Extracorporeal blood pump, heart-lung machine, method for operating an extracorporeal blood pump, and method for operating a heart-lung machine
AssigneeHemovent GmbH
InventorJens Hutzenlaub
Life of this patent
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Abstract
The present invention relates to a pulsatile positive-displacement pump with a flexible positive-displacement diaphragm which is operated pneumatically and by whose movement the blood is aspirated and displaced. A mechanical switching device in the interior of a drive unit ensures an autonomous operation of the blood pump, wherein no electricity or electronics system is needed.
Claims37
Extracorporeal blood pump for the aspiration and displacement of blood, wherein the blood pump has two blood chambers and a mechanical driving unit, wherein the driving unit is arranged between the blood chambers, wherein each blood chamber has a membrane, a blood inlet channel for entry of designated blood into an inlet position of the blood chamber and a blood outlet channel at an outlet position of the blood chamber for exit of the designated blood out from the blood chamber,
- characterized in that
- the blood inlet channel and blood outlet channel of each blood chamber are at different positions of the blood chamber,
- the blood outlet channels of both blood chambers are interconnected, and
- wherein the driving unit has a gas inlet, a gas outlet and a pressure chamber, wherein the pressure chamber is separated from the blood chambers by the membranes of the two blood chambers, the driving unit being in operative connection with the membrane, and
- wherein an area between the membranes of the two blood chambers or an area between at least one of the membranes of the two blood chambers and an effective surface comprises a coupling rod.
Extracorporeal blood pump for the aspiration and displacement of blood,
- wherein the blood pump has a blood chamber and a mechanical driving unit, wherein the driving unit is bordering on the blood chamber, wherein the blood chamber has a membrane, a blood inlet channel and a blood outlet channel, wherein the blood inlet channel enters the blood chamber at an inlet position and the blood outlet channel exits the blood chamber at an outlet position, and where the inlet position and outlet positions are not interconnected, wherein the driving unit has a gas inlet, a gas outlet as well as two pressure chambers, wherein each pressure chamber has an effective surface, with the blood chamber being separated from the pressure chamber via the membrane, the driving unit being in operative connection with the membrane, and
- wherein an area between the membrane and at least one of the effective surfaces comprises a coupling rod.
Extracorporeal blood pump for the aspiration and displacement of blood, wherein the blood pump has two blood chambers and a mechanical driving unit, wherein the driving unit is arranged between the blood chambers, wherein a blood chamber has a membrane, a blood inlet channel and a blood outlet channel, characterized in that
- the blood outlet channels of both blood chambers are interconnected, and
- wherein the driving unit has a gas inlet and a gas outlet and a pressure chamber, wherein the pressure chamber is separated from a blood chamber by the membrane, the driving unit being in operative connection with the position of the membrane, and
- wherein an area between the membranes of the two blood chambers or an area between at least one of the membranes of the two blood chambers and an effective surface comprises a coupling rod, and
- wherein the coupling rod has a hollow space on the inside, and
- wherein the coupling rod has a valve which is constructed so that a designated gas flow can move through the hollow space in the coupling rod and further on through the valve in the coupling rod and out of a pressure chamber via a bypass.
Dependencies are inferred from the claim text.