Blood Treatment Device Comprising A Functional Unit For Carrying Out The Blood Treatment And Method For Monitoring The Functionality And/Or The Operating State Of The Functional Unit

Patent metadata

Field	Value
Publication number	US-2017232174-A1
Application number	US-201515501861-A
Country	US
Kind code	A1
Filing date	Jul 21, 2015
Priority date	Aug 7, 2014
Publication date	Aug 17, 2017
Grant date	—

Abstract

The invention relates to a blood treatment device comprising an attachment unit 7 for attaching a functional unit 1 intended for single use for carrying out the blood treatment. The blood treatment device according to the invention is characterised by a monitoring unit 8 for monitoring the operability and/or the operating state of the functional unit 1, which functional unit comprises at least one light transmitter 17 A, 18 A and at least one light receiver 17 B, 18 B. The light transmitter and light receiver are arranged in the monitoring unit 8 according to the invention on one side of the functional unit 1 . The arrangement of the light transmitter and light receiver on the same side has the advantage that the monitoring unit 8 can be integrated into the attachment unit 7 of the blood treatment device without any major structural modifications. The monitoring of the functional unit 1 is based on an optical measurement method in which the light reflected on a part of the functional unit 1 or a part of the attachment unit 7 is detected. A calculation- and evaluation unit 13 is configured such that conclusions can be drawn as to a defective state and/or a certain operating state of the functional unit 1 based on the intensity of the light falling on the functional unit and the light reflected on the functional unit or the attachment unit.

First claim

1 . A blood treatment device comprising an attachment unit for attaching a functional unit intended for single use for carrying out the blood treatment and a monitoring unit for monitoring the operability and/or the operating state of the functional unit,
characterised in that the monitoring unit comprises at last one light transmitter and at least one light receiver that are arranged such that the light emitted by the light transmitter falls on one side of the functional unit and the light reflected on a part of the functional unit or a part of the attachment unit falls on the light receiver, and the monitoring unit comprises a calculation- and evaluation unit that is configured such that conclusions can be drawn as to a defective state and/or a certain operating state of the functional unit based on the intensity of the light falling on the functional unit and of the light reflected on the functional unit or the attachment unit.

2 . The blood treatment device according to claim 1 , characterised in that the attachment unit comprises an attachment component and a cover component that are arranged at such a distance from one another that the functional unit can be inserted between the attachment component and the cover component, the light transmitter and the light receiver being provided in or on the cover component.

3 . The blood treatment device according to claim 2 , characterised in that the attachment component of the attachment unit comprises a contact surface for the functional unit that reflects the light of the light transmitter.

4 . The blood treatment device according to claim 3 , characterised in that the contact surface of the attachment component comprises a flexible material.

5 . The blood treatment device according to claim 2 , characterised in that the cover component of the attachment unit is attached to the attachment component so as to be movable between an open position and a closed position.

6 . The blood treatment device according to claim 2 , characterised in that the cover component of the attachment unit is configured as a clamp component, so that the functional unit can be attached in a clamped manner between the attachment component and the cover component.

7 . The blood treatment device according to claim 2 , characterised in that the attachment unit comprises a suction unit for creating a vacuum at the attachment component, so that the functional unit can be attached to the attachment component by way of suction power.

8 . The blood treatment device according to claim 1 , characterised in that the calculation- and evaluation unit of the monitoring unit is configured such that, based on the reduction of the intensity of the light, it can be concluded that a functional unit is attached to the attachment unit.

9 . The blood treatment device according to claim 1 , characterised in that the calculation- and evaluation unit of the monitoring unit is configured such that, based on the reduction of the intensity of the light, it can be concluded that a chamber or a channel of the functional unit is filled with a fluid, in particular dialysate or substitution fluid.

10 . The blood treatment device according to claim 9 , characterised in that the calculation- and evaluation unit of the monitoring unit is configured such that a control signal is generated when the calculation- and evaluation unit has detected that the chamber and/or the channel of the functional unit is filled with a fluid, in particular dialysate or substitution fluid, the blood treatment device comprising a control unit that receives the control signal of the calculation- and evaluation unit.

11 . The blood treatment device according to claim 9 , characterised in that the calculation- and evaluation unit of the monitoring unit is configured such that, based on the reduction of the intensity of the light, it can be concluded that the fluid with which the chamber or the channel is filled contains haemoglobin.

12 . The blood treatment device according to claim 11 , characterised in that the calculation- and evaluation unit of the monitoring unit is configured such that an alarm signal is generated when the calculation- and evaluation unit has detected that the fluid with which the chamber or the channel is filled contains haemoglobin, the blood treatment device comprising an alarm unit that receives the alarm signal of the calculation- and evaluation unit.

13 . The arrangement comprising the blood treatment device according to claim 1 and a functional unit intended for single use for carrying out the blood treatment.

14 . The arrangement according to claim 13 , characterised in that the functional unit comprises a housing body that is permeable to light, in which at least one chamber for receiving a fluid and/or at least one channel for carrying a fluid are formed, the light transmitter and the light receiver being arranged on one side of the housing body such that the light emitted by the light transmitter falls on a chamber and/or a channel of the functional unit that is attached to the attachment unit.

15 . The arrangement according to claim 14 , characterised in that the housing body of the functional unit comprises a housing part formed having trough-shaped recesses, which housing part is sealed by a flat housing part so as to be impermeable to fluids.

16 . The arrangement according to claim 15 , characterised in that the flat housing part is a film connected to the housing part formed having trough-shaped recesses.

17 . The arrangement according to claim 14 , characterised in that the chamber or the channel comprises an opening sealed with a hydrophobic membrane, the light transmitter and the light receiver being arranged such that the light emitted by the light transmitter falls on the hydrophobic membrane of the chamber and the light reflected by the hydrophobic membrane falls on the light receiver.

18 . The arrangement according to claim 17 , characterised in that the calculation- and evaluation unit of the monitoring unit is configured such that, based on the reduction of the intensity of the light, it can be concluded that the hydrophobic membrane is defective.

19 . A method for monitoring the operability and/or the operating state of a functional unit intended for single use, which is attached to an attachment unit of a blood treatment device for carrying out a blood treatment, the functional unit comprising a housing body that is permeable to light, in which a plurality of chambers for receiving a fluid and a plurality of channels for carrying a fluid are formed, and
light being emitted from at least one light transmitter on one side of the functional unit and the light reflected on a part of the attachment unit or the functional unit being received by at least one light receiver, characterised in that the operability and/or the operating state of the functional unit is monitored based on the reduction of the intensity of the light, it then being possible to conclude that the functional unit is attached to the attachment unit and/or a chamber or a channel is filled with a fluid, in particular dialysate or substitution fluid, and/or the fluid with which the chamber or the channel is filled contains haemoglobin.

20 . The method according to claim 19 , characterised in that at least one chamber or at least one channel comprises an opening sealed off with a hydrophobic membrane and that, based on the reduction of the intensity of the light, it can be concluded that the hydrophobic membrane is defective.

Assignees

• Fresenius Medical Care Deutschland Gmbh

Inventors

• Gerlach Daniel
• Hacker Jurgen
• Noack Joachim
• Scheunert Peter

Classifications

• G08B21/02

  Alarms for ensuring the safety of persons · CPC title

• A61M2205/14

  Detection of the presence or absence of a tube, a connector or a container in an apparatus · CPC title

• A61M1/3627

  Degassing devices; Buffer reservoirs; Drip chambers; Blood filters · CPC title

• G01M3/38

  by using light (G01M3/02 takes precedence) · CPC title

• A61M2205/121

  interface between cassette and base · CPC title