Novel central venous catheter capable of preventing thrombus from falling off

Abstract

The invention belongs to the technical field of central venous catheters, and discloses a novel thrombus falling prevention type central venous catheter which comprises a main catheter body, the right side of the main catheter body is provided with a flow guide channel and a catapult channel, the main catheter body, the flow guide channel and the catapult channel form a Y shape, and the flow guide channel and the main catheter body are arranged on the same straight line; a plurality of flow guide openings are formed in the side wall of the flow guide channel, the inner side of the flow guide channel is connected with liquid outlet valve sleeves matched with the flow guide openings through springs, and the liquid outlet valve sleeves slide along the inner wall of the flow guide channel to open and / or close the flow guide openings; the bolt accumulation channel is connected with a bolt accumulation pipe which is connected with a one-way valve body. The main catheter body, the flow guide channel and the catapulting channel form the Y shape, when the catheter is used for guiding liquid, blood flows out from the flow guide channel through the flow guide opening, thrombus is collected in the catapulting tube through the catapulting channel, and the thrombus is prevented from entering the venous system.

Description

Technical Field

[0001] The present invention relates to the technical field of central venous catheters, in particular to a novel anti-thrombosis central venous catheter. Background Art

[0002] Central venous catheters, a typical example of intravascular catheter technology, are an indispensable part of modern medicine. Placed in a large vein, such as the subclavian, internal jugular, or femoral vein, they effectively measure central venous pressure (CVP). CVP reflects the pressure level in the right atrium or large veins within the thoracic cavity. Monitoring CVP provides a visual understanding of the heart's pumping function, blood volume status, and venous return, thereby guiding physicians in administering fluid therapy or maintaining fluid balance, effectively preventing and treating serious complications such as acute pulmonary edema. Furthermore, CVP monitoring provides an important basis for assessing body fluid levels, helping physicians distinguish between hypovolemia and volume overload, and ultimately developing a scientifically sound fluid replacement plan or diuretic measures to ensure a dynamic balance in the patient's internal environment.

[0003] However, central venous catheters are placed in veins for a long time, causing continuous friction with the blood vessel walls. Coupled with factors such as slowed blood flow and increased blood viscosity, blood clots are very likely to form. Once a blood clot breaks off and enters the venous system with the blood, especially flowing to the lungs, it may cause fatal complications such as pulmonary embolism, directly endangering the patient's life. Currently, the prevention and / or treatment of thrombosis and / or thrombus detachment are mostly carried out through anticoagulant therapy, thrombolytic therapy, etc., but the effect is often limited, and there is a risk of side effects such as bleeding. Summary of the Invention

[0004] The present invention provides a novel thrombus-resistant central venous catheter. The catheter's main body, diversion channel, and thrombus accumulation channel form a "Y" shape. During catheterization, blood flows out of the diversion channel through the diversion port, while thrombi are collected in the thrombus accumulation channel, preventing them from entering the venous system. This approach solves the problems encountered in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A new type of anti-thrombus dislodgement central venous catheter includes a main body, which is provided with a diversion channel and a thrombus accumulation channel. The main body, the diversion channel and the thrombus accumulation channel form a "Y" shape, and the diversion channel and the main body are arranged on the same straight line; the side wall of the diversion channel is provided with a plurality of diversion ports, the inner side of the end face of the diversion channel is connected to a spring, the free end of the spring is connected to a liquid outlet valve sleeve arranged in cooperation with the diversion port, the liquid outlet valve sleeve is slidably arranged on the inner side of the diversion channel, and the liquid outlet valve sleeve slides along the inner wall of the diversion channel to open and / or close the diversion port; the thrombus accumulation channel is detachably connected to an thrombus accumulation tube.

[0006] Furthermore, the guide channel is detachably connected to a base tube, the spring is connected to the inner side of the base tube, the free end of the spring is connected to the liquid outlet valve sleeve via a linkage, and the linkage is slidably penetrated through the end face of the guide channel.

[0007] Furthermore, a rotating member is provided between the guide channel and the base tube. The rotating member is made of a flexible material. Both ends of the rotating member are rotatably connected to the end surface of the guide channel and the end surface of the base tube respectively.

[0008] Furthermore, the outer diameter of the guide channel is smaller than the outer diameter of the main body, the rotating member is rotatably sleeved on the outer side of the guide channel, and the outer diameters of the rotating member, the main body and the base cylinder are the same.

[0009] Furthermore, a guide flow hole is provided on the body of the base cylinder, a plurality of guide vanes are provided on the side of the rotating member close to the base cylinder, a suction assembly is provided on the inner side of the base cylinder, the driving end of the suction assembly is fixedly connected to the linkage member, and the suction port of the suction assembly is connected to the guide flow hole; the suction assembly sucks fluid through the suction port and the guide flow hole to act on the guide vane, causing the rotating member to rotate relative to the base cylinder.

[0010] Furthermore, an annular guide groove is provided at one end of the rotating member close to the base cylinder, and a plurality of the guide plates are arranged obliquely in the guide groove.

[0011] Furthermore, a one-way valve body is detachably connected to the inner side of the thrombus accumulation tube, and the one-way valve body is used to control the thrombus to move in one direction from the thrombus accumulation channel to one side of the thrombus accumulation tube.

[0012] Furthermore, the one-way valve body is conical, with the end close to the accumulation channel being the large end and the end close to the accumulation pipe being the small end.

[0013] Furthermore, the angle between the diversion channel and the accumulation channel is 30° to 60°.

[0014] The principle and beneficial effects of the technical solution are: The present invention provides a novel anti-thrombus dislodgement central venous catheter. The main body, diversion channel, and thrombus accumulation channel are arranged in a Y-shape, forming a "Y-type filter." The diversion channel is located on a straight line extending from the main body, and a diversion hole is provided in the sidewall of the diversion channel. The inner side of the diversion channel is connected to a liquid outlet valve sleeve via a spring. When blood is diverted, blood flows through the diversion channel and impacts the liquid outlet valve sleeve. Under the impact pressure, the liquid outlet valve sleeve compresses the spring, sliding along the axial direction of the diversion channel to open the diversion hole, allowing blood to flow out through the diversion hole. Thrombi within the blood, under the action of their own gravity, partially enter the thrombus accumulation channel and are collected. Some thrombi flow with the blood and impact the liquid outlet valve sleeve. Under the reaction force of the impact momentum, they enter the thrombus accumulation channel. Still others are dispersed during the impact with the liquid outlet valve sleeve, achieving "thrombolysis." In other words, the central venous catheter can effectively prevent and / or reduce the entry of thrombi into the venous system.

[0015] 2. The present invention provides a novel anti-thrombosis central venous catheter, which is connected to the base tube on the outside of the diversion channel, and the spring is arranged on the inside of the base tube. The outlet valve sleeve and the spring are connected by a linkage, which facilitates the disassembly of the spring, so that it can be replaced and / or selected according to actual needs. Springs with different elastic coefficients and / or static lengths can be adapted to different clinical needs; a rotating part is provided between the diversion channel and the base tube, and blood flows out of the diversion port and acts on the rotating part to rotate it. The rotating part rotates relative to the diversion channel and the base tube under the impact of the blood. The rotating part is made of flexible material to prevent its rotation from damaging blood cells such as platelets. The outer diameter of the diversion channel is smaller than that of the main body, and the outer diameters of the rotating part, the main body and the base barrel are the same. By controlling the outer diameters of the three (rotating part, main body and base barrel), the structure of the entire central venous catheter is smoother and rounder, which facilitates the insertion and / or removal of the central venous catheter into the blood vessel, improves the convenience of operation, and reduces the risk of accidental injury to the patient caused by the protruding part of the catheter.

[0016] 3. The present invention provides a novel anti-thrombosis central venous catheter, wherein a guide flow hole is provided in the barrel body of the base barrel, a suction assembly is provided on the inner side of the base barrel, and a driving end of the suction assembly is connected to a linkage part. When blood impacts the liquid discharge valve sleeve and compresses the spring, the driving end of the suction assembly will move with the movement of the linkage part. The movement of the driving end of the suction assembly causes fluid to be generated in its suction port. The fluid acts on the guide plate of the rotating part through the guide flow hole, causing the rotating part to rotate relative to the base barrel, that is, the rotating part rotates not only under the impact of the blood, but also under the impact of the fluid sucked by the suction assembly, thereby stirring the blood flowing out of the guide port, further achieving a "thrombolytic" effect; a guide groove is provided on the end face of the base barrel, and the guide plate is obliquely arranged on the inner side of the guide groove, which effectively increases the area of ​​action of the fluid on the guide plate, accelerates the rotation rate of the rotating part, and improves the "thrombolytic" effect.

[0017] 4. The present invention provides a new type of anti-thrombus-dislodgement central venous catheter, in which a one-way valve body is arranged in the thrombus accumulation tube to control the one-way movement of the thrombus from the thrombus accumulation channel to one side of the thrombus accumulation tube. The one-way valve body is arranged to be conical, and the end close to the thrombus accumulation channel is the large end, and the end close to the thrombus accumulation tube is the small end, so that the thrombus can easily enter the thrombus accumulation tube, but it is difficult to flow out of the thrombus accumulation tube, thereby improving the thrombus collection effect of the thrombus accumulation tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of a novel anti-thrombosis central venous catheter in Example 1 of the present invention; Figure 2 In Example 2 of the present invention, a novel anti-thrombosis central venous catheter is exploded. Figure 1 ; Figure 3 This is a cross-sectional view of a novel anti-thrombosis central venous catheter in Example 3 of the present invention; Figure 4 In Example 3 of the present invention, a novel anti-thrombosis central venous catheter is exploded. Figure 2 ; Figure 5 for Figure 4 Middle AA section view.

[0019] The names of the corresponding symbols in the accompanying drawings are: Main body 1, diversion channel 2, accumulation tether channel 3, diversion port 4, accumulation tether pipe 5, one-way valve body 6, base cylinder 7, linkage part 8, liquid outlet valve sleeve 9, spring 10, suction component 11, rotating part 12, diversion flow hole 13. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Example 1

[0021] like Figure 1 As shown, a new type of anti-thrombosis central venous catheter includes a main body 1, a diversion channel 2 and a thrombus accumulation channel 3 are provided on the right side of the main body 1, the main body 1, the diversion channel 2 and the thrombus accumulation channel 3 form a "Y" shape, the outer diameter of the diversion channel 2 is smaller than the outer diameter of the main body 1, and the diversion channel 2 and the main body 1 are arranged on the same straight line, the thrombus accumulation channel 3 is inclined downward, and the angle between the diversion channel 2 and the thrombus accumulation channel 3 is 60°; a plurality of diversion ports 4 are opened on the side wall of the diversion channel 2, and a spring is connected to the inner side of the right end face of the diversion channel 2. Spring 10, the left end of the spring 10 is connected to a liquid outlet valve sleeve 9 which is arranged in cooperation with the guide port 4, the liquid outlet valve sleeve 9 is slidably arranged on the inner side of the guide channel 2, and the liquid outlet valve sleeve 9 slides along the inner wall of the guide channel 2 to open and / or close the guide port 4; the accumulation channel 3 is connected to the accumulation tube 5 through a threaded connection, and the inner side of the accumulation tube 5 is clamped with a one-way valve body 6, the one-way valve body 6 is conical, and the end close to the accumulation channel 3 is the large end, and the end close to the accumulation tube 5 is the small end. The one-way valve body 6 is used to control the thrombus to move in one direction from the accumulation channel 3 to the side of the accumulation tube 5.

[0022] The specific implementation process is as follows: When the central venous catheter is used to divert blood, the blood impacts the liquid outlet valve sleeve 9 through the diversion channel 2. The liquid outlet valve sleeve 9 compresses the spring 10 under the impact pressure and slides along the axial direction of the diversion channel 2 to open the diversion hole, and the blood flows out through the diversion hole; part of the thrombus in the blood enters the accumulation tube 5 through the accumulation channel 3 under the action of its own gravity and is collected, part of the thrombus flows with the blood and impacts the liquid outlet valve sleeve 9, and enters the accumulation channel 3 under the reaction force of the impact momentum, and another part is dispersed in the process of impacting the liquid outlet valve sleeve 9, thereby achieving "thrombolysis" to prevent and / or reduce the entry of thrombus into the venous system.

[0023] Example 2

[0024] like Figure 2 As shown, a novel anti-thrombosis central venous catheter includes a main body 1, a diversion channel 2 and a thrombus accumulation channel 3 are provided on the right side of the main body 1, the main body 1, the diversion channel 2 and the thrombus accumulation channel 3 form a "Y" shape, the outer diameter of the diversion channel 2 is smaller than the outer diameter of the main body 1, and the diversion channel 2 and the main body 1 are arranged on the same straight line, the thrombus accumulation channel 3 is inclined downward, and the angle between the diversion channel 2 and the thrombus accumulation channel 3 is 60°; a plurality of diversion ports 4 are opened on the side wall of the diversion channel 2, the right end of the diversion channel 2 is connected to a base tube 7 and a spring 10, the left end of the spring 10 is connected to a liquid outlet valve sleeve 9 arranged in cooperation with the diversion port 4, the liquid outlet valve sleeve 9 is slidably provided on the inner side of the diversion channel 2, and the liquid outlet valve sleeve 9 slides along the inner wall of the diversion channel 2 to open and / or close the diversion port 4; A rotating member 12 made of a flexible material is provided between the guide channel 2 and the base tube 7. In this embodiment, the rotating member 12 is made of medical rubber. The two ends of the rotating member 12 are rotatably connected to the end surface of the guide channel 2 and the end surface of the base tube 7 respectively. The rotating member 12 is rotatably sleeved on the outside of the guide channel 2, and the outer diameters of the rotating member 12, the main body 1 and the base tube 7 are the same. The accumulation channel 3 is connected to the accumulation tube 5 through a threaded connection, and a one-way valve body 6 is clamped on the inner side of the accumulation tube 5. The one-way valve body 6 is conical, and the end close to the accumulation channel 3 is the large end, and the end close to the accumulation tube 5 is the small end. The one-way valve body 6 is used to control the thrombus to move in one direction from the accumulation channel 3 to the side of the accumulation tube 5.

[0025] The specific implementation process is as follows: Before using this central venous catheter, the spring 10 of different elastic coefficients (related to the patient's blood pressure and thrombosis status) and / or static lengths (related to the flow rate of the diverted blood) are replaced and / or selected according to clinical needs. The thrombus tube 5 and the one-way valve body 6 are then connected and used for blood diversion. During the blood diversion process, blood flows through the diversion channel 2 and impacts the outlet valve sleeve 9. Under the impact pressure, the outlet valve sleeve 9 compresses the spring 10, sliding along the axial direction of the diversion channel 2 to open the diversion hole, allowing blood to flow out through the diversion hole. After flowing out of the diversion port 4, the blood acts on the rotating member 12, causing it to rotate. Under the impact of the blood, the rotating member 12 rotates relative to the diversion channel 2 and the base tube 7, stirring the outflowing blood. Some of the thrombi in the blood, under the action of their own weight, enter the thrombus tube 5 through the thrombus channel 3 and are collected. Some of the thrombi flow with the blood and impact the outlet valve sleeve 9. Under the reaction force of the impact momentum, they enter the thrombus channel 3. Another part of the thrombi are dispersed during the impact of the outlet valve sleeve 9.

[0026] Example 3

[0027] like Figures 3 to 5As shown, a new type of anti-thrombosis central venous catheter includes a main body 1, a diversion channel 2 and a thrombus accumulation channel 3 are provided on the right side of the main body 1, the main body 1, the diversion channel 2 and the thrombus accumulation channel 3 form a "Y" shape, the outer diameter of the diversion channel 2 is smaller than the outer diameter of the main body 1, and the diversion channel 2 and the main body 1 are arranged on the same straight line, the thrombus accumulation channel 3 is inclined downward, and the angle between the diversion channel 2 and the thrombus accumulation channel 3 is 60°; a plurality of diversion ports 4 are opened on the side wall of the diversion channel 2, the right end of the diversion channel 2 is connected to a base tube 7, and the base tube 7 has a A spring 10 and a suction assembly 11 are connected to the inside. The left end face of the spring 10 is fixedly connected to a linkage member 8. The linkage member 8 is slidably arranged at the right end of the guide channel 2. The linkage member 8 is connected to a liquid outlet valve sleeve 9 provided in cooperation with the guide port 4. The liquid outlet valve sleeve 9 is slidably arranged on the inner side of the guide channel 2. The liquid outlet valve sleeve 9 slides along the inner wall of the guide channel 2 to open and / or close the guide port 4; a guide flow hole 13 is opened on the cylinder body of the base cylinder 7, and the driving end of the suction assembly 11 is fixedly connected to the linkage member 8, and the suction port of the suction assembly 11 is connected to the guide flow hole 13; A rotating member 12 made of a flexible material is further provided between the guide channel 2 and the base cylinder 7. In this embodiment, the rotating member 12 is made of medical rubber, and the two ends of the rotating member 12 are rotatably connected to the end face of the guide channel 2 and the end face of the base cylinder 7 respectively; the rotating member 12 is rotatably sleeved on the outside of the guide channel 2, and the outer diameters of the rotating member 12, the main body 1 and the base cylinder 7 are the same; an annular guide groove is provided at one end of the rotating member 12 close to the base cylinder 7, and a plurality of guide vanes are evenly provided on the inner side of the guide groove, and the plurality of guide vanes are arranged obliquely in the guide groove; The accumulation channel 3 is connected to the accumulation tube 5 through a threaded connection, and a one-way valve body 6 is clamped on the inner side of the accumulation tube 5. The one-way valve body 6 is conical, and the end close to the accumulation channel 3 is the large end, and the end close to the accumulation tube 5 is the small end. The one-way valve body 6 is used to control the thrombus to move in one direction from the accumulation channel 3 to the side of the accumulation tube 5.

[0028] The specific implementation process is as follows: Before using this central venous catheter, first replace and / or select a spring 10 with a different elastic coefficient (related to the patient's blood pressure and thrombosis condition) and / or static length (related to the flow rate of the diverted blood) according to clinical needs, and connect the accumulation tube 5 and the one-way valve body 6 for blood diversion. In the process of diverting blood, the blood impacts the liquid outlet valve sleeve 9 through the diversion channel 2. Under the impact pressure, the liquid outlet valve sleeve 9 compresses the spring 10 and slides along the axial direction of the diversion channel 2 to open the diversion hole. The blood flows out through the diversion hole. After the blood flows out from the diversion port 4, it acts on the rotating part 12 to rotate it. The rotating part 12 rotates relative to the diversion channel 2 and the base tube 7 under the impact of the blood, stirring the outflowing blood. Part of the thrombus in the blood enters the accumulation tube 5 through the accumulation channel 3 under the action of its own gravity and is collected, and part of the thrombus is collected along with the The blood flows and impacts the liquid outlet valve sleeve 9, and enters the thrombus accumulation channel 3 under the reaction force of the impact momentum. A part of the blood is dispersed in the process of impacting the liquid outlet valve sleeve 9; and the liquid outlet valve sleeve 9 will drive the linkage part 8 to move in the process of compressing the spring 10, so that it compresses the driving end of the suction component 11, and the suction port produces fluid. The fluid acts on the guide plate of the rotating part 12 through the guide hole 13, so that the rotating part 12 rotates relative to the base cylinder 7, and stirs the blood flowing out of the guide port 4, thereby achieving a "thrombolytic" effect, preventing and / or reducing thrombus from entering the venous system.

[0029] The above is only an embodiment of the present invention, and common knowledge such as the specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A novel anti-thrombotic central venous catheter, characterized in that: It includes a main body, the main body is provided with a guide channel and an accumulation channel, the main body, the guide channel and the accumulation channel form a "Y" shape, and the guide channel and the main body are arranged on the same straight line; the side wall of the guide channel is provided with a plurality of guide ports, the inner side of the end face of the guide channel is connected with a spring, the free end of the spring is connected with a liquid outlet valve sleeve arranged in cooperation with the guide port, the liquid outlet valve sleeve is slidably arranged on the inner side of the guide channel, and the liquid outlet valve sleeve slides along the inner wall of the guide channel to open and / or close the guide port; the accumulation channel is detachably connected with an accumulation tube.

2. A novel anti-thrombus dislodgment type central venous catheter according to claim 1, characterized in that: The guide channel is detachably connected to a base cylinder, the spring is connected to the inner side of the base cylinder, the free end of the spring is connected to the liquid outlet valve sleeve via a linkage, and the linkage is slidably penetrated through the end surface of the guide channel.

3. A novel anti-thrombus dislodgment type central venous catheter according to claim 2, characterized in that: A rotating member is also provided between the guide channel and the base tube. The rotating member is made of a flexible material. Two ends of the rotating member are rotatably connected to the end surface of the guide channel and the end surface of the base tube respectively.

4. A novel anti-thrombus dislodgment type central venous catheter according to claim 3, characterized in that: The outer diameter of the flow guide channel is smaller than the outer diameter of the main pipe body, the rotating member is rotatably sleeved on the outer side of the flow guide channel, and the outer diameters of the rotating member, the main pipe body and the base cylinder are the same.

5. The novel anti-thrombus dislodgment type central venous catheter according to claim 3 is characterized in that: The body of the base cylinder is provided with a guide flow hole, a side of the rotating member close to the base cylinder is provided with a plurality of guide vanes, the inner side of the base cylinder is provided with a suction assembly, the driving end of the suction assembly is fixedly connected to the linkage member, and the suction port of the suction assembly is connected to the guide flow hole; the suction assembly sucks fluid through the suction port and the guide flow hole to act on the guide vane, so that the rotating member rotates relative to the base cylinder.

6. A novel anti-thrombus dislodgment type central venous catheter according to claim 5, characterized in that: An annular guide groove is arranged at one end of the rotating member close to the base cylinder, and a plurality of guide plates are arranged obliquely in the guide groove.

7. The novel anti-thrombus dislodgment type central venous catheter according to claim 1, characterized in that: A one-way valve body is detachably connected to the inner side of the thrombus accumulation tube, and the one-way valve body is used to control the thrombus to move in one direction from the thrombus accumulation channel to one side of the thrombus accumulation tube.

8. The novel anti-thrombus dislodgment type central venous catheter according to claim 7, characterized in that: The one-way valve body is conical, with the end close to the accumulation and tethering passage being the large end and the end close to the accumulation and tethering pipe being the small end.

9. The novel anti-thrombus dislodgment type central venous catheter according to claim 1, characterized in that: The angle between the guide channel and the accumulation channel is 30°~60°.

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