INDICATOR FOR FLUID RESUSCITATION

• US 20110237959A1
• Filed: 03/25/2011
• Published: 09/29/2011
• Est. Priority Date: 03/26/2010
• Status: Active Grant

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Drager Medical GmbH (FPS Vermögensverwaltung GmbH)
• Inventors: VAN HOUWELINGEN, Marc
• Granted Patent: US 8,834,379 B2
• Time in Patent Office: Days
• US Class Current: 600/484
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61B 5/091 Measuring volume of inspired or expired gases, e.g. to determine lung capacity
• CPC Class Codes: A61M 16/00 Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes stimulating the respiratory movement by mechanical, pneumatic or electrical means, iron lungs combined with gas breathing means A61H31/00
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0084 self-reinflatable by elasticity, e.g. resuscitation squeeze bags
• CPC Class Codes: A61M 16/021 operated by electrical means A61M16/202 – A61M16/205 take precedence

Abstract

A system for providing an indication of cardiovascular function, includes a respiration input (1) for receiving a respiration-related signal indicative of a physical property of respiration gases administered to a patient. A hemodynamic input (2) is provided for receiving a hemodynamic-related signal indicative of a hemodynamic property. An inspiration detector (3) is provided for processing the respiration-related signal to detect times of inspiration and a measure of the size of the inspiration. A correlator (5) is provided for correlating the sizes of inspiration with the hemodynamic-related signal, to obtain the indication of cardiovascular function. The respiration-related signal is indicative of inspiration pressure, inspiration volume, or inspiration flow. The hemodynamic-related signal is indicative of blood pressure.

Claims

1. A system for providing an indication of cardiovascular function, the system comprising:

a respiration input for receiving a respiration-related signal indicative of a physical property of respiration gases administered to a patient;

a hemodynamic input for receiving a hemodynamic-related signal indicative of a hemodynamic property;

an inspiration detector for processing the respiration-related signal to detect times of inspiration and a measure of a size of inspiration; and

a correlator for correlating the sizes of inspiration with the hemodynamicrelated signal, to obtain the indication of cardiovascular function.

2. A system according to claim 1, wherein the respiration-related signal is indicative of inspiration pressure, inspiration volume, or inspiration flow.

3. A system according to claim 1, wherein the hemodynamic-related signal is indicative of blood pressure.

4. A system according to claim 1, further comprising:

a variance detector for determining a variance in the size of inspiration of successive inspirations; and

a threshold means for comparing the variance of the size of inspiration with a threshold;

wherein the correlator is arranged for obtaining the indication of cardiovascular function only if the variance exceeds the threshold.

5. A system according to claim 4, wherein the system automatically performs the processing, the determining, and the correlating based on newly received data while the respiration-related signal and the hemodynamic-related signal are being received.

6. A system according to claim 1, further comprising a display for displaying the indication of cardiovascular function.

7. A system according to claim 1, wherein the system is arranged for handling a respiration-related signal indicative of nonmonotonically varying sizes of the inspiration in successive inspirations.

8. A system according to claim 1, further comprising:

a device comprising a blood pressure sensor for generating the hemodynamic-related signal and a respiration sensor for generating the respiration-related signal, wherein the respiration sensor is arranged for being in fluid communication with a connector for connecting a measurement hose.

16. A device according to claim 1, further comprising a device for generating the hemodynamic-related signal, wherein the respiration sensor is arranged for being in fluid communication with a connector for connecting a measurement hose.

9. A device for providing mechanical ventilation to a patient, the device comprising

a handbag for manually administering air to a patient;

a respiration related sensor for generating a respiration-related signal indicative of a physical property of respiration gases administered to a patient, wherein the respiration-related signal is for a system for providing an indication of cardiovascular function, the system comprising a respiration input for receiving the respiration-related signal indicative of a physical property of respiration gases administered to a patient, a hemodynamic input for receiving a hemodynamic-related signal indicative of a hemodynamic property, an inspiration detector for processing the respiration-related signal to detect times of inspiration and a measure of a size of inspiration and a correlator for correlating the sizes of inspiration with the hemodynamic related signal, to obtain the indication of cardiovascular function.

10. A device according to claim 9, wherein the respiration-related signal is indicative of inspiration pressure, inspiration volume, or inspiration flow.

11. A device according to claim 10, wherein the hemodynamic-related signal is indicative of blood pressure.

12. A device according to claim 11, wherein the system further comprises:

a variance detector for determining a variance in the size of inspiration of successive inspirations; and

a threshold means for comparing the variance of the size of inspiration with a threshold;

wherein the correlator is arranged for obtaining the indication of cardiovascular function only if the variance exceeds the threshold.

13. A device according to claim 12, wherein the system automatically performs the processing, the determining, and the correlating based on newly received data while the respiration-related signal and the hemodynamic-related signal are being received.

14. A device according to claim 13, further comprising a display for displaying the indication of cardiovascular function.

15. A device according to claim 13, wherein the system is arranged for handling a respiration-related signal indicative of nonmonotonically varying sizes of the inspiration in successive inspirations.

18. A method according to claim 10, further comprising the step of providing a processor system and a computer program product comprising instructions for causing the processor system to perform the steps of receiving the respiration-related signal, receiving the hemodynamic-related signal, processing the respiration-related signal and correlating the sizes of inspiration with the hemodynamic-related signal.

17. A method of providing an indication of cardiovascular function, the method comprising the steps of:

receiving a respiration-related signal indicative of a physical property of respiration gases administered to a patient;

receiving a hemodynamic-related signal indicative of a hemodynamic property;

processing the respiration-related signal to detect times of inspiration and a measure of the size of the inspiration; and

correlating the sizes of inspiration with the hemodynamic-related signal, to obtain the indication of cardiovascular function.