by the ventilator by more than a predetermined value; and

executing an alarm after the step of determining that the at least one patient parameter monitored by the oximeter differs from the at least one parameter monitored by the ventilator by more than a predetermined value.

23. A medical ventilator-oximeter system, comprising:

means for repeatedly monitoring at least one patient parameter with an oximeter and with a ventilator independently of the oximeter;

means for repeatedly comparing the at least one patient parameter monitored by the oximeter to the at least one patient parameter monitored by the ventilator;

means for determining that the at least one patient parameter monitored by the oximeter differs from the at least one parameter monitored by the ventilator by more than a predetermined value; and

means for executing an alarm after the step of determining that the at least one patient parameter monitored by the oximeter differs from the at least one parameter monitored by the ventilator by more than a predetermined value.