Syringe pressure fitting and syringe

Abstract

The application discloses a syringe pressure connector and a syringe. The syringe pressure connector comprises a pipeline body with a channel, the channel has a tube side opening and a valve plate socket; a pressure indicating cylinder which is axially intersected with the channel, the first end of the pressure indicating cylinder has a cylinder end opening, the pressure indicating cylinder further comprises a cylinder side opening and a cylinder cavity; an indicating piston which comprises an indicating piston head and an indicating piston tail column, the indicating piston head is opposite to the position of the tube side opening, the indicating piston tail column can extend out of the pressure indicating cylinder from the cylinder end opening; a first spring which is used for providing resistance to the movement of the indicating piston; a pressure conducting pipe which is located between the cylinder side opening and the valve plate socket; a pressure regulating piston which comprises a pressure regulating piston head and a pressure regulating piston tail valve plate, the pressure regulating piston head is opposite to the position of the cylinder side opening, the pressure regulating piston tail valve plate can extend into the channel from the valve plate socket; and a second spring which is used for providing resistance to the movement of the pressure regulating piston. The application can avoid overpressure injection and agile feedback control.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a syringe pressure connector and a syringe. Background Technology

[0002] In the medical field, it is often necessary to measure and indicate injection pressure. For example, during spinal anesthesia, excessive injection pressure may damage the spinal cord. Therefore, to prevent excessive injection pressure, it is necessary to display and limit the injection pressure. CN114403996A proposes an anesthesia puncture fixation device that can guide the syringe using a support tube at a specified tilt angle, which helps to control the injection pressure to some extent. Existing technologies often add a valve at the syringe outlet to limit the injection pressure near the spinal end; however, this limitation creates a pressure difference between the syringe end and the spinal end, making the pressure at the syringe end difficult to control and increasing the risks of the anesthesia procedure. Summary of the Invention

[0003] In view of this, this application proposes a syringe pressure connector and a syringe, which can solve the above-mentioned existing technical problems. This application provides the following technical solution.

[0004] A syringe pressure connector includes: a tubing body having an inlet and an outlet, a channel between the inlet and the outlet, and a tube-side opening and a valve plate socket on the side of the channel; a pressure indicator cylinder, the axial direction of which intersects the axial direction of the channel, a first end of which has a cylinder end opening, the pressure indicator cylinder further including a tube-side opening and a cylinder cavity, a first end of which abuts against the tube end opening, and a second end of which abuts against the tube-side opening; and an indicator piston disposed inside the cylinder cavity, including an indicator piston head and an indicator piston tail, the indicator piston head being positioned opposite the tube-side opening. The indicator piston tail column can extend out of the pressure indicator cylinder from the cylinder end opening; a first spring, the first spring being disposed inside the cylinder cavity, is used to provide resistance to the movement of the indicator piston; a pressure transmission tube, the pressure transmission tube being located between the cylinder side opening and the valve plate insertion port; a pressure regulating piston, the pressure regulating piston being located inside the pressure transmission tube, including a pressure regulating piston head and a pressure regulating piston tail valve plate, the pressure regulating piston head being positioned opposite the cylinder side opening, and the pressure regulating piston tail valve plate being able to extend into the channel from the valve plate insertion port; a second spring, the second spring being disposed inside the pressure transmission tube, is used to provide resistance to the movement of the pressure regulating piston.

[0005] Optionally, the height of the cylinder side opening is set to be flush with the height of the position of the indicator piston head when the pipeline pressure is equal to a preset threshold.

[0006] Optionally, the thickness of the indicating piston head is greater than or equal to the width of the cylinder side opening.

[0007] Optionally, a sealing ring is provided between the indicating piston head and the cylinder cavity.

[0008] Optionally, a sealing gasket is provided near the valve plate socket.

[0009] Optionally, the indicating piston further includes an indicating mark disposed on the piston tailstock, the indicating mark being used to indicate the injection pressure magnitude.

[0010] Optionally, it further includes: a vent hole, which is located on the pressure transmission tube and close to the valve plate inlet.

[0011] Optionally, it further includes a gap, which is provided between the cylinder end opening and the piston tailstock.

[0012] Optionally, the axial direction of the pressure indicator cylinder is perpendicular to the axial direction of the channel.

[0013] A syringe, including the syringe pressure connector of this application.

[0014] According to the technical solution of this application, by designing a pressure indicator cylinder and an indicator piston, the indicator piston extends from the pressure indicator cylinder when the injection pressure increases, making it easy for the user to read the injection pressure. Furthermore, by designing a pressure transmission tube and a pressure regulating piston, the channel is automatically closed the instantaneously when the injection pressure exceeds the limit. Because the channel is closed instantaneously, there is no slow closing process during the injection of anesthetic, so the channel remains fully open when unobstructed. Therefore, this syringe pressure connector can achieve instantaneous and flexible switching between 100% and 0% opening, effectively avoiding injection overpressure and achieving agile feedback control. The syringe pressure connector and syringe of this application also have advantages such as simple structure, convenient use, easy replacement, and wide applicability. Attached Figure Description

[0015] For illustrative and not limiting purposes, this application will now be described with reference to preferred embodiments, and in particular with reference to the accompanying drawings, in which:

[0016] Figure 1 This is a perspective view of a syringe pressure connector according to an exemplary embodiment of this application;

[0017] Figure 2 This is a cross-sectional view of a syringe pressure connector according to an exemplary embodiment of this application;

[0018] Figure 3 This is a usage scenario diagram of a syringe pressure connector according to an example embodiment of this application;

[0019] Figures 4A to 4C This is a schematic diagram of the operation of a syringe pressure connector according to an exemplary embodiment of this application.

[0020] In the diagram: Pipe body 10, inlet 101, outlet 102, channel 103, pipe side opening 104, valve plate socket 105, sealing gasket 106, pressure indicator cylinder 20, cylinder end opening 201, cylinder side opening 202, cylinder cavity 203, indicator piston 30, indicator piston head 301, indicator piston tail column 302, indicator mark 303, sealing ring 304, first spring 40, pressure transmission tube 50, pressure regulating piston 60, pressure regulating piston head 601, pressure regulating piston tail valve plate 602, second spring 70, vent hole 80, gap 90, syringe pressure connector 1, anesthetic needle 2, anesthetic syringe 3. Detailed Implementation

[0021] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. In the description of this application, the first end can be defined as the upper end or top end shown in the figures, and the second end can be defined as the lower end or bottom end shown in the figures, but this is merely illustrative and not limiting.

[0023] like Figure 1 and Figure 2 As shown, the syringe pressure connector of the example embodiment of this application mainly includes a tubing body 10, a pressure indicator cylinder 20, an indicator piston 30, a first spring 40, a pressure transmission tube 50, a pressure regulating piston 60, and a second spring 70.

[0024] The main body of the pipe 10 has an inlet 101 and an outlet 102, with a channel 103 between the inlet 101 and the outlet 102. The channel 103 has a pipe-side opening 104 and a valve plate socket 105 on its side. In the syringe pressure connector of the embodiments of this application, it is preferred, but not mandatory, that the inlet 101 is a Luer connector. Luer connectors are easy to assemble, have high connection strength, and can resist separation caused by axial force and torque.

[0025] The axial direction of the pressure indicator cylinder 20 intersects the axial direction of the channel 103. Preferably, the axial direction of the pressure indicator cylinder 20 and the axial direction of the channel 103 are perpendicular to each other. This perpendicularity is more in line with design habits and is easier to manufacture by mold.

[0026] The pressure indicator cylinder 20 has an open first end, with a cylinder end opening 201. The pressure indicator cylinder 20 also includes a cylinder side opening 202 and a cylinder cavity 203. The first end of the cylinder cavity 203 abuts against the cylinder end opening 201, and the second end of the cylinder cavity 203 abuts against the cylinder side opening 104.

[0027] The indicating piston 30 is disposed inside the cylinder cavity 203 and is movable axially along the cylinder cavity 203. The indicating piston 30 includes an indicating piston head 301 and an indicating piston tail 302. The indicating piston head 301 is positioned opposite the pipe-side opening 104. The indicating piston tail 302 is able to extend out of the pressure indicating cylinder 20 from the cylinder end opening 201. Preferably, but not necessarily, the indicating piston 30 also includes an indicating mark 303 (e.g., ...) provided on the piston tail 302. Figure 2 As shown), indicator mark 303 is used to indicate the injection pressure.

[0028] A first spring 40 is disposed inside the cylinder cavity 203 to provide resistance to the movement of the indicating piston 30. The first spring 40 is located between the inner surface of the first end of the pressure indicating cylinder 20 and the indicating piston head 301. Specifically, the first end of the first spring 40 abuts against the inner surface of the first end of the pressure indicating cylinder 20, and the second end of the first spring 40 abuts against the indicating piston head 301.

[0029] The pressure transmission tube 50 is located between the cylinder-side opening 202 and the valve plate inlet 105, and is used to connect the cylinder-side opening 202 and the valve plate inlet 105. The pressure transmission tube 50 preferably adopts a design with a smooth extension and no abrupt bends.

[0030] The pressure regulating piston 60 is located inside the pressure transmission tube 50 and is movable along the axial direction of the pressure transmission tube 50. The pressure regulating piston 60 may include a pressure regulating piston head 601 and a pressure regulating piston tail valve plate 602. The pressure regulating piston head 601 is positioned opposite the cylinder side opening 202. This relative position is not limited to the orientation of the piston head 301 and the tube side opening 104, but rather means that there is no obstruction between the pressure regulating piston head 601 and the cylinder side opening 202, allowing the anesthetic fluid to flow from the cylinder side opening 202 into the pressure transmission tube 50 and then push the pressure regulating piston head 601. The pressure regulating piston tail valve plate 602 can extend into the channel 103 from the valve plate insertion port 105, thereby adjusting the opening degree of the channel 103.

[0031] A second spring 70 is disposed inside the pressure transmission tube 50 to provide resistance to the movement of the pressure regulating piston 60. The second spring 70 is located between the pressure regulating piston head 601 and the side wall of the channel 103 near the valve plate inlet 105. Specifically, the first end of the second spring 70 abuts against the pressure regulating piston head 601, and the second end of the second spring 70 abuts against the side wall of the channel 103 near the valve plate inlet 105.

[0032] It should be noted that in the syringe pressure connector of this embodiment, the height of the barrel-side opening 202 is set to be flush with the height of the indicator piston head 301 when the pipeline pressure equals a preset threshold. If the barrel-side opening 202 is too high, it means that the side path of the pressure transmission tube 50 is difficult to open, the pressure regulation feedback is delayed, and by the time the indicator piston head 301 moves to the flush height, the pipeline pressure is already very high, significantly increasing the risk. The opening setting of the side path of the pressure transmission tube 50 is controlled by the elastic strength of the first spring 40.

[0033] It should also be noted that in the syringe pressure connector of this application embodiment, the thickness of the indicator piston head 301 is greater than or equal to the width of the barrel side opening 202. If the indicator piston head 301 is too thin, it may result in the following: the anesthetic fluid first enters the lower section of the barrel cavity 203 from the channel 103, then pushes the indicator piston head 301 upward to the vicinity of the barrel side opening 202, and then the anesthetic fluid bypasses the overly thin indicator piston head 301 through the side path of the barrel side opening 202, and finally diffuses to the upper section of the barrel cavity 203, thereby causing the anesthetic fluid to not flow completely to the pressure transmission tube 50, and making it impossible to implement sensitive and reliable feedback control.

[0034] To enhance sealing, in the syringe pressure connector of this embodiment, a sealing ring 304 may be provided between the indicating piston head 301 and the barrel cavity 203 to prevent the tube-side opening 104 from directly communicating with the outside. Preferably, the indicating piston head 301 may have multiple layers (e.g., three layers) of sealing rings 304. In addition, a sealing gasket 106 may be provided near the valve plate inlet 105 to prevent the valve plate inlet 105 from directly communicating with the outside.

[0035] The syringe pressure connector of this embodiment may further include a vent hole 80, which is located on the pressure transmission tube 50 and close to the valve plate inlet 105. This vent hole 80 is used to discharge gas below the pressure regulating piston head 601.

[0036] The syringe pressure connector of this embodiment may further include a gap 90, which is disposed between the barrel end opening 201 and the piston tail post 302. This gap 90 is used to discharge air while providing a certain damping force.

[0037] Figure 3This is a usage scenario diagram of a syringe pressure connector according to an exemplary embodiment of this application. As shown in the figure, the downstream end of the syringe pressure connector 1 can be connected to an anesthesia needle 2, and the upstream end can be connected to an anesthesia syringe 3.

[0038] Figures 4A to 4C This is a schematic diagram of the operation of a syringe pressure connector according to an exemplary embodiment of this application. Arrowed lines are used in the diagram to indicate the flow direction of the anesthetic fluid.

[0039] like Figure 4A As shown, the anesthetic fluid mainly flows into the channel 103 from the inlet 101 and then out from the outlet 102. Part of the anesthetic fluid enters the cylinder 203 from the tube side opening 104, pushing the indicator piston head 301 of the indicator piston 30 upwards, thereby causing the piston tail 302 of the indicator piston 30 to extend upwards from the cylinder end opening 201. During the upward movement of the indicator piston 30, the first spring 40 provides resistance to the movement of the indicator piston 30, and also compresses to store energy so that it can push the indicator piston 30 downwards to reset. The user can preliminarily judge the injection pressure based on the length of the piston tail 302 exposed outside the pressure indicator cylinder 20; in the embodiment with an indicator mark 303, the user can obtain the injection pressure value more intuitively and accurately by reading the indicator mark 303.

[0040] As the injection pressure gradually increases, a portion of the anesthetic fluid pushes the indicator piston 30 upward. Simultaneously, another portion of the anesthetic fluid enters the pressure transmission tube 50 through the side opening 202, pushing the pressure regulating piston head 601 of the pressure regulating piston 60 downward. This causes the valve plate 602 at the tail of the pressure regulating piston to move downward and extend from the valve plate insertion port 105 into the channel 103, thereby reducing the flow cross-sectional area of ​​the channel 103, i.e., reducing the opening degree of the channel 103. During the downward movement of the pressure regulating piston 60, the second spring 70 provides resistance to the movement of the pressure regulating piston 60 on one hand, and on the other hand, the spring is compressed to store energy to facilitate the subsequent reset of the pressure regulating piston 60.

[0041] When the injection pressure increases to the preset threshold, the pressure regulating piston 60 moves significantly downward, and the valve plate 602 at the tail of the pressure regulating piston completely closes the channel 103. The anesthetic fluid cannot flow out of the outlet 102, as... Figure 4B As shown.

[0042] The pressure in the injection pressure fitting can be reduced by manual pressure adjustment and / or by slowly releasing pressure using a gap. As the pipe pressure in channel 103 decreases, such as... Figure 4C As shown, the compressed second spring 70 pushes the adjusting piston 60 upward, causing the valve plate 602 at the tail of the pressure adjusting piston to rise, the channel 103 to be opened again, and the anesthetic liquid to flow out from the outlet 102 again.

[0043] The syringe pressure connector according to the embodiments of this application, by designing a pressure indicator cylinder and an indicator piston, allows the indicator piston to extend from the pressure indicator cylinder when the injection pressure increases, facilitating user reading of the injection pressure. Furthermore, by designing a pressure transmission tube and a pressure regulating piston, the channel is automatically closed the instantaneously when the injection pressure exceeds the limit. Because the channel is closed instantaneously, there is no slow closing process during anesthetic injection, so the channel remains fully open when unobstructed. Therefore, this syringe pressure connector can achieve instantaneous and flexible switching between 100% and 0% opening, effectively preventing overpressure and achieving agile feedback control. The syringe pressure connector of this application also has advantages such as simple structure, convenient use, easy replacement, and wide applicability.

[0044] The syringe according to an embodiment of this application includes the syringe pressure connector of this application. This syringe also has advantages such as simple structure, convenient use, easy replacement, and wide applicability.

[0045] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A syringe pressure connector, characterized in that, include: The pipe body (10) has an inlet (101) and an outlet (102), and a channel (103) is provided between the inlet (101) and the outlet (102). The channel (103) has a pipe-side opening (104) and a valve plate socket (105) on its side. A pressure indicator cylinder (20) is provided, the axial direction of which intersects the axial direction of the channel (103). The first end of the pressure indicator cylinder (20) has a cylinder end opening (201). The pressure indicator cylinder (20) also includes a cylinder side opening (202) and a cylinder cavity (203). The first end of the cylinder cavity (203) abuts against the cylinder end opening (201), and the second end of the cylinder cavity (203) abuts against the pipe side opening (104). The cylinder cavity (203) communicates with the channel (103) through the pipe side opening (104). An indicator piston (30) is disposed inside the cylinder cavity (203) and includes an indicator piston head (301) and an indicator piston tail (302). The indicator piston head (301) is positioned opposite to the tube side opening (104), and the indicator piston tail (302) can extend out of the pressure indicator cylinder (20) from the cylinder end opening (201). A first spring (40) is disposed inside the cylinder cavity (203) to provide resistance to the movement of the indicator piston (30); Pressure transmission tube (50), the pressure transmission tube (50) is located between the cylinder side opening (202) and the valve plate socket (105); A pressure regulating piston (60) is located inside the pressure transmission tube (50) and includes a pressure regulating piston head (601) and a pressure regulating piston tail valve plate (602). The pressure regulating piston head (601) is positioned opposite to the cylinder side opening (202), and the pressure regulating piston tail valve plate (602) can extend into the channel (103) from the valve plate insertion port (105). A second spring (70) is disposed inside the pressure transmission tube (50) to provide resistance to the movement of the pressure regulating piston (60).

2. The syringe pressure connector according to claim 1, characterized in that, The height of the cylinder side opening (202) is set to be level with the height of the position of the indicator piston head (301) when the pipeline pressure is equal to a preset threshold.

3. The syringe pressure connector according to claim 1, characterized in that, The thickness of the indicator piston head (301) is greater than or equal to the width of the cylinder side opening (202).

4. The syringe pressure connector according to any one of claims 1 to 3, characterized in that, A sealing ring (304) is provided between the indicator piston head (301) and the cylinder cavity (203).

5. The syringe pressure connector according to any one of claims 1 to 3, characterized in that, A sealing gasket (106) is provided near the valve plate inlet (105).

6. The syringe pressure connector according to any one of claims 1 to 3, characterized in that, The indicator piston (30) also includes an indicator mark (303) disposed on the piston tail post (302), the indicator mark (303) being used to indicate the injection pressure magnitude.

7. The syringe pressure connector according to any one of claims 1 to 3, characterized in that, Also includes: An exhaust port (80) is provided on the pressure transmission tube (50) and located near the valve plate inlet (105).

8. The syringe pressure connector according to any one of claims 1 to 3, characterized in that, Also includes: A gap (90) is provided between the cylinder end opening (201) and the piston tail column (302).

9. The syringe pressure connector according to any one of claims 1 to 3, characterized in that, The axial direction of the pressure indicator cylinder (20) is perpendicular to the axial direction of the channel (103).

10. A syringe, characterized in that, Includes the syringe pressure connector according to any one of claims 1 to 9.

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