Granted Patent B2

US 12,728,256 · App. 18/055,311 · Granted Sep 8, 2026

Inventors: Theodosios Alexander (Venice, FL); Martin T. Rothman (Bodega Bay, CA)

Assignee: Torvion Medical Inc.

A61M60/808A61M60/117A61M60/13A61M60/139A61M60/237A61M60/416A61M60/81A61M60/824A61M60/829A61M2205/0238A61M2205/0266

Abstract

Claims (30)

1 . A mechanical circulatory support device comprising:

a pair of contra-rotating impellers comprising a first impeller and a second impeller, the pair of contra-rotating impellers configured to fold for installation;

a core shaft coupled to the first impeller;

a peripheral shaft coupled to the second impeller;

a first motor coupled to the core shaft;

a second motor coupled to the peripheral shaft, wherein the first motor and the second motor are arranged coaxially, wherein the first motor and the second motor are contra-rotating; and

an hourglass-shaped cage comprising an inlet section, a central waist section, and an outlet section, wherein the central waist section has a constant diameter when installed,

wherein the first impeller and the second impeller are positioned within the central waist section of the hourglass-shaped cage when installed,

wherein the constant diameter of the central waist section is less than a diameter of the inlet section when installed,

wherein the constant diameter of the central waist section is less than a diameter of the outlet section when installed, and

wherein the inlet section, the central waist section, and the outlet section are substantially coaxial when installed.

2 . The mechanical circulatory support device of claim 1 , comprising a shaft sheath covering the core shaft and the peripheral shaft.

3 . The mechanical circulatory support device of claim 2 , comprising at least one fluid path between the shaft sheath and the peripheral shaft.

4 . The mechanical circulatory support device of claim 1 , further comprising at least one fluid path between the peripheral shaft and the core shaft.

5 . The mechanical circulatory support device of claim 1 , wherein at least one shaft comprises a high-lubricity coating.

6 . The mechanical circulatory support device of claim 1 , wherein at least one impeller comprises at least two blade-carrying assemblies rotated to different azimuthal orientations.

7 . The mechanical circulatory support device of claim 1 , further comprising an indexing arrangement holding impeller segments in azimuthal positions.

8 . The mechanical circulatory support device of claim 1 , further comprising a flushing fluid path between the pair of contra-rotating impellers.

9 . The mechanical circulatory support device of claim 1 , wherein the hourglass-shaped cage comprises a shape memory alloy.

10 . The mechanical circulatory support device of claim 1 , further comprising a coating with anti-thrombotic or drug-eluding properties.

11 . The mechanical circulatory support device of claim 1 , wherein the peripheral shaft comprises slots for a flushing fluid path.

12 . The mechanical circulatory support device of claim 1 , wherein at least one impeller comprises an even number of blades.

13 . The mechanical circulatory support device of claim 1 , wherein blades of at least one impeller partially overlap.

14 . The mechanical circulatory support device of claim 1 , wherein the peripheral shaft surrounds the core shaft.

15 . The mechanical circulatory support device of claim 1 , further comprising a shaft sheath, wherein the shaft sheath, the peripheral shaft, and the core shaft are coaxial.

16 . The mechanical circulatory support device of claim 1 , wherein the core shaft is coupled to a nose cone.

17 . The mechanical circulatory support device of claim 1 , wherein a blade folding arrangement is in relation to a rolling direction in the manufacture of nitinol sheets.

18 . The mechanical circulatory support device of claim 1 , wherein the first motor and the second motor are configured to be extra-corporeal.

19 . The mechanical circulatory support device of claim 1 , wherein the first motor and the second motor are configured to rotate at equal revolutions per minute.

20 . The mechanical circulatory support device of claim 1 , wherein at least one impeller comprises a diameter between 2 mm and 40 mm.

Assignments (1)

Continuity (2)

References Cited (212)