技术领域Technical Field
本发明涉及微导管技术领域，具体涉及一种变径微导管及系统。The present invention relates to the technical field of microcatheters, and in particular to a variable-diameter microcatheter and a system thereof.
背景技术Background Art
在支架的植入过程中，大多数支架是依靠摩擦力进行支架释放或支架回收的。例如Repath血流导向装置，是先将支架套设于推送导丝上，之后将推送导丝和支架挤压并设置于微导管内形成三层结构。During the implantation of stents, most stents rely on friction to release or retrieve them. For example, the Repath blood flow guide device first places the stent on a push guide wire, then squeezes the push guide wire and stent and places them in a microcatheter to form a three-layer structure.
在植入支架之前，首先要选择与支架的尺寸相适配的微导管。如果微导管的内径过大，则可能会出现支架脱载的风险。但如果微导管的内径过小，则无法将支架设置于微导管内进行运输。Before implanting a stent, you must first select a microcatheter that matches the size of the stent. If the inner diameter of the microcatheter is too large, there may be a risk of stent unloading. However, if the inner diameter of the microcatheter is too small, the stent cannot be placed in the microcatheter for transportation.
在一场手术中，如果需要植入两枚不同尺寸、型号的支架，其中，一枚支架需要适配内径为0.027inch的微导管，另一枚支架则需要适配内径为0.021inch的微导管。基于现有的微导管，则需要两根不同内径的微导管，这不仅会增加手术难度，还增加了费用。In an operation, if two stents of different sizes and models need to be implanted, one stent needs to be adapted to a microcatheter with an inner diameter of 0.027 inches, and the other stent needs to be adapted to a microcatheter with an inner diameter of 0.021 inches. Based on the existing microcatheters, two microcatheters with different inner diameters are required, which not only increases the difficulty of the operation, but also increases the cost.
发明内容Summary of the invention
本发明提供了一种变径微导管及系统，以解决在手术中一根微导管无法支持运输多枚不同尺寸、型号的支架的技术问题。The present invention provides a variable diameter microcatheter and a system to solve the technical problem that one microcatheter cannot support the transportation of multiple stents of different sizes and models during surgery.
本发明公开一种变径微导管，该变径微导管包括内壁子管、第一变径子管、柔性形变件，内壁子管具有管腔，管腔可容纳支架及推送导丝，且支架及推送导丝可沿着管腔向近端或远端移动；内壁子管的厚度取值范围为0.01mm～0.05mm；第一变径子管内具有第一变径囊腔，第一变径囊腔用于容纳造影剂或生理盐水；第一变径子管套设于内壁子管；第一变径子管与内壁子管之间形成至少一个变径腔；柔性形变件设置于变径腔内；柔性形变件的长度小于变径腔的长度；The present invention discloses a variable diameter microcatheter, which comprises an inner wall sub-tube, a first variable diameter sub-tube and a flexible deformable member, wherein the inner wall sub-tube has a lumen, the lumen can accommodate a stent and a guide wire, and the stent and the guide wire can move toward the proximal end or the distal end along the lumen; the thickness of the inner wall sub-tube ranges from 0.01 mm to 0.05 mm; the first variable diameter sub-tube has a first variable diameter capsule cavity, and the first variable diameter capsule cavity is used to accommodate a contrast agent or saline; the first variable diameter sub-tube is sleeved on the inner wall sub-tube; at least one variable diameter cavity is formed between the first variable diameter sub-tube and the inner wall sub-tube; the flexible deformable member is arranged in the variable diameter cavity; the length of the flexible deformable member is less than the length of the variable diameter cavity;
通过向第一变径囊腔内注入造影剂，第一变径子管膨胀并挤压柔性形变件以使得柔性形变件发生弹性形变；随着第一变径子管的挤压，柔性形变件的内径逐渐变小，且柔性形变件的长度逐渐变长；柔性形变件发生弹性形变并挤压内壁子管并使得内壁子管的腔径变小，腔径的取值范围为0.43mm～0.70mm，所述腔径的变化范围＜40%。By injecting contrast agent into the first variable diameter sac cavity, the first variable diameter sub-tube expands and squeezes the flexible deformable part to cause the flexible deformable part to undergo elastic deformation; as the first variable diameter sub-tube is squeezed, the inner diameter of the flexible deformable part gradually decreases, and the length of the flexible deformable part gradually increases; the flexible deformable part undergoes elastic deformation and squeezes the inner wall sub-tube to reduce the cavity diameter of the inner wall sub-tube, and the cavity diameter ranges from 0.43mm to 0.70mm, and the cavity diameter variation range is <40%.
进一步的，变径微导管还包括第二变径子管，第二变径子管具有第二变径囊腔，第二变径囊腔用于容纳造影剂或生理盐水；Furthermore, the variable diameter microcatheter further comprises a second variable diameter sub-tube, the second variable diameter sub-tube having a second variable diameter capsule cavity, and the second variable diameter capsule cavity is used to contain a contrast agent or physiological saline;
第二变径子管套设于所述第一变径子管；或，第二变径子管设置于所述第一变径子管与所述内壁子管之间。The second reducing sub-tube is sleeved on the first reducing sub-tube; or the second reducing sub-tube is arranged between the first reducing sub-tube and the inner wall sub-tube.
进一步的，柔性形变件包括：呈管状的金属编织网，套设于内壁子管，且位于变径腔内；或，金属弹簧圈，套设于内壁子管，且位于变径腔内。Furthermore, the flexible deformable member includes: a tubular metal braided mesh, which is sleeved on the inner wall sub-tube and located in the variable diameter cavity; or a metal spring coil, which is sleeved on the inner wall sub-tube and located in the variable diameter cavity.
进一步的，内壁子管采用PTFE材料制成。Furthermore, the inner wall sub-tube is made of PTFE material.
本发明还公开一种变径微导管，该变径微导管包括内壁子管、第一变径子管、柔性形变件、外壁子管，内壁子管具有管腔，管腔可容纳支架及推送导丝，且支架及推送导丝可沿着管腔向近端或远端移动；内壁子管的厚度取值范围为0.01mm～0.05mm；第一变径子管内具有第一变径囊腔，第一变径囊腔用于容纳造影剂或生理盐水；第一变径子管套设于内壁子管；第一变径子管与内壁子管之间形成至少一个变径腔；柔性形变件设置于变径腔内；柔性形变件的长度小于变径腔的长度；外壁子管套设于第一变径子管；The present invention also discloses a variable diameter microcatheter, which comprises an inner wall sub-tube, a first variable diameter sub-tube, a flexible deformable member, and an outer wall sub-tube. The inner wall sub-tube has a lumen, which can accommodate a stent and a guide wire, and the stent and the guide wire can move toward the proximal end or the distal end along the lumen; the thickness of the inner wall sub-tube ranges from 0.01 mm to 0.05 mm; the first variable diameter sub-tube has a first variable diameter capsule cavity, which is used to accommodate a contrast agent or saline; the first variable diameter sub-tube is sleeved on the inner wall sub-tube; at least one variable diameter cavity is formed between the first variable diameter sub-tube and the inner wall sub-tube; the flexible deformable member is arranged in the variable diameter cavity; the length of the flexible deformable member is less than the length of the variable diameter cavity; the outer wall sub-tube is sleeved on the first variable diameter sub-tube;
通过向第一变径囊腔内注入造影剂，第一变径子管向内膨胀并挤压柔性形变件以使得柔性形变件发生弹性形变；随着第一变径子管的挤压，柔性形变件的内径逐渐变小，且柔性形变件的长度逐渐变长；柔性形变件发生弹性形变并挤压内壁子管并使得内壁子管的腔径变小，腔径的取值范围为0.52mm～0.70mm，腔径的变化范围≤26%。By injecting contrast agent into the first variable diameter sac cavity, the first variable diameter sub-tube expands inward and squeezes the flexible deformable part to cause the flexible deformable part to undergo elastic deformation; as the first variable diameter sub-tube is squeezed, the inner diameter of the flexible deformable part gradually decreases, and the length of the flexible deformable part gradually increases; the flexible deformable part undergoes elastic deformation and squeezes the inner wall sub-tube to reduce the cavity diameter of the inner wall sub-tube, the cavity diameter ranges from 0.52mm to 0.70mm, and the cavity diameter variation range is ≤26%.
进一步的，变径微导管还包括第二变径子管，第二变径子管具有第二变径囊腔，第二变径囊腔用于容纳造影剂或生理盐水；Furthermore, the variable diameter microcatheter further comprises a second variable diameter sub-tube, the second variable diameter sub-tube having a second variable diameter capsule cavity, and the second variable diameter capsule cavity is used to contain a contrast agent or physiological saline;
第二变径子管套设于第一变径子管；或，第二变径子管设置于第一变径子管与所述内壁子管之间。The second reducing sub-tube is sleeved on the first reducing sub-tube; or, the second reducing sub-tube is arranged between the first reducing sub-tube and the inner wall sub-tube.
进一步的，柔性形变件包括：呈管状的金属编织网，套设于内壁子管，且位于变径腔内；或，金属弹簧圈，套设于内壁子管，且位于变径腔内。Furthermore, the flexible deformable member includes: a tubular metal braided mesh, which is sleeved on the inner wall sub-tube and located in the variable diameter cavity; or a metal spring coil, which is sleeved on the inner wall sub-tube and located in the variable diameter cavity.
进一步的，内壁子管采用PTFE材料制成。Furthermore, the inner wall sub-tube is made of PTFE material.
进一步的，变径微导管还包括多个气囊件，多个气囊件设置于外壁子管的外表面，且围绕内壁子管的轴线均匀布设；气囊件包括气囊囊腔，气囊囊腔用于容纳造影剂或生理盐水；通过向气囊囊腔内注入造影剂或生理盐水，气囊件向外膨胀。Furthermore, the variable diameter microcatheter also includes a plurality of airbag components, which are arranged on the outer surface of the outer wall sub-tube and are evenly distributed around the axis of the inner wall sub-tube; the airbag component includes an airbag cavity, which is used to accommodate contrast agent or saline; by injecting contrast agent or saline into the airbag cavity, the airbag component expands outward.
本发明还公开一种输送系统，该输送系统包括如上述任一项实施例所述的变径微导管。The present invention further discloses a delivery system, which comprises the variable diameter microcatheter as described in any one of the above embodiments.
本发明提供的变径微导管及系统，可以实现以下技术效果：The variable diameter microcatheter and system provided by the present invention can achieve the following technical effects:
与现有技术相比，本实施例公开的变径微导管的腔径变化是通过向第一变径囊腔内填充造影剂使得第一变径子管膨胀，并挤压柔性形变件发生弹性形变，柔性形变件的内径逐渐变小，柔性形变件的长度逐渐变长。随着柔性柔性形变件的内径变小，柔性形变件缓慢挤压内壁子管，由于内壁子管的材料及内壁子管的管壁厚度二者之间的配合，使得柔性形变件对内壁子管进行挤压，不会导致内壁子管的内壁产生将产生向管腔内的褶皱，保障了管腔内的通过性，便于推送导丝推送支架在管腔内移动。Compared with the prior art, the change in the lumen diameter of the variable diameter microcatheter disclosed in this embodiment is achieved by filling the first variable diameter capsule cavity with contrast agent to expand the first variable diameter sub-tube, and squeeze the flexible deformable member to undergo elastic deformation, so that the inner diameter of the flexible deformable member gradually decreases, and the length of the flexible deformable member gradually increases. As the inner diameter of the flexible deformable member decreases, the flexible deformable member slowly squeezes the inner wall sub-tube. Due to the coordination between the material of the inner wall sub-tube and the wall thickness of the inner wall sub-tube, the flexible deformable member squeezes the inner wall sub-tube, which will not cause the inner wall of the inner wall sub-tube to produce wrinkles into the lumen, thereby ensuring the permeability of the lumen and facilitating the movement of the guide wire and the stent in the lumen.
同时，还通过柔性形变件的长度与变径腔的长度的配合，实现了变径腔对柔性形变件的长度限位，具体表现为，柔性形变件小于变径腔的长度，柔性形变件的内径逐渐变小，同时柔性形变件的长度逐渐变长直至柔性形变件的长度与变径腔的长度相同，变径腔对柔性形变件的长度进行限位进而限制变径微导管的腔径进一步缩小，从而实现了控制微导管的腔径变化的目的。这样就实现了在一场手术中，无需更换微导管，术者可以对变径微导管的腔径进行灵活调整，通过变径微导管改变腔径的方式，实现了运输多枚不同尺寸、型号的支架。At the same time, the length of the flexible deformable member is coordinated with the length of the variable diameter cavity to achieve the length limitation of the flexible deformable member by the variable diameter cavity. Specifically, the flexible deformable member is smaller than the length of the variable diameter cavity, and the inner diameter of the flexible deformable member gradually decreases. At the same time, the length of the flexible deformable member gradually increases until the length of the flexible deformable member is the same as the length of the variable diameter cavity. The variable diameter cavity limits the length of the flexible deformable member and further reduces the diameter of the variable diameter microcatheter, thereby achieving the purpose of controlling the change in the diameter of the microcatheter. In this way, during an operation, there is no need to replace the microcatheter. The surgeon can flexibly adjust the diameter of the variable diameter microcatheter, and the transportation of multiple stents of different sizes and models can be achieved by changing the diameter of the cavity with the variable diameter microcatheter.
以上的总体描述和下文中的描述仅是示例性和解释性的，不用于限制本发明。The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the present invention.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
一个或一个以上实施例通过与之对应的附图进行示例性说明，这些示例性说明和附图并不构成对实施例的限定，附图中具有相同参考数字标号的元件视为类似的元件，并且其中：One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are regarded as similar elements, and wherein:
图1是本发明一种变径微导管的一种实施例的剖面示意图一；FIG1 is a cross-sectional schematic diagram of an embodiment of a variable diameter microcatheter of the present invention;
图2是本发明一种变径微导管的另一种实施例的剖面示意图一；FIG2 is a cross-sectional schematic diagram of another embodiment of a variable diameter microcatheter of the present invention;
图3是本发明一种变径微导管的另一种实施例的局部剖面示意图；FIG3 is a partial cross-sectional schematic diagram of another embodiment of a variable diameter microcatheter of the present invention;
图4是本发明一种变径微导管的另一种实施例的局部示意图；FIG4 is a partial schematic diagram of another embodiment of a variable diameter microcatheter of the present invention;
图5是本发明一种变径微导管的一种实施例的剖面示意图二；FIG5 is a second cross-sectional schematic diagram of an embodiment of a variable diameter microcatheter of the present invention;
图6是本发明一种变径微导管的一种实施例的剖面示意图三；FIG6 is a third cross-sectional schematic diagram of an embodiment of a variable diameter microcatheter of the present invention;
图7是本发明一种变径微导管的另一种实施例的剖面示意图二。FIG. 7 is a second cross-sectional schematic diagram of another embodiment of a variable diameter microcatheter according to the present invention.
附图标记：Reference numerals:
1、内壁子管；11、管腔；2、第一变径子管；21、第一变径囊腔；30、柔性形变件；31、变径腔；32、分隔件；33、泄压孔；4、外壁子管；5、气囊件；51、气囊囊腔；6、第二变径子管；61、第二变径囊腔。1. Inner wall sub-tube; 11. Tube cavity; 2. First variable diameter sub-tube; 21. First variable diameter cavity; 30. Flexible deformation member; 31. Variable diameter cavity; 32. Partition member; 33. Pressure relief hole; 4. Outer wall sub-tube; 5. Airbag member; 51. Airbag cavity; 6. Second variable diameter sub-tube; 61. Second variable diameter cavity.
具体实施方式DETAILED DESCRIPTION
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。在以下的技术描述中，为方便解释起见，通过多个细节以提供对所披露实施例的充分理解。然而，在没有这些细节的情况下，一个或多个实施例仍然可以实施。在其它情况下，为简化附图，熟知的结构和装置可以简化展示。In order to be able to understand the features and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present invention. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.
本发明实施例的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本发明实施例的实施例。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含。The terms "first", "second", etc. in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present invention described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.
本发明实施例中，术语“上”、“下”、“内”、“中”、“外”、“前”、“后”等指示的方位或位置关系为基于附图所示的方位或位置关系。这些术语主要是为了更好地描述本发明实施例及其实施例，并非用于限定所指示的装置、元件或组成部分必须具有特定方位，或以特定方位进行构造和操作。并且，上述部分术语除了可以用于表示方位或位置关系以外，还可能用于表示其他含义，例如术语“上”在某些情况下也可能用于表示某种依附关系或连接关系。对于本领域普通技术人员而言，可以根据具体情况理解这些术语在本发明实施例中的具体含义。In the embodiments of the present invention, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present invention can be understood according to the specific circumstances.
另外，术语“设置”、“连接”、“固定”应做广义理解。例如，“连接”可以是固定连接，可拆卸连接，或整体式构造；可以是机械连接，或电连接；可以是直接相连，或者是通过中间媒介间接相连，又或者是两个装置、元件或组成部分之间内部的连通。对于本领域普通技术人员而言，可以根据具体情况理解上述术语在本发明实施例中的具体含义。In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
除非另有说明，术语“多个”表示两个或两个以上，“多组”表示两组或两组以上。Unless otherwise specified, the term "plurality" means two or more and "plurality" means two or more.
需要说明的是，在不冲突的情况下，本发明实施例中的实施例及实施例中的特征可以相互组合。It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention may be combined with each other.
在本发明中，远端是指在手术时远离术者的一端，近端是指在手术时靠近术者的一端。In the present invention, the distal end refers to the end away from the operator during surgery, and the proximal end refers to the end close to the operator during surgery.
第一实施例First embodiment
本实施例所提及的变径微导管，如图1所示，该变径微导管包括内壁子管1、第一变径子管2、柔性形变件30。内壁子管1的内部具有管腔11，管腔11可以用于容纳支架及推送导丝。在本发明中，内壁子管1的内径即为管腔11的腔径，同样也可以视为变径微导管的腔径L。在使用时，推送导丝可以推送支架在管腔11内，且沿着管腔11向远端或近端移动。内壁子管1可以采用PTFE材料制成，内壁子管1的管壁厚度的取值范围为0.01mm～0.05mm，这样不仅能够便于推送导丝及支架在管腔11内的移动，同时还能避免内壁子管1被挤压时产生向管腔11内的褶皱。The variable diameter microcatheter mentioned in this embodiment, as shown in Figure 1, includes an inner wall sub-tube 1, a first variable diameter sub-tube 2, and a flexible deformable member 30. The inner wall sub-tube 1 has a lumen 11 inside, and the lumen 11 can be used to accommodate a stent and a push guide wire. In the present invention, the inner diameter of the inner wall sub-tube 1 is the lumen diameter of the lumen 11, and can also be regarded as the lumen diameter L of the variable diameter microcatheter. When in use, the push guide wire can push the stent into the lumen 11 and move along the lumen 11 toward the distal end or the proximal end. The inner wall sub-tube 1 can be made of PTFE material, and the wall thickness of the inner wall sub-tube 1 ranges from 0.01mm to 0.05mm, which not only facilitates the movement of the push guide wire and the stent in the lumen 11, but also avoids wrinkles in the lumen 11 when the inner wall sub-tube 1 is squeezed.
如图1所示，第一变径子管2的管壁内具有第一变径囊腔21，第一变径囊腔21可以用于容纳造影剂或生理盐水。第一变径子管2可以采用Pebax、PU、尼龙中任一种或多种混合而成，这样的第一变径子管2拥有足够的弹性。第一变径子管2套设于内壁子管1，第一变径子管2与内壁子管1紧密贴合设置，且第一变径子管2与内壁子管1之间形成多个变径腔31。多个变径腔31沿内壁子管1的轴线依次间隔设置。相邻的两个变径腔31之间存在分隔件32，分隔件32上具有泄压孔33，泄压孔33便于多个变径腔31之间的造影剂流通。每个变径腔31内均设置有一个柔性形变件30，柔性形变件30的长度小于变径腔31的长度。优选的，柔性形变件30的长度为变径腔31的长度的四分之三。As shown in FIG1 , the first variable diameter sub-tube 2 has a first variable diameter cavity 21 in the tube wall, and the first variable diameter cavity 21 can be used to accommodate contrast agent or saline. The first variable diameter sub-tube 2 can be made of a mixture of any one or more of Pebax, PU, and nylon, and such a first variable diameter sub-tube 2 has sufficient elasticity. The first variable diameter sub-tube 2 is sleeved on the inner wall sub-tube 1, and the first variable diameter sub-tube 2 is tightly fitted with the inner wall sub-tube 1, and a plurality of variable diameter cavities 31 are formed between the first variable diameter sub-tube 2 and the inner wall sub-tube 1. The plurality of variable diameter cavities 31 are arranged in sequence along the axis of the inner wall sub-tube 1. There is a partition 32 between two adjacent variable diameter cavities 31, and the partition 32 has a pressure relief hole 33, which facilitates the flow of contrast agent between the plurality of variable diameter cavities 31. A flexible deformable member 30 is arranged in each variable diameter cavity 31, and the length of the flexible deformable member 30 is less than the length of the variable diameter cavity 31. Preferably, the length of the flexible deformable member 30 is three quarters of the length of the variable diameter cavity 31.
第一实施例的一示例性实施例的使用场景：A usage scenario of an exemplary embodiment of the first embodiment:
如图1所示，若需要先植入一枚大尺寸的支架，后植入一枚一枚小尺寸的支架。本实施例所公开的变径微导管处于原始状态，即此时变径微导管的腔径L最大为0.70mm。当变径微导管处于原始状态时，适用于大尺寸的支架，并配合大尺寸的支架的植入，但需要向多个变径腔31内填充造影剂，并使得柔性形变件30浸泡于造影剂中。通过靠近近端的一个变径腔31的注液孔向变径腔31内注入造影剂，造影剂通过泄压孔33充满多个变径腔31。变径腔31不会随着造影剂的填充而膨胀。造影剂能够在柔性形变件30发生弹性形变时起到润滑作用，减少了柔性形变件30与变径腔31的腔壁之间的摩擦。若变径腔31发生破损，造影剂进入人体，也便于人体代谢排出。变径腔31对柔性形变件30起限位作用。As shown in Figure 1, if it is necessary to implant a large-sized stent first, and then implant small-sized stents one by one. The variable diameter microcatheter disclosed in this embodiment is in the original state, that is, the maximum lumen diameter L of the variable diameter microcatheter is 0.70mm at this time. When the variable diameter microcatheter is in the original state, it is suitable for large-sized stents and cooperates with the implantation of large-sized stents, but it is necessary to fill contrast agents into multiple variable diameter cavities 31 and make the flexible deformable member 30 immersed in the contrast agent. The contrast agent is injected into the variable diameter cavity 31 through the injection hole of a variable diameter cavity 31 near the proximal end, and the contrast agent fills multiple variable diameter cavities 31 through the pressure relief hole 33. The variable diameter cavity 31 will not expand with the filling of the contrast agent. The contrast agent can play a lubricating role when the flexible deformable member 30 undergoes elastic deformation, reducing the friction between the flexible deformable member 30 and the cavity wall of the variable diameter cavity 31. If the variable diameter cavity 31 is damaged, the contrast agent enters the human body, which is also convenient for human body metabolism and excretion. The diameter-changing cavity 31 serves to limit the flexible deformable member 30 .
当需要植入小尺寸的支架时，需要小腔径的微导管，无需更换微导管，仅需向第一变径子管2的第一变径囊腔21内注入造影剂，第一变径子管2随着造影剂的注入而膨胀。图1中的箭头所指方向为第一变径子管2的膨胀方向，第一变径子管2的膨胀方向有两个，其中，第一变径子管2的外壁向外膨胀，即第一变径子管2的外壁朝远离内壁子管1的管腔11的方向膨胀。第一变径子管2的内壁向内膨胀，即第一变径子管2的内壁朝内壁子管1的管腔11的方向膨胀。随着第一变径子管2的膨胀，第一变径子管2的内壁缓慢挤压柔性形变件30，柔性形变件30发生弹性形变，具体表现为，柔性形变件30的内径逐渐变小，而柔性形变件30的长度逐渐变长。与此同时，第一变径子管2的内壁也将多个变径腔31内的造影剂从远端向近端的方向慢慢挤出，并通过靠近近端的一个变径腔31的注液孔排出变径腔31外。随着柔性形变件30的内径逐渐变小，柔性形变件30缓慢挤压内壁子管1并使得内壁子管1的腔径变小，变径微导管的腔径L最小为0.43mm。变径微导管的腔径数值的变化范围为0.43mm～0.70mm，而腔径L的变化范围＜40%。When a small-sized stent needs to be implanted, a microcatheter with a small lumen is required. There is no need to replace the microcatheter. It is only necessary to inject contrast agent into the first reducing sac cavity 21 of the first reducing sub-tube 2, and the first reducing sub-tube 2 expands as the contrast agent is injected. The direction indicated by the arrow in Figure 1 is the expansion direction of the first reducing sub-tube 2. The first reducing sub-tube 2 has two expansion directions, wherein the outer wall of the first reducing sub-tube 2 expands outward, that is, the outer wall of the first reducing sub-tube 2 expands in the direction away from the lumen 11 of the inner wall sub-tube 1. The inner wall of the first reducing sub-tube 2 expands inward, that is, the inner wall of the first reducing sub-tube 2 expands in the direction of the lumen 11 of the inner wall sub-tube 1. As the first reducing sub-tube 2 expands, the inner wall of the first reducing sub-tube 2 slowly squeezes the flexible deformable member 30, and the flexible deformable member 30 undergoes elastic deformation, which is specifically manifested in that the inner diameter of the flexible deformable member 30 gradually decreases, and the length of the flexible deformable member 30 gradually increases. At the same time, the inner wall of the first variable diameter sub-tube 2 also slowly squeezes the contrast agent in the multiple variable diameter cavities 31 from the distal end to the proximal end, and discharges it out of the variable diameter cavity 31 through the injection hole of a variable diameter cavity 31 near the proximal end. As the inner diameter of the flexible deformable member 30 gradually decreases, the flexible deformable member 30 slowly squeezes the inner wall sub-tube 1 and makes the cavity diameter of the inner wall sub-tube 1 smaller, and the minimum cavity diameter L of the variable diameter microcatheter is 0.43mm. The range of the cavity diameter value of the variable diameter microcatheter is 0.43mm to 0.70mm, and the range of the cavity diameter L is less than 40%.
在本实施例中，采用造影剂对变径腔31及第一变径囊腔21进行填充，则便于术者观察变径微导管在血管内的情况，当后期变径腔31、第一变径囊腔21发生胀裂的情况，造影剂进入血管内，也便于人体代谢，避免了对人体造成损伤。In this embodiment, contrast agent is used to fill the variable diameter cavity 31 and the first variable diameter capsule cavity 21, which makes it easier for the operator to observe the condition of the variable diameter microcatheter in the blood vessel. When the variable diameter cavity 31 and the first variable diameter capsule cavity 21 rupture, the contrast agent enters the blood vessel, which is also easier for the human body to metabolize and avoids damage to the human body.
与现有技术相比，本实施例公开的变径微导管的腔径变化是通过向第一变径囊腔21内填充造影剂使得第一变径子管2膨胀，并挤压柔性形变件30发生弹性形变，柔性形变件30的内径逐渐变小，柔性形变件30的长度逐渐变长。随着柔性柔性形变件30的内径变小，柔性形变件30缓慢挤压内壁子管1，由于内壁子管1的材料及内壁子管1的管壁厚度二者之间的配合，使得柔性形变件30对内壁子管1进行挤压，不会导致内壁子管1的内壁产生将产生向管腔11内的褶皱，保障了管腔11内的通过性，便于推送导丝推送支架在管腔11内移动。Compared with the prior art, the change in the lumen diameter of the variable diameter microcatheter disclosed in this embodiment is achieved by filling the first variable diameter sac cavity 21 with contrast agent to expand the first variable diameter sub-tube 2, and squeeze the flexible deformable member 30 to undergo elastic deformation, so that the inner diameter of the flexible deformable member 30 gradually decreases, and the length of the flexible deformable member 30 gradually increases. As the inner diameter of the flexible deformable member 30 decreases, the flexible deformable member 30 slowly squeezes the inner wall sub-tube 1. Due to the coordination between the material of the inner wall sub-tube 1 and the thickness of the tube wall of the inner wall sub-tube 1, the flexible deformable member 30 squeezes the inner wall sub-tube 1, which will not cause the inner wall of the inner wall sub-tube 1 to produce wrinkles that will be generated in the lumen 11, thereby ensuring the permeability in the lumen 11 and facilitating the movement of the guide wire and the stent in the lumen 11.
同时，还通过柔性形变件30的长度与变径腔31的长度的配合，实现了变径腔31对柔性形变件30的长度限位，具体表现为，柔性形变件30小于变径腔31的长度，柔性形变件30的内径逐渐变小，同时柔性形变件30的长度逐渐变长直至柔性形变件30的长度与变径腔31的长度相同，变径腔31对柔性形变件30的长度进行限位进而限制变径微导管的腔径进一步缩小，从而实现了控制微导管的腔径变化的目的。这样就实现了在一场手术中，无需更换微导管，术者可以对变径微导管的腔径进行灵活调整，通过变径微导管改变腔径的方式，实现了运输多枚不同尺寸、型号的支架。还可以防止支架在变径微导管的管腔11内脱载，还避免了支架无法在管腔11内运输的风险，保障了推送导丝、支架与管腔11腔壁的贴合度。At the same time, the length of the flexible deformable member 30 is matched with the length of the variable diameter cavity 31, so that the variable diameter cavity 31 limits the length of the flexible deformable member 30. Specifically, the flexible deformable member 30 is smaller than the length of the variable diameter cavity 31, and the inner diameter of the flexible deformable member 30 gradually decreases. At the same time, the length of the flexible deformable member 30 gradually increases until the length of the flexible deformable member 30 is the same as the length of the variable diameter cavity 31. The variable diameter cavity 31 limits the length of the flexible deformable member 30 and further limits the diameter of the variable diameter microcatheter to be further reduced, thereby achieving the purpose of controlling the change in the diameter of the microcatheter. In this way, in an operation, there is no need to replace the microcatheter. The surgeon can flexibly adjust the diameter of the variable diameter microcatheter. By changing the diameter of the variable diameter microcatheter, multiple stents of different sizes and models can be transported. It can also prevent the stent from being unloaded in the lumen 11 of the variable diameter microcatheter, and avoid the risk of the stent being unable to be transported in the lumen 11, thereby ensuring the fit between the push guide wire, the stent and the lumen wall of the lumen 11.
本实施例公开的变径微导管还可以通过控制注入第一变径子囊腔内的造影剂的量以实现改变变径微导管的硬度，从而实现变径微导管适用于不同弯曲的血管的场景。The variable diameter microcatheter disclosed in this embodiment can also change the hardness of the variable diameter microcatheter by controlling the amount of contrast agent injected into the first variable diameter sub-capsule cavity, thereby realizing the scenario where the variable diameter microcatheter is suitable for blood vessels with different bends.
在本实施例中，柔性形变件30的具体结构有两种可选的技术方案，具体如下：In this embodiment, there are two optional technical solutions for the specific structure of the flexible deformable member 30, which are as follows:
可选的，（图中未示出），柔性形变件30包括金属编织网，金属编织网采用镍钛合金丝编织成管状结构，呈管状的金属编织网套设于内壁子管1，且同时位于变径腔31内。Optionally (not shown in the figure), the flexible deformable member 30 includes a metal braided mesh, which is braided into a tubular structure using nickel-titanium alloy wires. The tubular metal braided mesh is sleeved on the inner wall sub-tube 1 and is also located in the variable diameter cavity 31 .
可选的，如图1所示，柔性形变件30包括金属弹簧圈，金属弹簧圈采用镍钛合金丝制成管状结构，金属弹簧圈套设于内壁子管1，且同时位于变径腔31内。Optionally, as shown in FIG. 1 , the flexible deformable member 30 includes a metal spring coil, which is made of a tubular structure using nickel-titanium alloy wire. The metal spring coil is sleeved on the inner wall sub-tube 1 and is located in the variable diameter cavity 31 at the same time.
上述两种可选的技术方案任选其一即可。You can choose any one of the two optional technical solutions mentioned above.
第二实施例Second embodiment
第二实施例是第一实施例的并列技术方案，本实施例还提及另一变径微导管，如图2所示，该变径微导管包括内壁子管1、第一变径子管2、柔性形变件30、外壁子管4。内壁子管1的内部具有管腔11，管腔11可以用于容纳支架及推送导丝。在本发明中，内壁子管1的内径即为管腔11的腔径，同样也可以视为变径微导管的腔径L。在使用时，推送导丝可以推送支架在管腔11内，且沿着管腔11向远端或近端移动。内壁子管1可以采用PTFE材料制成，内壁子管1的管壁厚度的取值范围为0.01mm～0.05mm，这样不仅能够便于推送导丝及支架在管腔11内的移动，同时还能避免内壁子管1被挤压时产生向管腔11内的褶皱。The second embodiment is a parallel technical solution of the first embodiment. This embodiment also mentions another variable diameter microcatheter, as shown in Figure 2, the variable diameter microcatheter includes an inner wall sub-tube 1, a first variable diameter sub-tube 2, a flexible deformable member 30, and an outer wall sub-tube 4. The inner wall sub-tube 1 has a lumen 11 inside, and the lumen 11 can be used to accommodate the stent and the push guide wire. In the present invention, the inner diameter of the inner wall sub-tube 1 is the lumen diameter of the lumen 11, and can also be regarded as the lumen diameter L of the variable diameter microcatheter. When in use, the push guide wire can push the stent in the lumen 11 and move along the lumen 11 to the distal end or the proximal end. The inner wall sub-tube 1 can be made of PTFE material, and the wall thickness of the inner wall sub-tube 1 ranges from 0.01mm to 0.05mm, which can not only facilitate the movement of the push guide wire and the stent in the lumen 11, but also avoid the wrinkles in the lumen 11 when the inner wall sub-tube 1 is squeezed.
如图2所示，第一变径子管2的管壁内具有第一变径囊腔21，第一变径囊腔21可以用于容纳造影剂或生理盐水。第一变径子管2可以采用Pebax、PU、尼龙中任一种或多种混合而成，这样的第一变径子管2拥有足够的弹性。第一变径子管2套设于内壁子管1，第一变径子管2与内壁子管1紧密贴合设置，且第一变径子管2与内壁子管1之间形成多个变径腔31。多个变径腔31沿内壁子管1的轴线依次间隔设置。相邻的两个变径腔31之间存在分隔件32，分隔件32上具有泄压孔33，泄压孔33便于多个变径腔31之间的造影剂流通。每个变径腔31内均设置有一个柔性形变件30，柔性形变件30的长度小于变径腔31的长度。优选的，柔性形变件30的长度为变径腔31的长度的四分之三。外壁子管4套设于第一变径子管2，并对第一变径子管2的向外膨胀进行限制。As shown in FIG2 , the first variable diameter sub-tube 2 has a first variable diameter cavity 21 in the tube wall, and the first variable diameter cavity 21 can be used to accommodate contrast agent or saline. The first variable diameter sub-tube 2 can be made of a mixture of any one or more of Pebax, PU, and nylon, and such a first variable diameter sub-tube 2 has sufficient elasticity. The first variable diameter sub-tube 2 is sleeved on the inner wall sub-tube 1, and the first variable diameter sub-tube 2 is tightly fitted with the inner wall sub-tube 1, and a plurality of variable diameter cavities 31 are formed between the first variable diameter sub-tube 2 and the inner wall sub-tube 1. The plurality of variable diameter cavities 31 are arranged in sequence along the axis of the inner wall sub-tube 1. There is a partition 32 between two adjacent variable diameter cavities 31, and the partition 32 has a pressure relief hole 33, which facilitates the flow of contrast agent between the plurality of variable diameter cavities 31. A flexible deformable member 30 is arranged in each variable diameter cavity 31, and the length of the flexible deformable member 30 is less than the length of the variable diameter cavity 31. Preferably, the length of the flexible deformable member 30 is three quarters of the length of the variable diameter cavity 31. The outer wall sub-tube 4 is sleeved on the first reducing sub-tube 2 and limits the outward expansion of the first reducing sub-tube 2 .
第二实施例的一示例性实施例的使用场景：A usage scenario of an exemplary embodiment of the second embodiment:
如图2所示，若需要先植入一枚大尺寸的支架，后植入一枚一枚小尺寸的支架。本实施例所公开的变径微导管处于原始状态，即此时变径微导管的腔径L最大为0.69±0.01mm。当变径微导管处于原始状态时，适用于大尺寸的支架，并配合大尺寸的支架的植入，但需要向多个变径腔31内填充造影剂，并使得柔性形变件30浸泡于造影剂中。通过靠近近端的一个变径腔31的注液孔向变径腔31内注入造影剂，造影剂通过泄压孔33充满多个变径腔31。变径腔31不会随着造影剂的填充而膨胀。造影剂能够在柔性形变件30发生弹性形变时起到润滑作用，减少了柔性形变件30与变径腔31的腔壁之间的摩擦。若变径腔31发生破损，造影剂进入人体，也便于人体代谢排出。变径腔31对柔性形变件30起限位作用。As shown in FIG. 2 , if a large-sized stent needs to be implanted first, then small-sized stents are implanted one by one. The variable-diameter microcatheter disclosed in this embodiment is in the original state, that is, the maximum lumen diameter L of the variable-diameter microcatheter is 0.69±0.01 mm at this time. When the variable-diameter microcatheter is in the original state, it is suitable for large-sized stents and cooperates with the implantation of large-sized stents, but it is necessary to fill contrast agents into multiple variable-diameter cavities 31 and immerse the flexible deformable member 30 in the contrast agent. The contrast agent is injected into the variable-diameter cavity 31 through the injection hole of a variable-diameter cavity 31 near the proximal end, and the contrast agent fills multiple variable-diameter cavities 31 through the pressure relief hole 33. The variable-diameter cavity 31 will not expand with the filling of the contrast agent. The contrast agent can play a lubricating role when the flexible deformable member 30 undergoes elastic deformation, reducing the friction between the flexible deformable member 30 and the cavity wall of the variable-diameter cavity 31. If the variable-diameter cavity 31 is damaged, the contrast agent enters the human body, which is also convenient for human body metabolism and excretion. The diameter-changing cavity 31 serves to limit the flexible deformable member 30 .
当需要植入小尺寸的支架时，需要小腔径的微导管，无需更换微导管，仅需向第一变径子管2的第一变径囊腔21内注入造影剂，第一变径子管2随着造影剂的注入而膨胀，由于外壁子管4对第一变径子管2的限制，图2中的箭头所指方向为第一变径子管2的膨胀方向，第一变径子管2的内壁只能向内膨胀，即第一变径子管2的内壁只能朝内壁子管1的管腔11的方向膨胀。随着第一变径子管2的膨胀，第一变径子管2的内壁缓慢挤压柔性形变件30，柔性形变件30发生弹性形变，具体表现为，柔性形变件30的内径逐渐变小，而柔性形变件30的长度逐渐变长。与此同时，第一变径子管2的内壁也将多个变径腔31内的造影剂从远端向近端的方向慢慢挤出，并通过靠近近端的一个变径腔31的注液孔排出变径腔31外。随着柔性形变件30的内径逐渐变小，柔性形变件30缓慢挤压内壁子管1并使得内壁子管1的腔径变小，变径微导管的腔径L最小为0.53±0.01mm。变径微导管的腔径数值的变化范围为0.52mm～0.70mm，而腔径L的变化范围＜26%。When a small-sized stent needs to be implanted, a microcatheter with a small lumen is required. There is no need to replace the microcatheter. It is only necessary to inject contrast agent into the first reducing sac cavity 21 of the first reducing sub-tube 2. The first reducing sub-tube 2 expands with the injection of contrast agent. Due to the restriction of the outer wall sub-tube 4 on the first reducing sub-tube 2, the direction indicated by the arrow in Figure 2 is the expansion direction of the first reducing sub-tube 2. The inner wall of the first reducing sub-tube 2 can only expand inward, that is, the inner wall of the first reducing sub-tube 2 can only expand in the direction of the lumen 11 of the inner wall sub-tube 1. As the first reducing sub-tube 2 expands, the inner wall of the first reducing sub-tube 2 slowly squeezes the flexible deformable member 30, and the flexible deformable member 30 undergoes elastic deformation, which is specifically manifested in that the inner diameter of the flexible deformable member 30 gradually decreases, while the length of the flexible deformable member 30 gradually increases. At the same time, the inner wall of the first variable diameter sub-tube 2 also slowly squeezes the contrast agent in the multiple variable diameter cavities 31 from the distal end to the proximal end, and discharges it out of the variable diameter cavity 31 through the injection hole of a variable diameter cavity 31 near the proximal end. As the inner diameter of the flexible deformable member 30 gradually decreases, the flexible deformable member 30 slowly squeezes the inner wall sub-tube 1 and makes the cavity diameter of the inner wall sub-tube 1 smaller, and the minimum cavity diameter L of the variable diameter microcatheter is 0.53±0.01mm. The range of the cavity diameter value of the variable diameter microcatheter is 0.52mm～0.70mm, and the range of the cavity diameter L is <26%.
在本实施例中，采用造影剂对变径腔31及第一变径囊腔21进行填充，则便于术者观察变径微导管在血管内的情况，当后期变径腔31、第一变径囊腔21发生胀裂的情况，造影剂进入血管内，也便于人体代谢，避免了对人体造成损伤。In this embodiment, contrast agent is used to fill the variable diameter cavity 31 and the first variable diameter capsule cavity 21, which makes it easier for the operator to observe the condition of the variable diameter microcatheter in the blood vessel. When the variable diameter cavity 31 and the first variable diameter capsule cavity 21 rupture, the contrast agent enters the blood vessel, which is also easier for the human body to metabolize and avoids damage to the human body.
与现有技术相比，本实施例公开的变径微导管的腔径变化是通过向第一变径囊腔21内填充造影剂使得第一变径子管2向内单向膨胀，并挤压柔性形变件30发生弹性形变，柔性形变件30的内径逐渐变小，柔性形变件30的长度逐渐变长。随着柔性柔性形变件30的内径变小，柔性形变件30缓慢挤压内壁子管1，由于内壁子管1的材料及内壁子管1的管壁厚度二者之间的配合，使得柔性形变件30对内壁子管1进行挤压，不会导致内壁子管1的内壁产生将产生向管腔11内的褶皱，保障了管腔11内的通过性，便于推送导丝推送支架在管腔11内移动。Compared with the prior art, the change in the lumen diameter of the variable diameter microcatheter disclosed in this embodiment is achieved by filling the first variable diameter sac cavity 21 with contrast agent so that the first variable diameter sub-tube 2 expands inwardly in one direction, and squeezes the flexible deformable member 30 to undergo elastic deformation, the inner diameter of the flexible deformable member 30 gradually decreases, and the length of the flexible deformable member 30 gradually increases. As the inner diameter of the flexible deformable member 30 decreases, the flexible deformable member 30 slowly squeezes the inner wall sub-tube 1. Due to the coordination between the material of the inner wall sub-tube 1 and the thickness of the tube wall of the inner wall sub-tube 1, the flexible deformable member 30 squeezes the inner wall sub-tube 1, which will not cause the inner wall of the inner wall sub-tube 1 to produce wrinkles that will be generated in the lumen 11, thereby ensuring the permeability in the lumen 11 and facilitating the movement of the guide wire and the stent in the lumen 11.
同时，还通过柔性形变件30的长度与变径腔31的长度的配合，实现了变径腔31对柔性形变件30的长度限位，具体表现为，柔性形变件30小于变径腔31的长度，柔性形变件30的内径逐渐变小，同时柔性形变件30的长度逐渐变长直至柔性形变件30的长度与变径腔31的长度相同，变径腔31对柔性形变件30的长度进行限位进而限制变径微导管的腔径进一步缩小，从而实现了控制微导管的腔径变化的目的。这样就实现了在一场手术中，无需更换微导管，术者可以对变径微导管的腔径进行灵活调整，通过变径微导管改变腔径的方式，实现了运输多枚不同尺寸、型号的支架。还可以防止支架在变径微导管的管腔11内脱载，还避免了支架无法在管腔11内运输的风险，保障了推送导丝、支架与管腔11腔壁的贴合度。At the same time, the length of the flexible deformable member 30 is matched with the length of the variable diameter cavity 31, so that the variable diameter cavity 31 limits the length of the flexible deformable member 30. Specifically, the flexible deformable member 30 is smaller than the length of the variable diameter cavity 31, and the inner diameter of the flexible deformable member 30 gradually decreases. At the same time, the length of the flexible deformable member 30 gradually increases until the length of the flexible deformable member 30 is the same as the length of the variable diameter cavity 31. The variable diameter cavity 31 limits the length of the flexible deformable member 30 and further limits the diameter of the variable diameter microcatheter to be further reduced, thereby achieving the purpose of controlling the change in the diameter of the microcatheter. In this way, in an operation, there is no need to replace the microcatheter. The surgeon can flexibly adjust the diameter of the variable diameter microcatheter. By changing the diameter of the variable diameter microcatheter, multiple stents of different sizes and models can be transported. It can also prevent the stent from being unloaded in the lumen 11 of the variable diameter microcatheter, and avoid the risk of the stent being unable to be transported in the lumen 11, thereby ensuring the fit between the push guide wire, the stent and the lumen wall of the lumen 11.
本实施例公开的变径微导管还可以通过控制注入第一变径子囊腔内的造影剂的量以实现改变变径微导管的硬度，从而实现变径微导管适用于不同弯曲的血管的场景。The variable diameter microcatheter disclosed in this embodiment can also change the hardness of the variable diameter microcatheter by controlling the amount of contrast agent injected into the first variable diameter sub-capsule cavity, thereby realizing the scenario where the variable diameter microcatheter is suitable for blood vessels with different bends.
在本实施例中，柔性形变件30的具体结构有两种可选的技术方案，具体如下：In this embodiment, there are two optional technical solutions for the specific structure of the flexible deformable member 30, which are as follows:
可选的，（图中未示出），柔性形变件30包括金属编织网，金属编织网采用镍钛合金丝编织成管状结构，呈管状的金属编织网套设于内壁子管1，且同时位于变径腔31内。Optionally (not shown in the figure), the flexible deformable member 30 includes a metal braided mesh, which is braided into a tubular structure using nickel-titanium alloy wires. The tubular metal braided mesh is sleeved on the inner wall sub-tube 1 and is also located in the variable diameter cavity 31 .
可选的，如图2所示，柔性形变件30包括金属弹簧圈，金属弹簧圈采用镍钛合金丝制成管状结构，金属弹簧圈套设于内壁子管1，且同时位于变径腔31内。Optionally, as shown in FIG. 2 , the flexible deformable member 30 includes a metal spring coil, which is made of a tubular structure using nickel-titanium alloy wire. The metal spring coil is sleeved on the inner wall sub-tube 1 and is located in the variable diameter cavity 31 at the same time.
上述两种可选的技术方案任选其一即可。You can choose any one of the two optional technical solutions mentioned above.
第三实施例Third embodiment
本实施例同样提出了一种变径微导管，第三实施例是基于第二实施例的进一步改进，具体如下：This embodiment also proposes a variable diameter microcatheter. The third embodiment is a further improvement based on the second embodiment, and is specifically as follows:
如图3、图4所示，变径微导管还包括多个气囊件5，多个气囊件5设置于外壁子管4的外表面，多个气囊件5围绕内壁子管1的轴线均匀布设，也可以视为多个气囊件5围绕变径微导管的轴线均匀布设。气囊件5内具有气囊囊腔51，气囊囊腔51用于容纳造影剂或生理盐水。当然，多个气囊件5的气囊囊腔51也可以设置成相互连通的，便于向气囊囊腔51内注入造影剂或生理盐水。从气囊囊腔51靠近近端的一端向气囊囊腔51内注入造影剂或生理盐水，可以使得气囊件5向外膨胀，即气囊件5朝向远离外壁子管4的方向膨胀，图3中的箭头所指方向为气囊件5的膨胀方向。As shown in Fig. 3 and Fig. 4, the variable diameter microcatheter also includes a plurality of airbags 5, which are arranged on the outer surface of the outer wall sub-tube 4. The plurality of airbags 5 are evenly arranged around the axis of the inner wall sub-tube 1, which can also be regarded as the plurality of airbags 5 being evenly arranged around the axis of the variable diameter microcatheter. The airbag 5 has an airbag cavity 51 therein, and the airbag cavity 51 is used to accommodate contrast agent or saline. Of course, the airbag cavities 51 of the plurality of airbags 5 can also be arranged to be interconnected, so as to facilitate the injection of contrast agent or saline into the airbag cavity 51. By injecting contrast agent or saline into the airbag cavity 51 from one end of the airbag cavity 51 close to the proximal end, the airbag 5 can be expanded outward, that is, the airbag 5 expands in the direction away from the outer wall sub-tube 4, and the direction indicated by the arrow in Fig. 3 is the expansion direction of the airbag 5.
相比于现有技术而言，在本实施例中，在变径微导管上设置多个气囊件5，并通过向气囊件5的气囊囊腔51内注入造影剂或生理盐水，可以使得气囊件5进行膨胀，在使用时，将本实施例公开的变径微导管设置于中间导管内，可以保障变径微导管和中间导管的同轴度，还能进一步提高变径微导管在中间导管内的稳定性。还可以防止变径微导管在中间导管内发生旋转。同时，当需要进行造影时，造影剂能够通过多个气囊件5之间的缝隙进行流通。Compared with the prior art, in this embodiment, a plurality of airbags 5 are arranged on the variable diameter microcatheter, and contrast agent or saline is injected into the airbag cavity 51 of the airbag 5 to expand the airbag 5. When in use, the variable diameter microcatheter disclosed in this embodiment is arranged in the intermediate catheter, which can ensure the coaxiality of the variable diameter microcatheter and the intermediate catheter, and further improve the stability of the variable diameter microcatheter in the intermediate catheter. The variable diameter microcatheter can also be prevented from rotating in the intermediate catheter. At the same time, when contrast imaging is required, the contrast agent can flow through the gaps between the plurality of airbags 5.
第四实施例Fourth embodiment
本实施例同样提出了一种变径微导管，第四实施例是基于第一至第三实施例中任一项实施例的进一步改进，改进之处在于第二变径子管6的设置方式。具体如下：This embodiment also proposes a variable diameter micro-catheter. The fourth embodiment is a further improvement based on any one of the first to third embodiments, and the improvement lies in the arrangement of the second variable diameter sub-tube 6. The details are as follows:
可选地，如图5所示，变径微导管还包括第二变径子管6，第二变径子管6的管壁内具有第二变径囊腔61，第二变径囊腔61可以用于容纳造影剂或生理盐水。第二变径子管6可以采用Pebax、PU、尼龙中任一种或多种混合而成，这样的第二变径子管6拥有足够的弹性。第二变径子管6设置于第一变径子管2与内壁子管1之间，第二变径子管6套设于内壁子管1，第一变径子管2套设于第二变径子管6，第二变径子管6与内壁子管1紧密贴合设置，且第二变径子管6与内壁子管1之间形成多个变径腔31。多个变径腔31沿内壁子管1的轴线依次间隔设置。相邻的两个变径腔31之间存在分隔件32，分隔件32上具有泄压孔33，泄压孔33便于多个变径腔31之间的造影剂流通。每个变径腔31内均设置有一个柔性形变件30，柔性形变件30的长度小于变径腔31的长度。将第一变径子管2套设于第二变径子管6，并分别向第一变径子管2的第一变径囊腔21、第二变径子管6的第二变径囊腔61内注入造影剂的方式，通过二者处于膨胀状态下之间的配合，进而实现了更加精准地对变径微导管的管腔11的腔径大小的调整。该可选的技术方案能够与第一至第三实施例中任一项实施例所公开的技术方案进行结合。Optionally, as shown in FIG5 , the variable diameter microcatheter further includes a second variable diameter sub-tube 6, and the wall of the second variable diameter sub-tube 6 has a second variable diameter capsule 61, and the second variable diameter capsule 61 can be used to accommodate contrast agent or saline. The second variable diameter sub-tube 6 can be made of any one or more of Pebax, PU, and nylon, and such a second variable diameter sub-tube 6 has sufficient elasticity. The second variable diameter sub-tube 6 is arranged between the first variable diameter sub-tube 2 and the inner wall sub-tube 1, the second variable diameter sub-tube 6 is sleeved on the inner wall sub-tube 1, the first variable diameter sub-tube 2 is sleeved on the second variable diameter sub-tube 6, the second variable diameter sub-tube 6 and the inner wall sub-tube 1 are tightly fitted, and a plurality of variable diameter cavities 31 are formed between the second variable diameter sub-tube 6 and the inner wall sub-tube 1. The plurality of variable diameter cavities 31 are arranged in sequence along the axis of the inner wall sub-tube 1. There is a partition 32 between two adjacent variable diameter cavities 31, and the partition 32 has a pressure relief hole 33, and the pressure relief hole 33 facilitates the flow of contrast agent between the plurality of variable diameter cavities 31. A flexible deformable member 30 is disposed in each variable diameter cavity 31, and the length of the flexible deformable member 30 is less than the length of the variable diameter cavity 31. The first variable diameter sub-tube 2 is sleeved on the second variable diameter sub-tube 6, and contrast agent is injected into the first variable diameter capsule cavity 21 of the first variable diameter sub-tube 2 and the second variable diameter capsule cavity 61 of the second variable diameter sub-tube 6 respectively, and the two are in the expanded state. The cooperation between them can achieve a more accurate adjustment of the lumen size of the tube cavity 11 of the variable diameter microcatheter. This optional technical solution can be combined with the technical solution disclosed in any one of the first to third embodiments.
可选地，如图6所示，变径微导管还包括第二变径子管6，第二变径子管6的管壁内具有第二变径囊腔61，第二变径囊腔61可以用于容纳造影剂或生理盐水。第二变径子管6可以采用Pebax、PU、尼龙中任一种或多种混合而成，这样的第二变径子管6拥有足够的弹性。第二变径子管6套设于第一变径子管2，分别向第一变径子管2的第一变径囊腔21、第二变径子管6的第二变径囊腔61内注入造影剂的方式，通过二者处于膨胀状态下之间的配合，进而实现了更加精准地对变径微导管的管腔11的腔径大小的调整。该可选的技术方案能够与第一实施例所公开的技术方案进行结合。Optionally, as shown in FIG6 , the variable diameter microcatheter further includes a second variable diameter sub-tube 6, and the wall of the second variable diameter sub-tube 6 has a second variable diameter capsule 61, and the second variable diameter capsule 61 can be used to accommodate contrast agent or saline. The second variable diameter sub-tube 6 can be made of a mixture of any one or more of Pebax, PU, and nylon, and such a second variable diameter sub-tube 6 has sufficient elasticity. The second variable diameter sub-tube 6 is sleeved on the first variable diameter sub-tube 2, and the contrast agent is injected into the first variable diameter capsule 21 of the first variable diameter sub-tube 2 and the second variable diameter capsule 61 of the second variable diameter sub-tube 6 respectively. Through the cooperation between the two in the expanded state, a more accurate adjustment of the lumen size of the lumen 11 of the variable diameter microcatheter is achieved. This optional technical solution can be combined with the technical solution disclosed in the first embodiment.
可选地，如图7所示，变径微导管还包括第二变径子管6，第二变径子管6的管壁内具有第二变径囊腔61，第二变径囊腔61可以用于容纳造影剂或生理盐水。第二变径子管6可以采用Pebax、PU、尼龙中任一种或多种混合而成，这样的第二变径子管6拥有足够的弹性。第二变径子管6套设于第一变径子管2，且第二变径子管6位于第一变径子管2与外壁子管4之间，分别向第一变径子管2的第一变径囊腔21、第二变径子管6的第二变径囊腔61内注入造影剂的方式，通过二者处于膨胀状态下之间的配合，进而实现了更加精准地对变径微导管的管腔11的腔径大小的调整。该可选的技术方案能够与第二或第三实施例所公开的技术方案进行结合。Optionally, as shown in FIG7 , the variable diameter microcatheter further includes a second variable diameter sub-tube 6, and a second variable diameter capsule cavity 61 is provided in the tube wall of the second variable diameter sub-tube 6, and the second variable diameter capsule cavity 61 can be used to accommodate contrast agent or saline. The second variable diameter sub-tube 6 can be made of a mixture of any one or more of Pebax, PU, and nylon, and such a second variable diameter sub-tube 6 has sufficient elasticity. The second variable diameter sub-tube 6 is sleeved on the first variable diameter sub-tube 2, and the second variable diameter sub-tube 6 is located between the first variable diameter sub-tube 2 and the outer wall sub-tube 4, and the contrast agent is injected into the first variable diameter capsule cavity 21 of the first variable diameter sub-tube 2 and the second variable diameter capsule cavity 61 of the second variable diameter sub-tube 6 respectively, and the two cooperate in the expanded state, thereby achieving a more accurate adjustment of the diameter size of the tube cavity 11 of the variable diameter microcatheter. This optional technical solution can be combined with the technical solution disclosed in the second or third embodiment.
第五实施例Fifth embodiment
本实施例还提出了一种输送系统（图中未示出），该输送系统包括第一实施例至第四实施例中任一项所述的变径微导管。This embodiment further provides a delivery system (not shown in the figure), which includes a variable diameter microcatheter as described in any one of the first to fourth embodiments.
以上描述和附图充分地示出了本发明的实施例，以使本领域的技术人员能够实践它们。其他实施例可以包括结构的以及其他的改变。实施例仅代表可能的变化。除非明确要求，否则单独的部件和功能是可选的，并且操作的顺序可以变化。一些实施例的部分和特征可以被包括在或替换其他实施例的部分和特征。本发明的实施例并不局限于上面已经描述并在附图中示出的结构，并且可以在不脱离其范围进行各种修改和改变。本发明的范围仅由所附的权利要求来限制。The above description and the accompanying drawings fully illustrate the embodiments of the present invention so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The embodiments of the present invention are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411203425.2ACN118697527B (en) | 2024-08-30 | 2024-08-30 | A variable diameter microcatheter and system |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411203425.2ACN118697527B (en) | 2024-08-30 | 2024-08-30 | A variable diameter microcatheter and system |
| Publication Number | Publication Date |
|---|---|
| CN118697527A CN118697527A (en) | 2024-09-27 |
| CN118697527Btrue CN118697527B (en) | 2024-11-05 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411203425.2AActiveCN118697527B (en) | 2024-08-30 | 2024-08-30 | A variable diameter microcatheter and system |
| Country | Link |
|---|---|
| CN (1) | CN118697527B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119701171A (en)* | 2024-11-29 | 2025-03-28 | 中山大学附属第八医院（深圳福田） | Enhanced middle catheter assembly and conveying system |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116672570A (en)* | 2023-08-03 | 2023-09-01 | 北京久事神康医疗科技有限公司 | Low-pressure injection thrombolysis microcatheter |
| CN118304543A (en)* | 2024-06-07 | 2024-07-09 | 北京久事神康医疗科技有限公司 | Enhancement mode microcatheter and conveying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116672570A (en)* | 2023-08-03 | 2023-09-01 | 北京久事神康医疗科技有限公司 | Low-pressure injection thrombolysis microcatheter |
| CN118304543A (en)* | 2024-06-07 | 2024-07-09 | 北京久事神康医疗科技有限公司 | Enhancement mode microcatheter and conveying system |
| Publication number | Publication date |
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| CN118697527A (en) | 2024-09-27 |
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