技术领域technical field
本发明涉及医疗器械领域，具体地说，涉及一种泌尿系统结石腔内套取装置。The invention relates to the field of medical devices, in particular to a settling device for calculi in the urinary system cavity.
背景技术Background technique
肾结石是泌尿外科最常见的疾病之一，微创治疗技术已取代传统性开放手术成为肾结石最重要的治疗手段。微创治疗根本目的是完全清除结石。输尿管软镜通过人体自然腔道进入肾脏，通过钬激光粉碎结石，效果确切，是肾脏结石主要的微创治疗手段之一。为了提高结石的清除率，钬激光粉碎结石后，常采用套石篮套取较大的碎石。Kidney stones are one of the most common diseases in urology, and minimally invasive treatment techniques have replaced traditional open surgery as the most important treatment for kidney stones. The fundamental purpose of minimally invasive treatment is to completely remove stones. The flexible ureteroscope enters the kidney through the natural orifice of the human body, and the stone is crushed by the holmium laser. The effect is accurate, and it is one of the main minimally invasive treatment methods for kidney stones. In order to improve the stone-clearing rate, after the holmium laser pulverizes the stones, a stone basket is often used to collect the larger broken stones.
目前国内外应用的套石篮多为简单套篮结构。如中国专利ZL20122032508.7（公告日2013年1月16日；公告号：CN202665632U）公开的一种套石篮，用于泌尿科内窥镜配套对输尿管和肾结石取出，套石篮芯头部是几根具有弹性钢丝绕成，拉紧开关锁套石篮芯缩进外管内，外管直径为0.5-3mm。但是这款三角套石篮抓取效率不高，只能抓取一定直径大小的碎石，碎石过大无法通过操作通道，碎石过小容易从钢丝缝隙遗漏，一次性抓取过多，收紧内芯时网篮呈球形，其直径常超过操作通道或输尿管内径而易造成输尿管损伤或无法取出。另如中国专利ZL200620040173.7（公告日2007年3月7日；公告号：CN2875338Y）公开的一种输尿管网状套石篮，采用无毒、纤维尼龙丝制成，将结石套住后再进行碎石。该套石篮并不具备套取碎石的功能，只能被动套住结石便于操作，而没有主动抓取碎石的功能。Most of the stone baskets used at home and abroad are simple basket structures. For example, Chinese patent ZL20122032508.7 (announcement date: January 16, 2013; announcement number: CN202665632U) discloses a set of stone baskets, which are used to remove ureter and kidney stones with urological endoscopes, and the core head of the set stone basket It is made of several elastic steel wires, and the stone basket core is retracted into the outer tube when the switch lock sleeve is tightened. The diameter of the outer tube is 0.5-3mm. However, this triangular set of stone baskets is not efficient in grabbing. It can only grab gravel with a certain diameter. If the gravel is too large, it cannot pass through the operation channel. If the gravel is too small, it is easy to miss through the gap of the wire. When the inner core is tightened, the basket is spherical, and its diameter often exceeds the inner diameter of the operating channel or ureter, which may easily cause ureter damage or failure to take it out. Another example is the Chinese patent ZL200620040173.7 (announcement date: March 7, 2007; announcement number: CN2875338Y) which discloses a ureteral netted stone basket, which is made of non-toxic, fibrous nylon silk, and then the stones are encased before proceeding. gravel. This set of stone baskets does not have the function of trapping gravel, it can only passively trap the calculus for easy operation, but does not have the function of actively grabbing gravel.
总结得出，目前套石篮取石仍然存在以下不足：1）不管是三角套石篮还是网状套石篮，都采用了向心性收聚的设计，套取石块后呈球形，而非椭球形，套石的数量受限于输尿管管腔内径或操作通道的内径，需要反复进入输尿管道取石，效率低下；2）套石篮收取后钢丝间存在缝隙，尤其是网状套石篮收紧内芯后网孔易遗漏碎石，套石篮本身也不能阻挡结石，小石块和碎石在逆向水流的灌注下容易被冲回肾脏；3）结石的棱角会暴露于套石篮的网孔之外，容易导致套石篮无法通过操作通道，且极易划伤输尿管壁，引起手术并发症；4）对于肾脏内积聚的血块或者脓块，软镜下应用套石篮抓取困难，效率低下。It can be concluded that there are still the following deficiencies in the current set of stone baskets: 1) Whether it is a triangular set of stone baskets or a mesh set of stone baskets, they all adopt the design of centripetal collection, and the stones are spherical after being set, rather than elliptical. Spherical, the number of set stones is limited by the inner diameter of the ureter lumen or the inner diameter of the operating channel, and it is necessary to repeatedly enter the ureter to take stones, which is inefficient; 2) There are gaps between the steel wires after the set stone basket is collected, especially the mesh set stone basket is tightened The mesh behind the inner core is easy to miss stones, and the stone basket itself cannot stop stones, and small stones and gravels are easily washed back to the kidney under the infusion of reverse water flow; 3) The edges and corners of stones will be exposed to the mesh of the stone basket Outside the hole, it is easy to cause the stone basket to fail to pass through the operation channel, and it is very easy to scratch the ureteral wall, causing surgical complications; 4) For blood clots or pus accumulated in the kidney, it is difficult to grasp the stone basket under a soft microscope. low efficiency.
综上所述，亟需一种取石效率高、不会遗漏碎石、可同时套取血块和脓块、安全可靠的泌尿系统结石腔内套取装置，但是目前关于该类装置还未见报道。To sum up, there is an urgent need for a safe and reliable intracavitary extraction device for stones in the urinary system, which has high stone removal efficiency, does not miss broken stones, and can collect blood clots and pus at the same time. However, there are no reports about such devices so far .
发明内容Contents of the invention
本发明的目的是针对现有技术中的不足，提供一种泌尿系统结石腔内套取装置。The object of the present invention is to provide a device for extracting stones in the cavity of the urinary system aiming at the deficiencies in the prior art.
为实现上述目的，本发明采取的技术方案是：For realizing above-mentioned object, the technical scheme that the present invention takes is:
一种泌尿系统结石腔内套取装置，设有导管和导丝，所述导丝的远端设有网篮，所述网篮上固定有套石兜，所述套石兜被预塑成兜状且近端的一面是开口的，所述套石兜上还设有微孔。A device for removing stones in the cavity of the urinary system, which is provided with a catheter and a guide wire. The distal end of the guide wire is provided with a basket, and a stone pocket is fixed on the basket, and the stone pocket is pre-molded into a It is pocket-shaped and one side at the proximal end is open, and micropores are also arranged on the set of stone pockets.
所述的套石兜呈长条形兜状，且远端表面呈曲面状。The set of stone pockets is in the shape of a long strip, and the surface of the distal end is in the shape of a curved surface.
所述的套石兜由塑料或无纺布制成。The set of stone pockets is made of plastic or non-woven fabric.
所述的网篮由使用状态下呈曲线状的网篮丝组成，所述网篮丝的远端向着导管的中心轴方向收拢并与套石兜固定。The basket is composed of curved basket wires in use, and the distal end of the basket wires is gathered toward the central axis of the catheter and fixed with the stone pocket.
所述网篮丝远端双分叉为第一网篮丝和第二网篮丝，所述第一网篮丝和第二网篮丝与套石兜固定。The double fork at the far end of the wire is a first wire and a second wire, and the first wire and the second wire are fixed to the stone pocket.
所述的网篮由若干个椭圆形的网篮丝组成，各个网篮丝按照等边几何图形排布，且各个网篮丝的近端交汇融合成一股固定于导丝的远端；使用状态下，各个网篮丝所形成的面呈曲面状，均向着导管的中心轴方向收拢。The basket is composed of several elliptical basket wires, each of which is arranged according to an equilateral geometric figure, and the proximal ends of each basket wire meet and merge into one strand and are fixed on the distal end of the guide wire; in use state Next, the surface formed by each basket wire is in the shape of a curved surface, all of which are gathered towards the central axis of the catheter.
所述的网篮丝有三根或四根，各个网篮丝按照三角形或正方形排布。There are three or four basket wires, and each basket wire is arranged in a triangle or a square.
所述套石兜的近端边缘环绕固定于所述网篮靠近远端的区段上。The proximal edge of the set of stone pockets is fixed around the section near the distal end of the net basket.
所述的网篮呈椭环形，其在垂直于导丝的平面上的投影为圆环形。The mesh basket is in the shape of an ellipse, and its projection on a plane perpendicular to the guide wire is a circle.
所述的网篮丝由形状记忆材料制成。The basket wire is made of shape memory material.
所述的微孔直径为50-150nm。The diameter of the micropores is 50-150nm.
本发明优点在于：The present invention has the advantage that:
本发明针对泌尿系统结石的阻挡与高效取出问题，设计了具有透水微孔套石兜结构的泌尿系统结石一次性取出器械：Aiming at the problem of blocking and efficient removal of urinary system stones, the present invention designs a disposable device for removing urinary system stones with a water-permeable micro-hole stone pocket structure:
1、设有长条形兜状且横截面尺寸与手术通道鞘内径相当的套石兜，可容纳大量碎石，即使网兜内装满结石，其外形亦不会改变，仍可从鞘内通过，大大提高了取石效率；1. There is a long pocket-shaped stone pocket with a cross-sectional size equivalent to the inner diameter of the surgical channel sheath, which can accommodate a large amount of gravel. Even if the net pocket is filled with stones, its shape will not change, and it can still pass through the sheath. , greatly improving the stone extraction efficiency;
2、套石兜上不含有大型网孔，不存在缝隙，且其本身具有一定的塑形作用，因此能够有效避免套取碎石后碎石、血块和脓块遗漏，同时碎石的棱角不会暴露在外，进而不会摩擦损伤输尿管壁；2. There are no large mesh holes and gaps in the stone pocket, and it has a certain shaping effect, so it can effectively avoid the omission of broken stones, blood clots and pus after taking the broken stones. At the same time, the edges and corners of the broken stones are not will be exposed so as not to rub and damage the ureteral wall;
3、网篮设计有多种形式，三线、四线型网篮可以适应不同体积、位置的结石的取出，而且还能更好的维持套石兜的形状；椭环形网篮能最大程度地减少对碎石的阻碍作用，有利于碎石顺利的进入到套石兜的内部；3. There are various designs of mesh baskets. The three-line and four-line mesh baskets can adapt to the removal of stones of different sizes and positions, and can better maintain the shape of the stone pocket; the oval-shaped mesh basket can minimize the The hindering effect on the crushed stone is conducive to the smooth entry of the crushed stone into the interior of the stone pocket;
4、网篮丝为记忆金属丝，套石兜为塑料或无纺布材质薄膜，均能收缩成很小体积，容纳在导管内，便于本发明结石取出器的置入，不会推动结石逆行回肾脏，也不易损伤输尿管壁。4. The basket wire is a memory metal wire, and the stone pocket is made of plastic or non-woven material film, which can be shrunk into a small volume and accommodated in the catheter, which is convenient for the insertion of the stone remover of the present invention, and will not push the stone retrograde back to the kidney, and it is not easy to damage the ureteral wall.
附图说明Description of drawings
附图1是本发明的泌尿系统结石腔内套取装置的结构示意图。Accompanying drawing 1 is the schematic structural view of the device for removing stones in the urinary system cavity of the present invention.
附图2是图1中A的放大图。Accompanying drawing 2 is the enlarged view of A in Fig. 1.
附图3是实施例2的网篮丝的结构示意图。Accompanying drawing 3 is the structural representation of the wire basket wire of embodiment 2.
附图4是实施例3的网篮丝的结构示意图。Accompanying drawing 4 is the structural representation of the wire basket of embodiment 3.
附图5是实施例4的网篮丝的结构示意图。Accompanying drawing 5 is the structural representation of the wire basket wire of embodiment 4.
具体实施方式detailed description
下面结合附图对本发明提供的具体实施方式作详细说明。The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.
附图中涉及的附图标记和组成部分如下所示：The reference signs and components involved in the accompanying drawings are as follows:
1.导管2.导丝1. Catheter 2. Guide wire
3.网篮丝31.第一网篮丝3. Basket wire 31. The first basket wire
32.第二网篮丝4.套石兜32. Second net basket wire 4. Set of stone pockets
5.导管手柄51.第一螺纹5. Catheter handle 51. First thread
6.导丝手柄61.第二螺纹6. Guide wire handle 61. Second thread
7.网篮8.微孔7. Basket 8. Microporous
实施例1Example 1
请参照图1，图1是本发明的泌尿系统结石腔内套取装置的结构示意图。所述的泌尿系统结石腔内套取装置设有导管1、导丝2、网篮7和套石兜4。所述的导管1为圆柱形中空管体，近端的外周设有导管手柄5，所述的导管手柄5近端的内壁设有第一螺纹51。所述的导丝2为一细长丝，贯穿于导管1的内部。导丝2的近端设有导丝手柄6，所述的导丝手柄6远端的外部设有第二螺纹61。所述的第二螺纹61与所述的第一螺纹51相互匹配，旋紧后能将导丝2与导管1固定。所述的导丝2的远端设有网篮7。Please refer to FIG. 1 . FIG. 1 is a schematic diagram of the structure of the urinary system calculus intracavity extraction device of the present invention. The urinary system calculi intracavity extraction device is provided with a catheter 1 , a guide wire 2 , a basket 7 and a stone pocket 4 . The catheter 1 is a cylindrical hollow tube, a catheter handle 5 is provided on the outer periphery of the proximal end, and a first thread 51 is provided on the inner wall of the proximal end of the catheter handle 5 . The guide wire 2 is a long and thin wire that runs through the catheter 1 . The proximal end of the guide wire 2 is provided with a guide wire handle 6 , and the outside of the distal end of the guide wire handle 6 is provided with a second thread 61 . The second screw thread 61 matches the first screw thread 51, and can fix the guide wire 2 and the catheter 1 after tightening. The distal end of the guide wire 2 is provided with a basket 7 .
请参照图2，图2是图1中A的放大图。所述的网篮7包括三根网篮丝3。每根网篮丝3的近端与导丝2（图中未示出）固定，远端区段双分叉为第一网篮丝31和第二网篮丝32。使用状态下，所述的网篮丝3呈曲线状，每根网篮丝3的远端均向着导管1的中心轴方向收拢。所述的套石兜4被撑开成长条形的兜状，套石兜4远端的外表面呈曲面状，近端的一面是开口的，且近端的外壁与三根网篮丝3的第一网篮丝31和第二网篮丝32固定。所述的套石兜4上还设有微孔8。Please refer to FIG. 2 , which is an enlarged view of A in FIG. 1 . The net basket 7 includes three net basket wires 3 . The proximal end of each basket wire 3 is fixed to the guide wire 2 (not shown in the figure), and the distal section is bifurcated into a first basket wire 31 and a second basket wire 32 . In the state of use, the basket wires 3 are curved, and the distal ends of each basket wire 3 are drawn toward the central axis of the catheter 1 . Described stone pocket 4 is strutted into a strip-shaped pocket, and the outer surface of the far end of the stone pocket 4 is curved, and one side of the proximal end is open, and the outer wall of the proximal end is in contact with the three net basket wires 3. The first basket wire 31 and the second basket wire 32 are fixed. Microholes 8 are also provided on the set of stone pockets 4 .
需要说明的是：It should be noted:
本发明的泌尿系统结石腔内套取装置在未使用状态下，也即出厂时，所述的网篮丝3和套石兜4均收纳于导管1远端的腔体内，网篮丝3在导管1腔体的限定下聚拢成一束，套石兜4也褶皱聚拢成一束。In the unused state of the urinary system calculus intracavity extraction device of the present invention, that is, when leaving the factory, the net basket wire 3 and the stone pocket 4 are all accommodated in the cavity at the distal end of the catheter 1, and the net basket wire 3 is Gather into a bundle under the limitation of the catheter 1 cavity, and the sleeve stone pocket 4 is also folded into a bundle.
所述的套石兜4优选使用塑料膜制成，具体可以是TPU、Pebax、FEP、ETFE、TPFE等材质，其也可以使用无纺布等材质，只要保证褶皱折叠后体积较小，能够收纳于较细的导管1内即可。所述的套石兜4被预塑成长条形的兜状，近似于子弹的形状，该形状可容纳较多碎石，显著提高取石效率。套石兜4横断面最大的直径设计成与手术通道鞘内径相当，即使网兜内装满结石，其外形亦不会改变，仍可从鞘内通过。由于套石兜4上并不含有大型网孔，不存在缝隙，且其本身具有一定的塑形作用，因此能够有效避免碎石、血块和脓块遗漏，同时碎石的棱角不会暴露在外，也就不会摩擦损伤输尿管壁。套石兜4上设有微孔8，所述微孔8直径优选为50-150nm，最优选100nm，可供水顺畅通过而碎石、血块和脓块均不能通过。The set stone pocket 4 is preferably made of plastic film, specifically materials such as TPU, Pebax, FEP, ETFE, TPFE, etc. It can also use materials such as non-woven fabrics, as long as the volume is small after the folds are folded, it can be accommodated Just in the thinner catheter 1. The stone pocket 4 is preformed into an elongated pocket, which is similar to the shape of a bullet. This shape can accommodate more broken stones and significantly improve the efficiency of stone extraction. Cover stone bag 4 cross-section maximum diameters to be designed to be suitable with operation channel sheath inner diameter, even if be filled with calculus in the net bag, its shape also can not change, still can pass through in the sheath. Because the stone pocket 4 does not contain large mesh holes, there is no gap, and it has a certain shaping effect, so it can effectively avoid the omission of gravel, blood clots and pus, and at the same time, the edges and corners of the gravel will not be exposed. It will not rub and damage the ureteral wall. The stone pocket 4 is provided with micropores 8, the diameter of which is preferably 50-150nm, most preferably 100nm, allowing water to pass through smoothly but gravel, blood clots and pus clots cannot pass through.
所述的网篮丝3为记忆材料制成，如记忆金属丝，具体如钛镍合金材质，从导管1腔体内释放后，其可自然展开恢复成曲线形状。网篮丝3的作用是固定和维持套石兜4的形状，保证其近端边缘展开并尽量与输尿管壁贴合，不会在水流的冲击下变形，拖移结石时也不会变形。网篮丝3的数量不仅限于本实施例，也可以是三根、四根、五根、七根、八根等若干根，只要保证能有效支撑套石兜4且其疏密程度不会阻碍碎石进入即可。所述的网篮丝3和套石兜4的固定方式也不仅限于本实施例，网篮丝3也可以固定于套石兜4的内壁上，网篮丝3的远端也可不设第一网篮丝31和第二网篮丝32的双分叉结构，只要保证能够与套石兜4有效固定即可，但双分叉的网篮丝3增加了与套石兜4的固定面积，固定效果更好。The basket wire 3 is made of a memory material, such as a memory wire, specifically a titanium-nickel alloy material, and after being released from the cavity of the catheter 1, it can naturally unfold and return to a curved shape. The function of the wire basket 3 is to fix and maintain the shape of the stone pocket 4, to ensure that its proximal edge is expanded and fitted to the ureter wall as much as possible, so that it will not be deformed under the impact of the water flow, nor will it be deformed when the calculus is dragged. The quantity of net basket wire 3 is not limited to the present embodiment, also can be several such as three, four, five, seven, eight, as long as guarantee can effectively support sleeve stone pocket 4 and its degree of density can not hinder broken Stone can enter. The fixing method of described net basket wire 3 and cover stone pocket 4 is not limited to this embodiment, and net basket silk 3 also can be fixed on the inwall of cover stone pocket 4, and the far-end of net basket silk 3 also can not establish first The double-fork structure of the net basket wire 31 and the second net basket wire 32 can be effectively fixed with the stone pocket 4 as long as it is guaranteed, but the double-fork net basket wire 3 increases the fixed area with the stone pocket 4, Fixed better.
所述的导管1可将网篮丝3和套石兜4收纳于腔内，在置入本发明的泌尿系统结石腔内套取装置时，可很容易地绕开结石，不易造成结石移位，亦不会损伤输尿管壁。所述的导丝2用于操控网篮丝3和套石兜4的收纳及释放。所述的导管手柄5和导丝手柄6上设有彼此匹配的螺纹，当本发明的泌尿系统结石腔内套取装置达到目标位置后，可将导管1和导丝2固定住，从而保证网篮丝3和套石兜4不变形。The catheter 1 can accommodate the basket wire 3 and the stone pocket 4 in the cavity, and when the device for removing stones in the urinary system cavity of the present invention is inserted, the stones can be easily bypassed and the stones are not easy to be displaced. , and will not damage the ureteral wall. The guide wire 2 is used to control the storage and release of the basket wire 3 and the stone pocket 4 . The catheter handle 5 and the guide wire handle 6 are provided with matching threads, and when the urinary system calculus intracavity extraction device of the present invention reaches the target position, the catheter 1 and the guide wire 2 can be fixed, thereby ensuring that the net The basket wire 3 and the stone pocket 4 are not deformed.
本文中，所述的“近端”是指手术过程中距离术者较近的一端，所述的“远端”是指手术过程中距离术者较远的一端。Herein, the "proximal end" refers to the end closer to the operator during the operation, and the "distal end" refers to the end farther away from the operator during the operation.
本发明的泌尿系统结石腔内套取装置的使用方法如下：输尿管镜碎石术时，形成内窥镜工作通道，置入内窥镜；拆开本发明的泌尿系统结石腔内套取装置的出厂包装，手持导管手柄5和导丝手柄6将导管1的远端进入到输尿管，绕开结石并放在结石上方，向远端推动导丝手柄6，然后螺纹旋紧导丝手柄6和导管手柄5以固定导管1和导丝2，此时网篮丝3撑开恢复成曲线状，套石兜4随之也被撑开；进行碎石操作，待结石都破碎成2mm左右的碎屑时，一边缓慢退出本发明的泌尿系统结石腔内套取装置，一边通过内窥镜工作通道向输尿管持续注水，使得结石碎屑、血块、脓块冲入套石兜4内，而水则通过微孔8透出在套石兜4之外；最终，结石碎屑、血块、脓块存于套石兜4中被取出。The using method of the urinary system calculus intracavity extraction device of the present invention is as follows: during ureteroscopic lithotripsy, an endoscope working channel is formed and the endoscope is inserted; In the factory package, hold the catheter handle 5 and the guide wire handle 6, insert the distal end of the catheter 1 into the ureter, bypass the stone and place it on the stone, push the guide wire handle 6 to the distal end, and then screw the guide wire handle 6 and the catheter tightly The handle 5 is used to fix the catheter 1 and the guide wire 2. At this time, the basket wire 3 is stretched back into a curved shape, and the stone pocket 4 is also stretched accordingly; the stone crushing operation is performed until the stones are broken into debris of about 2mm While slowly withdrawing from the urinary system calculus intracavity extraction device of the present invention, water is continuously injected into the ureter through the endoscope working channel, so that calculus debris, blood clots, and pus are washed into the calculus pocket 4, and water passes through the ureter. The micropores 8 are exposed outside the stone pocket 4; finally, calculus debris, blood clots, and pus are stored in the stone pocket 4 and taken out.
本发明的泌尿系统结石腔内套取装置能够一次性套取大量碎石、血块和脓块，不受输尿管管腔内径或操作通道内径的限制，取石构成不容易遗漏碎石，有效避免碎石被水流灌注回肾脏，同时还能避免碎石对输尿管壁造成损伤，安全可靠。The device for removing stones in the urinary system cavity of the present invention can remove a large amount of crushed stones, blood clots and pus at one time, and is not limited by the inner diameter of the ureteral lumen or the inner diameter of the operation channel. It is perfused back to the kidney by the water flow, and at the same time, it can avoid damage to the ureter wall caused by gravel, which is safe and reliable.
本发明的泌尿系统结石腔内套取装置不仅可用于输尿管结石的封堵和移除，还可应用于其他体腔的封堵和异物移除，包括但不限于以下应用：用于肾结石的封堵及移除，血管血栓的封堵和移除，血管穿刺孔封堵止血，体腔异物的封堵和移除如气管、肠道中异物的处理。The urinary system calculi intracavity extraction device of the present invention can not only be used for the blockage and removal of ureteral calculi, but also can be applied to the blockage and foreign body removal of other body cavities, including but not limited to the following applications: for the blockage of kidney stones Blockage and removal, blockage and removal of vascular thrombus, blockage and hemostasis of vascular puncture holes, blockage and removal of foreign bodies in body cavities, such as the treatment of foreign bodies in the trachea and intestinal tract.
实施例2Example 2
请参照图3，图3是实施例2的网篮丝的结构示意图。所述的网篮7为三线型网篮，具体地，网篮7由三根椭圆形的网篮丝3构成，三根网篮丝3呈三角形排布；每根网篮丝3靠近近端的半个区段均和另外两根网篮丝3交汇融合，最终三根网篮丝3的近端交汇融合成一股固定于导丝2的远端；使用状态下，每根网篮丝3所形成的面为曲面状，均向着导管1（图中未示出）的中心轴方向收拢；所述的套石兜4（图中未示出）的近端边缘环绕固定于所述网篮7靠近远端的区段上。Please refer to FIG. 3 . FIG. 3 is a schematic structural view of the basket wire in Embodiment 2. The net basket 7 is a three-wire net basket, specifically, the net basket 7 is made of three oval net basket wires 3, and the three net basket wires 3 are arranged in a triangle; Half of the sections are merged with the other two basket wires 3, and finally the proximal ends of the three basket wires 3 converge and fuse to form a strand fixed at the distal end of the guide wire 2; in use, each basket wire 3 forms The surface is curved, and they are all gathered towards the central axis of the catheter 1 (not shown in the figure); on the remote segment.
实施例3Example 3
请参照图4，图4是实施例3的网篮丝的结构示意图。所述的网篮7为四线型网篮，具体地，网篮7由四根椭圆形的网篮丝3构成，四根网篮丝3呈正方形排布；每根网篮丝3靠近近端的半个区段均和相邻的两根网篮丝3交汇融合，最终四根网篮丝3的近端交汇融合成一股固定于导丝2的远端；使用状态下，每根网篮丝3所形成的面为曲面状，均向着导管1（图中未示出）的中心轴方向收拢。Please refer to FIG. 4 . FIG. 4 is a schematic structural view of the basket wire in Embodiment 3. The net basket 7 is a four-line net basket, specifically, the net basket 7 is made of four oval net basket wires 3, and the four net basket wires 3 are arranged in a square; The half section of the end is all merged with the two adjacent basket wires 3, and finally the proximal ends of the four basket wires 3 converge and fuse into one strand and are fixed on the distal end of the guide wire 2; The surface formed by the basket wire 3 is curved, and all of them converge toward the central axis of the catheter 1 (not shown in the figure).
需要说明的是，实施例2和3的三线、四线型网篮可以适应不同体积、位置的结石的取出，而且该种形状的网篮7使得套石兜4近端边缘均处于固定状态，所以能更好的维持套石兜4的形状。本发明中，网篮7并不仅限于实施例1-3三种形状，还可以使其它形状，只要保证能有效支撑套石兜4且其疏密程度不会阻碍碎石进入即可。It should be noted that the three-line and four-line mesh baskets of Embodiments 2 and 3 can be adapted to take out stones of different volumes and positions, and the mesh basket 7 of this shape makes the proximal edge of the stone pocket 4 all be in a fixed state, Therefore, the shape of the stone pocket 4 can be better maintained. Among the present invention, net basket 7 is not limited to three kinds of shapes of embodiment 1-3, can also make other shapes, as long as guarantee can effectively support sleeve stone bag 4 and its degree of density can not hinder gravel to enter and get final product.
实施例4Example 4
请参照图5，图5是实施例4的网篮丝的结构示意图。所述的网篮7大体呈椭环形，所形成的面为曲面状，其在垂直于导丝2的平面上的投影为圆环形。具体地，所述的网篮7由一根椭圆形的网篮丝3构成，且其长轴的一端端点固定在导丝2的远端。所述的套石兜4的近端边缘环绕固定于网篮7上。Please refer to FIG. 5 . FIG. 5 is a schematic structural view of the basket wire of Embodiment 4. The net basket 7 is generally in the shape of an ellipse, and the formed surface is curved, and its projection on a plane perpendicular to the guide wire 2 is a circular shape. Specifically, the basket 7 is composed of an elliptical basket wire 3 , and one end of its long axis is fixed at the distal end of the guide wire 2 . The proximal edge of the set stone pocket 4 is fixed on the net basket 7 around.
本实施例中，所述的网篮7仅由单根网篮丝3构成一个椭环形，网篮丝3的数目减至最低，能最大程度地减少对碎石的阻碍作用，有利于碎石顺利的进入到套石兜4内部。In the present embodiment, the net basket 7 is only composed of a single net basket wire 3 to form an ellipse, and the number of the net basket wire 3 is reduced to a minimum, which can minimize the hindrance to gravel, which is beneficial to the crushed stone. Enter the inside of the set of stone pockets 4 smoothly.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明方法的前提下，还可以做出若干改进和补充，这些改进和补充也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the method of the present invention, some improvements and supplements can also be made, and these improvements and supplements should also be considered Be the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410334420.3ACN104095666B (en) | 2014-07-15 | 2014-07-15 | Urinary system calculus intracavity extracts device |
| PCT/CN2015/071184WO2016008293A1 (en) | 2014-07-15 | 2015-01-21 | Urinary system stone intraluminal sleeving and removal apparatus |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410334420.3ACN104095666B (en) | 2014-07-15 | 2014-07-15 | Urinary system calculus intracavity extracts device |
| Publication Number | Publication Date |
|---|---|
| CN104095666A CN104095666A (en) | 2014-10-15 |
| CN104095666Btrue CN104095666B (en) | 2016-04-13 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201410334420.3AActiveCN104095666B (en) | 2014-07-15 | 2014-07-15 | Urinary system calculus intracavity extracts device |
| Country | Link |
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| CN (1) | CN104095666B (en) |
| WO (1) | WO2016008293A1 (en) |
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