CN210277422U

CN210277422U - Conveyor

Info

Publication number: CN210277422U
Application number: CN201822277988.2U
Authority: CN
Inventors: 王刚; 江巍; 李郴飞
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-04-10
Anticipated expiration: 2028-12-29

Abstract

The utility model relates to a conveyor, including hollow inner core pipe and with the hollow end that the distal end of inner core pipe is connected, and the cover is located the pot head of inner core pipe distal end, the distal end of pot head with the near-end of end is connected, the surface of pot head is smooth, just be equipped with at least one first exhaust hole on the end, be equipped with at least one second exhaust hole on the pot head, at least one first exhaust hole and at least one second exhaust hole intercommunication, so that the fluid is followed the near-end of pot head flows in the back, warp at least one second exhaust hole with at least one first exhaust hole is followed the end flows out. The utility model discloses a conveyer can not scrape internal tissue when percutaneous puncture, can not cause the conveyer puncture unsmooth yet, can also make the inside washing and the exhaust of conveyer more thorough.

Description

Conveyor

Technical Field

The utility model relates to an intervene medical instrument technical field, especially relate to a conveyer that is used for implants such as delivery support.

Background

In recent years, stent graft intervention has been frequently used for treatment of diseases such as aneurysm, and the treatment method is becoming the mainstream for treatment of diseases such as aortic aneurysm due to low cost, short treatment period, and small wound on human body. The conveyer of the covered stent plays an important role in the interventional therapy process of the covered stent, the far end of the existing conveyer is provided with an end head and an end sleeve which are connected with each other, the end sleeve is provided with a step structure, the outer diameter of the far end of the end sleeve is larger than that of the near end of the end sleeve, and after a sheath pipe on the conveyer moves along the axial direction of the conveyer and is sleeved on the outer surface of the end sleeve, the sheath pipe can be cleaned and exhausted through the radial gap between the sheath pipe and the end sleeve. However, due to the existence of the step structure on the end sleeve, when the conveyor is punctured percutaneously, the outer surface of the end sleeve is not smooth, and the step part has obvious sharp positions, so that the tissue in the body is easily scraped, and the percutaneous puncture of the conveyor is not smooth.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a new delivery device for percutaneous puncture, which is capable of easily scraping the tissue in the body and causing unsmooth puncture.

The utility model provides a conveyer, including hollow inner core pipe and with the hollow end that the distal end of inner core pipe is connected, and the cover is located the pot head of inner core pipe distal end, the distal end of pot head with the near-end of end is connected, the surface of pot head is smooth, just be equipped with at least one first exhaust hole on the end, be equipped with at least one second exhaust hole on the pot head, at least one first exhaust hole and at least one second exhaust hole intercommunication, so that the fluid is followed the near-end of pot head flows in the back, the warp at least one second exhaust hole with at least one first exhaust hole is followed the end flows out.

In one embodiment, at least one first exhaust groove is further formed in the side wall of the head, and at least one first exhaust hole is communicated with one first exhaust groove.

In one embodiment, the conveyor further comprises a sheath tube sleeved on the inner core tube, and the maximum outer diameter of the end sleeve is equal to the distal inner diameter of the sheath tube.

In one embodiment, the proximal outer diameter of the tip is equal to the distal outer diameter of the tip sleeve.

In one embodiment, the distal end of the sheath tube is a tapered tube, and an included angle between the side surface of the tapered tube and the central axis of the sheath tube is less than or equal to 45 degrees.

In one embodiment, when the sheath is sleeved on the end sleeve, the overlapping length of the sheath and the end sleeve along the axial direction of the sheath ranges from 3mm to 200 mm.

In one embodiment, the distal end of the end sleeve is provided with a first hollow tube, the inner diameter of the first hollow tube is equal to the inner diameter of the end sleeve, the wall thickness of the first hollow tube is smaller than that of the end sleeve, and the first hollow tube can be inserted into the proximal end of the end head to fix the end head and the end sleeve.

In one embodiment, the maximum width of the first exhaust groove is greater than or equal to the aperture of the first exhaust hole.

In one embodiment, the conveyor further comprises an outer core tube sleeved between the inner core tube and the sheath tube, the distal end of the outer core tube is sleeved with a fixed anchor, the side wall of the fixed anchor is provided with at least one second air exhaust groove, and the at least one second air exhaust groove is communicated with the at least one second air exhaust hole.

In one embodiment, the end sleeve comprises a second hollow tube and a cover disposed at a distal end of the end sleeve, the cover has a central hole, the at least one second vent hole is disposed in the cover, and the at least one second vent hole and the central hole are both in communication with the cavity of the second hollow tube.

Among the above-mentioned conveyer, the surface of pot head is smooth, therefore can not scrape internal tissue when percutaneous puncture, can not cause the conveyer puncture not smooth and easy yet, in addition, because be equipped with at least one first exhaust hole on the end, be equipped with at least one second exhaust hole on the pot head, at least one first exhaust hole and at least one second exhaust hole intercommunication, thereby make the fluid can follow the near-end of pot head through each second exhaust hole inflow back, flow through each first exhaust hole on the end again, also flow from the inside of end, make the inside of conveyer can wash and exhaust more thoroughly.

Drawings

FIG. 1 is a partial schematic structural view of a conveyor according to embodiment 1;

FIG. 2 is a schematic view of the tip of FIG. 1;

FIG. 3 is a schematic structural view of the end fitting of FIG. 1;

FIG. 4 is another schematic structural view of an end sleeve of the conveyor of embodiment 1;

FIG. 5 is a partial schematic view of the structure of a conveyor according to embodiment 2;

FIG. 6 is a schematic view of the tip of FIG. 5;

FIG. 7 is a partial schematic view of the structure of a conveyor according to embodiment 3;

FIG. 8 is a schematic structural view of the end sleeve of FIG. 7;

fig. 9 is a cross-sectional view of the end fitting of fig. 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the field of interventional medical devices, the end of a medical device implanted in a human or animal body closer to an operator is generally referred to as the "proximal end", the end farther from the operator is referred to as the "distal end", and the "proximal end" and the "distal end" of any component of the medical device are defined according to this principle. "axial" generally refers to the length of the medical device as it is being delivered, and "radial" generally refers to the direction of the medical device perpendicular to its "axial" direction, and defines both "axial" and "radial" directions for any component of the medical device in accordance with this principle.

The technical solution of the present invention will be further described in detail with reference to the following specific examples.

Example 1

Embodiment 1 provides a conveyor, including hollow inner core pipe and the hollow end head of being connected with the distal end of inner core pipe to and the pot head of the distal end of cover setting in the inner core pipe, the distal end of pot head is connected with the near-end of end head, is equipped with at least one first exhaust hole on the end head, is equipped with at least one second exhaust hole on the pot head, and at least one first exhaust hole communicates with at least one second exhaust hole, so that after the fluid flows in from the near-end of pot head, flows out from the end head through second exhaust hole and first exhaust hole.

Specifically, referring to fig. 1, the conveyor 100 of embodiment 1 includes a hollow inner core tube 110, a hollow push rod 120, a hollow sheath tube 130, an end 140 connected to a distal end of the inner core tube 110 and communicating with a cavity, and an end sleeve 150 fixedly sleeved on the distal end of the inner core tube 110, wherein a distal end of the end sleeve 150 is fixedly connected to a proximal end of the end 140, the inner core tube 110 is further sleeved with an outer core tube 160, a distal end of the push rod 120 is fixedly connected to a proximal end of the outer core tube 160, the outer core tube 160 and the push rod 120 can axially move relative to the inner core tube 110, and the sheath tube 130 can axially move relative to the outer core tube 160.

Referring to fig. 2, the tip 140 is provided with a plurality of first exhaust holes 141 at intervals along a circumferential direction thereof, a length direction of the plurality of first exhaust holes 141 is identical to a length direction of the tip, the first exhaust holes 141 are located inside a sidewall of the tip 140, and openings at both ends of the first exhaust holes 141 are respectively communicated with the outside. Referring to fig. 3, the end sleeve 150 is provided with a plurality of second vent holes 151, and the plurality of second vent holes 151 on the end sleeve 150 are respectively in one-to-one correspondence with the plurality of first vent holes 141 on the tip 140, so that fluid (liquid and/or gas) can flow in from the proximal end of the end sleeve 150 through the respective second vent holes 151, and then flow out through the respective first vent holes 141 on the tip 140, that is, flow out from the interior of the tip 140. Therefore, when the sheath 130 compresses and contains the stent and other implants on the conveyor 100, after injecting liquid such as heparin normal saline from the proximal end of the conveyor 100, the liquid can flow into the proximal end of the end sleeve 150 from the proximal end of the conveyor 100 through the inside of the conveyor 100, and flow into the proximal end of the end sleeve 150 and flow out from the distal end of each first exhaust hole 141 on the head 140, so that the inside of the conveyor 100 and the stent and other implants can be cleaned, and all gas in the conveyor 100 can be exhausted.

In this embodiment, the number of the first exhaust holes 141 is equal to the number of the second exhaust holes 151, and the aperture of the first exhaust holes 141 is equal to the aperture of the second exhaust holes 151, in another embodiment, the number of the second exhaust holes 151 may be greater than the number of the first exhaust holes 141, or the number of the first exhaust holes 141 is greater than the number of the second exhaust holes 151, as long as each of the first exhaust holes 141 can be correspondingly communicated with at least one of the second exhaust holes 151, or each of the second exhaust holes 151 can be communicated with at least one of the first exhaust holes 141. Preferably, the maximum aperture of the first vent hole 141 and/or the second vent hole 151 is greater than or equal to 0.7mm, so that the first vent hole 141 and the second vent hole 151 cooperate to rapidly discharge liquid or gas.

The tip 140 is hollow inside, and the lumen of the tip 140 communicates with the lumen of the inner core tube 110 to serve as a passage for a guide wire. The proximal end of the tip 140 is an annular body 142 with the same outer diameter, and the outer diameter of the tip 140 gradually decreases from the proximal end of the tip 140 to the distal end thereof, and the diameter of the first venting holes 141 also decreases from the proximal end to the distal end thereof. The outer diameter of the distal end of the tip 140 is 1.5mm-2.5mm, which not only ensures that the tip 140 is convenient for blood vessel puncture, but also does not stab the tissues in the body in the puncture process.

The tip 140 is made of a polymer material with good flexibility, so that the tip has good bending performance and can pass through a complex and bent blood vessel along with a guide wire. The outer surface of tip 140 is smooth to reduce resistance during penetration. The tip 140 and the end cap 150 may be integrally injection molded or may be connected together by glue or the like.

The tip cover 150 is a hollow cylindrical tube, a plurality of second exhaust holes 151 are formed on the wall of the tip cover 150 to penetrate the wall along the length direction thereof, and the proximal outer diameter of the tip 140 is equal to the distal outer diameter of the tip cover 150, so that the portion of the tip 140 connected to the tip cover 150 does not scrape the inner wall of the body tissue. Further, the maximum outer diameter of the end cap 150 is equal to or very small difference from the inner diameter of the distal end of the sheath 130, so that there is almost no gap between the sheath 130 and the end cap 150, and the distal end of the sheath 130 can smoothly transition to the outer surface of the end cap 150 or the tip 140 without scraping the tissue in the body. In another embodiment, referring to fig. 4, a first hollow tube 152 may be additionally disposed at the distal end of the end cap 150, the inner diameter of the first hollow tube 152 is equal to the inner diameter of the end cap 150, the wall thickness of the first hollow tube 152 is smaller than the wall thickness of the end cap 150, and the first hollow tube 152 may be coated with an adhesive on the outer surface thereof and then inserted into the proximal end of the tip 140, so as to fix the tip 140 and the end cap 150 together, thereby increasing the contact area between the tip 140 and the end cap 150, so as to enhance the connection strength between the tip 140 and the end cap 150, and prevent the tip 140 and the end cap 150 from falling off or separating during a clinical procedure. Furthermore, a plurality of small holes 153 can be formed in the wall of the first hollow tube 152, and after the proximal end of the tip 140 is sleeved on the first hollow tube 152, the tip 140 and the end sleeve 150 are further connected together by the adhesive injected into the plurality of small holes 153, so that not only is the contact area between the tip 140 and the end sleeve 150 increased, but also the connection strength between the tip 140 and the end sleeve 150 is further enhanced. The number, shape, distribution, etc. of the apertures 153 in the first hollow tube 152 are not limited herein. In other embodiments, the tip 140 and the end cap 150 may be coupled by threads or the like.

When the sheath tube 130 is sleeved outside the outer core tube 160, an annular cavity is formed between the sheath tube 130 and the outer core tube 160, the compressed implant such as a stent is accommodated in the annular cavity, and a gap is still formed between the sheath tube 130 and the outer core tube 160 to allow fluid or gas to flow. The distal end of the sheath 130 is tapered, and the tapered portion of the sheath 130 may be disposed over the proximal portion of the tip 140 to completely cover the end cap 150 or may only partially cover the end cap 150. The included angle between the side surface of the conical tube part and the central axis of the sheath tube 130 is less than or equal to 45 degrees, preferably 25 degrees, because the outer diameter of the distal end of the sheath tube 130 is gradually reduced from the proximal end to the distal end, the distal end of the sheath tube 130 can be smoothly transited with the tip 140 or the end sleeve 150, the resistance of the conveyor 100 in the percutaneous puncture process is reduced, and because the sheath tube 130 and the tip 140 or the end sleeve 150 almost have no clearance in the radial direction, the phenomenon of the percutaneous puncture unsmooth in the clinical operation process can be better avoided. After the stent is completely released, the sheath 130 and the tip 140 or the end sleeve 150 have no gap in the radial direction during the process of withdrawing the transporter 100 out of the body, and the stent is not scratched, so that the accuracy of stent positioning can be improved.

When the sheath 130 moves towards the far end along the axial direction of the conveyor 100 and is sleeved on the end sleeve 150, the stent is completely compressed and accommodated in the annular cavity between the sheath 130 and the outer core 160, at this time, the overlapping length of the sheath 130 and the end sleeve 150 along the axial direction of the sheath 130 ranges from 3mm to 200mm, and because the sheath 130 and the end sleeve 150 or the end head 140 almost have no gap in the radial direction, the sheath 130 can be ensured to be shortened in the high-temperature sterilization process or to be bumped in the conveying process and separated from the end sleeve 150 to a certain extent, and the phenomenon that the percutaneous puncture is not smooth in the clinical operation process due to the radial gap generated between the sheath 130 and the end sleeve 150 can be avoided.

Example 2

The same parts of the conveyor 200 of embodiment 2 and the conveyor 100 of embodiment 1 are not repeated herein, but the differences between them mainly include that, referring to fig. 5 and 6, at least one first exhaust groove 243 is further provided on the sidewall of the tip 240, and at least one first exhaust hole 241 is communicated with the first exhaust groove 243, so that the fluid can flow in from the proximal end of the end sleeve 250 through each second exhaust hole, and then sequentially flow out through each first exhaust hole 241 and the first exhaust groove 243 on the tip 240. The head 240 provided with the first exhaust groove 243 can exhaust liquid or gas more rapidly than the conveyor 100 of embodiment 1, and the manufacturing process is simpler and easier to implement. Further, the maximum width of the first exhaust groove 243 is greater than or equal to the aperture of the first exhaust hole 241, so that liquid or gas can be rapidly exhausted from the conveyor 200, and the operation time is saved.

Example 3

The same parts of the conveyor 300 of embodiment 3 as those of the conveyor 200 of embodiment 2 will not be described in detail, and the difference between the two parts is mainly that, in embodiment 3, as shown in fig. 7-9, the distal end of the outer core tube 360 is sleeved with a fixed anchor 370, the fixed anchor 370 is fixedly connected with the outer core tube 360, the distal end of the fixed anchor 370 can move towards the distal end along with the outer core tube 360 and extend into the interior of the end cap 350, the end cap 350 comprises a second hollow tube 351 and a sealing cap 352 arranged at the distal end of the end cap 350, the sealing cap 352 has a central hole 353, the sealing cap 352 is provided with at least one second exhaust hole 354, the second exhaust hole 354 and the central hole 353 are both communicated with the cavity of the second hollow tube 351, the side wall of the fixed anchor 370 is provided with at least one second exhaust groove 371, the at least one second exhaust groove 371 is communicated with the cavity of the second hollow tube 351, thereby allowing fluid or gas to flow in through the proximal end of the anchor 370 and out of the interior of the tip.

In this embodiment, two second exhaust holes 354 are formed in the cover 352, and the two second exhaust holes 354 are respectively located at two sides of the central hole 353 and are symmetrically arranged. In other embodiments, more than two second exhaust holes 354 may be disposed on the cover 352, and the position of the second exhaust holes 354 on the cover 352 is not limited as long as the second exhaust holes 354 are communicated with the cavity of the second hollow tube 351. Further, a first hollow tube 152 as described in example 1 may be further provided on the end cap 350, and the proximal end of the first hollow tube 152 is inserted into the central hole 353 to be fixedly connected with the second hollow tube 351. The structure, material, processing manner and other features of the first hollow tube 152 are the same as those described in embodiment 1, and are not repeated herein.

The anchor 370 is used to secure the proximal end of the stent (the end corresponding to the flow of blood into a segment of a vessel) to the anchor 370 to control the eventual release of the stent by axial movement of the inner core tube. The sidewall of the anchor 370 is provided with a plurality of second vent grooves 371 at intervals along the circumference thereof, and the length direction of each second vent groove 371 is the same as the axial direction of the anchor 370 or has an included angle smaller than 90 degrees, so that fluid can flow in from the proximal end of the anchor 370 and then flow out from the distal end thereof. A plurality of second vent grooves 371 in anchor 370 communicate with first vent grooves 343 in head 340, first vent holes and second vent holes 354 in sleeve 350 to provide a fluid-venting passageway within carrier 300. Other structural features of the tie-down anchor 370 are the same as in the prior art and will not be described further herein.

When the sheath 330 moves axially to cover the anchor 370, the minimum distance between the anchor 370 and the sheath 330 is greater than 0.5mm, and the minimum distance between the sheath 330 and the second air vent 371 is greater than 0.7mm, so that when fluid such as heparin-bloom saline flows through the channel of the second air vent 371, the resistance to the fluid is small, and the fluid can be discharged smoothly and rapidly. In addition, the exhaust channel inside the conveyor 300 of the present embodiment penetrates the entire conveyor 300, and the heparin-bloom saline flows through each part inside the conveyor 300, so that the cleaning has no dead angle, and all the gas in the channel can be exhausted.

It should be noted that the design of the anchor 370 is not limited to the embodiment, as long as the anchor 370 can maintain a sufficient gap with the sheath 330 after the stent is fixed and loaded, so that the liquid such as heparin-saline can smoothly pass through the anchor.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a conveyer, including hollow inner core pipe and with the hollow end head that the distal end of inner core pipe is connected, and the cover is located the pot head of inner core pipe distal end, the distal end of pot head with the near-end of end is connected, its characterized in that, the surface of pot head is smooth, just be equipped with at least one first exhaust hole on the end head, be equipped with at least one second exhaust hole on the pot head, at least one first exhaust hole and at least one second exhaust hole intercommunication, so that the fluid is followed the near-end of pot head flows into the back, the warp at least one second exhaust hole with at least one first exhaust hole is followed the end flows out.

2. The conveyor of claim 1 wherein said head side wall further defines at least one first exhaust channel, at least one of said first exhaust holes communicating with one of said first exhaust channels.

3. The conveyor according to claim 1, further comprising a sheath tube disposed around said inner core tube, said end sleeve having a maximum outer diameter equal to a distal inner diameter of said sheath tube.

4. The conveyor of claim 3 wherein the proximal outer diameter of said tip is equal to the distal outer diameter of said sleeve.

5. The delivery apparatus according to claim 3, wherein the distal end of the sheath is a tapered tube, and an angle between a side surface of the tapered tube and a central axis of the sheath is less than or equal to 45 degrees.

6. The conveyor according to claim 3, characterized in that the overlapping length of said sheath and said end sleeve in the axial direction of said sheath ranges from 3mm to 200mm when said sheath is fitted over said end sleeve.

7. The carrier as in claim 1, in which said sleeve has a first hollow tube at a distal end, said first hollow tube having an inner diameter equal to the inner diameter of said sleeve, said first hollow tube having a wall thickness less than the wall thickness of said sleeve, said first hollow tube being insertable into a proximal end of said tip to secure said tip to said sleeve.

8. Conveyor according to claim 2, characterized in that the maximum width of the first exhaust groove is greater than or equal to the aperture of the first exhaust hole.

9. The conveyor according to claim 3, further comprising an outer core tube sleeved between the inner core tube and the sheath tube, wherein a fixed anchor is sleeved at a distal end of the outer core tube, at least one second air exhaust groove is formed in a side wall of the fixed anchor, and the at least one second air exhaust groove is communicated with the at least one second air exhaust hole.

10. The carrier as in claim 1, in which the sleeve includes a second hollow tube and a cap at the distal end of the sleeve, the cap having a central opening, the at least one second vent opening being in the cap, the at least one second vent opening and the central opening being in communication with the cavity of the second hollow tube.