Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-12318551-B2
Publication Date
2025-06-03
Expiration Date
Abstract
An intravascular heart pump assembly can include a rotor with at least one impeller blade, and a cannula. The present application describes various cannulas that can be manufactured from multiple layers of material to improve flexibility, manufacturability, and durability without increasing an outer diameter of the cannula. In one embodiment, the cannula includes an inflow section having a sheet formed of a shape memory material embedded within a polymer and having at least one lateral hole or aperture in the inflow section. The at least one lateral hole is defined by a first hole in the sheet and a second hole in the outer polymer layer of the cannula. The first hole and the second hole overlap so that blood can enter the cannula through the holes.
Core Innovation
The invention relates to an intravascular heart pump cannula for an intravascular heart pump assembly having an elongate catheter and a rotor with at least one impeller blade coupled to a distal end of the elongate catheter, together with a motor operatively coupled to the rotor. The cannula includes a cannula body with a proximal region and a distal region, and the distal region has a reinforced inflow section.
The reinforced inflow section includes a reinforcing sheet embedded in the cannula body, where the reinforcing sheet has a proximal sheet end and a distal sheet end. The reinforced inflow section is bounded by a first coil section adjacent the proximal sheet end and a second coil section adjacent the distal sheet end. The reinforcing sheet has a first plurality of holes extending through the reinforced inflow section and a second plurality of holes extending through the reinforcing sheet.
The proximal region has an outflow section comprising at least one lateral outflow hole. Blood inflow holes are formed by overlapping apertures in an embedded shape-memory sheet and a polymer layer, so blood contacts only smooth polymer edges rather than sharp sheet edges. The reinforced inflow section increases flexibility and durability without increasing outer diameter, and it includes slitted openings in the shape-memory sheet to enable bending and flexing during insertion.
Claims Coverage
Independent claim coverage is provided by one independent claim that includes four main inventive areas: the intravascular heart pump assembly with an elongate catheter and rotor, the cannula with a reinforced inflow section bounded by coil sections, the reinforcing sheet with pluralities of holes extending through the reinforced inflow section and through the reinforcing sheet, and an outflow section with at least one lateral outflow hole.
Intravascular heart pump assembly with elongate catheter and rotor
An intravascular heart pump assembly comprising an elongate catheter with a proximal end outside the patient's body and a distal end in an artery proximate to a patient's heart; a rotor with at least one impeller blade coupled to the distal end of the elongate catheter, and a motor operatively coupled to the rotor.
Reinforced inflow section with embedded reinforcing sheet
A cannula comprising a cannula body having a proximal region and a distal region, the distal region having a reinforced inflow section comprising a reinforcing sheet embedded in the cannula body, the reinforcing sheet having a proximal sheet end and a distal sheet end, the reinforced inflow section bounded by a first coil section adjacent the proximal sheet end and a second coil section adjacent to the distal sheet end.
Reinforcing sheet with pluralities of holes
The reinforcing sheet has a first plurality of holes that extend through the reinforced inflow section and a second plurality of holes that extend through the reinforcing sheet.
Proximal outflow section with lateral outflow hole
The proximal region having an outflow section comprising at least one lateral outflow hole.
The claim coverage centers on an intravascular heart pump assembly that uses a rotor on a distal catheter end and a cannula body in which a distal reinforced inflow section uses an embedded reinforcing sheet bounded by coil sections, with defined hole pluralities through both the reinforced inflow section and the reinforcing sheet, while the proximal region provides at least one lateral outflow hole.
Stated Advantages
Increases flexibility and durability without increasing outer diameter.
Blood inflow holes are configured so blood contacts smooth polymer edges rather than sharp sheet edges.
Allows bending and flexing during insertion.
Documented Applications
Intravascular heart pump assembly use in an artery proximate to a patient's heart, with the rotor and impeller blade coupled to a distal end of an elongate catheter.
Interested in licensing this patent?