CN216797814U

CN216797814U - Bendable guide sheath device

Info

Publication number: CN216797814U
Application number: CN202122568576.6U
Authority: CN
Inventors: 周根青; 刘少稳
Original assignee: Shanghai First Peoples Hospital
Current assignee: Shanghai First Peoples Hospital
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-06-24
Anticipated expiration: 2031-10-25

Abstract

The utility model discloses a bending-adjustable guide sheath device, which comprises: the sheath tube, the handle shell, the rotating assembly and the bending adjusting assembly; the sheath pipe is sleeved in the handle shell, and the front end of the sheath pipe extends out of the handle shell; the rotating assembly comprises: the rotating cap is sleeved outside the rear end of the handle shell, and the threaded rod is arranged in the handle shell and is driven by the rotating cap to longitudinally translate along the sheath tube; the bend adjusting component comprises: at least a fixed pulley, a first pull wire and a second pull wire which are oppositely arranged at two sides of the sheath tube; one end of the first pull wire is fixed on the sheath tube, and the other end of the first pull wire is fixed with the threaded rod by bypassing the fixed pulley; one end of the second stay wire is fixed on the sheath tube, and the other end of the second stay wire is directly fixed on the threaded rod. According to the utility model, the rotating assembly and the bending adjusting assembly are arranged, and the rotating cap is arranged at the rear end of the handle shell, so that a user can conveniently rotate and bend by one hand and operate the sheath catheter and the ablation catheter by left and right hands separately.

Description

Bendable guide sheath device

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a bending-adjustable guide sheath device which is used for interventional therapy of cardiovascular diseases, particularly arrhythmia interventional therapy.

Background

Atrial fibrillation is one of the most common persistent arrhythmia, the prevalence rate is 1-2%, and more than 1000 ten thousand patients with atrial fibrillation are estimated in China. With the increase of the aging of population and the incidence of related diseases, the number of people suffering from atrial fibrillation in China will be doubled in the future. The atrial fibrillation has serious harm, can cause stroke, heart failure and the like at the same time, has high disability and fatality rate, and causes serious burden to patients, families and society. Catheter ablation is one of the main means of non-drug treatment of atrial fibrillation, point-by-point radio frequency ablation is the mainstream operation mode, the success rate of the operation is continuously improved, the operation adaptation is continuously expanded, currently, more than 6 cases/year exist, and more than 30 cases/year are possible to be increased in the future.

At present, in arrhythmia catheter ablation treatment operations, such as atrial fibrillation and atrial flutter, fixed bent sheath tubes are mostly used for the operations. The fixed bent sheath tube has high requirements on the operation level of the catheter of an operator, and can support the lower catheter to be difficult to put in place and unstable in sticking and the like under the conditions of obvious enlargement of an atrium, anatomical variation, unsatisfactory interatrial septum puncture points and the like.

In recent years, the use proportion of the adjustable bent sheath tube gradually rises, and earlier researches show that the adjustable bent sheath tube is used for surgery, which is beneficial to facilitating catheter operation, in-place catheter and improving catheter sticking stability, and is beneficial to improving surgery efficiency and success rate.

However, when the operation is performed by changing the fixed curved sheath to the adjustable curved sheath, the operator is unable to adapt to the operation and the learning curve is long.

At present, in the adjustable-bending guide sheath for clinical application, the rotating cap is arranged at the front end of the operating handle and is designed for double-hand operation. The design does not accord with the habits of a clinician for operating the fixed bent sheath catheter by the left hand and operating the ablation catheter by the right hand, so that the formed operation habit needs to be changed when the adjustable bent sheath catheter is used, the problems of difficult adaptation, long learning curve and the like exist, and the catheter operation is not fine enough; meanwhile, the adjustable bent sheath tube is operated by two hands, and the efficiency is lower than that of the left and right hands for operating the sheath tube and the ablation catheter separately.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a guide sheath device capable of being operated and bent by a single hand, wherein a rotating cap is arranged at the rear end of a handle shell, so that a user can conveniently rotate and bend by the single hand and operate a sheath catheter and an ablation catheter by left and right hands separately.

In order to achieve the above object, the present invention provides an adjustable bending introducer sheath device, comprising: the sheath tube, the handle shell, the rotating assembly and the bending adjusting assembly;

the sheath pipe is sleeved in the handle shell, and the front end of the sheath pipe extends out of the handle shell;

the rotating assembly comprises: the rotating cap is sleeved outside the rear end of the handle shell, and the threaded rod is arranged in the handle shell and is driven by the rotating cap to longitudinally translate along the sheath tube;

the bend adjusting component comprises: at least a fixed pulley, a first pull wire and a second pull wire which are oppositely arranged at two sides of the sheath tube; one end of the first pull wire is fixed on the sheath tube, and the other end of the first pull wire is fixed with the threaded rod by bypassing the fixed pulley; one end of the second stay wire is fixed on the sheath tube, and the other end of the second stay wire is directly fixed on the threaded rod.

Optionally, the rotating assembly further comprises: the threaded sleeve is sleeved on the inner wall of the handle shell, the threaded rod is sleeved in the threaded sleeve, and the inner wall of the threaded sleeve is provided with an internal thread which is in threaded fit with the threaded rod.

Optionally, the rotating assembly further comprises: the transmission gear is fixed in the handle shell, is positioned between the threaded sleeve and the rotating cap, and is respectively meshed with the threaded sleeve and the rotating cap; the outer wall of the threaded sleeve is also provided with an outer gear which is meshed with the transmission gear.

Optionally, the transmission gear is fixed in the handle shell through a pin shaft, and the transmission gear rotates around the pin shaft.

Optionally, the inner wall of the rotating cap is provided with an inner gear ring which is meshed with the transmission gear.

Optionally, the outer wall of the threaded sleeve is further provided with a limiting boss, the handle shell is correspondingly provided with a limiting groove, and the limiting boss is clamped with the limiting groove.

Optionally, the threaded rod is further provided with a limiting groove, and the inner wall of the handle shell is further correspondingly provided with a limiting part which is matched with the limiting groove of the threaded rod.

Optionally, the handle shell is further provided with a threaded rod support structure.

Optionally, the rotatable cap is a detachable halved structure.

Optionally, the bend adjusting assembly further comprises a roller for changing a path of the first wire to avoid interference.

The utility model has the technical effects that:

according to the novel adjustable bent guide sheath provided by the utility model, the rotating cap is arranged at the rear end of the operating handle, so that the left-hand and single-hand operation can be completely realized, and the habit of double-hand labor division operation in the conventional fixed bent sheath operation is completely met. By using the novel adjustable bending guide sheath, the learning and adaptation curve of the fixed bending sheath to the adjustable bending sheath can be obviously shortened, the division of labor by two hands is clear, the operation is fine, and the operation efficiency and the operation success rate can be further improved, so that the experience and prognosis of a patient are improved, the medical expense is reduced, and the burden of the patient, a family and the society is lightened.

Drawings

Fig. 1 is a schematic external structural view of an adjustable bending introducer sheath device according to the present invention.

Fig. 2 is a schematic view of the internal structure of an adjustable bending introducer sheath device according to the present invention.

Fig. 3 is a sectional view taken along the line a-a of fig. 1.

Fig. 4 is an isometric view of fig. 2.

Fig. 5 is a schematic structural diagram of a rotating cap of an adjustable bending introducer sheath device according to the present invention.

Fig. 6 is a sectional view in the direction B-B (gear transmission structure) of fig. 1.

Fig. 7 is a schematic view of the conduction gear of an adjustable bending introducer sheath device of the present invention in an assembled position on the handle housing.

The attached drawings are as follows:

sheath tube 10

Handle shell 20

Positioning groove 21

Annular groove 22

Limiting groove 23

Stopper 24

Threaded rod support structure 25

Rotary cap 31

Ring gear 311

Rotating cap snap 312

Threaded rod 32

Limiting groove 321

Stay wire fixing groove 322

External thread 323

Threaded sleeve 33

Internal thread 331

External gear 332

Limiting boss 333

Drive gear 34

Pin 341

Fixed pulley 41

First pull wire 42

Second stay 43

Roller 44

Hemostasis valve 1

Hemostatic valve joint 2

A three-way switch 3.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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

For convenience of describing the handle structure, it is specified herein that the end of the sheath tube from which the sheath tube extends is the front end of the handle, and the end to which the rotating cap is fitted is the rear end of the handle.

As shown in fig. 1 to 4, an adjustable bending introducer sheath device according to the present invention comprises: sheath pipe 10, handle shell 20, rotating assembly and accent curved subassembly.

The sheath tube 10 is sleeved in the handle shell 20, and the front end of the sheath tube extends out of the handle shell 20; the rear end of the sheath tube 10 is connected with the hemostatic valve 1; the hemostatic valve joint 2 is fixed, and the hemostatic valve joint 2 is fixedly connected in a positioning groove 21 at the rear end of the handle shell 20, so that the sheath tube 10 and the hemostatic valve 1 cannot rotate or axially move relative to the handle shell 20. The hemostatic valve connector 2 is also connected with a three-way switch 3 which can be used for operations such as suction, injection and the like.

The rotating assembly comprises: a rotating cap 31 sleeved outside the rear end of the handle shell 20, and a threaded rod 32 arranged in the handle shell, wherein the threaded rod 32 is driven by the rotation of the rotating cap 31 to translate along the longitudinal direction of the sheath tube.

As shown in fig. 2, the bend adjusting assembly includes: at least a fixed pulley 41, and a first pulling wire 42 and a second pulling wire 43 which are oppositely arranged at two sides of the sheath tube 10. One end of the first pull wire 42 is fixed on the sheath tube 10, and the other end thereof passes around the fixed pulley 41, and is fixed with the threaded rod 32 after the direction is changed by the fixed pulley 41. When the threaded rod 32 moves to the left, interference with the first pull wire 42 may occur, which affects the accuracy of the bending. To address this problem, in some examples, a roller 44 may be provided to change the path of the first wire 42 to avoid interference. One end of the second pull wire 43 is fixed on the sheath tube 10, and the other end is directly fixed on the threaded rod 32. In some embodiments, a pull-wire fixing groove 322 may be respectively disposed on both sides of the threaded rod 32 for respectively fixing the first pull wire 42 and the second pull wire 43. When the threaded rod 32 is driven by the rotating cap 31 to rotate in the first direction and translate towards the front end of the sheath tube, the second pull wire 43 is loosened, the first pull wire 42 is tightened, and the sheath tube bends towards the first pull wire 42, so that bending adjustment is realized; when the threaded rod 32 is driven by the rotation of the rotating cap 31 in the second direction to translate towards the rear end of the sheath tube 10, the first pull wire 42 is loosened, the second pull wire 43 is tightened, and the sheath tube bends towards the second pull wire 43, so that the bending is realized. The first direction and the second direction can be selected to be clockwise or anticlockwise.

In some embodiments, as shown in fig. 3, the rotating assembly further comprises: a threaded sleeve 33 mounted within the handle housing 20. By way of example, an annular recess 22 for receiving a threaded sleeve 33 (this recess is for receiving the threaded sleeve and is referred to as a threaded sleeve and therefore not designated as a boss) is provided in the handle housing 20, so that the threaded sleeve 33 can rotate freely coaxially with the handle housing 20 within the annular recess 22. Further, an annular limiting groove 23 is further formed in the handle shell 20 in the circumferential direction, an annular limiting boss 333 is arranged on the outer wall of the threaded sleeve 33 in the circumferential direction, the annular limiting boss 333 is matched with the limiting groove 23 of the handle shell 20, and in the installation state, the threaded sleeve 33 can be clamped in the limiting groove 23, namely, the limiting boss 333 is clamped through the limiting groove 23, so that the threaded sleeve 33 cannot move along the axial direction of the sheath tube, and the threaded sleeve 33 is limited in the axial direction (as shown in fig. 2). According to the handle bending adjusting principle, the threaded sleeve 33 rotates to drive the threaded rod 32 to move back and forth, and the threaded rod 32 drives the stay wire to realize bending adjustment. If the threaded sleeve can also move back and forth, the first mode cannot ensure the meshing with the transmission gear, the transmission fails, the bending adjustment cannot be realized, and the second mode can cause the threaded sleeve to move together with the threaded rod and cannot pull the pull line to perform the bending adjustment. The inner wall of the threaded sleeve 33 is further provided with an internal thread 331, the threaded rod 32 is sleeved in the threaded sleeve 33, and an external thread 323 is arranged on the threaded rod 32 and matched with the internal thread 331 of the threaded sleeve 33 to drive the front end of the threaded rod 32 to extend out of or retract into the threaded sleeve 33.

Direct transmission between the rotating cap 31 and the threaded sleeve 33 is not possible due to the intermediate barrier of the handle housing 20. To solve this problem, in this example, the inner wall of the rotating cap 31 is provided with an inner ring gear 311, as shown in fig. 5, and the handle case 20 is provided with a transmission gear 34 for connecting the transmission of the two parts of the rotating cap 31 and the threaded sleeve 33, as shown in fig. 6. The transmission gear 34 may be fixed to the handle housing 20 by a pin 341, and may rotate freely along the axis of the pin 341, but cannot move along the radial direction and the axial direction of the pin 341 (as shown in fig. 7), so as to ensure that the transmission gear 34 can be engaged with the inner gear 311 and the threaded sleeve 33 of the rotating cap 31 stably at the same time. In this example, as shown in fig. 6, the rear end of the outer wall of the threaded sleeve 33 is further provided with an external gear 332 which meshes with the transmission gear 34. When the rotating cap 31 is rotated, the inner gear ring 311 on the inner side of the rotating cap 31 rotates to drive the transmission gear 34 to rotate, and the rotation of the transmission gear 34 drives the threaded sleeve 33 to rotate (as shown in fig. 4 and 6); since the internal thread 331 of the threaded sleeve 33 is engaged with the external thread 323 of the threaded rod 32, when the threaded sleeve 33 is rotated, the threaded rod 32 is moved back and forth, i.e., the threaded sleeve 33 is extended or retracted, by the engagement of the threads.

Furthermore, the threaded rod 32 is further provided with a limiting groove 321, and the handle shell 20 is provided with a limiting part 24 which can be embedded into the limiting groove 321 of the threaded rod, so that the threaded rod can be prevented from rotating along with the threaded sleeve, and the range of the threaded rod moving back and forth can be limited.

The swivel cap 31 is detachably divided into two parts, is cylindrical after being assembled, and is assembled at the rear end of the handle case 20 through a swivel cap snap 312 (see fig. 4) to be freely rotatable, as shown in fig. 5.

In some embodiments, a threaded rod support structure 25, as shown in FIG. 3, is also provided within the handle housing 20 to ensure smooth movement of the threaded rod 32.

In summary, the structure of the adjustable bending guide sheath with the rear rotating mechanism provided by the utility model comprises a sheath tube, a handle shell, a rotating cap, a transmission gear, a pin shaft, a threaded sleeve, a threaded rod, a pulley and the like, the bending shape of the head end of the sheath tube can be controlled by rotating the rotating cap at the rear end of the handle, and the adjustable bending sheath tube and the ablation catheter can be conveniently operated when a doctor performs an operation.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the utility model. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the utility model should be limited only by the attached claims.

Claims

1. An adjustable bend introducer sheath apparatus, comprising: the sheath tube, the handle shell, the rotating assembly and the bending adjusting assembly;

the bend adjusting component comprises: at least a fixed pulley, a first pull wire and a second pull wire which are oppositely arranged at two sides of the sheath tube; one end of the first pull wire is fixed on the sheath tube, and the other end of the first pull wire bypasses the fixed pulley and is fixed with the threaded rod; one end of the second stay wire is fixed on the sheath tube, and the other end of the second stay wire is directly fixed on the threaded rod.

2. The adjustable bend introducer sheath apparatus of claim 1, wherein the rotation assembly further comprises: the threaded sleeve is sleeved on the inner wall of the handle shell, the threaded rod is sleeved in the threaded sleeve, and the inner wall of the threaded sleeve is provided with internal threads which are in threaded fit with the threaded rod.

3. The adjustable bend introducer sheath apparatus of claim 2, wherein the rotation assembly further comprises: the transmission gear is fixed in the handle shell, is positioned between the threaded sleeve and the rotating cap, and is respectively meshed with the threaded sleeve and the rotating cap; the outer wall of the threaded sleeve is also provided with an outer gear which is meshed with the transmission gear.

4. The adjustable bend introducer sheath apparatus of claim 3, wherein the drive gear is secured within the handle housing by a pin, the drive gear spinning about the pin.

5. The adjustable bend introducer sheath device of claim 3, wherein the inner wall of the rotatable cap is provided with an internal gear ring which is engaged with the transmission gear.

6. The adjustable bending introducer sheath device as claimed in claim 2, wherein the outer wall of the threaded sleeve is further provided with a limit boss, the handle housing is correspondingly provided with a limit groove, and the limit boss is in snap fit with the limit groove.

7. The adjustable-bend introducer sheath device as claimed in claim 1, wherein the threaded rod is further provided with a limiting groove, and the inner wall of the handle housing is correspondingly provided with a limiting portion which is matched with the limiting groove of the threaded rod.

8. The adjustable bend introducer sheath apparatus of claim 1, wherein the handle housing is further provided with a threaded rod support structure.

9. The adjustable bend introducer sheath apparatus of claim 1, wherein the rotatable cap is a detachable split structure.

10. The adjustable bend introducer sheath apparatus of claim 1, wherein the bend adjustment assembly further comprises a roller for changing the path of the first pull wire.