Blood filtering device

Inventors

Ghelli, Nicola • Costa Maianti, Edgardo • Balanzoni, Roberto • Petralia, Antonio

Assignees

Eurosets SRL

Abstract

A blood filtering device comprises a casing defining a containment volume and provided with at least a first inlet for the venous blood, at least a second inlet for the intracavitary blood, at least a third inlet for the extra cavitary blood and at least an outlet mouth for the blood; blood filtering means which are housed inside the containment volume and delimiting at least one filtering volume communicating with the blood inlets and at least one collecting volume communicating with the outlet mouth; where filtering means comprise: at least a first filtering element defining a closed profile and delimiting a first filtering volume communicating with the first inlet; at least a second filtering element defining a closed profile and delimiting a second filtering volume communicating with the second inlet; at least a third filtering element defining a closed profile and delimiting a third filtering volume communicating with the third inlet.

Core Innovation

The invention relates to a blood filtering device for extracorporeal circulation, including a casing that defines a containment volume and is provided with a venous blood inlet, an intracavitary blood inlet, an extra cavitary blood inlet, and an outlet mouth. Blood filtering means are housed inside the containment volume and delimit filtering volumes and collecting volumes that communicate respectively with the inlets and the outlet mouth. The filtering means comprise first, second, and third filtering elements that each define a closed profile and delimit a corresponding filtering volume communicating with the respective inlet.

The filtering elements are separated and distinct from each other, so that blood coming from different inlets is filtered through corresponding separate filtering volumes and is collected through collecting volumes that communicate with the outlet mouth. The device further includes blood separation means at at least one of the second and third inlets, communicating with the corresponding filtering volume. In additional embodiments, the blood separation means are configured by a plurality of channels with curvilinear extension that convey blood from a peripheral area toward a center, with channels including a converging section toward the center.

The invention also discloses internal guiding and routing structures that work inside at least one filtering element and inside the collecting volume. A conveying element is housed inside at least one of the second and third filtering elements and is adapted to guide blood along a predefined path defined by a substantially helical blood-flowing surface, with the side edge located at the internal wall of the corresponding filtering element. Further embodiments include at least one separation wall positioned inside the collecting volume to divide the collecting volume into a first collecting volume and a second collecting volume, each surrounding different filtering elements and communicating with the outlet mouth; additional internal break walls/passages and a rotatable externally accessible drawing-union sleeve are used to control communication and prevent mixing, including structures intended to retain lipids and white blood cells.

Claims Coverage

The document includes three independent claims (clm-00001, clm-00011, clm-00015), each based on the same general blood filtering device architecture with separated filtering elements and collecting volume(s) communicating with an outlet mouth. Across the independent claims, there are four main inventive feature groupings: separated filtering elements for venous/intracavitary/extra cavitary inlets, internal blood separation means at intracavitary/extra cavitary inlets, an internal conveying element providing a substantially helical predefined path, and internal separation walls dividing the collecting volume into distinct collecting regions.

Taken together, the independent claims define a blood filtering device having separated, distinct closed-profile filtering elements communicating with venous, intracavitary, and extra cavitary inlets, with collecting volume(s) leading to an outlet mouth; the claims additionally cover blood separation means at intracavitary/extra cavitary inlets, a conveying element that guides blood along a substantially helical predefined path inside at least one filtering element, and a separation wall that divides the collecting volume into distinct regions associated with different filtering elements.

Stated Advantages

Documented Applications