Three-way valve for flushing double-channel guide pipe

Abstract

The utility model provides a three-way valve for flushing a double-channel conduit, and belongs to the technical field of three-way valves. Comprising a three-way valve main body, the injector connector is stably connected to the three-way valve body, the two external thread Luer tapers are used for being externally connected with two pipe cavities of the double-cavity central venous catheter, and external threads of the external thread Luer tapers are matched with the connecting portion of the two pipe cavities of the double-cavity central venous catheter. Due to the design of the two external thread Luer tapers on the three-way valve main body, simultaneous connection of double-cavity central venous catheter cavities is realized; through cooperation of structures such as a rotating block, a control block, a sliding block, a limiting groove, a connecting rod, a finger ring and a spring, the purpose that a three-way valve is conveniently operated by one hand to wash and seal a pipe is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of three -way valves, especially a three -way valve for double -channel catheter flushing. BACKGROUND

[0002] In the field of clinical medicine, the flushing and sealing operation of central venous catheters is a key link to ensure the normal use of catheters and patient safety; according to the recommended opinion 17 of the "Central Venous Catheter Flushing and Sealing Expert Consensus" published in the April 2022 issue of the 31st volume of the Chinese Journal of Emergency Medicine, for double -lumen or multi -lumen catheters, each lumen needs to be flushed and sealed, and single -hand operation is required; this operation specification aims to maintain the patency of the catheter and prevent adverse events such as blood reflux.

[0003] However, in actual clinical operation, single -hand flushing and sealing are difficult for nurses who have not yet mastered the operation skill, on the one hand, the complexity of the operation easily leads to uneven stress, affecting the flushing and sealing effect; on the other hand, improper operation may cause syringe to fall and other accidents, not only wasting medical resources, but also possibly causing potential harm to patients; at the same time, the three -way tube commonly used in hospitals is a double -threaded luer connector, which can realize the simultaneous infusion of multiple drugs, but cannot be connected with the lumen of the double -lumen central venous catheter at the same time, which undoubtedly increases the difficulty and complexity of the operation of nurses, and is not conducive to improving work efficiency and ensuring the standardization of operation. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a three -way valve for double -channel catheter flushing, to solve the technical problems that the existing three -way valve cannot simultaneously connect the lumen of the double -lumen central venous catheter and that single -hand operation of the three -way valve is inconvenient.

[0005] Technical scheme: in order to achieve the above purpose, the utility model realizes the following technical scheme: a three -way valve for double -channel catheter flushing, comprising: a three -way valve body, a three -way channel is arranged in the three -way valve body; a syringe interface and two external thread luer connectors stably connected to the three -way valve body, wherein: the two external thread luer connectors are used for external connection of the two lumens of the double -lumen central venous catheter, the external thread of the external thread luer connector is matched with the connection part of the two lumens of the double -lumen central venous catheter, and the two external thread luer connectors are communicated with the three -way channel; the syringe interface is used for external connection of the syringe, the syringe interface is matched with the syringe injection port, and the syringe interface is communicated with the three -way channel, wherein the specific shape of the three -way channel can be cylindrical, the channel diameter is 5mm, the pitch of the external thread luer connector is 1mm, the tooth type is triangular, the thread outer diameter is 8mm, the connection with the double -lumen central venous catheter is ensured to be tight and meet the medical standard, the syringe interface needs to meet the international standard specification of medical syringe, and the interface inner diameter is 6mm, which can be tightly connected with the common syringe.

[0006] Preferably, the rotating block is rotatably connected in the three-way valve body, and the rotating block is used to open and close the three-way channel; the three-way port is arranged in the rotating block, and the three-way port is matched with the three-way channel, and the three-way port is used to communicate the three-way channel, wherein the material of the rotating block is medical-grade polycarbonate, which has good corrosion resistance and mechanical strength; the rotating block can be cylindrical, with a diameter of 5 mm and a height of 3 mm, the three-way port is circular with a diameter of 4 mm, and the three-way port is tightly connected with the three-way channel to ensure smooth liquid flow.

[0007] Preferably, the sliding groove is arranged in the three-way valve body, and the sliding groove does not interfere with the three-way port; the control block is rotatably and slidably connected in the sliding groove, the control block is matched with the sliding groove, and the control block is used to control the rotation of the rotating block, wherein the control block is cylindrical with a diameter of 3.5 mm and a height of 2.5 mm, the material of the control block is medical-grade stainless steel, which has good corrosion resistance and mechanical strength; the sliding groove is a cylindrical groove with a diameter of 3.6 mm and a depth of 2.8 mm, which ensures that the control block can smoothly rotate and slide in the sliding groove.

[0008] Preferably, the limiting grooves are arranged in the sliding groove, and the limiting grooves are inclined; the sliding blocks are arranged on the control block, and the sliding blocks correspond to the limiting grooves, the sliding blocks are matched with the limiting grooves, and the sliding blocks are slidably connected with the limiting grooves, wherein the angle of the limiting groove is 45 degrees, the depth of the limiting groove is 1 mm, and the width of the limiting groove is 1.5 mm; the sliding block can be a circular ring with a length of 1.2 mm, a diameter of 1 mm, and a height of 0.8 mm; the material of the sliding block is medical-grade polycarbonate, which has good wear resistance and mechanical strength.

[0009] Preferably, the connecting rod is stably connected to one end of the control block and penetrates the three-way valve on the other end, and the connecting rod is located on the side of the control block away from the three-way port; the ring is stably connected to the other end of the connecting rod, and the ring is used to control the movement of the connecting rod towards the rotating block, wherein the material of the connecting rod is medical-grade stainless steel with a diameter of 1 mm and a length of 5 mm; the connecting rod is welded to the control block and the ring to ensure firm and reliable connection; the ring is circular with an inner diameter of 15 mm and a thickness of 2 mm; the material of the ring is medical-grade polycarbonate, which has good flexibility and comfort.

[0010] Preferably, the limiting rod is stably connected to the finger ring, the limiting rod is located on the side of the finger ring close to the three-way valve body, the limiting rod is used for limiting the moving track of the finger ring, and the limiting rod has a length greater than the opening height of the limiting groove, wherein the limiting rod is made of medical-grade stainless steel, has a diameter of 1 mm and a length of 8 mm; the limiting rod is connected to the finger ring in a welding manner, so that the connection is firm and reliable; the limiting rod is located on the side of the finger ring close to the three-way valve body and is perpendicular to the finger ring, so that the moving track of the finger ring can be effectively limited.

[0011] Preferably, the spring is located outside the connecting rod, one end of the spring is stably connected to the three-way valve body, the other end of the spring is stably connected to the control block, the spring is used for resetting the control block, and the spring is in a stretched state when the three-way port is in communication with the three-way channel, wherein the spring is made of medical-grade stainless steel, has a spring wire diameter of 0.5 mm, an outer diameter of 3 mm and a length of 10 mm; the spring has an elastic coefficient of 10 N / mm, so that sufficient reset force can be provided.

[0012] Compared with the prior art, the application has the following technical effects:

[0013] 1. The two external thread luer connectors on the three-way valve body are designed to simultaneously connect the two lumens of the double-lumen central venous catheter, the external threads are matched with the two lumen connection parts of the double-lumen central venous catheter, the three-way valve can be connected to the double-lumen central venous catheter, the flushing and sealing operations are facilitated, the operation steps and time are reduced, and the medical efficiency is improved.

[0014] 2. When a nurse inserts a finger into the finger ring and presses it, the connecting rod is driven to move downward to control the control block to move downward, the three-way port on the rotating block is in communication with the channel on the three-way valve body, the spring is gradually stretched during the downward movement of the control block, the spring automatically drives the control block to move upward when the flushing and sealing operations are completed, the three-way port is dislocated from the channel in the three-way valve body, the three-way valve is closed, one-hand operation of the three-way valve for flushing and sealing is achieved, the operation difficulty is reduced, and the uneven force and the falling of the syringe are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present application or prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or prior art. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is a structural schematic diagram of the present application.

[0017] Figure 2 It is Figure 1 a main sectional structural schematic diagram.

[0018] Figure 3 It is a structural schematic diagram of the rotating block.

[0019] Figure 4 It is a structural schematic diagram of the limiting groove.

[0020] Figure 5 It is a structural schematic diagram of the control block.

[0021] Figure 6 It is Figure 2 an enlarged schematic diagram of A.

[0022] The reference signs: 1 - three-way valve main body; 2 - syringe interface; 3 - external thread luer connector; 4 - rotating block; 401 - three-way port; 402 - sliding groove; 4021 - limiting groove; 5 - control block; 501 - sliding block; 6 - connecting rod; 7 - finger ring; 701 - limiting rod; 8 - spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the present application are described clearly and completely. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Embodiment:

[0025] The present application provides a three-way valve for double-channel catheter flushing, which solves the technical problems that the existing three-way valve cannot simultaneously connect the double-lumen central venous catheter lumen and one-handedly operate the three-way valve. In actual use, the three-way valve is realized to simultaneously connect the double-lumen central venous catheter lumen and one-handedly operate the three-way valve for flushing and sealing.

[0026] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings in the specification and specific embodiments.

[0027] As Figures 1 to 6 shown, the application provides a three-way valve for double-lumen catheter flushing, comprising: a three-way valve body 1, a three-way channel is arranged in the three-way valve body 1; a syringe interface 2 and two external thread luer connectors 3 stably connected to the three-way valve body 1, wherein: the two external thread luer connectors 3 are used for connecting two lumens of a double-lumen central venous catheter, the external threads of the external thread luer connectors 3 are matched with the connection parts of the two lumens of the double-lumen central venous catheter, and the two external thread luer connectors 3 are in communication with the three-way channel; the syringe interface 2 is used for connecting a syringe, the syringe interface 2 is matched with a syringe injection port, and the syringe interface 2 is in communication with the three-way channel.

[0028] Through the cooperation of the three-way valve body 1, the syringe interface 2 and the two external thread luer connectors 3, the external thread luer connectors 3 are matched and connected with the double-lumen central venous catheter, the syringe interface 2 is matched and connected with the syringe, and the two external thread luer connectors 3 and the syringe interface 2 are in communication with the three-way channel, so that the double-lumen central venous catheter and the syringe can be connected externally, and the effect of providing a channel connection for flushing and sealing operations is achieved.

[0029] Referring to Figures 2 to 4 , the application further comprises a rotating block 4 rotatably connected in the three-way valve body 1, the rotating block 4 is used for opening and closing the three-way channel; a three-way port 401 is arranged in the rotating block 4, the three-way port 401 is matched with the three-way channel, and the three-way port 401 is used for communicating the three-way channel. Through the rotatable connection of the rotating block 4 in the three-way valve body 1 and the matching of the three-way port 401 on the rotating block 4 with the three-way channel, the effect of opening and closing the three-way channel by rotating the rotating block 4 is achieved, so as to facilitate the control of liquid circulation.

[0030] Referring to Figure 4 , the application further comprises a sliding groove 402 arranged in the three-way valve body 1, the sliding groove 402 does not interfere with the three-way port 401; a control block 5 is rotatably and slidingly connected in the sliding groove 402, the control block 5 is matched with the sliding groove 402, and the control block 5 is used for controlling the rotation of the rotating block 4. Through the cooperation of the arrangement of the sliding groove 402 in the three-way valve body 1 and the rotatable and sliding connection of the control block 5 in the sliding groove 402, the stable movement of the control block 5 in the sliding groove 402 is achieved, so as to achieve the effect of controlling the rotation of the rotating block 4.

[0031] Referring to Figure 4The application also comprises a plurality of limiting grooves 4021, which are arranged in the sliding groove 402 and are inclined; a plurality of sliding blocks 501, which are stably connected to the control block 5, correspond to the plurality of limiting grooves 4021, and are adapted to the limiting grooves 4021 and are in sliding connection with the limiting grooves 4021. The plurality of limiting grooves 4021 arranged in the sliding groove 402 and being inclined, and the plurality of sliding blocks 501 stably connected to the control block 5 and in sliding connection with the limiting grooves 4021, can guide the control block 5 to move in a specific direction when the control block 5 moves, and further control the rotating block 4 to rotate.

[0032] Referring to Figure 5 and Figure 6 The application also comprises a connecting rod 6, one end of which is stably connected to the control block 5, and the other end of which penetrates the three-way valve, and the connecting rod 6 is located on the side of the control block 5 away from the three-way port 401; a ring 7, which is stably connected to the other end of the connecting rod 6, and is used to control the connecting rod 6 to move towards the rotating block 4. The connecting rod 6 is connected to the control block 5 at one end, penetrates the three-way valve at the other end, and is connected to the ring 7, which can control the connecting rod 6 to move by operating the ring 7, thereby controlling the movement of the control block 5, and makes it possible to operate with one hand.

[0033] Referring to Figure 3 and Figure 4 The application also comprises a limiting rod 701, which is stably connected to the ring 7, and is located on the side of the ring 7 close to the three-way valve body 1, and is used to limit the movement track of the ring 7, and the length of the limiting rod 701 is greater than the opening height of the limiting groove 4021. The limiting rod 701 is stably connected to the ring 7 and located on the side close to the three-way valve body 1, and the length of the limiting rod 701 is greater than the opening height of the limiting groove 4021, which can limit the movement track of the ring 7, prevent over-operation, and ensure the accuracy and safety of operation.

[0034] Referring to Figure 6 The application also comprises a spring 8, which is located around the connecting rod 6, one end of which is stably connected to the three-way valve body 1, and the other end of which is stably connected to the control block 5, and is used to reset the control block 5. When the three-way port 401 is in communication with the three-way passage, the spring 8 is in a stretched state. The spring 8 is located around the connecting rod 6 and connected to the three-way valve body 1 and the control block 5 at both ends, which can make the spring 8 in a stretched state when the three-way port 401 is in communication with the three-way passage, and the spring 8 can automatically pull the control block 5 to reset and close the three-way passage after the pipe is flushed and sealed.

[0035] The working principle of the present application: in the use process, first, connect the syringe to the syringe interface 2, and connect the two outer threaded luer connectors 3 of the three-way valve body 1 with the two lumens of the double-lumen central venous catheter; then the nurse inserts his fingers into the finger ring 7 and presses it, which drives the connecting rod 6 to move downward, so that the control block 5 moves downward in the sliding groove 402; since the sliding block 501 on the control block 5 is in the inclined limiting groove 4021 in the sliding groove 402, the control block 5 will drive the rotating block 4 to rotate when it moves downward, so that the three-way port 401 on the rotating block 4 is in communication with the three-way channel in the three-way valve body 1, at this time the spring 8 is in a stretched state; after the flushing pipe and the sealing pipe operation are completed, release the finger ring 7, the spring 8 automatically pulls the control block 5 to move upward, so that the three-way port 401 is dislocated with the three-way channel, and the three-way valve is closed; during the operation, the limiting rod 701 on the finger ring 7 limits the movement trajectory of the finger ring 7, ensuring the accuracy and safety of the operation.

[0036] The syringe and the double-lumen central venous catheter required in the above description are all prior art and are not necessary technical features in the present application, so they are not described and drawn in the documents and drawings of the present application; the figures shown in the drawings are example figures, and the purpose is only to more intuitively show the key structure and connection relationship of the three-way valve for flushing the double-channel catheter; in actual application, the appearance and size of the device can be adjusted and optimized according to specific needs.

[0037] The present application covers any alternative, modification, equivalent method and scheme made on the essence and scope of the present application. In order to enable the public to have a thorough understanding of the present application, the specific details are described in detail in the above preferred embodiments of the present application, and the present application can also be completely understood without the description of these details for those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0038] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, some improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A three-way valve for flushing a double-lumen catheter, characterized by The utility model relates to a three -way valve, including: Three -way valve body (1), be equipped with three -way channel in three -way valve body (1); Stable connection in three -way valve body (1) on syringe interface (2) and two outer thread luer connectors (3), wherein: Two outer thread luer connectors (3) are used for the outer connection of the two lumen of double -lumen central venous catheter, and the outer thread of outer thread luer connector (3) is adapted to the connection part of the two lumen of double -lumen central venous catheter, and two outer thread luer connectors (3) are communicated with three -way channel; Syringe interface (2) is used for the outer connection of syringe, and syringe interface (2) is adapted to syringe injection port, and syringe interface (2) is communicated with three -way channel.

2. A three-way valve for flushing a double-lumen catheter according to claim 1, characterized in that Further including: Rotary block (4) is rotatably connected in three -way valve body (1), and rotary block (4) is used to open and close three -way channel; Three -way mouth (401) is set up in rotary block (4), and three -way mouth (401) is adapted to three -way channel, and three -way mouth (401) is used to communicate three -way channel.

3. A three-way valve for flushing a double-lumen catheter according to claim 2, characterized in that Further including: Chute (402) is set up in three -way valve body (1), and chute (402) is not interfered with three -way mouth (401); Control block (5) is rotatably and slidably connected in chute (402), and control block (5) is adapted to chute (402), and control block (5) is used to control rotary block (4) rotation.

4. A three-way valve for flushing a double-lumen catheter according to claim 3, characterized in that Further including: Limiting groove (4021) is equipped with multiple, and multiple limiting groove (4021) is set up in chute (402), and limiting groove (4021) is inclined; Slide block (501) is equipped with multiple, and multiple slide block (501) is stably connected on control block (5), and multiple slide block (501) corresponds with multiple limiting groove (4021), and slide block (501) is adapted to limiting groove (4021), and slide block (501) is slidably connected with limiting groove (4021).

5. A three-way valve for flushing a double-lumen catheter according to claim 3, characterized in that Further including: Connecting rod (6) is stably connected on control block (5) one end, and the other end penetrates three -way valve, and connecting rod (6) is on the side of control block (5) away from three -way mouth (401); Ring (7) is stably connected on the other end of connecting rod (6), and ring (7) is used to control connecting rod (6) to rotary block (4) direction movement.

6. A three-way valve for flushing a double-lumen catheter according to claim 5, characterized in that Further including: Limiting rod (701) is stably connected on ring (7), and limiting rod (701) is on the side of ring (7) close to three -way valve body (1), and limiting rod (701) is used for ring (7) movement trajectory definition, and limiting rod (701) length is greater than limiting groove (4021) set up height.

7. A three-way valve for flushing a dual-lumen catheter according to claim 5, wherein Further including: Spring (8) is on the periphery of connecting rod (6), and one end of spring (8) is stably connected with three -way valve body (1), and the other end is stably connected with control block (5), and spring (8) is used for control block (5) reset, and when three -way mouth (401) is communicated with three -way channel, spring (8) is in the state of stretching.

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