Variable-caliber sheath tube

Abstract

A variable-caliber sheath tube, comprising: an adjustment mechanism (100), a connection mechanism (200), and a tube body mechanism (300). A first through hole (110) is arranged inside the adjustment mechanism (100). The connection mechanism (200) is provided with a connection transverse tube (210) and a connection inclined tube (220). A hemostasis structure (211), a second through hole (212), and a first inflation hole (213) are arranged on the connection transverse tube (210). A central hole (2111) is formed in the hemostasis structure (211). The second through hole (212) is in communication with the central hole (2111). A third through hole (221), a second inflation hole (222), and a regulatory structure (223) are arranged on the connection inclined tube (220). A first connection tube (2231), a second connection tube (2232), a connection member (2233), and a control handle (2234) are arranged on the regulatory structure (223). The tube body mechanism (300) comprises a connection tube body (310), a main tube body (320), and a folded tube body (330). The connection tube body (310) is in communication with the first inflation hole (213). The main tube body (320) comprises a fourth through hole (321) and a third inflation hole (322). The fourth through hole (321) is in communication with the second through hole (212), and the third inflation hole (322) is in communication with the connection tube body (310). The folded tube body (330) comprises a folded outer tube (331) and a central tube (332) that communicate. A portion of the tube body at the outer edge of the folded tube body (330) is configured to be capable of being folded to the exterior of the central tube (332) to form the folded outer tube (331).

Description

Variable diameter sheath TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a variable diameter sheath. BACKGROUND

[0002] With the development of interventional medical devices and interventional surgical techniques, patients with congenital heart disease can be treated by minimally invasive intervention. Conventional minimally invasive interventional surgery uses a heart occluder for occlusion therapy. However, the mainstream occluder on the market is made of nickel-titanium alloy material, which uses the super-elasticity of the nickel-titanium alloy material to achieve occlusion therapy at the defect site. Then, with the development of innovative materials, degradable occluders have been gradually applied.

[0003] During the operation, if the occluder size is not suitable, the occluder needs to be recovered and the occluder size needs to be selected again. Whether the occluder can be smoothly recovered into the sheath and safely removed is a very important problem. Since the elasticity of the degradable material itself is much weaker than that of the nickel-titanium alloy material, the frictional resistance is large, and the traditional delivery sheath usually only considers the delivery process of the occluder, but ignores the recovery of the occluder, making the recovery of the occluder difficult and increasing the risk of replacing the occluder.

[0004] SUMMARY

[0005] The present application aims to provide a variable diameter sheath to solve the problem of high difficulty in recovering the occluder and high risk of replacement.

[0006] To solve the above problems, the present application first provides a variable caliber sheath, comprising: an adjusting mechanism, a connecting mechanism and a tube mechanism; one end of the adjusting mechanism is detachably connected with one end of the connecting mechanism, and the adjusting mechanism is internally provided with a first through hole; the connecting mechanism is provided with a connecting horizontal pipe and a connecting inclined pipe connected with each other and forming an included angle, and the connecting inclined pipe is inclined towards the adjusting mechanism; the connecting horizontal pipe is provided with a hemostasis structure, a second through hole and a first inflation hole, the hemostasis structure is provided with a central hole, the second through hole is in communication with the central hole, and the first inflation hole is arranged outside the second through hole and close to the direction of the connecting inclined pipe; the connecting inclined pipe is provided with a third through hole, a second inflation hole and a control structure, the third through hole is in communication with the second through hole, the second inflation hole is in communication with the first inflation hole, and the control structure is installed on one end of the connecting inclined pipe away from the connecting horizontal pipe; the control structure is provided with a first connecting pipe, a second connecting pipe, a connecting piece and a control handle, the first connecting pipe is configured to be in communication with the third through hole, the second connecting pipe is configured to be in communication with the second inflation hole, the connecting piece is detachably connected with the connecting inclined pipe, and the first connecting pipe and the second connecting pipe can be opened or closed by adjusting the control handle; the tube mechanism comprises a connecting tube body, a main tube body and a folding tube body connected in sequence, and the connecting tube body is in communication with the first inflation hole; the main tube body comprises a fourth through hole and a third inflation hole, the fourth through hole is in communication with the second through hole, and the third inflation hole is in communication with the connecting tube body; the folding tube body comprises a folding outer tube and a central tube in communication, and the outer edge part of the folding tube body is configured to be folded to the outside of the central tube to form the folding outer tube.

[0007] In this way, the folding tube body of the tube mechanism can be folded or opened, the first inflation hole, the second inflation hole, the connecting tube body and the third inflation hole on the connecting mechanism are in communication, the second inflation hole is opened by adjusting the control handle, and the inflation is conducted inward from here to the folding tube body, the folding tube body expands after the gas is filled to a certain amount, the folding outer tube and the central tube are connected into one body, the tube diameter becomes larger, a horn-shaped opening is formed, and the resistance between the folding tube body is smaller when the occluder needs to be recovered during the operation, so that the occluder is conveniently recovered.

[0008] Further, the hemostasis structure comprises a hemostasis groove and a hemostasis pad, the hemostasis pad is installed in the hemostasis groove and limitedly matched therewith, and the hemostasis pad is provided with a central hole.

[0009] Further, one end of the hemostasis groove close to the second through hole is provided with a compression part, the diameter of the compression part gradually decreases along the direction close to the second through hole; the hemostasis 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 part and limitedly matched therewith.

[0010] Further, the adjusting mechanism is internally provided with a pressing column, the first through hole penetrates the pressing column, and the pressing column abuts against the hemostasis pad.

[0011] Further, the inner side of the adjusting mechanism is provided with a first thread, the connecting cross pipe is provided with a second thread, and the first thread and the second thread are connected.

[0012] Further, the outer side of the adjusting mechanism is uniformly provided with first anti-skid protrusions.

[0013] Further, the connecting cross pipe and the connecting inclined pipe are provided with a support rib connected therewith.

[0014] Further, the folding pipe body is provided with a plurality of folding lines, and the folding outer pipe can be attached to the outer side of the central pipe by folding along the folding lines, and the folding outer pipe and the central pipe can be communicated by unfolding along the folding lines.

[0015] Further, the connecting cross pipe is provided with a plurality of second anti-skid protrusions on the outer side of the end close to the connecting pipe body. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0017] Fig. 1 is a structural schematic view of the variable caliber sheath provided by the embodiment of the present application;

[0018] Fig. 2 is a sectional schematic view of the adjusting mechanism provided by the embodiment of the present application;

[0019] Fig. 3 is a sectional schematic view of the hemostatic pad provided by the embodiment of the present application;

[0020] Fig. 4 is a structural schematic view of the connecting mechanism provided by the embodiment of the present application;

[0021] Fig. 5 is a sectional schematic view of the connecting mechanism provided by the embodiment of the present application;

[0022] Fig. 6 is a sectional schematic view of the pipe body mechanism provided by the embodiment of the present application;

[0023] Fig. 7 is a sectional schematic view of the folding pipe body provided by the embodiment of the present application;

[0024] Fig. 8 is a structural schematic view of the regulating structure provided by the embodiment of the present application.

[0025] Explanation of reference signs: 100-adjusting mechanism; 110-first through hole; 120-pressing column; 130-first thread; 140-first anti-skid protrusion; 200-connecting mechanism; 210-connecting cross pipe; 211-hemostasis structure; 2111-central hole; 2112-hemostasis groove; 2113-hemostasis pad; 2114-compression part; 2115-compression end; 212-second through hole; 213-first inflation hole; 214-second anti-skid protrusion; 215-second thread; 220-connecting inclined pipe; 221-third through hole; 222-second inflation hole; 223-regulating structure; 2231-first connecting pipe; 2232-second connecting pipe; 2233-connector; 2234-control handle; 230-supporting rib; 300-tube mechanism; 310-connecting tube; 320-main tube; 321-fourth through hole; 322-third inflation hole; 330-folded tube; 331-folded outer tube; 332-central tube; 333-fold. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0027] In order to solve the problem of high risk of replacement and difficulty in recycling the occluder at present, the embodiment provides a variable caliber sheath, as shown in FIG. 1, which comprises an adjusting mechanism 100, a connecting mechanism 200 and a tube mechanism 300; one end of the adjusting mechanism 100 is detachably connected with one end of the connecting mechanism 200, as shown in FIG. 2, and the adjusting mechanism 100 is internally provided with a first through hole 110.

[0028] As shown in FIG. 1, the connecting mechanism 200 is provided with a connecting cross pipe 210 and a connecting inclined pipe 220 which are connected and mutually form an included angle, and the connecting inclined pipe 220 is inclined towards the direction close to the adjusting mechanism 100; the connecting cross pipe 210 and the connecting inclined pipe 220 are provided with a supporting rib 230 connected with both of them, further strengthening the stability between both of them.

[0029] As shown in FIGS. 4 and 5, the connecting cross pipe 210 is provided with a hemostasis structure 211, a second through hole 212 and a first inflation hole 213, the hemostasis structure 211 is provided with a central hole 2111, the second through hole 212 is in communication with the central hole 2111, and the first inflation hole 213 is arranged on the outside of the second through hole 212 and close to the direction of the connecting inclined pipe 220. Preferably, the outer part of one end of the connecting cross pipe 210 close to the connecting tube 310 is provided with a plurality of second anti-skid protrusions 214.

[0030] As shown in FIG. 1, 4 and 5, the connecting inclined pipe 220 is provided with a third through hole 221, a second inflation hole 222 and a regulating structure 223, the third through hole 221 is communicated with the second through hole 212, the second inflation hole 222 is communicated with the first inflation hole 213, and the regulating structure 223 is installed on the connecting inclined pipe 220 and away from the connecting horizontal pipe 210.

[0031] As shown in FIG. 8, the regulating structure 223 is provided with a first connecting pipe 2231, a second connecting pipe 2232, a connecting piece 2233 and a control handle 2234, the first connecting pipe 2231 is configured to be communicated with the third through hole 221, the second connecting pipe 2232 is configured to be communicated with the second inflation hole 222, the connecting piece 2233 is detachably connected with the connecting inclined pipe 220, and the first connecting pipe 2231 and the second connecting pipe 2232 can be opened or closed by adjusting the control handle 2234.

[0032] As shown in FIG. 1 and FIG. 6, the pipe body mechanism 300 comprises a connecting pipe body 310, a main pipe body 320 and a folding pipe body 330 connected in sequence, the connecting pipe body 310 is communicated with the first inflation hole 213; the main pipe body 320 comprises a fourth through hole 321 and a third inflation hole 322, the fourth through hole 321 is communicated with the second through hole 212, and the third inflation hole 322 is communicated with the connecting pipe body 310; as shown in FIG. 7, the folding pipe body 330 comprises a folding outer pipe 331 and a center pipe 332 communicated with each other, and the outer edge part of the folding pipe body 330 is configured to be folded to the outside of the center pipe 332 to form the folding outer pipe 331.

[0033] Preferably, in order to facilitate the folding and unfolding of the folding pipe body 330, a plurality of creases 333 are arranged on the folding pipe body 330, and the folding outer pipe 331 can be attached to the outside of the center pipe 332 by folding along the creases 333, and the folding outer pipe 331 and the center pipe 332 can be communicated by unfolding along the creases 333.

[0034] Preferably, as shown in FIG. 1, 4 and 5, the hemostasis structure 211 comprises a hemostasis groove 2112 and a hemostasis pad 2113, the hemostasis pad 2113 is installed in the hemostasis groove 2112 and limitedly matched therewith, and a center hole 2111 is arranged on the hemostasis pad 2113.

[0035] As shown in FIG. 5, the hemostasis groove 2112 is provided with a compression part 2114 near one end of the second through hole 212, and the diameter of the compression part 2114 gradually decreases; as shown in FIG. 3, the hemostasis 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 limitedly matched therewith.

[0036] Preferably, as shown in Figure 2, the adjusting mechanism 100 is internally provided with a pressing column 120, the first through hole 110 penetrates the pressing column 120, the pressing column 120 abuts against the hemostatic pad 2113, the pressing column 120 extrudes inward to compress the hemostatic pad 2113, and the pressing column 120 moves outward to relax the hemostatic pad 2113, so that the adjusting mechanism 100 can control the hemostatic effect of the hemostatic pad 2113.

[0037] Preferably, the adjusting mechanism 100 is threadedly connected with the connecting mechanism 200, as shown in Figures 1 and 2, the inner side of the adjusting mechanism 100 is provided with a first thread 130, the connecting cross pipe 210 is provided with a second thread 215, and the first thread 130 and the second thread 215 are connected. In addition, in order to enhance the anti-skid effect of the adjusting mechanism 100 and further accurately control the adjusting mechanism 100, the outer side of the adjusting mechanism 100 is uniformly provided with first anti-skid protrusions 140.

[0038] The folding pipe body 330 of the pipe body mechanism 300 can be folded or opened, the first inflation hole 213, the second inflation hole 222, the connecting pipe body 310 and the third inflation hole 322 on the connecting mechanism 200 are communicated, the second inflation hole 222 is opened by adjusting the control handle 2234, air is inflated from the second inflation hole 222 into the folding pipe body 330, the folding pipe body 330 expands and unfolds after a certain amount of air is filled, the folding outer pipe 331 and the center pipe 332 are communicated and integrated, the pipe diameter becomes larger, a horn-shaped opening is formed, and the resistance between the folding pipe body 330 and the occluder is smaller when the occluder needs to be recovered during the operation, so that the occluder is conveniently recovered.

[0039] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and the protection scope of the present application should be defined by the scope defined in the claims.

[0040] Finally, it should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0041] The various embodiments described in this specification are intended to be illustrative only and in no way limit the scope of the application. Changes and modifications can be made by those skilled in the art, which employ the principles of the application, without departing from the scope thereof. Accordingly, the application is not limited to the embodiments described herein, but is intended to cover any and all alternatives and equivalents thereof that fall within the scope of the claims.

[0042] The foregoing description of the disclosed embodiments enables a person skilled in the art to carry out or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A changeable caliber sheath, characterized by, The utility model relates to a kind of adjustable hemostatic device, including: 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 horizontal pipe and a connecting inclined pipe connected and mutually angled, and the connecting inclined pipe is inclined towards the adjusting mechanism. A hemostatic structure, a second through hole and a first inflation hole are provided on the connecting horizontal pipe, a central hole is provided on the hemostatic structure, the second through hole is communicated with the central hole, and the first inflation hole is arranged outside the second through hole and close to the direction of the connecting inclined pipe. A third through hole, a second inflation hole and a control structure are provided on the connecting inclined pipe, the third through hole is communicated with the second through hole, the second inflation hole is communicated with the first inflation hole, and the control structure is installed on one end of the connecting inclined pipe away from the connecting horizontal pipe. A first connecting pipe, a second connecting pipe, a connecting piece and a control handle are provided on the control structure, the first connecting pipe is configured to be communicated with the third through hole, the second connecting pipe is configured to be communicated with the second inflation hole, the connecting piece is detachably connected with the connecting inclined pipe, and the first connecting pipe and the second connecting pipe can be opened or closed by adjusting the control handle. The pipe body mechanism includes a connecting pipe body, a main pipe body and a folding pipe body connected in sequence, the connecting pipe body is communicated with the first inflation hole, the main pipe body includes 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, and the folding pipe body includes a folding outer pipe and a central pipe communicated, and the outer edge part of the folding pipe body is configured to be folded to the outside of the central pipe to form the folding outer pipe.

2. The variable gauge sheath of claim 1, wherein, The hemostatic structure includes a hemostatic groove and a hemostatic pad, the hemostatic pad is installed in the hemostatic groove and limitedly matched therewith, and the central hole is formed in the hemostatic pad.

3. The variable gauge sheath of claim 2, wherein, One end of the hemostatic groove close to the second through hole is provided with a compression part, the diameter of the compression part 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 part and limitedly matched therewith.

4. The variable gauge sheath of claim 2, wherein, A pressing column is provided inside the adjusting mechanism, the first through hole penetrates the pressing column, and the pressing column abuts against the hemostatic pad.

5. The variable gauge sheath of claim 1, wherein, A first thread is provided on the inner side of the adjusting mechanism, a second thread is provided on the connecting horizontal pipe, and the first thread and the second thread are connected.

6. The variable gauge sheath of claim 1, wherein, First anti-slip protrusions are uniformly arranged on the outside of the adjusting mechanism.

7. The variable gauge sheath of claim 1, wherein, Support ribs connected between the connecting horizontal pipe and the connecting inclined pipe are provided.

8. The variable profile sheath of claim 1, wherein, A plurality of creases are provided on the folding pipe body, the folding outer pipe can be attached to the outside of the central pipe by folding along the creases, and the folding outer pipe and the central pipe can be communicated by unfolding along the creases.

9. The variable profile sheath of claim 1, wherein, Second anti-slip protrusions are provided on the outside of one end of the connecting horizontal pipe close to the connecting pipe body.

Images