CN218420654U

CN218420654U - Delivery assembly and interventional blood pump system

Info

Publication number: CN218420654U
Application number: CN202221455035.0U
Authority: CN
Inventors: 谢超宇; 李剑青; 张振江; 卢飞; 李俊菲
Original assignee: Minimally Invasive Investment Holdings Ltd
Current assignee: Minimally Invasive Investment Holdings Ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2023-02-03
Anticipated expiration: 2032-06-09

Abstract

The utility model provides a conveying assembly and intervention formula blood pump system, conveying assembly includes: the device comprises an outer sheath tube, an inner sheath tube, a blocking component and a transmission part; the outer sheath tube is provided with a tube cavity, the inner sheath tube is movably arranged in the tube cavity along the axial direction in a penetrating mode, and the far end of the inner sheath tube is used for being connected with the intervention type blood pump; the outer sheath tube is used for restraining radial expansion of the interventional blood pump and conveying the interventional blood pump to a target position, and at least part of the outer sheath tube and the inner sheath tube have a gap; the blocking component is arranged on the outer sheath tube and/or the inner sheath tube; the blocking assembly has a blocking state and a unblocking state; when the blocking component is in a blocking state, the blocking component is abutted against the inner sheath tube to close a gap between the outer sheath tube and the inner sheath tube; when the blocking assembly is in a dredging state, the sealing of the gap is released, and the interventional blood pump is allowed to be accommodated into the sheath tube; the transmission piece is movably arranged in the gap along the axial direction, the far end of the transmission piece is connected with the blocking component, and the transmission piece is used for moving along the axial direction to drive the state conversion of the blocking component.

Description

Delivery assembly and interventional blood pump system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to delivery assembly and intervention formula blood pump system.

Background

Short-term trans-valvular blood pumps are mainly used for emergency treatment of cardiogenic shock and auxiliary circulation during high-risk PCI surgery. The aortic valve is arranged on an aortic valve, can provide flow support of up to 4L/min, replaces the blood pumping function of the heart, can save the life of patients with cardiogenic shock, or stabilizes the heart state during the operation of high-risk PCI patients, reduces the occurrence of arrhythmia, reduces the operation risk and ensures the success rate of high-risk PCI operations.

The pump head of the blood pump is made of a material with retractility, enters the heart through a catheter sheath, and is unfolded and fixed on an aortic valve after reaching the position, so that the blood pumping function is realized. The power of the blood pump is provided by a driving device outside the body and is connected with the pump head through a flexible shaft. The blood pump has at least two tube sheath structures, namely an inner sheath and an outer sheath. The inner sheath is used for wrapping the flexible shaft so as to prevent the flexible shaft rotating at a high speed from contacting with the outside during working; the outer sheath is arranged outside the inner sheath and can move back and forth to contract and expand the pump head. In order to retract the pump head, a gap is required between the inner sheath and the outer sheath. Therefore, the existing short-term valve-crossing blood pump has certain defects, blood can enter a gap between the inner sheath and the outer sheath, and thrombus can be formed due to no flow for a long time or the influence of high temperature of the inner sheath.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a conveying component and intervention formula blood pump system to solve the problem that current intervention formula blood pump forms the thrombus easily.

In order to solve the technical problem, the utility model provides a conveying assembly, it is used for intervention formula blood pump system, conveying assembly includes: the device comprises an outer sheath tube, an inner sheath tube, a blocking component and a transmission component;

the outer sheath tube is provided with a lumen, the inner sheath tube is movably arranged in the lumen in a penetrating way along the axial direction, and the distal end of the inner sheath tube is used for being connected with the intervention type blood pump; the external sheath tube is used for restraining radial expansion of the interventional blood pump and conveying the interventional blood pump to a target position, and at least part of gaps exist between the external sheath tube and the internal sheath tube;

the blocking assembly is disposed on one of the outer sheath and the inner sheath; the blocking assembly has a blocking state and a unblocking state; when the blocking assembly is in the blocking state, the blocking assembly abuts against the other one of the outer sheath tube and the inner sheath tube to close a gap between the outer sheath tube and the inner sheath tube; when the occlusion assembly is in the unblocked state, releasing the abutment and the closure of the gap to allow the interventional blood pump to be received into the sheath;

the transmission piece is movably arranged in the gap along the axial direction, the far end of the transmission piece is connected with the blocking assembly, and the transmission piece is used for moving along the axial direction so as to drive the blocking assembly to switch between the dredging state and the blocking state.

Optionally, the blocking assembly includes an opening and closing member annularly surrounding the circumference of the inner sheath, the opening and closing member has a first end and a second end opposite to each other along the axial direction, the first end is a free end and is connected with the transmission member; the second end is connected with one of the outer sheath and the inner sheath;

the first end is radially distal from the other of the outer sheath and the inner sheath when the occlusion assembly is in the deoccluded state; the first end radially abuts the other of the outer sheath and the inner sheath when the blocking assembly is in the blocking state.

Optionally, the second end is connected to a distal end portion of the sheath, and the blocking assembly is in the unblocking state, the opening and closing member is in a flared shape expanding towards the distal end.

Optionally, the opening and closing member has a plurality of circumferentially arranged skirt flaps, when the blocking assembly is in the unblocking state, a triangular gap is formed between adjacent skirt flaps, and one corner of the triangular gap faces the second end; when the blocking component is in the blocking state, the adjacent skirt petals are mutually adjacent.

Optionally, the blocking assembly includes a moving member, a first sealing member and a fixing member, which are sequentially arranged along an axial direction; the moving piece can move along the axial direction and is connected with the transmission piece; the first seal is annular around the inner sheath, the fixture being fixedly connected to one of the outer sheath and the inner sheath; when the blocking assembly is in the blocking state, the moving member moves towards the fixing member under the driving of the transmission member, and the first sealing member is pressed so that the first sealing member radially expands to abut against the other one of the outer sheath tube and the inner sheath tube.

Optionally, the driving medium includes a plurality of traction wires that extend along the axial direction, the moving member with the mounting all surrounds interior sheath pipe is the annular, the mounting with first sealing member has a plurality of channels of wearing to establish that link up along the axial, every wear to establish the channel and supply one the traction wire movably wears to establish.

Optionally, the first seal is a silicone elastomer, a polyurethane elastomer, a polyolefin elastomer, or an SBS elastomer.

Optionally, the blocking assembly has self-resetting property, and when no external force is applied, the blocking assembly is in the unblocking state or the blocking state; when the transmission piece moves along the axial direction, the state of the blocking component is driven to be switched by overcoming the self-resetting property of the blocking component.

Optionally, the transmission member includes a plurality of traction wires extending in the axial direction, and the plurality of traction wires are arranged circumferentially around the inner sheath; one end of the blocking component is connected with the plurality of traction wires, and the other end of the blocking component is connected with the outer sheath tube or the inner sheath tube.

Optionally, the delivery assembly further comprises a base and a driving wire, a distal end of the driving wire is connected with the traction wire, and a proximal end of the driving wire is fixed on the base; the base is provided with a platform section, and the driving wire is arranged at intervals with the platform section along the radial direction; the drive wire is configured to drive the pull wire toward the proximal end when pressed by an external force to move toward the platform segment.

Optionally, the conveying assembly further comprises a pressing assembly for pressing the driving wire to move the driving wire toward the platform section.

Optionally, the platform section extends along the axial direction, the drive wire and the axial of platform section are arranged at an angle, the base has the screw thread section arranged along the axial direction, the extrusion assembly with the screw thread section passes through screw thread adaptation and is connected, the extrusion assembly includes the briquetting, the briquetting is used for extruding the drive wire, the extrusion assembly realizes along axial removal through rotating around the screw thread section, so as to order about the drive wire towards the platform section removes.

Optionally, the base has a driving wire hole, the driving wire hole is used for the driving wire to penetrate through, and one end of the driving wire hole is communicated with the gap; the base further comprises a sealing table, the extrusion assembly moves between an initial position and a pressing position along the axial direction, and the extrusion assembly extrudes the driving wire in the process of moving from the initial position to the pressing position so as to enable the blocking assembly to be converted from the dredging state to the blocking state; and when the extrusion assembly is positioned at the pressing position, the extrusion assembly is abutted against the sealing table so as to seal the other end of the driving wire hole.

Optionally, the base has an accommodating hole penetrating axially, the inner sheath tube is inserted into the accommodating hole, a cavity is formed between the inner sheath tube and a hole wall of the accommodating hole at an interval, and the gap is communicated with the cavity; the delivery assembly further comprises a second sealing element annularly surrounding the inner sheath, and the squeezing assembly further squeezes the second sealing element during movement from the initial position to the pressing position such that the second sealing element radially expands to seal the proximal end of the cavity.

In order to solve the technical problem, the utility model provides an intervention blood pump system, it includes driving flexible axle, folding intervention blood pump and as above transport assembly, driving flexible axle movably wears to locate in the inner sheath pipe, driving flexible axle's distal end with intervention blood pump connects.

To sum up, in the utility model provides a conveying assembly and intervention formula blood pump system, conveying assembly includes: the device comprises an outer sheath tube, an inner sheath tube, a blocking component and a transmission component; the outer sheath tube is provided with a lumen, the inner sheath tube is movably arranged in the lumen in a penetrating way along the axial direction, and the distal end of the inner sheath tube is used for being connected with the intervention type blood pump; the external sheath tube is used for restraining radial expansion of the interventional blood pump and conveying the interventional blood pump to a target position, and at least part of gaps exist between the external sheath tube and the internal sheath tube; the blocking component is arranged on the outer sheath tube and/or the inner sheath tube; the occlusion assembly has an occlusion state and an unblocking state; when the blocking component is in the blocking state, the blocking component is abutted against the inner sheath tube to close a gap between the outer sheath tube and the inner sheath tube; when the occlusion assembly is in the unblocked state, unblocking the gap to allow the interventional blood pump to be received into the sheath; the transmission piece is movably arranged in the gap along the axial direction, the far end of the transmission piece is connected with the blocking assembly, and the transmission piece is used for moving along the axial direction so as to drive the blocking assembly to switch between the dredging state and the blocking state.

So the configuration can change the state of blocking the subassembly through the driving medium, blocks when the subassembly is in the mediation state, does not influence the folding income pipe of intervention formula blood pump, blocks when the subassembly is in the block state, can effectively obstruct blood and enter the clearance between interior sheath pipe and the outer sheath pipe, prevents the formation of thrombus.

Drawings

It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:

fig. 1 is a schematic view of an interventional blood pump system to which the present invention relates;

fig. 2 is a schematic view of an interventional blood pump according to the present invention;

fig. 3 is a schematic illustration of an interventional blood pump according to the present invention being introduced into a ventricle;

fig. 4 is a schematic view of a choke assembly according to an embodiment of the present invention in a unblocking state;

figure 5 is an axial cross-sectional view of a blocking assembly in a blocking state in accordance with an embodiment of the present invention;

fig. 6 is a schematic view of a blocking assembly according to an embodiment of the present invention in a blocking state;

FIGS. 7 a-7 c are schematic views of different shapes of pleats formed by different numbers of pull wires closing the first end of the closure according to embodiments of the present invention;

figures 8a and 8b are schematic views of a shutter with skirt flaps according to an embodiment of the invention;

fig. 9 is a schematic view of a base and drive wires of an embodiment of the invention;

FIG. 10 is an axial cross-sectional view of the base and drive wire of FIG. 9;

FIG. 11 is a schematic view of the drive wire of FIG. 10 being forced toward the platform section by an external force;

FIG. 12 is a schematic view of the base and drive wire shown in FIG. 9 engaged with the compression assembly, wherein the compression assembly is in an initial position;

FIG. 13 is a schematic view of the pressing assembly of FIG. 12 being screwed distally with the pressing assembly in a pressing position;

figure 14 is a schematic view of a plugging assembly according to another embodiment of the present invention in a unplugged state;

fig. 15 is an axial cross-sectional view of a plugging assembly according to another embodiment of the present invention in a unplugged state;

fig. 16 is an axial cross-sectional view of a blocking assembly according to another embodiment of the present invention in a blocking state;

fig. 17 is a schematic view of the base, drive wire, and compression assembly of another embodiment of the present invention.

In the drawings:

01-ascending aorta; 02-aortic valve; 03-left ventricle; 10-an interventional blood pump; 11-pigtail catheter; 12-a basket; 13-an impeller; 14-basket membrane; 15-a flow channel membrane; 20-a delivery assembly; 200-clearance; 21-a transmission flexible shaft; 22-inner sheath; 23-an outer sheath; 24-a blocking assembly; 241-an opening and closing member; 2411-a first end; 2412-a second end; 2413-leaking; 2414-skirt flap; 2415-triangular gap; 242-a mover; 243-first seal; 244-a fixture; 245-passing through the channel; 25-a transmission member; 251-a traction wire; 26-a base; 261-a platform section; 262-a threaded section; 263-drive wire hole; 264-sealing table; 2641-seal ring; 265-containment hole; 266-blind hole; 267-a bypass injection hole; 27-a drive wire; 28-a pressing assembly; 281-branch; 282-a baffle plate; 283-briquetting; 29-a second seal; 30-a drive assembly.

Detailed Description

To make the objects, advantages and features of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a," "an," and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a number of" are generally employed in a sense including "at least one," the terms "at least two" are generally employed in a sense including "two or more," and moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are present. Thus, a feature limited to "first," "second," or "third" may explicitly or implicitly include one or at least two of that feature, "one end" and "the other end" and "proximal end" and "distal end" generally refer to the corresponding two parts, including not only the endpoints. The terms "proximal" and "distal" are defined herein with respect to an interventional blood pump system having one end for intervention into the body and a manipulation end extending out of the body. The term "proximal" refers to a position of an element closer to a manipulation end of the interventional blood pump system outside the extension body, and the term "distal" refers to a position of an element closer to an end of the interventional blood pump system that is inserted into the human body and thus further away from the manipulation end of the interventional blood pump system. Alternatively, in a manual or hand-operated application scenario, the terms "proximal" and "distal" are defined herein with respect to an operator, such as a surgeon or clinician. The term "proximal" refers to a position of an element closer to an operator, and the term "distal" refers to a position of an element closer to an interventional blood pump system and thus further away from the operator. Furthermore, as used in the present application, the terms "mounted," "connected," and "disposed" on another element should be construed broadly, and generally only mean that there is a connection, coupling, fit, or drive relationship between the two elements, and that the connection, coupling, fit, or drive between the two elements can be direct or indirect through intervening elements, and should not be construed as indicating or implying any spatial relationship between the two elements, i.e., an element can be located in any orientation within, outside, above, below, or to one side of another element unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. Moreover, directional terminology, such as above, below, up, down, upward, downward, left, right, etc., is used with respect to the exemplary embodiments as they are shown in the figures, with the upward or upward direction being toward the top of the corresponding figure and the downward or downward direction being toward the bottom of the corresponding figure.

The following description refers to the accompanying drawings.

Referring to fig. 1, an interventional blood pump system is shown comprising: the blood pump comprises an interventional blood pump 10, a conveying assembly 20, a transmission flexible shaft 21 and a driving assembly 30; the interventional blood pump 10 is located distally for intervention into the human body. Referring to fig. 2, the proximal end of the interventional blood pump 10 is connected to the driving assembly 30 through the conveying assembly 20 and the flexible driving shaft 21, and the driving assembly 30 drives the impeller of the interventional blood pump 10 to move through the flexible driving shaft 21. Alternatively, in some embodiments, drive assembly 30 may be integrated into a handle. Optionally, the interventional blood pump system may further include other components, such as a control assembly, for monitoring and controlling the interventional blood pump system. The individual components of such an interventional blood pump system are well understood by those skilled in the art and will not be described in detail here.

Referring to fig. 3, in use, the interventional blood pump 10 in a compressed and folded state is introduced through the femoral artery via the delivery assembly 20, a portion of the distal end of the interventional blood pump 10 passes through the aortic valve 02 and into the left ventricle 03 via the descending aorta and the ascending aorta 01, and the delivery assembly 20 is operated to expand the interventional blood pump 10 from the compressed and folded state to an expanded state, and the impeller within the interventional blood pump 10 is actuated (e.g., rotated) by the distal drive assembly 30 to pump blood from the left ventricle 03 to the ascending aorta 01.

Referring to fig. 2, in an exemplary embodiment, the interventional blood pump 10 includes a pigtail catheter 11, a basket 12, an impeller 13, a basket membrane 14, and a flow conduit membrane 15, and the delivery assembly 20 includes an inner sheath 22 and an outer sheath 23. The pigtail catheter 11 is used for assisting the interventional blood pump 10 to be fixed in the left ventricle 03, ensuring that the part contacted with the ventricular wall is smooth and preventing the inner wall of the ventricle from being damaged. The basket 12 is made of a shape memory metal such as nitinol, which can be compressed, folded, and unfolded to expand, and in the unfolded state, serves to form a space for the impeller 13 to rotate. The impeller 13 can be made of flexible materials such as silica gel or rubber, and the basket covering film 14 can be coated on the outer wall of the framework main body of the basket 13 through processes such as thermal shrinkage or dip coating. The flow passage film 15 can be made of a flexible polymer film, the far end of the flow passage film 15 can be connected with the mesh basket covering film 14 in a thermal shrinkage or hot melting mode, and the near end of the flow passage film is connected with the inner sheath tube 22 to form a passage after blood is pumped out of the mesh basket 13. The near end of the basket 12 is assembled on the far end of the inner sheath tube 22, the transmission flexible shaft 21 is rotatably arranged in the inner sheath tube 22 in a penetrating mode, the far end of the transmission flexible shaft 21 is connected with the impeller 13, the near end of the transmission flexible shaft 21 is connected with the driving assembly 30, the driving assembly 30 can transmit power to the impeller 13 through the transmission flexible shaft 21, the impeller 13, the basket 12 and the flow channel membrane 15 form an axial flow pump structure, the impeller 13 rotates to generate suction force, and blood is pumped to the ascending aorta 01 from the left ventricle 03 through the aortic valve 02.

The basket 12, the impeller 13, the basket membrane 14, the runner membrane 15 and other components can be radially contracted or folded. The outer sheath 23 is movable relative to the inner sheath 22 along the axial direction, when the interventional blood pump 10 is loaded or is ready to be withdrawn after the operation is finished, the outer sheath 23 moves towards the far end to radially restrain all foldable parts of the interventional blood pump 10, so that the outer diameter of the interventional blood pump 10 is contracted to be not larger than the inner diameter of the outer sheath 23, and all the foldable parts are accommodated in the outer sheath 23 to finish folding and accommodating. The outer sheath 23 serves to constrain radial expansion of the interventional blood pump 10 and to deliver the interventional blood pump 10 to a target site, and the inventors have found that, due to the presence of the flow conduit membrane 15, the inner sheath 22 and the outer sheath 23 are at least partially gapped such that the flow conduit membrane 15 can be folded and contained therein. If the gap is not blocked, blood can enter the gap during the interventional use of the interventional blood pump 10, and thrombosis is caused due to the problems of long-time no flow, high temperature of the inner sheath tube 22 (the transmission flexible shaft 21 rotates at high speed during use, and generates certain friction with the inner sheath tube 22 to cause temperature rise), and the like, so that the safety of the operation is influenced.

Based on the above research, please refer to fig. 4 to fig. 13 in combination with fig. 1, an embodiment of the present invention provides a delivery assembly 20 for an interventional blood pump system, where the delivery assembly 20 includes: an outer sheath 23, an inner sheath 22, a blocking assembly 24 and a transmission member 25; the outer sheath 23 has a lumen, the inner sheath 22 is movably arranged through the lumen along the axial direction, and the distal end of the inner sheath 22 is used for connecting with the interventional blood pump 10; it should be noted that the axial direction is the direction of the central axis of the whole conveying assembly 20, and in practice, the conveying assembly 20 may be bent, and the axial direction is correspondingly bent. For example, in the state shown in fig. 1, the conveying assembly 20 is disposed in a horizontal direction, and the axial direction thereof is the horizontal direction in fig. 1, otherwise it can be understood with reference to fig. 1.

The blocking assembly 24 is disposed on one of the outer sheath 23 and the inner sheath 22; the obstruction assembly 24 has an obstruction state and an obstruction state; when the blocking assembly 24 is in the blocking state, the gap 200 between the outer sheath 23 and the inner sheath 22 is closed by abutting against the other one of the outer sheath 23 and the inner sheath 22; the obstruction assembly 24 is in the deoccluded state, releasing the abutment and the closure of the gap 200 to allow the interventional blood pump 10 to be received into the sheath 23; the transmission member 25 is axially movably disposed in the gap 200, a distal end of the transmission member 25 is connected to the blocking assembly 24, and the transmission member 25 is configured to axially move to drive the blocking assembly 24 to switch between the unblocking state and the blocking state. So dispose, can change the state of obstruction subassembly 24 through driving medium 25, when obstruction subassembly 24 is in the mediation state, do not influence the folding income pipe of intervention formula blood pump 10, when obstruction subassembly 24 is in the obstruction state, can effectively obstruct blood and get into the clearance 200 between interior sheath pipe 22 and the outer sheath pipe 23, prevent the formation of thrombus.

Referring to fig. 4-6, in an exemplary embodiment, the blocking assembly 24 includes a shutter 241 annularly surrounding the circumference of the inner sheath 22, the shutter 241 having a first end 2411 and a second end 2412 opposite to each other along the axial direction, the first end 2411 being a free end and connected to the transmission member 25. In the exemplary embodiment, the transmission member 25 includes a plurality of axially extending traction wires 251, and the second end 2412 is coupled to the distal end of the outer sheath 23. It should be noted that, here, the first end 2411 is connected with the pulling wire 251, which means that the pulling wire 251 is substantially fixed to the area of the first end 2411, and the pulling wire 251 is not limited to be fixed to the end surface of the first end 2411, and in practice, the pulling wire 251 may be fixed to the inner side wall of the opening and closing member 241 near the first end 2411. Thus, the first end 2411 can be expanded or contracted by the driving of the pull wire 251. With the occlusion assembly 24 in the unblocked state, the first end 2411 expands radially away from the inner sheath 22, and the entire shutter 241 has a flared shape that expands distally, at which point the shutter 241 allows the interventional blood pump 10 to fold and be received within the outer sheath 23. Further, the opening angle of the flared opening of the shutter 241 is selected to be between 30 ° and 45 °, and the opening angle is preferably larger than the proximal end angle of the basket 12, so that the interventional blood pump 10 can be smoothly folded into the sheath tube 23, and the resistance of the edge of the sheath tube 23 to the interventional blood pump 10 is reduced. When the interventional blood pump 10 is stored, the interventional blood pump 10 can be folded and stored in the outer sheath 23 only by pushing the outer sheath 23 to the far end and keeping the position of the inner sheath 22.

As shown in fig. 5 and 6, when the pull wire 251 is pulled proximally, the first end 2411 of the shutter 241 is pulled to move proximally and simultaneously contract radially inwardly to close until abutting against the inner sheath 22, thereby closing the gap 200 between the inner sheath 22 and the outer sheath 23, and the blocking assembly 24 is in a blocking state to prevent blood from entering the gap 200. It should be noted that, in the example shown in fig. 4 to 6, the opening/closing element 241 is annularly disposed at the distal end portion of the outer sheath 23 and extends towards the distal end, and after the inner sheath 22 penetrates into the outer sheath 23, it should be understood that the gap 200 also extends to the distal end portion of the opening/closing element 241 correspondingly, and at this time, a part of the pulling wire 251 extends to the distal end portion of the outer sheath 23 and enters into the inside of the opening/closing element 241, but it should be regarded as passing through the gap 200.

In the above examples shown in fig. 4 to 6, the second end 2412 of the shutter 241 is connected to the outer sheath 23 (i.e. the blocking component 24 is disposed on the outer sheath 23), it is understood that in other embodiments, the second end 2412 of the shutter 241 may also be connected to the outer peripheral wall of the inner sheath 22 (i.e. the blocking component 24 is disposed on the inner sheath 22), and the first end 2411 is located in the gap 200. Under the driving of the pulling wire 251, the first end 2411 can expand to abut against the inner wall of the outer sheath 23, so as to close the gap 200, and the blocking assembly is in a blocking state; the first end 2411 may also be retracted radially inward to form a space with the sheath 23, exposing the gap 200 to allow the interventional blood pump 10 to be received into the sheath 23 with the occlusion assembly in a unblocked state. In particular, the flared opening direction of the opening/closing member 241 is not limited to the distal expansion as shown in fig. 4 to 6, but may be a proximal expansion, and in the case where the opening/closing member 241 is connected to the inner sheath 22, it is particularly preferable to arrange the flared opening direction so as to expand proximally, and such an arrangement can effectively reduce the resistance of the opening/closing member 241 to the interventional blood pump 10 when the interventional blood pump 10 is accommodated in the outer sheath 23.

Preferably, the blocking assembly 24 has self-resetting property, and when no external force is applied, the blocking assembly 24 is in the unblocking state or the blocking state; the transmission element 25 is shifted in the axial direction in order to drive the blocking assembly 24 against the self-resetting property of the blocking assembly 24. It should be noted that the blocking assembly 24 may be in the unblocking state or in the blocking state when no external force is applied. And the state of the blocking assembly 24 is changed by the movement of the transmission member 25. After the driving force to the transmission member 25 is removed, the state of the blocking assembly 24 is restored to the original state under the self-resetting effect. For example, in the example shown in fig. 4-6, the blocking assembly 24 is in the unblocked state when no external force is applied, and the blocking assembly 24 is changed to the blocked state when the pull wire 251 is pulled. After the driving force to the pull wire 251 is removed, the blocking assembly 24 will return to the original unblocking state under the self-resetting effect. In other embodiments, such as the solution where the shutter 241 is connected to the inner sheath 22, the flared opening of the shutter 241 is configured to expand towards the proximal end, and the blocking assembly 24 is in the blocking state when no external force is applied, and the first end 2411 of the shutter 241 abuts against the inner wall of the outer sheath 23 to close the gap 200. Upon pulling of the pull wire 251, the occlusion assembly 24 changes to an unclogged condition. When the driving force on the pull wire 251 is removed, the blocking assembly 24 is restored to the original blocking state by the self-resetting function. The self-resetting property of the blocking assembly 24 can be achieved by the properties of the material itself, for example, the opening/closing member 241 is made of a material having elasticity and a certain deformation capability, such as silicone or rubber. In other embodiments, the opening/closing element 241 may also be self-resettable by an additional potential element, for example, a spring, a magnetic element, or other potential element may be additionally disposed to make the opening/closing element 241 in a specific state when no external force is applied. This can be configured by those skilled in the art in view of the practice.

Optionally, the transmission member 25 comprises a plurality of axially extending pulling wires 251, and the pulling wires 251 are circumferentially arranged around the inner sheath 22, preferably uniformly circumferentially distributed; one end of the blocking assembly 24 is connected to the plurality of pulling wires 251, and the other end of the blocking assembly 24 is connected to the outer sheath 23 or the inner sheath 22. Generally, the pull wire 251 is used for transmitting pulling force but not pushing force, and the blocking assembly 24 with self-resetting property can be matched to repeatedly change the state of the blocking assembly 24 back and forth. In other embodiments, the driving member 25 is not limited to include the pull wire 251, but may include a drive tube or a relatively stiff wire positioned in the gap 200 for transmitting not only the pulling force, but also the pushing force, in which case the blocking assembly 24 may not have self-resetting properties, which may be completely passively changed in state upon actuation of the driving member 25.

Referring to fig. 7a to 7c, when the first end 2411 of the opening/closing member 241 is pulled by the pulling wire 251 to deform, a portion near a connection point of the opening/closing member 241 and the pulling wire 251 will deform first, shrink toward the center and cling to the inner sheath 22, and a portion far from the connection point will deform less and may still maintain its original shape, thereby forming a wrinkle. As shown in fig. 7a, when the number of the pulling wires 251 is 4, wrinkles are more obvious, and the leak 2413 between the first end 2411 of the shutter 241 and the inner sheath tube 22 is more obvious, and the gap 200 is not tightly sealed. As shown in fig. 7b, when the number of the drawing wires 251 is 6, the number of the leaks 2413 is increased but the area is decreased. As shown in fig. 7c, when the number of the pulling wires 251 is large enough, the inner surface of the first end 2411 of the opening/closing member 241 can completely fit with the inner sheath tube 22 to achieve sealing without the existence of the leak 2413, and the outer contour of the first end 2411 of the opening/closing member 241 may still have some insignificant wrinkles, but does not affect the closing of the gap 200 and does not affect the use. It will be appreciated that the number of pull wires 251 is preferably greater than 6. Of course, if the transmission member 25 is a transmission pipe, the first end 2411 of the opening/closing member 241 can be continuously and uniformly urged in the circumferential direction, so that the gap 200 can be more tightly sealed.

Referring to fig. 8a and 8b, in another example, the shutter 241 has a plurality of circumferentially arranged skirt flaps 2414, when the blocking assembly 24 is in the unblocking state (as shown in fig. 8 a), a triangular gap 2415 is formed between adjacent skirt flaps 2414, and a corner of the triangular gap 2415 faces the second end 2412; when the occluding component 24 is in the occluded state (as shown in fig. 8 b), adjacent skirt flaps 2414 abut one another. When the opening and closing member 241 is closed, the plurality of skirt flaps 2414 can abut against each other, and at this time, the opening and closing member 241 does not form wrinkles, so that a leak 2413 is prevented, and the risk of blood leakage is prevented. It will be appreciated that in the unblocked configuration of the blocking assembly 24, the triangular gap 2415 is an isosceles triangle with the base at the first end 2411 and the apex toward the second end 2412 of the closure 241, and that the size and angle of the apex of the triangular gap 2415 can be adapted according to the number of the flaps 2414 and the configuration of the closure 241 when closed. Preferably, the skirt flaps 2414 correspond one-to-one to the pull wires 251.

Referring to fig. 9 to 13, the delivery assembly 20 further includes a base 26 and a driving wire 27, the base 26 is connected to the proximal end of the outer sheath 23, the distal end of the driving wire 27 is connected to the pulling wire 251, and the proximal end of the driving wire 27 is fixed to the base 26; the base 26 has a platform section 261, and the drive wire 27 is radially spaced from the platform section 261; the driving wire 27 is configured to drive the pulling wire 251 to move proximally when pressed by an external force to move toward the platform section 261. In one example, the driving wire 27 and the pulling wire 251 may be integrally formed, and the diameter and material of the driving wire and the pulling wire are the same, and in practice, the same wire may be divided into different sections. In the example shown in fig. 9-13, the platform 261 is an axially extending segment, and the driving wire 27 extends radially outward from the proximal end of the pulling wire 251 and then turns to extend proximally, and is radially spaced from the platform 261 when passing through the platform 261. As shown in FIG. 10, upon compression by an external force, the drive wire 27 moves toward the platform segment 261, which applies a pulling force to the pull wire 251, thereby driving the distally located occlusion assembly 24 to change state.

As shown in fig. 11 and 12, the conveying assembly 20 preferably further includes a pressing assembly 28, and the pressing assembly 28 is used for pressing the driving wire 27 to move the driving wire 27 toward the platform section 261. In some embodiments, the compression assembly 28 is removably coupled to the base 26, and the compression assembly 28, when assembled to the base 26, compresses the drive wire 27, thereby moving the pull wire 251 proximally. In other embodiments, the squeezing assembly 28 may be an additional component without being connected to the base 26, but the invention is not limited thereto.

Referring to fig. 11, 12 and 13, in an exemplary embodiment, the platform section 261 extends along an axial direction, the driving wire 27 is disposed at an angle with the axial direction of the platform section 261, the base 26 has a threaded section 262 disposed along the axial direction, the pressing member 28 is connected to the threaded section 262 by a screw thread, the pressing member 28 includes a pressing block 283, the pressing block 283 is used for pressing the driving wire 27, the pressing member 28 is moved along the axial direction by rotating around the threaded section 262 to drive the driving wire 27 to move towards the platform section 261, so that the driving wire 27 applies a pulling force to the pulling wire 251 to drive the blocking member 24 located at the distal end 251 to generate a state change. In the example shown in fig. 12 and 13, the drive wire 27 is angled inwardly from the distal end to the proximal end while the platform 261 remains axially extended, with the drive wire 27 being angularly spaced from the platform 261. Pressing member 28 is rotated to move distally, and pressing block 283 gradually presses against drive wire 27, thereby moving drive wire 27 toward platform section 261 and pulling pull wire 251. It will be appreciated that upon reverse rotation of the compression assembly 28, the compression assembly 28 moves proximally and the press block 283 gradually releases the compression on the drive wire 27, the occlusion assembly 24 returns to its original position in a self-resetting manner, and the drive wire 27 returns to its straightened position by the pull wire 251.

Optionally, the base 26 has a driving wire hole 263, the driving wire hole 263 allows the driving wire 27 to pass through, and one end of the driving wire hole 263 is communicated with the gap 200; the base 26 further comprises a sealing table 264, the pressing assembly 28 moves axially between an initial position (shown in fig. 12) and a pressing position (shown in fig. 13), and the driving wire 27 is pressed during the process of moving the pressing assembly 28 from the initial position to the pressing position, so that the blocking assembly 24 is switched from the unblocking state to the blocking state; and, when the pressing assembly 28 is in the pressing position, it abuts against the sealing table 264 to seal the other end of the driving wire hole 263. In the example shown in fig. 12 and 13, the base 26 has a through-hole 265 in the axial direction, the inner sheath 22 is inserted into the through-hole 265, the inner sheath 22 is spaced from the hole wall of the through-hole 265 to form a cavity, and the gap 200 is communicated with the cavity; one end of the drive wire hole 263 is open to the cavity and the other end extends radially and is folded open to the proximal end. The sealing land 264 is disposed at the distal end of the land section 261 in a ring shape around the axis of the base 26. Optionally, the sealing platform 264 has an annular sealing ring 2641, and the sealing ring 2641 is made of an elastic sealing material, such as silicone rubber. It will be appreciated that during an intervention, with the occluding component 24 in an open position and the distal end of the gap 200 in an open position, a significant amount of blood may enter the gap 200 and seep out of the other end of the drive wire aperture 263. After the intervention operation is finished, the other end of the driving wire hole 263 can be closed by the abutting of the pressing component 28 and the sealing platform 264, so that the problem that blood seeps out of the other end of the driving wire hole 263 is solved.

Optionally, the delivery assembly 20 further comprises a second sealing element 29, the second sealing element 29 is annular around the inner sheath 22, and during the process of moving the pressing assembly 28 from the initial position to the pressing position, the second sealing element 29 is further pressed, so that the second sealing element 29 radially expands to seal the proximal end of the cavity. The lumen between the inner sheath 22 and the wall of the receiving hole 265 also communicates with the gap 200, as shown in fig. 10, and in some embodiments, the proximal end of the lumen may also leak blood if not closed. In one example, the proximal end of the base 26 also has a blind bore 266 open to the proximal end, the bottom surface of the blind bore 266 at the distal end communicates with the receiving bore 265, and the compression assembly 28 includes a branch 281, the branch 281 being insertable into the blind bore 266. The arrangement is such that the outer periphery of the second seal 29 abuts the inner wall of the blind bore 266 and the distal end of the second seal 29 abuts the bottom surface of the distal end of the blind bore 266, the arrangement being such that during distal movement of the limb 281 with the compression assembly 28, the limb 281 will urge against the proximal side of the second seal 29, the second seal 29 being constrained by the inner wall of the blind bore 266 in its outer periphery and being able to expand only inwardly, i.e. to form a seal against the outer wall of the inner sheath 22, closing the proximal end of the lumen. Further, the second sealing member 29 can tightly hold the inner sheath 22 and the base 26 after abutting against the inner sheath 22, so that the outer sheath 23 and the base 26 can be relatively fixed with the inner sheath 22 due to the existence of friction, and the outer sheath 23 and the base 26 are prevented from moving in the using process.

It will be appreciated that the second seal 29 is made of a resilient sealing material, such as silicone rubber or the like. Optionally, the branch 281 and the second sealing member 29 may be connected by a baffle 282 to fit the shape of the second sealing member 29. So configured, the process of moving the extruding component 28 from the initial position to the pressing position can realize three functions, one is to drive the blocking component 24 at the far end to be switched from the dredging state to the blocking state, the other end of the driving wire hole 263 is closed, and the other end is to close the near end of the cavity. Optionally, the base 26 further has a side branch injection hole 267, the side branch injection hole 267 communicates with the accommodation hole 265. It will be appreciated that since the distal end of gap 200 is open during the interventional procedure, more blood is present in gap 200 after the interventional procedure is completed. At this time, the pressing member 28 is moved to the pressing position, the other end of the driving wire hole 263 and the proximal end of the closed cavity are closed, and after the opening/closing member 241 is closed, a one-way valve is formed, which can effectively prevent blood from entering the gap 200, but at this time, a perfusion fluid, such as heparinized physiological saline or glucose, is injected through the bypass injection hole 267, and when the injection pressure is increased to a certain degree, the opening/closing member 241 can be pushed open and flows out from the opening/closing member 241, and the perfusion fluid flows out from the opening/closing member 241 to the human body together with the blood previously flowing into the gap 200. After a certain amount of perfusate is perfused, the blood is flushed, and the flushing liquid is closed to realize the sealing of the whole pipeline.

Referring to fig. 14 to 16, in another embodiment, the blocking assembly 24 includes a moving member 242, a first sealing member 243 and a fixing member 244 arranged in sequence along an axial direction; the moving member 242 is axially movable and connected to a plurality of the traction wires 251; the first seal 243 is annular around the inner sheath 22, and the fixing member 244 is fixedly connected to one of the outer sheath 23 and the inner sheath 22; when the blocking assembly 24 is in the blocking state, the moving member 242 is driven by the pull wire 251 to move toward the fixing member 244, pressing the first sealing member 243 so that the first sealing member 243 radially expands to abut against the other one of the outer sheath 23 and the inner sheath 22.

In the example shown in fig. 15 and 16, the fixing member 244 is fixed to the inner sheath 22, and specifically, the fixing member 244 is fixed to the outer wall of the inner sheath 22. The first sealing element 243 is located at the distal end of the stationary element 244, and the moving element 242 is located at the distal end of the first sealing element 243. Optionally, the moving member 242 and the fixing member 244 are both annular around the inner sheath 22, the fixing member 244 and the first sealing member 243 have a plurality of axially penetrating through channels 245, and each through channel 245 is provided for movably penetrating one pull wire 251. It can be understood that the fixing members 244 are in one-to-one correspondence with and aligned with the through passages 245 of the first sealing member 243. The drawing wire 251 is fixed on the moving member 242 after passing through the fixing member 244 and the through passage 245 of the first sealing member 243. So configured, when the pull wire 251 is pulled proximally, the moving member 242 will be driven to move proximally to compress the first sealing member 243, and on the other hand, due to the blocking of the fixing member 244, the first sealing member 243 will expand radially outwardly after being compressed, as shown in fig. 16, the first sealing member 243 will abut against the inner wall of the outer sheath 23 after being compressed and expanded, and the blocking assembly is in the blocking state, and forms a seal for the gap 200. Optionally, the first sealing member 243 is self-resetting, such as elastic, and when the pulling force on the pull wire 251 is removed, the first sealing member 243 is elastically restored to the spaced state from the outer sheath 23, and the blocking assembly is in the unblocked state, exposing the gap 200 to allow the interventional blood pump 10 to be received into the outer sheath 23. It will be appreciated that the securing member 244 is not limited to being secured to the inner sheath tube 22, and in other embodiments, the securing member 244 may be secured to the inner wall of the outer sheath tube 23, wherein the first sealing member 243 will expand radially inwardly to abut the outer wall of the inner sheath tube 22 to seal the gap 200. In addition, the moving member 242, the first sealing member 243 and the fixing member 244 are not limited to be sequentially arranged from the distal end to the proximal end, but the three may also be arranged from the proximal end to the distal end, and at this time, the moving member 242 located at the proximal end can move towards the distal end under the thrust action to squeeze the first sealing member 243, if the moving member 242 can be connected with the transmission tube or the relatively hard metal wire. It will be appreciated that the moving member 242 and the first sealing member 243 need not be provided with through passages 245. In other embodiments, the first sealing element 243 may be in an expanded state when not subjected to external force, for example, in the case that the fixing element 244 is fixed to the inner sheath 22, the first sealing element 243 may abut against the inner wall of the outer sheath 23 to seal the gap 200 when not subjected to external force. The distal end of the first sealing member 243 is connected to the fixing member 244, the proximal end of the first sealing member 243 is connected to the moving member 242, the moving member 242 is connected to the pull wire 251, and the pull wire 251 is pulled proximally to axially stretch the first sealing member 243, so that the radial dimension of the first sealing member 243 is reduced to form a gap with the inner wall of the sheath 23, and the gap 200 is exposed to allow the interventional blood pump 10 to be accommodated into the sheath 23. Optionally, the first sealing member 243 is an elastomer, and this type of material deforms significantly under external stress and can be quickly restored to its original state and size after the stress is removed. In some embodiments, the first seal 243 may be, for example, a silicone elastomer, a polyurethane elastomer, a polyolefin elastomer, an SBS elastomer, or the like. Preferably, the material hardness of the first seal 243 should be between 30A and 60A, with a stress range of 100psi to 200psi at 100% strain. It is understood that the materials of the second sealing member 29, the opening/closing member 241 and the sealing ring 2641 can be the same or similar to the materials of the first sealing member 243.

Referring to fig. 17, there is shown another embodiment of the base 26, drive wire 27 and compression assembly 28 in which the base 26 is fixedly attached to the inner sheath tube 22. The distal end of the drive wire 27 is attached to the proximal end of the pull wire 251, and the proximal end of the drive wire 27 is secured to the base 26. Similarly, base 26 includes an axially extending platform segment 261, drive wire 27 is disposed at an angle to platform segment 261, compression assembly 28 includes a press block 283, and compression assembly 28 is threadably movably mounted to base 26. When the pressing component 28 is rotated, it produces an axial displacement relative to the base 26, and pushes the pressing block 283 to press the driving wire 27, so as to realize the traction on the pulling wire 251, and thus the blocking component 24 can be switched from the unblocking state to the blocking state. When the pressing assembly 28 is rotated in the reverse direction, the pulling wire 251 is moved distally by the elastic force of the first sealing member 243, so that the driving wire 27 is gradually straightened.

Based on transport assembly 20 as above, the embodiment of the utility model provides a still provide an intervention blood pump system, it includes transmission flexible axle 21, folding intervention blood pump 10 and as above transport assembly 20, transmission flexible axle 21 movably wears to locate in the inner sheath pipe 22, the distal end of transmission flexible axle 21 with intervention blood pump 10 connects. The specific structure and principle of the transmission flexible shaft 21 and the intervention type blood pump 10 can be understood by those skilled in the art according to the prior art, and the present invention will not be further explained.

To sum up, in the utility model provides a conveying assembly and intervention formula blood pump system, conveying assembly includes: the device comprises an outer sheath tube, an inner sheath tube, a blocking component and a transmission part; the outer sheath tube is provided with a tube cavity, the inner sheath tube is movably arranged in the tube cavity in a penetrating mode along the axial direction, and the far end of the inner sheath tube is used for being connected with an intervention type blood pump; the external sheath tube is used for restraining radial expansion of the interventional blood pump and conveying the interventional blood pump to a target position, and at least part of gaps exist between the external sheath tube and the internal sheath tube; the blocking component is arranged on the outer sheath tube and/or the inner sheath tube; the occlusion assembly has an occlusion state and an unblocking state; when the blocking component is in the blocking state, the blocking component is abutted against the inner sheath tube to close a gap between the outer sheath tube and the inner sheath tube; when the occlusion assembly is in the unblocked state, unblocking the gap to allow the interventional blood pump to be received into the sheath; the transmission piece is movably arranged in the gap along the axial direction, the far end of the transmission piece is connected with the blocking assembly, and the transmission piece is used for moving along the axial direction so as to drive the blocking assembly to switch between the dredging state and the blocking state. So the configuration can change the state that blocks the subassembly through the driving medium, blocks the subassembly and is in when mediation state, does not influence the folding income pipe of intervention formula blood pump, blocks the subassembly and is in when block state, can effectively the separation blood and get into the clearance between interior sheath pipe and the outer sheath pipe, prevents the formation of thrombus.

It should be noted that the above embodiments may be combined with each other. The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. A delivery assembly for an interventional blood pump system, comprising: the device comprises an outer sheath tube, an inner sheath tube, a blocking component and a transmission part;

the blocking assembly is disposed on one of the outer sheath and the inner sheath; the occlusion assembly has an occlusion state and an unblocking state; when the blocking assembly is in the blocking state, the blocking assembly abuts against the other one of the outer sheath tube and the inner sheath tube to close a gap between the outer sheath tube and the inner sheath tube; when the occlusion assembly is in the unblocked state, releasing the abutment and the closure of the gap to allow the interventional blood pump to be received into the sheath;

2. The delivery assembly of claim 1, wherein the blocking assembly includes a shutter member annularly disposed about a circumference of the inner sheath, the shutter member having axially opposed first and second ends, the first end being free and coupled to the drive member; the second end is connected with one of the outer sheath and the inner sheath;

3. The delivery assembly of claim 2, wherein the second end is coupled to a distal end portion of the sheath, and wherein the occlusion assembly is in the deoccluding state with the shutter member in a flared configuration that expands distally.

4. The delivery assembly of claim 3, wherein the shutter has a plurality of circumferentially arranged skirts, and wherein when the blocking assembly is in the unblocking position, a triangular gap is formed between adjacent skirts, and one corner of the triangular gap faces the second end; when the blocking assembly is in the blocking state, the adjacent skirt flaps are adjacent to each other.

5. The delivery assembly of claim 1, wherein the blocking assembly comprises a moving member, a first sealing member and a fixed member arranged in axial sequence; the moving piece is movable along the axial direction and is connected with the transmission piece; the first sealing element is annular around the inner sheath, and the fixing element is fixedly connected with one of the outer sheath and the inner sheath; when the blocking assembly is in the blocking state, the moving member moves towards the fixing member under the driving of the transmission member, and the first sealing member is pressed so that the first sealing member radially expands to abut against the other one of the outer sheath tube and the inner sheath tube.

6. The delivery assembly as set forth in claim 5 wherein said drive member includes a plurality of axially extending pull wires, said moving member and said stationary member are both annular about said inner sheath, said stationary member and said first sealing member having a plurality of axially extending through passages, each through passage providing for the movable passage of one of said pull wires.

7. The transfer assembly of claim 5, wherein the first seal is a silicone elastomer, a polyurethane elastomer, a polyolefin elastomer, or an SBS elastomer.

8. The delivery assembly of claim 1, wherein the blocking assembly is self-resetting, the blocking assembly being in the unblocked or blocked state in the absence of an external force; when the transmission piece moves along the axial direction, the state of the blocking component is driven to be switched by overcoming the self-resetting property of the blocking component.

9. The delivery assembly of claim 1 or 8, wherein the transmission member comprises a plurality of axially extending pull wires arranged circumferentially around the inner sheath; one end of the blocking component is connected with the plurality of traction wires, and the other end of the blocking component is connected with the outer sheath tube or the inner sheath tube.

10. The delivery assembly of claim 9, further comprising a base and a drive wire, a distal end of the drive wire being coupled to the pull wire, a proximal end of the drive wire being secured to the base; the base is provided with a platform section, and the driving wire is arranged at intervals with the platform section along the radial direction; the drive wire is configured to drive the pull wire to move proximally when squeezed by an external force to move toward the platform segment.

11. The conveyor assembly of claim 10, further comprising a compression assembly for compressing the drive wire to move the drive wire toward the platform segment.

12. The transport assembly of claim 11, wherein the platform section extends in an axial direction, the drive wire is disposed at an angle to the axial direction of the platform section, the base has a threaded section disposed in the axial direction, the extrusion assembly is threadedly engaged with the threaded section, the extrusion assembly includes a pressing block for pressing the drive wire, and the extrusion assembly is axially movable by rotation about the threaded section to urge the drive wire toward the platform section.

13. The delivery assembly of claim 11, wherein the base has a drive wire aperture through which the drive wire passes, and one end of the drive wire aperture communicates with the gap; the base further comprises a sealing table, the extrusion assembly moves between an initial position and a pressing position along the axial direction, and the extrusion assembly extrudes the driving wire in the process of moving from the initial position to the pressing position so as to enable the blocking assembly to be converted from the dredging state to the blocking state; and when the extrusion assembly is positioned at the pressing position, the extrusion assembly is abutted against the sealing table so as to seal the other end of the driving wire hole.

14. The conveying assembly according to claim 13, wherein the base has a receiving hole penetrating in the axial direction, the inner sheath tube is inserted into the receiving hole, the inner sheath tube and a hole wall of the receiving hole are spaced to form a cavity, and the gap is communicated with the cavity; the delivery assembly further comprises a second sealing element, the second sealing element is annular around the inner sheath, and the squeezing assembly further squeezes the second sealing element during movement from the initial position to the pressing position, so that the second sealing element radially expands to seal the proximal end of the cavity.

15. An interventional blood pump system, characterized in that, comprises a transmission flexible shaft, a foldable interventional blood pump and a conveying component according to any one of claims 1 to 14, wherein the transmission flexible shaft is movably arranged in the inner sheath tube in a penetrating way, and the distal end of the transmission flexible shaft is connected with the interventional blood pump.