Segmented reciprocating type conveying device suitable for peripherally woven stent

Abstract

The embodiment of the utility model provides a segmented reciprocating type conveying device suitable for a peripheral woven stent, and relates to the technical field of peripheral woven stent conveying. The sectional reciprocating type conveying device suitable for the peripheral woven stent comprises a conveying handle, two sections of fixing sleeves are arranged in the conveying handle, an inner pipe is installed in the fixing sleeves in a sliding mode, and one end of the inner pipe penetrates through an outer pipe arranged at one end of the conveying handle. The rotary knob on the conveying handle is rotated to 90 degrees, at the moment, the cam curved surface on the other side of the rotary knob can press the check block downwards, the push button can be pushed or withdrawn in a reciprocating mode to achieve sectional type release of the support, but at the moment, the check block is still provided with a structure for limiting the stroke of the push button, and the driving piece cannot be completely pushed out of the outer pipe. The woven stent can achieve the functions of segmented conveying and controllable release according to the requirements of doctors in clinic, the release position can be adjusted in a segmented mode in the release process, and release of the woven stent can tend to be in an ideal form.

Description

Technical Field

[0001] The utility model relates to the technical field of peripheral braided stent transportation, in particular to a segmented reciprocating transportation device suitable for peripheral braided stents. Background Art

[0002] Limb artery disease mainly includes vascular stenosis and blockage. The current main interventional treatment methods include balloon angioplasty and vascular stent implantation. How to maintain the maximum patency of the lumen for a longer period of time is the treatment direction of lower limb artery stenosis.

[0003] Currently, vascular stents used in lower limb artery stenosis include cutting stents and braided stents. Braided stents are often used for implantation across the knee and across joint lesions due to their excellent support and flexibility. For self-expanding braided stents, when compressed onto the delivery device, they undergo significant axial elongation, usually to more than twice their initial length. In the process of releasing the braided stent, the choice of stent diameter, whether the preoperative vascular preparation is sufficient, and the doctor's release speed will affect the final release shape of the stent, further affecting the therapeutic efficacy. The release process is heavily dependent on the doctor's operating experience. In clinical practice, phenomena such as stent release shortening, lengthening, and uneven mesh are often seen. Once the stent is released in the blood vessel, even if the release shape is not good, it cannot be released again or recovered outside the body. Additional treatment is required to achieve the ideal therapeutic effect.

[0004] In view of this, a segmented reciprocating delivery device suitable for peripheral braided stents is proposed, so that the braided stents can be delivered in segments and released in a controlled manner according to the needs of doctors in clinical practice. The release position can be adjusted in segments during the release process, so that the release of the braided stent can tend to the ideal form. Utility Model Content

[0005] The purpose of the utility model is to provide a segmented reciprocating delivery device suitable for peripheral braided stents, which can avoid heavy reliance on the doctor's operating experience during the release process, and avoid the common clinical phenomenon of stent release becoming shorter, longer, and grid unevenness.

[0006] The utility model provides a segmented reciprocating conveying device suitable for a peripheral braided stent, comprising a conveying handle, wherein two sections of fixed sleeves are arranged in the conveying handle, an inner tube is slidably installed in the fixed sleeve, one end of the inner tube passes through an outer tube arranged at one end of the conveying handle, and a limiting mechanism is installed at the inner tube between the two sections of the fixed sleeves, the limiting mechanism limits a push button connected to the inner tube, and the limiting mechanism is pushed by a knob installed on the outer side of the conveying handle.

[0007] Preferably, a slide groove is provided on the upper side of the conveying handle, the push button passes through the slide groove and extends to the outside, and the push button is slidably connected to the slide groove.

[0008] Preferably, a driving member is installed at one end of the inner tube.

[0009] Preferably, the driving member is provided with a fixing section and a driving groove, and both sides of the driving groove extend outwards.

[0010] Preferably, a mounting hole is provided on the side wall of the delivery handle, a knob is rotatably provided in the mounting hole, and a cam surface is provided on the inner side of the knob.

[0011] Preferably, teeth are provided on the frame of the mounting hole, and a protruding portion that engages with the teeth is provided on one side of the knob.

[0012] Preferably, the limiting mechanism includes a block, which is located on one side of the push button, and an insertion rod is provided on one side of the block, which is inserted into the insertion tube provided on the inner side of the delivery handle, and a sliding hole opened on the other side of the block is slidably connected to the inner tube.

[0013] Preferably, a spring is provided in the insertion rod, and one end of the spring is sleeved on the insertion rod.

[0014] Preferably, a push rod is provided on the side of the stopper close to the knob.

[0015] Preferably, when the knob is rotated, the cam surface of the knob pushes the push rod, so that the stopper moves away from the inner tube.

[0016] The present invention provides a segmented reciprocating conveying device for a peripheral braided stent. Compared with the prior art, the device has the following advantages:

[0017] The utility model works by rotating the knob on the delivery handle to ninety degrees. At this time, the cam surface on the other side of the knob will press down the block, so that the push button can be pushed back and forth or retracted to achieve segmented release of the stent. However, at this time, the block will still have a structure that limits the push button stroke, so that the drive member cannot be completely pushed out of the outer tube. When the knob on the delivery handle is rotated to one hundred and eighty degrees, the cam surface on the other side of the knob will continue to press down the block, and the block no longer limits the push button stroke. At this time, the drive member can be completely pushed out of the outer tube to achieve the purpose of completely releasing the stent, so that the braided stent can be delivered in segments and released in a controlled manner according to the doctor's needs in clinical practice. The release position can be adjusted in segments during the release process, so that the release of the braided stent can be close to the ideal form. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the disassembled structure of the delivery handle according to an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the disassembled structure of the knob and the delivery handle of an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the push button in the locked state of an embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the knob of the embodiment of the present utility model rotated 90 degrees;

[0024] Figure 6 This is a schematic diagram of the knob of the embodiment of the present utility model rotated 180 degrees;

[0025] Figure 7 This is a schematic diagram of the structure of the limiting mechanism of an embodiment of the utility model;

[0026] Figure 8 This is a schematic cross-sectional view of the inner tube and outer tube structures of an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the driving component structure of an embodiment of the present utility model.

[0028] Reference numerals:

[0029] 1. Conveying handle; 2. Mounting hole; 3. Teeth; 4. Knob; 5. Slide; 6. Push button; 7. Cam surface; 8. Insert tube; 9. Fixing sleeve; 10. Outer tube; 11. Inner tube; 12. Stopper; 13. Insert rod; 14. Spring; 15. Driving member; 16. Push rod. DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0031] Please refer to Figures 1-9 An embodiment of the utility model provides a segmented reciprocating conveying device suitable for a peripheral braided stent, including a conveying handle 1, two sections of fixed sleeves 9 are arranged in the conveying handle 1, an inner tube 11 is slidably installed in the fixed sleeve 9, and one end of the inner tube 11 passes through the outer tube 10 arranged at one end of the conveying handle 1.

[0032] A driving member 15 is installed at one end of the inner tube 11. The driving member 15 is provided with a fixing section and a driving groove. Both sides of the driving groove expand outward. The driving member 15 is used to push the bracket forward until the bracket reaches a predetermined position.

[0033] In order to realize the segmented transportation of the inner tube 11, a limiting mechanism is installed on the inner tube 11 between the two sections of the fixing sleeves 9. The limiting mechanism limits the push button 6 connected to the inner tube 11, and the limiting mechanism is pushed by the knob 4 installed on the outside of the transportation handle 1.

[0034] Specifically, a slide groove 5 is opened on the upper side of the conveying handle 1, and the push button 6 extends through the slide groove 5 to the outside, and the push button 6 is slidably connected to the slide groove 5, and the push button 6 is connected to the inner tube 11. The inner tube 11 is pushed out of the outer tube 10 by the push button 6.

[0035] Among them, the push button 6 is limited by a limiting mechanism, and the limiting mechanism includes a block 12, which is located on one side of the push button 6 to block the push button 6, and an insertion rod 13 is provided on one side of the block 12, and a spring 14 is sleeved on the insertion rod 13. One end of the spring 14 is located in the cannula 8 provided on the inner side of the delivery handle 1, and the insertion rod 13 is slidably connected to the cannula 8. Therefore, after the block 12 is pushed, it can be away from the inner tube 11. At this time, the push button 6 is no longer blocked and can be pushed. At the same time, the sliding hole opened on the other side of the block 12 is slidably connected to the inner tube 11, and the part where the sliding hole is opened on the block 12 is protruding, which can block the push button 6 for the second time.

[0036] Furthermore, a push rod 16 is provided on the side of the stopper 12 close to the knob 4, and a mounting hole 2 is opened on the side wall of the conveying handle 1. The knob 4 is rotatably provided in the mounting hole 2, and a cam surface 7 is provided on the inner side of the knob 4. When the knob 4 is rotated, the cam surface 7 of the knob 4 pushes the push rod 16 to move the stopper 12 away from the inner tube 11.

[0037] In addition, teeth 3 are provided on the frame of the mounting hole 2, and a protrusion that engages with the teeth 3 is provided on one side of the knob 4. Through the engagement of the teeth 3 with the protrusion, the knob 4 remains stable after rotation and will not rotate at will.

[0038] It is worth noting that if Figure 4 As shown, initially, the knob 4 on the delivery handle 1 is in the position shown in the figure, at which time the internal stopper 12 of the delivery handle 1 will hinder the advancement of the push button 6, so that the delivery system is in a self-locking protection state;

[0039] The conveying system pushes back and forth in sections (such as Figure 5As shown): The knob 4 on the delivery handle 1 is rotated to the position shown in the figure. At this time, the slightly convex portion of the cam surface 7 on the other side of the knob 4 will press down the stopper 12, so that the push button 6 can be pushed back and forth or retracted to achieve a segmented release of the stent. However, at this time, the convex portion of the sliding hole on the stopper 12 will still limit the travel of the push button 6, making it impossible for the driving member 15 to completely push out the outer tube 10.

[0040] Delivery system release status (such as Figure 6 As shown): Turn the knob 4 on the delivery handle 1 to the position shown in the figure. At this time, the more protruding portion of the cam surface 7 on the other side of the knob 4 will continue to press down the stopper 12, so that the sliding hole portion of the stopper 12 is away from the inner tube 11. The stopper 12 no longer limits the travel of the push button 6. At this time, the driving member 15 can be completely pushed out of the outer tube 10 to achieve the purpose of completely releasing the stent.

[0041] In summary, the embodiment of the present invention is a segmented reciprocating conveying device suitable for a peripheral braided stent, and its working principle is as follows: the knob 4 on the conveying handle 1 is rotated to the position shown in the figure. At this time, the slightly convex part of the cam surface 7 on the other side of the knob 4 will press down the block 12, so that the push button 6 can be pushed back and forth to achieve the segmented release of the stent. However, at this time, the convex part of the sliding hole on the block 12 will still limit the structure of the push button 6 stroke, so that the driving member 15 cannot be completely pushed out of the outer tube 10. The knob 4 on the conveying handle 1 is rotated to the position shown in the figure. At this time, the more convex part of the cam surface 7 on the other side of the knob 4 will continue to press down the block 12, so that the sliding hole part of the block 12 is away from the inner tube 11, and the block 12 no longer limits the stroke of the push button 6. At this time, the driving member 15 can be completely pushed out of the outer tube 10 to achieve the purpose of completely releasing the stent.

[0042] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A segmented reciprocating delivery device suitable for a peripheral braided stent, comprising a delivery handle (1), characterized in that: Two sections of fixed sleeves (9) are provided in the delivery handle (1), an inner tube (11) is slidably installed in the fixed sleeve (9), one end of the inner tube (11) passes through an outer tube (10) provided at one end of the delivery handle (1), a limiting mechanism is installed on the inner tube (11) between the two sections of the fixed sleeves (9), the limiting mechanism limits a push button (6) connected to the inner tube (11), and the limiting mechanism is pushed by a knob (4) installed on the outer side of the delivery handle (1).

2. The segmented reciprocating conveying device for a peripheral braided stent according to claim 1, characterized in that: A slide groove (5) is provided on the upper side of the conveying handle (1), and a push button (6) passes through the slide groove (5) and extends to the outside, and the push button (6) is slidably connected to the slide groove (5).

3. The segmented reciprocating conveying device for a peripheral braided stent according to claim 2, characterized in that: A driving member (15) is installed at one end of the inner tube (11).

4. The segmented reciprocating conveying device for a peripheral braided stent according to claim 3, characterized in that: The driving member (15) is provided with a fixing section and a driving groove, and both sides of the driving groove are expanded outwards.

5. The segmented reciprocating conveying device for a peripheral braided stent according to claim 4, characterized in that: A mounting hole (2) is provided on the side wall of the delivery handle (1), a knob (4) is rotatably provided in the mounting hole (2), and a cam curved surface (7) is provided on the inner side of the knob (4).

6. The segmented reciprocating conveying device for peripheral braided stents according to claim 5, characterized in that: Teeth (3) are provided on the frame of the mounting hole (2), and a protruding portion engaging with the teeth (3) is provided on one side of the knob (4).

7. The segmented reciprocating conveying device for a peripheral braided stent according to claim 6, characterized in that: The limiting mechanism comprises a stopper (12), the stopper (12) being located on one side of the push button (6), and an insertion rod (13) being provided on one side of the stopper (12), the insertion rod (13) being inserted into an insertion tube (8) provided on the inner side of the delivery handle (1), and a sliding hole provided on the other side of the stopper (12) being slidably connected to the inner tube (11).

8. The segmented reciprocating conveying device for peripheral braided stents according to claim 7, characterized in that: A spring (14) is provided in the insertion rod (13), and one end of the spring (14) is sleeved on the insertion rod (13).

9. The segmented reciprocating conveying device for peripheral braided stents according to claim 8, characterized in that: A push rod (16) is provided on one side of the stopper (12) close to the knob (4).

10. The segmented reciprocating conveying device for peripheral braided stents according to claim 9, characterized in that: When the knob (4) is rotated, the cam surface (7) of the knob (4) pushes the push rod (16), so that the stopper (12) moves away from the inner tube (11).

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