Interventional therapy delivery device

Abstract

The present application relates to the technical field of medical devices, and discloses an interventional therapy delivery device. The device comprises a tube body and an operating handle. The tube body is composed of an inner hypotube and an outer hypotube, which are fixed at the distal end and provided with a cutting groove. The operating handle comprises a shell, a catheter seat rotatably arranged at the proximal end of the shell, a push rod, a fine adjustment knob and a push button. The inner hypotube is fixedly connected to the catheter seat at the proximal end. A central hole is formed in the central axis direction of the push rod, and the outer hypotube is fixed in the central hole. A sliding groove is formed at the distal end of the push rod. The fine adjustment knob is provided with a knob central hole and a limiting rib at the proximal end, and cooperates with the sliding groove. The push button is coupled to the push rod. The outer hypotube is moved to adjust the bending angle by sliding the push button, and the push rod is adjusted in direction by rotating the fine adjustment knob. The present application effectively improves the torque transmission efficiency, reduces the bending radius, and simplifies the operation process.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an interventional treatment delivery device. Background Technology

[0002] Interventional delivery devices are widely used in endovascular interventional procedures, such as in the treatment of ischemic stroke, where drugs or devices are delivered to the lesion site via catheters. Due to the complex and tortuous structure of human blood vessels, especially the small and winding branches of cerebral vessels, the maneuverability of the catheter affects the success rate and efficiency of the procedure. Traditional interventional catheters typically employ a pre-shaped tip design, adjusting direction by pushing, retracting, and twisting the catheter during the procedure. However, the pre-shaped tip is prone to deformation after repeated manipulations, leading to decreased guidance and prolonged procedure time.

[0003] Existing adjustable-bend catheters achieve tip bending angle adjustment through mechanisms such as wire drawing. These devices allow for real-time intraoperative adjustment of the bending angle. However, such adjustable-bend catheters still have shortcomings: firstly, their torque transmission performance is poor, resulting in slow turning response in tortuous blood vessels; secondly, the bending radius is relatively large, limiting their applicability in small blood vessels. Furthermore, the handle operation of existing adjustable-bend catheters is complex, often requiring multiple steps to adjust the tube's bending angle and direction, increasing the difficulty of operation. Summary of the Invention

[0004] To address the above problems, this invention provides an interventional therapy delivery device, which aims to solve the problems of improving torque transmission efficiency, reducing the bending radius, and simplifying the operation process during the bending process of the interventional therapy delivery device.

[0005] Some technical solutions of the present invention provide an interventional treatment delivery device, including a tube body and an operating handle. The tube body includes an inner thiopancreatography (Thio) tube and an outer thiopancreatography (Thio) tube, which are fixed at their distal ends and have a cutting groove at the distal end. The operating handle includes a housing, a catheter seat rotatably disposed at the proximal end of the housing, a push rod disposed within the housing and capable of reciprocating in the proximal-to-distal direction, a fine-tuning knob, and a push button movably mounted in the housing and connected to the push rod. The proximal end of the inner thiopancreatography (Thio) tube is fixedly connected to the catheter seat; a push rod center hole is formed along the central axis of the push rod, and the outer thiopancreatography (Thio) tube is fixed in the center hole; a groove is formed at the distal end of the push rod, with the circumferential portion removed, and the groove extends in the distal-to-proximal direction; a knob center hole is formed at the proximal end of the fine-tuning knob along the central axis, and the distal end of the push rod is inserted into the knob center hole, the inner wall of which has a limiting rib that matches the insertion into the groove. With this structure, the sliding of the push button can drive the outer layer of the submersible tube to move, thereby adjusting the bending angle of the tube body through the far-end cutting groove. The fine-tuning knob can drive the push rod to rotate through the cooperation of the limiting rib and the sliding groove, thereby adjusting the bending direction, effectively improving the bending accuracy and torque transmission efficiency.

[0006] Optionally, the operating handle also includes a toothed assembly located at the distal end of the push rod. This assembly includes a toothed slider with a toothed portion at its distal end. The toothed slider is spring-loaded to reciprocate from proximal to distal. A toothed portion is located at the proximal end of the fine-tuning knob, and the toothed portion of the toothed slider engages with the toothed portion of the fine-tuning knob. This design provides real-time feedback on the tactile feedback, enhancing the accuracy of directional adjustment.

[0007] Optionally, the toothed assembly further includes a slider sleeve and a tail cap. The slider sleeve is fitted around the outer periphery of the toothed slider, and the tail cap is located at the proximal end of the slider sleeve. A toothed slider limiting groove is provided at the proximal end of the toothed slider, and a tail cap limiting groove is provided at the distal end of the tail cap. The toothed slider limiting groove and the tail cap limiting groove are coaxially opposite each other, and both ends of the spring are respectively inserted into the toothed slider limiting groove and the tail cap limiting groove. This structure ensures stable assembly and smooth movement of the toothed assembly.

[0008] Optionally, the distal outer edge of the tail cap is provided with an arc-shaped buckle and a tail cap limiting rib. The arc-shaped buckle extends in the circumferential direction, and the tail cap limiting rib extends in the direction from the proximal end to the distal end. The proximal end of the slider sleeve is provided with a sleeve groove and an arc-shaped groove. The arc-shaped buckle is engaged in the arc-shaped groove, and the tail cap limiting rib is matched and inserted into the sleeve groove. This further optimizes the connection reliability of the components.

[0009] Optionally, the operating handle also includes a push rod slider, which includes a central hole into which the push rod is rotatably inserted. The push rod slider facilitates the sliding and rotation of the push rod, reducing friction.

[0010] Optionally, the interventional therapy delivery device also includes a push button limiting block, which has a push arm and is connected to a push rod slider via the push arm. This achieves effective transmission between the push button and the push rod.

[0011] Optionally, the inner wall of the push button is provided with a limiting arm, and the end of the push button limiting block is provided with a push button limiting groove that cooperates with the limiting arm, with the limiting arm inserted into the push button limiting groove. This structure ensures the stability of the push button operation and the limiting function.

[0012] Optionally, the interventional therapy delivery device also includes a push button spring disposed between the push button and the push button limit block. The push button spring provides an automatic reset function for the push button, simplifying unlocking and locking operations.

[0013] Optionally, the outer layer of the subwoofer has a groove that is wider in the middle and narrower at both ends, while the inner layer has a groove of equal width. This groove design helps to achieve a smaller bending radius and smoother bending deformation.

[0014] Optionally, the cutting pitch of both the inner and outer layers of the thiocyanate tube increases sequentially from the distal to the proximal end. This achieves a gradual distribution of tube stiffness, improving passage and support in tortuous blood vessels. Attached Figure Description

[0015] Figure 1 A schematic diagram of the operating handle structure provided for some embodiments of the present invention.

[0016] Figure 2 This is a schematic diagram of the upper shell structure provided for some embodiments of the present invention.

[0017] Figure 3 This is a schematic diagram of the upper shell structure provided for some embodiments of the present invention.

[0018] Figure 4 This is a schematic diagram of the lower shell structure provided for some embodiments of the present invention.

[0019] Figure 5 This is a schematic diagram of a fine-tuning knob structure provided for some embodiments of the present invention.

[0020] Figure 6 This is a schematic diagram of a fine-tuning knob structure provided for some embodiments of the present invention.

[0021] Figure 7 This is a schematic diagram of the toothed component structure provided for some embodiments of the present invention.

[0022] Figure 8 This is a schematic diagram of the sliding of a toothed component provided for some embodiments of the present invention.

[0023] Figure 9This is a schematic diagram of a toothed slider structure provided for some embodiments of the present invention.

[0024] Figure 10 This is a schematic diagram of a slider sleeve structure provided for some embodiments of the present invention.

[0025] Figure 11 A schematic diagram of the tail cap structure provided for some embodiments of the present invention.

[0026] Figure 12 A schematic diagram of the push rod assembly structure provided for some embodiments of the present invention.

[0027] Figure 13 A schematic diagram of a push rod structure provided for some embodiments of the present invention.

[0028] Figure 14 This is a schematic diagram of a push rod and slider structure provided for some embodiments of the present invention.

[0029] Figure 15 This is a schematic diagram of a push rod and slider structure provided for some embodiments of the present invention.

[0030] Figure 16 This is a schematic diagram of the push button limiting block structure provided for some embodiments of the present invention.

[0031] Figure 17 This is a schematic diagram of the push button limiting block structure provided for some embodiments of the present invention.

[0032] Figure 18 A schematic diagram of a push button structure provided for some embodiments of the present invention.

[0033] Figure 19 A schematic diagram of a push button structure provided for some embodiments of the present invention.

[0034] Figure 20 This is a schematic diagram of the push button limiting block and push button assembly provided for some embodiments of the present invention.

[0035] Figure 21 This is a schematic diagram of the push button limiting block and push button assembly provided for some embodiments of the present invention.

[0036] Figure 22 This is a schematic diagram of the push button limiting block and push button assembly provided for some embodiments of the present invention.

[0037] Figure 23 This is a schematic diagram showing the assembled state of the operating handle according to some embodiments of the present invention.

[0038] Figure 24 A schematic diagram of the tube structure provided for some embodiments of the present invention.

[0039] Figure 25This is a schematic diagram of the intermediate layer welding structure provided for some embodiments of the present invention.

[0040] Figure 26 This is a schematic diagram showing the distribution of the inner layer submersible tube cutting grooves, provided for some embodiments of the present invention.

[0041] Figure 27 This is a schematic diagram showing the distribution of the cutting grooves in the outer layer of the submersible tube, provided for some embodiments of the present invention.

[0042] Figure 28 This is a schematic diagram of the cutting groove shape provided for some embodiments of the present invention.

[0043] Figure 29 This is a schematic diagram of the unfolded submersible tube after cutting, provided for some embodiments of the present invention.

[0044] Figure 30 A schematic diagram of the cutting groove in the bending area of ​​the outer layer of the submersible tube provided for some embodiments of the present invention.

[0045] Figure 31 A schematic diagram of the cutting groove in the bending area of ​​the inner layer of the submersible tube provided for some embodiments of the present invention.

[0046] Figure 32 This is a schematic diagram of the pipe hardness distribution provided for some embodiments of the present invention.

[0047] Figure 33 This is a schematic diagram of the outer layer coating provided for some embodiments of the present invention.

[0048] Figure 34 This is a schematic diagram of the tail end tube structure provided for some embodiments of the present invention.

[0049] Figure 35 A schematic diagram showing the setting of a developing ring is provided for some embodiments of the present invention.

[0050] Figure 36 This is a schematic diagram showing the arrangement of two developing rings for some embodiments of the present invention.

[0051] Figure 37 This is a schematic diagram of the overall structure of the interventional therapy delivery device provided in some embodiments of the present invention.

[0052] Figure 38 This is a schematic diagram illustrating the assembly process of the tube body and the operating handle for some embodiments of the present invention.

[0053] Figure 39 This is a schematic diagram of the proximal insertion of the catheter hub according to some embodiments of the present invention.

[0054] Figure 40 This is a schematic diagram of a catheter seat structure provided for some embodiments of the present invention.

[0055] Figure 41 This is a schematic diagram of a tube insertion push rod provided for some embodiments of the present invention.

[0056] Figure 42 A schematic diagram of an assembled interventional therapy delivery device provided for some embodiments of the present invention.

[0057] Figure 43 A schematic diagram illustrating the implementation process of the remote bending function provided in some embodiments of the present invention.

[0058] Figure 44 A schematic diagram illustrating the implementation process of the remote bending function provided in some embodiments of the present invention.

[0059] Figure 45 A schematic diagram illustrating the implementation process of the remote bending function provided in some embodiments of the present invention.

[0060] Figure 46 This is a schematic diagram of the pipe body after bending, provided for some embodiments of the present invention.

[0061] Figure 47 A schematic diagram of the direction adjustment process provided for some embodiments of the present invention.

[0062] Figure 48 A schematic diagram of the direction adjustment process provided for some embodiments of the present invention.

[0063] Figure 49 This is a schematic diagram illustrating the direction adjustment range for some embodiments of the present invention.

[0064] Reference numerals: 1-Operating handle, 11-Housing housing, 111-Upper housing, 1111-Push button groove, 1112-Scale marking, 1113-Positioning pin, 1114-Supporting rib, 1115-Limiting arc, 1116-Nut hole, 1117-Positioning groove, 1118-Upper housing limiting rib, 1119-Upper housing limiting tooth, 11110-Circular groove, 11111-Stop rib, 112-Lower housing, 1121-Positioning hole, 1122-Screw hole, 1123-Slide rail, 1124-Lower housing limiting rib, 1125-Stop groove. 12-Fine adjustment knob, 121-Fine adjustment knob toothed part, 122-Limiting groove, 123-Rotating grip, 124-Rotating grip anti-slip rib, 125-Fine adjustment knob limiting rib, 126-Conical transition hole, 13-Toothed assembly, 131-Toothed slider, 1311-Toothed slider toothed part, 1312-Toothed slider limiting rib, 1313-Toothed slider limiting groove, 132-Slider sleeve, 1321-Sleeve groove, 1322-Arc groove, 1323-Slider sleeve limiting rib, 133-Tail cap, 1331-Tail cap limiting Rib, 1332-Tail cap limiting groove, 1333-Arc buckle, 134-Toothed slider spring, 14-Push rod assembly, 141-Push rod, 1411-Push rod slide groove, 1412-Push rod injection hole, 1413-Sticking ring, 1414-Push rod limiting groove, 1415-Conical head, 142-Push rod slider, 1421-Push rod slider limiting rib, 1422-Cylindrical boss, 1423-Slide table, 1424-Limiting ring, 15-Push button limiting block, 151-Limiting tooth, 152-Push arm, 153-Push button limiting block limiting groove, 154- Arc-shaped groove, 155-cylindrical hole, 16-push button, 161-limiting arm, 162-arc buckle, 163-push button anti-slip rib, 17-guide tube seat, 171-guide tube seat injection hole, 172-slot, 18-push button spring, 2-tube body, 21-inner layer, 22-middle layer, 221-inner layer thiopanthen tube, 222-outer layer thiopanthen tube, 23-outer layer, 24-developing ring, 25-tail end tube, 26-cutting groove, D-cutting pitch, L-cutting length, A-length of outer layer covering outer layer thiopanthen tube, B-distance between developing ring and distal end face of tube body. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] <Control handle 1>

[0067] In some embodiments, the interventional therapy delivery device includes an operating handle 1.

[0068] Operating handle 1 is used to precisely adjust the bending angle and direction of the distal end of tube 2, such as... Figure 1 As shown, it mainly includes a housing 11, a fine-tuning knob 12, a toothed assembly 13, a push rod assembly 14, a push button limit block 15, and a push button 16.

[0069] The housing 11 consists of an upper shell 111 and a lower shell 112, providing structural support and component housing. The material can be engineering plastics (such as ABS or polycarbonate) to provide lightweight and durability. The upper shell 111 and the lower shell 112 are fixed together by screws, and have various positioning and limiting structures inside.

[0070] like Figure 2 and Figure 3 As shown, the upper shell 111 has a through push button groove 1111 on its upper part. The length of the push button groove 1111 can be designed according to the bending radius requirements. Its upper surface is engraved with scale markings 1112 to facilitate recording the position of the push button 16. A limiting tooth 1119 is provided below the push button groove 1111, which can cooperate with the push button limiting block 15 for limiting the push button 16. A positioning post 1113 and a support rib 1114 are provided at the far end. The positioning post 1113 is located on the support rib 1114. The support rib 1114 has a groove to support the fine adjustment knob 12. A limiting arc 1115 is also provided at the far end, which matches the limiting groove 122 of the fine adjustment knob 12 to achieve axial limiting. The fine adjustment knob 12 can rotate relative to the groove of the support rib 1114 and the limiting arc 1115. A positioning groove 1117 is also provided at the far end for fixing the toothed assembly 13. The upper shell 111 has a push-button groove 1111 inside with limiting ribs 1118 at both ends along the axial direction. The circular groove 11110 of the distal limiting rib 1118 is used to make way for the retaining ring 1413 of the push rod 141, while the circular groove 11110 of the proximal limiting rib 1118 supports the tube body 2. The proximal end of the upper shell 111 is also provided with a support rib 1114, which has a groove to support the front end of the guide tube seat 17. Nut holes 1116 are provided at the four corners of the distal and proximal ends of the upper shell 111 for inserting nuts; stop ribs 11111 are provided on both sides of the proximal end to prevent slippage during assembly of the upper and lower shells; grooves are provided at both the distal and proximal ends to cooperate with the fine-tuning knob 12 and the guide tube seat 17, respectively.

[0071] like Figure 4As shown, the lower shell 112 has a positioning hole 1121 at its distal end, located on the support rib 1114, which matches the positioning post 1113 of the upper shell 111. The groove on the support rib 1114 supports the fine-tuning knob 12. A limiting arc 1115 is provided at the distal end, which matches the limiting groove 122 of the fine-tuning knob 12 to achieve axial limiting. The fine-tuning knob 12 can rotate relative to the groove of the support rib 1114 and the limiting arc 1115. The limiting arc 1115 in the lower shell 112 matches the limiting arc 1115 in the upper shell 111 in terms of position and size. A positioning groove 1117 is also provided at the distal end of the lower shell 112, corresponding to the upper shell 111, to fix the toothed assembly 13. The middle slide rail 1123 guides the push rod assembly 14 to slide, and the limiting ribs 1124 at both ends limit the sliding distance. The circular groove 11110 on the limiting rib 1124 is used for clearance and support. The lower shell also has a support rib 1114 at its proximal end, with a groove on the support rib 1114 to support the guide tube seat 17. Screw holes 1122 are provided at the four corners of the lower shell 112 at both the distal and proximal ends for fixing. The side stop grooves 1125 mate with the stop rib 11111 of the upper shell 111 to prevent slippage during assembly of the upper and lower shells. The grooves at the distal and proximal ends are respectively used to mate with the fine-tuning knob 12 and the guide tube seat 17.

[0072] Fine-tuning knob 12 is used for direction adjustment, such as... Figure 5 and Figure 6 As shown, the device includes a fine-tuning knob toothed portion 121, a limiting groove 122, and a rotating grip portion 123. The rotating grip portion 123 has anti-slip ribs 124 on its surface to enhance the operating feel; it also has a limiting rib 125 inside, extending axially and slidingly engaging with the slide groove 1411 of the push rod 141 to drive the push rod 141 to rotate; the distal outlet has a tapered transition hole 126 inside to facilitate the insertion of the tube body 2. The fine-tuning knob 12 is axially limited by the limiting arcs 1115 of the upper shell 111 and the lower shell 112, allowing relative rotation. The toothed portion 121 meshes with the toothed assembly 13, providing operational feedback. It should be noted that the toothed portion 121 of the fine-tuning knob 12 can be an involute tooth or a circular arc tooth; other tooth designs can also achieve similar functions; the material can be metal or plastic to balance strength and weight.

[0073] The toothed assembly 13 provides tactile feedback when the fine-tuning knob 12 is turned and assists in directional locking. For example... Figure 7As shown, the toothed assembly 13 includes a toothed slider 131, a slider sleeve 132, a tail cap 133, and a toothed slider spring 134. The toothed slider 131 is inserted into the slider sleeve 132 via a limiting rib 1312, which matches a groove 1321 inside the slider sleeve 132. The tail cap 133 is inserted into the groove 1321 of the slider sleeve 132 via a limiting rib 1331, allowing the arc-shaped buckle 1333 to accurately engage with the arc-shaped groove 1322 of the slider sleeve 132. A spring 134 is installed in the limiting grooves of the toothed slider 131 and the tail cap 133. Under the action of the spring 134, the toothed slider 131 can slide along the groove 1321 of the slider sleeve 132. Figure 8 As shown.

[0074] like Figure 9 As shown, the toothed slider 131 includes a toothed portion 1311, a limiting rib 1312, and a limiting groove 1313. The limiting rib 1312 is inserted into the sliding groove 1321 of the slider sleeve 132, allowing sliding. The toothed portion 1311 engages with the toothed portion 121 of the fine-tuning knob. Figure 10 As shown, the slider sleeve 132 includes a sleeve groove 1321, an arc-shaped groove 1322, and a limiting rib 1323. The groove 1321 communicates with the tail end face, and the arc-shaped groove 1322 near the end of the slider sleeve 132 is fixedly connected to the tail cap 133. Figure 11 As shown, the tail cap 133 includes a limiting rib 1331, a limiting groove 1332, and an arc-shaped buckle 1333. The arc-shaped buckle 1333 is symmetrically arranged and engages with the arc-shaped groove 1322 of the slider sleeve 132; the limiting rib 1331 is symmetrically arranged and perpendicular to the arc-shaped buckle 1333. The toothed slider 131 and the limiting groove of the tail cap 133 are coaxially arranged, and the spring 134 is installed therein, allowing the toothed slider 131 to slide elastically. During assembly, the toothed slider 131 is inserted into the slider sleeve 132 through the limiting rib 1312, the tail cap 133 is fixed to the near end of the sleeve 132, and the spring provides preload force. It should be noted that the spring 134 can be replaced with other elastic elements such as rubber pads, and the material of the toothed slider 131 can be copper alloy or engineering plastic.

[0075] The push rod assembly 14 can drive the push rod 141 to slide in the proximal-distal direction, and does not restrict the circumferential rotation of the push rod 141, such as... Figure 12 As shown, it includes a push rod 141 and a push rod slider 142. (As...) Figure 13As shown, the push rod 141 is a hollow tubular shape, including a groove 1411, an injection hole 1412, a retaining ring 1413, a limiting groove 1414, and a conical head 1415. The push rod 141 is divided by the retaining ring 1413, with the diameter of the rod portion on the left side of the retaining ring 1413 being smaller than the diameter of the rod portion on the right side. A groove 1411 is provided on the rod portion on the left side of the retaining ring 1413, with one end of the groove 1411 communicating with the end face of the left rod portion. The injection hole 1412 penetrates the sidewall and is located between the groove 1411 and the retaining ring 1413; the conical head 1415 is located near the right end of the rod portion on the right side of the retaining ring 1413, and the diameter of the conical head 1415 is slightly smaller than the diameter of the right rod portion; the limiting groove 1414 is located to the left of the conical head 1415.

[0076] like Figure 14 and Figure 15 As shown, the push rod slider 142 includes a limiting rib 1421, a cylindrical boss 1422, a slide 1423, and an internal limiting ring 1424. The slide 1423 is located at the bottom of the push rod slider 142, contacts the slide rail 1123 of the lower shell 112, and can move along the slide rail 1123. The limiting ring 1424 is located inside the push rod slider 142 and is a conical annular hole that mates with the conical head 1415 of the push rod 141. The cylindrical boss 1422 is located at the upper center of the push rod slider 142 and is used to house the spring 18. Limiting ribs 1421 are also provided on the outer surface of the push rod slider 142, located on both sides of the cylindrical boss 1422. The push rod 141 is inserted into the push rod slider 142 through the conical head 1415. The limiting ring 1424 is engaged with the limiting groove 1414, restricting the axial displacement of the push rod 141 relative to the push rod slider 142, but allowing the push rod 141 to rotate freely within the inner hole of the push rod slider 142. When the push rod 141 slides, it drives the outer layer of the submersible tube 222 to move; when rotating, it transmits torque through the fine-tuning knob limiting rib 125 cooperating with the slide groove 1411. Stainless steel can be selected as the material to ensure strength.

[0077] The push button limit block 15 is used for locking and unlocking the push button 16, such as... Figure 16 and Figure 17As shown, the device includes a limiting tooth 151, a push arm 152, a limiting groove 153, an arc-shaped groove 154, and a stepped cylindrical hole 155. The limiting tooth 151 is located on the upper part of the push button limiting block 15, with at least one tooth on each side. The limiting teeth 151 on both sides are symmetrically distributed and mesh with the limiting teeth 1119 of the upper shell 111. The shape of the limiting tooth 151 can be triangular, trapezoidal, or arc-shaped. The push arm 152 is located on the lower part of the push button limiting block 15 and is engaged on both sides of the limiting rib 1421 of the push rod slider 142. The push button limiting block 15 can drive the push rod slider 142 to perform axial reciprocating motion. The limiting groove 153 is located on both sides of the push button limiting block 15 and is used to install the push button 16. The arc-shaped groove 154 inside the round hole at the top of the push button limiting block 15 engages with the arc-shaped buckle 162 of the push button 16. The stepped cylindrical hole 155 holds the push button spring 18. The push button limiting block 15 is pushed upward by the spring 18, so that the limiting tooth 151 engages and fixes the position of the push button 16.

[0078] like Figure 18 and Figure 19 As shown, the push button 16 includes a limiting arm 161, an arc-shaped buckle 162, and an anti-slip rib 163. The arc-shaped buckle 162 is located at the center of the lower surface of the push button 16 and engages with the arc-shaped groove 154 of the push button limiting block 15. The limiting arms 161 are symmetrically arranged on both sides of the arc-shaped buckle 162 and are inserted into the limiting grooves 153 of the push button limiting block 15. The anti-slip rib 163 on the upper surface of the push button 16 is raised for easy pressing. The push button 16 is connected to the push button limiting block 15 through the limiting arm 161 and the arc-shaped buckle 162. It unlocks when pressed down and drives the push rod slider 142 when pushed.

[0079] like Figures 20-22 As shown, the push button limiting block 15 is inserted into the push button groove 1111 of the upper shell 111, and the limiting arm 161 of the push button 16 is inserted into the limiting groove 153 of the push button limiting block 15, and pressed down so that the arc-shaped buckle 162 is engaged with the arc-shaped groove 154. The push rod slider 142 is placed on the slide rail 1123 of the lower shell 112, and the push arm 152 of the push button limiting block 15 contacts the limiting rib 1421 of the push rod slider 142. After assembly, as shown... Figure 23 As shown, the limiting tooth 151 of the push button limiting block 15 meshes with the limiting tooth 1119 of the upper shell 111, restricting the movement of the push button 16.

[0080] <Tube body 2>

[0081] In some embodiments, the interventional therapy delivery device includes a tube body 2.

[0082] like Figure 24 As shown, the tube body 2 includes an inner layer 21, a middle layer 22 and an outer layer 23 from the inside to the outside. A developing ring 24 is provided at the far end and a tail tube 25 is provided at the near end.

[0083] The inner layer 21 is formed by fusing at least two different polymer tubes together using a heat-sealing process to create a polymer composite tube. The inner layer of the composite tube uses a self-lubricating PTFE tube as a liner. The outer layer of the composite tube can be either TPU or Pebax, or a combination of both. The TPU material has a hardness of 60 A to 84 A, and the Pebax material has a hardness of 25 D to 40 D. The outer layer of the composite tube can use the same material and hardness; it can also use the same material with different hardnesses in multiple segments (at least two segments); or it can use different materials with different hardnesses in multiple segments (at least two segments). When using different materials or different hardnesses in multiple segments, the hardness of the composite tube should increase sequentially from one end to the other to ensure a smooth hardness transition in the inner layer 21 tube body 2, and the softest end of the composite tube should correspond one-to-one with the farthest end of the hyaluronic acid tube.

[0084] The intermediate layer 22 is composed of two coaxially arranged sodium hypochlorite tubes, with their distal end faces flush. The inner sodium hypochlorite tube 221 is longer than the outer sodium hypochlorite tube 222. At least one developing ring 24 is located at the distal end of each sodium hypochlorite tube. The distalest developing ring 24 is situated between the inner and outer sodium hypochlorite tubes 221 and is flush with the distal end faces of both tubes. At the distal end, the developing ring 24 is laser-welded to the inner sodium hypochlorite tube 221 and to the outer sodium hypochlorite tube 222, forming a single unit that constitutes the intermediate layer 22. Figure 25 As shown. At the proximal end, the inner submersible tube 221 and the outer submersible tube 222 can slide relative to each other.

[0085] The inner and outer sodium hypochlorite tubes 221 and 222 can be made of 304 stainless steel, 316 stainless steel, 304L stainless steel, nickel-titanium alloy, or cobalt-chromium alloy. The inner and outer sodium hypochlorite tubes can be made of the same material to form the intermediate layer 22, or they can be made of different materials combined in pairs to form the intermediate layer 22. The outer diameter of the outer sodium hypochlorite tube 222 ranges from 0.88 mm to 1.30 mm, the wall thickness from 0.04 mm to 0.08 mm, and the length from 1430 mm to 1680 mm. The outer diameter of the inner sodium hypochlorite tube 221 ranges from 0.72 mm to 1.14 mm, the wall thickness from 0.04 mm to 0.08 mm, and the length from 1445 mm to 1695 mm.

[0086] At least five sets of laser-cut regions with different pitches are made along the central axis on the inner layer of the sodium hypochlorite tube 221. The segment length (i.e., cutting length L) of each set of cutting regions is different, and the pitch (i.e., cutting pitch D) of each set of inner cutting grooves increases sequentially from the far end to the near end of the inner layer of the sodium hypochlorite tube 221 to achieve the purpose of gradual hardness change of the tube body 2. Figure 26 As shown, the cutting groove pitch and segment lengths from the distal end to the proximal end of the inner layer of the submersible tube 221 are as follows: the first segment cutting length L1 is 8 mm to 15 mm, and the pitch D1 is 0.08 mm to 0.12 mm; the second segment cutting length L2 is 70 mm to 95 mm, and the pitch D2 is 0.11 mm to 0.15 mm; the third segment cutting length L3 is 55 mm to 85 mm, and the pitch D3 is 0.13 mm to 0.20 mm; the fourth segment cutting length L4 is 65 mm to 95 mm, and the pitch D4 is 0.15 mm to 0.25 mm; the fifth segment cutting length L5 is 75 mm to 90 mm, and the pitch D5 is 0.24 mm to 0.43 mm.

[0087] At least five sets of laser-cut regions with different pitches are made along the central axis on the outer layer of the sodium hypochlorite tube 222. The segment lengths of each set of cut regions are evenly distributed, and the pitch of each set of cut grooves increases sequentially from the far end to the near end of the outer layer of the sodium hypochlorite tube 222 to achieve a gradual change in the hardness of the tube body 2. Figure 27 As shown, the cutting groove pitch and segment lengths from the distal end to the proximal end of the outer layer of the submersible tube 222 are as follows: the first segment cutting length L1 is 35 mm to 50 mm, and the pitch D6 is 0.08 mm to 0.12 mm; the second segment cutting length L2 is 55 mm to 75 mm, and the pitch D7 is 0.14 mm to 0.18 mm; the third segment cutting length L3 is 70 mm to 95 mm, and the pitch D8 is 0.16 mm to 0.23 mm; the fourth segment cutting length L4 is 80 mm to 110 mm, and the pitch D9 is 0.19 mm to 0.30 mm; the fifth segment cutting length L5 is 45 mm to 65 mm, and the pitch D10 is 0.31 mm to 0.50 mm.

[0088] After the gradual change in hardness between the inner and outer layers of the sodium hypochlorite tube is laser-cut, the shape of the cut groove is as follows: Figure 28 As shown; after unfolding the cut submersible tube into a flat state, the slit pitch of each cut segment can be observed, such as... Figure 29 As shown.

[0089] At the farthest ends of both the inner and outer layers of the submersible tube, laser-cut bending sections are present, with cutting lengths ranging from 5 mm to 20 mm. The cutting groove 26 in the bending area of ​​the outer submersible tube 222 has a structure that is wider in the middle and narrower at both ends, similar to an elongated ellipse. This groove design eliminates stress concentration, allowing the ridges on both sides of the outer submersible tube 222 to withstand greater tensile or compressive deformation during bending without breaking or buckling. This allows the tube body 2 to reach a more extreme bending radius while maintaining the roundness of the tube cavity and preventing flattening. The pitch of the cutting groove 26 is 0.18 mm to 0.35 mm, the width of the middle section of the cutting groove 26 is 0.1 mm to 0.25 mm, and the width at both ends is 0.04 mm to 0.17 mm. Figure 30 As shown. The cutting groove 26 in the bending area of ​​the inner layer of the submersible 221 has a uniform width structure, with a cutting pitch of 0.18 mm to 0.35 mm and a width of 0.08 mm to 0.15 mm. Figure 31 As shown.

[0090] After the two sodium hypochlorite tubes are assembled, based on the different cutting lengths and cutting pitches of each segment of the inner and outer sodium hypochlorite tubes, tube body 2 is ultimately constructed into various hardness sections, such as... Figure 32 As shown.

[0091] The outer layer 23 can be made of either TPU or Pebax, or a combination of both. The TPU material can have a hardness of 60 A to 85 A, and the Pebax material can have a hardness of 25 D to 40 D. The outer layer 23 can be made of the same material and with the same hardness; it can also be made of the same material with different hardnesses in multiple segments (at least two segments); or it can be made of different materials with different hardnesses in multiple segments (at least two segments). When using different materials or hardnesses in multiple segments, the hardness distribution of the outer layer 23 from the distal end to the proximal end of the tube body 2 should follow a progressively increasing principle. The outer layer 23 is heat-sealed onto the outer layer of the intermediate layer 22, with a covering length A of 80 cm to 120 cm. A coating is applied to the covered outer layer 23, such as... Figure 33 As shown.

[0092] A tail end tube 25 is provided at the tail end of the inner layer 221 near the proximal end of the tube body 2. Half of the tail end tube 25 is located at the proximal tail end of the inner layer 221, and the other half is located at the proximal tail end of the inner layer 21. Figure 34 As shown, the proximal tail portion of the inner layer 221 and the proximal tail portion of the inner layer 21 are fixed together by a heat-sealing process. The material of the tail tube 25 can be TPU, Pebax, or nylon, where the hardness of TPU can be selected from 70 A to 98 A, the hardness of Pebax can be selected from 55 D to 72 D, and the hardness of nylon can be selected from 85 A to 75 D.

[0093] Since the outer layer 23 is in contact with human tissue, a coating is applied at a length of 60 cm to 115 cm from the distal end of the tube body 2. This coating may be selected from hydrophilic PVP coating material or PAM coating material, heparin coating material or phosphocholine coating material with anticoagulant function, or disposable antibacterial colony deposition coating material with antibacterial function.

[0094] At least one developing ring 24 is provided at the distal end of the tube body 2. When there is only one developing ring 24, the developing ring 24 is located between the inner layer thiopancreatic tube 221 and the outer layer thiopancreatic tube 222, and is flush with the distal end face of the two thiopancreatic tubes. The distance B between the developing ring 24 and the distal end face of the tube body 2 is 0.5 mm to 1.5 mm. Figure 35 As shown. When two developing rings 24 are provided, one developing ring 24 is configured as described above, and the other developing ring 24 is located on the outer sodium hypotube 222, with the distance between the two developing rings 24 being 20mm~40mm, as shown. Figure 36 As shown. The developing ring 24 can be made of platinum-iridium alloy, tantalum or tungsten, and the developing ring 24 can have an open or circular structure.

[0095] Figure 37 The structure of the assembled interventional therapy delivery device is shown. The assembly process of the interventional therapy delivery device is described below. Figure 38 As shown, the assembly of the tube body 2 and the operating handle 1 begins from the proximal end of the tube body 2: First, insert the proximal tail of the catheter into the assembly point of the catheter seat 17, so that the proximal end of the inner layer of the thiocyanate tube 221 abuts against the step of the catheter seat 17, as shown. Figure 39 As shown. Then, UV adhesive or fast-drying adhesive is injected through the adhesive injection hole 171 of the conduit seat. After curing, the inner layer of the hyaluronic acid tube 221 is bonded and fixed to the conduit seat 17. (See figure) Figure 40 As shown, the catheter seat 17 includes an injection hole 171 and a retaining groove 172. The retaining groove 172 is used to limit the catheter seat 17 to the proximal end of the housing 11, ensuring that the tube body 2 and the catheter seat 17 rotate synchronously when the fine-tuning knob 12 is rotated. Next, the tube body 2 is inserted into the center hole of the push rod 141 of the push rod assembly 14, so that the proximal end face of the outer sodium hypochlorite tube 222 is flush with the end face of the push rod 141, as shown. Figure 41As shown. UV glue or fast-drying glue is injected into the glue injection hole 1412 of the push rod 141. After curing, the outer layer of the sodium hypo tube 222 is bonded and fixed to the push rod 141. The sliding groove 1411 of the push rod 141 engages with the limiting rib 125 of the fine-tuning knob 12, allowing the push rod 141 to rotate. Then, the bonded tube 2 is passed sequentially through the toothed assembly 13 and the center hole of the fine-tuning knob 12. The limiting groove 122 of the fine-tuning knob 12 is engaged on the limiting arc 1115 at the far end of the housing 11, achieving axial limiting. The toothed assembly 13 is engaged in the positioning groove 1117 of the housing 11, ensuring that the toothed slider 131 meshes with the toothed part 121 of the fine-tuning knob. The guide seat 17 is engaged at the near end of the housing 11, and the housing 11 is fixed by screws. After assembly, as shown... Figure 42 As shown. It should be noted that the adhesive can also be replaced with other types such as epoxy resin.

[0096] In this embodiment, the distal bending and bending angle direction adjustment of the interventional treatment delivery device are accomplished by operating the push button 16 and the fine-tuning knob 12.

[0097] The process of implementing the remote bending function is as follows: Figures 43-45 As shown. Pressing down on push button 16 compresses push button spring 18 via limit arm 161, causing push button limit block 15 to move down. Limit tooth 151 disengages from upper shell limit tooth 1119, unlocking push button 16. Continuing to press and hold push button 16 and pushing it forward, push button 16 drives push button limit block 15 via arc buckle 162. Push arm 152 of push button limit block 15 pushes push rod slider 142 forward along slide rail 1123 of lower shell 112. Push rod slider 142 engages with limit groove 1414 of push rod 141 via limit ring 1424, driving push rod 141 forward. Push rod 141 is fixed to outer submersible tube 222, thereby driving outer submersible tube 222 forward. Because the outer layer of the sodium hypochlorite tube 222 and the inner layer of the sodium hypochlorite tube 221 are welded and fixed at the distal end, the outer layer of the sodium hypochlorite tube 222 presses forward to compress the distal cutting groove 26. The deformation of the cutting groove 26 causes the inner layer of the sodium hypochlorite tube 221 to bend, thus achieving the distal bending of the tube body 2. The maximum bending angle can reach 180°. Figure 44 As shown. After bending, release the push button 16, the push button spring 18 pushes up the push button limit block 15, the limit tooth 151 engages with the limit tooth 1119 of the upper shell 111, locking the push button 16 in position and maintaining the bent state.

[0098] The bending angle direction can be adjusted in two ways. One way is to rotate the fine-tuning knob 12, such as... Figure 49As shown. When the direction after bending does not match the target, turn the fine-tuning knob 12 clockwise or counterclockwise. The fine-tuning knob 12 engages with the slide groove 1411 of the push rod 141 through the limiting rib 125, driving the push rod 141 to rotate. The push rod 141 is fixed to the outer layer of the sodium hypochlorite tube 222, thereby driving the outer layer of the sodium hypochlorite tube 222 to rotate. The outer layer of the sodium hypochlorite tube 222 is welded to the distal end of the inner layer of the sodium hypochlorite tube 221, thereby driving the inner layer of the sodium hypochlorite tube 221 to rotate. The proximal end of the inner layer of the sodium hypochlorite tube 221 is fixed to the guide tube seat 17, realizing the overall rotation of the tube body 2, adjusting the bending direction within a range of ±360°, such as... Figure 49 As shown. During rotation, the toothed portion 121 of the fine-tuning knob 12 engages with the toothed portion 1311 of the toothed slider 131, providing tactile feedback.

[0099] Another method involves rotating the entire operating handle 1. When the operating handle 1 is rotated directly, the toothed assembly 13 is fixed by the positioning groove 1117 of the housing 11, and the toothed slider 131 engages with the fine-tuning knob 12, causing the fine-tuning knob 12 to rotate. The fine-tuning knob 12 drives the push rod 141 to rotate through the limiting rib 125, and the push rod slider 142 follows under the action of the push button limiting block 15, causing the push rod assembly 14 to rotate as a whole, ultimately adjusting the direction of the tube 2. It should be noted that the direction adjustment can combine the two methods: the fine-tuning knob 12 is used for fine adjustment, and the overall rotation is used for rapid adjustment.

[0100] This embodiment achieves high performance of the interventional therapy delivery device by integrating the operating handle 1 and the tube body 2: the operating handle 1 provides intuitive control via push button 16 and fine-tuning knob 12; the sliding and rotating separation of the push rod 141 ensures accurate bending and efficient torque transmission; the toothed assembly 13 provides tactile feedback and improves controllability. The tube body 2 employs a double-layered hypotube with a gradually varying hardness structure, enabling small-radius bending and excellent passage; the surface coating reduces tissue damage. During interventional surgery, the bending angle and direction of the catheter can be quickly adjusted to handle tortuous blood vessels, improving the success rate and efficiency of the procedure.

[0101] The above are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An interventional therapy delivery device, characterized in that, include: The tube body includes an inner layer of sodium thiosulfate tube and an outer layer of sodium thiosulfate tube, wherein the inner layer of sodium thiosulfate tube and the outer layer of sodium thiosulfate tube are fixed at a distal end, and a cutting groove is provided at the distal end; Operating handle, including: case; The conduit seat is rotatably disposed at the proximal end of the housing, and the proximal end of the inner layer of the submersible tube is fixedly connected to the conduit seat; A push rod is disposed inside the housing and can slide back and forth in the direction from the proximal end to the distal end. A push rod center hole is provided in the direction of the central axis of the push rod, and the outer layer of sodium hypochlorite tube is fixed in the center hole. The distal end of the push rod is formed with a groove in the form of removing the circumferential direction portion, and the groove extends in the direction from the distal end to the proximal end. A fine-tuning knob has a central hole at its proximal end along the central axis. The distal end of a push rod is inserted into the central hole. The inner wall of the central hole has a limiting rib that matches the sliding groove. When the push rod slides, it drives the outer layer of the submersible tube to move. When the push rod rotates, it transmits torque through the limiting rib and the sliding groove. The push button is movably mounted on the housing and connected to the push rod.

2. The interventional therapy delivery device as described in claim 1, characterized in that, The operating handle also includes: A toothed assembly, disposed on the distal end of the push rod, includes a toothed slider, the distal end of which is provided with a toothed portion, and the toothed slider is mounted by means of a spring in a manner that allows it to reciprocate along the proximal to distal direction; The near end of the fine-tuning knob is provided with a toothed portion, and the toothed portion of the toothed slider engages with the toothed portion of the fine-tuning knob.

3. The interventional therapy delivery device as described in claim 2, characterized in that, The toothed assembly further includes: A slider sleeve is fitted around the outer periphery of the toothed slider; The tail cap is located near the end of the slider sleeve; The toothed slider has a toothed slider limiting groove at its near end and a tail cover limiting groove at its far end. The toothed slider limiting groove and the tail cover limiting groove are coaxially opposite to each other. The two ends of the spring are respectively inserted into the toothed slider limiting groove and the tail cover limiting groove.

4. The interventional therapy delivery device as described in claim 3, characterized in that, The outer edge of the distal end of the tail cap is provided with an arc buckle and a tail cap limiting rib. The arc buckle extends in the circumferential direction, and the tail cap limiting rib extends in the direction from the proximal end to the distal end. The proximal end of the slider sleeve is provided with a sleeve sliding groove and an arc-shaped groove. The arc buckle is engaged in the arc-shaped groove, and the tail cap limiting rib is matched and inserted into the sleeve sliding groove.

5. The interventional therapy delivery device as described in claim 1, characterized in that, The operating handle also includes a push rod slider, the push rod slider having a central hole, and the push rod being rotatably inserted into the central hole.

6. The interventional therapy delivery device as described in claim 5, characterized in that, It also includes a push button limiting block, which has a push arm and is connected to the push rod slider via the push arm.

7. The interventional therapy delivery device as described in claim 6, characterized in that, The inner wall of the push button is provided with a limiting arm, and the end of the push button limiting block is provided with a push button limiting groove that cooperates with the limiting arm. The limiting arm is inserted into the push button limiting groove.

8. The interventional therapy delivery device as described in claim 7, characterized in that, It also includes a push button spring, which is disposed between the push button and the push button limiting block.

9. The interventional therapy delivery device as described in claim 1, characterized in that, The outer layer of the sodium hypochlorite tube has a cutting groove that is wide in the middle and narrow at both ends, while the inner layer of the sodium hypochlorite tube has a cutting groove of equal width.

10. The interventional therapy delivery device as described in claim 1, characterized in that, The cutting pitch of both the inner and outer sub-thallium tubes increases sequentially from the distal end to the proximal end.

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