CN217526048U - Adjustable bent sheath - Google Patents

Abstract

The utility model relates to an adjustable curved sheath pipe, this adjustable curved sheath pipe include sheath pipe subassembly, handle components, accent curved subassembly and traction wire, and wherein, the inside piece that is provided with of handle components, the piece offsets with sheath pipe subassembly in wire outlet department, can prevent that when the tractive traction wire, the deformation of radial direction takes place for sheath pipe subassembly, leads to transferring the curved angle and diminishes, further can prevent that sheath pipe subassembly from breaking.

Description

Adjustable bent sheath tube

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an adjustable curved sheath pipe.

Background

Medical sheaths have been widely used in minimally invasive interventional diagnostic and therapeutic procedures for creating channels, delivering or retrieving instruments, infusing drugs, or removing bodily fluids. Compared with a common sheath tube, the adjustable-bending sheath tube has an adjustable-bending function, and can quickly and reliably reach a target lesion position through free bending adjustment of the far end so as to reduce operation time.

At present, the bending adjusting mechanisms of the bending adjustable electrophysiology catheter and the sheath catheter in the market are basically that a slidable traction wire is embedded in a catheter body, the far end of the traction wire is fixed with the TIP head of the tube body, and the near end of the traction wire is fixed with the regulating handle.

When the traction wire is adjusted through the adjusting handle, the catheter is soft, and can deform under the action of tension, so that the bending angle is reduced, and the catheter is broken.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem and providing an adjustable bent sheath tube.

The adjustable bending sheath tube provided by the embodiment comprises a sheath tube component, a handle component, a bending adjusting component and a traction wire, wherein one end of the sheath tube component penetrates into the handle component and is connected with the handle component, the bending adjusting component is positioned on the side surface of the handle component and is in angle connection with the handle component,

the utility model discloses a handle subassembly, including handle subassembly, sheath pipe subassembly, traction wire, silk, drawing wire one end is connected the sheath pipe subassembly, the traction wire other end warp inside the sheath pipe subassembly, reachs follow in the handle subassembly the lateral wall of sheath pipe subassembly is worn out the lateral wall department of sheath pipe subassembly forms out the silk hole, then the traction wire other end gets into in the accent curved subassembly and with it connects to transfer curved subassembly, wherein, the inside piece that is provided with of handle subassembly blocks silk hole department with the sheath pipe subassembly offsets.

Above-mentioned adjustable curved sheath pipe is through setting up the piece that blocks in handle assembly's inside, should block and can offset with the sheath pipe subassembly in wire outlet department, can prevent when the tractive haulage silk, and radial direction's deformation takes place for the sheath pipe subassembly, leads to the angle of turning to diminish, further can prevent that the sheath pipe subassembly from breaking.

In an embodiment, after the pull wire extends out of the wire outlet hole, the pull wire passes through the space between the sheath tube assembly and the blocking member and directly enters the bending adjusting assembly along the tangential direction of the surface of the blocking member.

In one embodiment, the blocking member is connected to the inside of the handle assembly at least one end, the overall shape of the blocking member comprises one or more of a line shape, a strip shape or a block shape, and the cross section of the blocking member comprises one or more of a circle shape, a semi-circle shape, a square shape, a polygon shape or an irregular shape.

In one embodiment, two ends of the blocking member are movably connected to the inside of the handle assembly respectively, and the blocking member can rotate relative to the handle assembly.

In one embodiment, the blocking member and the sheath assembly are disposed across from each other.

In one embodiment, the blocking member is disposed at a right angle to the sheath assembly.

In one embodiment, the contact position of the barrier and the traction wire is a circular arc surface.

In one embodiment, the arcuate surface is a smooth surface.

In one embodiment, the handle assembly comprises a housing, the housing comprises a first housing and a second housing which are spliced with each other, one end of the blocking piece is arranged in the first housing, and the other end of the blocking piece abuts against the second housing.

In one embodiment, a slot is formed in the second housing, and the other end of the blocking member is clamped in the slot.

Drawings

In order to illustrate the solution of the present invention more clearly, the drawings needed for describing the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:

fig. 1 is a schematic perspective view of an adjustable sheath according to this embodiment.

Fig. 2 is a top view and a schematic sectional view along the direction F-F of the adjustable bending sheath in fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a partial structural schematic diagram including the first housing in fig. 1.

Fig. 5 is another schematic structural diagram of fig. 1.

Fig. 6 is an enlarged view at B in fig. 5.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the field of interventional medical devices, the "distal end" is defined as the end that is distal from the operator during the procedure, and the "proximal end" is defined as the end that is proximal to the operator during the procedure. "axial" refers to a direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device, and "radial" refers to a direction perpendicular to the axial direction.

The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. The meaning of "plurality" is two or more unless specifically limited otherwise.

In the description and claims of the present invention and in the above description of the drawings, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be noted that the flexible sheath provided by the present invention can be used to deliver a variety of implantable devices, such as vascular stents, valves, occluders or filters.

Referring to fig. 1, the present embodiment provides an adjustable bending sheath 100, the adjustable bending sheath 100 includes a sheath assembly 1, a handle assembly 2 and a bending adjusting assembly 3, wherein one end of the sheath assembly 1 penetrates into the handle assembly 2 and is connected to the handle assembly 2, and the bending adjusting assembly 3 is located at a side of the handle assembly 2 and is connected to the handle assembly 2 at an angle.

With reference to fig. 2 and 3, one end of the pulling wire 4 is connected to the sheath assembly 1, and the other end of the pulling wire 4 passes through the inside of the sheath assembly 1, penetrates out from the side wall of the sheath assembly 1 after reaching the inside of the handle assembly 2, and forms a wire outlet 5 at the side wall of the sheath assembly 1, and then the other end of the pulling wire 4 enters the bend adjusting assembly 3 and is connected with the bend adjusting assembly 3. Wherein, handle component 2 is inside to be provided with and to block piece 6, blocks 6 and offsets with sheath pipe subassembly 1 in a silk hole 5 department. The blocking piece 6 is arranged in such a way that when the bending adjusting assembly 3 is operated to draw the traction wire 4, and the wire outlet hole 5 of the sheath tube assembly 1 is subjected to the acting force of the traction wire 4, the sheath tube assembly 1 can be prevented from deforming in the radial direction, so that the bending adjusting angle is reduced; when the above-mentioned acting force is excessive, the sheath assembly 1 can also be prevented from being broken.

In this embodiment, the pull wire 4 extends from the wire outlet 5, passes through the space between the sheath assembly 1 and the blocking member 6, and directly enters the bend adjusting assembly 3 along the tangential direction of the surface of the blocking member 6. Because the one-hand operation of being convenient for, transfer curved subassembly 3 and sheath pipe subassembly 1 and become certain angle, when the equipment with transfer curved, the easy card silk. So set up, be in order to let pull wire 4 can keep in handle components 2 inside region near the center, carry out effective spacing to pull wire 4 to avoid when the equipment and transfer the turn, pull wire 4 removes towards the region of handle components 2 inside edges, the condition of card dun perhaps calorie of silk appears. In other embodiments, the pull wire 4 extends from the wire outlet hole 5 and then is wound on the surface of the blocking member 6, so that the sheath assembly 1 and the blocking member 6 are both located on the same side of the pull wire 4, and then enter the bend adjusting assembly 3.

In this embodiment, the contact portion of the blocking member 6 and the pull wire 4 has a circular arc-shaped surface, so that the pull wire 4 can be guided into the bending adjustment assembly 3, and the friction between the blocking member 6 and the pull wire 4 can be reduced. Further, the rounded surface is a smooth surface, which also reduces the friction between the stop member 6 and the pull wire 4. In other embodiments, the surface of the stop 6 in contact with the pull wire 4 may or may not be a rounded surface.

Referring to fig. 4, the blocking member 6 is connected at least at one end thereof to the inside of the handle assembly 2, the blocking member 6 has a bar shape as a whole, and the blocking member 6 has a circular, specifically cylindrical, cross-section. In other embodiments, the entirety of the barrier 6 comprises one or more of a linear, strip, or block shape, and the cross-section of the barrier 6 comprises one or more of a circular, semi-circular, square, polygonal, or irregular shape. The irregular shape may include a petal shape, a pentagram shape, a heart shape, and the like.

In the present embodiment, two ends of the blocking member 6 are respectively and fixedly connected to the inside of the handle assembly 2, and in other embodiments, two ends of the blocking member 6 are respectively and movably connected to the inside of the handle assembly 2, so that the blocking member 6 is in a roller shape as a whole, and the friction force between the blocking member 6 and the traction wire 4 can be reduced. In one embodiment, only one end of the blocking member 6 is connected to the inside of the handle assembly 2, respectively.

Referring to fig. 5 and 6, the blocking member 6 is disposed at a right angle to the sheath assembly 1, and when the pulling wire 4 is pulled and the force of the pulling wire 4 is applied to the filament outlet 5 of the sheath assembly 1, the blocking member 6 disposed at a right angle to the sheath assembly 1 can more stably fix the sheath assembly 1, thereby preventing the sheath assembly 1 from shifting. It will be appreciated that in other embodiments, the blocking member 6 may be disposed across the sheath assembly 1, and may also serve to stabilize the sheath assembly 1.

Referring to fig. 1 and 4, the handle assembly 2 includes a housing 21, the housing 21 includes a first housing 211 and a second housing (not shown) that are joined to each other, one end of the blocking member 6 is disposed in the first housing 211, and the other end of the blocking member 6 abuts against the second housing. In one embodiment, a slot (not shown) is provided in the second housing, and the other end of the blocking member 6 is held in the slot. It will be appreciated that the blocking member 6 is integrally formed with the first housing 211, or is attached by welding or gluing, etc.

The operation principle of the bendable sheath 100 is as follows:

transfer and include the fixed silk slider (not shown) in the curved subassembly 3, the distal end of sheath pipe subassembly 1 or the position that is close to the distal end is connected to 4 one ends of traction wire, and the other end of traction wire is worn out from the lateral wall of sheath pipe subassembly 1 behind sheath pipe subassembly 1 is inside, then 4 other ends of traction wire get into transfer curved subassembly 3 in and with transfer curved subassembly 3 in the fixed silk slider be connected. This decide silk slider surface has the external screw thread, has the internal thread in transferring curved subassembly 3, and the external screw thread is mutually supported with the internal thread, transfers curved subassembly 3 through the rotating to drive and decide silk slider and transfer curved subassembly 3 internal motion to drive the motion of traction wire 4, further drive the distal end of sheath pipe subassembly 1 or be close to the position atress of distal end and produce the deformation, thereby realize the distal end of sheath pipe subassembly 1 or the position bending near the distal end.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. An adjustable bending sheath tube comprises a sheath tube component, a handle component, a bending adjusting component and a traction wire, wherein one end of the sheath tube component penetrates into the handle component and is connected with the handle component, the bending adjusting component is positioned on the side surface of the handle component and is connected with the handle component in an angle manner,

the utility model discloses a handle assembly, including handle subassembly, sheath pipe subassembly, pull wire one end is connected the sheath pipe subassembly, the pull wire other end warp inside the sheath pipe subassembly, reachs follow behind the handle assembly the lateral wall of sheath pipe subassembly is worn out the lateral wall department of sheath pipe subassembly forms out the silk hole, then the pull wire other end gets into in the accent curved subassembly and with the accent curved subassembly is connected, wherein, the inside blockking that is provided with of handle subassembly, it is in to block go out silk hole department with the sheath pipe subassembly offsets.

2. The adjustable bending sheath of claim 1, wherein the pull wire extends from the wire exit hole and passes between the sheath assembly and the blocking member, and directly enters the bending assembly along a tangential direction of the surface of the blocking member.

3. The adjustable bend sheath of claim 1, wherein said blocking member is attached at least at one end to the interior of said handle assembly, wherein the overall shape of said blocking member comprises one or more of a linear shape, a bar shape, or a block shape, and wherein the cross-section of said blocking member comprises one or more of a circular shape, a semi-circular shape, a square shape, a polygonal shape, or an irregular shape.

4. The adjustable bending sheath of claim 3, wherein both ends of the blocking member are movably connected to the inside of the handle assembly, respectively, and the blocking member is rotatable relative to the handle assembly.

5. The adjustable bend sheath of claim 3, wherein said stop is disposed across said sheath assembly.

6. The adjustable bend sheath of claim 3, wherein said stop is disposed at a right angle to said sheath assembly.

7. The adjustable bend sheath of claim 2, wherein the stop is arcuate in contact with the pull wire.

8. The tunable curved sheath of claim 7, wherein the arcuate surface is a smooth surface.

9. The adjustable bending sheath of claim 3, wherein the handle assembly comprises a housing including a first housing and a second housing joined to each other, one end of the blocking member is disposed in the first housing, and the other end of the blocking member abuts against the second housing.

10. The adjustable bending sheath of claim 9, wherein a slot is provided in the second housing, and the other end of the blocking member is retained in the slot.

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