Apparatus and method for identifying a tubing system for an extracorporeal blood treatment device
First Claim
1. An apparatus for extracorporeal blood treatment comprising:
- a dialyser or filter having a first chamber and a second chamber separated by a semipermeable membrane;
at least one pump to be operated at a predetermined rotational speed n for pumping fluid in a tubular line system to be inserted into the extracorporeal blood treatment apparatus; and
a central control unit for controlling the extracorporeal blood treatment apparatus; and
a device for recognizing the tubular line system to be inserted into the extracorporeal blood treatment apparatus comprising;
an evaluation unit configured such that the tubular line system is recognized on the basic principle of the flow rate Q with which the fluid is pumped in a tubular line section of the tubular line system by the at least one pump, depending on the rotational speed n at which the at least one pump is operated, and the internal diameter d of the tubular line section.
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Accused Products
Abstract
The invention relates to an apparatus for extracorporeal blood treatment, comprising a device for detecting a tubing system to be placed in the blood treatment apparatus and a method for detecting a tubing system to be placed in an extracorporeal blood treatment apparatus. The tubing system is detected on the basis of the dependency of the flow rate Q, at which the fluid is delivered by at least one pump of the extracorporeal blood treatment apparatus in a tubing section of the tubing system, on the speed n at which the at least one pump is operated, and on the inner diameter d of the tube of the tubing section. Because the dependency of the flow rate on the pump speed and the tube cross section is known, a conclusion can be drawn as to whether a particular tubing system has been placed in the extracorporeal blood treatment apparatus.
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Citations
13 Claims
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1. An apparatus for extracorporeal blood treatment comprising:
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a dialyser or filter having a first chamber and a second chamber separated by a semipermeable membrane; at least one pump to be operated at a predetermined rotational speed n for pumping fluid in a tubular line system to be inserted into the extracorporeal blood treatment apparatus; and a central control unit for controlling the extracorporeal blood treatment apparatus; and a device for recognizing the tubular line system to be inserted into the extracorporeal blood treatment apparatus comprising;
an evaluation unit configured such that the tubular line system is recognized on the basic principle of the flow rate Q with which the fluid is pumped in a tubular line section of the tubular line system by the at least one pump, depending on the rotational speed n at which the at least one pump is operated, and the internal diameter d of the tubular line section. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for recognizing a tubular line system to be inserted into an extracorporeal blood treatment apparatus, in which the extracorporeal blood treatment apparatus comprises:
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a dialyser or filter having a first chamber and a second chamber separated by a semipermeable membrane, at least one pump to be operated at a predetermined rotational speed n for pumping fluid in a tubular line system to be inserted into the extracorporeal blood treatment apparatus, and a central control unit for controlling the extracorporeal blood treatment apparatus, said method comprising; pumping, via the at least one pump operated at the predetermined rotational speed n, fluid in the tubular line system; measuring a flow rate Q with which the fluid is pumped; determining an internal diameter d of a tubular line section of the tubular line system; and recognizing the tubular line system on the basic principle of the flow rate Q with which the fluid is pumped in the tubular line section of the tubular line system by the at least one pump, depending on the rotational speed n at which the at least one pump is operated, and the internal diameter d of the tubular line section. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for recognizing a tubular line system to be inserted into an extracorporeal blood treatment apparatus, in which the extracorporeal blood treatment apparatus comprises:
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a dialyser or filter having a first chamber and a second chamber separated by a semipermeable membrane, at least one pump to be operated at a predetermined rotational speed n for pumping fluid in a tubular line system to be inserted into the extracorporeal blood treatment apparatus, and a central control unit for controlling the extracorporeal blood treatment apparatus, said method comprising; pumping, via the at least one pump operated at the predetermined rotational speed n, fluid in the tubular line system; determining an internal diameter d of a tubular line section of the tubular line system; and recognizing the tubular line system on the basic principle of the flow rate Q with which the fluid is pumped in the tubular line section of the tubular line system by the at least one pump, depending on the rotational speed n at which the at least one pump is operated, and the internal diameter d of the tubular line section, wherein the at least one pump comprises; a first pump for pumping fluid in a first tubular line section, and a second pump for pumping fluid in a second tubular line section of the tubular system, the first tubular line section and the second tubular line section being arranged one behind the other, the first tubular line section having a first internal diameter, and the second tubular line section having a second internal diameter, said method further comprising; measuring a pressure in a section of the tubular line between the first pump and the second pump; evaluating the relation between the rotational speeds of the first pump and the second pump at which the measured pressure remains unchanged in a predetermined time interval; and if the rotational speed of the first pump and the second pump differ, deducing that the internal diameters of the first tubular line section and second tubular line section differ from one another, and if the rotational speed of the first pump and the second pump are substantially the same, deducing that the internal diameters of the first tubular line section and second tubular line section are equal.
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Specification