Deep venous catheter
By designing a deep vein catheter with a multi-port port and a switching valve assembly, the opening and closing of the fluid channel is automatically controlled, eliminating the risk of air entering the blood vessel, simplifying the operation process, and improving the efficiency of aspiration.
Patent Information
- Application Number
- CN202422966888.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-03
AI Technical Summary
During the use of deep vein catheters, the risk of air entering the blood vessels is difficult to completely avoid. Existing techniques, such as aspiration, increase the workload of medical staff and have limited effectiveness.
A deep vein catheter was designed, which adopts a structure of multi-port tube seat, branch tube, connector and switch valve assembly. The first sealing assembly automatically controls the opening and closing of the fluid channel to prevent air from entering the blood vessel, and the second sealing assembly optimizes the aspiration process.
It effectively prevents air from entering blood vessels, reduces operational complexity, lowers the workload of medical staff, and improves aspiration efficiency.
Smart Images
Figure CN223716179U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, concretely is a kind of deep vein catheter. BACKGROUND
[0002] In the medical field, deep vein catheter is a commonly used medical instrument, and is widely used in infusion, blood sampling and drug injection and other treatment processes. The use of deep vein catheter, especially in intensive care and long-term treatment, can effectively improve the treatment efficiency and patient comfort. However, during the placement and use of deep vein catheter, the risk of air entering the blood vessel always exists, which may cause serious complications such as air embolism, endangering the life of the patient.
[0003] Traditionally, in order to prevent air from entering the blood vessel, various techniques and methods are used. For example, during the catheter placement process, air in the catheter is removed by backflow. Although this method can reduce the risk of air entering to some extent, it still has some significant shortcomings. First, the backflow operation increases the workload of medical personnel, especially in emergency situations, improper operation is prone to occur. Second, the backflow operation itself cannot completely ensure that all air is removed, especially in the case of unstable catheter position or patient movement.
[0004] The disclosure of the above background art content is only used to assist in understanding the concept and technical solution of the utility model, and it does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background technology should not be used to evaluate the novelty and inventiveness of the present application. CONTENT OF THE UTILITY MODEL
[0005] The present application provides a deep vein catheter, which can effectively prevent air from entering the blood vessel and reduce the complexity of medical operation.
[0006] To achieve the above purpose, the present application adopts the following technical solutions:
[0007] The deep vein catheter comprises a catheter body, a multi-way pipe base, a plurality of branch pipes, a plurality of connecting heads and a plurality of switch valve assemblies. The multi-way pipe base comprises a plurality of input ports and an output port, the output port is in communication with one end of the catheter body; the plurality of branch pipes are arranged in one-to-one correspondence with the plurality of input ports; each branch pipe is in communication with the corresponding input port, and each branch pipe comprises a first pipe segment, a second pipe segment and a third pipe segment, the second pipe segment is connected between the first pipe segment and the third pipe segment, and the third pipe segment is in communication with the corresponding input port; the radius of the second pipe segment is greater than the radius of the first pipe segment and the radius of the third pipe segment; the plurality of connecting heads are arranged in one-to-one correspondence with the plurality of branch pipes, and each connecting head is arranged on the end of the first pipe segment of the corresponding branch pipe away from the second pipe segment; the plurality of switch valve assemblies are arranged in one-to-one correspondence with the plurality of branch pipes, and each switch valve assembly is arranged in the second pipe segment of the corresponding branch pipe; the switch valve assembly comprises a first disc body and a first sealing assembly, the radius of the first disc body is equal to the inner diameter of the second pipe segment, the central axis of the first disc body is coincident with the central axis of the second pipe segment, a first stepped through hole is formed in the first disc body, the first stepped through hole comprises a first hole segment and a second hole segment, the radius of the first hole segment is greater than the radius of the second hole segment, and the second hole segment is located between the connecting head and the first hole segment; and the first sealing assembly is used for controlling the opening and closing of the first hole segment.
[0008] In the embodiment of the present application, the fluid can only enter the catheter body through the first hole segment, the first sealing assembly can be used to open the first hole segment when liquid is transported and to close the second hole segment when liquid is not transported, so that the air can be effectively prevented from entering the blood vessel from the catheter body. In addition, the radius of the second pipe segment being greater than the radius of the first pipe segment and the radius of the third pipe segment can provide more internal space, so that it is easier to arrange the switch valve assembly.
[0009] In some possible implementation manners, the first sealing assembly comprises a first sealing disc, a first elastic member and a first mounting frame, the first sealing disc is slidably arranged in the first hole segment, the radius of the first sealing disc is equal to the radius of the first hole segment, and the central axis of the first sealing disc is coincident with the central axis of the first hole segment; one end of the first elastic member is fixedly connected with the first sealing disc; the other end of the first elastic member is fixedly connected with the first mounting frame, and the first mounting frame is fixedly connected to the inner wall surface of the second pipe segment and located between the connecting head and the first hole segment. In this way, when liquid is input, the first sealing disc will automatically slide out of the first hole segment under the extrusion of the liquid, so as to open the first hole segment. When the liquid input is stopped, the first sealing disc will automatically slide into the first hole segment under the rebounding force provided by the elastic member, so as to close the first hole segment. In this way, on the one hand, the air can be effectively prevented from entering the blood vessel from the catheter body; on the other hand, the medical staff does not need to manually operate the valve to open and close, so that the operation complexity and the work burden of the medical staff are reduced.
[0010] In some possible implementation manners, the central axis of the first stepped through hole coincides with the central axis of the first disc body, the first disc body is further provided with a second stepped through hole, the second stepped through hole comprises a third hole segment and a fourth hole segment, the radius of the third hole segment is greater than the radius of the fourth hole segment, and the third hole segment is located between the connecting head and the fourth hole segment; the switch valve assembly further comprises a second sealing assembly, and the second sealing assembly is used for controlling the opening and closing of the third hole segment. In this way, the second sealing assembly can be used to open the third hole segment when back-flushing is required, and the third hole segment can be closed when back-flushing is not required.
[0011] In some possible implementation manners, the number of the second stepped through holes and the number of the second sealing assemblies are both plural, and the plural second stepped through holes and the plural second sealing assemblies are arranged in one-to-one correspondence. In this way, more back-flushing channels can be provided, so that the back-flushing efficiency can be improved.
[0012] In some possible implementation manners, the first elastic member is a precision spring.
[0013] In some possible implementation manners, each connecting head is provided with a heparin cap. In this way, the gas can be effectively prevented from entering the first pipe segment from the connecting head.
[0014] In some possible implementation manners, the first mounting frame is provided with a hollow hole. In this way, the flow of the liquid can be affected as little as possible, so that the liquid can flow more smoothly.
[0015] In some possible implementation manners, the connection between the second pipe segment and the first pipe segment and the connection between the second pipe segment and the third pipe segment are tapered. In this way, a smooth transition from one diameter to another diameter is provided, the stress applied to the connection can be effectively distributed, so that stress concentration can be reduced, and thus the strength and reliability of the connection between the second pipe segment and the first pipe segment and the connection between the second pipe segment and the third pipe segment can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. It should be understood that the same reference numerals in all the drawings represent the same elements. In the drawings, the sizes of some features can be deformed for the purpose of clarity and convenience of understanding.
[0017] Figure 1 A structural schematic diagram of a deep vein catheter provided by some embodiments of the present application is shown in the figure.
[0018] Figure 2 A structural schematic diagram of a deep vein catheter provided by some embodiments of the present application is shown in the figure. Figure 1 A structural schematic diagram of the internal structure of the second pipe segment in the deep vein catheter shown in the figure.
[0019] Figure 3 A structural schematic diagram of a deep vein catheter provided by some embodiments of the present application is shown in the figure.Figure 2 Structure diagram of the first disc body in the structure shown;
[0020] Figure 4 For Figure 3 Complete structure diagram of the first disc body shown.
[0021] Explanation of reference numerals:
[0022] 1, catheter body; 2, multi-way pipe base; 3, branch pipe; 31, first pipe section; 32, second pipe section; 33, third pipe section; 4, connecting head; 5, switch valve assembly; 51, first disc body; 511, first stepped through hole; 5111, first hole section; 5112, second hole section; 512, second stepped through hole; 5121, third hole section; 5122, fourth hole section; 52, first sealing assembly; 521, first sealing disc; 522, first elastic member; 523, first mounting bracket; 53, second sealing assembly; 531, second sealing disc; 532, second elastic member; 533, second mounting bracket; 6, heparin cap. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0024] It should be noted that, in the description of the present application, the terms "middle", "upper", "lower", "horizontal", "inner", and the like indicating the direction or positional relationship of the terms are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0025] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "linked" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0026] Please refer to Figures 1-4The embodiment of the present application provides a deep vein catheter, which comprises a catheter body 1, a multi-way pipe base 2, a plurality of branch pipes 3, a plurality of connecting heads 4 and a plurality of switch valve assemblies 5. The multi-way pipe base 2 comprises a plurality of input ports and an output port, the output port is communicated with one end of the catheter body 1; the plurality of branch pipes 3 are arranged in one-to-one correspondence with the plurality of input ports; each branch pipe 3 is communicated with the corresponding input port, and each branch pipe 3 comprises a first pipe section 31, a second pipe section 32 and a third pipe section 33, the second pipe section 32 is connected between the first pipe section 31 and the third pipe section 33, and the third pipe section 33 is communicated with the corresponding input port; the radius of the second pipe section 32 is greater than the radius of the first pipe section 31 and the radius of the third pipe section 33; the plurality of connecting heads 4 are arranged in one-to-one correspondence with the plurality of branch pipes 3, and each connecting head 4 is arranged on the end, away from the second pipe section 32, of the first pipe section 31 of the corresponding branch pipe 3; the plurality of switch valve assemblies 5 are arranged in one-to-one correspondence with the plurality of branch pipes 3, and each switch valve assembly 5 is arranged in the second pipe section 32 of the corresponding branch pipe 3, the switch valve assembly 5 comprises a first disc body 51 and a first sealing assembly 52, the radius of the first disc body 51 is equal to the inner diameter of the second pipe section 32, and the central axis of the first disc body 51 is coincident with the central axis of the second pipe section 32; a first stepped through hole 511 is formed in the first disc body 51, the first stepped through hole 511 comprises a first hole section 5111 and a second hole section 5112, the radius of the first hole section 5111 is greater than the radius of the second hole section 5112, the second hole section 5112 is located between the connecting head 4 and the first hole section 5111, and the first sealing assembly 52 is used for controlling the opening and closing of the first hole section 5111.
[0027] In this way, the fluid can only enter the catheter body 1 through the first hole section 5111, the first sealing assembly 52 can be used to open the first hole section 5111 when liquid is transported and close the second hole section 5112 when liquid is not transported, so that the air can be effectively prevented from entering the blood vessel from the catheter body 1. In addition, the radius of the second pipe section 32 is greater than the radius of the first pipe section 31 and the radius of the third pipe section 33, which can provide more internal space, so that the switch valve assembly 5 is more easily arranged.
[0028] For example, in the embodiment shown in the drawings, Figure 1 of course, the present application is not limited to this. In other embodiments, the number of input ports can also be three.
[0029] Please refer to Figure 1 In some embodiments, each connecting head 4 is provided with a heparin cap 6. In this way, the gas can be effectively prevented from entering the first pipe section 31 from the connecting head 4.
[0030] Please refer to Figure 1In some embodiments, the connection between the second pipe segment 32 and the first pipe segment 31 and the connection between the second pipe segment 32 and the third pipe segment 33 are tapered. In this way, a smooth transition from one diameter to another is provided, which can effectively distribute the stress applied at the connection, thereby reducing stress concentration, so that the strength and reliability of the connection between the second pipe segment 32 and the first pipe segment 31 and the connection between the second pipe segment 32 and the third pipe segment 33 can be improved.
[0031] Referring to Figure 2 In some embodiments, the first sealing assembly 52 includes a first sealing disc 521, a first elastic member 522, and a first mounting bracket 523. The first sealing disc 521 is slidably arranged in the first hole segment 5111, and the radius of the first sealing disc 521 is equal to the radius of the first hole segment 5111, and the central axis of the first sealing disc 521 coincides with the central axis of the first hole segment 5111. One end of the first elastic member 522 is fixedly connected to the first sealing disc 521, and the other end of the first elastic member 522 is fixedly connected to the first mounting bracket 523. For example, the first elastic member 522 is a precision spring. Of course, the present application is not limited thereto. In other embodiments, the first elastic member 522 can also be an elastic rubber column.
[0032] The first mounting bracket 523 is fixedly connected to the inner wall surface of the second pipe segment 32, and the first mounting bracket 523 is located between the connector 4 and the first hole segment 5111. In this way, when the liquid is input, the first sealing disc 521 will automatically slide out of the first hole segment 5111 under the extrusion of the liquid, thereby opening the first hole segment 5111. When the liquid input stops, the first sealing disc 521 automatically slides into the first hole segment 5111 by the elastic force provided by the elastic member, thereby closing the first hole segment 5111. In this way, on the one hand, air is effectively prevented from entering the blood vessel from the catheter body 1; on the other hand, medical personnel do not need to manually operate the valve to open and close, reducing the complexity of operation and the work burden of medical personnel.
[0033] Referring to Figure 2 in combination with Figure 3 and Figure 4 In some embodiments, the central axis of the first stepped through hole 511 coincides with the central axis of the first disc body 51, and the second stepped through hole 512 is further provided on the first disc body 51. The second stepped through hole 512 includes a third hole segment 5121 and a fourth hole segment 5122, the radius of the third hole segment 5121 is greater than the radius of the fourth hole segment 5122, and the third hole segment 5121 is located between the connector 4 and the fourth hole segment 5122. The on-off valve assembly 5 further includes a second sealing assembly 53 for controlling the opening and closing of the third hole segment 5121. In this way, the second sealing assembly 53 can be used to open the third hole segment 5121 when backflow is needed, and to close the third hole segment 5121 when backflow is not needed.
[0034] Exemplarily, the structure of the second sealing assembly 53 is the same as that of the first sealing assembly 52, and the second sealing assembly 53 comprises a second elastic member 532 corresponding to the first elastic member 522, a second sealing disc 531 corresponding to the first sealing disc 521, and a second mounting bracket 533 corresponding to the first mounting bracket 523. When the back flushing is performed, the second sealing disc 531 slides out of the third hole section 5121 under the action of the negative pressure, thereby opening the third hole section 5121. When the back flushing is stopped, the elastic force of the second elastic member 532 makes the second sealing disc 531 automatically reset to close the third hole section 5121.
[0035] It can be understood that the mounting bracket is used to support the elastic member, and the shape of the second mounting bracket 533 corresponding to the first mounting bracket 523 of the second sealing assembly 53 can be different from that of the first mounting bracket 523, as long as the same effect is achieved.
[0036] Please refer to Figure 3 In some embodiments, the number of the second stepped through holes 512 and the number of the second sealing assemblies 53 are both multiple, and the multiple second stepped through holes 512 and the multiple second sealing assemblies 53 are arranged one by one. In this way, more back flushing channels can be provided, thereby improving the back flushing efficiency.
[0037] It can be understood that in other embodiments, the number of the second stepped through holes 512 can be determined according to actual needs, which is not limited herein.
[0038] In some embodiments, the first mounting bracket 523 is provided with a hollow hole (not shown in the figure). In this way, the flow of the liquid can be affected as little as possible, and the liquid flow can be smoother.
[0039] The above describes the present application and its embodiments, which are not limited. The embodiments shown in the full text are only one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by the above description, without departing from the spirit of the present application, similar structural modes and embodiments can be designed without creative design, which should belong to the protection scope of the present application.
Claims
1. A deep vein catheter, characterized in that, The utility model relates to a multi-way catheter, comprising: a catheter body; a multi-way catheter seat comprising a plurality of input ports and an output port, the output port being in communication with one end of the catheter body; a plurality of branch pipes, each of the branch pipes being in communication with a corresponding input port, each of the branch pipes comprising a first pipe segment, a second pipe segment and a third pipe segment, the second pipe segment being connected between the first pipe segment and the third pipe segment, the third pipe segment being in communication with the corresponding input port, the radius of the second pipe segment being greater than the radius of the first pipe segment and the radius of the third pipe segment; a plurality of connecting heads, each of the connecting heads being arranged on the end of the first pipe segment of the corresponding branch pipe away from the second pipe segment; a plurality of switch valve assemblies, each of the switch valve assemblies being arranged in the second pipe segment of the corresponding branch pipe, the switch valve assembly comprising a first disc body and a first sealing assembly, the radius of the first disc body being equal to the inner diameter of the second pipe segment, the central axis of the first disc body being coincident with the central axis of the second pipe segment, the first disc body being provided with a first stepped through hole, the first stepped through hole comprising a first hole segment and a second hole segment, the radius of the first hole segment being greater than the radius of the second hole segment, the second hole segment being located between the connecting head and the first hole segment, the first sealing assembly being used for controlling the opening and closing of the first hole segment.
2. The deep vein catheter of claim 1, wherein, The first sealing assembly comprises: a first sealing disc, the first sealing disc being slidably arranged in the first hole segment, the radius of the first sealing disc being equal to the radius of the first hole segment, the central axis of the first sealing disc being coincident with the central axis of the first hole segment; a first elastic member, one end of the first elastic member being fixedly connected with the first sealing disc; a first mounting rack, the other end of the first elastic member being fixedly connected with the first mounting rack, the first mounting rack being fixedly connected to the inner wall surface of the second pipe segment, the first mounting rack being located between the connecting head and the first hole segment.
3. The deep vein catheter of claim 2, wherein, The central axis of the first stepped through hole is coincident with the central axis of the first disc body, the first disc body being further provided with a second stepped through hole, the second stepped through hole comprising a third hole segment and a fourth hole segment, the radius of the third hole segment being greater than the radius of the fourth hole segment, the third hole segment being located between the connecting head and the fourth hole segment; the switch valve assembly further comprises a second sealing assembly, the second sealing assembly being used for controlling the opening and closing of the third hole segment.
4. The deep vein catheter of claim 3, wherein, The number of the second stepped through holes and the number of the second sealing assemblies are both plural, the plurality of second stepped through holes being arranged in one-to-one correspondence with the plurality of second sealing assemblies.
5. The deep vein catheter of claim 2, wherein, The first elastic member is a precision spring.
6. The deep vein catheter according to any one of claims 2-5, wherein, Each of the connecting heads is provided with a heparin cap.
7. The deep vein catheter of claim 1, wherein, The connection between the second pipe segment and the first pipe segment and the connection between the second pipe segment and the third pipe segment are tapered.