CN102716543A - Magnetic catheter with trawl wire capture capability - Google Patents

Abstract

Translated fromChinese

本发明公开了一种具有网线捕获能力的磁性导尿管，在磁性导尿管靠近自身头部处设置有磁性部，同时，磁性部的外表面设置有多个一端与磁性导尿管相连，另一端朝向磁性导尿管尾部的倒钩。在使用本发明所提供的磁性导尿管时，采用常规留置导尿管操作将磁性导尿管送入患者的前尿道。在磁性部吸附住能被磁体吸附的拖网后，向外拉磁性导尿管，此时，设置在磁性部外表面的倒钩能够钩住拖网，防止拖网从磁性导尿管上滑脱，从而提高了将拖网引出尿道口这一操作的成功率，实现了快速拔除被植入患者体内的设置有拖网的输尿管支架管的目的。

The invention discloses a magnetic urinary catheter with the ability to capture net wires. A magnetic part is arranged near the head of the magnetic catheter. At the same time, the outer surface of the magnetic part is provided with a plurality of ends connected to the magnetic catheter. The other end faces the barb on the tail of the magnetic catheter. When using the magnetic urinary catheter provided by the present invention, the magnetic urinary catheter is sent into the patient's anterior urethra by conventional indwelling catheter operation. After the magnetic part absorbs the trawl that can be absorbed by the magnet, the magnetic catheter is pulled outward. At this time, the barbs arranged on the outer surface of the magnetic part can hook the trawl to prevent the trawl from slipping off the magnetic catheter, thereby improving The success rate of the operation of leading the trawl net out of the urethral opening has been improved, and the purpose of quickly pulling out the ureteral stent tube implanted in the patient's body is provided with the trawl net.

Description

Translated fromChinese

一种具有网线捕获能力的磁性导尿管A Magnetic Urinary Catheter Capable of Catching Mesh Wires

技术领域technical field

本发明涉及医疗器械技术领域，更具体地说，涉及一种具有网线捕获能力的磁性导尿管。The invention relates to the technical field of medical instruments, in particular to a magnetic urinary catheter with the ability to capture mesh wires.

背景技术Background technique

输尿管支架管一种应用于肾脏、输尿管等上尿道手术中用于保持上尿路引流的医疗器械。传统的输尿管支架管需要利用膀胱镜进行拔除，给患者带来了很大的痛苦。由此，本领域技术人员研究出了一种输尿管支架装置，以实现减轻在拔除输尿管支架管过程中给患者带来的痛苦和不适。该输输尿管支架装置包括设置有拖网的输尿管支架管和设置有磁性部的导尿管，请参考图1和图2，输尿管支架管包括支架管本体01、连接于支架管本体01一端的牵引线02和固定连接于牵引线02自由端的拖网03，拖网03中设置有能被磁体吸附的铁质材料；导尿管04包括内芯041和外鞘042，内芯041可滑动地套装于外鞘042中，内芯头部靠后位置设置有磁性部0411，外鞘042的头部内表面为圆锥状斜面，圆锥状斜面与内芯041的外表面围成了拖网固定腔。Ureteral stent is a medical device used in upper urinary tract operations such as kidneys and ureters to maintain drainage of the upper urinary tract. The traditional ureteral stent needs to be removed by cystoscope, which brings great pain to the patient. Therefore, those skilled in the art have developed a ureteral stent device to reduce the pain and discomfort brought to the patient during the process of removing the ureteral stent tube. The ureteral stent device includes a ureteral stent tube provided with a trawl net and a catheter provided with a magnetic part, please refer to Figure 1 and Figure 2, the ureteral stent tube includes astent tube body 01, a traction wire connected to one end of thestent tube body 01 02 and thetrawl 03 fixedly connected to the free end of thetraction line 02, thetrawl 03 is provided with iron material that can be absorbed by magnets; thecatheter 04 includes aninner core 041 and anouter sheath 042, and theinner core 041 is slidably sleeved in the outer sheath In 042, amagnetic part 0411 is provided at the rear position of the head of the inner core, and the inner surface of the head of theouter sheath 042 is a conical slope, and the conical slope and the outer surface of theinner core 041 enclose a trawl fixed cavity.

在需要将上述的输尿管支架管从患者体内取出时，首先将上述的导尿管04采用常规留置导尿管的操作送入患者的前尿道，再利用磁性部0411吸附拖网03中的铁质材料，然后向后拉动内芯041，使拖网03嵌入拖网固定腔，再整体向外拉动导尿管04，可使拖网03顺利引出尿道口，此时即可通过拉拽拖网03，将通过牵引线02与拖网03相连的支架管本体01从病人体内取出，从而完成拔除输尿管支架管的操作。When the above-mentioned ureteral stent tube needs to be taken out from the patient, firstly, the above-mentionedurinary catheter 04 is sent into the patient's anterior urethra through the operation of conventional indwelling catheter, and then themagnetic part 0411 is used to absorb the iron material in thetrawl 03 , and then pull theinner core 041 backward to make thetrawl 03 embedded in the fixed cavity of the trawl, and then pull thecatheter 04 outward as a whole, so that thetrawl 03 can be smoothly drawn out of the urethral opening. 02 Thestent tube body 01 connected with thetrawl net 03 is taken out from the patient's body, thereby completing the operation of pulling out the ureteral stent tube.

通过使用上述的输尿管支架装置，操作人员在拔除输尿管支架管时不使用膀胱镜，避免了患者因膀胱镜拔除操作所受到的痛苦和不适。但是，在通过磁性部0411定位拖网03后，需要利用内芯041和外鞘042的配合将拖网03嵌入拖网固定腔，进而对拖网03进行拉拽；由于拖网03、内芯041和外鞘042的外表面都很光滑，同时上述的操作在患者的膀胱内进行，膀胱内残存的尿液又起到了一定的润滑作用，导致拖网03很容易从导尿管上滑脱，上述的“使拖网03嵌入拖网固定腔”不容易实现，操作人员需要进行多次尝试才能成功。By using the above-mentioned ureteral stent device, the operator does not use a cystoscope when pulling out the ureteral stent tube, thereby avoiding the pain and discomfort suffered by the patient due to the operation of removing the cystoscope. However, after thetrawl 03 is positioned by themagnetic part 0411, thetrawl 03 needs to be embedded in the trawl fixing cavity by the cooperation of theinner core 041 and theouter sheath 042, and then thetrawl 03 is pulled; The outer surface of thetrawl net 03 is very smooth, and at the same time, the above-mentioned operation is carried out in the bladder of the patient, and the residual urine in the bladder plays a certain lubricating effect, so that thetrawl net 03 is easy to slip off from the catheter. "Embedding in the trawl fixed cavity" is not easy to achieve, and the operator needs to make many attempts to succeed.

由以上所述，如何提供一种导尿管，以实现快速拔除上述的设置有拖网的输尿管支架管的目的，成为本领域技术人员亟需解决的技术问题。From the above, how to provide a urinary catheter to achieve the purpose of quickly removing the above-mentioned ureteral stent provided with the trawl has become a technical problem urgently to be solved by those skilled in the art.

发明内容Contents of the invention

有鉴于此，本发明提供一种具有网线捕获能力的磁性导尿管，用于快速拔除被植入患者体内的设置有拖网的输尿管支架管。In view of this, the present invention provides a magnetic ureteral catheter with the ability to capture mesh wires, which is used to quickly remove the ureteral stent implanted in the patient's body and provided with a dragnet.

为实现上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:

一种具有网线捕获能力的磁性导尿管，磁性导尿管靠近自身头部处设置有磁性部，磁性部的外表面设置有多个一端与磁性导尿管相连，另一端朝向磁性导尿管尾部的倒钩。A magnetic catheter with the ability to catch the net wire. The magnetic catheter is provided with a magnetic part near its head. Tail barb.

优选的，在上述的磁性导尿管中，磁性部为磁性材料或软磁材料。Preferably, in the above-mentioned magnetic urinary catheter, the magnetic part is made of magnetic material or soft magnetic material.

优选的，在上述的磁性导尿管中，磁性部为磁性橡胶或软磁塑料。Preferably, in the above-mentioned magnetic urinary catheter, the magnetic part is magnetic rubber or soft magnetic plastic.

优选的，在上述的磁性导尿管中，倒钩的钩尖朝向磁性导尿管表面。Preferably, in the above-mentioned magnetic catheter, the tip of the barb is facing the surface of the magnetic catheter.

优选的，在上述的磁性导尿管中，钩尖为圆滑钩尖。Preferably, in the above-mentioned magnetic catheter, the hook point is a smooth hook point.

优选的，在上述的磁性导尿管中，多个倒钩在磁性导尿管的表面交错排列。Preferably, in the above-mentioned magnetic urinary catheter, a plurality of barbs are arranged in a staggered manner on the surface of the magnetic urinary catheter.

优选的，在上述的磁性导尿管中，磁性导尿管上设置有倒钩处的直径小于磁性导尿管其他位置处的直径。Preferably, in the above-mentioned magnetic catheter, the diameter of the barb on the magnetic catheter is smaller than the diameter of other positions of the magnetic catheter.

优选的，在上述的磁性导尿管中，磁性导尿管设置有椭圆球体头部，椭圆球体头部的最大半径大于磁性导尿管其他横截面的半径。Preferably, in the above-mentioned magnetic catheter, the magnetic catheter is provided with an ellipsoidal head, and the maximum radius of the ellipsoidal head is greater than the radii of other cross-sections of the magnetic catheter.

优选的，在上述的磁性导尿管中，还包括套设于磁性导尿管外部的外鞘，外鞘的外径小于椭圆球体头部的最大直径，外鞘的内径大于磁性导尿管的直径。Preferably, in the above-mentioned magnetic catheter, it also includes an outer sheath sleeved on the outside of the magnetic catheter, the outer diameter of the outer sheath is smaller than the maximum diameter of the ellipsoid head, and the inner diameter of the outer sheath is larger than that of the magnetic catheter. diameter.

本发明提供了一种具有网线捕获能力的磁性导尿管，在磁性导尿管靠近自身头部处设置有磁性部，同时，磁性部的外表面设置有多个一端与磁性导尿管相连，另一端朝向磁性导尿管尾部的倒钩。The present invention provides a magnetic catheter with the ability to capture wires. A magnetic part is provided near the head of the magnetic catheter. At the same time, the outer surface of the magnetic part is provided with a plurality of ends connected to the magnetic catheter. The other end faces the barb on the tail of the magnetic catheter.

在使用本发明所提供的磁性导尿管时，采用常规留置导尿管操作将磁性导尿管送入患者的前尿道。在磁性部吸附住能被磁体吸附的拖网，向外拉磁性导尿管，此时，设置在磁性部外表面的倒钩能够钩住拖网，防止拖网从磁性导尿管上滑脱，从而提高了将拖网引出尿道口这一操作的成功率，实现了快速拔除被植入患者体内的设置有拖网的输尿管支架管的目的。When using the magnetic urinary catheter provided by the present invention, the magnetic urinary catheter is sent into the patient's anterior urethra by conventional indwelling catheter operation. The trawl that can be absorbed by the magnet is adsorbed on the magnetic part, and the magnetic catheter is pulled outward. At this time, the barbs arranged on the outer surface of the magnetic part can hook the trawl to prevent the trawl from slipping off the magnetic catheter, thereby improving The success rate of the operation of leading the trawl out of the urethral opening has achieved the purpose of quickly removing the ureteral stent tube implanted in the patient's body.

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

图1为现有技术中设置有拖网的输尿管支架管的结构示意图；Fig. 1 is the structural representation that is provided with the ureteral support tube of trawl net in the prior art;

图2为现有技术中设置有磁性部的导尿管的结构示意图；Fig. 2 is a structural schematic diagram of a urinary catheter provided with a magnetic part in the prior art;

图3为本发明实施例所提供的磁性导尿管的结构示意图；Fig. 3 is a schematic structural view of a magnetic urinary catheter provided by an embodiment of the present invention;

图4为倒钩的钩尖朝向磁性导尿管表面的示意图；Fig. 4 is a schematic diagram of the hook point of the barb facing the surface of the magnetic catheter;

图5为倒钩的钩尖朝向磁性导尿管头部的示意图；Fig. 5 is a schematic diagram of the hook point of the barb towards the head of the magnetic catheter;

图6为交错排列的倒钩的示意图；Figure 6 is a schematic diagram of staggered barbs;

图7为磁性导尿管上设置有倒钩处的直径小于其他部位直径的示意图；Fig. 7 is a schematic diagram showing that the diameter of the barb on the magnetic catheter is smaller than that of other parts;

图8为设置有椭圆球体头部的磁性导尿管的示意图；Fig. 8 is a schematic diagram of a magnetic catheter provided with an ellipsoidal head;

图9为本发明实施例所提供的包含有外鞘的磁性导尿管的结构示意图。Fig. 9 is a schematic structural view of a magnetic urinary catheter with an outer sheath provided by an embodiment of the present invention.

以上图1-9中：In the above figure 1-9:

支架管本体01、牵引线02、拖网03、导尿管04、内芯041、磁性部0411、外鞘042；Stent tube body 01, pullingwire 02,trawl 03,catheter 04,inner core 041,magnetic part 0411,outer sheath 042;

磁性导尿管10、磁性部11、倒钩20、钩柄21、钩尖22、外鞘30。Magneticurinary catheter 10 , magnetic part 11 ,barb 20 ,hook handle 21 ,hook tip 22 ,outer sheath 30 .

具体实施方式Detailed ways

本发明提供一种具有网线捕获能力的磁性导尿管，用于快速拔除被植入患者体内的设置有拖网的输尿管支架管。The invention provides a magnetic urinary catheter with the ability to catch net wires, which is used for quickly removing a ureteral stent tube implanted in a patient's body and equipped with a trawl net.

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

如图3所示，本发明实施例所提供的具有网线捕获能力的磁性导尿管10在靠近自身头部处设置有磁性部11，在磁性部11的外表面设置有多个倒钩20，倒钩20通过钩柄21与磁性导尿管10相连，倒钩20与导尿管10之间的开口方向朝向磁性导尿管10的尾部。As shown in FIG. 3 , the magneticurinary catheter 10 provided by the embodiment of the present invention with the ability to capture wires is provided with a magnetic part 11 near its head, and a plurality ofbarbs 20 are provided on the outer surface of the magnetic part 11 . Thebarb 20 is connected with themagnetic catheter 10 through thehook handle 21 , and the opening direction between thebarb 20 and thecatheter 10 is toward the tail of themagnetic catheter 10 .

在使用本发明所提供的磁性导尿管10时，采用常规留置导尿管操作将磁性导尿管10送入患者的前尿道。在磁性部11吸附住能被磁体吸附的拖网，向外拉磁性导尿管10，此时，设置在磁性部11外表面的倒钩20能够钩住拖网，防止拖网从磁性导尿管10上滑脱，从而提高了将拖网引出尿道口这一操作的成功率，实现了快速拔除被植入患者体内的设置有拖网的输尿管支架管的目的。When using the magneticurinary catheter 10 provided by the present invention, the magneticurinary catheter 10 is sent into the patient's anterior urethra by conventional indwelling catheter operation. The trawl net that can be absorbed by the magnet is adsorbed at the magnetic part 11, and themagnetic catheter 10 is pulled outwards. slipping, thereby improving the success rate of the operation of leading the trawl out of the urethral opening, and realizing the purpose of quickly removing the ureteral stent tube implanted in the patient's body with the trawl.

进一步的，在上述实施例所提供的磁性导尿管中，磁性部11为磁性材料或软磁材料，优选地，磁性部11为磁性橡胶或软磁塑料。Further, in the magnetic catheter provided in the above embodiment, the magnetic part 11 is made of magnetic material or soft magnetic material, preferably, the magnetic part 11 is made of magnetic rubber or soft magnetic plastic.

具体的，如图4所示，在上述实施例所提供的磁性导尿管中，倒钩20的钩尖22朝向磁性导尿管10的表面。可以想到，在拖网上的网线进入倒钩20与磁性导尿管10表面之间的空间后，如果磁性导尿管10依然向前运动，网线会从倒钩20中脱出，导致拖网从磁性导尿管上滑脱。通过将倒钩20的钩尖22设置为朝向磁性导尿管10的表面，当网线将要从倒钩20中脱出时，会被钩尖22钩住，从而避免了拖网从磁性导尿管上滑脱的现象。本领域技术人员可以想到的是，还可以将倒钩20设置为钩尖22朝向磁性导尿管10头部的形式，如图5所示。Specifically, as shown in FIG. 4 , in the magnetic urinary catheter provided in the above embodiment, thehook tip 22 of thebarb 20 faces the surface of the magneticurinary catheter 10 . It is conceivable that after the net wire on the trawl enters the space between thebarb 20 and the surface of themagnetic catheter 10, if themagnetic catheter 10 still moves forward, the net wire will come out from thebarb 20, causing the trawl to go out of the magnetic catheter. Slip on the urethra. By setting thehook point 22 of thebarb 20 toward the surface of themagnetic catheter 10, when the net wire is about to come out of thebarb 20, it will be hooked by thehook point 22, thereby preventing the trawl from slipping off the magnetic catheter The phenomenon. Those skilled in the art can imagine that thebarb 20 can also be set in such a way that thehook tip 22 faces the head of themagnetic catheter 10 , as shown in FIG. 5 .

优选地，在上述实施例中，钩尖22为圆滑钩尖。由于人体内部的粘膜较为脆弱，锋利的钩尖在滑过时会划伤粘膜表面。将钩尖22设置为圆滑钩尖，可以避免这一问题。Preferably, in the above embodiments, thehook tip 22 is a rounded hook tip. Because the mucous membrane inside the human body is relatively fragile, the sharp hook tip will scratch the surface of the mucous membrane when it slides over. This problem can be avoided by setting thehook point 22 as a smooth hook point.

进一步的，在上述实施例中，多个倒钩20在磁性导尿管10的表面交错排列，如图6所示。通过实践得知，在将倒钩20设置为交错排列的样式后，能够提高倒钩20捕获拖网的能力，从而进一步减少操作人员在使用磁性导尿管拔除输尿管支架管时所需的尝试次数。Further, in the above embodiment, a plurality ofbarbs 20 are arranged in a staggered manner on the surface of the magneticurinary catheter 10 , as shown in FIG. 6 . It is known through practice that after thebarbs 20 are arranged in a staggered pattern, the ability of thebarbs 20 to catch the trawl can be improved, thereby further reducing the number of attempts required by the operator when using the magnetic catheter to remove the ureteral stent.

为了进一步防止设置在磁性导尿管表面的倒钩划伤人体内部的粘膜，如图7所示，磁性导尿管10上设置有倒钩20处的直径小于磁性导尿管10上其它位置处的直径。可以看到，倒钩20的高度低于磁性导尿管10上未设置倒钩表面的高度，这样，在将磁性导尿管10推入患者的前尿道时，磁性导尿管10上未设置倒钩处部分能够撑开前尿道，从而避免了倒钩20与人体内部粘膜的接触，也就防止了倒钩20划伤人体内部粘膜。In order to further prevent the barbs arranged on the surface of the magnetic catheter from scratching the mucous membrane inside the human body, as shown in Figure 7, the diameter of thebarb 20 on themagnetic catheter 10 is smaller than that at other positions on themagnetic catheter 10. diameter of. It can be seen that the height of thebarb 20 is lower than the height of the barb-free surface on themagnetic catheter 10, so that when themagnetic catheter 10 is pushed into the patient's anterior urethra, no barb is provided on themagnetic catheter 10. The part of the barb can stretch the anterior urethra, thereby avoiding the contact between thebarb 20 and the inner mucous membrane of the human body, and preventing thebarb 20 from scratching the inner mucous membrane of the human body.

优选地，在上述实施例所提供的磁性导尿管中，磁性导尿管10的头部为椭圆球体，如图8所示，同时，椭圆球体头部的最大半径大于磁性导尿管其它横截面的半径。在将磁性导尿管10置入患者的尿道后，前端膨大的椭圆球体头部能够撑开尿道，从而避免尿道粘膜被导尿管的其它部位划伤。Preferably, in the magnetic catheter provided by the above-mentioned embodiment, the head of themagnetic catheter 10 is an ellipsoid, as shown in FIG. The radius of the section. After themagnetic catheter 10 is inserted into the patient's urethra, the swollen ellipsoidal head at the front end can stretch the urethra, thereby preventing the urethral mucosa from being scratched by other parts of the catheter.

为了防止在向外拉拽拖网时倒钩20因受力而变形进而导致拖网从磁性导尿管上滑脱，在上述实施例的基础上，本发明实施例所提供的磁性导尿管还包括外鞘30。如图9所示，外鞘30为空心管状结构套设在磁性导尿管10的外部，同时，外鞘30的外径小于上述椭圆体头部的最大直径，而外鞘30的内径大于磁性导尿管的直径。可以想到的是，外鞘30可以在磁性导尿管10外滑动。In order to prevent thebarb 20 from deforming due to force when the trawl is pulled outwards and cause the trawl to slip off from the magnetic catheter, on the basis of the above-mentioned embodiments, the magnetic catheter provided by the embodiment of the present invention also includes anouter Sheath 30. As shown in Figure 9, theouter sheath 30 is a hollow tubular structure sleeved on the outside of themagnetic catheter 10. At the same time, the outer diameter of theouter sheath 30 is smaller than the maximum diameter of the above-mentioned ellipsoidal head, and the inner diameter of theouter sheath 30 is larger than the magnetic catheter. The diameter of the catheter. It is conceivable that theouter sheath 30 can slide over themagnetic catheter 10 .

在使用本发明实施例所提供的磁性导尿管拔除输尿管支架管时，首先将外鞘30卡在磁性导尿管10的椭圆体头部后方，将两者共同推入患者的尿道；在磁性导尿管10进入患者的膀胱后，固定外鞘30不动，而继续向前推送磁性导尿管20，使设置有倒钩20的磁性部11伸出外鞘30；当利用倒钩20钩住拖网后，固定外鞘30不动，而将磁性导尿管10向外拉；最后，将磁性导尿管10和外鞘30一同从患者体内抽出。可以想到的是，拖网卡在了磁性导尿管10与外鞘30之间，即便倒钩20因受力过大变形而无法钩住拖网，拖网也无法从磁性导尿管10与外鞘30之间滑出。通过设置外鞘30进一步提高在使用本发明实施例所提供的磁性导尿管拔除输尿管支架管时的成功率。When using the magnetic catheter provided by the embodiment of the present invention to pull out the ureteral stent tube, at first theouter sheath 30 is stuck behind the ellipsoidal head of themagnetic catheter 10, and both are pushed into the patient's urethra; After theurinary catheter 10 enters the patient's bladder, the fixedouter sheath 30 does not move, and continues to push themagnetic catheter 20 forward, so that the magnetic part 11 provided with thebarb 20 stretches out of theouter sheath 30; After trawling, theouter sheath 30 is fixed and themagnetic catheter 10 is pulled outward; finally, themagnetic catheter 10 and theouter sheath 30 are pulled out from the patient's body together. It is conceivable that the trawl net is stuck between themagnetic catheter 10 and theouter sheath 30, even if thebarb 20 cannot hook the trawl net due to excessive force and deformation, the trawl net cannot be separated from themagnetic catheter 10 and theouter sheath 30. slide out between. The success rate when using the magnetic catheter provided by the embodiment of the present invention to remove the ureteral stent is further improved by providing theouter sheath 30 .

本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. magnetic catheter with netting twine capture ability; Said magnetic catheter is provided with magnetic portion near self head place; It is characterized in that the outer surface of said magnetic portion is provided with a plurality of ends and links to each other with said magnetic catheter, the other end is towards the barb of said magnetic catheter afterbody.

2. magnetic catheter according to claim 1 is characterized in that, said magnetic portion is magnetic material or soft magnetic materials.

3. magnetic catheter according to claim 2 is characterized in that, said magnetic portion is magnetic rubber or soft magnetism plastics.

4. magnetic catheter according to claim 2 is characterized in that, the bill of said barb is towards said magnetic catheter surface.

5. magnetic catheter according to claim 3 is characterized in that, said bill is slick and sly bill.

6. magnetic catheter according to claim 4 is characterized in that, a plurality of said barbs are staggered on the surface of said magnetic catheter.

7. according to the described magnetic catheter of claim 1-6, it is characterized in that said magnetic catheter is provided with the diameter of the diameter at barb place less than other positions of magnetic catheter.

8. magnetic catheter according to claim 7 is characterized in that, said magnetic catheter is provided with the oval ball head, and the maximum radius of said oval ball head is greater than the radius of said other cross sections of magnetic catheter.

9. magnetic catheter according to claim 8; It is characterized in that; Also comprise being sheathed on the outside epitheca of said magnetic catheter, the external diameter of said epitheca is less than the maximum gauge of said oval ball head, and the internal diameter of said epitheca is greater than the diameter of said magnetic catheter.

Images