Conveying device and conveying method of intervention pump

Abstract

The invention relates to the technical field of medical instruments, and discloses an intervention pump conveying device which comprises an expansion assembly, a conveying assembly and a pushing assembly, and the conveying assembly comprises a front end assembly and a rear end assembly which are detachably and fixedly connected; the expansion assembly is detachably and fixedly connected with the front end assembly, the front end assembly and the rear end assembly are connected to form an intervention channel allowing the pushing assembly to carry the intervention pump to penetrate through, and the pushing assembly is provided with a pushing channel allowing a pump line of the intervention pump to penetrate through in the axial direction. The pushing assembly can fix or loosen a pump line of the intervention pump so as to achieve pushing and releasing of the intervention pump. The invention further discloses another conveying method of the interventional pump. By constructing a split type collaborative structure, accurate pushing and stable releasing of the interventional pump are achieved, mechanical invasion and occupation to punctured blood vessels are reduced, the risk of complications such as thrombosis and bleeding is reduced, the surgical operation process is simplified, and the minimally invasive property and safety of interventional therapy are improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a delivery device and delivery method for an interventional pump. Background Technology

[0002] Interventional pumps, as a crucial type of medical device, play an irreplaceable core role in cardiovascular surgery and long-term cardiac support therapy. Depending on their placement within the human body, these devices can mechanically assist cardiac pumping or enhance renal perfusion, effectively ensuring the stability and continuity of blood circulation in patients. This is of great significance for the clinical treatment of critical illnesses such as heart and kidney failure.

[0003] However, existing interventional pumps have inherent structural design flaws. Their drive unit (motor) and pump cable are often rigidly integrated on the same axis in series, with the proximal end extending to form an operating handle. This integrated design introduces significant technical limitations in clinical implantation: once the interventional pump has completed its in vivo positioning and initiated hemodynamic support, the large-diameter delivery sheath used to guide the implantation cannot be removed in a timely manner. This sheath occupies the femoral artery lumen for an extended period, significantly increasing the risk of complications such as vascular injury, thrombosis, puncture site bleeding, or hematoma, and also easily leading to local puncture site infection. Furthermore, to prevent sheath displacement, patients must remain immobilized for a prolonged period post-operatively, severely restricting their freedom of movement and thus affecting the recovery process.

[0004] To address the issue of the inability to remove the delivery sheath due to the integrated design, a tearable sheath has been proposed as an improvement. This involves tearing the entire delivery sheath from the main body of the interventional pump after delivery, leaving only the pump cable inside the body during support. However, this improvement still has several drawbacks: the tearable sheath has a complex structure, making it extremely difficult to balance sealing and flexibility, and requiring stringent manufacturing precision and material properties; the tearing process requires significant external force, which can easily lead to further enlargement of the puncture wound and increase the risk of tissue damage; furthermore, the tearable sheath carries the risk of uneven tearing and breakage during the procedure. If the sheath is not completely torn or fragments remain inside the body, it will cause additional problems for clinical operations, significantly increasing the operator's workload and surgical risks. Summary of the Invention

[0005] The purpose of this invention is to provide a delivery device for an interventional pump. By configuring the delivery components as a front-end component and a rear-end component that are detachably and fixedly connected, and combining them with an expansion component that can be separated from the front-end component and a push component with a built-in push channel, a split collaborative structure is constructed. This solves the problems of the inability to remove the sheath and the high risk of vascular injury and infection in existing integrated interventional pump delivery devices. At the same time, by selectively fixing or loosening the interventional pump cable through the push component, the precise push and stable release of the interventional pump can be achieved, reducing mechanical invasion of the punctured blood vessel, reducing the risk of complications such as thrombosis and bleeding, simplifying the surgical procedure, and improving the minimally invasiveness and safety of interventional treatment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A delivery device for an interventional pump includes an expansion assembly, a delivery assembly, and a pushing assembly, wherein the delivery assembly includes a front end assembly and a rear end assembly that are detachably fixedly connected. The expansion component is detachably fixed to the front end component. After the front end component and the rear end component are connected, an intervention channel is formed through which the push component carries the intervention pump. The push component has an axial push channel through which the pump line of the intervention pump passes. The push component can fix or loosen the pump line of the intervention pump to realize the push and release of the intervention pump.

[0007] The aforementioned technical solution, by disassembling the delivery component into detachable front-end and rear-end components, and coordinating the expansion and pushing components, constructs a core architecture of "disassembled delivery - precise pushing - rapid withdrawal," completely resolving the technical pain point of the inability to remove the sheath in traditional integrated interventional pump delivery devices. The pushing channel design enables the orderly threading and fixation of the pump line, ensuring stability during the interventional pump's pushing process. Simultaneously, the ability to selectively fix or release the pump line balances pushing efficiency and release accuracy, significantly reducing the risk of vascular injury and providing a structural foundation for minimally invasive interventional therapy.

[0008] Preferably, the expansion assembly includes an expansion sheath and an expansion sheath seat fixedly connected to the proximal end of the expansion sheath.

[0009] Preferably, the distal end of the expansion sheath is a continuously variable diameter conical shape.

[0010] Preferably, the front end assembly includes a delivery sheath and a delivery sheath connection portion fixedly connected to the proximal end of the delivery sheath. The expansion sheath passes through the front end assembly and is in clearance fit with the delivery sheath. The distal end of the expansion sheath protrudes outward from the delivery sheath. The expansion sheath seat is detachably fixedly connected to the delivery sheath connection portion.

[0011] Preferably, the rear-end assembly includes a delivery sheath seat and a delivery sheath screw-on portion connected to the proximal end of the delivery sheath seat, wherein the delivery sheath seat and the delivery sheath connection portion are detachably fixedly connected.

[0012] Preferably, a first seal is installed at the position of the delivery sheath connection corresponding to the intervention channel; a second seal is installed at the position of the delivery sheath seat corresponding to the intervention channel; and a third seal is provided between the delivery sheath tightening part and the delivery sheath seat.

[0013] Preferably, the pushing assembly includes a pushing tube, a pushing seat fixedly connected to the proximal end of the pushing tube, and a pushing tightening part threadedly connected to the pushing seat; A fourth sealing ring is provided in the pusher seat corresponding to the pusher channel. A pusher block is provided at the end of the pusher tightening part facing the fourth sealing ring. The pump line of the intervention pump passes through the pusher channel and extends to the outside of the pusher assembly at its proximal end. When the motor tail of the intervention pump abuts against the distal end face of the pusher tube, the pusher tightening part is tightened. The pusher block axially compresses the fourth sealing ring, causing it to radially contract and deform to lock the pump line. When the pusher tightening part is loosened in the opposite direction, the pusher block releases the compression on the fourth sealing ring, and the fourth sealing ring resets to release the pump line.

[0014] Preferably, the pusher seat and the conveyor sheath screwing part are detachably fixedly connected.

[0015] Another objective of this invention is to provide a method for delivering an interventional pump. Relying on a split-type delivery device, it follows the core logic of "percutaneous intervention-sheath removal-connection". Through the step-by-step operation of guiding and positioning with an expansion component, constructing a pathway in segments with a delivery component, precisely pushing and selectively fixing or releasing the pump line with a push component, and finally removing the delivery component and the push component, this method avoids the inherent defects of existing technologies such as vascular damage, thrombosis, and infection caused by long-term placement of large-diameter sheaths. It simplifies the surgical procedure, improves the minimally invasiveness and safety of interventional treatment, and provides patients with a more reliable circulatory support solution.

[0016] To achieve another objective of this invention, the following technical solution is adopted: A delivery device and delivery method for an interventional pump, comprising the following steps using the aforementioned delivery device: S1: Securely connect the expansion component and the front-end component. After both are advanced along the guide wire to the target position, remove the expansion component and fix the front-end component in the relative position. S2: The front-end component and the back-end component are fixedly connected to form an intervention channel through which the push component carries the intervention pump; S3: Connect the push assembly to the interventional pump externally, and fix the pump cable of the interventional pump through the push assembly; S4: Push the pusher and the interventional pump along the interventional channel. After the interventional pump reaches the preset position, release the pump cable of the interventional pump through the pusher to release the interventional pump. S5: Fix the interventional pump, remove the delivery and pushing components from the proximal end of the interventional pump, and complete the delivery of the interventional pump.

[0017] In the above technical solution, the delivery method follows a logical flow of "expansion-channel establishment-fixation-pushing-release-withdrawal," and is adapted to a split delivery device to achieve the core solution of "percutaneous intervention-sheath removal-connection." The operation process is simple, reducing the difficulty for the operator. Early withdrawal of the expansion component avoids the risk of long-term indwelling of large-diameter sheaths. After the interventional pump is released, the delivery component and the pushing component are withdrawn simultaneously, significantly reducing the mechanical invasion of blood vessels by residual components in the body, reducing the risk of complications such as thrombosis and infection, while shortening the operation time and improving the postoperative recovery efficiency of patients.

[0018] The beneficial effects of this invention are: 1. This invention adopts a split structure design, which separates the delivery component into a detachable front end component and a rear end component, and works in conjunction with an independent expansion component and a pushing component, which simplifies the delivery process of the interventional pump, reduces the structural redundancy of traditional integrated delivery devices, makes the interventional path simpler, greatly reduces the difficulty of operation for the surgeon, and improves the convenience and efficiency of the surgical operation. 2. The delivery component and the component ultimately remaining in the blood vessel of the present invention significantly reduce mechanical invasion and damage to the punctured blood vessel; 3. Through the core design of "percutaneous intervention-sheath removal-release", the series of complications such as lower limb ischemia, puncture site infection, and bleeding caused by long-term indwelling of large-diameter sheaths in traditional techniques are avoided from the root, as well as the secondary risks caused by strict bed rest and immobilization of patients. This effectively improves the comfort of patients during treatment and accelerates the overall recovery process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the delivery device of an interventional pump disclosed in this invention; Figure 2 This is a schematic diagram of the expansion component. Figure 3 This is a schematic diagram of the conveying component. Figure 4 This is a structural diagram of the front-end components; Figure 5 This is a structural diagram of the backend components; Figure 6 This is a cross-sectional view of the conveyor assembly; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a diagram illustrating the interaction between the expansion component and the front-end component. Figure 9 This is a structural diagram of the push component; Figure 10 A cross-sectional view of the push component; Figure 11 for Figure 10 Enlarged view of point B in the middle; Figure 12 This is a schematic diagram of the intervention pump and pump line; Figure 13 A schematic diagram illustrating the interaction between the intervention pump, pump line, and push assembly; Figure 14 for Figure 13 Enlarged view of point D in the middle; Figure 15 This is a schematic diagram of the assembly of the delivery device and handle assembly of an interventional pump disclosed in this invention. Figure 16 This is an assembly cross-sectional view of the delivery device and handle assembly of an interventional pump disclosed in this invention. Figure 17 for Figure 16 Enlarged view of point C in the middle; Figure 18 This is a schematic diagram showing the connection between the intervention pump, pump line, and handle assembly.

[0020] Among them, 1. Expansion assembly, 11. Expansion sheath tube, 12. Expansion sheath seat, 2. Delivery assembly, 21. Front end assembly, 211. Delivery sheath tube, 212. Delivery sheath connection, 213. First seal, 22. Rear end assembly, 221. Delivery sheath seat, 222. Delivery sheath tightening part, 223. Second seal, 224. Third seal, 23. Intervention channel, 3. Push assembly, 31. Push channel, 32. Push tube, 33. Push seat, 34. Push tightening part, 35. Fourth sealing ring, 36. Propulsion block, 4. Intervention pump, 41. Pump line, 42. Motor tail, 43. Bracket, 51. First pin, 52. First slot, 53. Second pin, 54. Third pin, 55. Third slot, 6. Handle assembly. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] In the field of interventional medical devices, "distal" is defined as the end furthest from the operator during surgery, and "proximal" is defined as the end closest to the operator during surgery. "Axial" refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device, and "radial" refers to the direction perpendicular to the aforementioned axial direction.

[0023] like Figures 1 to 14 As shown, a delivery device for an interventional pump includes an expansion assembly 1, a delivery assembly 2, and a pushing assembly 3. The delivery assembly 2 includes a front end assembly 21 and a rear end assembly 22 that are detachably and fixedly connected. The expansion component 1 is detachably fixedly connected to the front end component 21. After the front end component 21 and the rear end component 22 are connected, an intervention channel 23 is formed for the push component 3 to carry the intervention pump 4 through. The push component 3 has an axially opened push channel 31 for the pump line 41 of the intervention pump 4 to pass through. The push component 3 can fix or loosen the pump line 41 of the intervention pump 4 to realize the push and release of the intervention pump 4.

[0024] In the above technical solution, by splitting the delivery component 2 into a detachable front-end component 21 and a rear-end component 22, and in conjunction with the collaborative design of the expansion component 1 and the pushing component 3, a core architecture of "split delivery - precise pushing - rapid withdrawal" is constructed, completely solving the technical pain point of the inability to remove the sheath in traditional integrated interventional pump 4 delivery devices. The setting of the pushing channel 31 enables the orderly threading and fixation of the pump line 41, ensuring the stability of the interventional pump 4 during the pushing process. At the same time, by selectively fixing or releasing the pump line 41, the pushing efficiency and release accuracy are balanced, significantly reducing the risk of vascular injury and providing a structural basis for minimally invasive interventional treatment.

[0025] It should be further explained that, in actual operation, firstly, the dilation component 1 and the front end component 21 are fixedly connected. After both are pushed together along the guide wire to the target position, the dilation component 1 is withdrawn and the front end component 21 is fixed in the relative position. The front end component 21 and the rear end component 22 are fixedly connected to form an interventional channel 23 through which the push component 3 carries the interventional pump 4. The push component 3 is connected to the interventional pump 4 externally, and the pump wire 41 of the interventional pump 4 is fixed by the push component 3. The push component 3 and the interventional pump 4 are pushed along the interventional channel 23. After the interventional pump 4 reaches the preset position, the pump wire 41 of the interventional pump 4 is released by the push component 3. The interventional pump 4 is fixed, and the delivery component 2 and the push component 3 are withdrawn from the proximal end of the interventional pump 4 to complete the delivery of the interventional pump 4.

[0026] In practice, this device is adapted to the preliminary procedures of routine clinical interventional surgery. After the operator completes the puncture, guidewire exchange and necessary vascular pre-dilation, the device can be used to carry out subsequent delivery operations.

[0027] Furthermore, the expansion assembly 1 includes an expansion sheath 11 and an expansion sheath seat 12 fixedly connected to the proximal end of the expansion sheath 11.

[0028] In the above technical solution, the dilation sheath 11 provides physical support for vascular dilation, and the dilation sheath seat 12 serves as a connecting carrier to achieve stable assembly with the front-end component 21. The design of the two fixedly connected ensures the structural integrity during the dilation process, avoids vascular damage caused by component separation, and lays a structural foundation for the rapid removal of the subsequent dilation component 1, thereby improving the continuity of the surgical operation.

[0029] It should be further noted that the expansion sheath 11 can be made of LDPE or PVC material, which has good flexibility and shape memory function, and the expansion sheath seat 12 can be made of HDPE material, which is fixedly connected to the proximal end of the expansion sheath 11 by welding or bonding.

[0030] Furthermore, the distal end of the expansion sheath 11 is a continuously variable diameter conical shape.

[0031] The above technical solution achieves multiple dilation functions through the design of a continuously variable diameter conical end, which is more guiding and facilitates precise advancement along the guidewire to the target position, improving the smoothness and safety of the dilation operation. It is especially suitable for complex clinical scenarios with vascular stenosis or tortuosity.

[0032] Furthermore, the front end assembly 21 includes a delivery sheath 211 and a delivery sheath connection portion 212 fixedly connected to the proximal end of the delivery sheath 211. The expansion sheath 11 passes through the front end assembly 21 and is in clearance fit with the delivery sheath 211. The distal end of the expansion sheath 11 protrudes outward from the outside of the delivery sheath 211. The expansion sheath seat 12 is detachably fixedly connected to the delivery sheath connection portion 212.

[0033] In the above technical solution, the expansion sheath 11 and the delivery sheath 211 are fitted with a gap of 0.1mm. On the one hand, the small gap of 0.1mm allows the expansion sheath 11 to be smoothly inserted and withdrawn along the delivery sheath 211 while forming a physical flow-limiting structure, effectively preventing a large outflow of blood and reducing the risk of intraoperative bleeding. On the other hand, this gap can avoid frictional resistance caused by excessive contact between the walls of the expansion sheath 11 and the delivery sheath 211, ensuring smooth operation when the expansion component 1 is withdrawn, preventing traction damage to the blood vessel wall due to friction, and avoiding blood leakage caused by an excessively large gap and component jamming caused by an excessively small gap, thus achieving an optimized balance between sealing and ease of operation.

[0034] It should be further noted that the delivery sheath 211 is made of one or more of PA, PTFE, HDPE, LDPE, Pebax, and other polymer materials. The delivery sheath connection 212 is bonded and fixed to the proximal end of the delivery sheath 211 with medical-grade adhesive.

[0035] It should also be noted that the connection between the expansion sheath seat 12 and the delivery sheath connection part 212 is as follows: Method 1: Threaded connection, where an external thread is machined at the connecting end of the expansion sheath seat 12, and a matching internal thread is machined at the corresponding end of the delivery sheath connecting part 212; Method 2: Snap-fit. First pins 51 are symmetrically fixed on both sides of the end of the expansion sheath seat 12. Two L-shaped first slots 52 are correspondingly formed circumferentially at the end of the delivery sheath connection part 212. During connection, the first pins 51 are aligned with the entrance of the first slot 52 and inserted. Then, the expansion sheath seat 12 is rotated to snap the first pins 51 into the limiting section of the first slot 52, achieving rapid fixation. During disassembly, the expansion sheath seat 12 is rotated in the opposite direction to disengage the first pins 51 from the limiting section and remove them along the entrance. This method allows for disassembly and assembly without tools, significantly improving surgical efficiency.

[0036] Furthermore, the rear end assembly 22 includes a delivery sheath seat 221 and a delivery sheath tightening part 222 connected to the proximal end of the delivery sheath seat 221, wherein the delivery sheath seat 221 and the delivery sheath connecting part 212 are detachably fixedly connected.

[0037] In the above technical solution, the rear component 22, through the structure of the delivery sheath seat 221 and the delivery sheath tightening part 222, achieves a stable connection with the front component 21 and provides an adaptation interface for the assembly of the push component 3. The detachable connection between the delivery sheath seat 221 and the delivery sheath connecting part 212 allows the interventional channel 23 to be quickly constructed after the expansion component 1 is withdrawn, shortening the operation time. At the same time, it improves the structural strength of the interventional channel 23, avoids channel deformation during the push process, and ensures the smooth advancement of the interventional pump 4.

[0038] It should be further explained that the connection method between the conveyor sheath seat 221 and the conveyor sheath connecting part 212 is as follows: Method 1: Threaded connection, the connecting end of the conveyor sheath seat 221 has external threads, and the corresponding end of the conveyor sheath connecting part 212 is machined with a matching internal thread; Method 2: Snap-fit ​​connection. A second pin 53 is symmetrically fixed on both sides of the end of the delivery sheath seat 221. Two L-shaped first slots 52 are correspondingly formed circumferentially at the end of the delivery sheath connecting part 212. During connection, the second pin 53 is inserted into the inlet of the first slot 52, and then the sheath seat 12 is rotated to expand it, causing the second pin 53 to snap into the limiting section of the first slot 52, achieving rapid fixation. During disassembly, the delivery sheath seat 221 is rotated in the opposite direction, causing the second pin 53 to disengage from the limiting section and be removed along the inlet. This method allows for disassembly and assembly without tools, significantly improving surgical efficiency.

[0039] Furthermore, a first seal 213 is installed on the delivery sheath connection 212 at the position corresponding to the intervention channel 23; a second seal 223 is installed on the delivery sheath seat 221 at the position corresponding to the intervention channel 23; and a third seal 224 is provided between the delivery sheath tightening part 222 and the delivery sheath seat 221.

[0040] In the above technical solution, the coordinated arrangement of the first sealing element 213, the second sealing element 223, and the third sealing element 224 constructs a full-process sealing protection system, effectively preventing blood leakage during delivery and reducing the risk of infection. The key node settings of each sealing element corresponding to the intervention channel 23 ensure sealing at each stage, including the withdrawal of the expansion component 1, the construction of the intervention channel 23, and the assembly of the pushing component 3. This solves the sealing leakage problem that easily occurs in disassembled structures. At the same time, the elastic design of the sealing elements does not affect the detachable operation of the components, balancing sealing performance and ease of operation.

[0041] It should be further explained that both the first seal 213 and the second seal 223 are integrally injection molded from medical-grade liquid silicone (LSR). This material has an extremely low Young's modulus (≤0.5MPa) and excellent high elastic recovery properties, while also possessing good biocompatibility and resistance to blood corrosion, making it suitable for use in the intra-intrauterine interventional environment. When the dilating sheath 11 is inserted, the seal deforms under the radial compression of the sheath, tightly adhering to the outer wall of the sheath to form an effective seal. When the dilating sheath 11 is withdrawn, thanks to the material's own high elastic recovery properties, the seal can almost 100% recover its original thickness and contact pressure in an instant (≤0.5s), quickly rebuilding the sealing interface of the interventional channel 23 and completely blocking the blood leakage path. The opening design of the seal is adapted to different insertion scenarios, including various structures such as petal shape, straight line, cross shape and star shape: the petal shape opening is adapted to the smoothness of sheath insertion and removal, reducing friction damage; the straight line and cross shape openings are suitable for sealing small diameter sheaths, with a more concentrated sealing contact area; the star shape opening takes into account the compatibility of multiple sheath sizes.

[0042] The third sealing element 224 is made of medical fluororubber and is located at the connection gap between the delivery sheath tightening part 222 and the delivery sheath seat 221. It is a lip-shaped sealing ring structure with the lip facing the inside of the intervention channel 23 and is sealed by a pre-compression amount of 0.5mm.

[0043] Furthermore, the pushing component 3 includes a pushing tube 32, a pushing seat 33 fixedly connected to the proximal end of the pushing tube 32, and a pushing tightening part 34 threadedly connected to the pushing seat 33; A fourth sealing ring 35 is provided in the push seat 33 corresponding to the push channel 31. A push tightening part 34 is provided with a push block 36 at one end facing the fourth sealing ring 35. The pump line 41 of the intervention pump 4 passes through the push channel 31 and extends to the outside of the push assembly 3 at its proximal end. When the motor tail 42 of the intervention pump 4 abuts against the distal end face of the push tube 32, the push tightening part 34 is tightened. The push block 36 axially compresses the fourth sealing ring 35, causing it to radially contract and deform to lock the pump line 41. When the push tightening part 34 is loosened in the opposite direction, the push block 36 releases the compression of the fourth sealing ring 35, and the fourth sealing ring 35 resets to release the pump line 41.

[0044] In the above technical solution, the mechanical locking and releasing function of the pump line 41 is realized through the structural arrangement of the push tightening part 34, the push block 36 and the fourth sealing ring 35. The locking force can be precisely adjusted by the tightening degree, avoiding damage to the pump line 41 by the traditional locking method. The radial shrinkage deformation design of the fourth sealing ring 35 can adapt to pump lines 41 of different diameters, improving the versatility of the device. The threaded push tightening part 34 is easy to operate. The operator can quickly complete the locking and releasing by rotating the part, shortening the operation time. At the same time, the locking state is stable, ensuring that the interventional pump 4 will not shift during the push process.

[0045] It should be further explained that the fourth sealing ring 35 is made of medical-grade LSR liquid silicone and is designed as a lip-shaped sealing ring structure. When the tightening part 34 is screwed on, the pusher block 36 at its end applies uniform pressure to the fourth sealing ring 35 axially, forcing the lip of the lip-shaped sealing ring to contract and deform radially inward. The inner edge of the lip tightly adheres to the outer wall of the pump line 41, forming a multi-layer sealing contact interface, and fixing and locking the pump line 41. When the tightening part 34 is screwed on in the opposite direction, the pusher block 36 releases the axial pressure, and the lip-shaped sealing ring, relying on its excellent elastic recovery performance, quickly restores its original lip structure. The lip disengages from the outer wall of the pump line 41, realizing the smooth release of the pump line 41. The entire deformation process is free of plastic deformation, and the sealing and release actions are precise and controllable. At the same time, its fatigue resistance and biocompatibility ensure the reliability and safety of the surgical procedure.

[0046] Furthermore, the push seat 33 is detachably and fixedly connected to the delivery sheath tightening part 222.

[0047] In the above technical solution, the detachable and fixed connection between the pusher seat 33 and the delivery sheath tightening part 222 achieves precise docking and locking of the pusher component 3 and the delivery component 2, ensuring their coaxiality during the push process, preventing deviation when the interventional pump 4 is advanced, and improving the accuracy of the release position. The detachable design allows the pusher component 3 to be withdrawn synchronously with the delivery component 2 after the interventional pump 4 is released, simplifying the withdrawal operation process and reducing secondary stimulation to blood vessels.

[0048] It should be further explained that the connection between the pusher seat 33 and the conveyor sheath tightening part 222 is as follows: Method 1: Threaded connection, the connecting end of the push seat 33 is machined with external threads, and the corresponding end of the conveying sheath tightening part 222 is machined with matching internal threads; Method 2: A third pin 54 is symmetrically fixed on both sides of the end of the push seat 33. Two L-shaped third slots 55 are correspondingly opened at the end of the delivery sheath tightening part 222. When connecting, the third pin 54 is inserted axially into the entrance of the third slot 55. Then, the push seat 33 is rotated so that the third pin 54 is engaged in the transverse limiting section of the third slot 55 to achieve quick positioning and fixation. When disassembling, the push seat 33 is rotated in the opposite direction so that the third pin 54 is disengaged from the limiting section and taken out axially along the entrance. Disassembly and assembly can be completed without additional tools, which is suitable for the operation requirements of quick locking and withdrawal during surgery.

[0049] Of course, in actual implementation, the push seat 33 and the conveying sheath tightening part 222 can be designed independently.

[0050] Another object of the present invention is to provide a delivery method for an interventional pump 4, employing the above-described delivery device, comprising the following steps: S1: Fix the expansion component 1 to the front end component 21, that is, fix the expansion sheath seat 12 to the delivery sheath connection part 212. After the two are pushed together along the guide wire to the target position, release the expansion sheath seat 12 and the delivery sheath connection part 212 to untie the front end component 21 and the expansion component 1. Remove the guide wire and the expansion component 1 and fix the front end component 21 in the relative position. At this time, you can hold the tail end of the front end component 21 to fix its position in the body. S2: The front end component 21 and the rear end component 22 are fixedly connected, that is, the delivery sheath connection part 212 and the delivery sheath seat 221 are fixedly connected to form an intervention channel 23 through which the push component 3 carries the intervention pump 4. S3: Connect the push assembly 3 to the interventional pump 4 outside the body, pass the proximal end of the interventional pump 4 and the pump line 41 through the push channel 31 of the push tube 32, and when the motor tail 42 of the interventional pump 4 contacts the push tube 32, rotate the push rotating part to compress the fourth sealing ring 35 to deform and fix the pump line 41 of the interventional pump 4. S4: Push the push assembly 3 and the intervention pump 4 along the intervention channel 23. After the intervention pump 4 reaches the preset position, rotate the push tightening part 34 to lock the delivery assembly 2 and the push assembly 3. At this time, the distal end of the stent 43 at the distal end of the intervention pump 4 is flush with the distal end face of the delivery sheath 211. Loosen the push tightening part 34 to release the pump line 41 and the push seat 33. At this time, the intervention pump 4 can move freely. Slowly push the pump line 41 along the delivery sheath 211. The pushing distance is the horizontal length that the stent needs to be deployed. Of course, the stent is an existing structure, and it can also be replaced with a balloon structure. S5: Fix the pump tubing of the interventional pump 4, remove the delivery component 2 and the pushing component 3 from the proximal end of the interventional pump 4, leaving only the interventional pump 4 in the body, and complete the delivery of the interventional pump 4.

[0051] In the above technical solution, the delivery method follows a logical flow of "expansion-channel establishment-fixation-pushing-release-withdrawal," and is adapted to a split delivery device to achieve the core solution of "percutaneous intervention-sheath removal-connection." The operation process is simple, reducing the difficulty for the operator. Early withdrawal of the expansion component 1 avoids the risk of long-term indwelling of a large-diameter sheath. After the interventional pump 4 is released, the delivery component 2 and the pushing component 3 are withdrawn simultaneously, significantly reducing the mechanical invasion of blood vessels by residual components in the body, reducing the risk of complications such as thrombosis and infection, while shortening the operation time and improving the postoperative recovery efficiency of patients.

[0052] It should also be noted that, such as Figures 15 to 18 As shown, in this embodiment, a handle assembly 6 can also be provided. The handle assembly serves as the power and control transmission carrier for the interventional pump 4. One end of the handle assembly has a detachable connection interface adapted to the proximal component of the interventional pump 4. The interface type can be a threaded connection or a snap-fit ​​structure consistent with the delivery sheath seat 221 and the pusher seat 33, ensuring connection stability and operational consistency. The handle assembly integrates a wire channel with medical-grade silicone insulated wires running through it for electrical connection between the interventional pump 4 and external power equipment. This handle assembly is optional and can be flexibly selected for assembly according to clinical treatment needs. During assembly, after the interventional pump 4 is released from the body via the delivery device and the delivery assembly 2 and pusher assembly 3 are removed, the handle assembly is quickly connected to the proximal component of the interventional pump 4, thereby realizing the power supply and operation control of the interventional pump 4, further expanding the clinical adaptability of the device.

[0053] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A delivery device for an interventional pump, characterized in that, It includes an expansion component (1), a conveying component (2) and a pushing component (3), wherein the conveying component (2) includes a front end component (21) and a rear end component (22) that are detachably fixedly connected. The expansion component (1) is detachably fixed to the front end component (21). After the front end component (21) and the rear end component (22) are connected, an intervention channel (23) is formed for the push component (3) to carry the intervention pump (4) through. The push component (3) has an axially oriented push channel (31) for the pump line (41) of the intervention pump (4) to pass through. The push component (3) can fix or loosen the pump line (41) of the intervention pump (4) to realize the push and release of the intervention pump (4).

2. The delivery device of the intervention pump according to claim 1, characterized in that, The expansion assembly (1) includes an expansion sheath (11) and an expansion sheath seat (12) fixedly connected to the proximal end of the expansion sheath (11).

3. The delivery device of the intervention pump according to claim 2, characterized in that, The distal end of the expansion sheath (11) is a continuously variable diameter conical shape.

4. The delivery device of the intervention pump according to claim 2 or 3, characterized in that, The front end assembly (21) includes a delivery sheath (211) and a delivery sheath connection (212) fixedly connected to the proximal end of the delivery sheath (211). An expansion sheath (11) passes through the front end assembly (21) and is in clearance fit with the delivery sheath (211). The distal end of the expansion sheath (11) protrudes out of the outside of the delivery sheath (211). The expansion sheath seat (12) is detachably fixedly connected to the delivery sheath connection (212).

5. The delivery device of the intervention pump according to claim 4, characterized in that, The rear assembly (22) includes a delivery sheath seat (221) and a delivery sheath screwing part (222) connected to the proximal end of the delivery sheath seat (221), and the delivery sheath seat (221) and the delivery sheath connection part (212) are detachably fixedly connected.

6. The delivery device of the intervention pump according to claim 5, characterized in that, A first seal (213) is installed at the position of the delivery sheath connection (212) corresponding to the intervention channel (23); a second seal (223) is installed at the position of the delivery sheath seat (221) corresponding to the intervention channel (23); a third seal (224) is provided between the delivery sheath tightening part (222) and the delivery sheath seat (221).

7. The delivery device for the intervention pump according to claim 1, 2, 3, 5 or 6, characterized in that, The push assembly (3) includes a push tube (32), a push seat (33) fixedly connected to the proximal end of the push tube (32), and a push tightening part (34) threadedly connected to the push seat (33). A fourth sealing ring (35) is provided in the push seat (33) corresponding to the push channel (31). A push tightening part (34) is provided with a push block (36) at one end facing the fourth sealing ring (35). The pump line (41) of the intervention pump (4) passes through the push channel (31) and extends to the outside of the push assembly (3) at its proximal end. When the motor tail (42) of the intervention pump (4) abuts against the far end face of the push tube (32), the push tightening part (34) is tightened. The push block (36) axially compresses the fourth sealing ring (35) to make it radially shrink and deform to lock the pump line (41). When the push tightening part (34) is loosened in the opposite direction, the push block (36) releases the compression of the fourth sealing ring (35), and the fourth sealing ring (35) resets to release the pump line (41).

8. The delivery device of the intervention pump according to claim 7, characterized in that, The push seat (33) is detachably fixed to the delivery sheath screwing part (222).

9. A delivery method using an intervention pump, characterized in that, The conveying device as described in any one of claims 1 to 8 comprises the following steps: S1: Fix the expansion component (1) and the front end component (21) together, and after they are pushed together along the guide wire to the target position, remove the expansion component (1) and fix the front end component (21) in the relative position; S2: The front-end component (21) and the back-end component (22) are fixedly connected to form an intervention channel (23) through which the push component (3) carries the intervention pump (4). S3: Connect the push assembly (3) to the interventional pump (4) outside the body and fix the pump line (41) of the interventional pump (4) through the push assembly (3). S4: Push the push component (3) and the intervention pump (4) along the intervention channel (23). After the intervention pump (4) reaches the preset position, release the pump line (41) of the intervention pump (4) through the push component (3) to release the intervention pump (4). S5: Fix the interventional pump (4), remove the delivery component (2) and the push component (3) from the proximal end of the interventional pump (4) to complete the delivery of the interventional pump (4).

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