US 2011/0034850 A1 · BLOOD TREATMENT APPARATUS AND METHOD

Abstract

A proposed blood treatment apparatus includes a blood treatment unit, at least one fluid pump and at least one blood pump. The fluid pumps are configured to pass blood treatment fluid through the blood treatment unit, while the blood pumps are configured to extract untreated blood from a blood source, e.g. a patient, pass the extracted blood through the blood treatment unit and deliver treated blood to a target vessel, e.g. likewise represented by a patient. Each blood pump includes a pumping chamber, which is separated into a first accumulation container and a second accumulation container by a flexible member. The flexible member is further movable within the pumping chamber so as to vary a volume relationship between the first and second accumulation containers. The second accumulation container is configured to receive an amount of blood treatment fluid to act on the flexible member and thus pump blood from the first accumulation container.

Claims24

Dependent claims

A blood treatment apparatus, comprising:

a blood treatment unit,
at least one fluid pump configured to pass a blood treatment fluid through the blood treatment unit, and
at least one blood pump configured to extract untreated blood from a blood source, pass extracted blood through the blood treatment unit and deliver treated blood to a target vessel the at least one blood pump comprising a pumping chamber and a flexible member separating the pumping chamber into a first accumulation container and a second accumulation container, the flexible member being movable within the pumping chamber so as to vary a volume relationship between the first and second accumulation containers, the second accumulation container being configured to receive an amount of working fluid to act on the flexible member and thus pump blood from the first accumulation container, wherein the at least one fluid pump and the at least one blood pump are arranged such that the blood treatment fluid constitutes the working fluid for the at least one blood pump.

A method of treating blood in a blood treatment apparatus including a blood treatment unit, at least one fluid pump configured to pass a blood treatment fluid through the blood treatment unit, and at least one blood pump configured to extract untreated blood from a blood source, pass extracted blood through the blood treatment unit and deliver treated blood to a target vessel, the at least one blood pump further including a pumping chamber and a flexible member separating the pumping chamber into a first accumulation container and a second accumulation container, the flexible member being movable within the pumping chamber so as to vary a volume relationship between the first and second accumulation containers and thus pump blood that is being passed through the first accumulation container, the method wherein

in a first phase:
receiving blood from the blood source in the first accumulation container, and
ejecting blood treatment fluid from the second accumulation container, and
in a second phase subsequent to the first phase:
ejecting blood from the first accumulation container for delivery to the target vessel, and
receiving blood treatment fluid into the second accumulation container.

3 more elements

Dependencies are inferred from the claim text.

Blood treatment apparatus and method

Life of this patent

Blood treatment apparatus and method

Life of this patent

Abstract

Claims24