Body cavity regulation device

Abstract

The present invention relates to a body cavity regulating device, comprising a catheter, which includes a first section and a second section in sequence from the distal end to the proximal end along the axial direction, the first section being adjustable relative to the axial direction, the catheter including a first tubular cavity along the axial direction; an expandable mechanism provided on the first section, configured to be continuously contractible and continuously expandable; and a limiting mechanism, comprising a buckle and a guide wire assembly detachably connected to the buckle, the guide wire assembly being movably inserted into the first tubular cavity, and when the buckle is mated with the guide wire assembly, the buckle is located in the first section, and the connection between the buckle and the guide wire assembly is located in the second section. The device only needs to adjust the curvature of the first section to hook the expandable mechanism and the body cavity, and the first section and the second section can be fixed to stabilize the body cavity through the detachable connection between the buckle and the guide wire assembly, and the fixation between the first section and the second section can be released after the flow is limited, thereby releasing the body cavity. The device has a simple structure and is easy to operate, which reduces the difficulty of the operation and the risk during the operation.

Description

Technical Field

[0001] The present invention relates to the field of interventional medical devices, and in particular to a body cavity regulating device. Background Art

[0002] Atherosclerosis is the most common cause of carotid artery stenosis in middle-aged and elderly patients. Patients often have other risk factors that predispose them to cardiovascular and cerebrovascular damage, such as hypertension, diabetes, hyperlipidemia, obesity, and smoking. Atherosclerosis is caused by the accumulation of lipids in the blood vessel walls. Macrophages within these walls engulf these lipids, forming lipid pools. This pools are accompanied by the formation of a fibrous cap. These lipid cores and caps form the primary components of atherosclerotic plaques in the arterial wall. Gradual enlargement of the plaques can lead to gradual narrowing of the vessel lumen, or the plaques can become unstable and rupture, exposing the lipid components within the plaques to the vessel lumen, leading to platelet aggregation, thrombus formation, and subsequent thrombus dislodgement. All of these factors can lead to cerebral ischemia.

[0003] Carotid artery stenosis caused by atherosclerosis is often located at the terminal end of the common carotid artery, including the origin of the internal carotid artery, the siphon of the internal carotid artery, and the terminal internal carotid artery, which is divided into the anterior and middle cerebral artery segments. Patients with severe stenosis and symptomatic moderate stenosis typically require surgical treatment with carotid endarterectomy (CEA) to remove the atherosclerotic plaque. During this procedure, the common carotid artery is blocked, and the target vessel is opened to remove the plaque and thickened intima. While CEA is generally effective in removing the plaque and intima, the sudden change in hemodynamics during occlusion of the common carotid artery can often lead to complications such as cerebral hyperperfusion syndrome (CHS). Clinical manifestations of CHS include throbbing headaches in the frontal, temporal, and periorbital regions (sometimes diffuse); pain in the eye and face; nausea, vomiting, impaired consciousness, cerebral edema, and visual impairment; seizures; functional neurological impairment; and intracranial or subarachnoid hemorrhage. CHS can have serious and even life-threatening consequences if not properly diagnosed and treated. It is generally believed that the sudden opening of blood vessels after carotid artery surgery causes some patients with insufficient cerebral vascular autoregulation to develop hyperperfusion-related complications such as CHS.

[0004] Similar complications also occur in the surgical field of portal hypertension in cirrhosis. The incidence of portal vein thrombosis is high after splenectomy and devascularization. This is due to slow portal vein blood flow, which increases intrahepatic sinusoidal pressure. Thrombosis further worsens liver perfusion in patients with portal hypertension, impairing liver function and causing gastrointestinal congestion and portal hypertensive gastropathy. In some patients, elevated portal vein pressure remains unrelieved, leading to recurrent upper gastrointestinal bleeding. To reduce portal vein pressure and prevent gastrointestinal bleeding, intraoperative flow restriction of the splenic artery is often necessary. Currently, silk thread wrapping is commonly used, but this procedure is complex and can cause significant vascular irritation. Furthermore, flow restriction control is unstable, often resulting in splenic artery occlusion. Summary of the Invention

[0005] In order to solve the adverse reactions caused by sudden pressure changes in the body cavity after being squeezed or compressed, the present application provides a body cavity adjustment device, including:

[0006] The catheter includes a first section and a second section in sequence from the distal end to the proximal end along the axial direction, the first section is adjustable relative to the axial direction, and the catheter includes a first lumen along the axial direction;

[0007] an expandable mechanism disposed on the first section, the expandable mechanism being configured to be continuously contractible and continuously expandable; and

[0008] The limiting mechanism includes a buckle and a guide wire assembly detachably connected to the buckle. The guide wire assembly is movably arranged in the first tube cavity. When the buckle is connected with the guide wire assembly, the buckle is located in the first section, and the connection between the buckle and the guide wire assembly is located in the second section.

[0009] Preferably, the guidewire assembly includes a guidewire movably arranged in the first tube cavity, and a first opening for a buckle to pass through is provided on the tube wall of the second section. The buckle and the guidewire assembly are detachably connected by configuring the guidewire to pass through the buckle.

[0010] Preferably, the guidewire assembly includes a guidewire movably arranged in the first tube cavity and a connecting pin mechanism connected to the distal end of the guidewire. A first opening for a buckle to pass through is provided on the tube wall of the second section, and the buckle and the guidewire assembly are detachably connected by configuring the connecting pin mechanism to pass through the buckle.

[0011] Preferably, the connecting pin mechanism includes an axial base, a column arranged on the base, and a connecting piece connected to the column and arranged axially; the guide wire is connected to the column, and there is a gap between the connecting piece and the base, and the connecting piece is configured to pass through the buckle to achieve a detachable connection between the buckle and the guide wire assembly.

[0012] Preferably, the connecting pin mechanism further comprises a stopper provided on the base, the stopper being axially located on the other side relative to the column, and the side surface of the stopper facing the column is an inclined surface.

[0013] Preferably, the buckle is fixedly connected to the first section.

[0014] Preferably, the body cavity regulating device further comprises a pull wire, the buckle is connected to the distal end of the pull wire, and the pull wire and the buckle are movably arranged together in the first tubular cavity.

[0015] Preferably, the expandable mechanism comprises at least one balloon fixedly mounted on the first section.

[0016] Preferably, the catheter further comprises a second lumen, and the second lumen is communicated with the balloon.

[0017] Preferably, the expandable mechanism is fixedly mounted on the first section, and the expandable mechanism comprises an expandable braided mesh or an expandable cutting mesh.

[0018] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0019] When using the body cavity regulating device of the present invention, it is only necessary to adjust the curvature of the first section to hook the expandable mechanism and the body cavity. The first section and the second section can be fixed to stabilize the body cavity through the detachable connection of the ring buckle and the guide wire assembly. After the flow is limited, the fixation between the first section and the second section can be released to release the expandable mechanism and the body cavity.

[0020] The device has a simple structure and is easy to operate, which reduces the difficulty of surgery and avoids the risks caused by complicated surgical operations as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] In the attached figure:

[0024] Figure 1 is a schematic structural diagram of a body cavity regulating device according to a first embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A schematic diagram of the body cavity adjustment device in the embodiment of the present invention when engaging with the body cavity hook;

[0026] Figure 3A yes Figure 1A schematic diagram of a buckle of the body cavity regulating device in a specific embodiment;

[0027] Figure 3B yes Figure 1 A schematic diagram of the buckle of the body cavity regulating device in another specific embodiment;

[0028] Figure 4 is a schematic structural diagram of a body cavity regulating device according to a second embodiment of the present invention;

[0029] Figure 5 yes Figure 4 A schematic structural diagram of a guidewire assembly of a mid-body cavity regulating device;

[0030] Figure 6 yes Figure 4 Schematic diagram of the structure of the mid-body cavity adjustment device after the buckle is connected to the guide wire assembly;

[0031] Figure 7 yes Figure 4 Schematic diagram of the structure of the mid-body cavity adjustment device after the buckle and the guide wire assembly are disconnected;

[0032] Figure 8 It is a schematic structural diagram of a body cavity regulating device according to the third embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now 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", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0034] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, 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.

[0036] In describing 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, while the distal end refers to the end farther from the operator; and the axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the medical device. The above definitions are for convenience only and are not to be construed as limitations of the present invention.

[0037] See Figure 1 - Figure 3, according to the first embodiment of the present invention, the body cavity regulating device 1 comprises:

[0038] The catheter 11 includes a first section 111 and a second section 112 from the distal end to the proximal end along the axial direction H. The first section 111 is bendable relative to the axial direction H. The catheter 11 includes a first lumen 113 along the axial direction H.

[0039] An expandable mechanism 12 provided on the first section 111, the expandable mechanism 12 being configured to be continuously contractible and continuously expandable; and

[0040] The limiting mechanism 13 includes a buckle and a guide wire assembly 132 detachably connected to the buckle. The guide wire assembly 132 is movably arranged in the first tube cavity 113. When the buckle and the guide wire assembly 132 are connected, the buckle is located in the first section 111, and the connection point A between the buckle and the guide wire assembly 132 is located in the second section 112.

[0041] During open surgery, at the target body cavity 2, such as the target blood vessel, the curvature of the first section 111 is adjusted so that it can hook the body cavity 2 outside the body cavity 2. After hooking, the guide wire assembly 132 and the buckle are operated to connect the two. After connection, the buckle is located in the first section 111, and the connection between the buckle and the guide wire assembly 132 is located in the second section 112. In this way, the first section 111 is fixed relative to the second section 112 at the second section 112, so that the body cavity 2 can be stably limited in the curved first section 111. After fixation, the expandable mechanism 12 is controlled to start expanding. During the expansion process, the expandable mechanism 12 gradually compresses the outer wall of the body cavity 2, thereby squeezing the body cavity 2 to achieve flow limitation or even flow cessation of the body fluid B in the body cavity 2. For example, temporary compression and hemostasis of blood vessels can be achieved, and adjustable flow limitation of blood during surgery can also be achieved.

[0042] After completion, the expansion state of the expandable mechanism 12 is adjusted again to remove its pressure on the body cavity 2; the buckle is disconnected from the guidewire assembly 132, allowing the first section 111 to be freely adjustable. By changing the curvature of the first section 111, the first section 111 can be withdrawn from the body cavity 2, thereby restoring the flow of body fluid B in the body cavity 2. For example, this can restore blood flow after surgery, thereby protecting the end of the blood vessel, the brain, or internal organs. After surgery, the body cavity adjustment device 1 can be safely withdrawn through a smaller incision, thereby avoiding multiple injuries to the patient's incision.

[0043] In the above operation, it is only necessary to adjust the curvature of the first section 111 to hook the expandable mechanism 12 and the body cavity 2. Through the detachable connection between the ring buckle 131 and the guide wire assembly 132, the first section 111 and the second section 112 can be fixed to stably limit the body cavity 2, and after the flow is limited, the fixation between the first section 111 and the second section 112 is released, and the body cavity 2 is released. The device has a simple structure and is easy to operate, which reduces the difficulty of the operation and avoids the intraoperative risks caused by complicated surgical operations as much as possible.

[0044] In this embodiment, the catheter 11 may be an extruded tube made of a polymer material, such as segmented polyetheramide (PEBAX) or polyurethane (PU). The length and diameter of the catheter 11 can be adjusted based on the application scenario. For example, in one exemplary application, the catheter 11 has an effective length of 110 mm and a diameter of 8F (2.7 mm). The distal end of the catheter 11 can be pre-curved by plasticizing the distal end, so that the first segment 111 of the distal end is pre-bent relative to the axial direction H. In this embodiment, the first segment 111 is an arc-shaped segment that can be bent under the action of an external force. The resulting curvature can be 360°, 270°, or 210°, among other degrees. The distal end of the first segment 111 can be opened to form a gap with the second segment 112, or it can form a closed loop relative to the second segment 112. The aforementioned curvatures are provided for illustrative purposes only and are not intended to limit the present invention. A person skilled in the art can select an appropriate curvature as needed.

[0045] The catheter 11 can also be a multi-lumen extruded tube, in which multiple lumens along the axial direction H can be formed during the extrusion molding process, such as the first lumen 113. The first lumen 113 can be embedded in the first section 111 and the second section 112 at the same time, thereby connecting the first section 111 and the second section 112. The cross-section of the first lumen 113 perpendicular to the axial direction H can be circular, elliptical, oblong, rectangular, or other specially designed shapes. The multi-lumen configuration of the catheter 11 can achieve a variety of uses, such as a guidewire 132 lumen for the passage of a guidewire 132, a lumen for liquid flushing or blood aspiration, etc.

[0046] The body cavity regulating device 1 further includes a first connector 141 , which is connected to the proximal end of the catheter 11 and has a first inner cavity 14a therein that communicates with the first lumen 113 .

[0047] The guidewire assembly 132 includes a guidewire 132 that is movably disposed within the first lumen 113. A first opening 11a is provided on the wall of the second section 112 for a loop 131 to pass through. The first opening 11a is in communication with the first lumen 113. By configuring the guidewire 132 to pass through the loop 131, a detachable connection between the loop 131 and the guidewire assembly 132 is achieved. Specifically, the guidewire 132 may be a multi-strand metal wire, such as a multi-strand stainless steel wire. The guidewire 132 may pass through the first lumen 14a of the first connector 141 and into the first lumen 113. The guidewire 132 may be advanced distally or retracted proximally within the first lumen 113.

[0048] The buckle includes a fixing section 1311 and a connecting section 1312. The fixing section 1311 is connected to the distal end surface of the first section 111 of the catheter 11 to achieve a fixed connection with the first section 111; the connecting section 1312 has a through hole 131a for the guide wire 132 to pass through or pass through. Figure 3AIn one embodiment, a stainless steel wire or a plurality of stainless steel cables may be used to form a through hole 131a segment, and the stainless steel wire or stainless steel cable may be used to form the through hole 131a; see Figure 3B In another specific embodiment, the connecting section 1312 is formed by punching a metal sheet, and the metal sheet can be made of stainless steel.

[0049] During the operation, the first section 111 is first bent so that the distal end face of the first section 111 is located adjacent to the second section 112. The buckle 131 is then inserted into the first lumen 113 through the first opening 11a. The through hole 131a of the buckle 131 is located substantially perpendicular to the axial direction H within the first lumen 113. A guide wire 132 is controlled to penetrate into the first lumen 113 and pass through the through hole 131a of the buckle 131 during distal advancement. Once the guide wire 132 passes through the through hole 131a, the bent first section 111 is fixed relative to the second section 112. When the guide wire 132 is withdrawn proximally, it passes through the through hole 131a, releasing the connection between the buckle 131 and the guide wire 132. The buckle 131 is then withdrawn, and the first section 111 returns to a freely adjustable state. For example, the first section 111 can be released to release the restraint on the body cavity 2.

[0050] The expandable mechanism 12 is a continuously expandable and continuously contractible mechanism, which is fixedly mounted on the first section 111. In this embodiment, the expandable mechanism 12 includes a balloon 12. The balloon 12 can be gradually adjusted from an initial unfilled state to a maximum filled state, or the filled balloon 12 can be depressurized to gradually reduce its size or volume, thereby achieving continuous adjustment of the size or volume of the expandable mechanism 12 through the filling adjustment of the balloon 12. The balloon 12 can be a non-compliant balloon 12 made of nylon material, and the filling diameter of the balloon 12 is 6-12 mm, for example, 8 mm. The balloon 12 can also be a flexible long-segment balloon 12 to cover the entire first section 111, rather than unilateral squeezing. This method can further reduce stimulation to the body cavity 2. An eccentric balloon 12 can also be used to reduce the impact on surrounding tissues.

[0051] See also Figure 1 and Figure 2The balloon 12 is sheathed on the outer wall of the first section 111. Correspondingly, the catheter 11 further includes a second lumen 114 disposed within the catheter wall and a second opening 11b formed in the catheter wall. The second lumen 114 communicates with the balloon 12 through the second opening 11b. The second lumen 114, along the axial direction H, is one of the extruded lumens described above. The inner diameter of the second lumen 114 is 0.3-0.7 mm, for example, 0.5 mm in this embodiment. The body cavity regulating device 1 also includes at least one Luer connector 142, which is connected to the catheter 11 at the proximal end of the second section 112. The second inner cavity 14b of the Luer connector 142 is connected to the second lumen 114. The filling liquid can fill the balloon 12 through the Luer connector 142 and the second lumen 114 to increase its volume or size. The filling liquid of the balloon 12 can also flow out from the second lumen 114 and the Luer structure to relieve pressure. During the pressure relief process, the volume or size of the balloon 12 gradually decreases to adjust the expansion state.

[0052] See also Figure 2 After first section 111 is hooked onto body cavity 2 and secured relative to body cavity 2 via guidewire assembly 132 and buckle 131, balloon 12 is initially uninflated. Second lumen 114 communicates with balloon 12 via second opening 11b, and filling fluid enters balloon 12 via filling catheter 11 and second opening 11b, thereby inflating balloon 12. The inflated balloon 12 gradually compresses body cavity 2, thereby adjusting the size or volume of balloon 12 through inflation, thereby limiting or blocking the flow of body fluid BB within body cavity 2.

[0053] The above expandable mechanisms 12 are used as examples and are not limitations of the present invention. Ordinary technicians in this field can select a suitable expandable mechanism according to actual needs. For example, the expandable mechanism 12 can also include two balloons 12 spaced apart along the axial direction H, and the two balloons 12 are both provided on the first section 111. During operation, after the catheter 11 hooks and fixes the body cavity 2, the two balloons 12 can be filled at the same time, and the body cavity 2 can be compressed or squeezed together around the axial direction H. The design of the double balloons 12 can make the compressed surface of the body cavity 2 longer around the axial direction H, thereby alleviating the stimulation to the body cavity 2; in addition, the two balloons 12 can be distributed on both sides of the body cavity 2 following the bent catheter 11, so that they can be squeezed from both sides at the same time. In this way, on the basis of obtaining the same squeezing effect, the size of a single balloon 12 can be appropriately reduced, thereby improving the safety of the insertion and withdrawal of the device and reducing the impact of the large balloon 12 on the surrounding tissues and the body cavity 2 after filling.

[0054] For another example, the expandable mechanism 12 may also include an expandable mesh, such as a braided mesh or a cut mesh. The mesh may be braided from a metal material or cut from a metal tube, such as stainless steel or nickel-titanium alloy. After the mesh is squeezed and expanded, it can compress the body cavity 2 (e.g., a blood vessel) through radial support force, thereby changing the flow rate and flow rate of the body fluid B within the body cavity 2 by changing the cross-sectional area of the body cavity 2. Other expandable mechanisms 12 are not listed here. Any body cavity regulating device 1 configured with various expansion mechanisms based on the teachings of the present invention is within the scope of protection of the present invention.

[0055] The body cavity regulating device 1 of the present invention has an adjustable curvature of the first section 111, which allows the first section 111 to hook the body cavity 2, so that a space is formed by its bending to limit the deformation of the body cavity 2. Through the detachable connection between the guide wire 132 and the buckle 131, the first section 111 can be temporarily fixed relative to the second section 112, so that the bending limit space of the first section 111 remains unchanged, thereby stably limiting the body cavity 2 within the bending space. In combination with the expandable mechanism 12, the body cavity 2 can be expanded and compressed or expanded and retracted to release the compression, thereby achieving continuous regulation of the flow of body fluid B in the body cavity 2 and blocking the flow of body fluid B. When the flow limitation or blocking is completed, the connection between the guide wire 132 and the buckle 131 can be released to release the body cavity 2 and restore the flow of body fluid B. When the body cavity 2 is a blood vessel, it can be called a target blood vessel during operation, that is, the flow of blood in the blood vessel can be regulated and the flow of blood can be blocked.

[0056] During operation, it is only necessary to inflate or depressurize the balloon 12 and to manipulate the curvature of the first section 111. It is highly safe and easy to operate. The present invention uses an expandable mechanism 12 with a larger contact area, such as a balloon 12 to compress the body cavity 2, which will not cause excessive stimulation to the local body cavity 2. For example, for blood vessels, it can reduce the risk of postoperative vascular intimal hyperplasia. The body cavity regulating device 1 of the present invention can be retained in the body for a short period of time. For example, after carotid endarterectomy, in order to reduce the risk of brain damage caused by high perfusion, the body cavity regulating device 1 can be used for temporary flow limitation after carotid artery surgery. In the process of flow limitation, the blood flow can be continuously adjusted by controlling the filling state of the balloon 12. The operation is simple and controllable. In the present invention, it is only necessary to operate the guide wire assembly 132 and the buckle 131 provided on the first section 111 to realize and release the limitation of the body cavity 2. The operation is convenient, safe and reliable. Compared with the traditional silk thread winding method, it can still perform unlocking, blood flow regulation and reflow operations after the wound is sutured. There is no need to unlock and remove it in a visual environment, and there is no risk of entanglement and knotting. It greatly improves safety and operability, and provides more flexible and changeable postoperative treatment plans for different surgical procedures.

[0057] See Figure 4-Figure 7Compared with the first embodiment, the difference of the body cavity adjustment device 1 according to the second embodiment of the present invention is that the guide wire assembly 132 includes a guide wire 1321 movably arranged in the first tube cavity 113 and a connecting pin mechanism 1322 connected to the distal end of the guide wire 1321, and a first opening 11a for the ring buckle 131 to pass through is provided on the tube wall of the second section 112. The first opening 11a is connected to the first tube cavity 113, and the detachable connection between the ring buckle 131 and the guide wire assembly 132 is achieved by configuring the connecting pin mechanism 1322 to pass through the ring buckle 131.

[0058] See Figure 5 The connecting pin mechanism 1322 includes a base 1322a extending along the axial direction H, a post 1322b disposed on the base 1322a, and a connector 1322c connected to the post 1322b and disposed along the axial direction H. The guidewire 1321 is connected to the post 1322b, with a gap between the connector 1322c and the base 1322a. The connector 1322c is configured to pass through the ring buckle 131 to achieve a detachable connection between the ring buckle 131 and the guidewire assembly 132. Furthermore, the connecting pin mechanism 1322 also includes a stopper 1322d disposed on the base 1322a. The stopper 1322d is located on the other side of the post 1322b along the axial direction H, and the side of the stopper 1322d facing the post 1322b is an inclined surface 1322e.

[0059] See also Figure 6 First, bend the first section 111 so that the distal end face of the first section 111 is located near the second section 112, and insert the buckle 131 into the first lumen 113 through the first opening 11a so that the through-hole 131a is located substantially perpendicular to the axial direction H within the first lumen 113. The guidewire assembly 132 is controlled to penetrate into the first lumen 113, and the guidewire 1321 pushes the connecting pin mechanism 1322 toward the distal end. When it reaches the buckle 131, due to the gap between the connector 1322c and the base 1322a, the connector 1322c can pass through the through-hole 131a of the buckle 131, thereby limiting the buckle 131 at the connector 1322c. Once the connector 1322c passes through the through-hole 131a, the bent first section 111 can be fixed relative to the second section 112. Figure 7 When the guide wire 1321 is withdrawn toward the proximal end, the connecting piece 1322c passes through the through hole 131a. After the buckle 131 is completely passed through, the inclined surface 1322e of the column 1322b abuts against the buckle 131. As the guide wire 1321 continues to be withdrawn, the inclined surface 1322e gradually pushes up the buckle 131. When the cooperation between the connecting pin mechanism 1322 and the buckle 131 is completely disengaged, the buckle 131 is also automatically pushed out of the first tube cavity 113. The connection between the buckle 131 and the guide wire assembly 132 can be released without manual operation. When the first section 111 returns to a freely adjustable state, the first section 111 can be released to release the limit on the body cavity 2.

[0060] The above-mentioned connecting pin mechanism 1322 is used in conjunction with the ring buckle 131 to achieve a detachable connection. On the one hand, through the cooperation of the base 1322a, the column 1322b and the connecting piece 1322c, the ring buckle 131 can be effectively limited in the gap between the connecting piece 1322c and the base 1322a, and the limiting reliability is high; on the other hand, the inclined surface 1322e of the block 1322d can automatically push out the ring buckle 131 during the retraction of the guide wire 1321, thereby improving the efficiency and success rate of the release, and also improving the operational safety.

[0061] See Figure 8 Compared with the first embodiment, the body cavity regulating device 1 according to the third embodiment of the present invention is different in that the body cavity regulating device 1 further includes a pull wire 1313, a buckle 131 and a distal end of the pull wire 1313 connected to the buckle 131, and the pull wire 1313 and the buckle 131 are movably arranged together in the first lumen 113. The pull wire 1313 can be a flexible steel cable. For example, the pull wire 1313 is a single wire with a distal end connected to the buckle 131. Alternatively, in this embodiment, the pull wire 1313 is formed by bending a flexible steel cable, and the bent portion forms the buckle 131. In order to accommodate the fit between the buckle 131 and the guide wire 132, the bent portion can be rigidified or hardened. Of course, an independent buckle 131 can also be directly connected to the bent portion of the pull wire 1313.

[0062] During operation, the first segment 111 is first bent so that the distal end of the first segment 111 is positioned adjacent to the second segment 112. The pull wire 1313 and the buckle 131 are then inserted into the first lumen 113 through the first connector 141. The pull wire 1313 is then advanced distally, causing the buckle 131 to extend from the distal end of the catheter 11. The extended buckle 131 is then controlled to pass through the first opening 11a and into the first lumen 113 in a manner substantially perpendicular to the axial direction H. The guide wire 132 is then manipulated to penetrate into the first lumen 113 and advanced proximally. The guide wire 132 can pass through the buckle 131 and be positioned at the connector 1322c. Once the guide wire 132 passes through the perforation 131a, it secures the bent first segment 111 relative to the second segment 112. When the guide wire 132 is withdrawn toward the proximal end, the guide wire 132 passes through the buckle 131. After the guide wire 132 is completely withdrawn, the pull wire 1313 is pulled so that the pull wire 1313 drives the buckle 131 to withdraw toward the proximal end. After the first section 111 returns to a freely adjustable state, the first section 111 can be released to release the limitation on the body cavity 2.

[0063] During the above operation, there is no need to operate the first section 111. The connection between the buckle 131 and the guide wire 132 can be completely released by operating the pull wire 1313 at the first joint 141. The operation is simple. At the same time, the pull wire 1313 is pulled to actively separate the buckle 131 from the first opening 11a, and then the buckle 131 is pulled into the first lumen 113 of the catheter 11, thereby avoiding scratches between the buckle 131 and the outer wall of the body cavity 2 or adjacent tissues, thereby improving the safety of the removal process.

[0064] It is understandable that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A body cavity regulating device, characterized in that: include: A catheter, the catheter including a first section and a second section in order from a distal end to a proximal end along the axial direction, the first section being adjustable relative to the axial direction, and the catheter including a first lumen along the axial direction; an expandable mechanism provided on the first section, the expandable mechanism being configured to be continuously contractible and continuously expandable; and a limiting mechanism, the limiting mechanism comprising a buckle and a guidewire assembly detachably connected to the buckle, the guidewire assembly being movably disposed in the first lumen, and when the buckle is engaged with the guidewire assembly, the buckle is located in the first section, and the connection between the buckle and the guidewire assembly is located in the second section; The guidewire assembly includes a guidewire movably inserted into the first lumen and a connecting pin mechanism connected to the distal end of the guidewire. The wall of the second section is provided with a first opening for the ring buckle to pass through. The connecting pin mechanism is configured to pass through the ring buckle to achieve a detachable connection between the ring buckle and the guidewire assembly. The body cavity regulating device further includes a pull wire, the buckle is connected to the distal end of the pull wire, and the pull wire and the buckle are movably inserted into the first lumen together; The expandable mechanism includes at least one balloon fixedly mounted on the first segment.

2. The body cavity regulating device according to claim 1, characterized in that: The connecting pin mechanism includes an axial base, a column arranged on the base, and a connecting piece connected to the column and arranged axially; the guide wire is connected to the column, and there is a gap between the connecting piece and the base. The connecting piece is configured to pass through the buckle to achieve a detachable connection between the buckle and the guide wire assembly.

3. The body cavity regulating device according to claim 2, characterized in that: The connecting pin mechanism further comprises a stopper provided on the base, wherein the stopper is axially located on the other side relative to the column, and the side surface of the stopper facing the column is an inclined surface.

4. The body cavity regulating device according to claim 1, characterized in that: The catheter further includes a second lumen in communication with the balloon.

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