US 8,105,265 B2Granted

Systems, devices and methods for cardiopulmonary treatment and procedures

AssigneeDEKA Products Limited Partnership

InventorsJason A. Demers, Larry B. Gray, James D. Dale, N. Christopher Perry, David E. Altobelli

Life of this patent

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Abstract

A cardiopulmonary bypass system utilizing membrane-based reciprocating positive displacement blood pumps (“pod pumps”). In one aspect, the pod pumps are constructed to provide reduced shear forces on the blood being pumped. In another aspect blood flow through the pod pumps can be controlled by a controller using information from pressure sensors in the control chamber of the pod pumps. In another aspect, the pod pumps are included on a disposable unit that can be received and held by a receptacle means on a base unit, the base unit also providing pressurized control fluid to the pod pumps on the disposable unit through the receptacle means.

Claims22

Dependent claims

An extracorporeal blood flow system comprising:

an air removal container having an upper blood inlet, a lower blood outlet and an air vent near the top of the air removal container, the air vent sealingly connected to, a negative pressure source;
a blood pump having a pump inlet and a pump outlet;
a fluid path from the outlet of the air removal container to the inlet of the blood pump;
a reservoir containing a liquid with a blood inlet and a blood outlet;
a reservoir inlet fluid path branching from the pump outlet and fluidly connected to the inlet of the reservoir;
a reservoir outlet fluid path branching from the pump inlet and fluidly connected to the outlet of the reservoir;
a first valve means to control flow of blood from the reservoir to the pump inlet and a second valve means to control flow of blood from the pump outlet to the reservoir;
a pressure sensor in fluid communication with the air vent, and configured to measure air pressure within the air removal container;
and
a controller configured to receive the pressure information from the pressure sensor, and configured to control the valve means, wherein
the controller configured to monitor the air pressure within the air removal container, and control the first and second valve means to cause the liquid from the reservoir to flow into the blood pump upon detection of a change in the air pressure within the air removal container.

8 more elements

An extracorporeal blood flow system comprising:

an air trap having an upper inlet, a lower outlet and an air vent above the upper inlet, the air vent fluidly connected to a negative pressure source;
a first pump having a pump inlet and a pump outlet, the pump inlet fluidly connected to the lower outlet of the air trap;
a reservoir configured to hold a variable volume of liquid and having a reservoir inlet and a reservoir outlet, the reservoir inlet fluidly connected to the outlet of the pump, and the reservoir outlet fluidly connected to the inlet of the pump;
a first valve configured to control flow of liquid from the reservoir to the pump inlet and a second valve configured to control flow of liquid from the pump outlet to the reservoir, the first and second valves controllable by a controller;
and
a pressure sensor in fluid communication with the air vent, and configured to measure air pressure within the air trap, the pressure sensor configured to transmit pressure information to the controller;
wherein
the controller is configured to monitor the air pressure within the air trap, and upon detection of a change in the air pressure within the air trap, the controller configured to control the first and second valves to allow liquid from the reservoir to flow to the inlet of the blood pump or to allow liquid to flow from the outlet of the blood pump to the reservoir.

5 more elements

An extracorporeal blood flow system comprising:

an air trap having an upper inlet, a lower outlet and an air vent above the upper inlet, the air vent fluidly connected to a negative pressure source;
a first pump having a pump inlet and a pump outlet, the pump inlet fluidly connected to the lower outlet of the air trap;
a reservoir configured to hold a variable volume of liquid and having a reservoir inlet and a reservoir outlet, the reservoir inlet fluidly connected to the outlet of the first pump, and the reservoir outlet fluidly connected to the inlet of the first pump;
a first valve configured to control flow of liquid from the reservoir to the first pump inlet and a second valve to control flow of liquid from the first pump outlet to the reservoir, the first and second valves controllable by a controller;
a second pump having an inlet in fluid communication through a third valve with the reservoir outlet and an outlet in fluid communication through a fourth valve with the reservoir inlet, the third and fourth valves controllable by the controller;
and
a liquid volume sensor associated with the reservoir and configured to transmit information to the controller relating to the liquid volume in the reservoir;
wherein
the controller is configured to control the volume of liquid in the reservoir to within a pre-determined range.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/249,668Filed 10 Oct 2008 · us provisional application
Priority: 12 Oct 2007
Published: US 2009/0099498 A116 Apr 2009
Granted: 31 Jan 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

A61M 1/3621
Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood…
A61M 1/362227
Details related to the interface between cassette and machine: the interface providing means for actuating on functional elements of the cassette,…
A61M 1/36223
With a cassette forming partially or totally the blood circuit: the cassette being adapted for heating or cooling the blood
A61M 1/36225
With a cassette forming partially or totally the blood circuit: with blood pumping means or components thereof