PERSONALIZED FLUID ASSESSMENT

• US 20090281434A1
• Filed: 05/08/2008
• Published: 11/12/2009
• Est. Priority Date: 05/08/2008
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Messerges, Joanne Lynn
• Granted Patent: US 8,128,570 B2
• Time in Patent Office: Days
• US Class Current: 600/485
• CPC Class Codes: A61B 5/02 Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
• CPC Class Codes: A61B 5/08 Detecting, measuring or recording devices for evaluating the respiratory organs A61B5/0205 takes precedence
• CPC Class Codes: G09B 23/12 of liquids or gases
• CPC Class Codes: G09B 23/288 for artificial respiration or heart massage
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders

Abstract

A system and method of monitoring the fluid status of a patient. The system may include a patient monitor that receives blood pressure data. A first fluid model receives the blood pressure data, and a personalized fluid model is derived from the application of the blood pressure data to the first fluid model. An estimation of the patient'"'"'s fluid status may be derived from the personalized fluid model. The method may include the steps of measuring a first blood pressure value, creating a personalized fluid model, measuring a second blood pressure value, applying the second blood pressure value to the personalized fluid model; and deriving an estimation of the fluid status of the patient.

Claims

1. A method of estimating the fluid status of a patient, the method comprising the steps of:

obtaining a fluid model;

acquiring first blood pressure data from the patient;

creating a personalized fluid model for the patient by calibrating the fluid model to reflect the first blood pressure data;

acquiring a second blood pressure data;

applying the acquired second blood pressure data to the personalized fluid model; and

producing an estimated patient fluid status.

2. The method of claim 1 further comprising obtaining first additional patient information wherein the personalized fluid model reflects the first blood pressure value and the first additional patient information.

3. The method of claim 2 wherein the first blood pressure data is first dynamic blood pressure data and the second blood pressure data is second dynamic blood pressure data.

4. The method of claim 2, wherein the first additional patient information is an indication of the application of positive pressure ventilation to the patient.

5. The method of claim 3, wherein the fluid model comprises at least one personalization constant and the step of creating the personalized fluid model includes deriving the value of at least one personalization constant.

6. The method of claim 5, wherein the value of the personalization constant is derived using the first additional patient information and the first blood pressure data.

7. The method of claim 6, wherein the personalization constant is a mathematical value of a parameter from the fluid model.

8. The method of claim 7, wherein the personalization constant is a physiological compliance.

9. The method of claim 5, further comprising the steps of:

obtaining second additional patient information;

deriving at least one updated personalization constant from the second additional patient information; and

applying the at least one updated personalization constant to the personalized fluid model.

10. The method of claim 9, wherein the second additional patient information is indicative of the application of positive pressure ventilation to the patient.

11. The method of claim 3 wherein the first blood pressure data comprises first systolic pressure variation data and the second blood pressure data comprises second systolic pressure variation.

12. The method of claim 11, wherein the new value of the constant is based upon the second additional patient information.

13. A fluid status estimation system, the system comprising:

a patient monitor connected to a patient to receive first blood pressure data and second blood pressure data;

a first fluid model that receives the first blood pressure data from the patient monitor and uses the first blood pressure to derive at least one personalization constant; and

a personalized fluid model comprising the at least one personalization constant that receives the second blood pressure data from the patient monitor, and uses the second blood pressure data to produce an estimate of patient fluid status.

14. The fluid status estimation system of claim 13 wherein the first and second blood pressure data comprises dynamic blood pressure data.

15. The fluid status estimation system of claim 14 wherein the first fluid model further receives first additional patient information, the personalized fluid model being further derived from the application of the first additional patient information to the first fluid model.

16. The fluid status estimation system of claim 15 further comprising a personalization constant updater, the personalization constant updater receiving second additional patient information and deriving at least one personalization constant update, the at least one personalization constant update being applied to the personalized fluid model.

17. A system for estimating the fluid status of a patient, the system comprising:

a patient monitor connected to the patient and at least one additional medical device, the patient monitor receiving first blood pressure data and updated blood pressure data from the patient and receiving first additional patient information and second additional patent information from the at least one additional medical device;

a first fluid model that receives the first blood pressure data and first additional patient information from the patient monitor, the first fluid model being used with the first blood pressure data and the first additional patient information to derive at least one personalization constant;

a personalization constant updater that receives the second additional patient information from the patient monitor and calculates an updated value of the at least one personalization constant; and

a personalized fluid model comprising the at least one personalization constant, the personalized fluid model receiving the updated value and replacing the at least one personalization constant with the updated value.

18. The system of claim 17 wherein the patient monitor receives second blood pressure data from the patient and transmits the second blood pressure data to the personalized fluid model, the second blood pressure data being applied to the personalized fluid model to derive an estimation of the fluid status of the patient.

19. The system of claim 18 further comprising a physiological database comprising additional patient specific information, and wherein the first fluid model receives the additional patient specific information from the physiological database, and the at least one personalization constant being further derived from the application of the additional patient specific information to the first fluid model.

20. The system of claim 18 further comprising a graphical display that receives the estimation of the fluid status of the patient and visually presents the estimation of the fluid status of the patient.