CN215083923U

CN215083923U - Cam adjustable bending sheath tube

Info

Publication number: CN215083923U
Application number: CN202120249698.6U
Authority: CN
Inventors: 阮成民; 肖建平; 翟梦林
Original assignee: Guangdong Pulse Medical Technology Co ltd
Current assignee: Guangdong Pulse Medical Technology Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-12-10
Anticipated expiration: 2031-01-28

Abstract

The utility model provides a cam adjustable bending sheath tube, which comprises a catheter, a traction wire and a handle component, wherein the handle component comprises a positioning sleeve, a cam and a sliding part; two opposite bending adjusting holes are formed in the side wall of the guide pipe and extend along the axial direction of the guide pipe; the positioning sleeve is sleeved on the outer side of the guide pipe; the cam is sleeved outside the positioning sleeve and can rotate around the axis of the cam relative to the positioning sleeve, and the end face of the near end of the cam and the axis of the cam form an included angle; the two sliding pieces are oppositely arranged on the side wall of the positioning sleeve; the sliding piece can move along the axial direction of the positioning sleeve; the sliding piece is movably connected with the end surface of the near end of the cam; the bending adjusting holes are internally provided with traction wires, and the traction wires in the two bending adjusting holes are respectively connected with the two sliding parts. The utility model discloses a cam adjustable bending sheath pipe can drive two slider reverse movements through rotatory cylindrical cam, and then pulls or releases the crooked change of two traction wire control pipe distal ends.

Description

Cam adjustable bending sheath tube

Technical Field

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

Background

The medical sheath tube is used for minimally invasive intervention operation in human blood vessels, and is a treatment method which has the advantages of small operation wound, quick postoperative healing, high operation success rate and wide application range at present. The medical sheath is used for establishing a channel, conveying or recovering instruments, inputting medicines or leading out body fluid, and plays an important role in minimally invasive interventional surgery.

In order to precisely control the bending angle of the distal end of the sheath, attention is increasingly paid to the bendable sheath. At present, a pulling wheel and a pulling rod are generally adopted for pulling a traction wire by a common bending-adjustable sheath pipe on the market, or the traction wire is directly wound on a screw, and the stretching state of the traction wire is changed through the rotation of the screw, so that the bending degree of the tail end of the catheter is controlled.

The structural design and the operation method of the adjustable bent sheath pipe have the defect of low control efficiency of the bending degree of the catheter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a curved sheath pipe of cam adjustable helps solving above-mentioned technical problem.

The utility model discloses a realize like this:

a cam adjustable bending sheath comprises a catheter, a traction wire and a handle assembly, wherein the handle assembly comprises a positioning sleeve, a cam and a sliding piece; two opposite bending adjusting holes are formed in the side wall of the guide pipe and extend along the axial direction of the guide pipe; the positioning sleeve is sleeved outside the guide pipe; the cam is sleeved on the outer side of the positioning sleeve and can rotate around the axis of the cam relative to the positioning sleeve, and the end face of the near end of the cam and the axis of the cam form an included angle; the number of the sliding pieces is two, and the two sliding pieces are oppositely arranged on the side wall of the positioning sleeve; the sliding piece can move along the axial direction of the positioning sleeve; the sliding piece is movably connected with the end face of the near end of the cam; the traction wires are arranged in the bending adjusting holes, and the traction wires in the two bending adjusting holes are respectively connected with the two sliding parts; the cam is used for driving the two sliding pieces to move towards opposite directions on the positioning sleeve, and the two sliding pieces are used for driving the two traction wires to stretch and release so as to bend the distal end of the catheter.

When the sheath tube with the adjustable bending cam rotates the cylindrical cam, the end face of the near end of the cam and the axis of the cam form an included angle, so that the two sliding parts movably connected with the end face can be pushed to move. Since the sliding part moves along the axial direction of the positioning sleeve and the cam is cylindrical, two opposite positions can be selected on the inclined end surface of the cam, so that the two sliding parts movably arranged at the two corresponding positions always move in opposite directions in the process of rotating the cam. And the traction wire in the bending adjusting hole is contracted and released through the two sliding parts, so that the bending state of the far end of the catheter can be rapidly controlled.

Furthermore, one of the outer annular surface of the cam and the sliding piece is provided with a sliding groove, and the other one is correspondingly provided with a clamping block; the clamping block can move in the sliding groove.

Further, the distal end of the slider is provided with a guide groove in which the side wall of the cam is located.

Further, the bottom plane of the guide groove is parallel to the end face of the proximal end of the cam.

Furthermore, a key groove is formed in the outer side of the positioning sleeve, the key groove extends along the axial direction of the positioning sleeve, a protruding block is arranged at the corresponding position on the sliding piece, and the protruding block can move in the key groove.

Further, a handle knob is also included; the handle knob is sleeved on the outer side of the cam and used for driving the cam to rotate.

Furthermore, an annular groove is formed in the inner wall of the handle knob, and a limiting plate is arranged in the annular groove; a boss is arranged on the outer side of the cam, and a limit groove is formed in the boss; the boss is located in the annular groove, and the limiting plate is located in the limiting groove.

Further, the device also comprises a stress dispersion pipe; the stress dispersion tube is in a frustum shape, and the diameter of the far end of the stress dispersion tube is smaller than that of the near end of the stress dispersion tube; the far-end cover of stress dispersion pipe is established the outside of pipe, the near-end of stress dispersion pipe the position sleeve fixed connection.

Further, the protective shell is further included; the protective housing activity cover is established the cam with the outside of handle knob, just the protective housing is fixed to be established the outside of positioning sleeve.

Further, a hemostatic valve is also included; the hemostasis valve is disposed at a proximal end of the catheter, the hemostasis valve in communication with the catheter.

The utility model has the advantages that:

the utility model discloses a cam adjustable bending sheath pipe through rotatory cylindrical cam, can drive two slider reverse movements, and then tensile and two traction wires of release to the crooked change of control pipe distal end has improved the adjustment efficiency of pipe crookedness greatly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a perspective view of a cam adjustable bending sheath provided by the present invention;

fig. 2 is a cross-sectional axial view of the cam adjustable sheath tube provided by the present invention;

fig. 3 is an exploded view of the cam adjustable bending sheath provided by the present invention;

fig. 4 is a front sectional view of the cam adjustable bending sheath provided by the present invention;

fig. 5 is a cross-sectional view of a catheter in a cam adjustable curved sheath provided by the present invention;

fig. 6 is a perspective view of a sliding member in a cam adjustable bending sheath provided by the present invention;

fig. 7 is a perspective view of a second structure of a cam in a cam adjustable bending sheath provided by the present invention;

fig. 8 is a perspective view of the positioning sleeve and the stress dissipating tube in the cam adjustable curved sheath tube provided by the present invention.

Icon: 100-a catheter; 110-bending holes; 200-a positioning sleeve; 210-a keyway; 300-cam; 310-a chute; 320-boss; 330-a limiting groove; 400-a slide; 410-fixture block; 420-a guide groove; 430-a bump; 500-drawing a wire; 600-handle knob; 610-ring groove; 700-stress dissipation tube; 800-protective shell; 900-hemostatic valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 is a perspective view of a cam 300 of the present invention for bending a sheath tube; fig. 2 is a cross-sectional axial view of a cam 300 according to the present invention; fig. 3 is an exploded view of the cam 300 of the present invention; fig. 4 is a front cross-sectional view of the cam 300 of the present invention; fig. 5 is a cross-sectional view of the catheter 100 in a sheath with the cam 300 according to the present invention; fig. 6 is a perspective view of a slider 400 in a sheath tube with adjustable bending of a cam 300 according to the present invention, and fig. 7 is a perspective view of a second structure of the cam 300 in the sheath tube with adjustable bending of the cam according to the present invention; fig. 8 is a perspective view of the positioning sleeve 200 and the stress dissipating tube 700 in the cam adjustable curved sheath tube according to the present invention. Referring to fig. 1 to 8, the present embodiment provides a cam 300 adjustable bending sheath, which includes a catheter 100, a pull wire 500 and a handle assembly, wherein the handle assembly includes a positioning sleeve 200, a cam 300 and a sliding member 400; two bending adjusting holes 110 are oppositely arranged on the side wall of the guide pipe 100, and the bending adjusting holes 110 extend along the axial direction of the guide pipe 100; the positioning sleeve 200 is sleeved outside the guide pipe 100; the cam 300 is cylindrical, the cam 300 is sleeved outside the positioning sleeve 200, the cam 300 can rotate around the axis of the cam 300 relative to the positioning sleeve 200, and the end face of the near end of the cam 300 and the axis of the cam 300 form an included angle; the number of the sliding pieces 400 is two, and the two sliding pieces 400 are oppositely arranged on the side wall of the positioning sleeve 200; the slider 400 is movable in the axial direction of the positioning sleeve 200; the sliding piece 400 is movably connected with the end surface of the near end of the cam 300; the drawing wires 500 are arranged in the bending adjusting holes 110, and the drawing wires 500 in the two bending adjusting holes 110 are respectively connected with the two sliding parts 400; the two sliders 400 can be driven to move in opposite directions on the positioning sleeve 200 by rotating the cam 300, and the two sliders 400 can drive the two pull wires 500 to extend and retract and release so as to bend the distal end of the catheter 100.

The working principle and the operation method of the cam 300 adjustable bending sheath tube of the embodiment are as follows:

when the cam 300 is rotated, the end face of the proximal end of the cam 300 forms an included angle with the axis of the cam 300, so that the two sliding members 400 movably connected with the end face can be pushed to move. Since the slider 400 moves in the axial direction of the positioning sleeve 200 and the cam 300 has a cylindrical shape, two opposite positions can be selected on the inclined end surface of the cam 300, so that the two sliders 400 movably disposed at the two corresponding positions always move in opposite directions during the rotation of the cam 300. The two sliders 400 are used to contract and release the pull wire 500 in the bending hole 110, so that the bending state of the distal end of the catheter 100 can be rapidly controlled.

In the above structure, the catheter 100 is a bendable pipe, wherein a hollow through cavity of the catheter 100 is used for establishing a channel, transporting or recovering instruments, inputting drugs or leading out body fluid, and a bending hole 110 is opened on a side wall of the catheter 100, and the bending hole 110 extends along the axial direction of the catheter 100. Specifically, the pull wire 500 extends from the proximal end of the catheter 100 into the bend adjustment hole 110, or opens in the middle of the catheter 100 into the bend adjustment hole 110, after which the pull wire 500 extends all the way to the distal end of the catheter 100 and is fixed to facilitate bend adjustment control of the distal end of the catheter 100. Moreover, a developing mark is arranged at the far end of the catheter 100, and the position of the catheter 100 can be determined according to the ultrasonic image in the operation to assist the medical staff in bending adjustment operation.

In the above configuration, the positioning sleeve 200 may be configured to be fixedly coupled to the catheter 100 to prevent the positioning sleeve 200 from moving relative to the catheter 100 when the pull wire 500 is pulled.

In the above structure, the cam 300 may be directly sleeved outside the positioning sleeve 200, so that the cam 300 only rotates relative to the positioning sleeve 200. The cam 300 may also be directly contacted with the outer wall of the guide tube 100, and a limit structure is provided between the two to prevent the cam 300 from sliding relative to the guide tube 100 and the positioning sleeve 200 in the axial direction of the three.

In the above configuration, the slider 400 needs to be movably connected to the inclined end surface of the proximal end of the cam 300, and the movement of the slider 400 needs to be driven by the inclined end surface, and the freedom of movement of the slider 400 needs to be restricted in the axial direction of the positioning sleeve 200.

In the above structure, one end of the pull wire 500 is fixed to the slider 400, and the other end thereof penetrates the bending adjustment hole 110 and extends to the distal end of the catheter 100.

On the basis of the above embodiments, as shown in fig. 3, optionally, a sliding groove 310 is disposed on an outer circumferential surface of the cam 300, and a latch 410 is correspondingly disposed on the sliding member 400; when the cam 300 is rotated, the latch 410 moves in the slide groove 310. The fixture block 410 moves in the sliding groove 310, so that the purpose of the cam 300 driving the sliding block to move is achieved, at this time, the extending direction of the sliding groove 310 should be parallel to the proximal end face of the cam 300, or the plane where the center line of the groove cavity of the sliding groove 310 is located should be parallel to the proximal end face of the cam 300. Alternatively, as shown in fig. 7, the latch 410 may be provided on the outer circumferential surface of the cam 300 and the slide groove 310 may be provided on the slider 400.

On the basis of the above embodiment, optionally, as shown in fig. 6, the distal end of the slider 400 is provided with a guide groove 420, and the side wall of the cam 300 is located in the guide groove 420. Wherein the guide groove 420 should grip the side wall of the cam 300 and not affect the interaction of the slide block with respect to the cam 300. The guide groove 420 serves for guiding and stabilizing.

On the basis of the above embodiment, optionally, as shown in fig. 6, the bottom plane of the guide groove 420 is parallel to the end surface of the proximal end of the cam 300. Wherein, above-mentioned two planes are parallel and laminating state, play direction and stable effect equally.

On the basis of the above embodiment, as shown in fig. 3 and 8, optionally, a key groove 210 is provided on the outer side of the positioning sleeve 200, the key groove 210 extends along the axial direction of the positioning sleeve 200, and a protrusion 430 is provided at a corresponding position on the sliding member 400, and the protrusion 430 can move in the key groove 210. The combination of the key slot 210 and the protrusion 430 is for limiting the movement of the sliding member 400 in the axial direction of the positioning sleeve 200.

On the basis of the above embodiments, optionally, as shown in fig. 1 to 4, a handle knob 600 is further included; the handle knob 600 is cylindrical, and the handle knob 600 is sleeved on the outer side of the cam 300 and used for driving the cam 300 to rotate. Wherein, the handle knob 600 should be disposed at the distal end of the cam 300, and the outer annular surface of the handle knob 600 is provided with anti-slip lines, which is advantageous for operation and rotation. But to facilitate installation and removal. The handle knob 600 is preferably assembled in two half-cylindrical sleeves.

On the basis of the above embodiment, optionally, as shown in fig. 3, an annular groove 610 is provided on an inner wall of the handle knob 600, and a limiting plate (not labeled) is provided in the annular groove 610; a boss 320 is arranged on the outer side of the cam 300, and a limit groove 330 is formed in the boss 320; the boss 320 is located in the ring groove 610, and the limit plate is located in the limit groove 330. Among other things, the annular groove 610 and the boss 320 can facilitate the coaxial mounting and sealing of the cam 300 and the handle knob 600. The combination of the position-limiting plate and the position-limiting groove 330 enables the cam 300 and the handle knob 600 to form a rotating whole, thereby preventing the cam 300 from sliding.

On the basis of the above embodiments, as shown in fig. 1 to 4, a stress dispersion tube 700 is optionally further included; the stress dispersion tube 700 is frustum-shaped, and the diameter of the far end of the stress dispersion tube 700 is smaller than that of the near end thereof; the distal end of the stress dispersion tube 700 is sleeved on the outer side of the catheter 100, and the proximal end of the stress dispersion tube 700 is fixedly connected with the positioning sleeve 200. The stress dispersion tube 700 is used to avoid stress concentration caused by bending of the catheter 100, and the stress dispersion tube 700 can be fixedly connected with the positioning sleeve 200 by laser welding, heat sealing, bonding and the like.

On the basis of the above embodiments, optionally, as shown in fig. 1 to 4, a protective shell 800 is further included; protective housing 800 is the tube-shape, protective housing 800 activity cover is established cam 300, handle knob 600's the outside, just protective housing 800 fixed cover is established the outside of position sleeve 200. Wherein, the outer wall of protective housing 800 should still set up anti-skidding line, does benefit to the gripping operation. Likewise, the protective case 800 is preferably assembled by being divided into two half-cylindrical sleeves to facilitate mounting and dismounting. It should be emphasized that, in order to prevent the unnecessary mutual rotation between the positioning sleeve 200 (and the stress dispersion tube 700) and the protection case 800, an annular groove and an annular land may be provided between the protection case 800 and the positioning sleeve 200, which are fastened to each other, so that the protection case 800, the positioning sleeve 200, and the stress dispersion tube 700 remain stationary and do not rotate while the handle knob 600 rotates the driving cam 300. In addition, the inner wall of the protective shell 800 corresponding to the position of the sliding member 400 should be provided with a directional sliding groove, which is parallel to the key slot 210 on the positioning sleeve 200, for ensuring that the sliding member 400 moves along the axial direction of the positioning sleeve 200.

Optionally, the handle knob 600 may be further clamped to the protective shell 800 through a groove, and a gasket is disposed between the handle knob 600 and the protective shell 800 to achieve a certain sealing effect.

On the basis of the above embodiments, optionally, as shown in fig. 1 to 4, a hemostatic valve 900 is further included; the hemostatic valve 900 is disposed at the proximal end of the catheter 100, the hemostatic valve 900 being in communication with the catheter 100. The hemostatic valve 900 can prevent blood in the blood vessel from overflowing to the outside of the body, reduce blood loss, reduce the difficulty of operation, and prevent gas in the body from entering the blood vessel.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will 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 protection scope of the present invention.

Claims

1. A cam (300) adjustable bending sheath, which is characterized by comprising a catheter (100), a traction wire (500) and a handle assembly, wherein the handle assembly comprises a positioning sleeve (200), a cam (300) and a sliding piece (400);

two opposite bending adjusting holes (110) are formed in the side wall of the guide pipe (100), and the bending adjusting holes (110) extend along the axial direction of the guide pipe (100);

the positioning sleeve (200) is sleeved on the outer side of the guide pipe (100);

the cam (300) is sleeved on the outer side of the positioning sleeve (200), the cam (300) can rotate around the axis of the cam (300) relative to the positioning sleeve (200), and the end face of the near end of the cam (300) and the axis of the cam (300) form an included angle;

the number of the sliding pieces (400) is two, and the two sliding pieces (400) are oppositely arranged on the side wall of the positioning sleeve (200); the slider (400) is movable in the axial direction of the positioning sleeve (200); the sliding piece (400) is movably connected with the end surface of the proximal end of the cam (300);

the drawing wires (500) are arranged in the bending adjusting holes (110), and the drawing wires (500) in the two bending adjusting holes (110) are respectively connected with the two sliding parts (400);

the cam (300) is used for driving the two sliding pieces (400) to move in opposite directions on the positioning sleeve (200), and the two sliding pieces (400) are used for driving the two traction wires (500) to stretch and release so as to bend the distal end of the catheter (100).

2. The adjustable-bending sheath catheter of the cam (300) according to claim 1, wherein one of the outer annular surface of the cam (300) and the sliding member (400) is provided with a sliding groove (310), and the other is correspondingly provided with a fixture block (410); the latch (410) is movable in the slide groove (310).

3. The cam (300) adjustable bending sheath according to claim 1, characterized in that the distal end of the slider (400) is provided with a guide groove (420), the side wall of the cam (300) being located in the guide groove (420).

4. The cam (300) tunable sheath according to claim 3, wherein a bottom plane of the guide groove (420) is parallel to an end surface of the proximal end of the cam (300).

5. The cam (300) adjustable bending sheath according to claim 1, wherein a key groove (210) is provided on the outer side of the positioning sleeve (200), the key groove (210) extends along the axial direction of the positioning sleeve (200), a protrusion (430) is provided on the sliding member (400) at a corresponding position, and the protrusion (430) can move in the key groove (210).

6. The cam (300) adjustable bending sheath according to any claim 1-5, further comprising a handle knob (600); the handle knob (600) is sleeved on the outer side of the cam (300) and used for driving the cam (300) to rotate.

7. The cam (300) adjustable bending sheath according to claim 6, wherein the inner wall of the handle knob (600) is provided with a ring groove (610), and a limit plate is arranged in the ring groove (610); a boss (320) is arranged on the outer side of the cam (300), and a limit groove (330) is formed in the boss (320); the boss (320) is positioned in the ring groove (610), and the limit plate is positioned in the limit groove (330).

8. The cam (300) tunable bending sheath of claim 6, further comprising a stress dissipating tube (700); the stress dispersion tube (700) is frustum-shaped, and the diameter of the far end of the stress dispersion tube (700) is smaller than that of the near end thereof;

the far end of the stress dispersion tube (700) is sleeved on the outer side of the catheter (100), and the near end of the stress dispersion tube (700) is fixedly connected with the positioning sleeve (200).

9. The cam (300) tunable bending sheath of claim 6, further comprising a protective shell (800); the protective housing (800) is movably sleeved on the cam (300) and the outer side of the handle knob (600), and the protective housing (800) is fixedly sleeved on the outer side of the positioning sleeve (200).

10. The cam (300) tunable bending sheath of claim 9, further comprising a hemostasis valve (900); the hemostasis valve (900) is disposed at a proximal end of the catheter (100), the hemostasis valve (900) being in communication with the catheter (100).