Method for influencing the pressure within a heating bag during a medical treatment and medical apparatus

Patent metadata

Field	Value
Publication number	US-9649421-B2
Application number	US-201414916495-A
Country	US
Kind code	B2
Filing date	Sep 5, 2014
Priority date	Sep 6, 2013
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A method for controlling or regulating the pressure, which prevails within a heating bag of a tubing system used for the treatment, wherein the method encompasses the steps: Determining the pressure; comparing the determined pressure with a reference pressure or detecting its state with respect to a reference pressure range and changing a treatment parameter of the treatment of the patient or suggesting a correction of the treatment parameter in case the determined pressure is below or above, respectively, the reference pressure or outside the reference pressure range.

First claim

The invention claimed is:

1. A method for regulating or controlling, during a treatment of blood of a patient, a pressure which prevails within a heating bag of a tubing system used for the treatment, the method comprising:
determining the pressure;
comparing the determined pressure to a reference pressure or detecting the determined pressure's state with respect to a reference pressure range; and
avoiding a collapse of the heating bag by changing at least one treatment parameter of the treatment of the patient or suggesting a correction or change of the at least one treatment parameter when the determined pressure is below or above the reference pressure, or is outside of the reference pressure range.

2. The method according to claim 1 , wherein determining the pressure is achieved by measuring with or via a pressure sensor.

3. The method according to claim 1 , wherein the at least one treatment parameter of the treatment is a substitution flow or an ultrafiltration rate.

4. The method according to claim 2 , wherein the at least one treatment parameter of the treatment is a substitution flow or an ultrafiltration rate.

5. The method according to claim 3 , wherein the substitution flow is reduced such that or until the determined pressure is above or below the reference pressure, or again reaches within the reference pressure range.

6. The method according to claim 4 , wherein the substitution flow is reduced such that or until the determined pressure is above or below the reference pressure, or again reaches within the reference pressure range.

7. The method according to claim 1 , wherein the reference pressure is ambient pressure.

8. The method according to claim 5 , wherein the reference pressure is ambient pressure.

9. The method according to claim 1 , wherein the pressure is determined by a pressure detector arranged in a dialysis fluid line of the tubing system downstream of a dialysis fluid pump.

10. The method according to claim 7 , wherein the pressure is determined by a pressure detector arranged in a dialysis fluid line of the tubing system downstream of a dialysis fluid pump.

11. The method according to claim 1 , further comprising effecting or manipulating the determined pressure by a device arranged upstream of a dialyzer and downstream of a heating device, wherein the device is a valve, a throttle or an orifice.

12. The method according to claim 7 , further comprising effecting or manipulating the determined pressure by a device arranged upstream of a dialyzer and downstream of a heating device, wherein the device is a valve, a throttle or an orifice.

13. The method according to claim 1 , wherein the pressure is determined by a pressure detector arranged in a substituate line of the tubing system downstream of a substituate pump.

14. The method according to claim 7 , wherein the pressure is determined by a pressure detector arranged in a substituate line of the tubing system downstream of a substituate pump.

15. The method according to claim 1 , wherein the heating bag contains dialysis fluid or substituate.

16. The method according to claim 9 , wherein the heating bag contains dialysis fluid or substituate.

17. A medical apparatus comprising a control or regulating device for controlling or regulating, during a treatment of blood of a patient, a pressure which prevails within a heating bag of a tubing system used for the treatment, the control or regulating device configured to:
determine the pressure;
compare the determined pressure to a reference pressure or detect the determined pressure's state with respect to a reference pressure range; and
avoid a collapse of the heating bag by changing at least one treatment parameter of the treatment or suggesting a correction or change of the at least one treatment parameter when the determined pressure is below or above the reference pressure, or is outside of the reference pressure range.

18. The medical apparatus according to claim 17 , wherein the medical apparatus is a blood purification device or a dialysis device.

19. An extracorporeal blood treatment method comprising:
determining a pressure within a medical fluid heating bag;
comparing the determined pressure to a reference pressure or a reference pressure range; and
avoiding a collapse of the heating bag by changing at least one treatment parameter of the extracorporeal blood treatment method of the patient or suggesting a change of the at least one treatment parameter when the determined pressure is below or above the reference pressure or is outside of the reference pressure range.

Assignees

• Fresenius Medical Care Deutschland Gmbh

Inventors

• Klewinghaus Jürgen

Classifications

• A61M2205/3331

  Pressure; Flow · CPC title

• A61M1/166 Primary

  Heating (for sterilisation A61M1/1686) · CPC title

• A61M1/167

  Flexible packaging for solid concentrates · CPC title

• A61M1/3441

  Substitution rate control as a function of the ultrafiltration rate · CPC title

• A61M2205/36

  related to heating or cooling · CPC title