Method for controlling a blood treatment apparatus and apparatuses

Patent metadata

Field	Value
Publication number	US-10449285-B2
Application number	US-201414905431-A
Country	US
Kind code	B2
Filing date	Jul 15, 2014
Priority date	Jul 15, 2013
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

The present invention relates to a method for controlling a blood treatment apparatus, with the conveying of blood using a blood pump, with the patient venous tubing clamp closed, until a predetermined volume of fluid has passed out of the blood tubing set through the membrane and into the dialysis fluid chamber. It also relates to a control and regulating apparatus and a treatment apparatus. It further relates to a computer program, a computer program product and a digital storage medium.

First claim

The invention claimed is:

1. A method for at least one of controlling or regulating a blood treatment apparatus having a blood pump for conveying blood inside an extra-corporeal blood tubing set, the extra-corporeal blood tubing set comprising or connected with (i) an arterial section having an arterial needle and an arterial patient tubing clamp, (ii) a venous section having a venous needle and a venous patient tubing clamp, and (iii) a blood filter arranged between the arterial section and the venous section, the blood filter having a membrane which separates a blood chamber from a dialysis fluid chamber, the method comprising:
conveying fluid into the extra-corporeal blood tubing set to prime the extra-corporeal blood tubing set;
while: (i) the extra-corporeal blood tubing set contains the fluid, (ii) the arterial and venous needles are connected to a patient's vascular system, (iii) the arterial patient tubing clamp is open, and (iv) the venous patient tubing clamp is closed, conveying with a pump, such as the blood pump or an ultra-filtration pump, a portion of the fluid through the membrane and into the dialysis fluid chamber;
after the conveying, performing a blood treatment of the patient by opening the venous patient tubing clamp and circulating, through the extra-corporeal blood tubing set and the patient's vascular system, the fluid remaining in the extra-corporeal blood tubing and blood of the patient; and
correcting a fluid balance of the patient by, during a first time period of the circulating, outputting a control instruction to the blood treatment apparatus to filter with an ultra-filtration rate that is higher or lower than during a second time period of the circulating following the first time period.

2. The method according to claim 1 , wherein the portion of the fluid is conveyed until a predetermined fluid volume has passed into the dialysis fluid chamber or at least until a sensor signal transmits or detects that blood has reached a predetermined location.

3. The method according to claim 2 , further comprising:
reducing or stopping the conveying of the portion of the fluid after the predetermined fluid volume has passed into the dialysis fluid chamber or at least when the sensor signal transmits that blood has reached the predetermined location.

4. The method according to claim 2 , wherein the fluid is a priming solution, wherein the priming solution is conveyed via the blood pump out of the arterial section through the membrane and into the dialysis fluid chamber.

5. The method according to claims 1 , wherein the predetermined fluid volume corresponds to a total volumetric capacity of the extra-corporeal blood tubing set.

6. The method according to claim 1 , wherein the ultra-filtration rate is higher during the first time period than during the second time period.

7. The method according to claim 1 , wherein the ultra-filtration rate is lower during the first time period than during the second time period.

8. The method according to claim 6 , wherein the control instruction causes the ultra-filtration rate to decrease in the first time period.

9. The method according to claim 7 , wherein the control instruction causes the ultra-filtration rate to decrease in the first time period.

10. The method according to claim 6 , wherein, during the first time period, a volume is filtered through the membrane which is higher than a volume which is filtered through the membrane during the second time period by a volume capacity of the blood chamber and the venous section.

11. The method according to claim 7 , wherein, during the first time period, a volume is filtered through the membrane which is higher than a volume which is filtered through the membrane during the second time period by a volume capacity of the blood chamber and the venous section.

12. The method according to claim 8 , wherein, during the first time period, a volume is filtered through the membrane which is higher than a volume which is filtered through the membrane during the second time period by a volume capacity of the blood chamber and the venous section.

13. The method according to claim 9 , wherein, during the first time period, a volume is filtered through the membrane which is higher than a volume which is filtered through the membrane during the second time period by a volume capacity of the blood chamber and the venous section.

14. The method according to claim 1 , further comprising:
determining a plasma water portion in the blood at a first point of time at a start of the blood treatment and at a second point of time at an end of the blood treatment;
outputting a control instruction to the blood treatment apparatus to filter with a first ultra-filtration rate between the first point of time and the second point of time;
optionally determining a volume filtered at the first ultra-filtration rate based at least on a determining of the plasma water portion at a time point between the first point of time and the second point of time; and
administering an additional fluid into the extra-corporeal blood tubing set or into the patient's vascular system at a further time point between the first point of time and the second point of time.

15. The method according to claim 14 , wherein the additional fluid is administered such that, at the second point of time, the plasma water portion or a fraction of the blood assumes a predetermined value or lies within a predetermined range of values.

16. The method according to claim 14 , further comprising:
determining a blood volume of the patient at the second point of time.

17. A control or regulating apparatus cooperating with the blood treatment apparatus and arranged or configured to carry out the method according to claim 1 .

18. A blood treatment apparatus comprising:
the control or regulating apparatus according to claim 17 .

19. The blood treatment apparatus according to claim 18 , wherein the blood treatment apparatus is arranged for dialysis, acute dialysis, chronic dialysis or aquapheresis.

Assignees

• Fresenius Medical Care Deutschland Gmbh

Inventors

• Chamney Paul
• Kopperschmidt Pascal
• Wehmeyer Wolfgang

Classifications

• A61M2205/3331

  Pressure; Flow · CPC title

• A61M2205/50

  with microprocessors or computers · CPC title

• A61M1/3643

  Priming, rinsing before or after use · CPC title

• A61M1/341

  by measuring the filtrate rate or volume · CPC title

• A61M1/365

  through membranes, e.g. by inverted trans-membrane pressure [TMP] · CPC title