METHOD AND SYSTEM FOR AUTOMATED MEASUREMENT OF PULSUS PARADOXUS

• US 20100106030A1
• Filed: 10/22/2009
• Published: 04/29/2010
• Est. Priority Date: 10/23/2008
• Status: Abandoned Application

• Current Assignee: Los Angeles Biomedical Research Institute At Harbor-Ucla Medical Center (University of California)
• Original Assignee: Los Angeles Biomedical Research Institute At Harbor-Ucla Medical Center (University of California)
• Inventors: Mason, Gregory R.
• Application Number:
  US12/604,346
• Publication Number:
  US 20100106030A1
• Time in Patent Office: Days
• US Class Current: 600/493
• CPC Class Codes: A61B 5/02208 using the Korotkoff method
• CPC Class Codes: A61B 5/025 within occluders, e.g. responsive to Korotkoff sounds electric stethoscopes A61B7/04

Abstract

A method and system for automatically detecting pulsus paradoxus. In one embodiment, the method includes automatically detecting pulsus paradoxus based upon a consideration of a blood pressure component, an audio component indicative of Korotkoff sounds and a respiratory component. The system includes a plurality of input modules for determining a blood pressure, a Korotkoff sound and a respiration of a subject. The system further includes a computing device coupled to the input modules for automatically determining a presence of pulsus paradoxus based on the blood pressure, the Korotkoff sound and the respiration of the subject.

Claims

1. A method comprising:

automatically detecting by a computing device pulsus paradoxus based upon a consideration of a blood pressure and a Korotkoff sound of a subject.

2. The method of claim 1, wherein automatically detecting further comprises considering a respiratory cycle of the patient.

3. The method of claim 1, wherein automatically detecting further comprises considering fluctuations in regional blood volume of the subject.

4. The method of claim 1, wherein automatically detecting comprises:

determining a first blood pressure at which intermittent Korotkoff sounds occur;

determining a second blood pressure at which continuous Korotkoff sounds occur; and

determining whether a difference between the first blood pressure and the second blood pressure is at least 10 mmHg.

5. The method of claim 1, further comprising:

detecting pulsus paradoxus by detecting a disappearance of Korotkoff sounds during inspiration of the subject.

6. The method of claim 1, further comprising:

comparing an oscillation of a plethysmographic waveform from a baseline to a respiratory cycle length.

7. The method of claim 1, further comprising engaging an alarm when pulsus paradoxus is detected.

8. A system comprising:

a first module for determining a blood pressure of a subject;

a second module for differentiating intermittent and continuous Korotkoff sounds of the subject; and

a computing device coupled to the first module and the second module for automatically determining a presence of pulsus paradoxus based on the blood pressure and the Korotkoff sounds of the subject.

9. The system of claim 8, further comprising:

a third module coupled to the computing device for determining a respiratory cycle of the subject.

10. The system of claim 8, further comprising:

a fourth module coupled to the computing device for determining fluctuations in regional blood volume of the subject.

11. The system of claim 8, wherein the computing device comprises a signal conditioning device to process data from the first module and the second module.

12. The system of claim 8, wherein the computing device comprises a display capable of displaying for viewing information associated with the blood pressure and Korotkoff sounds of the subject.

13. The system of claim 8, wherein the computing device comprises an alerting module to automatically notify a health care provider of the presence of pulsus paradoxus.

14. A machine readable medium containing a set of instructions that when executed cause a computing device to perform a method comprising:

automatically detecting by a computing device pulsus paradoxus based upon a consideration of a blood pressure and a Korotkoff sound of a subject.

15. The machine readable medium of claim 14, wherein automatically detecting further comprises considering a respiratory cycle of the patient.

16. The machine readable medium of claim 14, wherein automatically detecting further comprises considering fluctuations in regional blood volume of the subject.

17. The machine readable medium of claim 14, wherein automatically detecting comprises:

determining a first blood pressure at which intermittent Korotkoff sounds occur;

determining a second blood pressure at which continuous Korotkoff sounds occur; and

determining whether a difference between the first blood pressure and the second blood pressure is at least 10 mmHg.

18. The machine readable medium of claim 14, wherein the method further comprises:

detecting pulsus paradoxus by detecting a disappearance of Korotkoff sounds during inspiration of the subject.

19. The machine readable medium of claim 14, wherein the method further comprises:

comparing an oscillation of a plethysmographic waveform from a baseline to a respiratory cycle length.

20. The machine readable medium of claim 14, further comprising engaging an alarm when pulsus paradoxus is detected.