技术领域Technical field
本发明涉及静脉导管技术领域，具体涉及一种具有自动展开件的静脉导管。The present invention relates to the technical field of intravenous catheters, and in particular to an intravenous catheter with an automatic expansion piece.
背景技术Background technique
中心静脉导管是血液净化的血管通路之一。血液净化用中心静脉导管常用双腔导管。在临床上，双腔导管常被用于急诊科、ICU病房、血透室等科室的患者。Central venous catheter is one of the vascular accesses for blood purification. Double-lumen catheters are commonly used as central venous catheters for blood purification. In clinical practice, double-lumen catheters are often used for patients in emergency departments, ICU wards, hemodialysis rooms and other departments.
双腔导管的一端呈尖端状，双腔导管内设有相互独立的输血腔体和采血腔体，输血腔体的尖端设置有输血孔，采血腔体的侧壁开设有采血孔。正常置入静脉的双腔导管应悬浮于血管腔的血流中。只是当患者体位变动或者血管走行变异等情况下，双腔导管容易与血管壁贴合，相应地，采血孔易与血管壁贴附，使采血孔堵塞，造成血流障碍，进而容易引起血栓，无法再进行血液净化治疗。One end of the double-lumen catheter is tip-shaped. The double-lumen catheter is provided with a blood transfusion cavity and a blood collection cavity that are independent of each other. The tip of the blood transfusion cavity is provided with a blood transfusion hole, and the side wall of the blood collection cavity is provided with a blood collection hole. A double-lumen catheter normally inserted into a vein should be suspended in the blood flow of the vascular lumen. However, when the patient's position changes or the course of blood vessels changes, the double-lumen catheter is easy to adhere to the blood vessel wall. Correspondingly, the blood collection hole is easy to adhere to the blood vessel wall, causing the blood collection hole to be blocked, causing blood flow obstruction, and then easily causing thrombosis. Blood purification treatments are no longer possible.
为了解决上述问题，有设计一种双腔导管，在双腔导管的导管主体的外壁上设有球囊，向球囊内注液体或气体使球囊膨胀，进而使双腔导管上的采血孔与血管壁之间保持间隙。In order to solve the above problems, a double-lumen catheter is designed. A balloon is provided on the outer wall of the catheter body of the double-lumen catheter. Liquid or gas is injected into the balloon to expand the balloon, thereby making the blood collection hole on the double-lumen catheter Maintain a gap with the blood vessel wall.
但是，上述带球囊的双腔导管，一方面需要另外设置液体输送管或气体输送管，导致双腔导管的结构复杂，另一方面，在使用时，还需要进行充气或充液的操作，导致双腔导管的操作复杂。However, the above-mentioned double-lumen catheter with a balloon requires an additional liquid delivery tube or gas delivery tube, which results in a complicated structure of the double-lumen catheter. On the other hand, it also needs to be inflated or filled with liquid during use. This results in complicated operation of the double-lumen catheter.
鉴于上述不足，有必要设计一种具有自动展开件的静脉导管。In view of the above shortcomings, it is necessary to design an intravenous catheter with an automatic expansion piece.
发明内容Contents of the invention
因此，本发明要解决的技术问题在于克服现有技术中通过充气或充液使球囊膨胀的双腔导管，使双腔导管的结构复杂、操作复杂，从而提供一种具有自动展开件的静脉导管。Therefore, the technical problem to be solved by the present invention is to overcome the dual-lumen catheters in the prior art that expand the balloon by inflating or filling liquid, which makes the double-lumen catheter complex in structure and operation, thereby providing a venous catheter with an automatic expansion member. catheter.
为解决上述技术问题，本发明的技术方案如下：In order to solve the above technical problems, the technical solutions of the present invention are as follows:
一种具有自动展开件的静脉导管，包括：An intravenous catheter with an automatic expansion piece, including:
导管主体，所述导管主体上设有采血孔；A catheter body, the catheter body is provided with a blood collection hole;
自动展开件，设于所述导管主体上，所述自动展开件包括收缩状态和展开状态，在所述收缩状态，所述自动展开件向所述导管主体靠拢，或，所述自动展开件缩进所述采血孔内，在所述展开状态，所述自动展开件凸出于所述采血孔外，使所述采血孔与静脉血管的管壁之间具有间隙。An automatic expansion member is provided on the catheter main body. The automatic expansion member includes a contracted state and an expanded state. In the contracted state, the automatic expansion member moves closer to the catheter body, or the automatic expansion member shrinks. Entering the blood collection hole, in the unfolded state, the automatic expansion member protrudes out of the blood collection hole, so that there is a gap between the blood collection hole and the wall of the venous blood vessel.
进一步地，所述自动展开件呈网状。Further, the automatic expansion piece is in a mesh shape.
进一步地，所述自动展开件由记忆合金制成。Further, the automatic expansion piece is made of memory alloy.
进一步地，所述自动展开件环绕所述导管主体的外周壁设置。Further, the automatic expansion member is arranged around the outer peripheral wall of the catheter body.
进一步地，所述自动展开件的一端与所述导管主体固定连接，另一端为移动端，所述移动端朝向所述导管主体的远端。Further, one end of the automatic expansion member is fixedly connected to the catheter body, and the other end is a moving end, and the moving end faces the distal end of the catheter body.
进一步地，在所述导管主体的长度方向上，至少部分所述自动展开件对应所述采血孔位置，或，所述自动展开件与所述采血孔错开设置。Further, in the length direction of the catheter body, at least part of the automatic expansion piece corresponds to the position of the blood collection hole, or the automatic expansion piece and the blood collection hole are staggered.
进一步地，所述导管主体包括输血腔体和采血腔体，所述采血孔开设于所述采血腔体的侧壁上。Further, the catheter body includes a blood transfusion cavity and a blood collection cavity, and the blood collection hole is opened on a side wall of the blood collection cavity.
进一步地，所述输血腔体的远端为尖端，所述尖端设有输血孔。Further, the distal end of the blood transfusion cavity is a tip, and the tip is provided with a blood transfusion hole.
进一步地，所述输血腔体内设有输血腔，所述采血腔体内设有采血腔，所述采血腔的截面面积大于所述输血腔的截面面积。Further, a blood transfusion chamber is provided in the blood transfusion chamber, and a blood collection chamber is provided in the blood collection chamber. The cross-sectional area of the blood collection chamber is larger than the cross-sectional area of the blood transfusion chamber.
进一步地，所述输血腔体的近端设有输血接口，所述采血腔体的近端设有采血接口。Further, a blood transfusion interface is provided at the proximal end of the blood transfusion cavity, and a blood collection interface is provided at the proximal end of the blood collection cavity.
本发明技术方案，具有如下优点：The technical solution of the present invention has the following advantages:
1.本发明提供的具有自动展开件的静脉导管，包括导管主体和自动展开件，导管主体上设有采血孔；自动展开件，设于导管主体上，自膨胀主体包括收缩状态和展开状态，在收缩状态，自动展开件向导管主体靠拢，或，自动展开件缩进采血孔内，在展开状态，自动展开件凸出于采血孔外，使采血孔与血管壁之间形成间隙，这样一来，可保证采血孔始终与血管壁之间具有间隙，保证采血顺畅，避免引起血栓和影响血液净化的正常进行，并且，自动展开件可自行展开，无须依靠充入液体或气体实现膨胀，因此无须在静脉导管上设置液体或气体通道，进而可简化静脉导管的结构，并且，在使用过程中，也可省去充入气体或液体的步骤，进而简化了静脉导管的操作。1. The intravenous catheter with an automatic expansion member provided by the present invention includes a catheter main body and an automatic expansion member. The catheter main body is provided with a blood collection hole; the automatic expansion member is provided on the catheter main body. The self-expanding body includes a contracted state and an expanded state. In the contracted state, the automatic expansion piece moves closer to the main body of the catheter, or the automatic expansion piece retracts into the blood collection hole. In the expansion state, the automatic expansion piece protrudes outside the blood collection hole, forming a gap between the blood collection hole and the blood vessel wall. It can ensure that there is always a gap between the blood collection hole and the blood vessel wall to ensure smooth blood collection and avoid causing blood clots and affecting the normal progress of blood purification. Moreover, the automatic expansion piece can expand by itself without relying on the filling of liquid or gas to achieve expansion. Therefore, There is no need to provide a liquid or gas channel on the intravenous catheter, thereby simplifying the structure of the intravenous catheter, and during use, the step of filling the gas or liquid can be omitted, thereby simplifying the operation of the intravenous catheter.
2.本发明提供的具有自动展开件的静脉导管，自动展开件呈网状，这样一来，在保证采血孔与血管壁之间具有间隙、采血孔不会被堵塞的同时，还可使血液透过自动展开件上的孔洞正常流动，不会影响体内血液自远心端向近心端回流，避免自动展开件本身引起的静脉血管堵塞。2. The present invention provides a venous catheter with an automatic expansion piece. The automatic expansion piece is in the shape of a mesh. This ensures that there is a gap between the blood collection hole and the blood vessel wall and that the blood collection hole will not be blocked. At the same time, it can also allow the blood to flow through the catheter. The normal flow through the holes on the automatic expansion piece will not affect the backflow of blood in the body from the distal end to the proximal end, and avoid venous blood vessel blockage caused by the automatic expansion piece itself.
3.本发明提供的具有自动展开件的静脉导管，自动展开件的一端与导管主体固定连接，另一端为移动端，移动端朝向导管主体的远端，这样一来，既方便自动展开件受血管鞘约束时向远端延展进入收缩状态，又方便静脉导管的回收，避免移动端与血管鞘的远端卡滞而导致静脉导管无法回收。3. The present invention provides an intravenous catheter with an automatic expansion member. One end of the automatic expansion member is fixedly connected to the catheter body, and the other end is a moving end. The moving end faces the distal end of the catheter body. In this way, it is convenient for the automatic expansion member to be opened. When the vascular sheath is restrained, it extends to the distal end and enters a contracted state, which facilitates the retrieval of the intravenous catheter and prevents the movable end from getting stuck with the distal end of the vascular sheath, causing the intravenous catheter to be unable to be retrieved.
4.本发明提供的具有自动展开件的静脉导管，自动展开件由记忆合金制成，这样一来，自动展开件可在脱离血管鞘后自动展开。4. The present invention provides an intravenous catheter with an automatic expansion piece. The automatic expansion piece is made of memory alloy. In this way, the automatic expansion piece can automatically expand after being separated from the vascular sheath.
附图说明Description of drawings
为了更清楚地说明本发明具体实施方式或现有技术中的技术方案，下面将对具体实施方式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，下面描述中的附图是本发明的一些实施方式，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 explain the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.
图1为本发明实施例中的具有自动展开件的静脉导管的结构示意图；Figure 1 is a schematic structural diagram of an intravenous catheter with an automatic expansion member in an embodiment of the present invention;
图2为本发明实施例中的具有自动展开件的静脉导管的截面图；Figure 2 is a cross-sectional view of an intravenous catheter with an automatic deployment member in an embodiment of the present invention;
图3为本发明实施例中的具有自动展开件的静脉导管植入静脉血管时使用的穿刺针的结构示意图；Figure 3 is a schematic structural diagram of a puncture needle used when a venous catheter with an automatic expansion piece is implanted into a venous blood vessel in an embodiment of the present invention;
图4为本发明实施例中的具有自动展开件的静脉导管植入静脉血管时使用的导丝的结构示意图；Figure 4 is a schematic structural diagram of a guidewire used when a venous catheter with an automatic expansion piece is implanted into a venous blood vessel in an embodiment of the present invention;
图5为本发明实施例中的具有自动展开件的静脉导管植入静脉血管时使用的扩张子的结构示意图；Figure 5 is a schematic structural diagram of a dilator used when a venous catheter with an automatic expansion piece is implanted into a venous blood vessel in an embodiment of the present invention;
图6为本发明实施例中的具有自动展开件的静脉导管植入静脉血管时使用的血管鞘的结构示意图；Figure 6 is a schematic structural diagram of a vascular sheath used when a venous catheter with an automatic expansion piece is implanted into a venous blood vessel in an embodiment of the present invention;
图7为本发明实施例中的自动展开件在静脉血管上的另一位置的示意图。Figure 7 is a schematic diagram of another position of the automatic expansion member on the venous blood vessel in the embodiment of the present invention.
附图标记说明：Explanation of reference symbols:
1、导管主体；11、输血腔体；111、输血腔；112、输血孔；113、输血接口；12、采血腔体；121、采血腔；122、采血孔；123、采血接口；13、鲁尔帽；2、自动展开件；3、穿刺针；4、导丝；5、扩张子；6、血管鞘；61、鲁尔接头；62、虚线。1. Catheter body; 11. Blood transfusion cavity; 111. Blood transfusion cavity; 112. Blood transfusion hole; 113. Blood transfusion interface; 12. Blood collection cavity; 121. Blood collection cavity; 122. Blood collection hole; 123. Blood collection interface; 13. Lu Er cap; 2. Automatic expansion piece; 3. Puncture needle; 4. Guide wire; 5. Dilator; 6. Vascular sheath; 61. Luer connector; 62. Dotted line.
具体实施方式Detailed ways
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例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 technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”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，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations of the invention. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
此外，下面所描述的本发明不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
如图1至图7，本实施例提供一种具有自动展开件的静脉导管，其与血液净化设备配合使用，静脉导管包括导管主体1以及自动展开件2。As shown in FIGS. 1 to 7 , this embodiment provides an intravenous catheter with an automatic expansion piece, which is used in conjunction with blood purification equipment. The intravenous catheter includes a catheter body 1 and an automatic expansion piece 2 .
导管主体1包括输血腔体11和采血腔体12。输血腔体11内设有输血腔111，采血腔体12内设有采血腔121。采血腔121的截面面积大于输血腔111的截面面积。在本实施例中，输血腔体11和采血腔体12一体成型，方便静脉导管向静脉血管A(如图7所示)内输送。当然，输血腔体11和采血腔体12也可各自独立成型后组装在一起。输血腔体11的远端为尖端，尖端设有输血孔112。采血腔体12的侧壁上开设有采血孔122。在本实施例中，采血孔122有两个，两个采血孔122对称设置，当然，采血孔122的数量也可以为其他数值，在此不做具体限定，根据实际需要设置即可。另外，如图1所示，输血腔体11的近端设有输血接口113，采血腔体12的近端设有采血接口123。在本实施例中，所谓的近端是静脉导管上临近血液净化设备的一端，远端为与近端相对的一端，具体为背向血液净化设备的一端。The catheter body 1 includes a blood transfusion cavity 11 and a blood collection cavity 12 . The blood transfusion chamber 11 is provided with a blood transfusion chamber 111, and the blood collection chamber 12 is provided with a blood collection chamber 121. The cross-sectional area of the blood collection chamber 121 is larger than the cross-sectional area of the blood transfusion chamber 111 . In this embodiment, the blood transfusion chamber 11 and the blood collection chamber 12 are integrally formed to facilitate the transportation of the venous catheter into the venous vessel A (as shown in Figure 7). Of course, the blood transfusion chamber 11 and the blood collection chamber 12 can also be independently formed and then assembled together. The distal end of the blood transfusion cavity 11 is a tip, and a blood transfusion hole 112 is provided at the tip. A blood collection hole 122 is provided on the side wall of the blood collection cavity 12 . In this embodiment, there are two blood collection holes 122 , and the two blood collection holes 122 are arranged symmetrically. Of course, the number of blood collection holes 122 can also be other values, and is not specifically limited here. It can be set according to actual needs. In addition, as shown in FIG. 1 , a blood transfusion interface 113 is provided at the proximal end of the blood transfusion cavity 11 , and a blood collection interface 123 is provided at the proximal end of the blood collection cavity 12 . In this embodiment, the so-called proximal end is the end of the intravenous catheter adjacent to the blood purification device, and the distal end is the end opposite to the proximal end, specifically the end facing away from the blood purification device.
自动展开件2装设于导管主体1上。自动展开件2包括收缩状态和展开状态。在展开状态，自动展开件2凸出于采血孔122外，使采血孔122与静脉血管A的管壁之间具有间隙。在展开状态，如果自动展开件2的尺寸较大的话，自动展开件2将与静脉血管A的管壁接触，如果自动展开件2的尺寸较小的话，自动展开件2则不与静脉血管A的管壁相接触，但无论自动展开件2的尺寸大小，只要自动展开件2处于展开状态，就可保证采血孔122不会静脉血管A的管壁相贴合，并且，由于自动展开件2可自行展开，无须依靠充入液体或气体实现膨胀，因此无须在静脉导管上设置液体或气体通道，进而可简化静脉导管的结构，并且，在使用过程中，也可省去充入气体或液体的步骤，进而简化了静脉导管的操作。The automatic expansion piece 2 is installed on the catheter body 1 . The automatic expansion piece 2 includes a collapsed state and an expanded state. In the unfolded state, the automatic expansion member 2 protrudes outside the blood collection hole 122 so that there is a gap between the blood collection hole 122 and the wall of the venous blood vessel A. In the expanded state, if the size of the automatic expansion piece 2 is larger, the automatic expansion piece 2 will be in contact with the wall of the vein A. If the size of the automatic expansion piece 2 is smaller, the automatic expansion piece 2 will not be in contact with the wall of the vein A. The walls of the blood vessel A are in contact with each other, but regardless of the size of the automatic expansion piece 2, as long as the automatic expansion piece 2 is in the unfolded state, it can be ensured that the blood collection hole 122 will not be in contact with the wall of the vein A, and, because the automatic expansion piece 2 It can be self-expanded and does not need to be filled with liquid or gas to achieve expansion. Therefore, there is no need to set up a liquid or gas channel on the intravenous catheter, which can simplify the structure of the intravenous catheter and eliminate the need to fill with gas or liquid during use. steps, thereby simplifying the operation of intravenous catheters.
在本实施例中，在收缩状态，自动展开件2向导管主体1靠拢。自动展开件2呈网状，这样一来，在保证采血孔122与静脉血管A的管壁之间具有间隙、采血孔122不会被堵塞的同时，还可使血液透过自动展开件2上的孔洞正常流动，不会影响体内血液自远心端向近心端回流，避免自动展开件2本身引起的静脉血管A堵塞。自动展开件2为激光雕刻记忆合金而成网状结构，这样一来，自动展开件2可在脱离血管鞘6后自动展开。自动展开件2呈梭形，一端与导管主体1固定，另一端为移动端，移动端朝向导管主体1的远端，这样一来，既方便自动展开件2受血管鞘6约束时向远端延展处于收缩状态，又方便静脉导管的回收，避免移动端与血管鞘6的远端卡滞而导致静脉导管无法回收。自动展开件2的表面光滑，避免损伤静脉血管A。自动展开件2环绕导管主体1的外周壁设置，可避免因局部设置自动展开件2导致静脉导管进入静脉血管A后发生转动、而使输血接口113和采血接口123与血液净化设备连接不良。在导管主体1长度方向上，部分自动展开件2与采血孔122的位置对应。In this embodiment, in the contracted state, the automatic expansion member 2 moves closer to the catheter body 1 . The automatic expansion member 2 is in the shape of a mesh. In this way, while ensuring that there is a gap between the blood collection hole 122 and the wall of the venous blood vessel A, the blood collection hole 122 will not be blocked, and at the same time, blood can also be allowed to pass through the automatic expansion member 2 The normal flow of the holes will not affect the backflow of blood in the body from the distal end to the proximal end, and avoid clogging of the venous blood vessel A caused by the automatic expansion piece 2 itself. The automatic expansion piece 2 is made of a laser-engraved memory alloy and has a mesh structure. In this way, the automatic expansion piece 2 can automatically expand after being separated from the vascular sheath 6 . The automatic expansion member 2 is fusiform, with one end fixed to the catheter body 1 and the other end being a moving end. The moving end faces the distal end of the catheter body 1. In this way, it is convenient for the automatic expansion member 2 to move toward the distal end when it is constrained by the vascular sheath 6. The extension is in a contracted state, which facilitates the retrieval of the venous catheter and avoids the stagnation of the mobile end and the distal end of the vascular sheath 6 causing the venous catheter to be unable to be retrieved. The surface of the automatic expansion piece 2 is smooth to avoid damaging the vein A. The automatic expansion piece 2 is arranged around the peripheral wall of the catheter body 1, which can prevent the intravenous catheter from rotating after entering the venous vessel A due to the partial placement of the automatic expansion piece 2, resulting in poor connection between the blood transfusion interface 113 and the blood collection interface 123 and the blood purification equipment. In the length direction of the catheter body 1, the partial automatic expansion piece 2 corresponds to the position of the blood collection hole 122.
在其他实施例中，在导管主体1长度方向上，自动展开件2与采血孔122的位置也可错开设置，具体如图7所示。In other embodiments, the positions of the automatic expansion member 2 and the blood collection hole 122 can also be staggered in the length direction of the catheter body 1 , as shown in FIG. 7 .
在其他实施例中，自动展开件2也可仅仅对应采血孔122设置。In other embodiments, the automatic expansion member 2 can also be provided only corresponding to the blood collection hole 122 .
在其他实施例中，在收缩状态，自动展开件2缩进采血孔122内，比如，自动展开件2也可为弹性丝或弹性片，优选地，朝向静脉血管A的管壁的一端光滑，弹性丝或弹性片装设于导管主体1上，在受到约束时，弹性丝或弹性片缩进采血孔122内，在失去约束时，弹性丝或弹性片凸出于采血孔122外。In other embodiments, in the contracted state, the automatic expansion member 2 is retracted into the blood collection hole 122. For example, the automatic expansion member 2 can also be an elastic wire or an elastic sheet. Preferably, one end facing the wall of the venous blood vessel A is smooth. The elastic wire or elastic sheet is installed on the catheter body 1. When constrained, the elastic wire or elastic sheet retracts into the blood collection hole 122. When the constraint is lost, the elastic wire or elastic sheet protrudes out of the blood collection hole 122.
在其他实施例中，静脉导管上还涂布抗凝涂层，使静脉导管具有抗凝血特性。In other embodiments, the intravenous catheter is also coated with an anticoagulant coating to provide the intravenous catheter with anticoagulant properties.
下面介绍本实施例提供的具有自动展开件的静脉导管进入静脉血管A内的操作过程：The following describes the operation process of the intravenous catheter with the automatic expansion piece provided by this embodiment entering the venous blood vessel A:
根据钢丝导引注入法(seldinger技术)，应用穿刺针3穿刺静脉；According to the wire-guided injection method (seldinger technique), the puncture needle 3 is used to puncture the vein;
将导丝4插入穿刺针3内；Insert the guide wire 4 into the puncture needle 3;
退出穿刺针3；Withdraw the puncture needle 3;
扩张子5套在导丝4外，进入静脉血管A，扩张皮肤以及皮下组织；The dilator 5 is placed outside the guide wire 4, enters the vein A, and expands the skin and subcutaneous tissue;
退出扩张子5；Exit dilator 5;
在血管鞘6内插入另一扩张子5，导丝4穿过此扩张子5，通过导丝将血管鞘6插入静脉血管A内，然后退出此扩张子5，血管鞘6的尾端处设置有防止出血的止血薄膜，透过止血薄膜的中央孔插入扩张子5或者静脉导管；在撤除扩张子5或者静脉导管后，止血薄膜可以自动止血；此处的扩张子5包括带通孔且一端呈尖端状的内芯、以及套在内芯外的圆柱形的管；Another dilator 5 is inserted into the vascular sheath 6, the guide wire 4 passes through the dilator 5, the vascular sheath 6 is inserted into the vein A through the guide wire, and then the dilator 5 is withdrawn, and the tail end of the vascular sheath 6 is set There is a hemostatic film to prevent bleeding, and the dilator 5 or the intravenous catheter is inserted through the central hole of the hemostatic film; after the dilator 5 or the intravenous catheter is removed, the hemostatic film can automatically stop bleeding; the dilator 5 here includes a through hole and one end A pointed inner core, and a cylindrical tube placed outside the inner core;
使静脉导管上的自动展开件2处于收缩状态，将静脉导管置入血管鞘6内，血管鞘6约束自动展开件2使其向导管主体1收拢，处于收缩状态；Put the automatic deploying member 2 on the intravenous catheter in a contracted state, place the intravenous catheter into the vascular sheath 6, and the vascular sheath 6 constrains the automatic deploying member 2 to shrink toward the catheter body 1 and in the contracted state;
推动导丝4移动，带动静脉导管移出血管鞘6，进而将静脉导管植入静脉血管A内，此时，自动展开件2脱离血管鞘6的约束，自动展开件2自行向外展开，使采血孔122与静脉血管A的管壁之间保持间隙，这样一来，可保证采血孔122始终与静脉血管A的管壁之间具有间隙，保证采血顺畅，避免引起血栓和影响血液净化的正常进行。Push the guide wire 4 to move, drive the venous catheter out of the vascular sheath 6, and then implant the venous catheter into the venous blood vessel A. At this time, the automatic expansion piece 2 breaks away from the constraints of the vascular sheath 6, and the automatic expansion piece 2 unfolds outward by itself, allowing blood collection There is a gap between the hole 122 and the wall of the venous blood vessel A. This ensures that there is always a gap between the blood collection hole 122 and the wall of the venous blood vessel A, ensuring smooth blood collection and avoiding causing thrombosis and affecting the normal progress of blood purification. .
静脉导管安装完后，对于血管鞘6有两种处理方式，一种是退出血管鞘6，然后从血管鞘6的尾端，沿血管鞘6上的虚线62，向两侧撕开血管鞘6就可使血管鞘6脱离静脉导管，另一种是保留血管鞘6，将静脉导管的鲁尔帽13与血管鞘6尾端的鲁尔接头61配合旋紧，待拔出静脉导管时，旋开鲁尔接头61，将静脉导管回撤到血管鞘6内后，而后将血管鞘6和静脉导管一起拔除。After the intravenous catheter is installed, there are two ways to deal with the vascular sheath 6. One is to withdraw the vascular sheath 6, and then tear the vascular sheath 6 apart from the tail end of the vascular sheath 6 along the dotted line 62 on the vascular sheath 6 to both sides. The vascular sheath 6 can be separated from the intravenous catheter. The other method is to retain the vascular sheath 6, and tighten the Luer cap 13 of the intravenous catheter with the Luer connector 61 at the end of the vascular sheath 6. When the intravenous catheter is pulled out, unscrew it. Luer connector 61, withdraw the intravenous catheter into the vascular sheath 6, and then remove the vascular sheath 6 and the intravenous catheter together.
在将静脉导管植入静脉血管A并且处理好血管鞘6后，将输血接口113接入血液净化设备上的动脉血出口，将采血接口123接入血液净化设备上的静脉血入口。动脉血从血液净化设备的动脉血出口进入输血接口113，沿输血腔111、输血孔112进入静脉血管A，与此同时，静脉血从采血孔122进入采血腔121，并沿着采血腔121、采血接口123、静脉血入口进入血液净化设备，如此循环，使静脉血管A内的静脉血在血液净化设备内得到净化。After the venous catheter is implanted in the venous vessel A and the vascular sheath 6 is processed, the blood transfusion interface 113 is connected to the arterial blood outlet of the blood purification equipment, and the blood collection interface 123 is connected to the venous blood inlet of the blood purification equipment. The arterial blood enters the blood transfusion interface 113 from the arterial blood outlet of the blood purification equipment, and enters the venous blood vessel A along the blood transfusion chamber 111 and the blood transfusion hole 112. At the same time, the venous blood enters the blood collection chamber 121 from the blood collection hole 122, and flows along the blood collection chamber 121, The blood collection interface 123 and the venous blood inlet enter the blood purification equipment, and through such circulation, the venous blood in the venous blood vessel A is purified in the blood purification equipment.
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。Obviously, the above-mentioned embodiments are only examples for clear explanation and are not intended to limit the implementation. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. An exhaustive list of all implementations is neither necessary nor possible. The obvious changes or modifications derived therefrom are still within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499478.9ACN117323480A (en) | 2023-11-10 | 2023-11-10 | Intravenous catheter with automatic deployer |
| PCT/CN2024/130223WO2025098390A1 (en) | 2023-11-10 | 2024-11-06 | Venous catheter having automatically unfolding member |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499478.9ACN117323480A (en) | 2023-11-10 | 2023-11-10 | Intravenous catheter with automatic deployer |
| Publication Number | Publication Date |
|---|---|
| CN117323480Atrue CN117323480A (en) | 2024-01-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311499478.9APendingCN117323480A (en) | 2023-11-10 | 2023-11-10 | Intravenous catheter with automatic deployer |
| Country | Link |
|---|---|
| CN (1) | CN117323480A (en) |
| WO (1) | WO2025098390A1 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025098390A1 (en)* | 2023-11-10 | 2025-05-15 | 首都医科大学附属北京安贞医院 | Venous catheter having automatically unfolding member |
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| WO2025098390A1 (en)* | 2023-11-10 | 2025-05-15 | 首都医科大学附属北京安贞医院 | Venous catheter having automatically unfolding member |
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| WO2025098390A1 (en) | 2025-05-15 |
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