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EP-4735092-A1 - BLOOD PUMP

EP4735092A1EP 4735092 A1EP4735092 A1EP 4735092A1EP-4735092-A1

Abstract

The present disclosure relates to a blood pump (10) comprising a pumping section (12) having a first blood flow opening (14) and a second blood flow opening (16), a pump element (18) being at least partially disposed within the pumping section (12), a drive unit (20) having a rotor (22) and a stator (24), wherein the stator (24) comprises a first coil assembly (26) and second coil assembly (28), and a circuit board (32) having a first pad of a first type (P11), a second pad of the first type (P21), a first pad of a second type (P12) and a second pad of the second type (P22). The first pad of the second type (P12) and the second pad of the second type (P22) are distanced from each other on the circuit board (32) and the first pad of the second type (P12) is electrically connected to the second pad of the second type (P22) by a first bridge (34). The first coil assembly (26) is connected to the first pad of the first type (P11) and to the first pad of the second type (P12), and the second coil assembly (28) is connected to the second pad of the first type (P21) and to the second pad of the second type (P22). A first cable (42) is attached to the first pad of the first type (P11) and a second cable (44) is attached to the second pad of the first type (P21). The first cable (42) and the second cable (44) are configured to apply electrical signals to the first coil assembly (26) and the second coil assembly (28) to rotate the rotor (22) and to drive the pump element (18) so that a blood flow between the first blood flow opening (14) and the second blood flow opening (16) is generated.

Inventors

  • KIRCHHOFF, FRANK
  • Carell, Werner

Assignees

  • Abiomed Europe GmbH

Dates

Publication Date
20260506
Application Date
20240613

Claims (15)

  1. 1 . Blood pump (10) comprising: a pumping section (12) having a first blood flow opening (14) and a second blood flow opening (16); a pump element (18) being at least partially disposed within the pumping section (12); a drive unit (20) having a rotor (22) and a stator (24), wherein the stator (24) comprises a first coil assembly (26) and a second coil assembly (28); a circuit board (32) having a first pad of a first type (P11 ) , a second pad of the first type (P21), a first pad of a second type (P12) and a second pad of the second type (P22), wherein the first pad of the second type (P12) and the second pad of the second type (P22) are distanced from each other on the circuit board (32), wherein the first pad of the second type (P12) is electrically connected to the second pad of the second type (P22) by a first bridge (34), wherein the first coil assembly (26) is connected to the first pad of the first type (P11) and to the first pad of the second type (P12), and wherein the second coil assembly (28) is connected to the second pad of the first type (P21) and to the second pad of the second type (P22); a first cable (42) being attached to the first pad of the first type (P1 1); and a second cable (44) being attached to the second pad of the first type (P21); wherein the first cable (42) and the second cable (44) are configured to apply electrical signals to the first coil assembly (26) and the second coil assembly (28) to rotate the rotor (22) and to drive the pump element (18) so that a blood flow between the first blood flow opening (14) and the second blood flow opening (16) is generated.
  2. 2. Blood pump (10) according to claim 1 , wherein the first coil assembly (26) comprises a first coil of a first type (C11) and a second coil of the first type (C21), wherein the circuit board (32) comprises a first pad of a third type (P13) and a second pad of the third type (P23), wherein the first pad of the third type (P13) and the second pad of the third type (P23) are distanced from each other on the circuit board (32), wherein the first pad of the third type (P13) is electrically connected to the second pad of the third type (P23) by a second bridge (36), wherein the first coil of the first type (C11) is connected to the first pad of the first type (P1 1) to establish the connection between the first coil assembly (26) and the first pad of the first type (P11), wherein the second coil of the first type (C21) is connected to the first pad of the second type (P12) to establish the connection between the first coil assembly (26) and the first pad of the second type (P12), wherein the first coil of the first type (C11) is connected to the first pad of the third type (P13), and wherein the second coil of the first type (C21) is connected to the second pad of the third type (P23).
  3. 3. Blood pump (10) according to claim 1 or 2, wherein the second coil assembly (28) comprises a first coil of a second type (C12) and a second coil of the second type (C22), wherein the circuit board (32) comprises a first pad of a fourth type (P14) and a second pad of the fourth type (P24), wherein the first pad of the fourth type (P14) and the second pad of the fourth type (P24) are distanced from each other on the circuit board (32), wherein the first pad of the fourth type (P14) is electrically connected to the second pad of the fourth type (P24) by a third bridge (38), wherein the first coil of the second type (C12) is connected to the second pad of the first type (P21) to establish the connection between the second coil assembly (28) and the second pad of the first type (P21), wherein the second coil of the second type (C22) is connected to the second pad of the second type (P22) to establish the connection between the second coil assembly (28) and the second pad of the second type (P22), wherein the first coil of the second type (C12) is connected to the first pad of the fourth type (P14) and wherein the second coil of the second type (C22) is connected to the second pad of the fourth type (P24).
  4. 4. Blood pump (10) according to any one of the preceding claims, wherein the stator (24) comprises a third coil assembly (30), and the circuit board (32) comprises a third pad of the first type (P31) and a third pad of the second type (P32), wherein the first pad of the second type (P12) and the second pad of the second type (P22) and the third pad of the second type (P32) are distanced from each other on the circuit board (32), wherein the third pad of the second type (P32) is electrically connected to the first pad of the second type (P12) and the second pad of the second type (P22) by the first bridge (34), wherein the third coil assembly (30) is connected to the third pad of the first type (P31) and to the third pad of the second type (P32); and wherein the blood pump (10) further comprises a third cable (46) being attached to the third pad of the first type (P31); wherein the third cable (46) is configured to apply electrical signals to the third coil assembly (30).
  5. 5. Blood pump (10) according to claim 4, wherein the third coil assembly (30) comprises a first coil of a third type (C13) and a second coil of the third type (C23), wherein the circuit board (32) comprises a first pad of a fifth type (P15) and a second pad of the fifth type (P25), wherein the first pad of the fifth type (P15) and the second pad of the fifth type (P25) are distanced from each other on the circuit board (32), wherein the first pad of the fifth type (P15) is electrically connected to the second pad of the fifth type (P25) by a fourth bridge (40), wherein the first coil of the third type (C13) is connected to the third pad of the first type (P31) to establish the connection between the third coil assembly (30) and the third pad of the first type (P31), wherein the second coil of the third type (C23) is connected to the third pad of the second type (P32) to establish the connection between the third coil assembly (30) and the third pad of the second type (P32), wherein the first coil of the third type (C13) is connected to the first pad of the fifth type (P15), and wherein the second coil of the third type (C23) is connected to the second pad of the fifth type (P25).
  6. 6. Blood pump (10) according to any one of the preceding claims, wherein the circuit board (32) comprises a first layer (48) having a first side (50) and a second side (52), wherein the first pad of the first type (P11) and the second pad of the first type (P21) and the first pad of the second type (P12) and the second pad of the second type (P22) are disposed on the first side (50) of the first layer (48), and wherein the first bridge (34) is disposed on the second side (52) of the first layer (48).
  7. 7. Blood pump (10) according to claim 6, wherein the first layer (48) comprises a first opening (60) and a second opening (62), wherein the circuit board (32) comprises a first connector (64) and a second connector (66), wherein the first connector (64) extends through the first opening (60), wherein the second connector (66) extends through the second opening (62), wherein the first bridge (34) is connected to the first connector (64) and to the second connector (66), wherein the first pad of the second type (P12) is connected to the first connector (64), and wherein the second pad of the second type (P22) is connected to the second connector (66).
  8. 8. Blood pump (10) according to claim 6 or 7, wherein the third pad of the first type (P31) and the third pad of the second type (P32) are disposed on the first side (50) of the first layer (48), wherein the first layer (48) comprises a third opening (68) and the circuit board (32) comprises a third connector (70) extending through the third opening (68), wherein the first bridge (34) is connected to the third connector (70), and wherein the third pad of the second type (P32) is connected to the third connector (70).
  9. 9. Blood pump (10) according to any one of claims 6 to 8, wherein the circuit board (32) comprises a second layer (54) having a first side (56) and a second side (58), wherein the first bridge (34) is disposed on the first side (56) of the second layer (54).
  10. 10. Blood pump (10) according to any one of claims 6 to 9, wherein the first pad of the third type (P13) and the second pad of the third type (P23) are disposed on the first side (50) of the first layer (48), and/ or the first pad of the fourth type (P14) and the second pad of the fourth type (P24) are disposed on the first side (50) of the first layer (48), and/ or wherein the first pad of the fifth type (P15) and the second pad of the fifth type (P25) are disposed on the first side (50) of the first layer (48).
  11. 11 . Blood pump (10) according to any one of claims 9 or 10, wherein the second bridge (36) is disposed on the second side (58) of the second layer (54), wherein the first layer (48) comprises a fourth opening (72) and a fifth opening (74) and the second layer (54) comprises a sixth opening (76) and a seventh opening (78), wherein the circuit board (32) comprises a fourth connector (80) and a fifth connector (82), wherein the fourth connector (80) extends through the fourth opening (72) and the sixth opening (76) and the fifth connector (82) extends through the fifth opening (74) and the seventh opening (78), wherein the second bridge (36) is connected to the fourth connector (80) and the fifth connector (82), and wherein the first pad of the third type (P13) is connected to the fourth connector (80) and the second pad of the third type (P23) is connected to the fifth connector (82).
  12. 12. Blood pump (10) according to any one of the preceding claims 9 to 11 , wherein the third bridge (38) is disposed on the second side (58) of the second layer (54), wherein the first layer (48) comprises an eighth opening (84) and a ninth opening (86) and the second layer (54) comprises a tenth opening (88) and an eleventh opening (90), wherein the circuit board (32) comprises a sixth connector (92) and a seventh connector (94), wherein the sixth connector (92) extends through the eighth opening (84) and the tenth opening (88) and the seventh connector (94) extends through the ninth opening (86) and the eleventh opening (90), wherein the third bridge (38) is connected to the sixth connector (92) and the seventh connector (94), and wherein the first pad of the fourth type (P14) is connected to the sixth connector (92) and the second pad of the fourth type (P24) is connected to the seventh connector (94).
  13. 13. Blood pump (10) according to any one of the preceding claims 9 to 12, wherein the fourth bridge (40) is disposed on the second side (58) of the second layer (54), wherein the first layer (48) comprises a twelfth opening (96) and a thirteenth opening (98) and the second layer (54) comprises a fourteenth opening (100) and a fifteenth opening (102), wherein the circuit board (32) comprises an eighth connector (104) and a ninth connector (106), wherein the eighth connector (104) extends through the twelfth opening (96) and the fourteenth opening (100) and the ninth connector (106) extends through the thirteenth opening (98) and the fifteenth opening (102), wherein the fourth bridge (40) is connected to the eighth connector (104) and the ninth connector (106), and wherein the first pad of the fifth type (P15) is connected to the eighth connector (104) and the second pad of the fifth type (P25) is connected to the ninth connector (106).
  14. 14. Blood pump (10) according to any one of the preceding claims, wherein the circuit board (32) comprises an adhesive foil (108) on an opposite side of the first side (50) of the first layer (48), preferably on the second side (58) of the second layer (54).
  15. 15. Blood pump (10) according to any one of the preceding claims, wherein the pads (P11 to P25) are disposed in an annular pattern on the circuit board (32), wherein in between two pads, in particular all pads, of the same type at least one pad of a different type is located.

Description

BLOOD PUMP The present invention relates to a blood pump. BACKGROUND OF THE INVENTION Different types of blood pumps are known, such as axial blood pumps, centrifugal (i.e. radial) blood pumps or combinations of both possibilities, where the blood flow is caused by both radial and axial forces. Such blood pumps are intended to support a patient’s heart and are generally inserted into the patient’s heart via a blood vessel such as the aorta or femoral artery by means of a catheter through a vascular access in the patient’s skin, i.e. percutaneously. Such blood pumps typically comprise a pumping section having a first blood flow opening and a second blood flow opening. The pump element may be an impeller having blades on its outer circumference. The pump element is driven by a drive unit and causes a blood flow between the at least one first blood flow opening and the at least one second blood flow opening. The blood pump may be provided for left ventricular support so that a blood flow is generated from the first blood flow opening to the second blood flow opening. In this case, the first blood flow opening is a blood flow inlet and the second blood flow opening is a blood flow outlet. Such a blood pump is also called an intravascular blood pump. Further, blood pumps which are placed in a patient’s heart may also be referred to as intracardiac blood pumps. Of course, such blood pumps may also be used as a right ventricular support and the blood pumps do not necessarily need to be deployed within the patient’s heart or blood vessels. Rather, such blood pumps may also be deployed externally of the heart to establish a blood flow from the heart to the blood vessel or vice versa. To establish the blood flow, the pump element is at least partially disposed within the pumping section and is generally supported on a shaft or axle, which is driven by the drive unit so that the pump element rotates at a chosen speed to generate the blood flow. Therefore, the drive unit typically comprises a rotor and a stator. The stator may comprise several coil assemblies which are connected to a circuit board. Electrical signals are transmitted to the coil assemblies by cables attached to the circuit board, so that a rotating magnetic field is established by the coil assemblies which causes the rotor to rotate and to thus drive the pump element. Typically, the circuit board comprises a plurality of pads to which the cables and the coil assemblies are mutually connected by forming nodes e.g., by brazing or soldering. However, as the circuit board has a very small dimension and a plurality of cables and coils are to be attached to the circuit board, the connecting process is demanding and may not be automatized, as typically two or more cables are to be soldered to one pad. In addition, the cables and connection wires of the coil assemblies need to be guided to the respective pad e.g., along the circumference of the circuit board, which may be demanding as bypass currents are to be avoided. Therefore, some of the connections or nodes respectively are formed via pads provided on an opposite surface of the circuit board. Typically, the connection of the coil assemblies is in a so-called star or wye circuit configuration, with the respective central node being formed via a larger pad provided on the opposite surface of the circuit board. This has the advantage that this space available on both sides of the circuit board can be utilized. However, the production of such a circuit board is cost intensive and may only be automatized to a certain degree. Alternatively, the central node may be formed by twisting and soldering the appropriate wires together, as derivable from e.g., WO 2023/ 018793 A1 . However, this configuration utilizes a lot of space and it needs to be warranted that no bypass currents emerge or unwanted contact between the wires and the pads or another wire is unintentionally established. It is thus an object of the invention to provide a blood pump having an improved circuit board, which allows for simplified assembly. SUMMARY OF THE INVENTION According to a first aspect, the blood pump may comprise a pumping section, a pump element, a drive unit, a circuit board, a first cable and a second cable. The pumping section may be a pump housing. The pumping section may have a first blood flow opening and a second blood flow opening. The pump element may at least partially be disposed within the pumping section. The drive unit may have a rotor and a stator, and the stator may comprise a first coil assembly and second coil assembly. The circuit board may have a first pad of a first type, a second pad of the first type, a first pad of a second type and a second pad of the second type. The first pad of the second type and the second pad of the second type may be distanced from each other on the circuit board. In other words, the first pad of the second type and the second pad of the second type may be spatially separated from ea