CN214805056U

CN214805056U - Body cavity adjusting device

Info

Publication number: CN214805056U
Application number: CN202120106932.XU
Authority: CN
Inventors: 王逸斐
Original assignee: Shenzhen Lanteng Technology Co ltd
Current assignee: Shenzhen Lanteng Technology Co ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-11-23
Anticipated expiration: 2031-01-14

Abstract

The utility model relates to a body cavity adjusting device, include: the adjustable bending catheter comprises an axial catheter wall and an axial catheter cavity enclosed by the catheter wall; an expandable mechanism fixedly sleeved on the catheter; and the cable is movably arranged in the tube cavity in a penetrating way, and the tube wall arranged on one side of the expandable mechanism penetrates out of the tube cavity, so that the catheter bends relative to the expandable mechanism and then penetrates back to the tube cavity from the tube wall. The operation is simple and the safety is high only by changing the expansion state of the expandable mechanism and locking the adjustable bent conduit through the cable. The expandable mechanism with larger contact area can not cause excessive stimulation to local body cavities. The spacing to the body cavity can be relieved to only needing the control cable, and it is convenient should relieve the process, compares in traditional silk thread winding's mode, and it still can carry out the operation of unblock, blood flow regulation and refluence after the wound is sewed up, need not to unblock under visual environment and removes, the risk that the winding was knoed can not appear yet.

Description

Body cavity adjusting device

Technical Field

The utility model relates to an intervene the medical instrument field, especially relate to body cavity adjusting device.

Background

Atherosclerosis is the most common cause of carotid stenosis in middle and old aged patients. Patients are often accompanied by hypertension, diabetes, hyperlipidemia, obesity, smoking and other risk factors which are easy to cause cardiovascular and cerebrovascular damage. Atherosclerosis is caused by accumulation of lipid substances on the blood vessel wall, macrophages in the blood vessel wall engulf the lipid substances to form a lipid pool, and simultaneously, a fiber cap on the surface of the lipid pool is formed, and the lipid core and the fiber cap form the main component of atherosclerotic plaque of the artery wall. The plaque is gradually enlarged to enable the lumen to be gradually narrowed, or the plaque is unstable and is broken, lipid components in the plaque are exposed in the lumen of the blood vessel, so that blood platelets are gathered to form thrombus, and the thrombus falls off. All of which can lead to the occurrence of cerebral ischemic events.

Carotid stenosis due to atherosclerosis is often located at the end of the common carotid artery, where the initial, siphonic and terminal carotid arteries are divided into the anterior and middle cerebral arteries. Patients with severe and symptomatic moderate stenosis often require surgical treatment for removal of atherosclerotic plaque using Carotid Endarterectomy (CEA), during which the plaque and thickened intima are stripped away by cutting open the target vessel by blocking common carotid artery blood flow. CEA surgery is generally effective in treating plaque and intima, but during the interruption of common carotid blood flow, suddenly altered hemodynamics often lead to associated complications such as Cerebral Hyperperfusion Syndrome (CHS), whose clinical manifestations include throbbing headaches around the frontotemporal and periorbital areas (sometimes the headaches can be diffuse); pain in the eye and face; nausea, vomiting, disturbance of consciousness, cerebral edema and impaired vision; epilepsy; damage to functional nerves; intracranial or subarachnoid hemorrhage, and the like. Clinically, CHS, if not properly diagnosed and treated, can have serious and even life-threatening consequences. It is generally believed that the abrupt opening of vessels following carotid surgery causes some of the patients with inadequate cerebrovascular autoregulatory function to develop high perfusion-related complications such as CHS.

The liver cirrhosis portal hypertension surgical operation field also has similar complications, and the incidence rate of portal vein system thrombosis after the flow interruption of splenectomy is high, because portal vein blood flow is slow, namely pressure in a hepatic sinus rises, the liver perfusion of portal hypertension patients is further worsened by the thrombosis, on one hand, liver function is damaged, on the other hand, gastrointestinal tract congestion and portal hypertension stomach diseases appear, and the portal vein pressure rising state of partial patients is not relieved, so that the upper gastrointestinal tract bleeding attacks repeatedly. In order to reduce portal vein pressure and avoid the situation of digestive tract hemorrhage, the spleen artery blood vessel is often required to be limited in the operation, at present, a silk thread winding mode is mostly adopted, but the operation is complex, the stimulation to the blood vessel is large, meanwhile, the current limiting control is unstable, and the situations of spleen artery occlusion and the like are often caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the adverse reaction that the body cavity is pressed or is oppressed the back pressure mutation and bring, the application provides a body cavity adjusting device, includes:

the adjustable bending catheter comprises an axial catheter wall and an axial catheter cavity enclosed by the catheter wall;

an expandable mechanism fixedly sleeved on the catheter; and

the cable is movably arranged in the tube cavity in a penetrating mode and configured to penetrate out of the tube cavity from the tube wall on one side of the expandable mechanism, and the guide tube is bent relative to the expandable mechanism and then penetrates back to the tube cavity from the tube wall.

Preferably, the expandable mechanism includes at least one balloon.

Preferably, the expandable mechanism includes two balloons that are axially spaced apart.

Preferably, the expandable mechanism comprises an expandable braided mesh or an expandable cut mesh.

Preferably, the cable is configured to extend through the lumen from a wall of one side of the expandable structure, and to extend back through the lumen from a wall of the other side of the expandable structure after bending the catheter relative to the expandable structure.

Preferably, the catheter includes a distal opening and a first opening in the wall of the tube on a proximal side of the expandable stent; the distal opening and the first opening are both in communication with the lumen, and the cable passes out of the distal opening and into the first opening.

Preferably, the catheter includes a first opening in the wall of the catheter on the proximal side of the expandable structure and a second opening in the wall of the catheter on the distal side of the expandable structure; the first opening and the second opening are communicated with the lumen, and the cable penetrates out of the first opening and penetrates into the second opening.

Preferably, the conduit further comprises a third opening disposed adjacent the first opening; the third opening communicates with the lumen.

Preferably, the cable is configured to extend out of the lumen through the wall of the tube on one side of the expandable structure, and to extend back into the lumen through the wall of the tube where the cable extends out of the lumen after passing around the catheter on the other side of the expandable structure.

Preferably, the catheter comprises, in order from the distal end to the proximal end, a first section and a second section, the first section having a hardness lower than that of the second section, the expandable stent being fixedly secured to the first section.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

use the utility model discloses a body cavity adjusting device, only need in the operation change expandable mechanism the expansion state and through cable locking adjustable curved catheter can, easy operation, the security is high. The expandable mechanism with larger contact area can not cause excessive stimulation to local body cavities. The body cavity adjusting device of the utility model can also realize short-term internal retention, and can continue to realize the adjustment of the liquid flow in the body cavity through adjusting the expandable mechanism in the process of flow limiting, and the operation is simple and controllable. And only need the control cable can relieve the spacing to the body cavity, should relieve the process convenient, and safe and reliable, compare in traditional silk thread winding's mode, it still can carry out the operation of unblock, blood flow regulation and refluence after the wound is sewed up, need not to unblock under visual environment and remove, can not appear the risk of twining and knoing yet, has improved security and maneuverability greatly, provides more nimble changeable postoperative treatment scheme for different art formulas.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

In the drawings:

fig. 1 is a schematic structural view of a body cavity adjusting apparatus according to a first embodiment of the present invention;

FIG. 2 is a schematic view of the body cavity adjusting apparatus of FIG. 1 after bending;

FIG. 3 is a schematic view of the body lumen adjusting device of FIG. 1 with the expandable stent unexpanded;

FIG. 4 is an enlarged view of the area C1 in FIG. 3;

FIG. 5 is a sectional view of the body cavity adjustment device of FIG. 1;

FIG. 6 is a schematic view of compression of a body lumen after expansion of an expandable structure of the body lumen adjusting device of FIG. 1;

FIGS. 7A-7C are schematic illustrations of the gradual expansion of the expandable structure of the body lumen adjusting device of FIG. 1;

fig. 8 is a schematic structural view of a body cavity adjusting apparatus according to a second embodiment of the present invention;

FIG. 9 is a partial cross-sectional view of the body cavity adjustment device of FIG. 8 at a bend adjustment section;

fig. 10 is a schematic structural view of a body cavity adjusting apparatus according to a third embodiment of the present invention;

fig. 11 is a schematic structural view of a body cavity adjusting apparatus according to a fourth embodiment of the present invention;

fig. 12 is a schematic structural view of a body cavity adjusting apparatus according to a fifth embodiment of the present invention;

FIG. 13 is a partial cross-sectional view of a body cavity adjustment device according to a sixth embodiment of the present invention, shown after being received in an adjustment cavity;

FIG. 14 is a partial cross-sectional view of the body lumen adjustment device of FIG. 13 after it has been expanded and extended from the adjustment lumen.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate that the device or element referred to must have a specific direction, and thus, should not be construed as limiting the present invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In the description of the present invention, it should be noted that, in the field of interventional medical devices, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator; axial refers to a direction parallel to the line joining the center of the distal end and the center of the proximal end of the medical device. The foregoing definitions are for convenience only and are not to be construed as limiting the present invention.

Referring to fig. 1 to 7C, a body cavity adjusting apparatus 1 according to a first embodiment of the present invention includes: the adjustable bending catheter 11, the catheter 11 includes a tube wall 111 along an axial direction H and an axial lumen 1121 surrounded by the tube wall 111; an expandable stent 12 fixedly sheathed on the catheter 11; and a cable 13 movably inserted through the lumen 1121, and disposed so as to be capable of passing through the lumen 1121 from the tube wall 111 on the side of the expandable stent 12, so that the catheter 11 is bent with respect to the expandable stent 12 and then is inserted back into the lumen 1121 from the tube wall 111.

Specifically, the adjustable bending conduit 11 means that the conduit 11 can be adjusted and bent relative to the axial direction H, and the whole conduit 11 can be adjusted and bent along the axial direction H, and can also be adjusted and bent in a partial section. For example, in a specific embodiment of this embodiment, the catheter 11 includes a first section 11D and a second section 11P in sequence from the distal end to the proximal end along the axial direction H, the expandable mechanism 12 is fixedly sleeved on the first section 11D, the first section 11D can be adjusted and bent relative to the axial direction H, the second section 11P can be kept unchanged and not adjusted and the expandable mechanism 12 can change the spatial position along with the adjustment and bending of the first section 11D. The bending adjusting mode has various modes, and the bending adjusting can be performed by any suitable mode, for example, a bending adjusting pull wire is embedded in the pipe wall 111, so that the pipe 11 is pulled to be bent, or the pipe 11 is directly bent by depending on the material characteristics of the pipe, and the like, and details are not repeated herein.

Further, the hardness of the first section 11D may be set smaller than that of the second section 11P to facilitate the bending of the first section 11D. For example, the conduit 11 may be formed by splicing a first section 11D and a second section 11P, wherein the first section 11D is made of a material having a hardness of 55D, the second section 11P is made of a material having a hardness of 65D, and the first section 11D is pre-plasticized to form a nearly closed ring in a natural state.

In this embodiment, the cable 13 is disposed so as to extend out of the lumen 1121 through the tube wall 111 on one side of the expandable stent 12, and then to extend back into the lumen 1121 through the tube wall 111 on the other side of the expandable stent 12 after the catheter 11 is bent with respect to the expandable stent 12.

Specifically, the lumen 1121 has openings at both the proximal end surface and the distal end surface of the catheter 11, that is, the lumen 1121 penetrates in the axial direction H, and the cable 13 can penetrate through the opening of the proximal end surface (referred to as the proximal opening, not shown in the figures), penetrate through the lumen 1121, and then penetrate out of the opening of the distal end surface (referred to as the distal opening 11 a). A first opening 11b is disposed on a wall 111 enclosing the lumen 1121, and the first opening 11b is located at a proximal side of the expandable stent 12, such that the distal opening 11a and the first opening 11b are located at two opposite sides of the expandable stent 12. The distal opening 11a and the first opening 11b are both in communication with the lumen 1121, and the cable 13 can pass through the distal opening 11a and then pass through the first opening 11b back into the lumen 1121.

The catheter 11 may be a multi-lumen extruded tube made of a high-flexibility elastic material, which may be polyurethane, and a plurality of lumens may be formed in the axial direction H during the extrusion molding process, wherein one of the lumens 1121 may be used for inserting the cable 13. The cross-section of the lumen along a direction perpendicular to the axis may be circular, elliptical, oblong, rectangular, or other tailored shape. The multi-lumen arrangement of the catheter tube 11 may serve multiple purposes, such as a guidewire lumen for passage of a guidewire, a lumen for fluid irrigation or blood aspiration, and the like.

In one embodiment, catheter 11 has an effective axial length of 100mm, a diameter of 8F (2.7mm), a lumen 1121 with an inner diameter of 2mm, an axial distance between first opening 11b and distal opening 11a of about 28mm, and expandable mechanism 12 disposed 20mm from distal opening 11 a. It should be understood that the structure of the lumen 1121 is provided herein by way of example only and not as a limitation of the present invention, and that other suitable sizes of catheter 11 may be selected by one of ordinary skill in the art as desired.

Expandable structure 12 is particularly a continuously expandable and continuously contractible structure, and in this embodiment expandable structure 12 includes a balloon 12, such as a non-compliant balloon 12 of nylon material, and the balloon 12 has a filling diameter of 6-12mm, such as 8 mm. The balloon 12 may be a flexible long length balloon 12 to cover the entire bendable first section 11D, rather than being crushed on one side, in a manner that may further reduce irritation of the body lumen 2. An eccentric balloon may also be used to reduce the effect on the surrounding tissue.

The balloon 12 is disposed between the distal opening 11a and the first opening 11b, and is sleeved on the outer circumferential wall 111 of the catheter 11. Correspondingly, the catheter 11 further includes a filling cavity 1122 disposed in the tube wall 111, and a filling opening 11c disposed on the tube wall 111, the filling cavity 1122 along the axial direction H is one of the extruded tube cavities, and the inner diameter of the filling cavity 1122 is 0.3-0.7mm, for example, 0.5mm in this embodiment. The filling lumen 1122 communicates with the balloon 12 through the filling opening 11c, and the filling liquid enters the balloon 12 through the filling catheter 11 and the filling opening 11c to fill the balloon 12, thereby adjusting the filling size or volume of the balloon 12 by filling or relieving pressure. For example, the balloon 12 may be gradually adjusted from an initial, uninflated state to a maximum, inflated state, or the inflated balloon 12 may be deflated to gradually decrease its size or volume, thereby allowing continuous adjustment of the size or volume of the expandable structure 12 via inflation adjustment of the balloon 12.

Above cocoa expansion mechanism 12 all serves as an example, and is not a limitation to the present invention, and one skilled in the art can select a suitable expansion mechanism according to actual needs, and it is not repeated here, and the body cavity adjusting device 1 with each expansion mechanism based on the teaching of the present invention is within the protection scope of the present invention.

The cable 13 is inserted into the lumen 1121 of the catheter 11, specifically, the cable passes through the first joint 141 of the catheter 11, passes through a proximal opening (not shown), passes through the lumen 1121, and then passes out of the distal opening 11 a; after the first section 11D of the catheter 11 is bent, the cable 13 passing through the distal opening 11a can pass through the first opening 11b formed in the peripheral wall of the catheter 11 and back into the lumen 1121, and finally pass through the first connector 141, so that the catheter 11 is closed at the distal end portion to form an approximate circular ring, so as to lock the bent state of the catheter 11 by the control cable 13.

The cable 13 may be a cable made of a polymer material, or a multi-strand stainless steel wire rope; or can be formed by splicing different materials, such as a plurality of strands of stainless steel wire ropes and stainless steel bars, so that the pushing performance of the cable 13 is improved, and the operation hand feeling is improved. Reduce the risk of knoing for improving 13 operation handfeels of cable, cable 13 can adopt hydrophilic coating to carry out surface lubrication and handle, reduces frictional force to the lubricated pipe of mode cover setting polymer (like polytetrafluoroethylene) of accessible surface coating realizes reducing frictional force's effect. The cross-section of the locking cable 13 along the proximal-distal central axis may be circular, elliptical, oblong, rectangular, or other tailored shape.

The body cavity adjustment device 1 further comprises a connector assembly 14, the connector assembly 14 comprising at least one first connector 141 and at least one luer connector 142. The first connector 141 is communicated with the catheter 11 through the proximal opening of the catheter 11, so as to be communicated with the lumen 1121 for accommodating the cable 13, one end of the cable 13 is always positioned outside the first connector 141, the other end of the cable firstly penetrates into the first connector 141, sequentially passes through the lumen 1121 in the directions of B2 and B3, penetrates out of the distal opening 11a, then penetrates back into the lumen 1121 from the first opening 11B, and finally penetrates out of the first connector 141, and the two ends of the cable 13 are operated near the first connector 141, so that the bending adjusting state of the bending adjusting catheter 11 can be locked and closed, or the bending adjusting catheter 11 can be unlocked and released, or the bending state of the catheter 11 can be controlled. Luer connector 142 is connected to catheter 11 at the proximal end of catheter 11 and is in communication with filling chamber 1122, and the filling fluid can fill balloon 12 through luer connector 142 and filling chamber 1122 to increase the volume or size of the balloon 12, and the filling fluid in balloon 12 can also flow out from filling chamber 1122 and the luer structure to release pressure, and the volume or size of balloon 12 is gradually reduced during the pressure release process to adjust the expanded state.

Referring to fig. 3-5, in operation, the distal end of the catheter 11 is first bent around the body cavity 2 (e.g. the target blood vessel, B1 is the direction of body fluid or blood flow), and the distal opening 11a of the catheter 11 is aligned with the first opening 11B formed in the catheter 11, and simultaneously one end of the cable 13 is inserted from the first connector 141, passes through the lumen 1121 of the whole catheter 11, extends out from the distal opening 11a of the catheter 11, then passes through the first opening 11B formed in the outer circumferential wall of the catheter 11 back into the lumen 1121, and continues back to the first connector 141, so as to fix the body cavity adjustment device 1 to the body cavity 2. After the cable 13 is fixed, the cable 13 may be fixed manually or by means of devices, for example, the catheter 11 is in direct contact with the body cavity wall, or the gap between the catheter 11 and the body cavity wall is small.

As shown in fig. 6, after fixation, the balloon 12 starts to be inflated through the luer connector 142 and the catheter 11, and the volume of the balloon 12 gradually increases during the inflation process, and the enlarged balloon 12 will gradually compress the body cavity 2 to different degrees outside the body cavity 2 (e.g., target blood vessel). Referring to fig. 7A, during the initial filling phase of balloon 12, balloon 12 slightly compresses target vessel 2 and target vessel 2 is not significantly deformed. Referring to fig. 7B, as the filling process continues, the further expanded balloon 12 gradually increases the compression on the body cavity 2, and the compressed body cavity 2 abuts against the catheter 11 under the surrounding of the curved catheter 11, so as to limit the deformation space of the body cavity 2, so that the cross-sectional area of the compressed body cavity 2 becomes smaller and smaller, and the blood flow through the cross-section is also gradually reduced. Referring to fig. 7C, when balloon 12 is fully inflated, target vessel 2 is minimally constricted by extreme pressure and there is minimal fluid flow. In the above operation, the size of the body fluid can be gradually adjusted by gradually adjusting the filling of the balloon 12 and restricting the deformation space of the body cavity 2, and then the passage of the body fluid is finally blocked, for example, when the body cavity is a blood vessel, the size of the blood flow can be gradually adjusted. When the operation is finished or the organ protection is finished, the balloon 12 can be thoroughly decompressed, and the extrusion and compression on the body cavity 2 are relieved; at the same time, the cable 13 for locking is withdrawn, releasing the deformed space of the body cavity 2, so that the cavity of the body cavity 2 is gradually restored to normal, and thus the instrument can be slowly withdrawn from a small wound.

The utility model discloses a body cavity adjusting device 1 cooperates in order to form the space of injecing the body cavity deformation through adjustable curved pipe 11 and locking cable 13, combines expandable mechanism 12 to contract through expansion oppression body cavity or expansion and remove the oppression to realize the flow of body fluid in the continuous adjustment body cavity and block that the body fluid flows, when this body cavity is the blood vessel, can be called the target blood vessel in the operation, can be with the flow of adjusting blood in the blood vessel and block that the blood flow flows.

In operation, only the balloon 12 needs to be inflated or decompressed, and the adjustable bent catheter 11 needs to be locked through the cable 13, so that the safety is high. The present invention employs an expandable structure 12 with a larger contact area, such as a balloon 12, to compress the body lumen without causing excessive irritation to the local body lumen, such as for blood vessels, which may reduce the risk of intimal hyperplasia in the blood vessel after the procedure. The utility model discloses a body cavity adjusting device 1 can realize short-term internal lieing in, like the carotid intimal stripping postoperative, in order to reduce the high damage risk of filling to the brain, can use this body cavity adjusting device 1 to carry out the interim current-limiting of carotid artery postoperative, and at the in-process of current-limiting, the continuous regulation of blood flow is realized in the control of accessible sacculus 12 sufficient state, and easy operation is controllable. The utility model discloses in only need take out cable 13 and can remove spacing to the body cavity, it is convenient to remove the process, and safe and reliable, compare in the winding mode of traditional silk thread, it still can carry out unblock, blood flow control and the operation of refluence after the wound is sewed up, need not to carry out the unblock under visual environment and remove, the risk that the winding was knoed can not appear yet, has improved security and maneuverability greatly, provides more nimble changeable postoperative treatment scheme for the art formula of difference.

Referring to FIGS. 8 and 9, the body cavity adjusting apparatus 1 according to the second embodiment of the present invention differs from the first embodiment in that the catheter 11 includes a first opening 11b formed in the tubular wall 111 on the proximal side of the expandable stent 12 and a second opening 11d formed in the tubular wall 111 on the distal side of the expandable stent 12; the first opening 11b and the second opening 11d are both communicated with the lumen 1121, and the cable 13 is passed out of the first opening 11b and into the second opening 11 d. The cable 13 entering from the second opening 11d passes through the lumen 1121 and may finally protrude through the distal opening 11 a.

In this embodiment, the cable 13 does not need to extend from the distal opening 11a along the curved catheter 11, so the distal end of the catheter 11 can be curved in advance, for example, by pre-shaping, so that the catheter 11 is more convenient for the operator to operate when fixing the blood vessel or other body cavity 2, and the body cavity 2 can be limited without using additional action to bend the catheter. The bending is adjusted in advance, the hardness of the far end of the catheter 11 can be reduced, so that the fitting relation between the catheter 11 and the body cavity 2 can be optimized, the catheter can be easily pulled away from the position of the target body cavity 2 after being released, the stimulation to the body cavity 2 is reduced, and the high hardness of the near end is more convenient for a doctor to hold and operate. The design of counterpoint opening between first opening 11b and the second opening 11d makes single pipe 11 can be used to the patient of different vascular 2 diameters, only need adjust pipe 11 the complete radian can, to complicated changeable patient crowd, need not to prepare the expansion that multiple specification can realize application scope, has reduced stock pressure for hospital and enterprise.

Referring to fig. 10, the body cavity adjusting apparatus 1 according to the third embodiment of the present invention is different from the first embodiment in that the catheter 11 further includes a third opening 11e provided near the first opening 11b, and the third opening 11e communicates with the lumen 1121. In this embodiment, the cable 13 extending from the distal opening 11a can be inserted back into the lumen 1121 through the first opening 11b, or can be inserted back into the lumen 1121 through the third opening 11 e. The size of the bend defining region of the conduit 11 can be varied by using different opening penetrations. From this to the patient of different body cavity diameters, only need adjust the opening that cable 13 used can, to complicated changeable patient crowd, need not to prepare multiple specification and can realize application scope's expansion, reduced stock pressure for hospital and enterprise.

Referring to fig. 11, the body cavity adjustment device 1 according to the fourth embodiment of the present invention differs from the third embodiment in that the expandable mechanism 12 includes two

balloons

121 and 122 spaced apart in the axial direction H, and both

balloons

121 and 122 are disposed between the distal opening 11a and the first opening 11 b. In operation, when the catheter 11 is bent, the two balloons 12 are inflated simultaneously, compressing or squeezing the body cavity together along the axial direction H. The design of the double saccules can ensure that the length of the pressed surface of the body cavity along the axial direction H is larger, and the stimulation to the body cavity is relieved; in addition, the two balloons can be distributed on two sides of the body cavity along with the bent catheter 11, so that the two balloons can be extruded from two sides simultaneously, the size of a single balloon can be properly reduced on the basis of obtaining the same extrusion effect, the safety of implantation and withdrawal of the device is improved, and the influence of the large balloon on peripheral tissues and the body cavity after filling is reduced.

Referring to fig. 12, the body cavity adjusting apparatus 1 according to the fifth embodiment of the present invention is different from the first embodiment in that the cable 13 is disposed to penetrate through the lumen from the tube wall on one side of the expandable stent 12, and the cable 13 is initially penetrated back through the lumen from the tube wall where the cable 13 penetrates through the lumen after the other side of the expandable stent 12 bypasses the catheter 11. In one embodiment, after the cable 13 extends from the distal opening 11a along the curved catheter 11, the cable is passed around the catheter 11 at the other side of the distal opening 11a relative to the balloon 12, and the catheter 11 is pulled and then still extends from the distal opening 11 a. Both ends of the cable 13 extend from the first connector 141, and the bent state of the catheter 11 can be fixed by fixing both ends, thereby achieving flow restriction or flow interruption of the body cavity by expanding the balloon 12.

Referring to fig. 13 and 14, the body lumen adjusting device 1 according to the sixth embodiment of the present invention is different from the first embodiment in that the expandable mechanism includes an expandable mesh body such as a woven mesh body or an expandable cutting mesh body. In one embodiment, expandable stent 12 comprises an expandable braided mesh 12a and a push rod 12b, wherein mesh 12a comprises a braided mesh 12a1 braided from memory wire, a seal 12a2 to distally restrain the braided mesh, and a steel sleeve 12a3 to proximally restrain the braided wire, steel sleeve 12a3 is connected to the distal end of push rod 12b, and the other end of push rod 12b is extendable outside the body for actuation control. The catheter 11 comprises an axial lumen 1121 and an adjustment lumen 1123, an opening 11f is provided on the wall of the catheter 11 in communication with the adjustment lumen 1123, and the lumen 1121 is used for accommodating a cable (not shown) in accordance with the previous embodiment. The mesh body 12a1 is made of metal material, such as stainless steel or nickel titanium alloy, when the push rod 12 is driven to move towards the far end, the sealing head 12a2 abuts against the tube wall, so as to press and expand the mesh body 12a1, and the pressed and expanded mesh body 12a1 can press the body cavity (such as blood vessel) through radial supporting force after extending from the opening 11f, so as to change the flow rate and flow rate of the body fluid in the body cavity by changing the sectional area of the body cavity. Upon completion, the push rod 12b is pulled back proximally, causing the mesh body 12a1 to retract and retract from the opening 11f into the adjustment lumen 1123.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A body cavity adjustment device, comprising:

an expandable mechanism fixedly sleeved on the catheter; and

the cable is movably arranged in the tube cavity in a penetrating mode and configured to penetrate out of the tube cavity from the tube wall on one side of the expandable mechanism, and the catheter is bent relative to the expandable mechanism and then penetrates back to the tube cavity from the tube wall.

2. The body cavity adjustment device of claim 1, wherein the expandable mechanism comprises at least one balloon.

3. The body cavity adjustment device of claim 2, wherein the expandable mechanism comprises two balloons that are axially spaced apart.

4. The body lumen conditioning device of claim 1, wherein the expandable mechanism comprises an expandable braided mesh or an expandable cutting mesh.

5. The body cavity adjustment apparatus of claim 1, wherein the cable is configured to extend through the lumen from the wall on one side of the expandable structure, and to extend back through the lumen from the wall on the other side of the expandable structure after bending the catheter relative to the expandable structure.

6. The body cavity adjustment apparatus of claim 5, wherein the catheter comprises a distal opening and a first opening in a wall of the tube proximal of the expandable structure; the distal opening and the first opening are both in communication with the lumen, and the cable passes out of the distal opening and through the first opening.

7. The body cavity adjustment apparatus of claim 5, wherein the catheter comprises a first opening in the wall of the tube on the proximal side of the expandable structure and a second opening in the wall of the tube on the distal side of the expandable structure; the first opening and the second opening are both communicated with the lumen, and the cable passes out of the first opening and into the second opening.

8. The body cavity adjustment device according to claim 6 or 7, wherein the catheter further comprises a third opening provided in the vicinity of the first opening; the third opening is in communication with the lumen.

9. The body cavity adjustment apparatus of claim 1, wherein the cable is configured to pass out of the lumen from the tube wall on one side of the expandable mechanism and to pass back into the lumen from the tube wall where the cable passes out of the lumen after passing around the catheter on the other side of the expandable mechanism.

10. The body cavity adjustment device of claim 1, wherein the catheter comprises a first section and a second section in order from the distal end to the proximal end in the axial direction, the first section having a hardness less than a hardness of the second section, the expandable mechanism being fixedly sleeved on the first section.