CN104546054A - Adjustable plugging device and release method - Google Patents

Abstract

The invention provides an adjustable blocking device and a release method. The blocking device includes a blocking device and a push rod. The blocking device includes an upper disk and a lower disk, and an elastic Connector, the lower disc is provided with a lower disc ligation sleeve, the movable end of the elastic connector passes through the lower disc ligation sleeve and is detachably connected with the push rod, and the push rod pulls the elastic connector along the axial direction to adjust the elastic connector The length between the upper and lower platters. The adjustable blocking device and release method achieve the purpose of adjusting the clamping force between the upper disk and the lower disk by adjusting the length of the elastic connecting piece between the upper disk and the lower disk, so that the blocking device It is more stable and firm, fits better with the lesion position, and can adapt to lesions of different sizes and lengths. At the same time, the adjustable occlusion device can be recovered and released so that it can be corrected when an accident occurs in the operation, reducing the risk of surgery and operation. difficulty.

Description

Adjustable blocking device and release method

technical field

The invention relates to an adjustable blocking device.

The invention also relates to a method for releasing the adjustable blocking device.

Background technique

Congenital heart disease is mainly caused by incomplete closure of the intracardiac septum during the embryonic period of infants and young children. For this defect-type lesion, the current treatment method is mainly closed treatment, including surgical suture treatment and interventional closure treatment.

In occlusion treatment, the commonly used occlusion devices are mushroom umbrella occluders or coils, but mushroom umbrella occluders are difficult to control in terms of clamping force, while spring coils can control clamping force, but Not suitable for large defect lesions. Some existing designs use spring connection instead of the traditional NiTi alloy mesh connection between the plugging disks, but the length of the spring is fixed, and the clamping force is also fixed, so that the compression of the disk on the periphery of the defect cannot be adjusted. When applied to some special lesions such as ventricular septal defect, it will cause compression edema, and in severe cases, it will cause third-degree conduction block (the only treatment is to carry a pacemaker for life).

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an adjustable blocking device and a release method to solve the problem in the prior art that the clamping force of the blocking device is difficult to control and cannot be adjusted.

In order to achieve the above purpose and other related purposes, the present invention provides an adjustable occlusion device, the occlusion device includes an occluder and a push rod, the occluder includes an upper disk and a lower disk, the upper disk, the lower disk The disc is woven by shape memory wire mesh. There is an elastic connector between the upper disc and the lower disc. The elastic connector is provided with a fixed end fixed to the upper disc and a movable end passing through the lower disc. There is a lower disc ligation sleeve under the disc, and the movable end of the elastic connector is detachably connected with the push rod through the lower disc ligation sleeve; the push rod pulls the elastic connector along the axial direction, and adjusts the elastic connector on the upper disc. and the length between the lower disc; when the push rod is separated from the elastic connector, the relative position of the movable end of the elastic connector and the lower disc ligation sleeve remains unchanged.

Preferably, the push rod includes a push rod shell and a push rod inner core, the push rod inner core moves or rotates along the axis in the inner chamber of the push rod shell, the end of the push rod shell is detachably connected to the lower disc ligation sleeve, and the push rod The end of the rod inner core is detachably connected to the movable end of the elastic connector.

Further preferably, the end of the push rod housing is threadedly connected to the lower disk ligature sleeve.

Further preferably, the end of the inner core of the push rod is threadedly connected to the movable end of the elastic connector or connected through a clip.

Preferably, the elastic connecting member is a spring.

Further preferably, the movable end of the spring is provided with a spring limiting head, and the outer diameter of the spring limiting head is larger than the inner diameter of the lower disc ligation sleeve.

Further preferably, the spring is a cylindrical standard spring, square spring, elliptical spring or conical spring.

Preferably, the elastic connector is a tubular mesh braided structure, and the tubular mesh braided structure is braided by shape memory wires.

Further preferably, the movable end of the tubular mesh braided structure is provided with a braided structure ligation sleeve, the braided structure ligation sleeve can be inserted into the lower disc ligation sleeve through the lower disc, and the braided structure ligation sleeve is away from the bottom of the tubular mesh braided structure. One end is provided with a ligation sleeve limiting head, the outer diameter of the ligation sleeve limiting head is larger than the inner diameter of the lower disc ligation sleeve, and the end of the tubular mesh braided structure close to the braided structure ligation sleeve is provided with an extension wing extending radially , the outer diameter of the stretched wings is greater than the inner diameter of the lower disc ligature sleeve.

In order to achieve the above purpose and other related purposes, the present invention also provides a release method using the above adjustable occlusion device, comprising the following steps:

1) Connect the push rod to the occluder, pull the push rod, and pull the occluder into the delivery sheath;

2) Send the occluder to the lesion position through the delivery sheath;

3) Push the push rod shell to release the upper disc;

4) Simultaneously push the outer shell of the push rod and the inner core of the push rod to release the elastic connector;

5) Keep the inner core of the push rod still, push the outer shell of the push rod, and release the lower disc part;

6) Separate the push rod shell from the lower disc ligation sleeve;

7) Observe whether the occluder is stable and firm, and if necessary, adjust the length of the elastic connector between the upper disc and the lower disc;

8) Pull back the outer shell of the push rod, and the inner core of the push rod and the elastic connector are exposed and completely released;

9) Separate the inner core of the push rod from the movable end of the elastic connector.

Preferably, said step 1) comprises the following steps:

① Connect the movable end of the elastic connector to the end of the inner core of the push rod;

② Pull the inner core of the push rod together with the movable end of the elastic connector into the outer shell of the push rod;

③Fixly connect the push rod shell with the lower disc ligation sleeve;

④The inner core of the push rod and the movable end of the elastic connector move or rotate along the axis in the cavity of the push rod shell to adjust the length of the elastic connector between the upper disc and the lower disc;

⑤ Pull the push rod to pull the occluder into the delivery sheath.

Preferably, the process of adjusting the length of the elastic connector between the upper disk and the lower disk in step 7) includes the following steps:

①Push the push rod shell forward, so that the push rod inner core and the elastic connector are recovered into the inner cavity of the push rod shell;

②Fixly connect the push rod shell with the lower disc ligation sleeve;

③Move or rotate the inner core of the push rod and the movable end of the elastic connector along the axis in the cavity of the push rod shell, and adjust the length of the elastic connector between the upper disc and the lower disc;

④ Separate the push rod shell from the lower disc ligation sleeve.

As mentioned above, the adjustable blocking device and release method of the present invention have the following beneficial effects:

The adjustable blocking device and release method achieve the purpose of adjusting the clamping force between the upper disk and the lower disk by adjusting the length of the elastic connecting piece between the upper disk and the lower disk, so that the blocking device It is more stable and firm, fits better with the lesion position, and can adapt to lesions of different sizes and lengths. At the same time, the adjustable occlusion device can be recovered and released so that it can be corrected when an accident occurs in the operation, reducing the risk of surgery and operation. difficulty.

Description of drawings

Fig. 1 is a schematic structural diagram of the adjustable blocking device of the present invention.

Fig. 2 is a schematic structural diagram of a first embodiment of the occluder of the adjustable occlusion device shown in Fig. 1 .

Fig. 3 is a schematic structural diagram of a second embodiment of the occluder of the adjustable occlusion device shown in Fig. 1 .

Fig. 4 is a schematic structural diagram of a third embodiment of the occluder of the adjustable occlusion device shown in Fig. 1 .

Fig. 5 is a schematic structural diagram of a fourth embodiment of the occluder of the adjustable occlusion device shown in Fig. 1 .

Fig. 6 is a schematic structural diagram of a fifth embodiment of the occluder of the adjustable occlusion device shown in Fig. 1 .

Fig. 7a to Fig. 7b are schematic structural diagrams of a sixth embodiment of the occluder of the adjustable occlusion device shown in Fig. 1 .

Fig. 8a to Fig. 8b are schematic structural diagrams of a seventh embodiment of the occluder of the adjustable occlusion device shown in Fig. 1 .

Fig. 9a to Fig. 9f are schematic diagrams showing the structure of the first embodiment of the push rod of the adjustable blocking device shown in Fig. 1 .

Fig. 10 is a schematic structural diagram of a second embodiment of the push rod of the adjustable blocking device shown in Fig. 1 .

Component designation description

1 occluder

11 Upper platter

12 Lower platter

121 Lower disc ligation set

13 Elastic connectors

131 spring

132 Spring limit head

133 Tubular mesh braided structure

134 Braided structure ligature set

135 Ligation sets limit the head

136 Extended Wings

14 Waist

2 push lever

21 Push lever housing

22 Push rod inner core

23 Clips

3 Delivery sheath

Detailed ways

The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

See Figures 1 through 10. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.

As shown in Figures 1 to 10, the present invention provides an adjustable occlusion device, the occlusion device includes an occluder 1 and a push rod 2, the occluder 1 includes an upper disk 11 and a lower disk 12, the upper The disc 11 and the lower disc 12 are made of shape-memory wire mesh weaving. An elastic connector 13 is arranged between the upper disc 11 and the lower disc 12. end and the movable end passing through the lower disc 12, the lower disc 12 is provided with a lower disc ligation sleeve 121, and the movable end of the elastic connector 13 passes through the lower disc ligation sleeve 121 and is detachably connected with the push rod 2; The push rod 2 axially pulls the elastic connector 13 to adjust the length of the elastic connector 13 between the upper disk 11 and the lower disk 12; when the push rod 2 is separated from the elastic connector 13, the movable end of the elastic connector 13 The relative position with the lower disc ligation sleeve 121 remains unchanged. The above-mentioned blocking device pulls the elastic connecting piece 13 in the axial direction through the push rod 2 to adjust the length of the elastic connecting piece 13 between the upper disk 11 and the lower disk 12, thereby adjusting the distance between the upper disk 11 and the lower disk 12. The clamping force between them makes the occlusion device more stable and firm, and fits better with the lesion position, and can adapt to lesions of different sizes and lengths.

As shown in FIGS. 2 to 6 , the elastic connecting member 13 is a spring 131 . Wherein, the movable end of the spring 131 is provided with a spring limiting head 132 , and the outer diameter of the spring limiting head 132 is larger than the inner diameter of the lower disc ligation sleeve 121 . The spring limiting head 132 is used to connect the spring 131 and the push rod 2 , and at the same time, when the push rod 2 is separated from the spring 131 , the spring 131 will not retract into the lower disc ligation sleeve 121 .

As shown in FIG. 2 , the upper disk 11 and the lower disk 12 are connected not only by the spring 131 but also by the waist 14 . The waist 14 is braided by shape-memory wire mesh and surrounds the spring 131 in the middle. This design makes when adjusting the distance between the upper disc 11 and the lower disc 12, both the clamping force between the upper disc 11 and the lower disc 12 has been adjusted, and the diameter of the waist 14 has been adjusted, increasing the The waist 14 is fixed for stability at the lesion position.

As shown in Figures 2 to 6, the spring 131 can be a cylindrical standard spring, a square spring, an elliptical spring or a conical spring and other springs of various shapes, which can adapt to different forms of lesions and have wider adaptability.

As shown in FIGS. 7 a to 8 b , the elastic connector 13 is a tubular mesh-like braided structure 133 , and the tubular mesh-like braided structure 133 is braided by shape memory wires. Wherein, the movable end of tubular network braided structure 133 is provided with braided structure ligation sheath 134, and braided structure ligation sheath 134 can be inserted in the lower disc ligation sheath 121 through lower disk 12, and braided structure ligation sheath 134 is far away from tubular net One end of the shape braided structure 133 is provided with a ligation sheath limiting head 135, the outer diameter of the ligation sheath limiting head 135 is larger than the inner diameter of the lower plate ligation sheath 121, and the tubular reticular weaving structure 133 is close to the braided structure ligation sheath 134 One end is provided with a stretching wing 136 extending radially, and the outer diameter of the stretching wing 136 is larger than the inner diameter of the lower disc ligation sleeve 121 .

As shown in Figure 7a and Figure 8a, the extension wing 136 is located between the upper disk 11 and the lower disk 12, when the clamping force between the upper disk 11 and the lower disk 12 needs to be adjusted, The braided structure ligature 134 and the extension wings 136 are pulled out to the outside through the lower disk ligature 121. Since the extension wings 136 are woven from shape-memory wire mesh, when the extension wings 136 are pulled out to the lower disk ligature 121 After the outside, the stretching wings 136 are released and unfolded into the originally set shape, which prevents the possibility that the braided structure ligature 134 will return to the lower disc ligature 121 again; As shown in FIG. 8 b , the distance between the upper disc 11 and the lower disc 12 has changed compared with before, thereby adjusting the clamping force between the upper disc 11 and the lower disc 12 .

As shown in Figures 9a to 10, the push rod 2 includes a push rod shell 21 and a push rod inner core 22, the push rod inner core 22 moves or rotates along the axis in the inner cavity of the push rod shell 21, and the end of the push rod shell 21 The upper part is detachably connected with the lower disc ligation sleeve 121, and the end of the push rod inner core 22 is detachably connected with the movable end of the elastic connector 13. Wherein, the end of the push rod housing 21 is screwed to the lower disc ligation sleeve 121 . As shown in Figures 9a to 9f, the end of the push rod inner core 22 is connected to the movable end of the elastic connector 13 through a clip 23; as shown in Figure 10, the end of the push rod inner core 22 is connected to the elastic connector 13 The active end threaded connection.

The release method using the above-mentioned adjustable blocking device mainly includes the following steps:

1) Connect the push rod 2 to the occluder 1, pull the push rod 2, and pull the occluder 1 into the delivery sheath 3, which specifically includes the following steps,

①Connect the movable end of the elastic connector 13 to the end of the inner core 22 of the push rod, as shown in Figure 9a to Figure 9c, the movable end of the elastic connector 13 is connected to the end of the inner core 22 of the push rod through a clip 23 , the movable end of the elastic connector 13 shown in Figure 10 is threadedly connected to the end of the push rod inner core 22;

② Pull the inner core 22 of the push rod together with the movable end of the elastic connector 13 into the outer shell 21 of the push rod, as shown in Figure 9d;

③Fixly connect the push rod housing 21 with the lower disc ligation sleeve 121, as shown in Figure 9d;

④ The push rod inner core 22 together with the movable end of the elastic connector 13 moves or rotates along the axis in the cavity of the push rod shell 21 to adjust the length of the elastic connector 13 between the upper disk 11 and the lower disk 12, As shown in Figure 9e;

⑤ Pull the push rod 2 to pull the occluder 1 into the delivery sheath 3;

2) Send the occluder 1 to the lesion position by delivering the sheath tube 3;

3) Push the push lever housing 21 to release the upper disc 11;

4) Simultaneously push the push rod shell 21 and the push rod inner core 22 to release the elastic connector 13;

5) The inner core 22 of the push rod remains motionless, the outer shell 21 of the push rod is pushed, and the lower disc 12 is partially released;

6) separating the push rod housing 21 from the lower disc ligation sleeve 121;

7) Observe whether the occluder 1 is stable and firm. If necessary, adjust the length of the elastic connector 13 between the upper disc 11 and the lower disc 12; wherein, adjust the elastic connector 13 between the upper disc 11 and the lower disc. The process of length between pieces 12 includes the following steps,

① Push the push rod shell 21 forward, so that the push rod inner core 22 and the elastic connector 13 are recovered into the inner cavity of the push rod shell 21;

②Fixly connect the push rod housing 21 with the lower disc ligation sleeve 121;

③ Move or rotate the push rod inner core 22 and the movable end of the elastic connector 13 along the axis in the cavity of the push rod shell 21, and adjust the length of the elastic connector 13 between the upper disc 11 and the lower disc 12 ;

④ Separate the push rod housing 21 from the lower disc ligation sleeve 121 .

8) Withdrawing the push rod shell 21, the push rod inner core 22 and the elastic connector 13 are exposed and completely released;

9) Separate the push rod inner core 22 from the movable end of the elastic connector 13. At this time, if the elastic connector 13 is a spring 131 as shown in FIG. Automatic curling, and will not be retracted into the lower disc ligation sleeve 121. If the elastic connector 13 is a tubular mesh weaving structure 133 as shown in FIG. Possibility of retraction.

In the above method, if the occluder 1 is shown in FIG. 2 , when the elastic connecting member 13 is released or retracted, the waist 14 is also released or retracted.

In summary, the adjustable blocking device and release method of the present invention can adjust the clamping force between the upper disk and the lower disk by adjusting the length of the elastic connecting piece between the upper disk and the lower disk. Purpose: To make the occlusion device more stable and firm, fit better with the lesion, and can adapt to lesions of different sizes and lengths. At the same time, the adjustable occlusion device can be recovered and released so that it can be corrected when an accident occurs during surgery, reducing the risk of injury. Surgical risk and difficulty of operation. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (12)

1. an adjustable plugging device, it is characterized in that: described plugging device comprises stopper (1) and push rod (2), described stopper (1) comprises disc (11) and lower disc (12), described upper disc (11), lower disc (12) is woven by shape memory wire mesh shape and forms, Flexible Connector (13) is provided with between described upper disc (11) and lower disc (12), described Flexible Connector (13) is provided with the stiff end fixing with described upper disc (11) and the movable end through described lower disc (12), the below of described lower disc (12) is provided with lower disc ligation cover (121), the movable end of described Flexible Connector (13) removably connects through described lower disc ligation cover (121) and push rod (2), described push rod (2) pulls described Flexible Connector (13) vertically, regulates the length of described Flexible Connector (13) on described between disc (11) and lower disc (12), when described push rod (2) and Flexible Connector (13) depart from, the movable end of described Flexible Connector (13) and the relative position of described lower disc ligation cover (121) remain unchanged.

2. adjustable plugging device according to claim 1, it is characterized in that: described push rod (2) comprises push rod shell (21), push rod inner core (22), described push rod inner core (22) to be moved along axis at the interior intracavity of described push rod shell (21) or is rotated, end and the lower disc ligation cover (121) of described push rod shell (21) removably connect, and the end of described push rod inner core (22) and the movable end of Flexible Connector (13) removably connect.

3. adjustable plugging device according to claim 2, is characterized in that: the end of described push rod shell (21) is threaded with lower disc ligation cover (121).

4. adjustable plugging device according to claim 2, is characterized in that: the end of described push rod inner core (22) is threaded with the movable end of Flexible Connector (13) or is connected by clip (23).

5. adjustable plugging device according to claim 1, is characterized in that: described Flexible Connector (13) is spring (131).

6. adjustable plugging device according to claim 5, it is characterized in that: the movable end of described spring (131) is provided with spring retainer head (132), the external diameter of described spring retainer head (132) is greater than the internal diameter of described lower disc ligation cover (121).

7. adjustable plugging device according to claim 5, is characterized in that: described spring (131) is cylindric standard spring, square spring, double laminated spring or coniform spring.

8. adjustable plugging device according to claim 1, it is characterized in that: described Flexible Connector (13) is pipe type netted braiding structure (133), described pipe type netted braiding structure (133) is woven by shape memory wire mesh shape and forms.

9. adjustable plugging device according to claim 8, it is characterized in that: the movable end of described pipe type netted braiding structure (133) is provided with braiding structure ligation cover (134), described braiding structure ligation cover (134) can be inserted in lower disc ligation cover (121) through described lower disc (12), described braiding structure ligation cover (134) is provided with ligation away from one end of described pipe type netted braiding structure (133) and overlaps spacing head (135), the external diameter that spacing head (135) is overlapped in described ligation is greater than the internal diameter of described lower disc ligation cover (121), described pipe type netted braiding structure (133) is provided with near one end of described braiding structure ligation cover (134) the stretching, extension wing (136) radially stretched, the external diameter of the described stretching, extension wing (136) is greater than the internal diameter of described lower disc ligation cover (121).

10. use a method for releasing for the adjustable plugging device described in claim 2, it is characterized in that comprising the following steps:

1) described push rod (2) is connected with stopper (1), pulls described push rod (2), described stopper (1) is drawn in delivery sheath (3);

2) by described delivery sheath (3), described stopper (1) is delivered to lesion locations;

3) described push rod shell (21) is pushed, by described upper disc (11) release;

4) push described push rod shell (21) and push rod inner core (22), release Flexible Connector (13) simultaneously;

5) described push rod inner core (22) keeps motionless, pushes described push rod shell (21), the release of described lower disc (12) part;

6) described push rod shell (21) is separated with lower disc ligation cover (121);

7) observe described stopper (1) whether firmly stable, if necessary, regulate the length of described Flexible Connector (13) on described between disc (11) and lower disc (12);

8) draw back described push rod shell (21), described push rod inner core (22) and Flexible Connector (13) expose and discharge completely;

9) described push rod inner core (22) is separated with the movable end of Flexible Connector (13).

The method for releasing of 11. adjustable plugging devices according to claim 10, is characterized in that, described step 1) comprise the following steps:

1. the end of the movable end of described Flexible Connector (13) with push rod inner core (22) is connected;

2. described push rod inner core (22) is drawn in described push rod shell (21) together with the movable end of Flexible Connector (13);

3. described push rod shell (21) is fixedly connected with lower disc ligation cover (121);

4. described push rod inner core (22) is together with the movable end of Flexible Connector (13), move along axis in the cavity of described push rod shell (21) or rotate, regulating the length of described Flexible Connector (13) on described between disc (11) and lower disc (12);

5. pull described push rod (2), described stopper (1) is drawn in delivery sheath (3).

The method for releasing of 12. adjustable plugging devices according to claim 10, it is characterized in that, step 7) in regulate the process of the length of described Flexible Connector (13) on described between disc (11) and lower disc (12) to comprise the following steps: 1. push away front for described push rod shell (21), make described push rod inner core (22) and Flexible Connector (13) be recovered to the interior intracavity of described push rod shell (21);

2. described push rod shell (21) is fixedly connected with lower disc ligation cover (121);

3. the movable end of described push rod inner core (22) and Flexible Connector (13) moved along axis together or rotates in the cavity of described push rod shell (21), regulating the length of described Flexible Connector (13) on described between disc (11) and lower disc (12);

4. described push rod shell (21) is separated with lower disc ligation cover (121).