Caliber-variable sheath tube

Abstract

The utility model provides a sheath tube with a variable caliber, which relates to the technical field of medical instruments and comprises an adjusting mechanism, a connecting mechanism and a tube body mechanism. A first through hole is formed in the adjusting mechanism; the connecting mechanism is provided with a connecting transverse pipe and a connecting inclined pipe, the connecting transverse pipe is provided with a hemostasis structure, a second through hole and a first inflation hole, the hemostasis structure is provided with a center hole, and the second through hole is communicated with the center hole; the connecting inclined pipe is provided with a third through hole, a second inflation hole and a regulation and control structure; a first connecting pipe, a second connecting pipe, a connecting piece and a control handle are arranged on the regulation and control structure; the pipe body mechanism comprises a connecting pipe body, a main pipe body and a folding pipe body, and the connecting pipe body is communicated with the first inflation hole; the main pipe body comprises a fourth through hole and a third inflation hole, the fourth through hole is communicated with the second through hole, and the third inflation hole is communicated with the connecting pipe body; the folding pipe body comprises a folding outer pipe and a central pipe which are communicated with each other, and the outer edge part pipe body of the folding pipe body is configured to be capable of being folded to the outside of the central pipe to form the folding outer pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a sheath tube with a variable caliber. Background Art

[0002] With the development of interventional medical devices and interventional surgical techniques, patients with congenital heart disease can receive minimally invasive interventional treatment. Conventional minimally invasive interventional surgery uses cardiac occluders for occlusion treatment. However, the mainstream occluders on the market are currently made of nickel-titanium alloy materials, which use the superelastic properties of nickel-titanium alloy materials to achieve occlusion treatment at the defect location. Later, with the innovative development of materials, degradable occluders were gradually used.

[0003] During the operation, if the occluder model is not suitable, it is necessary to retrieve the occluder and reselect the occluder model. Whether the occluder can be successfully retrieved into the sheath and safely withdrawn is an extremely important issue. Compared with the nickel-titanium alloy material, the elasticity of the degradable material itself is very weak and the friction resistance is large. The traditional delivery sheath usually only considers the occluder delivery process and ignores the recovery of the occluder, which makes the recovery of the occluder difficult and increases the risk of replacing the occluder. Utility Model Content

[0004] The utility model aims to provide a sheath tube with a variable caliber to solve the problems of great difficulty in recovering the current occluder and high risk in replacing it.

[0005] In order to solve the above problems, the utility model first provides a sheath tube with variable caliber, including: an adjusting mechanism, a connecting mechanism and a tube body mechanism; one end of the adjusting mechanism is detachably connected to one end of the connecting mechanism, and a first through hole is provided inside the adjusting mechanism; the connecting mechanism is provided with a connecting transverse tube and a connecting oblique tube that are connected and form an angle with each other, and the connecting oblique tube is inclined toward the direction close to the adjusting mechanism; a hemostatic structure, a second through hole and a first inflation hole are provided on the connecting transverse tube, a central hole is provided on the hemostatic structure, the second through hole is connected with the central hole, and the first inflation hole is arranged on the outside of the second through hole and close to the direction of the connecting oblique tube; a third through hole, a second inflation hole and a regulating structure are provided on the connecting oblique tube, the third through hole is connected with the second through hole, the second inflation hole is connected with the first inflation hole, and the regulating structure is installed on the connecting oblique tube The oblique tube has one end away from the connecting horizontal tube; the regulating structure is provided with a first connecting tube, a second connecting tube, a connecting piece and a control handle, the first connecting tube is configured to be connected to the third through hole, the second connecting tube is configured to be connected to the second inflation hole, the connecting piece is detachably connected to the connecting oblique tube, and the first connecting tube and the second connecting tube can be opened or closed by adjusting the control handle; the tube body mechanism comprises a connecting tube body, a main tube body and a folding tube body connected in sequence, the connecting tube body is connected to the first inflation hole; the main tube body comprises a fourth through hole and a third inflation hole, the fourth through hole is connected to the second through hole, and the third inflation hole is connected to the connecting tube body; the folding tube body comprises a folding outer tube and a central tube which are connected, and the outer edge part of the folding tube body is configured to be folded to the outside of the central tube to form a folding outer tube.

[0006] With such arrangement, the foldable tube body of the tube body mechanism can be folded or opened, and the first inflation hole, the second inflation hole, the connecting tube body and the third inflation hole on the connecting mechanism are connected. The second inflation hole is opened by adjusting the control handle, and air is inflated inwardly from here into the foldable tube body. After a certain amount of gas is filled, the foldable tube body expands and unfolds, and the foldable outer tube and the central tube are connected as one, the tube diameter becomes larger, and a trumpet-shaped opening is formed. When the occluder needs to be recovered during surgery, the resistance between the foldable tube body becomes smaller, thereby facilitating the recovery of the occluder.

[0007] Furthermore, the hemostatic structure includes a hemostatic groove and a hemostatic pad. The hemostatic pad is installed in the hemostatic groove and cooperates with the hemostatic groove to limit the position. A central hole is opened on the hemostatic pad.

[0008] Furthermore, a compression portion is provided at one end of the hemostatic groove near the second through hole, and the diameter of the compression portion gradually decreases in the direction approaching the second through hole; the hemostatic pad is provided with a compression end, the diameter of the compression end gradually decreases in the direction approaching the second through hole, and the compression end is installed in the compression portion and cooperates with its limit position.

[0009] Furthermore, a pressing column is provided inside the adjusting mechanism, the first through hole passes through the pressing column, and the pressing column abuts against the hemostatic pad.

[0010] Furthermore, a first thread is provided on the inner side of the adjusting mechanism, a second thread is provided on the connecting transverse tube, and the first thread and the second thread are connected.

[0011] Furthermore, first anti-slip protrusions are evenly distributed on the outside of the adjustment mechanism.

[0012] Furthermore, a supporting rib connecting the connecting transverse tube and the connecting oblique tube is provided between the two.

[0013] Furthermore, a plurality of folds are provided on the foldable tube body, and the foldable outer tube can be attached to the outside of the central tube by folding along the folds, and the foldable outer tube and the central tube can be connected by unfolding along the folds.

[0014] Furthermore, a plurality of second anti-slip protrusions are provided on the outside of one end of the connecting transverse tube close to the connecting tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a sheath tube with a variable caliber provided in an embodiment of the utility model;

[0017] Figure 2 A cross-sectional schematic diagram of an adjustment mechanism provided in an embodiment of the utility model;

[0018] Figure 3 A cross-sectional schematic diagram of a hemostatic pad provided by an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the structure of the connection mechanism provided by the embodiment of the utility model;

[0020] Figure 5 A cross-sectional schematic diagram of a connection mechanism provided in an embodiment of the utility model;

[0021] Figure 6 A cross-sectional schematic diagram of a tube body mechanism provided in an embodiment of the utility model;

[0022] Figure 7 A cross-sectional schematic diagram of a folded tube provided in an embodiment of the utility model;

[0023] Figure 8 A schematic diagram of the structure of the control structure provided in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 100 - adjustment mechanism; 110 - first through hole; 120 - pressing column; 130 - first thread; 140 - first anti-slip protrusion;

[0026] 200-connecting mechanism; 210-connecting transverse tube; 211-hemostatic structure; 2111-central hole; 2112-hemostatic groove; 2113-hemostatic pad; 2114-compression part; 2115-compression end; 212-second through hole; 213-first inflation hole; 214-second anti-slip protrusion; 215-second thread;

[0027] 220-connecting oblique tube; 221-third through hole; 222-second inflation hole; 223-regulating structure; 2231-first connecting tube; 2232-second connecting tube; 2233-connecting piece; 2234-control handle; 230-support rib;

[0028] 300 - tube body mechanism; 310 - connecting tube body; 320 - main tube body; 321 - fourth through hole; 322 - third inflation hole; 330 - folded tube body; 331 - folded outer tube; 332 - central tube; 333 - crease. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] In order to solve the problem that the current occluder is difficult to recover and has a high risk of replacement, this embodiment provides a sheath with a variable caliber, such as Figure 1 As shown, it includes: an adjustment mechanism 100, a connection mechanism 200 and a tube body mechanism 300; one end of the adjustment mechanism 100 is detachably connected to one end of the connection mechanism 200, as shown in FIG. Figure 2 As shown, a first through hole 110 is provided inside the adjusting mechanism 100 .

[0031] like Figure 1 As shown, the connecting mechanism 200 is provided with a connecting transverse tube 210 and a connecting oblique tube 220 which are connected and angled with each other, and the connecting oblique tube 220 is inclined toward the direction close to the adjusting mechanism 100; a supporting rib 230 is provided between the connecting transverse tube 210 and the connecting oblique tube 220 to further enhance the stability between the two.

[0032] like Figure 4 and 5As shown, the connecting transverse tube 210 is provided with a hemostatic structure 211, a second through hole 212 and a first inflation hole 213. The hemostatic structure 211 is provided with a central hole 2111, the second through hole 212 is connected to the central hole 2111, and the first inflation hole 213 is arranged outside the second through hole 212 and close to the direction of the connecting oblique tube 220. Preferably, a plurality of second anti-slip protrusions 214 are provided on the outside of one end of the connecting transverse tube 210 close to the connecting tube body 310.

[0033] like Figure 1 , 4 As shown in Figure 5, the connecting oblique tube 220 is provided with a third through hole 221, a second air filling hole 222 and a regulating structure 223. The third through hole 221 is connected to the second through hole 212, the second air filling hole 222 is connected to the first air filling hole 213, and the regulating structure 223 is installed on the end of the connecting oblique tube 220 away from the connecting horizontal tube 210.

[0034] like Figure 8 As shown, the regulating structure 223 is provided with a first connecting tube 2231, a second connecting tube 2232, a connecting piece 2233 and a control handle 2234. The first connecting tube 2231 is configured to be connected to the third through hole 221, the second connecting tube 2232 is configured to be connected to the second inflation hole 222, the connecting piece 2233 is detachably connected to the connecting oblique tube 220, and the first connecting tube 2231 and the second connecting tube 2232 can be opened or closed by adjusting the control handle 2234.

[0035] like Figure 1 and Figure 6 As shown, the tube body mechanism 300 includes a connecting tube body 310, a main tube body 320 and a folding tube body 330 connected in sequence, the connecting tube body 310 is connected to the first inflation hole 213; the main tube body 320 includes a fourth through hole 321 and a third inflation hole 322, the fourth through hole 321 is connected to the second through hole 212, and the third inflation hole 322 is connected to the connecting tube body 310; Figure 7 As shown, the folded tube body 330 includes a folded outer tube 331 and a central tube 332 which are connected to each other. The outer edge portion of the folded tube body 330 is configured to be folded to the outside of the central tube 332 to form the folded outer tube 331 .

[0036] Preferably, in order to facilitate the folding and unfolding of the folding tube body 330, a plurality of folds 333 are provided on the folding tube body 330. Folding along the folds 333 can make the folded outer tube 331 fit onto the outside of the central tube 332, and unfolding along the folds 333 can connect the folded outer tube 331 and the central tube 332.

[0037] Preferably, Figure 1 , 4As shown in FIG. 5 , the hemostatic structure 211 includes a hemostatic groove 2112 and a hemostatic pad 2113 . The hemostatic pad 2113 is installed in the hemostatic groove 2112 and cooperates with the hemostatic groove 2112 to limit the position. A central hole 2111 is formed on the hemostatic pad 2113 .

[0038] like Figure 5 As shown, a compression portion 2114 is provided at one end of the hemostatic groove 2112 close to the second through hole 212, and the diameter of the compression portion 2114 gradually decreases; Figure 3 As shown, the hemostatic pad 2113 is provided with a compression end 2115, the diameter of the compression end 2115 gradually decreases, and the compression end 2115 is installed in the compression part 2114 and cooperates with the limiting part thereof.

[0039] Preferably, Figure 2 As shown, a pressing column 120 is provided inside the adjusting mechanism 100, and the first through hole 110 passes through the pressing column 120. The pressing column 120 abuts against the hemostatic pad 2113. The pressing column 120 presses inward to compress the hemostatic pad 2113, and moves outward to relax the hemostatic pad 2113. In this way, the hemostatic effect of the hemostatic pad 2113 can be controlled by the adjusting mechanism 100.

[0040] Preferably, the adjusting mechanism 100 and the connecting mechanism 200 are threadedly connected, such as Figure 1 and 2 As shown, the inner side of the adjustment mechanism 100 is provided with a first thread 130, and the connecting cross tube 210 is provided with a second thread 215, and the first thread 130 is connected to the second thread 215. In addition, in order to enhance the anti-slip effect of the adjustment mechanism 100 and further precisely control the adjustment mechanism 100, first anti-slip protrusions 140 are evenly distributed on the outside of the adjustment mechanism 100.

[0041] The foldable tube body 330 of the tube body mechanism 300 can be folded or opened. The first inflation hole 213, the second inflation hole 222, the connecting tube body 310 and the third inflation hole 322 on the connecting mechanism 200 are connected. The second inflation hole 222 is opened by adjusting the control handle 2234, and air is inflated inward from here to the foldable tube body 330. After a certain amount of gas is filled, the foldable tube body 330 expands and unfolds, and the foldable outer tube 331 and the central tube 332 are connected as a whole. The tube diameter becomes larger to form a trumpet-shaped opening. When the occluder needs to be recovered during surgery, the resistance between the foldable tube body 330 becomes smaller, thereby facilitating the recovery of the occluder.

[0042] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

[0043] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0044] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sheath tube with a variable caliber, characterized in that: include: Adjusting mechanism, connecting mechanism and pipe body mechanism; One end of the adjusting mechanism is detachably connected to one end of the connecting mechanism, and a first through hole is provided inside the adjusting mechanism; The connecting mechanism is provided with a connecting transverse pipe and a connecting oblique pipe which are connected and form an angle with each other, and the connecting oblique pipe is inclined toward the direction close to the adjusting mechanism; The connecting transverse tube is provided with a hemostatic structure, a second through hole and a first air-filling hole, the hemostatic structure is provided with a central hole, the second through hole is connected to the central hole, and the first air-filling hole is arranged outside the second through hole and close to the direction of the connecting oblique tube; The connecting oblique tube is provided with a third through hole, a second air-filling hole and a regulating structure, the third through hole is connected with the second through hole, the second air-filling hole is connected with the first air-filling hole, and the regulating structure is installed on one end of the connecting oblique tube away from the connecting horizontal tube; The regulating structure is provided with a first connecting tube, a second connecting tube, a connecting piece and a control handle, the first connecting tube is configured to be connected to the third through hole, the second connecting tube is configured to be connected to the second inflation hole, the connecting piece is detachably connected to the connecting oblique tube, and the first connecting tube and the second connecting tube can be opened or closed by adjusting the control handle; The tube body structure includes a connecting tube body, a main tube body and a folding tube body connected in sequence, the connecting tube body is connected to the first inflation hole; the main tube body includes a fourth through hole and a third inflation hole, the fourth through hole is connected to the second through hole, and the third inflation hole is connected to the connecting tube body; the folding tube body includes a folding outer tube and a central tube that are connected, and the outer edge part of the folding tube body is configured to be able to fold to the outside of the central tube to form a folded outer tube.

2. The variable caliber sheath tube according to claim 1, characterized in that: The hemostatic structure comprises a hemostatic groove and a hemostatic pad. The hemostatic pad is installed in the hemostatic groove and cooperates with the hemostatic groove in a limiting manner. The central hole is opened on the hemostatic pad.

3. The variable caliber sheath tube according to claim 2, characterized in that: A compression portion is provided at one end of the hemostatic groove close to the second through hole, and the diameter of the compression portion gradually decreases along the direction close to the second through hole; the hemostatic pad is provided with a compression end, the diameter of the compression end gradually decreases along the direction close to the second through hole, and the compression end is installed in the compression portion and cooperates with its limiting function.

4. The variable caliber sheath tube according to claim 2, characterized in that: A pressing column is provided inside the adjusting mechanism, the first through hole passes through the pressing column, and the pressing column abuts against the hemostatic pad.

5. The variable caliber sheath tube according to claim 1, characterized in that: A first thread is provided on the inner side of the adjusting mechanism, a second thread is provided on the connecting transverse tube, and the first thread and the second thread are connected.

6. The variable caliber sheath tube according to claim 1, characterized in that: The outside of the adjustment mechanism is evenly provided with first anti-slip protrusions.

7. The variable caliber sheath tube according to claim 1, characterized in that: A supporting rib connecting the connecting transverse tube and the connecting oblique tube is provided between the two.

8. The variable caliber sheath tube according to claim 1, characterized in that: The foldable tube body is provided with a plurality of folds. By folding along the folds, the foldable outer tube can be attached to the outside of the central tube. By unfolding along the folds, the foldable outer tube and the central tube can be connected.

9. The variable caliber sheath tube according to claim 1, characterized in that: A plurality of second anti-slip protrusions are arranged on the outside of one end of the connecting transverse tube close to the connecting tube body.

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