CN216603200U - Support conveying system capable of being accurately positioned - Google Patents
Support conveying system capable of being accurately positioned Download PDFInfo
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- CN216603200U CN216603200U CN202122865277.9U CN202122865277U CN216603200U CN 216603200 U CN216603200 U CN 216603200U CN 202122865277 U CN202122865277 U CN 202122865277U CN 216603200 U CN216603200 U CN 216603200U
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- sheath tube
- tube
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Abstract
The utility model discloses a stent conveying system capable of accurately positioning, which comprises a movable sheath, a fixed sheath and a stent, wherein the fixed sheath is used for fixing the stent, the movable sheath comprises a handle, a stent length buckle, an inner sheath, a sheath inclined part, an outer sheath and an outer sheath positioning mark part, and the sheath inclined part and the outer sheath are integrally formed and are arranged at the front end of the inner sheath; the utility model provides a system and a method for accurately positioning stent delivery with proximal end first release. The system has simple structure and convenient use. The conveying system can realize the near-end accurate positioning of the stent, and can avoid the overlong or too short stent caused by inaccurate release of the near-end of the stent through the near-end accurate positioning, avoid the situation that the too short stent can not completely cover the stenotic occlusive lesion, and the overlong stent can influence the bifurcated blood vessel and the operation effect. The sheath is carried, and the setting of radiography side opening more can let the support realize more accurate location, is worth further promoting.
Description
Technical Field
The utility model relates to a medical stent conveying structure, in particular to a stent conveying system capable of being accurately positioned.
Background
In the present invention, the term "proximal" refers to the end closer to the heart in the direction of blood flow, and "distal" refers to the end farther from the heart in the direction of blood flow. It will be appreciated that the intervention is often accessed from the femoral artery. The naked stent is usually used for lower limbs, and the purpose of the stent is to realize accurate positioning of the proximal stent, and the proximal stent is released firstly. The stent aims to realize accurate positioning of a distal stent and release the distal stent first.
With the rapid development of interventional therapy, the stent is a main means for treating systemic arterial diseases at present, the stent is an important component of interventional therapy, a bare stent is commonly used for arterial stenosis occlusion diseases, and a covered stent is commonly used for diseases such as aneurysms.
The current mainstream stent is mainly a nickel-titanium alloy self-expanding stent, the nickel-titanium alloy stent has a shape memory function, the stent is loaded into an outer sheath tube in a section-by-section extrusion mode, the stent is radially contracted to be consistent with the size of an inner cavity of a conveying sheath tube in the process, but the loaded stent is shortened in the axial direction, and the length of the original unloaded stent cannot be maintained. For a bare stent, the stent is too short to completely cover the stenotic occlusive lesion, and the stent is too long, which may affect the bifurcation blood vessel and the operation effect.
The stent after shortening is released may appear stent shortening, and then the far end positioning of the stent is inaccurate, which affects the judgment of the operator, and further may cause excessive plugging of the far end breach for the covered stent, which causes the branch blood vessel near the far end breach to generate plugging, which affects the blood supply of the important branch blood vessel.
Therefore, a stent delivery system capable of being precisely positioned becomes an urgent problem to be solved in the whole society.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the technical scheme provided by the utility model is as follows: a stent conveying system capable of accurately positioning comprises a movable sheath, a fixed sheath and a stent, wherein the fixed sheath is used for fixing the stent, the movable sheath comprises a handle, a stent length buckle, an inner sheath, a sheath inclined part, an outer sheath and an outer sheath positioning mark part, and the sheath inclined part and the outer sheath are integrally formed and are arranged at the front end of the inner sheath;
the fixed sheath tube comprises a fixed sheath tube side handle, a fixed sheath middle tube, a fixed sheath bracket fixing buckle, a fixing nut and a radiography side hole, wherein the fixed sheath tube side handle is hollow and is used for being communicated with the fixed sheath middle tube;
and a guide wire is arranged in the inner sheath tube.
Furthermore, the fixing buckle of the fixing sheath bracket is arranged at the outer side of the front end of the fixing sheath middle pipe and used for fixing the bracket, the outer side of the bracket is in contact with the outer sheath pipe, and the bracket is compressed and arranged between the outer sheath pipe and the fixing sheath middle pipe.
Further, the handle is arranged at the outer end of the inner sheath tube.
Further, the support length buckle is arranged on the outer side of the inner sheath tube, and the distance from the support length buckle to the fixing nut is the same as the length of the support.
Furthermore, the radiography side holes are at least provided with two groups and are all arranged at the front end of the fixed sheath-middle tube.
Furthermore, the fixed sheath pipe side handle is arranged on the fixed sheath pipe, and the bottom of the fixed sheath pipe side handle is obliquely arranged.
Further, the front end of the movable sheath is connected with the front end of the inclined part of the sheath.
Further, a channel matched with the guide wire is arranged in the handle.
Further, the length of the outer sheath pipe is matched with the length of the support, and the end part of the outer sheath pipe is obliquely arranged.
Compared with the prior art, the utility model advantage lies in: the utility model provides a precisely positioned proximal-first-release stent delivery system and method. The system has simple structure and convenient use. The conveying system can realize the near-end accurate positioning of the stent, and can avoid the overlong or too short stent caused by inaccurate release of the near-end of the stent through the near-end accurate positioning, avoid the situation that the too short stent can not completely cover the stenotic occlusive lesion, and the overlong stent can influence the bifurcated blood vessel and the operation effect. The sheath is carried, and the setting of radiography side opening more can let the support realize more accurate location, is worth further promoting.
Drawings
FIG. 1 is a schematic diagram of a precisely positionable stent delivery system according to the present invention;
FIG. 2 is a front view of a precisely positionable stent delivery system of the present invention;
FIG. 3 is a top view of a precisely positionable stent delivery system of the present invention;
fig. 4 is a schematic cross-sectional view at a in fig. 3.
As shown in the figure: 1. the device comprises a movable sheath tube 1-1, a handle 1-2, a bracket length buckle 1-3, an inner sheath tube 1-4, a sheath tube inclined part 1-5, an outer sheath tube 2, a fixed sheath tube 2-1, a fixed sheath tube side handle 2-2, a fixed sheath middle tube 2-3, a fixed sheath bracket fixing buckle 2-4, a fixing nut 2-5, an imaging side hole 3, a bracket 4 and a guide wire.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a stent conveying system capable of accurately positioning, which comprises a movable sheath tube 1, a fixed sheath tube 2 and a stent 3, wherein the fixed sheath tube 2 is used for fixing the stent 3, the movable sheath tube 1 comprises a handle 1-1, a stent length buckle 1-2, an inner sheath tube 1-3, a sheath tube inclined part 1-4, an outer sheath tube 1-5 and an outer sheath positioning mark part 1-6, and the sheath tube inclined part 1-4 and the outer sheath tube 1-5 are integrally formed and are arranged at the front end of the inner sheath tube 1-3;
the fixed sheath tube 2 comprises a fixed sheath tube side handle 2-1, a fixed sheath middle tube 2-2, a fixed sheath bracket fixing buckle 2-3, a fixing nut 2-4 and a radiography side hole 2-5, wherein the fixed sheath tube side handle 2-1 is hollow and is used for being communicated with the fixed sheath middle tube 2-2, the fixing nut 2-4 is arranged at the end part of the fixed sheath middle tube 2-2, and the fixed sheath middle tube 2-2 is connected with the inner sheath tube 1-3 through the fixing nut 2-4;
and a guide wire 4 is arranged inside the inner sheath tube 1-3.
The fixing buckle 2-3 of the fixing sheath bracket is arranged at the outer side of the front end of the fixing sheath middle tube 2-2 and used for fixing the bracket 3, the outer side of the bracket 3 is in contact with the outer sheath tube 1-5, and the bracket 3 is compressed and arranged between the outer sheath tube 1-5 and the fixing sheath middle tube 2-2. The handle 1-1 is arranged at the outer end of the inner sheath tube 1-3. The support length buckle 1-2 is arranged on the outer side of the inner sheath tube 1-3, and the distance from the support length buckle 1-2 to the fixing nut 2-4 is the same as the length of the support 3. The contrast side holes 2-5 are at least provided with two groups and are all arranged at the front end of the fixed sheath-tube 2-2. The fixed sheath pipe side handle 2-1 is arranged on the fixed sheath pipe 2-2, and the bottom of the fixed sheath pipe side handle is obliquely arranged. The front end of the movable sheath tube 1 is connected with the front ends of the inclined parts 1-4 of the sheath tubes. A channel matched with the guide wire 4 is arranged in the handle 1-1. The end parts of the outer sheath tubes 1-5 are obliquely arranged
As a further elaboration of the utility model, the length of the sheaths 1-5 is adapted to the length of the stent 3, just enough to accommodate the stent 3.
As further elaboration of the utility model, a fixing sheath bracket fixing buckle 2-3 is arranged at the front end of a fixing sheath middle tube 2-2, and is radio-opaque and convenient for positioning the head end of the bracket 3.
As a further elaboration of the utility model, a guide wire channel is provided in the middle of the handle 1-1, facilitating flushing of the guide wire channel and access to the guide wire 4.
As a further elaboration of the utility model, the end parts of the outer sheath tubes 1-5 are obliquely arranged, so that the situation that the stent is embedded with the sheath tube when the sheath tube is recovered after the stent 3 is released is avoided, and the sheath can be ensured to smoothly exit.
The specific embodiment of the utility model is as follows:
taking the occlusion of the femoral artery initial segment as an example, the diameter of the femoral artery is larger than that of the femoral artery, the former anterior release system of the stent 3 can only realize the accurate positioning of the far end, the initial position of the femoral artery is not positioned, the blood flow of the femoral artery can be influenced if the stent 3 is too long to cover the opening of the femoral artery, and the stent 3 is too short to completely cover the initial lesion of the femoral artery.
In the specific embodiment, when the guide wire 4 smoothly passes through the occlusion section, the preparation for balloon expansion before the release of the stent 3 is completed, after the distal end of the narrow section is positioned by the front release system of the common stent 3, the stent is released and is ready to enter the stent delivery system of the utility model, before entering the vascular cavity, heparin water washing of the guide wire 4 channel at the tail end of the handle is firstly carried out, and then the fixing nuts 2-4 are screwed, so that the movable sheath 1 and the fixed sheath 2 cannot move, the stent 3 is prevented from being released in advance, and the heparin water washing is carried out on the channel at the side handle of the fixed sheath 2 until heparin water flows out from the side contrast hole 2-5.
After the fixing nuts 2-4 are screwed, the stent delivery system is entered, so that the sheath positioning marks 1-6 are preliminarily positioned at the starting position of the superficial femoral artery, an operator injects a contrast agent into a channel of the side handle 2-1 of the fixed sheath tube, the contrast agent flows out through the contrast side holes 2-5 for development after being positioned in a middle cavity between the fixed sheath tube 1 and the inner sheath tube 1-3, and the openings of the deep femoral artery and the superficial femoral artery are judged again, so that the accurate positioning of the proximal end of the stent is realized. After the positioning is carried out again, the operator unscrews the elastic nut, grasps the side handle of the fixed sheath tube 2.1 with one hand, slowly advances the movable sheath tube 1 along the guide wire 4 with the other hand, and the fixed sheath bracket fixing buckle 2-3 can help the bracket to be fixed on the fixed sheath tube 2, so that the bracket 3 is prevented from advancing along with the outer sheath tube 1-5. When the movable sheath 1 advances, the fixing nut 2-4 touches the bracket length buckle 1-2 of the movable sheath 1, the bracket 3 is just completely released, and the movable sheath 1 is prevented from advancing too far. And at the moment, the fixing buckle 2-3 of the fixing sheath bracket is overlapped with the positioning mark part 1-6 of the outer sheath. After the support 3 is released, the slope arrangement of the tail end of the outer sheath tube 1-5 can be avoided, the support 3 is prevented from being embedded with the sheath tube when the sheath tube is recovered after the support 3 is released, and the sheath can be ensured to smoothly exit.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (9)
1. The utility model provides a but accurate positioning's support conveying system which characterized in that: the sheath tube fixing device comprises a movable sheath tube (1), a fixed sheath tube (2) and a support (3), wherein the fixed sheath tube (2) is used for fixing the support (3), the movable sheath tube (1) comprises a handle (1-1), a support length buckle (1-2), an inner sheath tube (1-3), a sheath tube inclined part (1-4), an outer sheath tube (1-5) and an outer sheath positioning mark part (1-6), and the sheath tube inclined part (1-4) and the outer sheath tube (1-5) are integrally formed and are arranged at the front end of the inner sheath tube (1-3);
the fixed sheath tube (2) comprises a fixed sheath tube side handle (2-1), a fixed sheath middle tube (2-2), a fixed sheath support fixing buckle (2-3), a fixed nut (2-4) and a contrast side hole (2-5), the fixed sheath tube side handle (2-1) is hollow and is used for being communicated with the fixed sheath middle tube (2-2), the fixed nut (2-4) is arranged at the end part of the fixed sheath middle tube (2-2), and the fixed sheath middle tube (2-2) is connected with the inner sheath tube (1-3) through the fixed nut (2-4);
and a guide wire (4) is arranged inside the inner sheath tube (1-3).
2. A precisely positionable stent delivery system according to claim 1, wherein: the fixing buckle (2-3) of the fixing sheath support is arranged on the outer side of the front end of the fixing sheath middle pipe (2-2) and used for fixing the support (3), the outer side of the support (3) is in contact with the outer sheath pipe (1-5), and the support (3) is compressed and installed between the outer sheath pipe (1-5) and the fixing sheath middle pipe (2-2).
3. A precisely positionable stent delivery system according to claim 1, wherein: the handle (1-1) is arranged at the outer end of the inner sheath tube (1-3).
4. A precisely positionable stent delivery system according to claim 1, wherein: the support length buckle (1-2) is arranged on the outer side of the inner sheath tube (1-3), and the distance from the support length buckle (1-2) to the fixing nut (2-4) is the same as the length of the support (3).
5. A precisely positionable stent delivery system according to claim 1, wherein: the contrast side holes (2-5) are at least provided with two groups and are all arranged at the front end of the fixed sheath-in tube (2-2).
6. A precisely positionable stent delivery system according to claim 1, wherein: the fixed sheath tube side handle (2-1) is arranged on the fixed sheath tube (2-2), and the bottom of the fixed sheath tube side handle is obliquely arranged.
7. A precisely positionable stent delivery system according to claim 1, wherein: the front end of the movable sheath tube (1) is connected with the front end of the inclined part (1-4) of the sheath tube.
8. A precisely positionable stent delivery system according to claim 1, wherein: a channel matched with the guide wire (4) is arranged in the handle (1-1).
9. A precisely positionable stent delivery system according to claim 1, wherein: the length of the outer sheath tube (1-5) is matched with that of the bracket (3), and the end part of the outer sheath tube (1-5) is obliquely arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122865277.9U CN216603200U (en) | 2021-11-22 | 2021-11-22 | Support conveying system capable of being accurately positioned |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122865277.9U CN216603200U (en) | 2021-11-22 | 2021-11-22 | Support conveying system capable of being accurately positioned |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216603200U true CN216603200U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122865277.9U Active CN216603200U (en) | 2021-11-22 | 2021-11-22 | Support conveying system capable of being accurately positioned |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216603200U (en) |
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2021
- 2021-11-22 CN CN202122865277.9U patent/CN216603200U/en active Active
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