A pusher with stent storage device

Abstract

The utility model provides a kind of pusher with support storage device, including support, outer sleeve and push rod, outer sleeve includes tube body and hollow storage shell, the second hollow portion of storage shell is connected with the first hollow portion of tube body;Storage shell is equipped with guide hole;Storage shell is equipped with the push plate for moving the support in the second hollow portion, push plate connects the lever, and lever is worn out guide hole;Push plate is equipped with through-hole;Push rod is worn through the through-hole of push plate after the second hollow portion of storage shell, and then push support in the first hollow portion moves.The utility model solves how to ensure that memory alloy support is not compressed in the storage process before use in the prior art, to avoid the problem of affecting the elasticity of memory alloy support.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a pusher with a stent storage device. Background Technology

[0002] Once the intestinal lumen becomes narrowed or obstructed, symptoms such as abdominal pain, bloating, vomiting, and cessation of gas and defecation may occur due to the obstruction. Therefore, it is necessary to install a stent in the intestine to restore the normal passage function of intestinal contents (chyme and feces).

[0003] The biliary system (intrahepatic bile ducts → extrahepatic bile ducts → common bile duct → duodenum) is the "channel for bile excretion." Once narrowing or obstruction leads to bile stasis, symptoms such as jaundice (yellowing of the skin / eyes), itchy skin, cholestatic hepatitis, and cholangitis (fever, abdominal pain) may occur. In severe cases, it can lead to liver failure. Therefore, stents need to be placed in the biliary tract to restore the smooth function of bile excretion.

[0004] Currently, stents used in the intestines or bile ducts are generally shape memory alloy stents. Before installation, the surgical nurse manually rolls the shape memory alloy stent and inserts it into the outer tube of the pusher. The outer tube is then inserted into the narrowing / obstruction in the patient's intestines or bile duct. The pusher inside the outer tube then pushes the rolled shape memory alloy stent out of the outer tube, allowing it to fall into the narrowing / obstruction in the patient's intestines or bile duct. The rolled shape memory alloy stent unfolds, releases, and supports the narrowing / obstruction, restoring the normal passage function of intestinal contents (chyme, feces) or the smooth excretion of bile.

[0005] During this process, the surgical nurse needs to manually roll the shape memory alloy stent and insert it into the outer tube of the pusher, which makes the stent placement process take longer and the efficiency of stent placement in the patient's body is lower.

[0006] If the shape memory alloy stent is compressed and rolled up before leaving the factory and installed inside the outer tube of the pusher, although the nurse does not need to manually roll up and insert the shape memory alloy stent into the outer tube during use, the period between the pusher leaving the factory and actual use may be long (e.g., 1-2 years). The shape memory alloy stent is in a compressed state inside the outer tube of the pusher for a long time, which may affect the elasticity of the shape memory alloy stent. When the shape memory alloy stent is used, it may not be able to unfold, release and return to its original shape, or in other words, the shape memory alloy stent may not be able to provide good support for the stenosis / obstruction in the intestine or bile duct.

[0007] Therefore, ensuring that the shape memory alloy stent is not compressed during storage before use, thus avoiding affecting its elasticity, has become a technical problem that needs to be solved. Utility Model Content

[0008] The purpose of this invention is to provide a pusher with a support storage device, which mainly solves the problem in the prior art of how to ensure that the memory alloy support is not compressed during storage before use, so as to avoid affecting the elasticity of the memory alloy support.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a pusher with a support storage device, characterized in that: the pusher with a support storage device includes a support, an outer tube and a push rod, the outer tube includes a tube body and a hollow storage shell, and the second hollow part of the storage shell is connected to the first hollow part of the tube body;

[0010] The storage shell is provided with a guide hole; inside the storage shell is a push plate for moving the bracket in the second hollow part, the push plate is connected to a lever, the lever passes through the guide hole; the push plate is provided with a through hole;

[0011] After the push rod passes through the through hole of the push plate in the second hollow part of the storage shell, it pushes the bracket in the first hollow part to move.

[0012] Furthermore, the storage shell and the tube are coaxial, and the cross-sectional area of ​​the storage shell is larger than that of the tube.

[0013] The guide hole is elongated and parallel to the axis of the storage shell.

[0014] The diameter of the through hole is larger than the outer diameter of the push rod, and the outer diameter of the push rod is equal to the inner diameter of the first hollow part of the tube. The push rod pushes the support to move within the first hollow part, closely attached to the inner wall of the tube.

[0015] Furthermore, the shape of the second hollow section in the middle of the storage shell matches the shape of the support after it is unfolded;

[0016] And / or the front section of the storage shell is conical, with a semi-cone angle of 20° to 40°;

[0017] and / or the storage shell is made of a transparent material;

[0018] And / or two levers are symmetrically connected to the push plate, and two guide holes are symmetrically arranged on the storage shell, with the levers and guide holes corresponding one-to-one.

[0019] Furthermore, the pusher with the support storage device also includes a connector, the second end of the outer sleeve is connected to the first fixing head, the second end of the push rod is connected to the second fixing head, the third hollow part inside the connector is sleeved on the push rod, and the first end of the push rod corresponds to the support.

[0020] The first end of the connector is detachably connected to the first fixed head.

[0021] Furthermore, the first fixing head is provided with a first internal thread, and the first end of the connector is provided with a first external thread, and the first internal thread and the first external thread are connected.

[0022] And / or the storage shell is located near the second end of the outer casing.

[0023] Furthermore, the first end of the first fixing head is provided with an inner extension portion extending radially inward, the inner extension portion forming a first opening for the outer sleeve to pass through, and the second end of the outer sleeve is provided with an outer extension portion extending radially outward, the inner extension portion and the outer extension portion forming a snap-fit ​​connection.

[0024] Furthermore, the connector is a T-connector, with the first end of the T-connector being the output end, corresponding to the first fixed head; the second end of the T-connector being the input end, corresponding to the second fixed head; and the third end of the T-connector being the operating end for injecting liquid into the gap between the T-connector and the push rod.

[0025] Furthermore, the interior of the first fixing head is hollow, and the part of the first fixing head near the first end of the first fixing head is the first segment of the first fixing head. The first segment of the first fixing head is in the shape of a hollow frustum, and the small circle of the frustum corresponds to the second end of the outer sleeve.

[0026] The part of the first fixing head near the second end of the first fixing head is the second section of the first fixing head. The second section of the first fixing head is in the shape of a hollow cylinder, and the first internal thread is provided on the inner side of the second section of the first fixing head.

[0027] The first end of the tee connector includes a tapered first section and a cylindrical second section. The shape of the first section matches the shape of the first fixed head. The first external thread is provided on the outer side of the second section.

[0028] Furthermore, a first concave portion is provided on the outer side of the connector; a sealing ring is provided between the outer extension portion and the first end of the tee connector;

[0029] The outer side of the second fixing head is provided with a second concave portion; the outer side of the second section of the first fixing head is provided with a first protruding horizontal strip.

[0030] The push rod is a flexible push rod.

[0031] A pusher with a support storage device includes a support, an outer tube, and a push rod, characterized in that: the outer tube includes a tube body for moving the support in a compressed state, a storage shell for storing the support in an unfolded state, and a push plate for pushing and compressing the support in the unfolded state inside the storage shell into the tube body, and the push rod pushes the support in the compressed state inside the tube body out of the tube body.

[0032] In view of the above technical features, the present invention has the following beneficial effects:

[0033] 1. This utility model discloses a pusher with a stent storage device. The outer tube includes a tube body and a hollow storage shell. The storage shell is used to store the expanded stent. The shape memory alloy stent is stored in the storage shell before use, so it will not be compressed and can be stored for a long time without affecting the elasticity of the shape memory alloy stent. When the pusher with the stent storage device is used, the pusher plate is moved along the guide hole by the lever. The pusher plate pushes the stent forward and gradually compresses it into the tube body of the outer tube. Then, the pusher rod passes through the through hole of the pusher plate and pushes the stent forward in the tube body until the stent is pushed out of the tube body of the outer tube, and the stent is delivered to the location where the stent is to be placed (such as the narrowing / obstruction in the patient's intestine or bile duct), thus completing the stent placement operation. The stent can maintain good elasticity, and the release or expansion of the stent provides good support.

[0034] 2. The present invention provides a pusher with a stent storage device. The connector is a three-way connector. While achieving a detachable connection between the connector, the first fixing head and the second fixing head, the third end of the three-way connector can also be used as the operating end to input liquid into the three-way connector. Utilizing the gap between the three-way connector and the push rod, and the gap between the push rod and the outer sleeve, the liquid flows to the area in the patient's body where the stent is to be installed, thereby realizing the function of adding medicine and / or flushing the area where the stent is to be installed. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a pusher with a support storage device in specific embodiment 1.

[0036] Figure 2 yes Figure 1 Middle AA cross-sectional view (the support is located inside the storage shell).

[0037] Figure 3 This is a schematic diagram (side view) of a pusher with a support storage device in specific embodiment 1.

[0038] Figure 4 yes Figure 2 Schematic diagram of a partial structure of section B (section view).

[0039] Figure 5 This is a schematic diagram of the structure of the first fixing head in specific embodiment 1.

[0040] Figure 6 This is a cross-sectional view of a pusher with a support storage device in specific embodiment 1 (the support is located inside the tube).

[0041] Figure 7 This is a schematic diagram (front view) of a pusher with a support storage device in specific embodiment 2.

[0042] Figure 8This is a schematic diagram (side view) of a pusher with a support storage device in specific embodiment 2.

[0043] Figure 9 This is a schematic diagram (bottom view) of a pusher with a support storage device in specific embodiment 2.

[0044] Figure 10 yes Figure 9 Middle CC section view (the support is located inside the storage shell).

[0045] Figure 11 This is a cross-sectional view of a pusher with a support storage device in specific embodiment 2 (the support is located inside the tube).

[0046] In the diagram: 1. Bracket;

[0047] 2. Outer tube; 21. First end of outer tube; 22. Second end of outer tube; 23. First hollow section; 24. Outer extension; 25. Tube body; 26. Storage shell; 261. Front section of storage shell; 262. Second hollow section; 263. Guide hole; 264. Middle section of storage shell; 27. Push plate; 271. Lever; 272. Through hole;

[0048] 3. Push rod; 31. First end of push rod; 32. Second end of push rod;

[0049] 4. First fixing head; 41. First end of first fixing head; 42. Second end of first fixing head; 43. First internal thread; 44. First section of first fixing head; 45. Second section of first fixing head; 46. Inner extension; 47. First opening; 48. First protruding crossbar; 49. Fourth hollow part;

[0050] 5. Connector / Tee connector; 51. First end of connector / Tee connector; 52. Second end of connector / Tee connector; 53. Third end of Tee connector; 54. Third hollow part; 55. First external thread; 57. First internal recess; 58. First section of Tee connector; 59. Second section of Tee connector;

[0051] 6. Second fixing head; 61. Second concave part. Detailed Implementation

[0052] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0053] See Figures 1 to 6In specific embodiment 1, a pusher with a support storage device is provided, including a support 1, an outer tube 2, and a push rod 3. The outer tube 2 includes a tube body 25 and a hollow storage shell 26. The second hollow portion 262 of the storage shell 26 communicates with the first hollow portion 23 of the tube body 25. The storage shell 26 has a guide hole 263. Inside the storage shell 26, there is a push plate 27 for pushing the support 1 in the second hollow portion 262 to move. The push plate 27 is connected to a lever 271, which passes through the guide hole 263. The push plate 27 has a through hole 272. After the push rod 3 passes through the through hole 272 of the push plate 27 in the second hollow portion 262 of the storage shell 26, it pushes the support 1 in the first hollow portion 23 to move. The tube body 25 and the storage shell 26 of the outer tube 2 enclose the push rod 3, and the storage shell 26 is connected to the tube body 25 of the outer tube 2.

[0054] When the pusher with the support storage device is used, the support 1 is already placed inside the storage shell 26 (i.e., the support 1 is already installed inside the storage shell 26 when the pusher with the support storage device leaves the factory, and it can generally be stored for 2 years). The operator first uses the lever 271 to push the push plate 27. The push plate 27 pushes the support 1 inside the storage shell 26 (at this time, the support 1 is in an unfolded state and fills the inside of the storage shell 26) forward (i.e. towards the first end 21 of the outer tube). The support 1 is gradually compressed during the movement until the support 1 enters the tube body 25. At this time, the support 1 located in the first hollow part 23 of the tube body 25 is in a compressed state. Then the push rod 3 is passed through. The through-hole 272 of the push plate 27 enters the tube body 25 of the outer sleeve 2. The push rod 3 pushes the compressed stent 1 forward until the stent 1 is at the first end 21 of the outer sleeve. At this time, the stent 1 and the push rod 3 are both in the first hollow part 23 of the tube body 25. The outer sleeve 2 is then inserted into the patient's body at the location where the stent is to be installed until the first end 21 of the outer sleeve is near the location where the stent is to be installed. Then the push rod 3 is pushed forward, and the first end 31 of the push rod pushes the stent 1 further forward until the stent 1 is completely removed from the tube body 25 of the outer sleeve 2. The stent 1 expands and returns to its original shape, supporting the location where the stent is to be installed (such as a narrowing / obstruction in the patient's intestine or bile duct). Next, the push rod 3 and the outer sleeve 2 (including the tube body 25 and the storage shell 26) are pulled back to ensure that the stent 1 remains in the patient's body, thus completing the placement operation of the stent 1. When using the pusher with the stent storage device, it is not necessary to roll and compress the stent 1 from the outer tube 2 and store it inside the tube body 25 of the outer tube 2, thus eliminating this step. In this embodiment 1, the pusher plate 27 is simply pushed forward to push the stent 1 into the tube body 25, which realizes the forward movement and synchronous compression of the stent 1 towards the first hollow part 23 of the tube body 25. Then, the pusher rod 3 is passed through the pusher rod 3 through hole 272 and the stent 1 is pushed forward inside the first hollow part 23 of the tube body 25, resulting in higher efficiency. Before using the pusher with the stent storage device, the stent 1 can be stored in the second hollow part 262 of the storage shell 26 for good preservation, cleanliness, and hygiene. The stent 1 inside the storage shell 26 is in an unfolded state and will not be compressed. Even if the storage time is long, the elasticity of the stent 1 will not be affected, preventing the stent 1 from failing to expand and return to its original shape when used. When using the pusher with the stent storage device, as long as the stent 1 is delivered to the location in the patient's body where the stent is to be installed, the stent 1 will unfold using its own elasticity, providing good support.

[0055] Preferably, the storage shell 26 and the tube 25 are coaxial, and the cross-sectional area of ​​the storage shell 26 is larger than that of the tube 25. The storage shell 26 can store the support 1 in the unfolded state. The support 1 moves from the storage shell 26 to the tube 25 under the action of the push plate 27. While moving forward, the support 1 can also be gradually compressed by the storage shell 26 to the compressed state. The compressed support 1 moves into the tube 25 of the outer tube 2.

[0056] The guide hole 263 is elongated and parallel to the axis of the storage shell 26. The user pushes the lever 271 along the guide hole 263, which drives the push plate 27 to move along the guide hole 263. That is, the push plate 27 pushes the bracket 1 forward along the axis of the storage shell 26.

[0057] The diameter of the through hole 272 is larger than the outer diameter of the push rod 3, which ensures that the push rod 3 can pass through the through hole 272 of the push plate 27 and enter the tube body 25. The outer diameter of the push rod 3 is equal to the inner diameter of the first hollow part 23 of the tube body 25. The push rod 3 pushes the support 1 to move in the first hollow part 23 close to the inner wall of the tube body 25, so that the support 1 in a compressed state moves in the first hollow part 23 of the tube body 25.

[0058] The shape of the second hollow portion 262 of the middle section 264 of the storage shell matches the shape of the support 1 after it is unfolded. That is, the shape of the second hollow portion 262 of the middle section 264 of the storage shell is similar to the shape of the support 1 after it is unfolded, or the shape of the second hollow portion 262 of the middle section 264 of the storage shell is proportionally enlarged according to the shape of the support 1 after it is unfolded, or the shape of the second hollow portion 262 of the middle section 264 of the storage shell is larger than the shape of the support 1 after it is unfolded. This is to ensure that the storage shell 26 will not press on the unfolded support 1, and the support 1 can be fully unfolded inside the storage shell 26, retaining the best elasticity.

[0059] Preferably, the front section 261 of the storage shell is conical with a semi-cone angle of 20° to 40°. When the support 1 in the second hollow part 262 of the storage shell 26 moves forward, the support 1 can be gradually compressed by the front section 261 of the storage shell, which helps the compressed support 1 move into the tube body 25 of the outer tube 2 (i.e., from the second hollow part 262 into the first hollow part 23). Then the compressed support 1 moves into the tube body 25 near the first end 21 of the outer tube.

[0060] Preferably, the storage shell 26 is made of transparent material, which makes it easy for the operator to observe the condition of the support 1 inside the storage shell 26 from the outside, such as whether the storage shell 26 has the support 1 or whether the support 1 is in good condition (e.g., whether it is in a fully extended state). The operator can quickly select qualified pushers for use.

[0061] Preferably, two levers 271 are symmetrically connected to the push plate 27, and two guide holes 263 are symmetrically arranged on the storage shell 26. The levers 271 and the guide holes 263 correspond one-to-one, which makes it convenient for the user to push the levers 271 simultaneously from both sides of the storage shell 26, so as to help the push plate 27 move smoothly along the guide holes 263, and help the bracket 1 inside the storage shell 26 move forward more smoothly. The bracket 1 is subjected to more uniform force during the movement, and can be gradually and more smoothly compressed by the front section 261 of the storage shell, so as to avoid damage to the bracket 1.

[0062] Preferably, the storage shell 26 is located near the second end 22 of the outer tube, so that the longest tube body 25 can be preserved as much as possible, and the length of the tube body 25 extending into the esophagus is guaranteed.

[0063] The pusher with a stent storage device also includes a connector 5, the second end 22 of the outer tube is connected to the first fixing head 4 (e.g., by glue), the second end 32 of the push rod is connected to the second fixing head 6 (e.g., by glue), the third hollow part 54 inside the connector 5 is sleeved on the push rod 3, and the first end 31 of the push rod corresponds to the stent 1; the push rod 3 is used to push the stent 1 out of the outer tube 2, so that the stent 1 expands and unfolds in the patient's body at the site where the stent is to be installed to support the site where the stent is to be installed;

[0064] The first end 51 of the connector is detachably connected to the first fixing head 4. Before the stent 1 is moved to the location where the stent is to be installed, the first end 51 of the connector is connected to the first fixing head 4, and the second fixing head 6 is temporarily not connected to the connector 5. This makes it easier for the user to hold the connector 5 with one hand and the second fixing head 6 with the other hand to push the stent 1 in the storage shell 26 forward (i.e. towards the first end 21 of the outer tube). The stent 1 is slowly compressed by the front section 261 of the storage shell through the tapered design of the front section 261 of the storage shell. The compressed stent 1 is moved into the first hollow part 23 of the tube body 25 of the outer tube 2 (preferably near the first hollow part 23 of the first end 21 of the outer tube). At this time, the stent 1 is in a compressed state. Then, the tube body 25 of the outer tube 2 containing the compressed stent 1 and the push rod 3 are precisely controlled to move synchronously in the patient's body until the first end 21 of the outer tube is delivered to the vicinity of the location where the stent is to be installed in the patient's body. The user then holds the connector 5 still with one hand, while using the other hand to move the second fixing head 6 forward to control the precision of the push rod 3's movement. This ensures that the support 1, which has been removed from the outer tube 23, is aligned with the location where the support will be installed and expands, allowing the expanded support 1 to fully support the location where the support will be installed. At this point, the second end 52 of the connector and the second fixing head 6 can be connected and fixed, achieving a relatively fixed position between the outer tube 2 and the push rod 3, meaning that the push rod 3 cannot move inside the outer tube 2. Once the support 1 has been placed, the first fixing head 4, the second fixing head 6, and the connector 5, along with the outer tube 2 and the push rod 3 inside, are moved backward synchronously, allowing the outer tube 2 and the push rod 3 to be withdrawn from the patient's body, improving the ease of operation.

[0065] In this embodiment 1, the first fixing head 4 is provided with a first internal thread 43, and the first end 51 of the connector is provided with a first external thread 55. The first internal thread 43 and the first external thread 55 are connected, that is, the first internal thread 43 and the first external thread 55 realize the detachable connection between the first fixing head 4 and the connector 5.

[0066] The outer side of the connector 5 is provided with a first concave portion 57, which makes it easy for the user to grip the connector 5 and apply force to the connector 5, thereby indirectly controlling the back and forth movement of the outer sleeve 2.

[0067] The first end 41 of the first fixing head is provided with an inner extension 46 extending radially inward, the inner extension 46 forming a first opening 47 for the outer sleeve 2 to pass through, and the second end 22 of the outer sleeve is provided with an outer extension 24 extending radially outward, the inner extension 46 and the outer extension 24 forming a snap-fit.

[0068] When the outer tube 2 is inserted into the first opening 47, the inner extension 46 and the outer extension 24 abut against each other, connecting the first fixing head 4 and the connecting head 5. For example, tightening the first internal thread 43 on the inner side wall of the first fixing head 4 and the first external thread 55 on the outer side of the connecting head 5, the first end of the connector and the inner extension 46 together clamp the outer extension 24, thereby achieving the connection and fixation between the first fixing head 4, the connecting head 5 and the outer tube 2.

[0069] The outer side of the second section 45 of the first fixing head has a first protruding horizontal bar 48 to increase the friction force for the operator to rotate the first fixing head 4; the second fixing head 6 is a hollow cylinder, and the push rod 3 passes through the hollow part of the second fixing head 6. The push rod 3 and the hollow part of the second fixing head 6 are connected, for example, by using glue to fix them together. The outer side of the second fixing head 6 has a second concave part 61, which makes it easier for the user to grip the second fixing head 6 and apply force to the second fixing head 6, indirectly controlling the back and forth movement of the push rod 3.

[0070] The push rod 3 is a flexible push rod 3. For example, the push rod 3 is made of an elastomer material, such as silicone rubber. When it needs to come into contact with the human body or operate inside the body / cavity, such as in this embodiment 1, the tube body 25 of the outer tube 2 containing the support 1 and the push rod 3 is inserted into the patient's body. The flexible push rod 3 can avoid damage to human tissue and conform to the bending shape of the physiological structure.

[0071] See Figures 7 to 11 In specific embodiment 2, this embodiment 2 provides a pusher with a support storage device. The difference between this embodiment 1 and embodiment 2 is that the connector 5 is a three-way connector 5, the first end 51 of the three-way connector is the output end, the output end corresponds to the first fixed head 4, the second end 52 of the three-way connector is the input end, the input end corresponds to the second fixed head 6, and the third end 53 of the three-way connector is the operation end for injecting liquid into the gap between the three-way connector 5 and the push rod 3.

[0072] In this embodiment 2, the first end 51 and the second end of the three-way connector are connected to form a hollow channel (i.e., the third hollow part 54) through which the push rod 3 passes. The third end 53 of the three-way connector is connected to the hollow channel. There is a gap between the push rod 3 and the hollow channel, which facilitates the movement of the push rod 3 within the hollow channel of the three-way connector 5. When the stent 1 is placed, the outer tube 2 is inserted into the patient's body. Liquid can also be injected into the gap between the three-way connector 5 and the push rod 34 using the third end 53 of the three-way connector (i.e., the operating end). The liquid flows into the patient's body through the gap between the push rod 3 and the outer tube 2, realizing the operation of adding medicine or flushing at the site where the stent is to be installed.

[0073] A sealing ring is provided between the outer extension 24 and the first end 51 of the tee connector. When the first internal thread 43 on the inner sidewall of the first fixing head 4 and the first external thread 55 on the outer side of the connector 5 are tightened, the first end of the tee connector and the inner extension 46 together clamp the outer extension 24 and the sealing ring. This achieves both the connection and fixation between the first fixing head 4, the tee connector 5 and the outer sleeve 2, and the sealing between the outer sleeve 2 and the tee connector 5. This ensures that when liquid is injected into the gap between the tee connector 5 and the push rod 3 using the third end 53 of the tee connector (i.e., the operating end), the liquid will not penetrate or leak into the gap between the tee connector 5 and the first fixing head 4. This ensures that the liquid flows smoothly into the gap between the push rod 3 and the outer sleeve 2 until it reaches the patient's body where the stent is to be installed, avoiding unnecessary liquid loss.

[0074] The interior of the first fixing head 4 is hollow. The part of the first fixing head 4 near the first end 41 of the first fixing head is the first section 44 of the first fixing head. The first section 44 of the first fixing head is in the shape of a hollow frustum, and the small circle of the frustum corresponds to the second end 22 of the outer sleeve.

[0075] The part of the first fixing head 4 near the second end 42 of the first fixing head is the second section 45 of the first fixing head. The second section 45 of the first fixing head is in the shape of a hollow cylinder, and the first internal thread 43 is provided on the inner side of the second section 45 of the first fixing head.

[0076] The first end 51 of the tee connector includes a tapered first section 58 and a cylindrical second section 59. The shape of the first section 58 matches the shape of the first section 44 of the first fixing head. The first external thread 55 is provided on the outer side of the second section 59. When the first end 51 of the tee connector is inserted into the fourth hollow part 49 inside the first fixing head 4, as the first internal thread 43 on the inner sidewall of the first fixing head 4 and the first external thread 55 on the outer side of the second section 59 of the tee connector are tightened, the tighter the first end of the tee connector and the inner extension 46 clamp the outer extension 24 and the sealing ring more tightly, resulting in a better sealing effect. During this process, the first section 44 of the first fixed head, which is hollow and shaped like a frustum, guides the first end of the tee connector, ensuring that the first end of the tee connector is aligned with the sealing ring and the outer extension 24. This facilitates the axial alignment of the first end of the tee connector and the inner extension 46, helping the first end of the tee connector and the inner extension 46 to achieve a better clamping effect on the outer extension 24 and the sealing ring.

[0077] In this embodiment 2, the appendix Figure 10 See the enlarged structure of part B in the image. Figure 4 As shown.

[0078] In specific embodiment 3, a pusher with a support storage device is provided, including a support 1, an outer tube 2, and a push rod 3. The outer tube 2 includes a tube body 25 and a hollow storage shell 26. The second hollow portion 262 of the storage shell 26 communicates with the first hollow portion 23 of the tube body 25. The storage shell 26 has a guide hole 263. Inside the storage shell 26, there is a push plate 27 for pushing the support 1 in the second hollow portion 262 to move. The push plate 27 is connected to a lever 271, which passes through the guide hole 263. The push plate 27 has a through hole 272. After the push rod 3 passes through the through hole 272 of the push plate 27 in the second hollow portion 262 of the storage shell 26, it pushes the support 1 in the first hollow portion 23 to move. The tube body 25 and the storage shell 26 of the outer tube 2 enclose the push rod 3, and the storage shell 26 is connected to the tube body 25 of the outer tube 2.

[0079] Even without the connector 5, the first fixing head 4, and the second fixing head 6, the storage function of the storage shell 26 for the stent 1 in Embodiment 1 can still be achieved. The stent 1 can be stored in the storage shell 26 in an expanded state without being compressed. This avoids the stent 1 being unable to expand and return to its original state when used due to prolonged compression (i.e., the elasticity of the stent 1 is affected), which in turn affects the support of the stent 1 for the patient's body at the site where the stent is to be installed.

[0080] Specific embodiment 4 provides a pusher with a stent storage device, including a stent 1, an outer tube 2, and a push rod 3. The outer tube 2 includes a tube body 25 for moving the stent 1 in a compressed state, a storage shell 26 for storing the stent 1 in an expanded state, and a push plate 27 for pushing and compressing the expanded stent 1 within the storage shell 26 into the tube body 25. The push rod 3 pushes the compressed stent 1 out of the tube body 25. The storage shell 26 stores the stent 1 in an expanded state, preventing compression and avoiding the stent 1 from failing to expand and return to its original shape due to prolonged compression (i.e., affecting the elasticity of the stent 1), thus impacting its support at the site where the stent is to be implanted in the patient. When using the pusher with the stent storage device, the stent 1 in its unfolded state is first pushed and compressed into the tube 25 by the push plate 27. Then, the push rod 3 is used to push the compressed stent 1 in the tube 25 to the first end 21 of the outer tube. Next, the outer tube 2, along with the stent 1 and push rod 3, are inserted into the patient's body and moved to the vicinity of the stent placement site. Then, the push rod 3 is pushed forward, and the first end 31 of the push rod pushes the stent 1 further forward until the stent 1 is completely removed from the tube 25 of the outer tube 2. The stent 1 expands and returns to its original shape, supporting the site to be placed (such as a narrowing / obstruction in the patient's intestines or bile duct). Next, the push rod 3 and the outer tube 2 (including the tube 25 and the storage shell 26) are pulled back to ensure that the stent 1 remains in the patient's body, thus completing the stent placement operation.

[0081] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A pusher with a support storage device, characterized in that: The pusher with a support storage device includes a support (1), an outer tube (2) and a push rod (3). The outer tube (2) includes a tube body (25) and a hollow storage shell (26). The second hollow part (262) of the storage shell (26) is connected to the first hollow part (23) of the tube body (25). The storage shell (26) is provided with a guide hole (263); the storage shell (26) is provided with a push plate (27) for pushing the support (1) in the second hollow part (262) to move, the push plate (27) is connected to a lever (271), the lever (271) passes through the guide hole (263); the push plate (27) is provided with a through hole (272). After the push rod (3) passes through the through hole (272) of the push plate (27) in the second hollow part (262) of the storage shell (26), it pushes the bracket (1) in the first hollow part (23) to move.

2. The pusher with a support storage device according to claim 1, characterized in that: The storage shell (26) and the tube (25) are coaxial, and the cross-sectional area of ​​the storage shell (26) is larger than that of the tube (25). The guide hole (263) is elongated and parallel to the axis of the storage shell (26); The diameter of the through hole (272) is greater than the outer diameter of the push rod (3). The outer diameter of the push rod (3) is equal to the inner diameter of the first hollow part (23) of the tube body (25). The push rod (3) pushes the support (1) to move in the first hollow part (23) close to the inner wall of the tube body (25).

3. The pusher with a support storage device according to claim 2, characterized in that: The shape of the second hollow part (262) of the middle section (264) of the storage shell matches the shape of the support (1) after it is unfolded; And / or the front section (261) of the storage shell is conical with a semi-cone angle of 20° to 40°; And / or the storage shell (26) is made of a transparent material; Two levers (271) are symmetrically connected to the push plate (27), and two guide holes (263) are symmetrically arranged on the storage shell (26). The levers (271) and guide holes (263) correspond one-to-one.

4. A pusher with a support storage device according to claim 1, 2, or 3, characterized in that: The pusher with a support storage device also includes a connector (5), the second end (22) of the outer sleeve is connected to the first fixing head (4), the second end (32) of the push rod is connected to the second fixing head (6), the third hollow part (54) inside the connector (5) is sleeved on the push rod (3), and the first end (31) of the push rod corresponds to the support (1). The first end (51) of the connector is detachably connected to the first fixing head (4).

5. A pusher with a support storage device according to claim 4, characterized in that: The first fixing head (4) is provided with a first internal thread (43), and the first end (51) of the connector is provided with a first external thread (55). The first internal thread (43) and the first external thread (55) are connected. And / or storage shell (26) near the second end (22) of the outer tube.

6. A pusher with a support storage device according to claim 5, characterized in that: The first end (41) of the first fixing head is provided with an inner extension (46) extending radially inward, the inner extension (46) forming a first opening (47) for the outer tube (2) to pass through, and the second end (22) of the outer tube is provided with an outer extension (24) extending radially outward, the inner extension (46) and the outer extension (24) forming a snap-fit.

7. A pusher with a support storage device according to claim 6, characterized in that: The connector (5) is a three-way connector (5). The first end (51) of the three-way connector is the output end, which corresponds to the first fixed head (4). The second end (52) of the three-way connector is the input end, which corresponds to the second fixed head (6). The third end (53) of the three-way connector is the operating end for injecting liquid into the gap between the three-way connector (5) and the push rod (3).

8. A pusher with a support storage device according to claim 7, characterized in that: The first fixing head (4) is hollow inside. The part of the first fixing head (4) near the first end (41) of the first fixing head is the first section (44) of the first fixing head. The first section (44) of the first fixing head is hollow in the shape of a frustum, and the small circle of the frustum corresponds to the second end (22) of the outer tube. The part of the first fixing head (4) near the second end (42) of the first fixing head is the second section (45) of the first fixing head. The second section (45) of the first fixing head is in the shape of a hollow cylinder, and the first internal thread (43) is provided on the inner side of the second section (45) of the first fixing head. The first end (51) of the tee connector includes a tapered first section (58) and a cylindrical second section (59). The shape of the first section (58) matches the shape of the first fixed head first section (44), and the first external thread (55) is provided on the outer side of the second section (59).

9. A pusher with a support storage device according to claim 8, characterized in that: The outer side of the connector (5) is provided with a first inner recess (57); a sealing ring is provided between the outer extension (24) and the first end (51) of the tee connector; The outer side of the second fixing head (6) is provided with a second inner recess (61); The outer side of the second section (45) of the first fixing head is provided with a first protruding horizontal bar (48); The push rod (3) is a flexible push rod (3).

10. A pusher with a support storage device, comprising a support (1), an outer tube (2), and a push rod (3), characterized in that: The outer tube (2) includes a tube body (25) for moving the compressed support (1), a storage shell (26) for storing the deployed support (1), and a push plate (27) for pushing and compressing the deployed support (1) in the storage shell (26) into the tube body (25). The push rod (3) pushes the compressed support (1) out of the tube body (25).

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