Arrangement with a blood pump and a gas exchanger for extracorporeal membrane oxygenation
Inventors
Assignees
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Publication Number
US-8882695-B2
Publication Date
2014-11-11
Expiration Date
Abstract
The invention relates to an arrangement having a blood pump and a gas exchanger for extracorporeal membrane oxygenation. According to the invention, the blood pump is designed as a pulsatile blood pump and is arranged with the gas exchanger in the same housing. The pulsatile blood pump and the gas exchanger are preferably connected to the same gas source so that the blood pump can be pneumatically driven. The novel ECMO system has a simple design, is flexible, and in particular can be used directly on the patient.
Core Innovation
The invention relates to an arrangement for extracorporeal membrane oxygenation (ECMO) in which oxygenation gas and pumping power are provided through a pulsatile gas arrangement. A rigid housing includes a blood inlet, a blood outlet, a pulsatile gas inlet, and an oxygenation gas inlet. A pulsatile blood pump within the housing includes an expandable member connected to receive pulsatile gas from the pulsatile gas inlet, and a gas exchanger for extracorporeal membrane oxygenation is within the housing.
An external gas source provides at least a pulsatile gas outlet, and the pulsatile gas inlet is connected to receive pulsatile gas from the pulsatile gas outlet to provide pumping power to the expandable member. A portion of the gas from the gas source is fed to the gas exchanger to provide an oxygenation function, so the gas source supports both pumping power and oxygenation gas delivery.
The described arrangements emphasize on-housing integration of the pulsatile blood pump and the gas exchanger driven by pulsatile gas, with multiple gas-routing and control configurations. The content further describes pump-to-exchanger placement and orientation options within the housing, and pneumatic/mechanical actuation variants, while retaining the concept of using pulsatile gas to drive an expandable-member pump and using fed gas to provide oxygenation.
Claims Coverage
Only one independent claim is provided. The claim coverage centers on a single inventive concept: integrating within a rigid housing both a pulsatile blood pump driven by pulsatile gas from an external gas source and a gas exchanger receiving a portion of that gas for oxygenation.
Rigid housing with blood and gas ports
A rigid housing having a blood inlet, a blood outlet, a pulsatile gas inlet, and an oxygenation gas inlet.
Pulsatile blood pump with expandable member driven by pulsatile gas
A pulsatile blood pump within the housing and comprising an expandable member connected to receive pulsatile gas from the pulsatile gas inlet.
Gas exchanger for extracorporeal membrane oxygenation within the housing
A gas exchanger for extracorporeal membrane oxygenation within the housing.
External gas source supplying pulsatile gas for pumping and fed gas for oxygenation
A gas source external to the housing and having at least a pulsatile gas outlet, wherein the pulsatile gas inlet is connected to receive pulsatile gas from the pulsatile gas outlet of the external gas source to provide pumping power to the expandable member, and wherein a portion of the gas from the gas source is fed to said gas exchanger to provide an oxygenation function.
The independent claim defines an integrated ECMO arrangement in which pumping power is derived from pulsatile gas delivered from an external gas source to an expandable-member pulsatile blood pump, while a portion of that gas is also fed to an in-housing gas exchanger to provide oxygenation.
Stated Advantages
Compactness and on-patient deployability via short/optimized blood inlet/outlet line lengths.
Omission of reservoir.
Optional omission of outlet filter.
Reduced thrombus risk via pulsatile mixing.
Simplified operation.
Minimal electrical power requirement.
Documented Applications
Extracorporeal membrane oxygenation (ECMO) arrangement for providing oxygenation using a gas exchanger and a pulsatile blood pump within a rigid housing.
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