Support releasing device facilitating effective withdrawing of seeker

Abstract

The utility model provides a support releasing device facilitating effective withdrawing of a seeker. The support releasing device comprises an outer pipe, a middle pipe, an inner pipe, a first handle connected with the outer pipe, a second handle connected with the middle pipe and a tail handle connected with the inner pipe, wherein the outer pipe, the middle pipe and the inner pipe are sequentially arranged in a sleeved mode from outside to inside. A guide head is arranged at the front end of the inner tube and located at the front end of the outer tube, and the outer diameter of the guide head is larger than the inner diameter of the outer tube. The middle pipe is in sliding connection with the outer pipe, and the middle pipe is in sliding connection with the inner pipe; the front end of the support is arranged between the outer pipe and the inner pipe in a sleeved mode, and the rear end of the support is arranged between the front end of the middle pipe and the outer pipe in a sleeved mode. According to the support releasing device facilitating effective withdrawing of the seeker, the dangerous situation that the seeker cannot withdraw due to the fact that the support is compressed can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a stent release device that facilitates the effective retraction of the guide head. Background Technology

[0002] Nonvascular stents are medical devices used to expand and support nonvascular lumens, including esophageal stents, urethral stents, biliary stents, airway stents, and colonic stents. They are widely used in the esophagus, intestines, bile duct, trachea, urethra, and other sites to treat diseases of the respiratory, digestive, and urinary systems. They are used to treat luminal stenosis caused by benign or malignant factors or to reconstruct the structure and function of lumines.

[0003] During the placement of non-vascular stents into body cavities, the delivery tube can pass through relatively narrow sections of the cavity before the stent is deployed. However, once deployed, the stent will contract to some extent due to the pressure within the confined space. This contraction can affect the retraction of the guide tip of the delivery device. If the guide tip cannot retract, the delivery tube must be forcibly removed, resulting in stent displacement. This situation is extremely dangerous in non-vascular surgeries that require rapid completion. Utility Model Content

[0004] This invention provides a support release device that facilitates the effective retraction of the guide head to solve at least one of the above-mentioned problems.

[0005] According to one aspect of the present invention, a support release device is provided for facilitating effective retraction of the guide head, comprising an outer tube, a middle tube, and an inner tube sequentially arranged from the outside to the inside, and a first handle connected to the outer tube, a second handle connected to the middle tube, and a tail handle connected to the inner tube; the front end of the inner tube is provided with a guide head, which is located at the front end of the outer tube, and the outer diameter of the guide head is larger than the inner diameter of the outer tube; the middle tube is slidably connected to the outer tube, and the middle tube is slidably connected to the inner tube; the front end of the support is sleeved between the outer tube and the inner tube, and the rear end of the support is sleeved between the front end of the middle tube and the outer tube.

[0006] This utility model's stent release device, which facilitates effective retraction of the guide head, includes a tail handle connected to the inner tube, which is slidably connected to the middle tube. When the stent delivery tube is inserted into the designated position within the body cavity, the second handle remains stationary. Pulling the first handle backward causes the outer tube to move backward, gradually releasing and opening the front end of the stent. Simultaneously, pulling the tail handle backward causes the inner tube and guide head to move backward. During stent release, the guide head, positioned inside the stent, gradually moves towards the rear end. As the front end of the outer tube reaches the rear end of the stent, the stent is fully released, and the guide head detaches from the rear end, allowing for smooth retraction and preventing the guide head from being unable to retract due to stent compression. Finally, the entire stent release device is withdrawn from the body cavity.

[0007] In some embodiments, a visible / hidden ring is provided on the outer side of the front end of the central tube of this invention.

[0008] In some embodiments, a booster tube is sleeved between the inner tube and the middle tube of this invention. This allows for smoother relative sliding between the inner tube and the middle tube.

[0009] In some embodiments, the booster tube of this invention is made of stainless steel. This also helps to increase the strength of the support release tube.

[0010] In some embodiments, the first handle of this invention is provided with a fixing button for fixing the position of the first handle relative to the middle tube.

[0011] In some embodiments, the rear end of the second handle of this invention is provided with a receiving groove for accommodating the tailstock. This allows the tailstock to be stored in the receiving groove, reducing the overall size of the support release device.

[0012] In some embodiments, the first handle of this invention is a hollow tube, with the middle tube and inner tube passing through the first handle.

[0013] In some embodiments, the second handle of this invention is a hollow tube with an inner tube passing through it.

[0014] In some embodiments, the front end of the middle tube of this invention is provided with an annular fixing block, the outer diameter of which is larger than the outer diameter of the middle tube and smaller than the inner diameter of the outer tube; the fixing block is sleeved on the outside of the inner tube; the front end of the bracket is sleeved between the outer tube and the inner tube, and the rear end of the bracket is sleeved between the fixing block and the outer tube. Thus, after the stent release tube is inserted into the human body cavity, if the position of the stent is found to be unsuitable during the release process, the first handle can be pushed towards the front end of the stent. The first handle moves the front end of the outer tube towards the front end of the stent, retracting the partially released stent into the outer tube. After the front end of the stent release tube is adjusted to a suitable position, the stent can be released again.

[0015] In some embodiments, the length of the fixing block of this invention is 6-10 mm. This ensures that the fixing block can be firmly pressed against the rear end of the bracket, while also preventing excessive friction between the fixing block and the inner diameter of the outer tube from causing obstruction to the sliding of the outer tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a support release device that facilitates effective retraction of the guide head according to one embodiment of the present invention.

[0017] Figure 2 for Figure 1 The diagram shows the structure of the support release device, which facilitates the effective retraction of the guide head, during the support release process.

[0018] Figure 3 for Figure 1 An enlarged view of point A shown in the diagram;

[0019] Figure 4 for Figure 2 An enlarged view of point B shown in the diagram;

[0020] Figure 5 This is a schematic diagram of a support release device for facilitating effective retraction of the guide head, according to another embodiment of the present invention.

[0021] Figure 6 for Figure 5 The diagram shows the structure of the support release device, which facilitates the effective retraction of the guide head, during the support release process.

[0022] Figure 7 for Figure 5 An enlarged schematic diagram of point C is shown below;

[0023] Figure 8 for Figure 6 The enlarged schematic diagram at point D is shown. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0026] Finally, it should be noted that in this document, relational terms such as first and second, counterclockwise and clockwise, forward and reverse are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising" or "including" include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Figure 1 and Figure 3 The structure of a support release device that facilitates effective retraction of the guide head according to one embodiment of the present invention is schematically shown.

[0029] refer to Figure 1 and Figure 3 As shown, the stent release device, which facilitates effective retraction of the guide head, includes a stent delivery tube and an operating handle. The stent delivery tube includes an outer tube 11, a middle tube 12, and an inner tube 13. The operating handle includes a first handle 21, a second handle 22, and a tail handle 23.

[0030] The outer tube 11, middle tube 12, and inner tube 13 are sequentially fitted from the outside in. The outer tube 11 is connected to the first handle 21, which is a hollow tube, through which the middle tube 12 and inner tube 13 pass. The middle tube 12 is connected to the second handle 22, which is also a hollow tube, through which the inner tube 13 passes. The inner tube 13 is connected to the tailstock 23.

[0031] The inner tube 13 is provided with a guide head 30 at its front end. The guide head 30 is located at the front end of the outer tube 11, and the outer diameter of the guide head 30 is larger than the inner diameter of the outer tube 11.

[0032] The middle tube 12 is slidably connected to the outer tube 11, and the middle tube 12 is slidably connected to the inner tube 13. The front end of the support 10 is sleeved between the outer tube 11 and the inner tube 13, and the rear end of the support 10 is sleeved between the front end of the middle tube 12 and the outer tube 11.

[0033] A concealed ring 15 is provided on the outer front end of the central tube 12. The concealed ring 16 facilitates the doctor's observation of whether the stent 10 is close to complete release.

[0034] A booster tube 16 is sleeved between the inner tube 13 and the middle tube 12 to facilitate smoother relative sliding between them. In this embodiment, the booster tube 16 is made of stainless steel, which also increases the strength of the support release tube. In other embodiments, the booster tube 16 may also be made of polymer materials such as PP, PE, or PEEK.

[0035] The first handle 21 is provided with a fixing button 211 for fixing the position of the first handle 21 relative to the middle tube 12.

[0036] The rear end of the second handle 22 is provided with a receiving groove 221 for accommodating the tail handle 23. The tail handle 23 can be stored in the receiving groove 221, reducing the overall size of the bracket release device.

[0037] Figure 2 schematically shown Figure 1 The structure shown is that of a support release device that facilitates effective retraction of the guide head during the support release process.

[0038] refer to Figure 2 As shown, when the stent delivery tube is inserted into the designated position in the human body cavity, the position of the second handle 22 is kept still, the fixing button 211 on the first handle 21 is released, and the first handle 21 is pulled backward, causing the first handle 21 to move towards the second handle 22. The first handle 21 drives the outer tube 11 to move backward, and the front end of the stent 10 gradually releases and opens; at the same time, the tail handle 23 is pulled backward, causing the tail handle 23 to move away from the second handle 22. The tail handle 23 drives the inner tube 13 and the guide head 30 to move backward. During the release of the stent 10, the guide head 30 is also gradually moved backward due to the traction of the inner tube 13, so the guide head 30 remains inside the stent 10 and gradually moves towards the rear end of the stent 10. As the front end of the outer tube 11 gradually moves to the rear end of the stent 10 until the stent 10 is completely released, the guide head 30 also disengages from the rear end of the stent 10. The guide head 30 retracts smoothly, avoiding the risk that the guide head 30 cannot retract due to compression of the stent 10. Finally, the fixing button 211 on the first handle 21 is locked, and the second handle 22 is pulled to remove the stent release tube entirely from the body cavity.

[0039] Figure 4 The diagram schematically illustrates the connection structure between the outer tube and the first handle of a bracket release device that facilitates effective retraction of the guide head, according to one embodiment of the present invention.

[0040] refer to Figure 4As shown, the rear end of the outer tube 11 is flared, and the first handle 21 is provided with a hollow external thread rod 213 and a nut 212 that is adapted to the external thread rod 213. The rear end of the outer tube 11 is sleeved on the external thread rod 213. Tightening the nut 212 can fix the outer tube 11 to the first handle 21.

[0041] Figure 5 and Figure 7 The diagram schematically illustrates the structure of a support release device that facilitates effective retraction of the guide head, according to another embodiment of the present invention.

[0042] refer to Figure 5 and Figure 7 As shown, the stent release device, which facilitates effective retraction of the guide head, includes a stent delivery tube and an operating handle. The stent delivery tube includes an outer tube 11, a middle tube 12, and an inner tube 13. The operating handle includes a first handle 21, a second handle 22, and a tail handle 23.

[0043] The outer tube 11, middle tube 12, and inner tube 13 are sequentially fitted from the outside in. The outer tube 11 is connected to the first handle 21, which is a hollow tube, through which the middle tube 12 and inner tube 13 pass. The middle tube 12 is connected to the second handle 22, which is also a hollow tube, through which the inner tube 13 passes. The inner tube 13 is connected to the tailstock 23.

[0044] The inner tube 13 is provided with a guide head 30 at its front end. The guide head 30 is located at the front end of the outer tube 11, and the outer diameter of the guide head 30 is larger than the inner diameter of the outer tube 11.

[0045] The middle tube 12 is slidably connected to the outer tube 11, and the middle tube 12 is slidably connected to the inner tube 13.

[0046] A concealed ring 15 is provided on the outer front end of the central tube 12. The concealed ring 16 facilitates the doctor's observation of whether the stent 10 is close to complete release.

[0047] A booster tube 16 is sleeved between the inner tube 13 and the middle tube 12, which can make the relative sliding between the inner tube 13 and the middle tube 12 smoother.

[0048] The first handle 21 is provided with a fixing button 211 for fixing the position of the first handle 21 relative to the middle tube 12.

[0049] The rear end of the second handle 22 is provided with a receiving groove 221 for accommodating the tail handle 23. The tail handle 23 can be stored in the receiving groove 221, reducing the overall size of the bracket release device.

[0050] The support release device, which facilitates effective retraction of the guide head, has an annular fixing block 14 at its front end of the middle tube 12. The outer diameter of the fixing block 14 is larger than the outer diameter of the middle tube 12 but smaller than the inner diameter of the outer tube 11. The fixing block 14 is fitted onto the outside of the inner tube 13. The front end of the support 10 is fitted between the outer tube 11 and the inner tube 13, and the rear end of the support 10 is fitted between the fixing block 14 and the outer tube 11.

[0051] The length of the fixing block 14 can be 6-10 mm. This ensures that the fixing block 14 can press against the rear end of the bracket 10, and also prevents the friction between the fixing block 14 and the inside of the outer tube 11 from being too large, which would hinder the smooth sliding of the outer tube 11 relative to the middle tube 12.

[0052] Figure 6 and Figure 8 schematically shown Figure 5 The structure shown is designed to facilitate the effective retraction of the guide head during the release of the support.

[0053] refer to Figure 6 and Figure 8 As shown, when the stent delivery tube is inserted into the designated position within the body cavity, keep the second handle 22 stationary, release the fixing button 211 on the first handle 21, and pull the first handle 21 backward, bringing it closer to the second handle 22. The first handle 21 moves the outer tube 11 backward, gradually releasing and opening the front end of the stent 10. If the stent 10 is not fully released before its rear end is completely released, and the release position is not ideal, it needs to be adjusted. Keeping the second handle 22 stationary, the first handle 21 can be moved away from the second handle 22. The second handle 22 moves the front end of the outer tube 11 towards the front end of the stent 10, gradually retracting the front end of the stent 10 completely into the outer tube 11. At this point, tighten the fixing button 211 on the first handle 21, adjust the front end of the stent release tube to the appropriate stent release position again, loosen the fixing button 211 on the first handle 21, and repeat the previous operation. Pull the first handle 21 backward so that the first handle 21 moves towards the second handle 22. The first handle 21 drives the outer tube 11 to move backward, and the front end of the stent 10 gradually releases and opens until the front end of the outer tube 11 is completely separated from the rear end of the stent 10, and the stent 10 is released into place. Finally, tighten the fixing button 211 on the first handle 21 and pull the second handle 22 to withdraw the entire stent release device from the human body cavity.

[0054] While pulling the first handle 21 backward, the tail handle 23 is also pulled backward, causing the tail handle 23 to move away from the second handle 22. The tail handle 23 drives the inner tube 13 and the guide head 30 to move backward. During the release of the bracket 10, the guide head 30 is also gradually moved backward due to the pull of the inner tube 13. Therefore, the guide head 30 remains inside the bracket 10 and gradually moves towards the rear end of the bracket 10. When the front end of the outer tube 11 gradually moves to the rear end of the bracket 10 until the bracket 10 is completely released, the guide head 30 also disengages from the rear end of the bracket 10. The guide head 30 retracts smoothly, avoiding the risk that the guide head 30 cannot retract due to the compression of the bracket 10.

[0055] When it is necessary to move the first handle 21 away from the second handle 22 to retract the bracket 10, it is also necessary to move the tail handle 23 towards the second handle 22 at the same time so that the guide head 30 can be located at the front end of the bracket 10 when the bracket 10 is fully retracted.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A stent releasing device for facilitating the effective retraction of a leading head, characterized in that, The outer tube, the middle tube and the inner tube are sequentially sleeved from outside to inside, and the first handle is connected with the outer tube, the second handle is connected with the middle tube, and the tail handle is connected with the inner tube; The front end of the inner tube is provided with a guide head, the guide head is located at the front end of the outer tube, and the outer diameter of the guide head is greater than the inner diameter of the outer tube; The middle tube is in sliding connection with the outer tube, and the middle tube is in sliding connection with the inner tube; The front end of the support is sleeved between the outer tube and the inner tube, and the rear end of the support is sleeved between the front end of the middle tube and the outer tube.

2. The stent release device for facilitating the effective back- withdrawal of the leading head according to claim 1, characterized in that, The front end of the middle tube is provided with a visible and invisible ring outside.

3. The stent release device for facilitating the effective back- withdrawal of the leading head of claim 1, wherein, A boost tube is sleeved between the inner tube and the middle tube.

4. The stent release device of claim 3, wherein, The boost tube is made of stainless steel.

5. The stent release device of claim 4, wherein the stent release device is configured to be deployed in a blood vessel. The first handle is provided with a fixing button for fixing the position of the first handle relative to the middle tube.

6. The stent release device for facilitating the effective back- withdrawal of a leading head according to claim 1, characterized in that, The rear end of the second handle is provided with a containing groove for containing the tail handle.

7. The stent release device for facilitating the effective back- withdrawal of a leading head according to claim 1, characterized in that, The first handle is a hollow tube, and the middle tube and the inner tube pass through the first handle.

8. The stent release device for facilitating the effective back- withdrawal of a leading head according to claim 1, characterized in that, The second handle is a hollow tube, and the inner tube passes through the second handle.

9. The stent release device of any one of claims 1-8, wherein, The front end of the middle tube is provided with a ring-shaped fixing block, the outer diameter of the fixing block is greater than the outer diameter of the middle tube and less than the inner diameter of the outer tube; The fixing block is sleeved outside the inner tube; The front end of the support is sleeved between the outer tube and the inner tube, and the rear end of the support is sleeved between the fixing block and the outer tube.

10. The stent release device of claim 9, wherein the stent release device is configured to be deployed in a blood vessel. The length of the fixing block is 6-10mm.

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