阅读说明：本技术 一种可调弯鞘管及下腔静脉滤器输送装置 (Adjustable bent sheath tube and inferior vena cava filter conveying device ) 是由 来志超 于 2019-09-11 设计创作，主要内容包括：本发明公开的技术方案涉及一种可调弯鞘管及下腔静脉滤器输送装置。一种可调弯鞘管包括鞘管管体、调节丝和调节器,其中,鞘管管体为柔性材料,其进入体内后在导丝的作用下可随血管走向弯曲；鞘管管体的近端外露于体外且与调节器固定连接；鞘管管体的管壁夹层内设有沿其长度方向贯通的通道,调节丝从通道的近端穿入,到达通道的远端并与设置在鞘管管体中段的固定段固定,调节丝沿固定段的长度与之整段固定,固定段在自然状态下呈直线状态；调节丝的近端与调节器的调节单元连接,调节丝在调节单元的拉动下使固定段整体偏斜一个角度。本发明的技术方案有助于使腔静脉滤器释放时获得最佳的固定位置。(The invention discloses a technical scheme and relates to a conveying device for an adjustable bent sheath tube and a lower vena cava filter. An adjustable bending sheath tube comprises a sheath tube body, an adjusting wire and an adjuster, wherein the sheath tube body is made of flexible materials and can be bent along with the trend of a blood vessel under the action of the guide wire after entering the body; the near end of the sheath tube body is exposed outside the body and is fixedly connected with the regulator; a channel which is through along the length direction is arranged in the pipe wall interlayer of the sheath pipe body, the adjusting wire penetrates from the near end of the channel, reaches the far end of the channel and is fixed with a fixing section arranged at the middle section of the sheath pipe body, the adjusting wire is fixed with the whole section along the length of the fixing section, and the fixing section is in a linear state under a natural state; the proximal end of the adjusting wire is connected with an adjusting unit of the adjuster, and the adjusting wire enables the fixing section to integrally deflect at an angle under the pulling of the adjusting unit. The solution of the invention helps to obtain an optimal fixation position when the vena cava filter is released.)

1. An adjustable bending sheath tube is characterized by comprising a sheath tube body, an adjusting wire and an adjuster, wherein,

the sheath tube body is made of flexible material and can be bent along with the trend of the blood vessel under the action of the guide wire after entering the body; the proximal end of the sheath tube body is exposed outside the body and is fixedly connected with the regulator;

a channel which is through along the length direction of the sheath tube body is arranged in the tube wall interlayer of the sheath tube body, the adjusting wire penetrates from the near end of the channel, reaches the far end of the channel and is fixed with a fixing section arranged at the far end of the sheath tube body, and the adjusting wire is fixed with the whole section along the length of the fixing section, so that the fixing section is in a linear state in a natural state;

the proximal end of the adjusting wire is connected with an adjusting unit of the adjuster, and the adjusting wire enables the fixing section to integrally deflect at an angle under the pulling of the adjusting unit.

2. The adjustable bending sheath of claim 1, wherein the number of the adjusting wires is two or more, and the adjusting wires are symmetrically distributed in the wall of the sheath along the cross-sectional center of the sheath.

3. The adjustable bend sheath of claim 1 or 2, further comprising a connector comprising at least three passageways in communication with each other; wherein, first passageway with the sheath pipe body is connected, the second passageway with the regulator is connected, the regulation silk from the first passageway get into the second passageway and with the regulation unit is connected.

4. The tunable bending sheath of claim 3, wherein the first, second and third passageways form a Y-shaped or T-shaped configuration.

5. The adjustable bend sheath of claim 1, wherein the adjuster is manually or automatically controlled.

6. The adjustable bend sheath of claim 1, wherein the adjuster comprises a self-locking device.

7. An inferior vena cava filter delivery device comprising the deflectable sheath of any of claims 1-6, a filter, and a filter release unit; the filter releasing unit carries the filter from the lumen of the adjustable bending sheath tube to the body along the direction from the proximal end to the distal end and releases the filter.

8. The inferior vena cava filter delivery device according to claim 7, wherein the filter further comprises a retrieval hook disposed at a trailing end of the filter.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a conveying device for an adjustable bent sheath tube and a lower vena cava filter.

Background

Pulmonary artery embolism (pulmonary embolism) is a series of clinical pathophysiological changes mainly caused by pulmonary circulation dysfunction, and sudden death is caused seriously because peripheral deep vein thrombosis or thrombosis in the right heart cavity falls off to enter pulmonary circulation to block the pulmonary artery or branches of the pulmonary artery. Research shows that embolus causing PE is mainly derived from thrombus falling off from deep limb veins or pelvic veins and accounts for 60-90% of the source of the embolus. Therefore, deep venous thrombosis becomes a common disease which endangers human health, the incidence rate increases year by year, and important complications are repeated thrombus falling, so that pulmonary artery embolism and pulmonary infarction are caused, the death rate is extremely high, and the life of a patient is seriously threatened. The traditional operation treatment is adopted, the wound surface is large, the risk is high, the interventional therapy is adopted in recent years, the percutaneous inferior vena cava filter implantation adopts a percutaneous puncture method, a metal filter is placed in the inferior vena cava through a sheath pipe conveyor, and the filter can prevent thrombus from ascending and prevent or reduce pulmonary artery thromboembolism. Compared with the traditional surgical operation, the percutaneous inferior vena cava filter placement is simple, safe and effective, and has been widely adopted in recent years.

In the minimally invasive interventional procedures, a medical sheath is usually used to establish a conveying channel from the outside to the inside of the body of the vena cava filter. The sheath pipes for conveying the vena cava filter, which are clinically put into use at present, are all linear, when the sheath pipes run in blood vessels, the sheath pipes are subjected to the acting force of the blood vessels due to the natural physiological bending of the blood vessels, so that the distal ends of the sheath pipes cannot be positioned in the centers of the vena cava, and when the filter is released, the filter cannot be accurately released along the long axis of the vena cava, so that the filter is possibly fixed and unstable, and further, the complications such as later-stage filter displacement, wall attachment, vein wall puncture and the like are caused. If the direction of the distal end of the sheath tube can be adjusted and controlled in the filter conveying process, the sheath tube can be accurately positioned in the long axis direction of the vena cava after being moved to a target position, the success rate of filter release can be effectively increased, and the complication incidence rate is reduced.

Disclosure of Invention

The invention aims to provide an adjustable bent sheath tube and a lower vena cava filter conveying device, which can release a filter at the position of the central line of the long axis of a lower vena cava, thereby improving the safety and effectiveness of filter release.

In order to achieve the above purpose, the invention mainly provides the following technical scheme:

on one hand, the invention provides an adjustable bending sheath tube, which comprises a sheath tube body, an adjusting wire and an adjuster,

the sheath tube body is made of flexible material and can be bent along with the trend of the blood vessel under the action of the guide wire after entering the body; the proximal end of the sheath tube body is exposed outside the body and is fixedly connected with the regulator;

a channel which is through along the length direction of the sheath tube body is arranged in the tube wall interlayer of the sheath tube body, the adjusting wire penetrates from the near end of the channel, reaches the far end of the channel and is fixed with a fixing section arranged at the far end of the sheath tube body, the adjusting wire is fixed with the whole section along the length of the fixing section, and the fixing section is in a linear state in a natural state;

the proximal end of the adjusting wire is connected with an adjusting unit of the adjuster, and the adjusting wire enables the fixing section to integrally deflect at an angle under the pulling of the adjusting unit.

Preferably, the number of the adjusting wires is more than two, and the adjusting wires are symmetrically distributed in the tube wall of the sheath tube body along the center of the cross section of the sheath tube body.

Preferably, the connector comprises at least three passages which are communicated with each other; wherein, first passageway with the sheath pipe body is connected, the second passageway with the regulator is connected, the regulation silk from the first passageway get into the second passageway and with the regulation unit is connected.

Preferably, the first, second and third vias form a Y-or T-shaped structure.

Preferably, the regulator is manually or automatically controlled.

Preferably, the regulator comprises a self-locking device.

In another aspect, the present invention also provides an inferior vena cava filter delivery device comprising the aforementioned curvable sheath, a filter, and a filter release unit; the filter releasing unit carries the filter from the lumen of the adjustable bending sheath tube to the body along the direction from the proximal end to the distal end and releases the filter.

Preferably, the strainer further comprises a recovery hook provided at a tail end of the strainer.

Has the advantages that:

according to the technical scheme, the channel which is through along the length direction of the channel is arranged in the tube wall interlayer of the sheath tube body, the adjusting wire penetrates through the near end of the channel, reaches the far end of the channel and is fixed with the fixing section arranged at the far end of the sheath tube body, the adjusting wire is fixed with the whole section of the fixing section along the length of the fixing section, the fixing section is a section of straight line section and is different from one point, when the adjusting wire is fixed with the whole fixing section, the fixing section is still in a straight line state in a natural state, and meanwhile, the near end of the adjusting wire is connected with the adjusting unit of the adjuster, the adjusting wire can enable the whole fixing section to deviate from other sheath tube parts connected with the fixing section at an angle under the pulling of the adjusting unit, so that the sheath tube body can be positioned at a position which is bent upwards at the junction of the left and right iliac veins and then reaches the lower vena cava for vein release filter when the sheath tube body is positioned at a position which is flat The line condition thus ensures that the filter is positioned in the correct orientation after being released, allowing the optimum position of attachment to be achieved when the vena cava filter is released.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic view of an overall structure of an adjustable bending sheath according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of an adjustable sheath according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another implementation manner of an adjustable bending sheath according to an embodiment of the present invention;

FIG. 4 is a schematic view of the disassembled structure of FIG. 3;

FIG. 5 is a view of the structure of FIG. 3 with the anchor segments tilted under tension;

fig. 6 is a schematic diagram illustrating an application of an adjustable bending sheath according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an inferior vena cava filter delivery device according to another embodiment of the present invention.

The reference numbers are as follows:

a sheath tube body 10, a channel 11 and a fixed section 12; an adjusting wire 20; the device comprises a regulator 30, a regulating unit 31, a guide groove 32, a rotary cylinder 33, an end cover 34, a support 35 and a scale 331; a connector 40, a first passage 41, a second passage 42, and a third passage 43; a filter 1; the sheath tube 2 can be bent in an adjustable way; a filter release unit 3; the hook 4 is recovered.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.