CN111514435A

CN111514435A - Sheath pipe assembly

Info

Publication number: CN111514435A
Application number: CN202010448551.XA
Authority: CN
Inventors: 陈越猛; 张新龙; 张煊浩; 林志嵩; 邓光亮
Original assignee: Shaoxing Mayo Heart Magnetism Medical Technology Co ltd
Current assignee: Shaoxing Mayo Heart Magnetism Medical Technology Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-08-11

Abstract

The invention discloses a sheath tube assembly, which comprises: a sheath tube; the side tube is connected with the sheath tube and can rotate relative to the sheath tube; the sliding handle is connected with the sheath tube and can move relative to the sheath tube; the two ends of the first traction wire are respectively connected with the sheath tube and the sliding handle; two ends of the second traction wire are respectively connected with the sheath tube and the sliding handle; when the slide lever is moved in the first direction, the curvature of the one end of the sheath tube bent toward the second direction changes, and when the slide lever is moved in the opposite direction to the first direction, the curvature of the one end of the sheath tube bent toward the opposite direction to the second direction changes. By adopting the invention, the sheath tube and the side tube can rotate independently without influencing each other, and the side tube and the catheter instrument positioned in the sheath tube can be prevented from winding and knotting when the sheath tube is rotated. Moreover, the sheath can be bent in two directions, and by changing the bending direction and the bending size of the sheath, the operation can be performed by selecting various head end bending without influencing the rotating operation of the sheath.

Description

Sheath pipe assembly

Technical Field

The invention relates to the technical field of medical instruments, in particular to a sheath tube assembly.

Background

In the related art, the sheath needs to be manipulated in vitro to rotate so that the tip of the sheath points to the desired position and direction of the operator. However, when the sheath is rotated, the side tube at the tail part of the sheath is also rotated, which may hinder the operation and easily cause the side tube to be entangled or knotted with a surgical instrument such as a catheter. When the side tube needs to be rotated, the sheath tube can also rotate together, so that the direction of the head end of the sheath tube is changed to influence the operation, and the pain of the sheath tube entering the skin part is caused. Moreover, the head end of the sheath tube has no bending or only fixed bending, thereby greatly limiting the operation of the operation.

Disclosure of Invention

The embodiment of the invention provides a sheath tube assembly, which is used for solving the problem that the sheath tube assembly in the prior art is inconvenient to use.

A sheath assembly according to an embodiment of the present invention includes:

a sheath tube;

a side tube connected with the sheath tube and rotatable relative to the sheath tube;

a sliding handle connected with the sheath, wherein the sliding handle is movable relative to the sheath;

the two ends of the first traction wire are respectively connected with the sheath tube and the sliding handle;

the two ends of the second traction wire are respectively connected with the sheath tube and the sliding handle;

when the slide lever is moved in the first direction, the curvature of the one end of the sheath tube bent in the second direction changes, and when the slide lever is moved in the opposite direction to the first direction, the curvature of the one end of the sheath tube bent in the opposite direction to the second direction changes.

According to some embodiments of the invention, one end of the side tube is provided with a protrusion, and the other end of the sheath tube is provided with a groove, the protrusion being adapted to movably fit into the groove.

According to some embodiments of the invention, the sheath has a through channel, and the groove is provided in a wall surface of the through channel;

one end of the side tube is suitable for extending into the through channel, and the bulge is arranged on the peripheral wall of one end of the side tube.

According to some embodiments of the invention, the groove is annular and extends in a circumferential direction of a central axis of the sheath.

According to some embodiments of the invention, the protrusion is a plurality of protrusions, and the plurality of protrusions are arranged at intervals in a circumferential direction of the side pipe.

According to some embodiments of the invention, the projection is annular and extends in a circumferential direction of a central axis of the side tube.

According to some embodiments of the invention, the cross-sectional area of the projection decreases from the fixed end to the free end of the projection.

According to some embodiments of the invention, the sheath assembly further comprises:

the sealing element is arranged at the joint of the sheath tube and the side tube so as to seal a connecting gap between the sheath tube and the side tube.

According to some embodiments of the invention, the sheath tube comprises a curved section and a straight section, the curvature of the curved section is variable, one end of the straight section is connected with one end of the curved section, and the other end of the straight section is rotatably connected with the side tube;

the sliding handle is sleeved on the straight line section and is suitable for reciprocating movement along the axial direction of the straight line section;

the first traction wire penetrates through the upper wall surface of the straight line section, and two ends of the first traction wire are respectively connected with the other end of the bent section and the sliding handle;

the second traction wire penetrates through the lower wall surface of the straight line section, and two ends of the second traction wire are respectively connected with the other end of the bent section and the sliding handle;

the degree of curvature of the curved section that curves toward the second direction changes when the slide bar is moved in a first direction, and the degree of curvature of the curved section that curves toward the opposite direction of the second direction changes when the slide bar is moved in the opposite direction of the first direction.

According to some embodiments of the invention, the sheath assembly further comprises: the handle is arranged on the outer peripheral wall of the sheath tube;

the handle includes a slide slot, and the slide bar is adapted to fit into and slide within the slide slot.

By adopting the embodiment of the invention, the sheath tube and the side tube can rotate independently without influencing each other, so that the side tube and the catheter instrument positioned in the sheath tube can be prevented from being wound and knotted when the sheath tube is rotated, and the function and operation of the other side tube are ensured not to be influenced when the instruments related to the sheath tube and the side tube are operated. Moreover, the sheath can be bent in two directions, the accurate positioning of the special or complex target spot by the aid of the control catheter can be assisted by changing the bending direction and the bending size of the sheath, the operation can be performed by selecting various head end bending without influencing the rotating operation of the sheath, and the replacement frequency of the sheath is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:

FIG. 1 is a schematic partial view of a sheath assembly according to an embodiment of the present invention;

FIG. 2 is a schematic partial view of a sheath assembly according to an embodiment of the present invention;

FIG. 3 is a schematic partial view of a sheath assembly according to an embodiment of the invention;

FIG. 4 is a partial schematic structural view of a sheath assembly according to an embodiment of the present invention;

FIG. 5 is a partial schematic view of a sheath assembly according to an embodiment of the present invention;

FIG. 6 is a partial exploded view of the sheath assembly in an embodiment of the invention;

fig. 7 is a partial structural view of a sheath assembly according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As shown in fig. 1 to 4, a sheath assembly 1 according to an embodiment of the present invention includes: sheath 10, side tube 20, sliding handle 30, first pull wire 60, and second pull wire 70. The side tube 20 is connected to the sheath tube 10, and the side tube 20 is rotatable with respect to the sheath tube 10. For example, the sheath tube 10 and the side tube 20 may be independently rotated. The slide handle 30 is connected to the sheath 10, and the slide handle 30 is movable relative to the sheath 10. The two ends of the first traction wire 60 are respectively connected with the sheath tube 10 and the sliding handle 30. The two ends of the second traction wire 70 are respectively connected with the sheath tube 10 and the sliding handle 30.

When the slide lever 30 is moved in the first direction a, the curvature of the one end of the sheath tube 10 bent toward the second direction b is changed, and when the slide lever 30 is moved in the opposite direction of the first direction a, the curvature of the one end of the sheath tube 10 bent toward the opposite direction of the second direction b is changed.

By adopting the embodiment of the invention, the sheath tube 10 and the side tube 20 can rotate independently without influencing each other, so that the side tube 20 and a catheter instrument positioned in the sheath tube 10 can be prevented from being wound and knotted when the sheath tube 10 is rotated, and the function and operation of the other side tube are ensured not to be influenced when the instruments related to the sheath tube 10 and the side tube 20 are operated. Moreover, the sheath 10 can be bent in two directions, and the accurate positioning of the special or complex target point by the catheter can be assisted by changing the bending direction and the bending size of the sheath 10, so that the surgical operation can be performed by selecting various head end bends without influencing the rotating operation of the sheath 10, and the replacement frequency of the sheath 10 is reduced.

On the basis of the above-described embodiment, various modified embodiments are further proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the various modified embodiments.

As shown in fig. 6, according to some embodiments of the present invention, one end of the side tube 20 is provided with a protrusion 201, and the other end of the sheath tube 10 is provided with a groove 101, and the protrusion 201 is adapted to be movably fitted into the groove 101. It is understood that the protrusion 201 may be defined in the slot 101, the connection between the sheath tube 20 and the sheath tube 10 may be achieved by the protrusion 201 cooperating with the slot 101, and the protrusion 201 may be movable in the slot 101, for example, the protrusion 201 may move along the extending direction of the slot 101, so that the sheath tube 10 and the sheath tube 20 may rotate independently. And moreover, the structure is simple, the arrangement is convenient, the processing cost is low, and the realization is easy.

As shown in fig. 1 to 4 and 6, according to some embodiments of the present invention, the sheath 10 has a through passage 100, and a groove 101 is provided in a wall surface of the through passage 100. One end of the side tube 20 is adapted to extend into the through passage 100, and a protrusion 201 is provided on the outer peripheral wall of the one end of the side tube 20. For example, the side tube 20 may include a first section and a second section, the first section having a cross-sectional area that is smaller than the cross-sectional area of the second section. One end of the first section is connected with one end of the second section, and a step can be formed at the connection part of the first section and the second section. The first section is adapted to fit into the through channel 100 of the sheath 10, and the outer peripheral wall of the first section is provided with a protrusion 201, and the protrusion 201 can fit into the groove body 101 of the through channel 100. The first segment may rotate within the through passage 100. This can improve the connection stability and connection sealing property between the sheath tube 10 and the side tube 20.

As shown in fig. 6, according to some embodiments of the present invention, a part of the wall surface of the through-channel 100 is recessed toward the outside of the through-channel 100 to form a groove body 101. Thereby, the configuration of the tank body 101 can be facilitated, and the tank body 101 can be prevented from occupying the space of the through passage 100.

As shown in fig. 6, according to some embodiments of the present invention, the groove body 101 is annular and extends in the circumferential direction of the central axis of the sheath 10. Thereby, the assembling stability of the projection 201 and the tank body 101 can be improved. Of course, this is only one expression of the tank 101, and the structure of the tank 101 is not specifically limited. For example, according to other embodiments of the present invention, the groove body 101 may have an arc-shaped section and extend in a circumferential direction of the central axis of the sheath 10. Further, the arc segment may be a plurality of segments, and the plurality of segments may be arranged at intervals in the circumferential direction of the central axis of the sheath tube 10.

As shown in fig. 6, according to some embodiments of the present invention, the protrusion 201 is annular and extends in a circumferential direction of the central axis of the side tube 20. Thereby, the assembling stability of the projection 201 and the tank body 101 can be improved. Of course, this is only one expression of the protrusion 201, and is not a specific limitation on the structure of the protrusion 201. For example, according to other embodiments of the present invention, the protrusion 201 may have an arc segment and extend in a circumferential direction of the central axis of the side tube 20. Further, the protrusion 201 may be plural, and the plural protrusions 201 are arranged at intervals along the circumferential direction of the side tube 20.

It should be noted that the above protrusions 201 and various embodiments of the slot 101 may be combined as desired.

As shown in fig. 6, according to some embodiments of the present invention, the cross-sectional area of protrusion 201 gradually decreases from the fixed end to the free end of protrusion 201. It should be noted that the "cross-sectional area" referred to herein is understood as the area of a cross-section formed by cutting the protrusion 201 in a plane parallel to the central axis of the side tube 20. It will be appreciated that the cross-sectional area of the end of the projection 201 connected to the side tube 20 is greater than the cross-sectional area of the end of the projection 201 remote from the side tube 20. From this, not only can be through improving the area of being connected of stiff end and side pipe 20 to improve the stability of being connected of protruding 201 and side pipe 20, can also be through reducing the area of free end, with reducing the area of contact of free end and cell body 101, with the frictional resistance that reduces protruding 201 and cell body 101, thereby can be convenient for protruding 201 and move in cell body 101, and then can be convenient for sheath 10 for the rotation of side pipe 20. For example, according to some embodiments of the present invention, the free end of the projection 201 may be formed as a pointed tip.

As shown in fig. 1-4, 6, 7, according to some embodiments of the present invention, the sheath assembly 1 further comprises: and a sealing member 40, wherein the sealing member 40 is arranged at the joint of the sheath tube 10 and the side tube 20 to seal the joint gap between the sheath tube 10 and the side tube 20. For example, the side tube 20 may include a first section and a second section, the first section having a cross-sectional area that is smaller than the cross-sectional area of the second section. One end of the first section is connected with one end of the second section, and a step can be formed at the connection part of the first section and the second section. The first section is adapted to fit into the through channel 100 of the sheath 10, and the outer peripheral wall of the first section is provided with a protrusion 201, and the protrusion 201 can fit into the groove body 101 of the through channel 100. The first segment may rotate within the through passage 100. The sealing member 40 may be sleeved on the first section and sandwiched between the second section and the sheath 10.

According to some embodiments of the invention, the traction wire is a steel wire.

As shown in fig. 5, according to some embodiments of the present invention, the sheath 10 includes a curved section 110 and a straight section 120, and the curvature of the curved section 110 is variable. For example, the bending section 110 is a flexible member, and the bending section 110 can be straightened or bent, and the direction and degree of the bending can be adjusted. One end of the straight line segment 120 is connected to one end of the curved segment 110, and the other end of the straight line segment 120 is rotatably connected to the side tube 20.

As shown in fig. 1-4, the slide bar 30 is sleeved on the straight section 120 and adapted to move back and forth along the axis of the straight section 120. It will be appreciated that slide handle 30 can slide on linear section 120. The first pulling wire 60 is inserted into the upper wall surface of the straight section 120, and two ends of the first pulling wire 60 are respectively connected with the other end of the curved section 110 and the sliding handle 30. The second pulling wire 70 is inserted into the lower wall surface of the straight section 120, and two ends of the second pulling wire 70 are respectively connected to the other end of the curved section 110 and the sliding handle 30.

When the slider 30 is moved in the first direction a, the degree of curvature of the curved section 110 that is curved toward the second direction b changes, and when the slider 30 is moved in the opposite direction of the first direction a, the degree of curvature of the curved section 110 that is curved toward the opposite direction of the second direction b changes.

As shown in fig. 1-4, according to some embodiments of the present invention, the sheath assembly 1 further comprises: and a handle 50, wherein the handle 50 is arranged on the outer peripheral wall of the sheath tube 10. Handle 50 includes a slide slot into which slide bar 30 is adapted to fit and slide. For example, the handle 50 may be sleeved outside the sheath 10, and a portion of the handle 50 is spaced apart from the sheath 10 to form a slide groove into which the slide bar 30 may be fitted.

The sheath assembly 1 according to the embodiment of the present invention is described in detail in one specific embodiment with reference to fig. 1 to 7. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting. All similar structures and similar variations thereof adopted by the invention are intended to fall within the scope of the invention.

As shown in fig. 1 to 4, a sheath assembly 1 according to an embodiment of the present invention includes: sheath 10, side tube 20, sliding handle 30, seal 40, handle 50, first pull wire 60, and second pull wire 70.

As shown in fig. 5, the sheath 10 includes a curved section 110 and a straight section 120. The bending section 110 is a flexible member, the bending section 110 can be straightened or bent, and the direction and degree of bending of the bending section 110 can be adjusted. One end of the straight section 120 is connected to one end of the curved section 110. The other end of the straight section 120 is rotatably connected to the side tube 20. The sheath 10 has a usable length of 50cm or more.

Specifically, as shown in fig. 1-4, the sheath 10 has a through channel 100, the through channel 100 being used for passage of a surgical instrument. The diameter of the through passage 100 is 5F or more. The side tube 20 has an inner cavity communicating with the through passage 100.

As shown in fig. 6, the side tube 20 may include a first section and a second section, the first section having a cross-sectional area smaller than that of the second section. One end of the first section is connected with one end of the second section, and a step can be formed at the connection part of the first section and the second section. The other end of the second section is connected with the transfusion tube through a tee joint. The first section is adapted to extend from the other end of the straight section 120 into the through-channel 100. The peripheral wall of the first section is provided with an annular protrusion 201, and the annular protrusion 201 extends in the circumferential direction of the first section. The protrusion 201 is cut in a plane parallel to the central axis of the first segment, and the sectional shape of the protrusion 201 is in a "V" shape.

As shown in fig. 6, a part of the wall surface of the through-passage 100 located at the other end of the straight line segment 120 is recessed toward the outside of the through-passage 100 to form a groove body 101. The groove 101 is annular and extends in the circumferential direction of the through passage 100. The groove body 101 comprises a first wall surface and a second wall surface, the first wall surface and the second wall surface are both annular, one side of the first wall surface is connected with one side of the second wall surface, the other side of the first wall surface is spaced from the other side of the second wall surface to form an opening of the groove body 101, and the distance between the first wall surface and the second wall surface is gradually reduced from one side of the first wall surface to the other side of the first wall surface. The first wall surface and the second wall surface may be formed in a "V" shape. The projection 201 is adapted to fit into the channel 101 of the through channel 100. The first segment may rotate within the through passage 100.

As shown in fig. 1-4, 6, and 7, the seal 40 is annular. The seal member 40 is sleeved on the first section and sandwiched between the second section and the straight section. The sealing member 40 serves to prevent liquid inside the sheath 10 from seeping out and gas outside the body from entering the sheath 10.

As shown in fig. 1-4, the handle 50 comprises a barrel 510 and a ring 520, the ring 520 is sleeved on the linear section 120 of the sheath tube 10, and the radial inner end of the ring 520 is connected with the outer circumferential wall of the linear section 120. A barrel 510 is sleeved over the straight section 120 and spaced from the straight section 120, with one axial end of the barrel 510 connected to the radially outer end of the ring 520. The inner circumferential wall of the barrel 510, the ring 520, and the outer circumferential wall of the sheath 10 may be configured to form a slide groove. The sliding handle 30 is sleeved on the straight section 120, and at least a part of the sliding handle 30 can extend into the sliding slot and slide in the sliding slot, in other words, the length of the sliding handle 30 extending into the sliding slot can be adjusted.

As shown in fig. 1 to 4, the upper wall surface of the straight line segment 120 is provided with a first through hole 121, and the lower wall surface of the straight line segment 120 is provided with a second through hole 122. The second through hole 122 is located upstream of the first through hole 121 in the first direction a, and the second through hole 122 is located on the right side of the first through hole 121 as viewed in fig. 1.

As shown in fig. 1, the end surface of the sliding handle 30 near the side tube 20 is provided with a first fixing point 310 and a second fixing point 320, and the first fixing point 310 and the second fixing point 320 are respectively located above and below the sheath tube 10. The barrel 510 is provided with a third fixing point 511. The third fixing point 511 is located above the first through hole 121. The third fixing point 511 is located downstream of the first fixing point 310 in the first direction a, the third fixing point 511 being located to the left of the first fixing point 310 as seen in fig. 5.

As shown in fig. 1, the first pulling wire 60 is inserted into the first through hole 121, one end of the first pulling wire 60 located inside the straight section 120 is connected to the other end of the curved section 110, and one end of the first pulling wire 60 located outside the straight section 120 passes through the first fixing point 310 and is connected to the third fixing point 511. The second pulling wire 70 is inserted into the second through hole 122, one end of the second pulling wire 70 located in the straight section 120 is connected to the other end of the curved section 110, and one end of the second pulling wire 70 located outside the straight section 120 is connected to the second fixing point 320.

When the slide handle 30 is in the predetermined position, the curved section 110 is in a straightened state, as shown in fig. 1. At this time, the first fixing point 310, the second fixing point 320, and the first through hole 121 are located on the same vertical plane. The vertical plane here is a plane perpendicular to the central axis of the sheath 10.

Upon moving the slider 30 in the first direction a with the slider 30 in the preset position, the curved section 110 curves toward the second direction b and the magnitude of the curve increases as the distance of movement increases. At this time, the first fixing point 310 is gradually close to the third fixing point 511 and far from the first through hole 121, but the first fixing point 310 is always between the third fixing point 511 and the first through hole 121. The second fixing point 320 is gradually far from the second through hole 122, and the second traction wire 70 forms a traction force to the bending section 110, and the traction force is increased and the bending amplitude is increased as the moving distance is increased, as shown in fig. 2.

When the slider 30 is moved in the opposite direction of the first direction a based on the slider 30 being in the preset position, the bending section 110 is bent in the opposite direction of the second direction b and the magnitude of the bending increases as the distance of the movement increases. At this time, the second fixing point 320 gradually approaches the second through hole 122, but the second fixing point 320 is always located on the left side of the second through hole 122 (i.e., the second fixing point 320 is always located downstream of the second through hole 122 in the first direction a). The first fixing point 310 is simultaneously gradually far from the third fixing point 511 and the first through hole 121, and the first traction wire 60 forms a traction force to the bending section 110, and the traction force is increased and the bending amplitude is increased as the moving distance is increased, as shown in fig. 3.

By adopting the embodiment of the invention, the sheath 10 and the side tube 20 can be independently rotated, and the head end bending in multiple directions and multiple sizes can be selected for operation without influencing the rotating operation of the sheath 10, thereby reducing the replacement frequency of the sheath 10.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and those skilled in the art can make various modifications and changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the description of the present specification, reference to the description of "some embodiments," "examples," "specific examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention, and may be combined between the various embodiments. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. The particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. For example, in the claims, any of the claimed embodiments may be used in any combination.

Claims

1. A sheath assembly, comprising:

a sheath tube;

2. The sheath assembly of claim 1, wherein one end of the side tube is provided with a protrusion, and the other end of the sheath is provided with a groove, the protrusion being adapted to movably fit into the groove.

3. The sheath assembly of claim 2, wherein the sheath has a through channel, and the groove is provided in a wall surface of the through channel;

4. The sheath assembly of claim 2, wherein the slot is annular and extends in a circumferential direction of a central axis of the sheath.

5. The sheath assembly of claim 4, wherein the protrusion is plural, and the plural protrusions are arranged at intervals in a circumferential direction of the side tube.

6. The sheath assembly of claim 4, wherein the protrusion is annular and extends in a circumferential direction of a central axis of the side tube.

7. The sheath assembly of claim 2, wherein the cross-sectional area of the projection decreases from the fixed end to the free end of the projection.

8. The sheath assembly of claim 1, wherein the sheath assembly further comprises:

9. The sheath assembly of claim 1, wherein the sheath comprises a curved section having a variable curvature and a straight section having one end connected to one end of the curved section and the other end rotatably connected to the side tube;

10. The sheath assembly of claim 1, wherein the sheath assembly further comprises: the handle is arranged on the outer peripheral wall of the sheath tube;