Patient hydration system with abnormal condition sensing

• US 20060235353A1
• Filed: 04/21/2006
• Published: 10/19/2006
• Est. Priority Date: 09/09/2004
• Status: Active Grant

• Current Assignee: PLC Medical Systems, Inc. (Viveve Medical, Inc.)
• Original Assignee: PLC Medical Systems, Inc. (Viveve Medical, Inc.)
• Inventors: Levin, Howard R., Gelfand, Mark
• Granted Patent: US 7,837,667 B2
• Time in Patent Office: Days
• US Class Current: 604/66
• CPC Class Codes: A61B 5/201 Assessing renal or kidney functions
• CPC Class Codes: A61B 5/208 adapted to determine urine quantity, e.g. flow, volume
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3355 Controlling downstream pump pressure
• CPC Class Codes: A61M 2205/3393 by weighing the reservoir
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/16895 by monitoring weight change, e.g. of infusion container
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: G01G 17/04 for weighing fluids, e.g. gases, pastes

Abstract

A patient hydration system and method wherein hydration fluid is administered to a patient and the patient'"'"'s urine output is measured either by weight or some other suitable way. A controller is responsive to the patient'"'"'s urine output measurement and configured to control the infusion rate to hydrate the patient based on the patient'"'"'s urine output. The controller also detects abnormal patient urine output measurements and initiates corrective action in response.

Claims

1. A patient hydration system comprising:

an infusion device for administering hydration fluid to a patient;

a patient urine output measurement device; and

a controller, responsive to the patient urine output measurement device, configured to;

control the infusion device to hydrate the patient based on the patient'"'"'s urine output,

detect abnormal patient urine output measurements, and

take corrective action in response to an abnormal patient urine output measurement.

2. The system of claim 1 in which an abnormal patient urine output measurement is indicative of a sharply varying urine output and the controller is programmed to:

control the infusion device to hydrate the patient at a preset minimum infusion rate, and

hydrate the patient at an increased rate after the abnormal patient urine output measurement to achieve a predetermined hydration balance.

3. The system of claim 2 in which the patient urine output measurement device includes a urine weight measurement device responsive to a reservoir of urine output by the patient.

4. The system of claim 3 in which an abnormal patient urine output measurement is indicative of a urine reservoir weight which varies sharply over a predetermined time period.

5. The system of claim 3 in which the urine weight measurement device includes a strain gauge responsive to an attachment from which the urine reservoir hangs.

6. The system of claim 1 further including a reservoir of urine output by the patient and an abnormal patient urine output is indicative of a urine reservoir that has been at least partially emptied.

7. The system of claim 6 in which the controller is programmed to control the operation of the infusion device based on the patient'"'"'s urine output before and after the urine reservoir was at least partially emptied to achieve a predetermined hydration balance.

8. The system of claim 1 in which the corrective action includes the controller generating an alarm signal.

9. The system of claim 1 including a hydration fluid measurement subsystem.

10. The system of claim 9 in which the controller is responsive to the hydration fluid measurement subsystem and is configured to:

detect abnormal hydration fluid measurements, and

take corrective action in response to an abnormal hydration fluid measurement.

11. The system of claim 10 in which the hydration fluid measurement subsystem includes a weight measurement device responsive to a source of hydration fluid.

12. The system of claim 11 in which an abnormal hydration fluid measurement is indicative of a source of hydration fluid which has been jostled.

13. The system of claim 12 in which the corrective action is the generation of an alarm signal.

14. The system of claim 11 in which an abnormal hydration fluid measurement is indicative of a replacement of the source of hydration fluid.

15. The system of claim 14 in which the corrective action is the generation of an alarm signal.

16. The system of claim 1 in which the infusion device is a pump.

17. A patient hydration system comprising:

an infusion device for administering hydration fluid to a patient;

a hydration fluid measurement subsystem;

a patient urine output measurement device; and

a controller, responsive to the hydration fluid measurement subsystem and the patient urine output measurement device, configured;

to control the infusion device, in response to the patient urine output measurement device, to hydrate the patient based on the patient'"'"'s urine output,

to detect abnormal hydration fluid measurements, and

to take corrective action in response to an abnormal hydration fluid measurement.

18. A patient hydration system comprising:

an infusion device for administering hydration fluid to a patient;

a hydration fluid measurement subsystem;

a patient urine output measurement device; and

a controller, responsive to the hydration fluid measurement subsystem and the patient urine output measurement device, and configured;

to control the infusion device to hydrate the patient based on the patient'"'"'s urine output,

to detect abnormal hydration fluid and urine output measurements, and

to take corrective action in response to an abnormal hydration fluid and/or urine output measurement.

19. A fluid management system for a patient injected with a contrast agent, the system comprising:

a console for mounting on an IV pole;

a first attachment mechanism extending from the console for hanging a urine collection chamber;

a first weighing device associated with the console and responsive to the first attachment;

a second attachment extending from the console for hanging a source of hydration fluid;

a second weighing device associated with the console and responsive to the second attachment for weighing the source of hydration fluid;

an infusion pump integrated with the console and configured to pump hydration fluid from the source of hydration fluid to the patient; and

a controller in the console, responsive to the first and second weighing devices, and configured to;

control the infusion pump to hydrate the patient based on the patient'"'"'s urine output to prevent radiocontrast nephropathy,

detect abnormal patient urine output weight measurements,

take corrective action in response to an abnormal patient urine output weight measurement,

detect abnormal hydration fluid weight measurements, and

take corrective action in response to an abnormal hydration fluid weight measurement.

20. A patient hydration method comprising:

administering hydration fluid to a patient;

measuring the patient'"'"'s urine output;

controlling the infusion rate to hydrate the patient based on the patient'"'"'s urine output;

detecting abnormal patient urine output measurements; and

taking corrective action in response to an abnormal patient urine output measurement.

21. The method of claim 20 in which an abnormal patient urine output measurement is indicative of a sharply varying urine output and the corrective action is:

administering hydration fluid at a preset minimum infusion rate, and

administering hydration fluid at an increased rate after the abnormal patient urine output measurement to achieve a predetermined hydration balance.

22. The method of claim 21 in which measuring the patient'"'"'s urine output includes weighing a reservoir of urine output by the patient.

23. The method of claim 22 in which an abnormal patient urine output measurement is indicative of a urine reservoir weight which varies sharply over a predetermined time period.

24. The method of claim 20 in which there is a reservoir of urine output by the patient and an abnormal patient urine output is indicative of a urine reservoir that has been at least partially emptied.

25. The method of claim 24 in which hydration fluid is administered based on the patient'"'"'s urine output before and after the urine reservoir was at least partially emptied to achieve a predetermined hydration balance.

26. The method of claim 20 in which the corrective action includes generating an alarm signal.

27. The method of claim 20 further including measuring the hydration fluid administered.

28. The method of claim 27 in which an abnormal hydration fluid measurement is detected and corrective action is taken in response to an abnormal hydration fluid measurement.

29. The method of claim 28 in which a source of hydration fluid is weighed to measure the hydration fluid administered.

30. The method of claim 29 in which an abnormal hydration fluid measurement is indicative of a source of hydration fluid which has been jostled.

31. The method of claim 30 in which the corrective action is the generation of an alarm signal.

32. The method of claim 29 in which an abnormal hydration fluid measurement is indicative of a replacement of the source of hydration fluid.

33. The method of claim 32 in which the corrective action is the generation of an alarm signal.

34. A patient hydration method comprising:

administering hydration fluid to a patient;

measuring the hydration fluid administered to the patient;

measuring the patient'"'"'s urine output;

hydrating the patient based on the patient'"'"'s urine output;

detecting abnormal hydration fluid measurements; and

taking corrective action in response to an abnormal hydration fluid measurement.

35. A patient hydration method comprising:

administering hydration fluid to a patient;

measuring the hydration fluid administered to the patient;

measuring the patient'"'"'s urine output;

hydrating the patient based on the patient'"'"'s urine output;

detecting abnormal hydration fluid and urine output measurements; and

taking corrective action in response to an abnormal hydration fluid and/or urine output measurement.

36. A fluid management method for a patient injected with a contrast agent, the method comprising:

weighing a urine collection chamber;

weighing a source of hydration fluid;

administering hydration fluid from the source of hydration fluid to the patient;

hydrating the patient based on the weight of urine collection chamber to prevent radiocontrast nephropathy;

detecting abnormal patient urine output weight measurements;

taking corrective action in response to an abnormal patient urine output weight measurement;

detecting abnormal hydration fluid weight measurements; and

taking corrective action in response to an abnormal hydration fluid weight measurement.