CN219126594U - Vascular sheath - Google Patents

Abstract

The present application provides a vascular sheath comprising: the device comprises an expander, an outer sheath tube, an anti-falling sheath and an elastic hanging lug; an anti-drop sheath is sleeved on the outer wall of the expander, and an outer sheath tube is sleeved on the outer wall of the anti-drop sheath; the elastic hanging lugs are arranged at the distal end of the anti-drop sheath; the outer sheath tube and the anti-drop sheath can slide relatively so as to shrink the elastic suspension lugs in the lumen of the outer sheath tube or release the elastic suspension lugs from the lumen of the outer sheath tube. After the vascular sheath is used for puncture, the release of the elastic hanging lugs can be realized by enabling the outer sheath tube and the anti-drop sheath to slide relatively, and the elastic hanging lugs can be hung against the puncture opening when in a release and unfolding state, so that the vascular sheath is prevented from falling off accidentally in the operation process. After the puncture is completed, the outer sheath tube and the anti-drop sheath can slide relatively, so that the elastic hanging lugs can be contracted, and the recovery is convenient.

Description

Vascular sheath

Technical Field

The utility model relates to the technical field of cardiovascular medical appliances, in particular to a vascular sheath.

Background

Heart valve disease is the most serious cardiovascular disease, surgical valve replacement or repair is still the standard treatment scheme, but most elderly patients often cannot accept traditional surgical chest opening surgery due to the reasons of advanced age, weak body, serious illness or contraindications, and the development of transcatheter or transapical valve technology brings good news to the patients.

In surgical intervention, either transapical or transatrial-spaced puncture techniques require the use of vascular sheaths to establish instrument passageways prior to instrument access. Although the outer side of a part of the vascular sheath is marked with scales to indicate how much of the sheath enters the heart, the doctor needs to perform related operation of the instrument through a three-dimensional or CT image in operation, and under the condition that the operator is mostly attracted by the image, the operator easily causes the sheath to fall off from the puncture opening, so that the serious bleeding is caused, and the puncture opening is punctured again to generate the adverse events such as interlayer, edema and the like.

Disclosure of Invention

Therefore, the utility model aims to solve the technical problem that the vascular sheath is easy to fall off in the existing cardiac surgical intervention technology, so as to provide the vascular sheath with the anti-falling function.

The vascular sheath provided by the utility model comprises: the device comprises an expander, an outer sheath tube, an anti-falling sheath and an elastic hanging lug; an anti-drop sheath is sleeved on the outer wall of the expander, and an outer sheath tube is sleeved on the outer wall of the anti-drop sheath; the elastic hanging lugs are arranged at the distal end of the anti-drop sheath; the outer sheath tube and the anti-drop sheath can slide relatively so as to shrink the elastic suspension lugs in the lumen of the outer sheath tube or release the elastic suspension lugs from the lumen of the outer sheath tube.

Further, the elastic hangers are a plurality of, and the elastic hangers are distributed along the circumferential direction of the anti-drop sheath.

Further, the elastic hanging lugs are strip-shaped rod bodies, one ends of the strip-shaped rod bodies are connected with the anti-drop sheaths, and the other ends of the strip-shaped rod bodies extend along the radial direction of the anti-drop sheaths.

Further, the other end of the strip-shaped rod body extends in a serpentine manner along the radial direction of the anti-drop sheath; a plurality of arc-shaped protruding parts are arranged on the snakelike strip-shaped rod body; the arc-shaped protruding portion close to the anti-drop sheath protrudes towards the distal end of the expander, and the arc-shaped protruding portion far away from one end of the anti-drop sheath protrudes towards the proximal end of the expander.

Further, one end of the strip-shaped rod body is connected with the end head of the distal end of the anti-drop sheath.

Further, the strip-shaped rod body and the anti-drop sheath are of an integrated structure.

Further, the elastic hanging lugs are made of metal or high-molecular elastic materials.

Further, the dilator includes a dilation catheter and a dilator seat; the outer wall of the expansion catheter is sleeved with the anti-drop sheath, and the expansion catheter can slide relative to the anti-drop sheath; the expander seat is arranged on the side wall of one end of the expansion catheter far away from the elastic hanging lug;

the outer sheath comprises a sealing sheath and a sealing sheath seat; the sealing sheath is sleeved on the outer wall of the anti-drop sheath; the sealing sheath seat is arranged on the side wall of one end of the sealing sheath tube far away from the elastic hanging lugs;

the anti-drop sheath comprises a connecting pipe and a sealing seat, the connecting pipe is sleeved on the outer wall of the expander, and the sealing seat is arranged on the side wall of the connecting pipe, which is far away from one end of the elastic hanging lug.

Further, the lengths of the outer sheath tube, the anti-drop sheath and the expander are sequentially increased.

The technical scheme of the utility model has the following advantages:

according to the vascular sheath provided by the utility model, after the vascular sheath is punctured at the apex of the heart or the atrial septum, the outer sheath tube and the anti-drop sheath relatively slide, so that the elastic hanging lugs can be released, and when the elastic hanging lugs are in a released and unfolded state, the elastic hanging lugs can be hung against the puncture opening, thereby preventing the vascular sheath from accidentally dropping in the operation process. After the puncture is completed, the outer sheath tube and the anti-drop sheath can slide relatively, so that the elastic hanging lugs can be contracted, and the recovery is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of the vascular sheath of the present application prior to use.

Fig. 2 is a schematic structural view of the vascular sheath after release of the elastic suspension loop.

Fig. 3 is a schematic view of the structure of the vessel sheath dilator after withdrawal.

Fig. 4a-4d are schematic views of the vascular sheath use procedure of the present application.

Reference numerals:

001. an aortic valve; 002. a mitral valve;

1. an outer sheath; 100. a sealing sheath seat; 101. sealing the sheath;

2. an anti-falling sheath; 200. an elastic hanging ear; 201. a connecting pipe; 202. a sealing seat;

3. a dilator; 301. expanding the catheter; 302. a dilator seat.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the following description, the proximal end refers to an end proximal to an operator and the distal end is an end distal from the operator.

As shown in fig. 1 to 3, the vascular sheath of the present embodiment comprises adilator 3, an outer sheath tube 1, ananti-drop sheath 2, and anelastic hanger 200; ananti-drop sheath 2 is sleeved on the outer wall of theexpander 3, and an outer sheath tube 1 is sleeved on the outer wall of theanti-drop sheath 2; theelastic suspension loop 200 is arranged at the distal end of theanti-drop sheath 2; the outer sheath tube 1 and theanti-drop sheath 2 can slide relatively to retract theelastic lugs 200 in the lumen of the outer sheath tube 1 or release theelastic lugs 200 from the lumen of the outer sheath tube 1.

Specifically, theelastic suspension lugs 200 are fixedly disposed at the distal end of theanti-falling sheath 2, and the fixing manner may be integrated or may be fixedly connected by welding, nesting, fastening, or other common fixing manners.

As shown in fig. 1, theelastic suspension loop 200 is in a state of being contracted in the outer sheath 1, so as not to affect the penetration process, in this state, theelastic suspension loop 200 is elastically deformed by the wrapping force of the outer sheath, and theelastic suspension loop 200 is limited in the lumen of the outer sheath 1 in a compressed state.

As shown in fig. 2-3, after the vascular sheath is inserted, the outer sheath tube 1 and theanti-drop sheath 2 slide relatively, so that theelastic suspension loop 200 is released from the lumen of the outer sheath tube 1, and as the length of the elastic suspension loop exposed from the lumen of the outer sheath tube increases gradually, the wrapping force of the outer sheath tube on theelastic suspension loop 200 gradually disappears, and theelastic suspension loop 200 is elastically deformed under the action of its own elastic force, so that theelastic suspension loop 200 returns to its original state (the original state herein refers to the state of theelastic suspension loop 200 without being interfered by external force). In the release process, theelastic suspension loops 200 are unfolded along the radial direction of the outer sheath tube 1, and after theelastic suspension loops 200 are unfolded, the distance from the end head of the free end of the elastic suspension loops to the central axis of the outer sheath tube 1 is greater than the radius of the outer sheath tube 1, so that the vascular sheath can be clamped and fixed at a tissue puncture opening, and accidental falling of the vascular sheath in the operation process is prevented.

After the puncture is completed, the outer sheath tube 1 and theanti-drop sheath 2 slide relatively, so that theelastic suspension loop 200 is contracted into the lumen of the outer sheath tube 1, the contraction process is mainly realized by means of elastic deformation of the elastic suspension loop 200 (the process that theelastic suspension loop 200 is contracted into the lumen of the outer sheath tube 1 is described in the above paragraphs, and details are not repeated here), and the withdrawal process of the vascular sheath is not affected after theelastic suspension loop 200 is contracted.

The vascular sheath of this embodiment is used as shown in figures 4a-4 d. In the process of establishing the operation path related to theaortic valve 001 or themitral valve 002 by using the vascular sheath of the present embodiment to perform the transapical intervention operation, after the vascular sheath enters the left ventricle via the apex of the heart, the outer sheath tube 1 may be withdrawn or pushed into theanti-drop sheath 2 to release theelastic suspension loop 200, and the elastic suspension loop is fastened at the apex puncture, so as to prevent the vascular sheath from being dropped off accidentally in the use process. After the puncture is completed, thedilator 3 is withdrawn, the subsequent operation is carried out, theanti-drop sheath 2 can be withdrawn or pushed into the outer sheath tube 1 after the operation path is established, theelastic suspension lugs 200 are contracted into the cavity of the outer sheath tube 1, and finally the outer sheath tube 1 and theanti-drop sheath 2 are withdrawn together.

Optionally, a plurality ofelastic lugs 200 are provided, and a plurality ofelastic lugs 200 are distributed along the circumferential direction of theanti-drop sheath 2. Specifically, the shape and size of the plurality ofelastic lugs 200 may be the same or different, and the plurality ofelastic lugs 200 may be uniformly distributed or unevenly distributed along the circumferential direction of theanti-drop sheath 2. As shown in fig. 2-3 and fig. 4b-4c, the number of the elastic lugs in this embodiment is 2, and the elastic lugs are uniformly distributed along the circumferential direction of theanti-falling sheath 2, and compared with a singleelastic lug 200, a plurality ofelastic lugs 200 can increase the fastening force fastened to the tissue puncture opening after being released, and the uniform distribution can promote the fastening force to be uniformly distributed, so as to promote the fastening effect in the use process.

Alternatively, theelastic suspension tab 200 is a bar-shaped rod, one end of the bar-shaped rod is connected with theanti-drop sheath 2, and the other end of the bar-shaped rod extends along the radial direction of theanti-drop sheath 2. Specifically, as shown in fig. 1-3 and fig. 4b-4c, the strip-shaped rod body in this embodiment is strip-shaped before and after release, and has small deformation amount before and after shrinkage and release, and smoother operation. In addition, the bar body may be in other geometric shapes, such as regular geometric shapes of rectangle, circle, sector, column, etc., or in other irregular geometric shapes with certain area, such as cloud, petal, etc.

Further, the other end of the strip-shaped rod body extends in a serpentine manner along the radial direction of theanti-drop sheath 2; a plurality of arc-shaped protruding parts are arranged on the snakelike strip-shaped rod body; the arc-shaped protruding portion close to theanti-drop sheath 2 protrudes towards the distal end of theexpander 3, and the arc-shaped protruding portion far away from one end of theanti-drop sheath 2 protrudes towards the proximal end of theexpander 3. Specifically, as shown in fig. 2-3 and fig. 4b-4c, after the strip-shaped rod body in this embodiment is released, the other end extends in a serpentine manner along the radial direction of theanti-drop sheath 2, and 2 arc-shaped protruding portions are arranged on the serpentine strip-shaped rod body; the arc-shaped protruding portion close to theanti-drop sheath 2 protrudes towards the distal end of theexpander 3, and the arc-shaped protruding portion far away from one end of theanti-drop sheath 2 protrudes towards the proximal end of theexpander 3. The strip-shaped rod body is released in a serpentine manner, so that the elastic deformation in the release process can be buffered, and the scratch of tissues caused by overlarge deformation of the strip-shaped rod body before and after release is prevented. The arc-shaped protruding part can play a buffering role in the clamping process of the strip-shaped rod body, and the tissue is prevented from being scratched due to the traction of an operator or the action of self gravity in the process of establishing an operation path. As shown in fig. 2-3 and fig. 4b-4c, the arc-shaped protruding portion near theanti-falling sheath 2 protrudes towards the distal end of theexpander 3, and at this time, the deformation of the strip-shaped rod body is larger, so that a larger clamping force can be provided, and the anti-falling performance of the vascular sheath is improved; the arc-shaped protruding portion far away from one end of theanti-drop sheath 2 protrudes towards the direction of the proximal end of theexpander 3, at this time, the end of the strip-shaped rod body far away from theanti-drop sheath 2 faces towards the proximal end of theexpander 3, so that the end of the strip-shaped rod body can be prevented from stabbing tissues in the process of establishing an operation path.

Optionally, one end of the bar-shaped rod body is connected with the end head of the distal end of theanti-drop sheath 2. In particular, as shown in fig. 1-3 and fig. 4b-4c, in this embodiment, the strip-shaped rod body is located at the distal end of theanti-drop sheath 2, and after theanti-drop sheath 2 is fastened, the portion of theanti-drop sheath 2 entering the puncture opening is less, so that the safety is higher, and the operation of thedilator 3 and the outer sheath 1 is more convenient.

Optionally, the strip-shaped rod body and theanti-drop sheath 2 are in an integrated structure. Specifically, the strip body of rod withanticreep sheath 2 passes through integrated into one piece's mode fixed connection, and fixed effect is better, can reduce in the use because the strip body of rod with the risk that the strip body of rod that anticreepsheath 2 holding power was insufficient led to drops promotes product performance.

Further, theelastic suspension loops 200 are made of metal or polymer elastic material. Specifically, theelastic suspension loops 200 may be made of common elastic metal materials such as stainless steel, nickel titanium, cobalt nickel, cobalt chromium, etc., or common elastic polymer materials such as polyurethane and rubber.

Further, thedilator 3 includes adilation catheter 301 and adilator seat 302; the outer wall of theexpansion catheter 301 is sleeved with theanti-drop sheath 2, and theexpansion catheter 301 can slide relative to theanti-drop sheath 2; thedilator seat 302 is mounted on the side wall of the dilatingcatheter 301 at the end remote from theelastic suspension loops 200. The outer sheath 1 comprises a sealingsheath 101 and a sealingsheath holder 100; the sealingsheath tube 101 is sleeved on the outer wall of theanti-drop sheath 2; the sealingsheath seat 100 is disposed on a side wall of the sealingsheath tube 101 at an end far away from theelastic suspension loops 200. Theanti-drop sheath 2 comprises a connectingpipe 201 and a sealingseat 202, the connectingpipe 201 is sleeved on the outer wall of theexpander 3, and the sealingseat 202 is arranged on the side wall of the connectingpipe 201, which is far away from one end of the elastic hanginglug 200. In particular, as shown in fig. 1-2, thedilation catheter 301, the connectingtube 201 and the sealingsheath 101 are coaxially arranged. Thedilator base 302 is fixedly mounted on the side wall of the dilatingcatheter 301 and is operable to move thedilator 3 when the vascular sheath is in use; the sealingseat 202 is fixedly arranged on the side wall of the connectingpipe 201 and can be used for moving theanti-drop sheath 2 when the vascular sheath is used; the sealingsheath holder 100 is fixedly mounted on the side wall of the sealingsheath tube 101, and can be used for moving the outer sheath tube 1 when the vessel sheath is used.

Further, the lengths of the outer sheath tube 1, theanti-drop sheath 2 and theexpander 3 are sequentially increased. Specifically, the lengths of the outer sheath tube 1, theanti-drop sheath 2 and theexpander 3 are sequentially increased gradually, so that theelastic suspension loops 200 in a contracted state can be completely contained in the outer sheath tube 1 near one end of theelastic suspension loops 200, and the vascular sheath is prevented from scratching tissues due to leakage of theelastic suspension loops 200 in the process of entering before puncture and withdrawing after puncture.

From the foregoing description, it will be apparent to those of ordinary skill in the art that, while the methods and apparatus described herein constitute exemplary embodiments of the present disclosure, the utility model is not limited to these specific embodiments and that changes may be made to such embodiments without departing from the scope of the utility model as defined by the following claims. In addition, it is to be understood that the utility model is defined by the claims and this is not intended to describe any limitations or elements of the exemplary embodiments set forth herein to be incorporated into the interpretation of any claim element unless such limitation or element is explicitly stated. Likewise, it is to be understood that not all of the mentioned advantages or objects of the utility model disclosed herein need be met in order to fall within the scope of any claims, as the utility model is defined by the claims and as inherent and/or unforeseeable advantages of the claimed utility model may exist even though they may not have been explicitly discussed herein.

Claims (9)

1. A vascular sheath, comprising: the device comprises an expander, an outer sheath tube, an anti-falling sheath and an elastic hanging lug;

an anti-drop sheath is sleeved on the outer wall of the expander, and an outer sheath tube is sleeved on the outer wall of the anti-drop sheath;

the elastic hanging lugs are arranged at the distal end of the anti-drop sheath;

the outer sheath tube and the anti-drop sheath can slide relatively so as to shrink the elastic suspension lugs in the lumen of the outer sheath tube or release the elastic suspension lugs from the lumen of the outer sheath tube.

2. The vascular sheath of claim 1, wherein the plurality of elastic lugs are distributed along the circumference of the anti-slip sheath.

3. The vascular sheath of claim 1, wherein the elastic suspension tab is a bar-shaped bar, one end of the bar-shaped bar is connected with the anti-drop sheath, and the other end of the bar-shaped bar extends along the radial direction of the anti-drop sheath.

4. A vascular sheath according to claim 3, wherein the other end of the bar-shaped rod extends in a serpentine manner along the radial direction of the anti-drop sheath;

a plurality of arc-shaped protruding parts are arranged on the snakelike strip-shaped rod body;

the arc-shaped protruding portion close to the anti-drop sheath protrudes towards the distal end of the expander, and the arc-shaped protruding portion far away from one end of the anti-drop sheath protrudes towards the proximal end of the expander.

5. A vascular sheath as claimed in claim 3, wherein one end of the bar-shaped rod is connected to the tip of the distal end of the anti-drop sheath.

6. A vascular sheath as claimed in claim 3, wherein the bar body is of unitary construction with the anti-slip sheath.

7. The vascular sheath of claim 1, wherein the elastic lugs are metal or polymeric elastic material.

8. The vascular sheath of claim 1, wherein the dilator comprises a dilation catheter and a dilator hub;

the outer wall of the expansion catheter is sleeved with the anti-drop sheath, and the expansion catheter can slide relative to the anti-drop sheath;

the expander seat is arranged on the side wall of one end of the expansion catheter far away from the elastic hanging lug;

the outer sheath comprises a sealing sheath and a sealing sheath seat;

the sealing sheath is sleeved on the outer wall of the anti-drop sheath;

the sealing sheath seat is arranged on the side wall of one end of the sealing sheath tube far away from the elastic hanging lugs;

the anti-drop sheath comprises a connecting pipe and a sealing seat, the connecting pipe is sleeved on the outer wall of the expander, and the sealing seat is arranged on the side wall of the connecting pipe, which is far away from one end of the elastic hanging lug.

9. The vascular sheath of claim 1, wherein the lengths of the outer sheath, the anti-drop sheath, and the dilator are sequentially incrementally arranged.

Images