Hemostatic assembly and endoscope diagnosis and treatment equipment

Abstract

The embodiment of the present application relates to the technical field of endoscopes, in particular to a hemostatic assembly and an endoscope diagnosis and treatment device. The hemostatic assembly comprises: a retractable support body capable of expanding in a radial direction; an inflatable inner capsule accommodated in the inside of the support body and used for driving the support body to expand; a first connecting pipeline in communication with the inner capsule and used for controlling the inflation and contraction of the inner capsule so as to make the support body expand and form a working channel; an inflatable outer capsule arranged outside the support body; and a second connecting pipeline in communication with the outer capsule and used for controlling the inflation and contraction of the outer capsule. The hemostatic assembly adopts the retractable support body, can form the working channel for the endoscope to pass through by means of the inflation and re-contraction of the inner capsule, and can reach the target position through the natural orifice or the surgical incision in a simple and convenient manner without the need of an additional guiding device, and is convenient for manufacturing and operation.

Description

[Technical Field]

[0001] This invention relates to the field of medical device technology, and in particular to a hemostatic component and an endoscopic diagnostic and treatment device. [Background Technology]

[0002] Endoscopy is a widely used minimally invasive diagnostic and treatment technique in medicine. It utilizes the body's natural openings or small surgical incisions to insert a bronchoscope or similar diagnostic device into the body to assist doctors in diagnosis or treatment. For example, after administering local anesthesia to the patient's throat, a bronchoscope approximately 0.6 cm in diameter is inserted into the patient's trachea through openings such as the mouth, nose, or tracheotomy for examination or treatment.

[0003] However, during endoscopic procedures, acute massive bleeding can easily occur due to various factors, posing a significant threat to the patient's life and health. For example, acute massive bleeding of ≥100ml in the lower respiratory tract caused by bronchoscopic diagnostic or therapeutic procedures (referred to as "bronchoscopy-related massive bleeding") can rapidly obstruct the patient's airway, causing a rapid drop in blood oxygen saturation, and in severe cases, even leading to asphyxiation or hemorrhagic shock and death.

[0004] Traditionally, instruments similar to hemostatic balloons are used to help stop bleeding. For example, Figure 1 The hemostatic balloon 10 shown is composed of a catheter 11 and a balloon 12 located at the tip of the catheter.

[0005] The catheter's distal end communicates with balloon 12, and the catheter is equipped with a balloon filling tube with a switch. The operator can control the injection of fluids such as water through the balloon filling tube into the distal balloon by operating the relevant operating parts 13 exposed outside the patient (such as controllers or switches), causing the distal balloon 12 to expand and achieve airway tamponade for hemostasis. However, while this hemostatic balloon provides pressure for hemostasis, it also obstructs the endoscope's working channel, preventing further insertion of the endoscope.

[0006] Some hemostatic balloons use rigid support structures to create a working channel for the endoscope. However, because the support structure of such hemostatic balloons has a large diameter, they require special guiding devices for insertion, which is inconvenient in both manufacturing and use. [Summary of the Invention]

[0007] The present invention aims to provide a hemostatic component and an endoscopic diagnostic and treatment device that can overcome the defects of existing hemostatic balloons.

[0008] To solve the above-mentioned technical problems, embodiments of the present invention provide the following technical solution: a hemostatic component. The hemostatic component includes:

[0009] A retractable support body that can expand in the radial direction;

[0010] An expandable inner bladder, housed inside the support body, for driving the support body to expand;

[0011] A first connecting pipe, which communicates with the inner bladder, is used to control the expansion and contraction of the inner bladder so that the support expands and forms a working channel with a predetermined aperture.

[0012] An expandable outer capsule disposed outside the support body;

[0013] The second connecting pipe is connected to the outer capsule and is used to control the expansion and contraction of the outer capsule.

[0014] Optionally, the support body includes: a plurality of ring structures having a preset axial length and a connecting structure connecting two adjacent ring structures;

[0015] The plurality of annular structures are connected in series along the axial direction of the support body through the connecting structure to form a tubular structure with open ends.

[0016] Optionally, the annular structure includes:

[0017] A first wave-like body, the first wave-like body having multiple peaks and troughs;

[0018] A second waveform is stacked on top of the first waveform, the second waveform having multiple peaks and troughs;

[0019] The first wave-shaped body and the second wave-shaped body have different connection points on the connecting structure, so that the first wave-shaped body and the second wave-shaped body are arranged alternately.

[0020] Optionally, the crest of the first wave-shaped body is fixed to the first connecting structure; the crest of the second wave-shaped body is fixed to the second connecting structure.

[0021] Optionally, one end of the support gradually changes from the first pipe diameter to the second pipe diameter at the other end.

[0022] Optionally, the connecting structure includes at least one deformable curved section that is stretched as the inner capsule expands;

[0023] The connection structure has a maximum pipe diameter determined by the tensile limit of the bend.

[0024] Optionally, the distance between the connecting structure and one end opening of the support body is negatively correlated with the maximum diameter of the connecting structure.

[0025] Optionally, the support extends through the outer capsule, and the openings at both ends of the support are fixedly connected to at least a portion of the outer capsule;

[0026] The outer capsule has a contracted state that is attached to the outer surface of the support body.

[0027] Optionally, the hemostatic assembly further includes a guidewire for guiding the hemostatic assembly; the guidewire passes through the support.

[0028] To address the aforementioned technical problems, embodiments of the present invention also provide the following technical solution: an endoscopic diagnostic and treatment device. This endoscopic diagnostic and treatment device includes a hemostasis component as described above and an endoscope; the endoscope passes through the working channel formed by the expansion of the support body of the hemostasis component.

[0029] The hemostatic component of this invention employs a retractable support body, which can expand and then retract to form a working channel for the endoscope. Furthermore, when retracted, the support body has a small inner diameter, allowing it to easily reach the target location through natural body orifices or surgical incisions without requiring additional guiding devices, thus simplifying fabrication and operation. [Attached Image Description]

[0030] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0031] Figure 1 A schematic diagram of an existing hemostatic balloon;

[0032] Figure 2 This is a schematic diagram of the hemostatic component provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the support provided in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram illustrating the operation process of the hemostatic component provided in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of a guidewire-guided hemostasis assembly according to another embodiment of the present invention.

[0036] Figure 6 for Figure 5The diagram shows an enlarged view of part A.

[0037] Figure 7 This is a partial structural schematic diagram of a support provided in another embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the flat plate component provided in an embodiment of the present invention.

Detailed Implementation Methods

[0039] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0041] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Figure 2 This is a cross-sectional view of a hemostatic component provided in an embodiment of the present invention. Figure 1 As shown, the hemostatic assembly may include: a retractable support 100, an inflatable inner bladder 200, a first connecting tube 300, an inflatable outer bladder 400, and a second connecting tube 500.

[0043] The support 100 is a retractable device capable of expanding radially. In its initial state, it has a small cross-sectional area and sufficient axial rigidity to meet usage requirements, allowing it to easily reach the target location where hemostasis is needed through natural human orifices or surgical incisions.

[0044] After moving to the target position, the support 100 in its initial state expands radially under the drive of the inner bladder, thus entering an expanded state. In the expanded state, the support 100 has a significantly increased cross-sectional area and sufficient radial rigidity compared to its initial state, which can support the formation of a working channel with a predetermined aperture through which an endoscope can pass.

[0045] The predetermined aperture is an empirical value that can be determined by technicians based on actual needs. It should be noted that the predetermined aperture is not a fixed value and may have different forms of representation depending on the structure of the support. It only needs to meet the requirements of use and have sufficient space for endoscopes and similar diagnostic and treatment equipment to pass through.

[0046] For example, to adapt to the characteristic that the bronchi and their branches continuously narrow, such as Figure 3 As shown, in some embodiments, the support can be designed with a structure having a gradually decreasing pipe diameter. In other words, one end of the support can gradually shrink from a larger first pipe diameter r1 to a smaller second pipe diameter r2 at the other end, forming a wedge-shaped or frustum-shaped form.

[0047] The specific degree of gradation or the parameters of the first and second pipe diameters can be set or determined by technicians according to the actual application requirements. For example, when applied to the left and right main bronchi, the diameter is narrowed by 8-10% per centimeter in the axial direction, or when applied to the right upper bronchus, the diameter is narrowed by 40-50% per centimeter.

[0048] Figure 3 This is a schematic diagram of the structure of the support 100 provided in an embodiment of the present invention. In some embodiments, such as... Figure 3 As shown, the support 100 includes a plurality of annular structures 110 with a preset axial length and a connecting structure 120 connecting two adjacent annular structures.

[0049] The annular structure 110 is formed by connecting end-to-end support walls of a certain width. Multiple annular structures 110 are connected in sequence to form a tubular structure with open ends.

[0050] Specifically, different annular structures 110 can have the same axial length or different axial lengths. The axial length of the annular structure 110 is an empirical value and can be set by technicians according to the actual needs.

[0051] The connecting structure 120 is an annular ring used to connect two adjacent annular structures 110. Specifically, it can be fixedly connected to the annular structure 110 in any suitable way, such as a simple one-piece molding method.

[0052] In some embodiments, in addition to being disposed between two adjacent annular structures 110, the connecting structure 120 may also be further disposed at the openings at both ends of the support to help form openings with a specific pipe diameter.

[0053] Please continue reading. Figure 3 In the support 100, the annular structure 110 is the main part, while the connecting structure 120 has a smaller axial length h relative to the annular structure 110, and is a narrower, elongated part. The specific length of the support 100 depends mainly on the number of annular structures 110 and their axial length.

[0054] In other embodiments, please continue to refer to Figure 3 The support body 100 may further include a support shaft 130 extending along the axial direction. The support shaft passes through a plurality of connecting rings 120 of the support body 100 to provide better axial rigidity.

[0055] The inner bladder 200 is an expandable component housed inside the support body, which can cause the support body 100 to expand radially by changing its own volume.

[0056] As an expandable component, its size and volume can vary between a contracted state and an expanded state. The contracted state refers to a state with a smaller volume, which can be housed in an unexpanded support. The expanded state refers to a state where the inner bladder 200 has a larger volume, causing the support 100 to expand to its usable state.

[0057] Specifically, the inner bladder 200 can be an elastic component made of rubber or similar materials. It has good elastic deformation capability and can expand to a certain size when liquid or gas is injected, thereby driving the support 100 to expand in the radial direction, or gradually shrink from the expanded state to a smaller volume contracted state after the liquid or gas is pumped out or released from the inner bladder 200.

[0058] The first connecting conduit 300 is a conduit with a specific aperture that communicates with the inner capsule 200. It allows gas or liquid to pass through, enabling fluids such as saline solution to be injected into or flow out of the inner capsule 200, thereby controlling the expansion and contraction of the inner capsule 200.

[0059] Specifically, the first connecting conduit 300 can be a connecting conduit made of plastic or other similar materials. One end is connected to the inner bladder 200, and the other end is connected to an external controller, valve, or other similar control component, which can allow fluids such as saline to be injected into or flow out of the inner bladder 200 under controlled conditions (such as at a specific flow rate or velocity).

[0060] The outer capsule 400 is an expandable component similar to the inner capsule 200, located outside the support 100. The expanded outer capsule 400 can further enlarge the size of the hemostatic component, thereby achieving the effect of compression hemostasis or sealing specific orifices.

[0061] In some embodiments, such as Figure 2 As shown, the support 100 passes through the interior of the outer capsule 400, and the opening edges at both ends of the support 100 are fixed to the outer capsule 400 by adhesive or similar fixed connection methods, and are not closed by the outer capsule 400.

[0062] Therefore, when the outer capsule 400 is made of an elastic material (such as rubber), it will form an elastic membrane layer that adheres to and wraps around the outer surface of the support 100 in the contracted state, thus providing a smooth surface for the hemostasis component.

[0063] In other embodiments, the outer capsule 400 may also be composed of multiple independent balloon structures, and is not limited to... Figure 2 One example is shown. These balloon structures are arranged on the outer surface of the support and are fixedly connected to the outer surface of the support, covering the outer surface of the support to achieve a similar effect of expanding the hemostatic component.

[0064] The second connecting pipe 500 is a pipe that communicates with the outer bladder 400. Similar to the first connecting pipe 300, it is also used to control the expansion and contraction of the outer bladder 400 by injecting or pumping out fluids such as gas or liquid.

[0065] Specifically, when using saline or similar liquids as a medium to control the volume changes of the inner capsule 200 and outer capsule 400, the first connecting pipe 300 and the second connecting pipe 500 can be infusion tubes to allow saline or similar liquids to be injected into the inner capsule 200 and outer capsule 400.

[0066] The hemostatic component provided in this invention has a retractable support as its basic framework. In its initial state, it has a small cross-sectional area and suitable axial rigidity, which allows it to be easily guided through physiological orifices (such as blood vessels, trachea, or gastrointestinal tract) or surgical incisions to the target location, similar to a vascular stent, without requiring a specially designed guiding device. Furthermore, the hemostatic component can expand in use to form a working channel with a larger cross-sectional area, allowing endoscopes or related diagnostic and treatment equipment to pass through.

[0067] Based on the hemostasis component provided in the embodiments of the present invention, the present invention further provides an endoscopic diagnostic and treatment device. This endoscopic diagnostic and treatment device may include: an endoscope and a hemostasis component used in conjunction with it.

[0068] The hemostatic component has a small cross-sectional area in its initial state, which is close to the size of the endoscope, and can be directly inserted into a specific target location using the endoscopic treatment channel.

[0069] Of course, this endoscopic diagnostic and treatment equipment can be further equipped with one or more functional components according to actual needs.

[0070] For example, such as Figure 1 As shown, the controller 13 is located outside the body. The first and second connecting pipes of the hemostatic assembly can be connected to the controller, which controls the injection or discharge of fluids such as saline at a specific flow rate to achieve control over the expansion and contraction of the inner and outer capsules.

[0071] The following description uses tracheoendoscopic diagnosis and treatment as an example to illustrate the specific application process of the endoscopic diagnosis and treatment device provided in this embodiment of the invention. Those skilled in the art will understand that this endoscopic diagnosis and treatment device can also be applied to other similar endoscopic scenarios, such as vascular endoscopy, gastroscopy, or esophagoscopy, and is not limited to tracheoendoscopic diagnosis and treatment.

[0072] When bleeding occurs in the bronchus, the hemostatic component 20 provided in this embodiment of the invention can be inserted into the target location through the endoscopic treatment channel.

[0073] like Figure 4 As shown, after reaching the target position (S0), saline solution is injected into the inner capsule 200 through the first connecting tube 300, causing the inner capsule 200 to gradually expand, thereby driving the support body 100 to expand (S1). After the support body 100 expands from the initial state to the working state, saline solution is further injected into the outer capsule 500 through the second connecting tube 400, causing the outer capsule 500 to expand, further increasing the volume of the hemostatic component (S2), compressing the bronchial wall to achieve hemostasis.

[0074] After the bronchial bleeding stops, saline solution can be withdrawn from the inner capsule 200 through the first connecting tube 300, causing the inner capsule 200 to contract. The contracted inner capsule 200 can be withdrawn from the support body 100 or placed within it. Thus, the expanded support body 100 forms a working channel through which an endoscope can pass. The endoscope can then pass through the hemostasis assembly 20 via this working channel and continue to move distally for examination, evaluation, and treatment. In this embodiment, "distal" refers to the end separated from the controller.

[0075] If bronchial bleeding becomes unstoppable during further endoscopic examination, the endoscope 20 can be withdrawn from the working channel first. Then, the inner capsule 200 and outer capsule 400 are inflated through the first and second connecting tubes to completely seal and block the bronchus or its branches at the target location. This confines the bleeding to one lung or a specific lobe, preventing other unexamined parts of the lung from being submerged in blood, ensuring the patient can breathe, and gaining valuable time to save the patient's life.

[0076] In some embodiments, the hemostatic component may also be compatible with guidewire-guided insertion to accommodate situations where the orifice is particularly narrow. For example... Figure 5 As shown, the guidewire 600 can pass through the support in its initial state to guide the hemostatic assembly and / or endoscope to the target location.

[0077] Since both the inner capsule 200 and the outer capsule 400 are elastic components, it is always expected that the support structure of the hemostatic component can provide sufficient strength to allow the hemostatic component to quickly and easily reach the target position through the endoscopic treatment channel and form a robust working channel at the target position.

[0078] In some embodiments, such as Figure 6 As shown, to provide sufficient strength, the annular structure 110 includes a first wave 111 and a second wave 112.

[0079] The first wave 111 and the second wave 112 are both wave-shaped components composed of multiple consecutive crests and troughs. In this embodiment, "first" and "second" are used only to distinguish between two wave bodies with different layouts in the annular structure 110, and are not used to limit the specific structure of the wave bodies.

[0080] For simplicity, in this embodiment, the protrusion of the corrugated body facing one end is called a "crest," and the depression relative to the crest is called a "valley." The first corrugated body 111 and the second corrugated body 112 are staggered, so that the valleys and crests between them are opposite each other, forming an staggered structural shape to provide sufficient radial stiffness to ensure support for the external airbag.

[0081] Specifically, the interlocking structure between the first wave-shaped body 111 and the second wave-shaped body 112 can be achieved through integral molding or other similar methods. In addition, the two ends of the first wave-shaped body 111 and the second wave-shaped body 112 can be fixed to the support shaft 130 respectively, forming a complete ring structure 120.

[0082] In other embodiments, such as Figure 7As shown, the first wave-shaped body 111 and the second wave-shaped body 112 within the same annular structure 110 can also be arranged in a stacked structure. That is, the first wave-shaped body 111 and the second wave-shaped body 112 are located on different horizontal planes.

[0083] For example, the first wave 111 can be below the second wave 112, or the first wave 111 can be above the second wave 112.

[0084] In this embodiment, as Figure 7 As shown, a peak can be composed of an up segment and a down segment, while the down segment and up segment between two adjacent peaks form a valley.

[0085] The crests and troughs of the first wave 111 and the second wave 112 are the connection points where the annular structure 110 connects to the connecting structure 120. The annular structure 110 and the connecting structure 120 can be fixedly connected through integral molding or a similar method.

[0086] Furthermore, the first wave-shaped body 111 and the second wave-shaped body 112 within the same annular structure 110 have different connection points within the same connecting structure 120, thereby forming a connection between the first wave-shaped body 111 and the second wave-shaped body 112. Figure 6 The layout is similar to the staggered arrangement shown.

[0087] Through this staggered structure and layered arrangement, the first wave-shaped body 111 and the second wave-shaped body 112 can support each other. Therefore, after the support expands, it can provide stronger radial strength to ensure the stable existence of the working channel formed by the support, meeting the usage requirements.

[0088] In some embodiments, please continue reading Figure 7 A connecting structure 120 is fixedly connected to each end of the annular structure 110. For ease of description, in this embodiment, they can be referred to as the first connecting structure 120a and the second connecting structure 120b, respectively.

[0089] In this ring structure 110, the first wave 111 and the second wave 112 can have similar wave shapes. While the crests of the first wave 111 are fixed to the first connecting structure 120a, the crests of the second wave 112 are fixed to the second connecting structure 120b. In other words, the first wave 111 and the second wave 112 are arranged with opposite orientations, and their rising sections (Up) and falling sections (Down) have an alternating shape.

[0090] In other embodiments, the overlapping positional relationship between the first wave body 111 and the second wave body 112 can also be alternated, so that the intersecting rising segments Up and falling segments Down alternately support each other, forming a structure similar to a mesh weave.

[0091] In actual use of the hemostatic component provided in this embodiment, such as Figure 4 As shown, when the outer capsule 400 is also injected with saline solution to expand its volume and the inner capsule 200 is retracted to form a working channel, the support 100 passing through the outer capsule 400 needs to withstand a large internal pressure.

[0092] Therefore, the support 200 needs to have strong radial strength after expansion to ensure that it is not easily crushed by the internal pressure applied by the outer bladder 400. By staggering and / or stacking the first wave-shaped body 111 and the second wave-shaped body 112 provided in the application embodiment, sufficient radial strength can be provided to ensure that the working channel can be stably maintained when the support 100 expands.

[0093] Moreover, although the layered design of the support body described above will form a non-smooth surface, the elastic membrane layer formed by the outer capsule 400 attached to the support body 100 can play a good covering role, avoiding unnecessary damage to the inner wall of the bronchus and other passageways caused by the non-smooth surface of the support body 100 when passing through the trachea, bronchi and other physiological passageways of the human body.

[0094] In some embodiments, a flat sheet can be cut according to a pre-set pattern, and then the cut flat components can be rolled to form a tubular structure identical to the support, thereby preparing multiple components (such as a first wave, a second wave, and a connecting structure) in the support. After the multiple different components are connected and fixed together by a suitable fixing method, the support of the above embodiment is formed.

[0095] For example, such as Figure 8 As shown, multiple flat components A can be formed on a flat sheet using methods such as laser cutting. Figure 8 Taking a wavy body with four peaks as an example, those skilled in the art can choose to set more or fewer peaks according to actual needs, and are not limited to... Figure 8 (As shown in the four examples). Then, the flat plate component A is flipped over and stacked alternately with another flat plate component A, and the intersection points between the two flat plate components are spot welded in place. Finally, the two flat plate components A that are fixedly connected are rolled up to form a tubular structure, which constitutes a ring structure 110 and a connecting structure 120 located at both ends of the ring structure 110.

[0096] In other embodiments, the structure can also be directly fabricated on a tubular component of a certain thickness using etching or similar methods. Figure 3 The support shown is manufactured in a way that eliminates the need to create separate components, instead forming the support as a single piece.

[0097] To achieve the radial expansion and contraction performance of the support 100, such as Figure 6 and 7 As shown, the connection structure 120 of the support may include at least one deformable curved section 121.

[0098] The curved portion 121 maintains a certain curvature in the initial state, forming a ring with a small diameter. As the inner bladder 200 expands, the curved portion 121 is stretched to the designed tensile limit, and the diameter of the formed ring also increases accordingly.

[0099] In some embodiments, the curved portion 121 may be along such a... Figure 6 or Figure 7 As shown, the bend occurs in the plane containing the surface of the support 100. In other embodiments, the bend 121 may further bend in a plane perpendicular to the surface of the support 100, achieving the same effect.

[0100] Specifically, the connection structure 120 can also use a shape similar to a serpentine bend, with multiple bends 121 that bend back and forth to provide sufficient tensile limits, thereby enabling the support 100 to have a sufficient range of pipe diameter variations.

[0101] When the inner bladder 200 expands, the support 100 in its initial state receives expansion pressure from the inner bladder 200. The curved portion of the connecting structure 120 is thus stretched until it reaches the designed tensile limit, and the diameter of the resulting annular tube increases accordingly.

[0102] As the diameter of the annular tube formed by the connecting structure 120 continues to increase, the distance between the connection points of the corrugated body that is fixedly connected to the connecting structure is also increased accordingly, thereby expanding the support body to the working state and forming a working channel.

[0103] Those skilled in the art will understand that the maximum diameter of a specific cross-section of the support is determined by the tensile limit of the connecting structure, and different tensile limits can provide different maximum diameters. Therefore, a support 100 with a gradually changing diameter can be achieved by changing the tensile limits of different connecting structures.

[0104] In some embodiments, the distance between the connecting structure 120 and one end opening of the support body can be negatively correlated with the maximum diameter of the connecting structure 120. In other words, an engineer can adjust the tensile limit of the connecting structure based on the distance between the connecting structure and the one end opening, so that the maximum diameter of the connecting structure is larger the farther it is from the one end opening of the support body, thus forming... Figure 3 The support structure shown is gradually narrowing.

[0105] Specifically, assuming the support 100 has N connecting structures 120, and the overall length of the support is L, then, based on the design goal of the gradually narrowing support 100 (e.g., the percentage reduction in the support 100 for every 1 cm), the change in the maximum pipe diameter between the nth and (n-1)th connecting structures can be calculated. Thus, given that the maximum pipe diameter of the first connecting structure is known or determined, the maximum pipe diameter corresponding to each connecting structure 120 in the support 100 can be determined sequentially.

[0106] In some embodiments, the support 100 may be made of any suitable type of metallic material with a certain degree of deformability. The material used to make the support 100 may include tantalum-titanium alloy, nickel-titanium alloy, stainless steel, titanium, or other similar metal alloys or precious metals.

[0107] In some embodiments, please continue reading Figure 6 and Figure 7 Furthermore, an arc segment or similar curved section can be added between the rising section Up and the falling section Down of the wave-shaped structure. This structural design can act like a hinge, making it easier for adjacent rising sections Up and falling sections Down to rotate around the crests or troughs of the wave, thus improving the deformation capacity of the support.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hemostatic component, characterized in that, include: A retractable support body that can expand in the radial direction; The support body includes several ring structures with a preset axial length and a connecting structure connecting two adjacent ring structures. The several ring structures are connected in series along the axial direction of the support body through the connecting structure to form a tubular structure with open ends. An expandable inner bladder, housed inside the support body, for driving the support body to expand; The connecting structure includes at least one deformable curved section, which maintains its curvature in the initial state to form a ring; As the inner bladder expands, the curved portion is stretched to its tensile limit, and the diameter of the annulus also increases accordingly, so that the connecting structure has a maximum diameter determined by the tensile limit of the curved portion. A first connecting pipe is connected to the inner bladder and is used to control the expansion and contraction of the inner bladder so that the support body expands and the inner bladder gradually retracts from the expanded state to the contracted state so that the expanded support body forms a working channel for the endoscope to pass through. An expandable outer capsule disposed outside the support body; The second connecting pipe is connected to the outer capsule and is used to control the expansion and contraction of the outer capsule; The support body passes through the outer capsule, and the openings at both ends of the support body are fixedly connected to at least a portion of the outer capsule; The outer capsule has a contracted state that is attached to the outer surface of the support body.

2. The hemostatic component according to claim 1, characterized in that, The ring structure includes: A first wave-like body, the first wave-like body having multiple peaks and troughs; A second wave body is stacked on top of the first wave body, and the second wave body has multiple peaks and troughs; The first wave-shaped body and the second wave-shaped body have different connection points on the connecting structure, so that the first wave-shaped body and the second wave-shaped body are arranged alternately.

3. The hemostatic component according to claim 2, characterized in that, The connection structure includes: a first connection structure and a second connection structure that are respectively fixedly connected to both ends of the annular structure; The crest of the first wave-shaped body is fixed to the first connecting structure; the crest of the second wave-shaped body is fixed to the second connecting structure, so that the first wave-shaped body and the second wave-shaped body are arranged with opposite orientations.

4. The hemostatic component according to claim 2, characterized in that, One end of the support gradually changes from the first pipe diameter to the second pipe diameter at the other end.

5. The hemostatic component according to claim 1, characterized in that, The distance between the connecting structure and one end opening of the support is negatively correlated with the maximum diameter of the connecting structure.

6. The hemostatic component according to any one of claims 1-5, characterized in that, The hemostasis assembly further includes a guidewire for guiding the hemostasis assembly; The guide wire passes through the support.

7. An endoscopic diagnostic and treatment device, characterized in that, Includes the hemostatic assembly as described in any one of claims 1-6 and an endoscope; the endoscope extends through the working channel formed by the expansion of the support of the hemostatic assembly.

Images