CN-121987940-A - Blood pumping device and interventional sheath

Abstract

The application discloses a blood pumping device and an intervention sheath tube, wherein the blood pumping device comprises an intervention sheath tube and a distal end assembly positioned at the distal end of the intervention sheath tube, the intervention sheath tube comprises a sheath tube body, a transmission assembly, a first bearing and a occupying assembly, a containing cavity and a perfusion pipeline are arranged in the sheath tube body in a communicating mode, the transmission assembly is at least partially positioned in the containing cavity, the first bearing is positioned in the containing cavity and connected with the sheath tube body, the first bearing is sleeved outside the transmission assembly, a runner for circulating perfusion liquid is arranged in the first bearing, the occupying assembly comprises at least one occupying piece positioned in the containing cavity, a circulation pipeline is formed between the occupying piece or the occupying piece and at least one of the sheath tube body, the transmission assembly and the first bearing, the circulation pipeline is communicated with the perfusion pipeline and the runner, and the single-side displacement size of the circulation pipeline relative to the runner is smaller than or equal to the radial size of the runner.

Inventors

• PAN GUANGLIANG

Assignees

• 丰凯利医疗器械(上海)有限公司

Dates

Publication Date

20260508

Application Date

20241105

Claims (20)

1. 1. A blood pumping device comprising an interventional sheath and an outflow channel at a distal end of the interventional sheath, the interventional sheath comprising: The sheath tube body is internally provided with a containing cavity and a perfusion pipeline which are communicated; A transmission assembly at least partially located within the receiving cavity; The first bearing is positioned in the accommodating cavity and connected with the sheath tube body, the first bearing is sleeved outside the transmission assembly, and a runner for circulating perfusion fluid is arranged in the first bearing; The space occupying assembly comprises at least one space occupying piece positioned in the accommodating cavity, a circulation pipeline is formed in the space occupying piece or between the space occupying piece and at least one of the sheath tube body, the transmission assembly and the first bearing, and the circulation pipeline is communicated with the filling pipeline and the flow channel; the one-sided offset dimension of the flow conduit relative to the flow channel is less than or equal to the radial dimension of the flow channel.
2. 2. The blood pumping device of claim 1, wherein a minimum distance between a midline of the flow channel and a midline of the flow conduit is less than or equal to a radial dimension of the flow channel.
3. 3. The blood pumping device of claim 1 or 2, wherein the flow channel comprises a first inner peripheral surface facing the drive assembly and a first outer peripheral surface facing away from the drive assembly, the flow conduit comprises a second inner peripheral surface facing the drive assembly and a second outer peripheral surface facing away from the drive assembly, and the flow conduit is offset on one side relative to the flow channel by a distance between the second inner peripheral surface and the first inner peripheral surface, or the flow conduit is offset on one side relative to the flow channel by a distance between the second outer peripheral surface and the first outer peripheral surface.
4. 4. A blood pumping device as defined in claim 3, wherein, The flow channel and the circulating pipeline are annular pipelines which are arranged around the transmission assembly, the axis of the flow channel is parallel to the axis of the circulating pipeline, and the interval between the axis of the flow channel and the axis of the circulating pipeline is smaller than or equal to the radial dimension of the flow channel; And/or the axis of the flow channel is collinear with the axis of the flow-through pipeline.
5. 5. The blood pumping device of claim 4, wherein a circumferential surface of the centerline of the flow channel intersects or is coplanar with a circumferential surface of the centerline of the flow-through tubing.
6. 6. The blood pumping device according to claim 5, wherein the first inner peripheral surface is connected to the second inner peripheral surface, the first outer peripheral surface is connected to the second outer peripheral surface, and a radial dimension of the flow channel is equal to a radial dimension of the flow channel.
7. 7. The blood pumping device of claim 1, wherein the flow channel comprises a first inner peripheral surface facing the transmission assembly and a first outer peripheral surface facing away from the transmission assembly, the flow line comprises a second inner peripheral surface facing the transmission assembly and a second outer peripheral surface facing away from the transmission assembly, the first inner peripheral surface is connected to the second inner peripheral surface and an angle between the first inner peripheral surface and the second inner peripheral surface is greater than 90 ° and less than or equal to 180 °, and the first outer peripheral surface is connected to the second outer peripheral surface and an angle between the first inner peripheral surface and the second inner peripheral surface is greater than 90 ° and less than or equal to 180 °.
8. 8. The blood pumping device of claim 7, wherein the receiving cavity comprises a bearing receiving cavity, the first bearing being located within the bearing receiving cavity; The first space occupying component comprises a first space occupying component which is positioned in the bearing accommodating cavity, a first pipeline which is communicated with the filling pipeline is arranged in the first space occupying component, and the radial size of the first pipeline is equal to that of the runner.
9. 9. The blood pumping device of claim 8, wherein two of said first bearings are disposed in said bearing receiving chamber at spaced intervals along the axial direction of said transmission assembly, said first spacer being disposed between two of said first bearings.
10. 10. The blood pumping device of claim 8, wherein the first spacer comprises a third sub-member and a fourth sub-member, the third sub-member is sleeved outside the transmission assembly, the fourth sub-member is sleeved outside the third sub-member, a gap between the third sub-member and the fourth sub-member forms the first pipeline, and a distance between an outer peripheral surface of the third sub-member and an inner peripheral surface of the fourth sub-member in a radial direction of the interventional sheath is equal to a radial dimension of the flow channel.
11. 11. The blood pumping device of claim 10, wherein the proximal and distal ends of the third sub-member abut the two first bearings, respectively, and the proximal and distal ends of the fourth sub-member abut the two first bearings, respectively.
12. 12. The blood pumping device of claim 8, wherein the bearing housing cavity comprises a proximal housing cavity and a distal housing cavity, an extension cavity extending distally along a proximal end is further provided in the sheath body, the extension cavity directly or indirectly communicates with the proximal housing cavity and the distal housing cavity, at least a portion of the transmission assembly extends from the proximal housing cavity to the distal housing cavity via the extension cavity, at least one of the first bearing is provided in each of the proximal housing cavity and the distal housing cavity, and the first spacer is provided in at least one of the proximal housing cavity and the distal housing cavity.
13. 13. The blood pumping device of claim 12, wherein the receiving cavity further comprises a first transition cavity communicating the distal receiving cavity and the extension cavity, the radial dimension of the distal receiving cavity being greater than the radial dimension of the extension cavity, the radial dimension of the first transition cavity decreasing in a distal-to-proximal direction; the space occupying assembly further comprises a third space occupying part, the third space occupying part is located in the first transition cavity and sleeved outside the transmission assembly, the third space occupying part is provided with a first surface deviating from the transmission assembly, the distance from the first surface to the axis of the transmission assembly gradually decreases along the direction from the far end to the near end, and a gap between the first surface and the conical surface of the first transition cavity forms a fourth pipeline which is communicated with the flow channel and the extension cavity.
14. 14. The blood pumping device of claim 13, wherein a radial distance between the first surface and the conical surface of the first transition lumen in the radial direction of the access sheath is equal to a radial dimension of the flow channel; the first surface is connected with the first inner peripheral surface, the included angle between the first surface and the first inner peripheral surface is larger than 90 degrees and smaller than 180 degrees, the conical surface of the first transition cavity is connected with the first outer peripheral surface, and the included angle between the conical surface of the first transition cavity and the first outer peripheral surface is larger than 90 degrees and smaller than 180 degrees.
15. 15. The blood pumping device of claim 13, wherein the drive assembly includes a first drive shaft and an impeller coupled to each other, the first drive shaft extending from the first transition chamber to the extension chamber, the impeller including an impeller shaft and an impeller body coupled to each other, the impeller body extending from the distal receiving chamber to the outflow channel; The third occupying part comprises a first sub part and a second sub part, the first sub part is sleeved outside the impeller shaft, the second sub part is sleeved outside the first transmission shaft, the first sub part is positioned at the far end of the second sub part, the distance from the first surface of the first sub part to the axis of the transmission assembly and the distance from the first surface of the second sub part to the axis of the transmission assembly are gradually reduced along the direction from the far end to the near end, and the distance from the first surface of the first sub part to the conical surface of the first transition cavity in the radial direction of the intervention sheath tube is equal to the distance from the first surface of the second sub part to the conical surface of the first transition cavity in the radial direction of the intervention sheath tube.
16. 16. The blood pumping device of claim 12, wherein the receiving cavity further comprises a second transition cavity, a power cavity is further provided in the sheath body, and the proximal receiving cavity, the second transition cavity and the power cavity are sequentially arranged in a distal-to-proximal direction; The transmission assembly comprises a first transmission shaft and a second transmission shaft which are coaxially connected, at least part of the first transmission shaft is positioned in the extension cavity, the second transmission shaft extends into the extension cavity from the power cavity through the proximal accommodating cavity and is connected with the first transmission shaft, the second transmission shaft comprises a first sub-shaft, a second sub-shaft and a third sub-shaft which are sequentially arranged along the direction from the distal end to the proximal end, at least part of the first sub-shaft is positioned in the proximal accommodating cavity, the second sub-shaft is positioned in the second transition cavity, at least part of the third sub-shaft is positioned in the power cavity, and the radial size of the second sub-shaft is smaller than that of the first sub-shaft and the third sub-shaft; the space occupying assembly further comprises a fourth space occupying part and a fifth space occupying part which are both positioned in the second transition cavity, the fourth space occupying part is sleeved outside the second sub-shaft, the fifth space occupying part is sleeved outside the fourth space occupying part, a second pipeline is formed in a gap between the fourth space occupying part and the fifth space occupying part, and the second pipeline is communicated with a runner in the near-end accommodating cavity.
17. 17. The blood pumping device of claim 16, wherein the fifth placeholder is provided with a notch extending radially through the fifth placeholder, and the priming line is in direct or indirect communication with the second line through the notch.
18. 18. The blood pumping device of claim 16, wherein a radial dimension of the second conduit is equal to a radial dimension of the flow channel; The outer peripheral surface of the fourth space occupying piece is connected with the first inner peripheral surface of the first bearing in the near-end accommodating cavity, an included angle between the outer peripheral surface of the fourth space occupying piece and the first inner peripheral surface of the first bearing in the near-end accommodating cavity is equal to 180 degrees, the inner peripheral surface of the fifth space occupying piece is connected with the first outer peripheral surface of the first bearing in the near-end accommodating cavity, and an included angle between the inner peripheral surface of the fifth space occupying piece and the first outer peripheral surface of the first bearing in the near-end accommodating cavity is equal to 180 degrees.
19. 19. The blood pumping apparatus of claim 16, wherein a third transition chamber is further provided within the sheath body between the power chamber and the second transition chamber; The blood pumping device further comprises a first plug positioned in the third transition cavity.
20. 20. The blood pumping apparatus of claim 12, wherein a return line is further provided in the sheath body and is in communication with the receiving chamber, and the perfusion fluid in the perfusion line flows through the first bearing and the first line to the return line, and at least a portion of the return line is formed by the extension chamber after the transmission assembly is removed.

Description

Blood pumping device and interventional sheath Technical Field The application belongs to the technical field of medical appliances, and particularly relates to a blood pumping device and an interventional sheath. Background In cardiac surgery, the heart function of a patient is weakened and the pumping capacity is insufficient due to the disease of the patient or the operation requirement. In this case, an active interventional medical device such as a ventricular assist device is required to assist the heart in pumping blood. The existing ventricular assist device utilizes the heart pumping principle to pump blood in the heart through a pumping mechanism and guide the blood to the aorta outside the heart to flow to the whole body. In some cases, the ventricular assist device may generate heat during operation, and thus may be cooled during use by means of circulating perfusate. However, the perfusion liquid discharge path is complicated and tortuous, and bubble residues which are difficult to discharge are easily generated in the path, so that the risk of perfusion liquid breaking, blood backflow or bubbles entering blood vessels is caused. Disclosure of Invention The embodiment of the application provides a blood pumping device which can reduce bubble residues in a perfusion liquid discharge pipeline. The embodiment of the application provides a blood pumping device, which comprises an intervention sheath tube and a distal end assembly positioned at the distal end of the intervention sheath tube, wherein the intervention sheath tube comprises a sheath tube body, a transmission assembly, a first bearing and a occupying assembly, a containing cavity and a perfusion pipeline are arranged in the sheath tube body in a communicating way, the transmission assembly is at least partially positioned in the containing cavity, the first bearing is positioned in the containing cavity and connected with the sheath tube body, the first bearing is sleeved outside the transmission assembly, a runner for circulating perfusion liquid is arranged in the first bearing, the occupying assembly comprises at least one occupying piece positioned in the containing cavity, a circulation pipeline is formed in the occupying piece or between the occupying piece and at least one of the sheath tube body, the transmission assembly and the first bearing, and the circulation channel is communicated with the perfusion pipeline and the runner. The single-side displacement dimension of the flow pipeline relative to the flow channel is smaller than or equal to the radial dimension of the flow channel. According to an embodiment of the first aspect of the application, the flow channel comprises a first inner circumferential surface facing the transmission assembly and a first outer circumferential surface facing away from the transmission assembly, the distance between the first inner circumferential surface and the first outer circumferential surface being the radial dimension of the flow channel. According to an embodiment of the first aspect of the application, the flow channel comprises a first inner circumferential surface facing towards the transmission assembly and a first outer circumferential surface facing away from the transmission assembly, and the flow conduit comprises a second inner circumferential surface facing towards the transmission assembly and a second outer circumferential surface facing away from the transmission assembly. The one-sided displacement dimension of the flow conduit with respect to the flow passage may be a distance between the second inner peripheral surface and the first inner peripheral surface, or may also be a distance between the second outer peripheral surface and the first outer peripheral surface. The single-side displacement sizes are smaller than or equal to the radial size of the flow channel. According to an embodiment of the first aspect of the present application, a minimum distance between a center line of the flow channel and a center line of the flow channel is smaller than or equal to a radial dimension of the flow channel, wherein the minimum distance between the center line of the flow channel and the first inner peripheral surface and the first outer peripheral surface is equal, and the minimum distance between the center line of the flow channel and the second inner peripheral surface and the second outer peripheral surface is equal. According to an embodiment of the first aspect of the application, the flow channel and the flow channel are both annular channels arranged around the transmission assembly, the axis of the flow channel is parallel to the axis of the flow channel, and the distance between the axis of the flow channel and the axis of the flow channel is smaller than or equal to the radial dimension of the flow channel, and/or the flow channel and the flow channel are both annular channels arranged around the transmission assembly, and the axis of the flow channel is colline