Method for respiration rate and blood pressure alarm management

• US 8,761,854 B2
• Filed: 07/09/2013
• Issued: 06/24/2014
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Coviden LP
• Inventors: Price, Thomas, Kadlec, Ron J.
• Primary Examiner(s): Laballe, Clayton E
• Assistant Examiner(s): RHODES, JR, LEON W
• Application Number:
  US13/937,388
• Publication Number:
  US 20130296675A1
• Time in Patent Office: 350 Days
• Field of Search: 600/484, 600/324, 600/326
• US Class Current: 600/324
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02125 of pulse wave propagation time
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/726 using Wavelet transforms

Abstract

Embodiments of the present disclosure relate to display features that facilitate observation of monitored physiological data. According to certain embodiments, a monitoring system may include a monitor capable of receiving data related to the physiological parameters and storing data related to the parameters. The monitor may include a microprocessor configured to determine a blood pressure baseline from the data and to establish an alarm sensitivity for blood pressure based on the blood pressure baseline. The alarm sensitivity may comprise a first tier, a second tier, a third tier, and a fourth tier, and each tier may correspond to a blood pressure range. The alarm sensitivity may relate to an acceptable percent shift of the blood pressure from the blood pressure baseline, and the acceptable percent shift for at least one of the tiers is different from the acceptable percent shift of another one of the tiers.

Claims

1. A method, comprising:

receiving an input from a sensor relating to one or more physiological parameters;

determining a blood pressure baseline from the input; and

establishing an alarm sensitivity for blood pressure based on the blood pressure baseline, wherein the alarm sensitivity comprises a first tier corresponding to a normal blood pressure range, a second tier corresponding to a pre-hypertensive blood pressure range, a third tier corresponding to a stage 1 high blood pressure range, and a fourth tier corresponding to a stage 2 high blood pressure range, wherein the alarm sensitivity relates to an acceptable percent shift of the blood pressure from the blood pressure baseline that if exceeded triggers an alarm, and the acceptable percent shift for at least one of the tiers is different from the acceptable percent shift of another one of the tiers.

2. The method of claim 1, comprising:

determining a blood pressure from the input; and

measuring a percent shift of the blood pressure from the blood pressure baseline.

3. The method of claim 2, wherein the input is a pulse oximetry signal and determining the blood pressure comprises deriving a differential pulse transit time from the pulse oximetry signal.

4. The method of claim 2, comprising triggering the alarm if the percent shift exceeds the established alarm sensitivity.

5. The method of claim 2, comprising triggering the alarm if the percent shift exceeds the established alarm sensitivity for a predetermined amount of time.

6. The method of claim 1, wherein the alarm sensitivity is selected based on which blood pressure range encompasses the blood pressure baseline.

7. The method of claim 1, wherein the normal blood pressure range comprises a systolic blood pressure no greater than 119 mmHg and a diastolic blood pressure no greater than 80 mmHg.

8. The method of claim 1, comprising triggering the alarm when the blood pressure is within the normal blood pressure range.

9. A monitoring system, comprising:

a sensor configured to sense patient physiological parameters; and

a monitor configured to receive an input from the sensor related to the patient physiological parameters, the monitor comprising;

one or more processors configured to;

determine a blood pressure baseline from the input; and

establish an alarm sensitivity based on the blood pressure baseline, wherein the alarm sensitivity comprises at least one tier corresponding to a normal blood pressure range and at least one tier corresponding to a high blood pressure range, and the alarm sensitivity is selected based on which blood pressure range encompasses the blood pressure baseline, wherein the alarm sensitivity relates to an acceptable percent shift of the blood pressure from the blood pressure baseline that if exceeded triggers an alarm, and the acceptable percent shift for the at least one tier corresponding to the normal blood pressure range is different from the acceptable percent shift of the at least one tier corresponding to the high blood pressure range.

10. The system of claim 9, wherein the sensor comprises a pulse oximeter sensor.

11. The system of claim 9, wherein the normal blood pressure range comprises a systolic blood pressure no greater than 119 mmHg and a diastolic blood pressure no greater than 80 mmHg.

12. The system of claim 9, wherein the one or more processors are configured to:

determine a blood pressure from the input; and

measure a percent shift of the blood pressure from the blood pressure baseline.

13. The system of claim 12, wherein the system is configured to trigger an alarm if the percent shift exceeds the established alarm sensitivity when the blood pressure is within the normal blood pressure range.

14. The system of claim 9, wherein the blood pressure baseline comprises a systolic blood pressure baseline and a diastolic blood pressure baseline, and wherein the alarm sensitivity comprises a first alarm sensitivity based on the systolic blood pressure baseline and a second alarm sensitivity based on the diastolic blood pressure baseline.

15. A monitor, comprising:

a connector port configured to receive input from a sensor related to patient physiological parameters; and

one or more processors configured to;

determine a systolic blood pressure baseline and a diastolic blood pressure baseline from the input; and

establish a first alarm sensitivity for systolic blood pressure based on the systolic blood pressure baseline and a second alarm sensitivity for diastolic blood pressure based on the diastolic blood pressure baseline, wherein the first and the second alarm sensitivities comprise multiple tiers, wherein the first alarm sensitivity relates to an acceptable percent shift of the systolic blood pressure from the systolic blood pressure baseline that if exceeded triggers an alarm and the second alarm sensitivity relates to an acceptable percent shift of the diastolic blood pressure from the diastolic blood pressure baseline that if exceeded triggers an alarm, and the acceptable percent shift for the at least one of the multiple tiers is different from the acceptable percent shift of at least one other tier of the multiple tiers.

16. The monitor of claim 15, wherein the first alarm sensitivity comprises at least one tier corresponding to a normal systolic blood pressure and at least one tier corresponding to a high systolic blood pressure, and the second alarm sensitivity comprises at least one tier corresponding to a normal diastolic blood pressure and at least one tier corresponding to a high diastolic blood pressure.

17. The monitor of claim 16, wherein the first alarm sensitivity is selected based on which systolic blood pressure range encompasses the systolic blood pressure baseline and the second alarm sensitivity is selected based on which diastolic blood pressure range encompasses the diastolic blood pressure baseline.

18. The monitor of claim 16, wherein the monitor is configured to trigger an alarm if a measured percent shift of the systolic blood pressure exceeds the first alarm sensitivity when the systolic blood pressure is within the normal systolic blood pressure rate range.

19. The monitor of 15, wherein the one or more microprocessors are configured to:

determine a systolic blood pressure and a diastolic blood pressure from the input; and

measure a percent shift of the systolic blood pressure from the systolic blood pressure baseline and of the diastolic pressure from the diastolic blood pressure baseline.

20. The monitor of claim 19, comprising a display, wherein the display is configured to display one or more graphical indicators comprising the systolic blood pressure, the diastolic blood pressure, the systolic blood pressure baseline, the diastolic blood pressure baseline, the first alarm sensitivity, the second alarm sensitivity, the percent shift of the systolic blood pressure from the systolic blood pressure baseline, the percent shift of the diastolic blood pressure from the diastolic blood pressure baseline, or any combination thereof.