A connection structure of an interventional pump, a delivery handle and an interventional pump

Abstract

The application relates to the technical field of medical devices and discloses a connecting structure of an interventional pump, which comprises an adapter, a flushing channel being arranged through the adapter in the axial direction, an insulating tube being fixedly sleeved on the small-diameter outer periphery of the adapter, a welding wire group comprising at least two welding wires, one end of each welding wire being welded in one-to-one correspondence with a pump wire of the interventional pump, a connecting terminal group comprising at least two connecting terminals, each connecting terminal being welded in one-to-one correspondence with the other end of the welding wire and being fixed to the outside of the insulating tube, a plurality of insulating pieces being fixedly sleeved on the outside of the insulating tube at intervals, the insulating pieces being located between two adjacent connecting terminals, a heat-shrinkable tube being fixedly sleeved on the large-diameter section of the adapter, and the covering area of the heat-shrinkable tube containing the welding position of the welding wire and the pump wire, an adapter sleeve being fixedly sleeved on the outside of the insulating tube, and one end of the adapter sleeve being abuttingly fixed to the end part of the connecting terminal group. The split connecting structure and the delivery handle replace the tearable sheath, the interventional operation is simplified, and the operation safety and convenience are improved.

Description

Technical Field

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

[0002] Interventional pumps are key medical devices in cardiovascular surgery and long-term cardiac support therapy. Depending on the placement location in the body, they can mechanically drive the heart to pump blood or provide renal perfusion, effectively ensuring the stability and continuity of the patient's blood circulation. They have irreplaceable application value in the clinical treatment of diseases such as heart and kidney failure.

[0003] Existing interventional pump delivery systems generally employ a structure where the pump body is fixed in series with the rear end of the handle via a catheter, such as the interventional blood pump with bend adjustment function disclosed in CN202210992709.9. During interventional procedures, this series structure makes the entire delivery system bulky and lacks flexibility, not only obstructing the operator's field of vision but also increasing the difficulty of pushing and adjusting the pump body within the blood vessel. Furthermore, because the handle, catheter, and pump body are rigidly connected, the delivery sheath used to guide the pump body into the target location in the body cannot be separated from the pump tube after the pump body is in place. The sheath must remain in the patient's body in linkage with the handle and the pump body, meaning it must remain in the patient's body throughout the entire pump treatment cycle. This sheath-based treatment method increases the risk of wound infection and affects the patient's postoperative activity and vascular recovery.

[0004] To address the aforementioned issues with indwelling sheaths, related technical fields have proposed improved solutions for tearable delivery sheaths. These solutions utilize special structural designs (such as pre-designed tear seams and matching tear cords) and material selection (such as high-toughness, fracture-resistant medical polymer materials) to create a separable structure between the sheath head and the main body. After the interventional pump pushes the sheath to the target location, external force tears it off from the pump tubing, thus preventing long-term indwelling of the sheath within the body. However, the tearable sheath structure still presents the following problems:

[0005] 1. The design is complex, and its sealing and flexibility design is extremely difficult, which puts forward stringent requirements on the precision of manufacturing process and material properties, resulting in high production costs;

[0006] 2. The tearing procedure requires the application of significant external force, which can easily cause the surgical wound to enlarge and increase the risk of tissue damage.

[0007] 3. In practical applications, tearable sheaths carry the risk of uneven tearing and breakage. If the sheath is not completely torn or fragments remain in the body, it can cause postoperative complications and significantly increase the surgeon's workload and surgical risks. Summary of the Invention

[0008] The purpose of this invention is to provide a connection structure for an interventional pump, which enables stable conduction and reliable fixation of the pump line to the external circuit, and ensures the insulation safety of the circuit.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A connection structure for an interventional pump, comprising:

[0011] The adapter is a stepped rod-shaped component with a flushing channel running through it along its axial direction. The adapter is fixedly connected to the interventional pump conduit.

[0012] The insulating tube is a tubular structure that is fixedly sleeved on the small-diameter outer circumference of the adapter.

[0013] The welding line assembly includes at least two welding lines, one end of each welding line being welded to the corresponding pump line of the intervention pump.

[0014] A terminal block assembly includes at least two terminals, each of which is welded to the other end of a welding wire and fixed to the outside of an insulating tube.

[0015] The insulating components are multiple and fixedly sleeved on the outside of the insulating tube at intervals, with the insulating components located between two adjacent connecting terminals;

[0016] Heat shrink tubing is fixedly sleeved on the outer periphery of the large-diameter section of the adapter, and the coverage area of ​​the heat shrink tubing includes the weld joint between the welding line and the pump line.

[0017] The adapter sleeve is fixedly sleeved on the outside of the insulating tube, with one end of the adapter sleeve abutting against the end of the connecting terminal group.

[0018] In the above technical solution, the adapter is fixedly connected to the catheter of the interventional pump, forming the proximal component of the interventional pump (in medical devices, the part closer to the surgeon is the proximal end, and the part farther from the surgeon is the distal end). A flushing channel is axially integrated into the adapter, connecting to the flushing line of the catheter, forming part of the internal flushing flow path of the interventional pump system. Insulating tubing, in conjunction with insulating components, provides electrical isolation between adjacent connection terminals, preventing short circuits. The welding wires are welded one-to-one with the pump wires and connection terminals, establishing a stable power and signal transmission path, ensuring reliable electrical connection of the pump wires, and meeting the requirements for power transmission and signal feedback. Heat shrink tubing covers the weld joints, strengthening the structural rigidity of the weld between the pump wires and the welding wires, while also providing insulation protection to prevent wire detachment or insulation failure due to external forces. The adapter sleeve abuts against the connection terminal group, achieving axial positioning and fixation of each component, preventing component displacement due to vibration or pushing forces during interventional procedures. The connection structure ensures stable conduction and reliable fixation between the pump line of the interventional pump and the external circuit, guaranteeing the insulation safety of the circuit.

[0019] Preferably, the large-diameter section of the adapter has a circumferential groove, and the welding joint of the pump line and the welding line is located inside the groove.

[0020] Preferably, the connecting terminal group includes a first terminal, a second terminal, and a third terminal, and the first terminal, the second terminal, and the third terminal are respectively welded to the welding wire one by one;

[0021] The first terminal and the first accessory form a ring structure, the second terminal and the second accessory form a ring structure, and the third terminal is an independent ring structure;

[0022] The first component has a first through slot for the welding line to pass through, and the second component has a second through slot for the welding line to pass through.

[0023] Preferably, an injection port is provided on the heat shrink tubing, through which adhesive is filled into the inner side of the heat shrink tubing, the inner side of each insulating component, the enclosing gap between the first terminal and the first accessory, the enclosing gap between the second terminal and the second accessory, and the inner circumference of the third terminal.

[0024] Another objective of this invention is to provide a delivery handle for an interventional pump, enabling rapid docking with the connection structure of the interventional pump, simplifying the operator's procedure, reducing equipment redundancy, and achieving a sheathless interventional treatment mode in conjunction with the connection structure, thereby improving surgical safety and convenience, reducing the operator's workload and the patient's postoperative recovery risk.

[0025] To achieve the above objectives, the present invention adopts the following technical solution:

[0026] A delivery handle for an interventional pump, comprising:

[0027] The handle housing has a handle cavity for housing the aforementioned connection structure;

[0028] The conversion circuit board is fixed inside the handle housing;

[0029] The ejector pin assembly includes ejector pins that correspond one-to-one with the connection terminals of the connection terminal assembly. The ejector pins are connected to the conversion circuit board via wires. Each ejector pin is fixed to an ejector pin insulator, which is fixed to a fixing plate. The handle housing has ejector pin holes through which the ejector pin insulator passes, and the ejector pin holes are connected to the handle cavity.

[0030] A lifting mechanism is installed on the handle housing and is used to drive the fixed plate to rise or fall along the height direction of the handle housing.

[0031] In the above technical solution, the lifting structure drives the fixed plate to rise along the height direction of the handle shell, which in turn drives the ejector pin to move upward. The connecting structure is inserted into the handle cavity. The lifting structure drives the fixed plate to fall along the height direction of the handle shell, so that the ejector pins of the ejector pin assembly and the connecting terminals of the connecting terminal assembly make contact one-to-one. The ejector pins and the conversion circuit board are connected by wires. With the insulation effect of the ejector pin insulator, a safe and stable electrical conduction path is constructed. The conversion circuit board realizes the processing and transmission of external power and control signals, which meets the functional requirements of motor drive and parameter monitoring.

[0032] The lifting structure drives the fixed plate to rise and fall, enabling rapid contact or separation between the pin and the connecting terminal. This makes the docking operation between the connecting structure and the delivery handle more convenient, replacing the rigid connection of the traditional integrated design. It simplifies the operator's intervention process, while the detachable design allows the delivery handle to be reused, reducing medical costs.

[0033] Preferably, the handle housing includes:

[0034] The bottom shell and the handle cavity are opened on the bottom shell. A sealing element is fixedly installed at one end of the bottom shell. The sealing element has an opening that passes through the handle cavity. The bottom shell has a mounting cavity for installing the lifting structure.

[0035] The side shell is fixed to one side of the bottom shell, and the side shell has a flushing liquid inlet that runs through the opening.

[0036] The upper shell is fixed above the lower shell and together with the lower shell forms a receiving cavity. The conversion circuit board and the ejector pin assembly are located in the receiving cavity. The lower shell has a connecting hole that communicates with the mounting cavity and the receiving cavity and allows the fixing plate to pass through.

[0037] Preferably, the lifting structure includes:

[0038] The top block is fixed to the upper end of the mounting cavity and has a sliding hole.

[0039] The stepped shaft is fixedly connected to the fixed plate, and its small-diameter section is slidably fitted with the sliding hole.

[0040] The pull button is located on the upper outer side of the handle and is fixed to the small-diameter section of the stepped shaft;

[0041] A spring is fitted onto the outside of the small-diameter section of the stepped shaft, with both ends abutting against the top block and the step surface of the stepped shaft, respectively.

[0042] Preferably, a locking rod is fixed at the lower end of the stepped shaft, and a clearance hole is provided in the bottom shell for the locking rod to pass through.

[0043] Another objective of this invention is to provide an interventional pump that, through the precise adaptation and coordinated operation of the connection structure of the interventional pump and the delivery handle, enables an interventional mode without sheath placement, simplifying the operation process and reducing equipment redundancy.

[0044] To achieve the above objectives, the present invention adopts the following technical solution:

[0045] An interventional pump includes the aforementioned connecting structure, delivery handle, and pump head. The connecting structure is detachably placed inside the handle cavity of the delivery handle, and the connecting terminal group is in corresponding contact with the ejector pin group. The pump head is fixedly connected to the adapter of the connecting structure through a conduit.

[0046] In the above technical solution, a complete interventional pump system is formed by combining the connecting structure, delivery handle, and pump head. The detachable design of the connecting structure and delivery handle replaces the traditional integrated structure of the pump body connected to the handle via a catheter and the tearable sheath intervention method, greatly simplifying the surgical procedure, reducing the complexity of the delivery system, and improving the convenience of interventional operations. The corresponding contact and conduction between the connecting terminal group and the ejector pin group ensure stable transmission of motor drive and signal feedback, meeting the precise control requirements of the interventional pump. The pump head is fixedly connected to the adapter via a catheter, and the flushing channel of the adapter simplifies and facilitates the smooth operation of the flushing system, effectively reducing the risk of thrombosis in the pump head bearing. The entire system eliminates the need for indwelling sheaths, avoiding problems such as wound infection, limb movement restriction, and impaired vascular repair caused by indwelling sheaths. It also avoids the risks of wound enlargement and fragment residue caused by tearing of the tearable sheath, improving the safety of clinical treatment and the postoperative recovery of patients. Attached Figure Description

[0047] Figure 1 A schematic diagram of the interventional pump after the delivery handle has been removed;

[0048] Figure 2 for Figure 1 A structural diagram from another location;

[0049] Figure 3 for Figure 2 Exploded view after removing the pump head and conduit;

[0050] Figure 4 A cross-sectional view of the interventional pump after the delivery handle has been removed;

[0051] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0052] Figure 6 This is a structural schematic diagram of the adapter;

[0053] Figure 7 This is a structural diagram of the first terminal, the first accessory, the second terminal, the second accessory, and the third terminal;

[0054] Figure 8 A schematic diagram of the delivery handle of the intervention pump;

[0055] Figure 9 Exploded view of the delivery handle of the interventional pump after the upper casing has been removed;

[0056] Figure 10 A cross-sectional view of the delivery handle of the intervention pump;

[0057] Figure 11 This is a schematic diagram of the ejector pin assembly and part of the lifting structure.

[0058] Figure 12 This is a schematic diagram of the interventional pump.

[0059] Figure 13 This is a cross-sectional view of the interventional pump;

[0060] Figure 14 for Figure 13 Enlarged view of point B in the middle;

[0061] Figure 15 for Figure 13 Enlarged view of point C in the middle;

[0062] Figure 16 for Figure 13 Enlarged diagram of point D in the middle.

[0063] Among them, 1. Adapter, 2. Flushing channel, 3. Conduit, 4. Insulating tube, 5. Welding wire, 6. Pump wire, 7. Insulating component, 8. Heat shrink tubing, 9. Adapter sleeve, 10. Groove, 11. First terminal, 12. Second terminal, 13. Third terminal, 14. First accessory, 15. Second accessory, 16. First through groove, 17. Second through groove, 18. Filling port, 19. Handle cavity, 20. Conversion circuit board, 21. Ejector pin, 22. Ejector pin insulating component, 23. Fixing plate, 24. Top 25. Pinhole, bottom shell, 26. Seal, 27. Opening, 28. Mounting cavity, 29. Side shell, 30. Fluid inlet, 31. Top shell, 32. Receiving cavity, 33. Connecting hole, 34. Top block, 35. Stepped shaft, 36. Pull button, 37. Spring, 38. Locking rod, 39. Locking port, 40. Pump head, 41. Flushing pipeline, 42. Motor shaft and rear bearing clearance, 43. Motor inner cavity, 44. Motor shaft and front bearing clearance, 45. Bearing and impeller clearance, 46. Wire insulation tube. Detailed Implementation

[0064] The present invention will now be described in further detail with reference to the accompanying drawings.

[0065] like Figure 1-7 As shown, a connection structure for an interventional pump includes:

[0066] The adapter 1 is a stepped rod shape with a flushing channel 2 running through it along its axial direction. The adapter 1 is fixedly connected to the interventional pump conduit 3.

[0067] The insulating tube 4 is a tubular structure and is fixedly sleeved on the small-diameter outer periphery of the adapter 1;

[0068] The welding line assembly includes at least two welding lines 5, one end of each welding line 5 is welded to the pump line 6 of the intervention pump in a one-to-one correspondence.

[0069] The connecting terminal group includes at least two connecting terminals, each of which is welded to the other end of the welding wire 5 and fixed to the outside of the insulating tube 4.

[0070] The insulating element 7 is a plurality of fixedly sleeved on the outside of the insulating tube 4 at intervals, and the insulating element 7 is located between two adjacent connecting terminals;

[0071] Heat shrink tubing 8 is fixedly sleeved on the outer periphery of the large-diameter section of the adapter 1, and the coverage area of ​​heat shrink tubing 8 includes the weld joint between welding line 5 and pump line 6.

[0072] The adapter sleeve 9 is fixedly sleeved on the outside of the insulating tube 4, and one end of the adapter sleeve 9 is pressed against the end of the connecting terminal group.

[0073] In the above technical solution, the adapter 1 is fixedly connected to the catheter 3 of the interventional pump, forming the proximal component of the interventional pump (in medical devices, the part closer to the surgeon is the proximal end, and the part farther from the surgeon is the distal end). A flushing channel 2 is axially provided in the adapter 1, which connects to the flushing pipe of the catheter 3, forming part of the internal flushing flow path of the interventional pump system. The insulating tube 4, in conjunction with the insulating component 7, achieves electrical isolation between adjacent connection terminals, preventing short circuits. The welding wire assembly is welded one-to-one with the pump wire 6 and the connection terminals, constructing a stable power and signal transmission path, ensuring reliable electrical connection of the pump wire 6, and meeting the requirements for power transmission and signal feedback. The weld joint is covered by heat shrink tubing 8, strengthening the structural rigidity of the weld between the pump wire 6 and the welding wire 5, while also providing insulation protection to prevent wire detachment or insulation failure caused by external forces. The adapter sleeve 9 presses against the connection terminal assembly, achieving axial limiting and fixing of each component, preventing component displacement due to vibration or pushing force during interventional operations. The connection structure ensures stable conduction and reliable fixation between the pump line 6 of the intervention pump and the external circuit, guaranteeing the insulation safety of the circuit.

[0074] It should be further explained that the end of the adapter 1 used to connect with the conduit 3 is the large-diameter section of the adapter 1. The end of the large-diameter section is radially recessed and inserted into the conduit 3. This end is bonded and fixed to the conduit 3 with epoxy adhesive. After fixing, the flushing channel 2 of the adapter 1 is connected to the flushing pipeline of the conduit 3, which facilitates the passage of flushing fluid. The insulating tube 4 is bonded and fixed to the outer periphery of the small-diameter section of the adapter 1 with epoxy adhesive.

[0075] The welding wire assembly typically uses two or three welding wires 5. When two welding wires 5 are selected, they are connected to the positive and negative terminals of the motor, respectively. Here, the positive and negative terminals of the motor are the pump wires 6 in this application, providing power supply. In this embodiment, three welding wires 5 are selected, along with three connection terminals and three pins 21. Two welding wires 5 are connected to the positive and negative terminals of the motor, respectively, while the third wire is used for signal feedback / control, such as monitoring motor speed and temperature, to meet the high-precision requirements of cardiovascular surgery.

[0076] The insulating component 7 is made of ceramic sleeve, and there are three insulating components 7, which are used to insulate the three connection terminals.

[0077] The heat shrink tubing 8 can be made of medical-grade cross-linked polyolefin material and is fixedly sleeved on the outer periphery of the large diameter section of the adapter 1 by heat shrinking. Its coverage area completely wraps the weld between the pump wire 6 and the welding wire 5.

[0078] The adapter sleeve 9 is made of ceramic and is bonded to the outside of the insulating tube 4 with epoxy adhesive.

[0079] In specific operation, the three welding wires 5 are first welded to the connecting terminals respectively. The ceramic sleeves are then inserted sequentially into the adapter 1 with the insulating tube 4 and spaced apart. The connecting terminals are fixed to the outside of the insulating tube 4 and spaced and insulated by the ceramic sleeves. The pump wire 6 is soldered to the welding wire 5 to realize the connection of the motor lead of the intervention pump.

[0080] Of course, in specific implementation, before welding the welding wire 5 and the pump wire 6, a medical-grade wire insulation tube 46 can be sleeved on the outside of each welding wire 5. The material can be PTFE or medical silicone. The welding wire 5 and the pump wire 6 are welded one by one using tin soldering or silver soldering. After the welding is completed, wait for the welded area to cool to room temperature, and then move the wire insulation tube 46 to the welded area of ​​the welding wire 5 and the pump wire 6 so that the wire insulation tube 46 covers the welded area to achieve insulation of the welded area, avoid the welded point from contacting other components and causing short circuits, and improve the reliability and stability of the electrical connection. After the heat shrink tubing 8 is heat-shrinked to the outside of the weld, the wire insulation tube 46 has formed an inner layer to wrap around the weld and fill the tiny protrusions at the weld. Combined with the tight fit of the outer layer of the heat shrink tubing 8, the surface transition in this area is smoother and flatter, without obvious discontinuities or sharp edges. This facilitates the pushing and adjustment of the connecting structure in the blood vessel during intervention, reduces frictional damage to the blood vessel wall, and provides a regular surface for subsequent glue filling, avoiding glue accumulation or voids during filling, further improving the overall sealing and firmness of the structure.

[0081] Furthermore, the large-diameter section of the adapter 1 has a circumferential slot 10, and the welding joints of the pump line 6 and the welding line 5 are located within the slot 10.

[0082] In the above technical solution, a groove 10 is circumferentially opened in the large-diameter section of the adapter 1 to accommodate the welding joint of the pump line 6 and the welding line 5, effectively limiting the welding area and preventing the welding point from detaching or breaking due to external impact or bending, thus improving the reliability of the electrical connection. The grooves 10 are evenly distributed around the circumference, making the welding operation easier to position and ensuring welding accuracy. At the same time, they provide suitable space for the subsequent installation of the heat shrink tubing 8 and the potting of adhesive, allowing the potting adhesive to more fully cover the welding joint, further strengthening the structural integrity and insulation protection of the welding area, and reducing electrical safety hazards caused by exposed welding joints.

[0083] It should be further explained that the slot 10 is an arc-shaped slot, and the solder joints of the pump line 6 and the welding line 5 are placed inside the slot 10. The inner wall of the slot 10 is polished smooth to avoid sharp edges scratching the insulation layer of the circuit.

[0084] Furthermore, the connection terminal group includes a first terminal 11, a second terminal 12 and a third terminal 13, and the first terminal 11, the second terminal 12 and the third terminal 13 are respectively welded to the welding line 5 one by one;

[0085] The first terminal 11 and the first accessory 14 form a ring structure, the second terminal 12 and the second accessory 15 form a ring structure, and the third terminal 13 is an independent ring structure;

[0086] The first accessory 14 has a first through groove 16 for the welding line 5 to pass through, and the second accessory 15 has a second through groove 17 for the welding line 5 to pass through.

[0087] In the above technical solution, the terminal group adopts a ring structure formed by the first terminal 11, the second terminal 12, and corresponding accessories, and the third terminal 13 is an independent ring structure. The first through slot 16 and the second through slot 17 opened in the first accessory 14 and the second accessory 15 provide a passage for the welding wire 5 to pass through, avoiding the welding wire 5 from getting tangled or squeezed with the terminal or insulating part 7, and ensuring the regularity of the circuit layout. The one-to-one welding of the three terminals with the three welding wires 5 realizes the independent partitioning of functions such as power transmission and signal feedback, avoids signal crosstalk between different lines, and meets the high-precision control requirements of the intervention pump.

[0088] It should be further noted that the connection terminal block includes three brass terminals.

[0089] The welding wires are provided in three places, which are connected to the first terminal 11, the second terminal 12, and the third terminal 13 respectively:

[0090] One of the welding wires is welded to the first terminal 11, and the second and third welding wires pass through the first through groove 16 of the first accessory 14. The first through groove 16 has two corners, and the second and third welding wires pass through the corners respectively.

[0091] The second welding wire is welded to the second terminal 12, and the third welding wire passes through the second through slot 17 of the second accessory 15 and is welded to the third terminal 13.

[0092] Furthermore, an injection port 18 is provided on the heat shrink tubing 8, and the glue is filled through the injection port 18 into the inner side of the heat shrink tubing 8, the inner side of each insulating component 7, the enclosing gap between the first terminal 11 and the first accessory 14, the enclosing gap between the second terminal 12 and the second accessory 15, and the inner periphery of the third terminal 13.

[0093] In the above technical solution, the injection port 18 on the heat shrink tubing 8 provides a convenient channel for adhesive filling, allowing the adhesive to be precisely filled into key areas such as the inner side of the heat shrink tubing 8, the inner side of the insulating component 7, the gap between the terminals and accessories, and the inner periphery of the third terminal 13. This achieves integrated fixation of all components, significantly improving the overall robustness of the connection structure and avoiding problems such as adhesive leakage and voids during the potting process. After the adhesive cures, it works synergistically with the heat shrink tubing 8 to form multiple insulating protective layers, further strengthening the insulation and isolation effect of each electrical component and preventing the infiltration of body fluids or short circuits. At the same time, the adhesive filling can fill the tiny gaps between components, preventing component loosening caused by vibration during interventional procedures. Combined with the low-temperature shrinkage treatment of the heat shrink tubing 8, it effectively avoids the formation of discontinuities on the surface of the connection structure, improving the smoothness of intravascular delivery during intervention and reducing frictional damage to the blood vessel wall.

[0094] It should be further noted that before applying the adhesive, the insulating component 7 and the connecting terminal should be bonded together with adhesive to avoid adhesive leakage during the potting process.

[0095] It should also be noted that the heat shrinking temperature of the heat shrink tubing should be lower than the glass transition temperature of the adhesive to prevent the adhesive from softening and flowing out.

[0096] like Figure 8-11 As shown, another objective of this invention is to provide a delivery handle for an interventional pump, enabling rapid docking with the connection structure of the interventional pump, simplifying the operator's operation process, reducing equipment redundancy, and achieving a sheathless interventional treatment mode in conjunction with the connection structure, thereby improving surgical safety and convenience, reducing the operator's operational burden and the patient's postoperative recovery risk.

[0097] To achieve the above objectives, the present invention adopts the following technical solution:

[0098] A delivery handle for an interventional pump, comprising:

[0099] The handle housing has a handle cavity 19 for housing the aforementioned connection structure;

[0100] The conversion circuit board 20 is fixed inside the handle housing;

[0101] The ejector pin assembly includes ejector pins 21 that correspond one-to-one with the connection terminals of the connection terminal assembly. The ejector pins 21 are connected to the conversion circuit board 20 via wires. Each ejector pin 21 is fixed on an ejector pin insulator 22. The ejector pin insulator 22 is fixed on a fixing plate 23. The handle housing has an ejector pin hole 24 through which the ejector pin insulator 22 passes. The ejector pin hole 24 is connected to the handle cavity 19.

[0102] A lifting structure is installed on the handle housing and is used to drive the fixed plate 23 to rise or fall along the height direction of the handle housing.

[0103] In the above technical solution, the lifting structure drives the fixing plate 23 to rise along the height direction of the handle shell, which in turn drives the ejector pin 21 to move upward. The connecting structure is inserted into the handle cavity 19. The lifting structure drives the fixing plate 23 to fall along the height direction of the handle shell, so that the ejector pin 21 of the ejector pin group and the connecting terminal of the connecting terminal group make contact one by one. The ejector pin 21 and the conversion circuit board 20 are connected by wires. With the insulation effect of the ejector pin insulator 22, a safe and stable electrical conduction path is constructed. The external power supply and control signal are processed and transmitted through the conversion circuit board 20 to meet the functional requirements of motor drive and parameter monitoring.

[0104] The lifting structure drives the fixed plate 23 to rise and fall, enabling the pin 21 to quickly contact or separate from the connecting terminal, making the docking operation between the connecting structure and the delivery handle more convenient. This replaces the rigid connection of the traditional integrated design, simplifies the operator's intervention process, and the detachable design allows the delivery handle to be reused, reducing medical costs.

[0105] It should be further explained that the handle shell is injection molded from medical-grade PC material, with an internal cylindrical handle cavity 19 for housing the connection structure. The conversion circuit board 20 is fixed to a slot inside the handle shell with screws. The conversion circuit board 20 is soldered with a medical power interface, a signal processing module, and a differential signal interface, which are connected to an external medical power adapter and monitor / controller via shielded power cables and twisted-pair shielded cables, respectively. The cables are combined into an integrated cable and led out through the cable outlet hole on the handle shell. A silicone sealing sleeve with an interference fit is embedded inside the cable outlet hole and tightened by a compression nut to ensure stable power and signal transmission and prevent the infiltration of body fluids and irrigation fluids.

[0106] The ejector pin assembly includes three gold-plated copper ejector pins 21, each corresponding to a connecting terminal. The ejector pins 21 are soldered to the corresponding pads of the conversion circuit board 20 via wires. Each ejector pin 21 is fixed in the ejector pin insulator 22 by interference fit. The ejector pin insulator 22 can be made of polysulfone. The ejector pin insulator 22 is fixed to the fixing plate 23 by screws or glued. The fixing plate 23 can be made of plastic.

[0107] The bottom of the handle housing has three ejector pin holes 24 that are adapted to the ejector pin insulator 22. The ejector pin holes 24 are connected to the handle cavity 19, and the ejector pin insulator 22 can pass through the ejector pin holes 24 to contact the connecting terminal. A medical-grade silicone sealing ring is embedded in the inner wall of the ejector pin hole 24. The inner diameter of the sealing ring is interference-fitted with the outer diameter of the ejector pin insulator 22 to ensure a seal while allowing the ejector pin 21 to move up and down. After the ejector pin insulator 22 passes through the sealing ring, it contacts the connecting terminal. The sealing ring prevents the flushing fluid from seeping into the handle from the ejector pin holes 24.

[0108] Each ejector pin 21 is fixed to the ejector pin insulating member 22, and there are at least two forms: First, the ejector pin insulating member 22 is set to correspond to each ejector pin 21, that is, three ejector pin insulating members 22 are set; Second, only one ejector pin insulating member 22 is set, and all ejector pins 21 are integrated and installed.

[0109] Furthermore, the handle housing includes:

[0110] The bottom shell 25 and the handle cavity 19 are opened on the bottom shell 25. A sealing element 26 is fixedly installed at one end of the bottom shell 25. The sealing element 26 has an opening 27 through the handle cavity 19. The bottom shell 25 has an installation cavity 28 for installing the lifting structure.

[0111] Side shell 29 is fixed to one side of bottom shell 25, and flushing liquid inlet 30 is provided through the opening 27 directly opposite the side shell 29.

[0112] The upper shell 31 is fixed above the lower shell 25 and together with the lower shell 25 form a receiving cavity 32. The conversion circuit board 20 and the ejector pin assembly are located in the receiving cavity 32. The lower shell 25 has a connecting hole 33 that communicates with the mounting cavity 28 and the receiving cavity 32 and allows the fixing plate 23 to pass through.

[0113] In the above technical solution, the handle housing adopts a combined structure of bottom shell 25, side shell 29 and top shell 31, which not only ensures the structural strength of the housing, but also facilitates the assembly and maintenance of internal components. The handle cavity 19 on the bottom shell 25 provides a stable placement space for the connecting structure, and the setting of the seal 26 effectively prevents leakage of liquid and flushing fluid between the bottom shell 25 and the side shell; the flushing fluid inlet 30 opened on the side shell 29 is precisely matched with the flushing channel 2 of the adapter 1, realizing the smooth introduction of flushing fluid and meeting the needs of pump head 40 bearing lubrication and anti-thrombosis; the connecting hole 33 opened on the bottom shell 25 provides a channel for the lifting and lowering movement of the fixing plate 23, so that the lifting structure can stably drive the movement of the ejector pin assembly, and the receiving cavity 32 provides an independent installation space for the conversion circuit board 20 and the ejector pin assembly, avoiding mutual interference between components and improving the regularity and operational stability of the internal structure of the handle.

[0114] It should be further explained that the bottom shell 25, side shell 29, and top shell 31 are all made of medical-grade PC material; the seal 26 is made of silicone rubber; the side shell 29 is bonded and fixed to one side of the bottom shell 25; a Luer connector-type flushing fluid inlet 30 is provided on the side shell 29 directly opposite the opening 27 of the seal 26 to facilitate connection of the flushing fluid pipeline; the top shell 31 is bonded and fixed above the bottom shell 25, forming a receiving cavity 32 with the bottom shell 25; the conversion circuit board 20 and the ejector pin assembly are both located in the receiving cavity 32; a rectangular connecting hole 33 is opened in the middle of the bottom shell 25 to connect the mounting cavity 28 and the receiving cavity 32; the fixing plate 23 passes through the connecting hole 33 and extends into the mounting cavity 28 to connect with the lifting structure.

[0115] Furthermore, the lifting structure includes:

[0116] The top block 34 is fixed to the upper end of the mounting cavity 28 and has a sliding hole;

[0117] The stepped shaft 35 is fixedly connected to the fixed plate 23, and its small diameter section is slidably fitted with the sliding hole.

[0118] Pull button 36 is located on the upper outer side of the handle and is fixed to the small diameter section of the stepped shaft 35;

[0119] Spring 37 is sleeved on the outside of the small diameter section of stepped shaft 35 and its two ends abut against the top block 34 and the step surface of stepped shaft 35, respectively.

[0120] In the above technical solution, the lifting structure adopts a combination design of top block 34, stepped shaft 35, pull button, and spring 37. By pulling and releasing the pull button, and with the elastic restoring force of the spring 37, the stepped shaft 35 drives the fixed plate 23 to rise and fall smoothly. The operation is convenient and labor-saving, reducing the operator's workload. The sliding fit design between the small diameter section of the stepped shaft 35 and the sliding hole of the top block 34 ensures the smoothness and accuracy of the lifting movement and avoids jamming. The two ends of the spring 37 abut against the stepped surfaces of the top block 34 and the stepped shaft 35, respectively, providing continuous elastic pressure for the contact between the ejector pin 21 and the connecting terminal, ensuring the reliability of electrical contact. At the same time, it can store elastic potential energy when the pull button is pulled, so that the ejector pin 21 can quickly and accurately connect with the connecting terminal after the pull button 36 is released, improving the efficiency of the surgical operation.

[0121] It should be further explained that the top block 34 is a medical PC component, which is bonded and fixed to the upper end of the mounting cavity 28; the stepped shaft 35 can be made of plastic or stainless steel, and its large-diameter section is fixedly connected to the fixing plate 23, which can be bonded, while the small-diameter section is slidably fitted with the sliding hole of the top block 34; the pull button 36 is a medical ABS component, located on the upper outer side of the handle, and is fixed to the top of the small-diameter section of the stepped shaft 35 by threads or glue; the spring 37 is a stainless steel compression spring, which is sleeved on the outer side of the small-diameter section of the stepped shaft 35. The upper end of the spring 37 abuts against the lower surface of the top block 34, and the lower end abuts against the stepped surface of the stepped shaft 35. In its natural state, the spring 37 is in a compressed state, providing a downward restoring elastic force.

[0122] It should also be noted that a medical-grade O-ring is embedded in the inner side of the sliding hole of the top block 34, and its inner diameter is interference-fitted with the small diameter section of the stepped shaft 35. The surface of the small diameter section of the stepped shaft 35 is coated with medical solid lubricant to ensure smooth sliding. At the same time, a flexible sealing gasket is set between the top block 34 and the stepped surface of the stepped shaft 35 to form a double seal in the radial and end face, preventing the flushing fluid from seeping into the installation cavity 28.

[0123] Furthermore, a locking rod 38 is fixed at the lower end of the stepped shaft 35, a clearance hole is opened in the bottom shell 25 for the locking rod 38 to pass through, and a locking port 39 is opened in the adapter sleeve 9 to engage with the locking rod 38.

[0124] In the above technical solution, the locking rod 38 at the lower end of the stepped shaft 35 engages with the locking port 39 of the adapter sleeve 9 to achieve mechanical locking between the connecting structure and the delivery handle. This effectively prevents displacement or detachment of the connecting structure due to vibration or changes in body position during interventional procedures or treatments, ensuring the stability of the electrical connection and the safety of equipment operation. The clearance hole in the bottom shell 25 provides a movement channel for the locking rod 38, preventing interference between the locking rod 38 and other components and ensuring smooth locking and unlocking operations. The engagement design of the locking rod 38 and the locking port 39 makes the installation and disassembly of the connecting structure more convenient, simplifying the surgical procedure. Furthermore, the locking structure can be fixed without additional tools, improving the convenience of the operator's operation and surgical efficiency.

[0125] It should be further explained that the stepped shaft 35 and the locking rod 38 can be integrally formed or manufactured separately and then connected by bonding, welding, or other methods. When the connecting structure is inserted into the handle cavity 19, the pull button 36 is released, and the locking rod 38 can pass through the clearance hole and engage with the locking port 39 to achieve mechanical locking between the connecting structure and the conveying handle.

[0126] It should also be noted that a medical-grade corrugated flexible sealing sleeve is fixedly embedded in the clearance hole of the bottom shell 25. The upper end of the sealing sleeve is bonded and fixed to the inner wall of the bottom shell 25, and the inner hole is press-fitted to the outer circumference of the locking rod 38. It can also extend and retract synchronously with the lifting and lowering of the locking rod 38 to form a dynamic seal, preventing body fluids and flushing fluids from seeping into the handle receiving cavity 32 from the clearance hole gap. The lower end of the locking rod 38 is a pointed tip, and the tip size is smaller than the locking port 39, so as to better achieve the locking function.

[0127] Furthermore, the central axis of the locking port 39 is collinear with the vertical projection central axis of the first terminal 11, the second terminal 12, and the third terminal 13.

[0128] In the above technical solution, the central axis of the locking port 39 is collinear with the vertical projection central axes of the three terminals. This ensures that when the locking rod 38 is inserted into the locking port 39, the ejector pin assembly can accurately align with the corresponding connection terminal, achieving synchronous and precise positioning of mechanical locking and electrical connection. This avoids poor contact or misalignment between the ejector pin 21 and the terminal due to locking deviation, thus improving the reliability of electrical conduction. This structure eliminates the need for additional alignment adjustments during operation; precise docking can be achieved simply by inserting the locking structure. This simplifies the operation process, reduces operational difficulty, and prevents component wear due to alignment deviation, extending the equipment's lifespan and ensuring the safety and stability of interventional treatment.

[0129] like Figure 12-14 As shown, another objective of the present invention is to provide an interventional pump that, through the precise adaptation and coordinated operation of the connection structure of the interventional pump and the delivery handle, enables an interventional mode without sheath placement, simplifying the operation process and reducing equipment redundancy.

[0130] To achieve the above objectives, the present invention adopts the following technical solution:

[0131] An interventional pump includes the aforementioned connecting structure, delivery handle, and pump head 40. The connecting structure is detachably placed inside the handle cavity 19 of the delivery handle, and the connecting terminal group is in corresponding contact with the ejector pin group. The pump head 40 is fixedly connected to the adapter 1 of the connecting structure through the conduit 3.

[0132] In the above technical solution, a complete interventional pump system is formed by combining the connecting structure, delivery handle, and pump head 40. The detachable design of the connecting structure and delivery handle replaces the traditional integrated structure of the pump body connected to the handle via catheter 3 and the tearable sheath intervention method, greatly simplifying the surgical procedure, reducing the redundancy of the delivery system, and improving the convenience of interventional operation. The corresponding contact and conduction between the connecting terminal group and the ejector pin group ensure stable transmission of motor drive and signal feedback, meeting the precise control requirements of the interventional pump. The pump head 40 is fixedly connected to the adapter 1 via catheter 3. With the flushing channel 2 of the adapter 1, the flushing system is simplified and operates smoothly, effectively reducing the risk of thrombosis in the bearing of the pump head 40. The entire system does not require indwelling sheath, avoiding problems such as wound infection, limb movement restriction, and impaired vascular repair caused by indwelling sheath. At the same time, it avoids the risks of wound enlargement and fragment residue caused by tearing of the tearable sheath, improving the safety of clinical treatment and the postoperative recovery effect of patients.

[0133] like Figure 15 and 16 As shown, both externally and internally powered interventional pumps are equipped with a flushing system. The interventional pump in this embodiment not only offers simple and efficient interventional operation, but its flushing system is also more streamlined due to its detachable connection structure and delivery handle design (distinct from the complex structure of other interventional pumps where the handle is fixedly connected to the proximal component). Specifically, the flushing fluid flows as follows: it enters through the Luer connector on the handle side shell 29, sequentially passes through the flushing channel 2 of the adapter 1, the flushing pipe 41 of the conduit 3, the gap 42 between the motor shaft and the rear bearing, the motor inner cavity 43, the gap 44 between the motor shaft and the front bearing, and finally flows out from the gap 45 between the bearing and the impeller. It should also be noted that the sealing element 26 prevents leakage of the flushing fluid. In the overall structure of the interventional pump, the flushing fluid flows unidirectionally, i.e., it enters through the Luer connector on the handle side shell 29 until it flows out from the gap 45 between the bearing and the impeller.

[0134] 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.

[0135] 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.

[0136] 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 connection structure for an interventional pump, characterized in that, include: The adapter (1) is a stepped rod with a flushing channel (2) running through it along its axis. The adapter (1) is fixedly connected to the interventional pump conduit (3). The flushing channel (2) is connected to the flushing pipeline of the conduit (3) to form the internal flushing flow path of the interventional pump system. The large diameter section of the adapter (1) has a circumferential slot (10) with the welding joint of the pump line (6) and the welding line (5) located in the slot (10). The slots (10) are evenly distributed along the circumference. The insulating tube (4) is a tubular structure and is fixedly sleeved on the small-diameter outer periphery of the adapter (1); The welding line group includes at least two welding lines (5), one end of each welding line (5) is welded to the pump line (6) of the intervention pump in a one-to-one correspondence; The connecting terminal group includes at least two connecting terminals, each of which is welded to the other end of the welding wire (5) and fixed to the outside of the insulating tube (4); The insulating element (7) is a plurality of fixed sleeves on the outside of the insulating tube (4) at intervals, and the insulating element (7) is located between two adjacent connecting terminals; Heat shrink tubing (8) is fixedly sleeved on the outer periphery of the large diameter section of the adapter (1), and the coverage area of ​​heat shrink tubing (8) includes the weld joint between the welding line (5) and the pump line (6). The adapter sleeve (9) is fixedly sleeved on the outside of the insulating tube (4), and one end of the adapter sleeve (9) abuts against the end of the connecting terminal group; The connection terminal group includes a first terminal (11), a second terminal (12) and a third terminal (13), and the first terminal (11), the second terminal (12) and the third terminal (13) are respectively welded to the welding line (5) one by one; The first terminal (11) and the first accessory (14) form a ring structure, the second terminal (12) and the second accessory (15) form a ring structure, and the third terminal (13) is an independent ring structure; The first component (14) has a first through slot (16) for the welding line (5) to pass through, and the second component (15) has a second through slot (17) for the welding line (5) to pass through. An injection port (18) is provided on the heat shrink tubing (8). Adhesive is filled through the injection port (18) into the inner side of the heat shrink tubing (8), the inner side of each insulating component (7), the enclosing gap between the first terminal (11) and the first accessory (14), the enclosing gap between the second terminal (12) and the second accessory (15), and the inner circumference of the third terminal (13). The connecting structure is detachably placed inside the handle cavity (19) of the delivery handle.

2. A delivery handle for an interventional pump, characterized in that, include: The handle housing has a handle cavity (19) for housing the connection structure described in claim 1. The conversion circuit board (20) is fixed inside the handle housing; The ejector pin assembly includes ejector pins (21) that correspond one-to-one with the connecting terminals of the connecting terminal assembly. The ejector pins (21) are connected to the conversion circuit board (20) via wires. Each ejector pin (21) is fixed on the ejector pin insulator (22), and the ejector pin insulator (22) is fixed on the fixing plate (23). The handle housing has an ejector pin hole (24) through which the ejector pin insulator (22) passes. The ejector pin hole (24) is connected to the handle cavity (19). A lifting structure is installed on the handle housing and is used to drive the fixed plate (23) to rise or fall along the height direction of the handle housing.

3. The delivery handle of the intervention pump according to claim 2, characterized in that, The handle housing includes: The bottom shell (25) and the handle cavity (19) are opened on the bottom shell (25). A sealing element (26) is fixedly installed at one end of the bottom shell (25). The sealing element (26) has an opening (27) through the handle cavity (19). The bottom shell (25) has an installation cavity (28) for installing the lifting structure. The side shell (29) is fixed to one side of the bottom shell (25), and the side shell (29) is provided with a flushing liquid inlet (30) through the opening (27). The upper shell (31) is fixed above the lower shell (25) and forms a receiving cavity (32) with the lower shell (25). The conversion circuit board (20) and the ejector pin assembly are located in the receiving cavity (32). The lower shell (25) has a connecting hole (33) that communicates with the mounting cavity (28) and the receiving cavity (32) and allows the fixing plate (23) to pass through.

4. The delivery handle of the intervention pump according to claim 3, characterized in that, The lifting structure includes: The top block (34) is fixed to the upper end of the mounting cavity (28) and has a sliding hole; The stepped shaft (35) is fixedly connected to the fixed plate (23), and its small diameter section is slidably fitted with the sliding hole; A pull button (36) is located above the outside of the handle and is fixed to the small diameter section of the stepped shaft (35); Spring (37) is sleeved on the outside of the small diameter section of the stepped shaft (35) and its two ends abut against the top block (34) and the stepped surface of the stepped shaft (35) respectively.

5. The delivery handle of the intervention pump according to claim 4, characterized in that, A locking rod (38) is fixed at the lower end of the stepped shaft (35), and a clearance hole is provided on the bottom shell (25) for the locking rod (38) to pass through.

6. An intervention pump, characterized in that, include: The connection structure as described in claim 1; The delivery handle according to any one of claims 2 to 5, wherein the connecting terminal group is in corresponding contact with the ejector pin group; The pump head (40) is fixedly connected to the adapter (1) of the connecting structure via the conduit (3).

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