CN114288526A - Ultrasound-visible tearable fast-exchange adjustable-bending sheath - Google Patents

Abstract

The application discloses visual adjustable curved sheath pipe of fast switch that can tear under supersound, the sheath pipe is responsible for (1) head end at its sheath pipe and is provided with visual setting element (2) under the supersound the tail end that the sheath pipe was responsible for (1) is provided with adjusts curved control handle (4), sheath pipe accessible internal jugular vein detains the sheath pipe and gets into in the patient's blood vessel to extend to the specific position of interatrial interval along the vein under the supersound guide, supplementary interatrial puncture that carries out.

Description

Ultrasound-visible tearable fast-exchange adjustable-bending sheath

Technical Field

The application belongs to the field of medical equipment, in particular to a visual quick-switching adjustable bent sheath tube capable of being torn under ultrasound.

Background

In cardiovascular interventional procedures, catheters typically do not reach the left atrium directly, but reach the right atrium anterogradely, via a percutaneous approach. A large number of doctors search a method of puncturing through the interatrial septum, so that the catheter can pass through the interatrial septum and enter the left atrium after reaching the right atrium, and the operations of checking, treating and the like of the left heart system are realized.

Currently, the approach to the percutaneous transseptal puncture is mainly the femoral vein due to the problem of puncture angle. The puncture point of the femoral vein approach is at the root of the thigh, and if the left house tube is placed from the femoral vein path, the patient needs to lie in bed and straighten the lower limb to brake. The long-time bed rest and limb brake not only bring potential thrombosis risk to patients, but also easily cause adverse events such as limb numbness, pain, appetite reduction or abdominal distension, urinary retention and the like, and also can cause psychosocial problems such as anxiety, depression, dysphoria and the like. Therefore, the current interatrial septum puncture operation is generally a transient operation, a left atrial catheter cannot be kept, and if secondary diagnosis and treatment is needed, secondary puncture is needed.

Therefore, if left atrial catheter is to be left indwelling for a long period of time, internal jugular vein access should be the first choice. Meanwhile, in order to facilitate bedside operation, an ultrasound lower visual part needs to be arranged on the conveying sheath. Therefore, it is desirable to design and develop a dedicated delivery sheath that is accessed via the internal jugular vein and is visible under ultrasound.

Disclosure of Invention

For solving above-mentioned problem, this application provides a visual adjustable curved sheath pipe of fast swap of tearing under supersound sheath pipe head end is provided with the setting element, the setting element has stronger supersound echo, makes the setting element can clearly develop in order to right under the supersound the front end accurate positioning that the sheath pipe was responsible for to realize the accurate transport of left side canal and pjncture needle, furtherly the front portion of sheath pipe still is provided with adjustable curved, after reaching preset the degree of depth, through adjust set up in the crooked control handle of sheath pipe afterbody adjusts the sheath pipe is responsible for anterior crooked degree, makes the sheath pipe can accurately arrive the room spaced preset position, and the sheath pipe accessible internal jugular vein that this application provided keeps somewhere the sheath pipe and gets into the patient internal to extend to the target location along the vein under the supersound guide, carries out intracardiac operation.

An object of the application is to provide a visual adjustable curved sheath pipe of fast swap of tearing under supersound, the sheath pipe includes that the sheath pipe is responsible for 1 the head end that the sheath pipe was responsible for 1 is provided with visual setting element 2 under the supersound the sheath pipe is responsible for 1 front portion and is provided with adjustable curved member 3 the sheath pipe is responsible for 1 afterbody and is provided with and is used for adjusting adjustable curved member 3 bend angle's bending control handle 4.

In an achievable mode, the maximum outer diameter of the positioning element 2 in the working state is greater than the outer diameter of the sheath main pipe 1, the maximum outer diameter of the positioning element 2 in the non-working state is slightly greater than or equal to the outer diameter of the sheath main pipe 1, and the difference between the maximum outer diameter of the positioning element 2 in the non-working state and the outer diameter of the sheath main pipe 1 is not greater than 0.3mm, so that the positioning element 2 is convenient to be detected in an ultrasonic environment on the one hand, and the positioning element 2 is also convenient to move in a cardiovascular of a patient on the other hand.

In an achievable mode, the positioning element 2 may be drum-shaped or circular ring-shaped, particularly hollow drum-shaped in shape in an operating state, so that the positioning element 2 can cover the front end of the sheath main tube 1 in the operating state, and the front end of the sheath main tube 1 can be clearly developed under ultrasound, and the drum-shaped or circular ring-shaped positioning element 2 is streamline-shaped in structure, so that the sheath can pass through the cardiovascular system of the patient.

In an achievable manner, the spacer 2 has a resilience in the operative state to reduce the resistance of the spacer 2 to travel within the cardiovascular vessel of the patient.

Alternatively, the positioning element 2 may be a balloon, which in the working state is filled with an ultrasound contrast agent, which is a substance visible under ultrasound, such as air or other ultrasound contrast agents available in the prior art.

Further, the fixed pipeline 6 that is used for with setting element 2 intercommunication that is provided with in the inside of the sheath pipe is responsible for 1, pipeline 6 by the afterbody that the sheath pipe is responsible for 1 stretches out the sheath pipe is responsible for 1 the tail end of pipeline 6 is provided with and is used for to fill into the valve 7 of ultrasonic developer in pipeline 6 after valve 7 closes, the inside and the external world of setting element 2 keep apart.

Further, the inner diameter of the pipeline 6 may be 0.2 mm-0.5 mm, so that the internal space of the sheath main pipe 1 is enough for other interventional operation equipment to extend into the sheath main pipe 1, and the diagnosis and treatment operation is performed on the patient.

Alternatively, the bending degree of the adjustable bending member 3 may be-90 ° to +90 °, so that the head end of the sheath main tube 1 can be freely bent to a target position.

In a realizable manner, the adjustable bending member 3 may be two or more, so that the head end of the main sheath tube 1 can more flexibly reach the target position in a limited working space.

Optionally, the planes formed by the movement of the sheath main tube 1 around the plurality of adjustable bending members 3 are not parallel.

Optionally, there are two adjustable bending members 3, and further, two planes formed by the sheath main tube 1 running around the two adjustable bending members 3 are perpendicular to each other, so that the head end of the sheath main tube 1 can flexibly reach the target position.

In another realizable manner, the positioning member 2 may be a rigid ultrasonic imaging member, which may be a substance that is highly echogenic under ultrasonic conditions, such as a coating formed with an ultrasonic imaging substance.

According to general experience, the surface roughness of the coating formed by the ultrasonic developing substance is relatively large, so that the ultrasonic developing substance is not convenient to be directly used in a patient body, and therefore, if the ultrasonic developing coating is used, a super-smooth layer can be further arranged on the surface of the ultrasonic developing substance, so that the operation is convenient. It will be appreciated that the ultra-smooth layer does not interfere with the development of the ultrasound imaging substance under ultrasound.

In an achievable manner, the sheath main tube 1 substantially maintains the preset shape during the course of its travel in the internal jugular vein and reaches the target position.

Optionally, the outer diameter of the sheath main tube 1 is 1.2mm to 3.0mm, preferably 1.7mm to 2.5 mm; the inner diameter is 1.1mm to 2.8mm, preferably 1.6mm to 2.2 mm.

In an achievable manner, a haemostatic valve 8 is arranged at the trailing end of the sheath main tube 1.

In a realizable manner, a side port 9 for introducing a functional catheter is also provided on the sheath main tube 1; the distance between the side port 9 and the head end of the sheath main pipe 1 is 5 cm-40 cm.

Optionally, an ultrasonic development coating may be further disposed on the tube wall of the sheath main tube 1 at a section between the side port 9 and the head end of the sheath main tube 1.

Further, an ultra-smooth layer is arranged on the ultrasonic development coating layer to facilitate operation.

Further, the tube wall of the main tube 1 of the sheath tube is provided with a tearable structure at a section between the side port 9 and the head end of the main tube 1 of the sheath tube, so that the sheath tube can be easily torn along the tearable structure when exiting, thereby facilitating the exiting of the sheath tube.

Further, at the tail end of the sheath main tube 1, a locking device 10 is further provided, and the locking device 10 is used for fixedly connecting the adjustable bending sheath to an instrument connected thereto, for example, a catheter or the like.

Compared with the prior art, the adjustable bent sheath pipe of tearing of visual quick exchange under the supersound that this application provided can get into the right atrium with the internal jugular vein admission passage, adjusts the crookedness of sheath pipe person in charge front end through keeping somewhere under the supersound guide and makes the sheath pipe be responsible for the head end and paste and lean on the oval nest, puts into the pjncture needle puncture the interatrial septum and puncture the interatrial septum, can send into left atrium pipe to the left atrium to realize under the supersound guide internal jugular vein route interatrial septum puncture and put the pipe. The sheath pipe can be directed against different right atriums size, sets up adjustable curved piece in its front end different positions, and the soft elasticity of head end that the sheath pipe was responsible for has the supersound to develop the coating, thereby for the interatrial puncture provides the escape way, prevent the sheath pipe is responsible for damage intracardiac structure or can't pinpoint interatrial puncture point under the supersound. In addition, the front end of the sheath main pipe is of a tearable design, so that the sheath can be completely withdrawn from the blood vessel after the left atrial catheter is placed. The application provides a visual quick exchange can tear adjustable curved sheath pipe security height under the supersound, easily promotes, and the learning cycle is short.

Drawings

FIG. 1 is a schematic view of a preferred ultrasonically visible tearable rapid exchange flexible sheath for transseptal puncture of the present application;

fig. 2 shows a schematic cross-sectional structure a-a in fig. 1.

Description of the reference numerals

1-sheath main pipe, 2-positioning piece, 3-adjustable bending piece, 4-bending control handle, 5-ultrasonic development marker, 6-pipeline, 7-inflation valve, 8-hemostasis valve, 9-side port and 10-locking device.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of methods consistent with certain aspects of the invention, as detailed in the appended claims.

The structure and method of use of the ultrasonically visible, rapidly exchangeable, splittable, bendable sheath provided herein is described in detail below with reference to specific embodiments.

The application scenario is first briefly described:

in this example to use visual quick exchange's under the supersound that this application provided can tear adjustable curved sheath pipe, cooperation pjncture needle and locate its outside left room pipe and internal jugular vein keep somewhere apparatus such as sheath pipe and use, under the supersound guide, through internal jugular vein puncture, with pjncture needle, left room pipe with the sheath pipe is sent to right atrium, adjusts sheath pipe to preset position punctures the interatrial with the pjncture needle, and the left room pipe of guide gets into the left atrium, and withdraws from the sheath pipe explains for the example. It will be appreciated that the adjustable bending sheath provided herein may also be used for other interventional procedures, guided by radiation, and for other purposes, in a manner similar to that shown in the examples below, with some non-essential parameters, such as the length of the sheath, the position and configuration of the handle, etc., being adapted based on the particular anatomy of the particular target puncture site.

Fig. 1 shows that the visual adjustable curved sheath of quick exchange that can tear structure schematic diagram under the supersound that is preferably used for interatrial septum puncture of this application, as shown in fig. 1, the sheath is responsible for 1 including the sheath the head end that the sheath is responsible for 1 is provided with visual setting element 2 under the supersound the sheath is responsible for 1 the front portion that the sheath is provided with adjustable curved member 3 the sheath is responsible for 1 afterbody and is provided with and is used for adjusting the bending control handle 4 of 3 bending angles of adjustable curved member.

In this example, the term "head end" is used to refer to a position different from the term "front portion", specifically, the "head end" refers to the top end in the traveling direction thereof, for example, the head end of the sheath main tube refers to the end surface of the top end in the traveling direction thereof and a small portion of the tube body adjacent to the end surface; the "front part" indicates a part of the tube body near the top end in the traveling direction, for example, the front part of the sheath tube main tube may be a tube body near the end surface 1/4 length of the top end in the traveling direction; it will be appreciated that the "front" covers a greater extent of tubes than the "head end".

The utility model provides a sheath pipe is provided with the setting element at its head end and makes the sheath pipe can operate under the supersound guide, and, the setting element is in rigidity on the sheath pipe, consequently, can be under the supersound guide according to the position of setting element is confirmed and is worn to locate the position of other functional pipe head ends in the sheath pipe to operate under the supersound guide, avoid traditional radioactive ray guide, avoid the radiation.

In this example, the sheath main tube 1 is an elongated tube body, and has a channel inside which other elongated shape tubes and/or guide wires can be inserted.

For example, in interatrial puncture, the inner diameter of the sheath main tube 1 is 1.1mm to 2.8mm, preferably 1.6mm to 2.2mm, so that at least one left atrial catheter and one puncture needle can be accommodated therein, wherein the puncture needle point is located inside the head end of the sheath main tube, i.e., the needle point of the puncture needle may be flush with the head end of the sheath main tube 1 or may be slightly retracted into the sheath main tube 1. It will be appreciated that the interior of the sheath main tube 1 may also be used to accommodate other elongated objects used for interventional procedures or left in the body of a patient by interventional procedures.

Further, hold in the sheath is responsible for 1 inside pipe and/or seal wire and can be followed the sheath is responsible for 1 and gets into the patient in the lump, and can follow the sheath is responsible for 1 inside passageway and stretches out the sheath is responsible for 1, also can be earlier with the sheath is responsible for 1 and is delivered to after presetting the position, will again pipe and/or seal wire by the sheath is responsible for 1 side mouth 9 or the tail end entering the sheath is responsible for 1 inside passageway, and follows the passageway extends to the head end that the sheath is responsible for 1, furtherly stretches out the head end that the sheath is responsible for 1.

In this application, the "head end" refers to the end of the sheath that extends into the patient, and the "tail end" refers to the end that is located outside the patient.

Optionally, the wall thickness of the sheath main tube 1 is uniform, and the rigidity and elasticity are also uniform. The sheath main tube 1 may be passed into a blood vessel through an indwelling sheath and extended along the blood vessel, for example, in a transjugular pathway transatrial septal puncture, may be passed into the patient from the internal jugular vein and extended along the blood vessel to the right atrium.

In this example, the outer diameter of the sheath main tube 1 may be 1.2mm to 3.0mm, preferably 1.7mm to 2.5mm, that is, the outer diameter of the sheath main tube 1 is smaller than the inner diameter of the internal jugular vein, so that the sheath main tube 1 can smoothly extend along the blood vessel, and the sheath main tube 1 has enough strength to allow the sheath main tube 1 to maintain a preset shape in the blood vessel to provide a supporting function for the left atrial catheter and the puncture needle in a case that a sufficient space is reserved inside the sheath main tube 1 for the puncture needle and the left atrial catheter.

Further, the sheath main tube 1 can not only maintain a preset shape in the process of passing through the blood vessel, but also reduce the damage to the blood vessel, so that the sheath main tube 1 can smoothly reach a preset position along the blood vessel.

It is understood that the length of the sheath main tube 1 may be specifically set according to the length of the patient, and in general, the length of the sheath main tube 1 may be 8cm to 50cm, preferably 15cm to 40 cm.

In this example, a hemostatic valve 8 is provided at the tail end of the sheath main tube 1.

Fig. 2 shows a schematic cross-sectional structure view of a-a in fig. 1, as shown in fig. 2, the positioning element 2 is annular in a working state, and the positioning element 2 is coaxial with an end surface of the head end of the sheath main tube 1, that is, the positioning element 2 is arranged along the circumferential direction of the head end of the sheath main tube 1, so that other instruments such as a left atrial catheter, a puncture needle and the like arranged inside the sheath main tube 1 can penetrate out of the sheath main tube 1 as required, and the positioning element 2 is not damaged.

Further, the maximum outer diameter of the positioning element 2 in the working state is larger than the outer diameter of the sheath main pipe 1, and the difference between the maximum outer diameter of the positioning element 2 in the working state and the outer diameter of the sheath main pipe 1 is not more than 10 mm. Because the elasticity of setting element 2 is greater than the sheath pipe is responsible for 1 elasticity, consequently, the great setting element 2 of diameter still can be cardiovascular with the sheath pipe is responsible for 1 and provides elasticity buffering space, consequently, can reduce the sheath pipe and be responsible for the mechanical damage of head end to cardiovascular.

Further, the top end of the positioning piece 2 is provided with a round corner, so that the positioning piece 2 is in flexible contact with the cardiovascular system, and the damage to the cardiovascular system is further reduced.

In this example, the positioning element 2 has elasticity in the working state, and the applicant finds that, if the positioning element 2 is within a specific elastic modulus range, the sheath main tube 1 can not only accurately position the head end of the sheath main tube in the patient body by ultrasound, but also avoid the positioning element 2 from damaging the endocardium of the cardiovascular system in the process of continuously extending in the cardiovascular system.

In this example, the spacer 2 may be made of medical silicone, medical rubber, or other available materials.

Alternatively, the positioning element 2 may be a balloon, the balloon may be annular and arranged along the circumferential direction of the main head end of the sheath tube, after the balloon is filled with an ultrasonic developer such as gas, the balloon may be annular, and the annular shape is coaxial with the main tube of the sheath tube.

In this example, a pipeline 6 for communicating with the positioning element 2 and the balloon is fixedly arranged inside the main sheath tube 1, one end of the pipeline 6 is communicated with the balloon, the other end of the pipeline extends out of the main sheath tube 1 from the tail of the main sheath tube 1, the pipeline 6 can keep synchronous change along with the shape of the main sheath tube 1, specifically, can advance along with the advancing of the main sheath tube 1, and can bend along with the bending of the main sheath tube 1. It will be appreciated that the bend of the sheath in the blood vessel is a smooth bend, i.e. the passage of the conduit 6 is not blocked after bending, but the ultrasound contrast agent can still be infused into the balloon through the conduit 6.

Further, the cross section of the conduit 6 may be any shape, such as an ellipse, etc., so as to facilitate ventilation and bending, and preferably occupy a minimum space in the sheath main tube 1, for example, the cross section of the conduit 6 is a sickle shape, so that the available space inside the sheath main tube 1 is approximately elliptical, thereby facilitating the passage of other instruments such as a catheter in the sheath main tube 1.

In this example, the trailing end of the tube 6 is provided with a valve 7 for filling or releasing the ultrasonic developer into the tube 6. In this example, the medium filled in the balloon may be any medically acceptable ultrasound imaging agent, such as medical carbon dioxide, etc., to ensure the life safety of the patient.

In this example, the positioning member 2 may be in the same form as the positioning member in the operating state or in a different form from the positioning member in the operating state in the non-operating state. For example, if the positioning member 2 is made of an ultrasonic developing material having a preset shape, the working state and the non-working state are the same; for another example, if the positioning element 2 is a balloon, the inside of the balloon can be deflated without filling the ultrasonic developer in the non-working state.

In another realizable manner, the positioning member 2 in the sheath is a rigid imaging member, and the rigid imaging member is a substance having strong echo under ultrasonic conditions, for example, a coating formed by an ultrasonic imaging substance, so that the catheter tip can be accurately positioned under ultrasonic conditions.

Further, on the pipe wall of the sheath pipe main pipe 1 at the front end of the positioning element 2, an ultrasonic development marker 5 can be further arranged, and because the positioning element 2 is fixed at the head end of the sheath pipe main pipe, the relative position of the positioning element 2 and the sheath pipe main pipe is fixed, the head end position of the sheath pipe can be determined jointly by the positions of the positioning element 2 and the ultrasonic development marker 5.

In this example, the head of the main tube 1 of the sheath tube is provided with an adjustable bending member 3, and the adjustable bending member 3 may be one, two or more, so as to make the adjustment of the main tube of the sheath tube more flexible.

As shown in fig. 1, the sheath main tube 1 can be bent along the adjustable bending member 3.

In this example, the number of adjustable bending members 3 can be specifically set according to the use requirement, for example, only one bending in the right atrium is needed, and only a single adjustable bending member 3 is needed. It is understood that the structural complexity of the inside of the sheath main tube 1 and the manufacturing cost thereof increase as the number of the adjustable bent pieces increases, and further, the operation complexity of the sheath main tube also increases, and thus, the adjustable bent pieces 3 can be provided as small as necessary.

In this example, each adjustable bending member 3 is controlled by a specific bending control handle 4, the number of bending control handles 4 being equal to the number of adjustable bending members 3.

Further, if the number of the adjustable bending members 3 is two or more, the distance between two adjacent adjustable bending members can be specifically set according to actual needs. The applicant prefers to have two adjustable bending parts 3 according to the actual use requirement.

Optionally, the planes formed by the bending motion of the plurality of adjustable bending members 3 are not parallel.

Optionally, two planes formed by the bending operation of the two adjustable bending members 3 are perpendicular to each other, so that the front end of the sheath main tube 1 can flexibly reach a target position.

Optionally, the bending degree of the adjustable bending piece 3 is-90 degrees- +90 degrees, so that on one hand, the requirement of most operations on the bending angle can be met, on the other hand, the control on the bending angle is facilitated, and the intervention operation is facilitated.

Further, if a plurality of adjustable bending members 3 are disposed on the sheath main tube, after the sheath main tube is bent around the adjustable bending members 3, a plurality of planes formed by the movement of the sheath main tube around different adjustable bending members 3 are not parallel, and an included angle between the planes may be 0 ° to 90 °.

In particular, if there are two adjustable bending members 3, the two planes formed by the movement of the sheath main tube around the two adjustable bending members 3 are perpendicular to each other.

The sheath main pipe can form a three-dimensional configuration after being bent by different adjustable bending pieces, so that the sheath main pipe can reach a specific position in a patient body to complete specific operation. It can be understood that, the larger the number of the adjustable bending members is, the larger the angle between the adjacent bending surfaces is, the larger the obstruction caused by the advancing of the catheter passing through the main tube of the sheath tube is, and therefore, in the actual use process, the included angle between the adjacent bending surfaces can be reduced as much as possible.

In this example, a hemostatic valve 8 is provided at the tail end of the sheath main tube 1.

In this example, the sheath main tube 1 is provided with a side port 9 for introducing a functional catheter, which is another tubular/linear operation instrument used in the operation, for example, a left atrial catheter or a puncture needle, and the distance between the side port 9 and the tip end of the sheath main tube 1 is 5cm to 40 cm.

In this example, an ultrasonic development coating may be disposed on the tube wall of the sheath main tube 1 between the side port 9 and the head end of the sheath main tube.

In this instance, further, the sheath main tube 1 may be provided with a tearable structure between the side port 9 and the head end thereof, so that the sheath main tube 1 can be withdrawn, for example, after placing the left atrial catheter, to be easily withdrawn completely from the blood vessel.

Further, a locking device 10 is further disposed at the tail end of the sheath main tube 1, and the locking device 10 is used for fixedly connecting the bendable sheath to an instrument connected thereto, for example, a catheter or the like, so as to facilitate diagnosis and treatment.

The following illustrates the use of the ultrasonically visible, rapidly switched, tearable, bendable sheath provided by the present application, by way of example, in puncturing the interatrial septum through the internal jugular vein and delivering the left atrial indwelling catheter:

firstly, a puncture needle is arranged in a left atrium indwelling catheter, the left atrium indwelling catheter provided with the puncture needle is penetrated into the ultrasonic visible quick-exchange tearable and bendable sheath catheter, after preparation is finished, internal jugular vein puncture is carried out and the indwelling sheath catheter is arranged, the indwelling sheath catheter is fixed at a puncture point, the bendable sheath catheter is penetrated through a side port on a main tube of the indwelling sheath catheter, an ultrasonic detection device is started, a positioning piece (which can be converted into a working state according to the arrangement depth) and an ultrasonic development coating at the head part of the bendable sheath catheter are positioned, under ultrasonic guidance, the sheath catheter is enabled to continuously extend to the heart along a blood vessel, after the head part of the main tube of the sheath catheter is displayed by ultrasonic to reach the middle of the right atrium, the length of the main tube of the sheath catheter in the right atrium is adjusted, and the bending direction and the bending angle of the head part of the main tube of the sheath catheter are adjusted through a bending control handle, make sheath pipe head butt in the position of heart oval nest, the rethread is stayed and is arranged in carry the sheath pipe to be responsible for the outside left room of tail end and keep somewhere the management and control finished piece and pjncture needle caudal peduncle promotion pjncture needle and left room pipe and stretch out the head that adjustable bent sheath pipe was responsible for is rotatory interatrial septum pjncture needle punctures the oval nest to guide left room pipe and get into the left atrium, treat left room pipe gets into in the left atrium and fixes the back, withdraws earlier the pjncture needle again rolls back the sheath pipe is responsible for outside to keeping somewhere the sheath pipe, will the sheath pipe is responsible for the structure of tearing of side mouth to head end and is torn, makes sheath pipe and left room are kept somewhere the pipe separation.

The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.

Claims (10)

1. The utility model provides a visual adjustable curved sheath pipe of fast switch that can tear under supersound, its characterized in that, the sheath pipe includes that the sheath pipe is responsible for (1) the head end that the sheath pipe is responsible for (1) is provided with visual setting element (2) under the supersound the sheath pipe is responsible for the front portion of (1) and is provided with at least one adjustable curved member (3) the afterbody that the sheath pipe is responsible for (1) is provided with and is used for adjusting adjustable curved member (3) bend angle's crooked control handle (4).

2. The sheath according to claim 1, wherein the maximum outer diameter of the positioning member (2) in the operating state is larger than the outer diameter of the sheath main pipe (1), the maximum outer diameter of the positioning member (2) in the non-operating state is slightly larger than or equal to the outer diameter of the sheath main pipe (1), and the difference between the maximum outer diameter of the positioning member (2) in the non-operating state and the outer diameter of the sheath main pipe (1) is not more than 0.3 mm.

3. Sheath according to claim 1, characterized in that the positioning element (2) is a balloon.

4. A sheath according to claim 3, wherein the positioning member (2) is filled with an ultrasonic developer therein in an operating state.

5. The sheath according to claim 3, wherein a pipeline (6) communicated with the positioning member (2) is fixedly arranged inside the sheath main pipe (1), the pipeline (6) extends out of the sheath main pipe (1) from the tail part of the sheath main pipe (1), and a valve (7) for inflating or filling an ultrasonic developer into the pipeline (6) is arranged at the tail end of the pipeline (6).

6. The sheath according to claim 1, wherein the positioning member (2) is a rigid ultrasound developing member.

7. The sheath according to claim 1, wherein a hemostatic valve (8) is provided at the trailing end of the sheath main tube (1).

8. The sheath according to claim 1, wherein a side port (9) for introducing a functional catheter is provided at the tip of the sheath main tube (1).

9. The sheath according to claim 1, wherein the side port (9) is provided between the positioning member (2) and the tail end of the sheath main tube (1).

10. Sheath according to claim 1, characterized in that the sheath main tube (1) has a tearable structure between the side port (9) to the head end.

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