High-pressure radiography injector and system assembly

Abstract

The invention relates to the technical field of medical consumables, in particular to a high-pressure radiography injector system assembly which comprises a needle head assembly, a pressing plate is arranged at the bottom end of the needle head assembly, the needle head assembly comprises a needle tube, and the needle tube is provided with a needle tip part. After a traditional suction nozzle is arranged on the waist, the needle tip part is arranged to be in a sharper state, so that the needle tube can be conveniently inserted into a liquid medicine bottle and can be conveniently plugged into a rubber plug, in addition, a membrane suction opening is located at the rubber plug, compared with an existing needle tube, no liquid medicine is left, liquid medicine backflow cannot be caused when the membrane suction opening is pulled out, and the needle tube is convenient to use. The film suction port is plugged by adopting a negative pressure film assembly, so that chippings are prevented from entering the film suction port when a rubber plug is inserted, the interior of the film suction port is also in a closed state before suction, and after suction, the negative pressure can apply a reverse suction force to the film due to the fact that the interior of the drip bottle is in a negative pressure state, namely when the film suction port is pulled out; therefore, the membrane suction port can be further blocked.

Description

Technical Field

[0001] The invention relates to the technical field of medical consumables, and in particular to a high-pressure angiography injector and a system component. Background Art

[0002] The high-pressure contrast injector is a professional device used for accurate and rapid injection of contrast agents (contrast agents) in medical imaging examinations. It is commonly used in examinations such as CT, MRI, and angiography (DSA).

[0003] In the process of extracting medicine using a syringe, the applicant found the following problems:

[0004] Problem 1: After the needle tip is inserted into the medicine bottle, the bottle needs to be inverted and then suctioned. There is a high vacuum at the needle tip, and the medicine in the medicine bottle will remain at the end, so the needle tip needs to be pulled out a certain distance;

[0005] Problem 2: When the needle tip is pulled out, the medicine inside will flow back and be discharged, resulting in a waste of medicine;

[0006] Question 3: The needle tip is set at an inclined surface. When the needle tip is inserted, the needle hole will carry rubber plug fragments into it, posing a safety hazard. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a high-pressure contrast injection syringe and system components.

[0008] The technical solution of the present invention is implemented as follows: a high-pressure contrast injection system assembly includes a needle assembly, a pressing plate is arranged at the bottom end of the needle assembly, the needle assembly includes a needle tube, the needle tube has a needle tip portion, and two membrane suction ports arranged above the pressing plate, a negative pressure membrane assembly is arranged in the membrane suction port, and a reserved portion is also reserved in the membrane suction port;

[0009] It also includes a primary negative pressure lock, which is located below the inner cavity of the needle tube. The primary negative pressure lock has two parts connected to the negative pressure membrane assembly, and when negative pressure is generated below, the primary negative pressure lock can open the communication channel.

[0010] The syringe aspiration needle disclosed in the solution of this application has a traditional aspiration nozzle set at the waist, and the shape of the tip part is set to be sharper, which facilitates the insertion of the syringe into the medicine bottle and also into the rubber stopper. In addition, the membrane suction port is located at the rubber stopper. Compared with the existing syringe, there is no residual medicine, and when pulled out, there will be no backflow of medicine. Moreover, the membrane suction port is blocked by a negative pressure membrane assembly. When inserted, it prevents debris from entering during the insertion of the rubber stopper, and before aspiration, the inside is also in a closed state. After aspiration, since the drip bottle is in a negative pressure state, that is, when pulled out, the negative pressure can exert a reverse suction force on the membrane, which can further block the membrane suction port.

[0011] Further, the shape of the membrane suction port is bowl-shaped. The inner wall of the membrane suction port is provided with floating holes. The negative pressure membrane assembly is provided with an annular strengthening part, and the annular strengthening part is in the floating holes. The front and rear sides of the inner wall of the membrane suction port are also provided with liquid inlet reserved parts, and the surface of the membrane assembly contacts the inner wall of the liquid inlet reserved parts;

[0012] The negative pressure membrane assembly includes a membrane assembly. The membrane assembly is flat. The membrane assembly at the position closer to the inside of the annular strengthening part is hard. The membrane assembly also has a negative pressure closing membrane that blocks the membrane suction port. The inner wall of the membrane assembly is provided with an annular hard part, and a circular opening is provided at the center of the annular hard part.

[0013] Further, there is a concave part between the reserved part and the membrane suction port, and the annular pressing membrane is used to fill the concave part.

[0014] When specifically aspirating medicine, when a suction force is generated at the position of the primary negative pressure locking part, the primary negative pressure locking part opens the channel. While the internal air flows outwards, the primary negative pressure locking part can pull the annular hard part outwards. Then, the annular hard part will cause the membrane assembly to move. When the annular strengthening part moves in the floating holes, the membrane assembly is separated from the inner wall of the liquid inlet reserved part. In this way, the liquid inlet reserved part will open the liquid inlet channel, and the liquid enters from the liquid inlet reserved part. Since the reserved part is set with a smaller diameter, the airflow generated is fast, and the airflow can be used to assist in opening the negative pressure membrane assembly. The setting of the annular pressing membrane can avoid the sucker effect formed between the annular hard part and the concave part when the negative pressure membrane assembly moves to the position of the annular pressing membrane. When the annular hard part approaches the annular pressing membrane, the action of the gas in the annular pressing membrane can generate an irregular contact force to avoid being adsorbed together;

[0015] In addition, since in the normal state of the negative pressure membrane assembly, its shape bulges outwards, the membrane assembly can always block the liquid inlet reserved part and keep the membrane suction port sealed to avoid backflow of medicine. It also opens with the external pressure, and the response is more rapid.

[0016] Furthermore, the first-level negative pressure lock includes a port fixed on the inner wall of the needle tube, and a suction membrane sleeved in the port, two connecting strips are arranged on the top of the suction membrane, a protrusion is arranged on the connecting strip, and a ring protrusion matching the protrusion is arranged in the needle tube.

[0017] During the suction process, a negative pressure state is first generated, and the suction membrane in the opposite port will be out of contact with the opposite port. In this way, when the suction membrane moves downward, the connecting strip drives the annular hard part to move. At this time, the raised block on the connecting strip contacts the annular convex port and displaces radially. At this time, under the action of suction and guidance, the negative pressure membrane assembly can be more conveniently moved out of the membrane suction port. Among them, when the negative pressure membrane assembly fully opens the membrane suction port, the raised block is located obliquely above the annular convex port. The purpose of this setting is that when the suction force is lost, the arc surface also facilitates the resetting of the raised block, so as to completely seal the membrane suction port.

[0018] Furthermore, a locking groove is provided on the needle tube.

[0019] The setting of the locking groove allows the position of the rubber stopper on the needle tube to be observed when the needle tube is inserted into the rubber stopper, thereby judging whether the needle tube is inserted in place. At this time, the membrane suction port is just located on the inner side of the rubber stopper, thereby providing a better measurement standard when sucking the medicine liquid, that is, the medicine liquid can be completely sucked out of the bottle.

[0020] Furthermore, it also includes a pressure control component, which includes a damping sleeve, a rod body is arranged through the damping sleeve, a suction cup membrane is fixedly connected to the top of the rod body, a piston is arranged at the bottom of the rod body, an open channel is also arranged in the needle tube, and the piston set is arranged in the open channel.

[0021] The settings of the voltage control components have the following effects:

[0022] When the liquid is sucked, after the needle is inserted into the bottle, the liquid inside enters the pressure control component from the connecting hole, and is injected between the damping sleeve and the suction cup membrane. In this way, the pressure control component can be kept under the action of the pressure chamber. Figure 6 In this way, when suction is performed, it is ensured that the negative pressure membrane assembly is opened first when negative pressure is generated;

[0023] Reducing the space in the needle tube cavity ensures that less air enters the syringe during the suction process, and the pressure chamber is at negative pressure.

[0024] A syringe, applied to a high-pressure contrast injection system component as described in any one of claims 1 to 6, comprising a Y-shaped infusion tube, the Y-shaped infusion tube is connected to two injection syringes, a puncture needle is provided at the end of the Y-shaped infusion tube, and a strap for tying on a patient's arm is provided on the Y-shaped infusion tube.

[0025] The present invention has the following beneficial effects:

[0026] 1. By setting the traditional suction nozzle to the waist and setting the shape of the needle tip to a sharper state, it is convenient to insert the needle tube into the medicine bottle and the rubber stopper. In addition, the membrane suction port is located at the rubber stopper. Compared with the existing needle tube, there is no medicine residue, and when it is pulled out, it will not cause the medicine to flow back. The membrane suction port is sealed with a negative pressure membrane component. When inserted, it prevents debris from entering the rubber stopper. Before suction, the inside is also in a closed state. After suction, since the drip bottle is in a negative pressure state, that is, when it is pulled out, the negative pressure can exert a reverse suction force on the membrane, so that the membrane suction port can be further sealed.

[0027] 2. During the suction process, a negative pressure state is first generated, and the suction membrane in the opposite port will be out of contact with the opposite port. In this way, when the suction membrane moves downward, the connecting strip drives the annular hard part to move. At this time, the raised block on the connecting strip contacts the annular convex port and displaces radially. At this time, under the action of suction and guidance, the negative pressure membrane assembly can be more conveniently moved from the membrane suction port. Among them, when the negative pressure membrane assembly fully opens the membrane suction port, the raised block is located obliquely above the annular convex port. The purpose of this setting is that when the suction force is lost, the arc surface also facilitates the resetting of the raised block, so as to completely seal the membrane suction port.

[0028] 3. The setting of the locking groove, when the needle tube is inserted into the rubber stopper, the position of the rubber stopper in the needle tube can be observed to judge whether the needle tube is inserted in place. At this time, the membrane suction port is just located on the inner side of the rubber stopper, thereby providing a better measurement standard when sucking the liquid medicine, that is, the liquid medicine can be completely sucked out of the bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a syringe with a needle assembly of the present invention;

[0030] Figure 2 is a cross-sectional view of a needle tube of the present invention;

[0031] Figure 3 The present invention Figure 2 Enlarged view of point B in the middle;

[0032] Figure 4 is a schematic diagram of the negative pressure membrane assembly of the present invention;

[0033] Figure 5 is a schematic diagram of the negative pressure closed membrane in the present invention;

[0034] Figure 6 The present invention Figure 2 Enlarged view of point A in the middle;

[0035] Figure 7 is a schematic diagram of the locking groove in the present invention;

[0036] Figure 8 It is a schematic diagram of a syringe with a Y-shaped infusion tube according to the present invention.

[0037] In the picture

[0038] 1. Needle assembly; 2. Needle tube; 21. Needle tip part; 22. Membrane suction port; 221. Floating hole; 222. Annular pressure membrane; 223. Liquid inlet reserved part; 23. Negative pressure membrane assembly; 231. Membrane assembly; 2311. Negative pressure closing membrane; 232. Annular reinforcement part; 233. Annular hard part; 2331. Circular mouth; 24. Reserved part; 25. Locking groove; 3. Pressure control assembly; 31. Damping sleeve; 32. Open channel; 33. Rod body; 34. Piston one; 35. Suction cup membrane; 4. Primary negative pressure lock; 41. Matching port; 42. Suction membrane; 43. Connecting strip; 44. Raised block; 44-1. Annular convex port; 5. Spiral tube; 6. Injection syringe; F. Connecting hole; P. Pressure chamber; 7. Y-shaped infusion tube; 8. Binding strap; 9. Puncture needle. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 8 As shown, a high-pressure contrast injection system assembly includes a needle assembly 1, a pressing plate is arranged at the bottom end of the needle assembly 1, the needle assembly 1 includes a needle tube 2, the needle tube 2 has a needle tip portion 21, and two membrane suction ports 22 arranged above the pressing plate, a negative pressure membrane assembly 23 is arranged in the membrane suction port 22, and a reserved portion 24 is also reserved in the membrane suction port 22;

[0041] It also includes a primary negative pressure lock 4, which is located below the inner cavity of the needle tube 2. The primary negative pressure lock 4 has two parts connected to the negative pressure membrane assembly 23, and when negative pressure is generated below, the primary negative pressure lock 4 can open the communication channel.

[0042] The syringe suction needle disclosed in the present application scheme is achieved by setting the traditional suction nozzle to the waist and setting the shape of the needle tip part 21 to a more pointed state, which makes it easy to insert the needle tube 2 into the medicine bottle and the rubber stopper. In addition, the membrane suction port 22 is located at the rubber stopper. Compared with the existing needle tube 2, there is no medicine residue, and when it is pulled out, it will not cause the medicine to flow back. The membrane suction port 22 is sealed with a negative pressure membrane component 23. When inserted, it prevents debris from entering the rubber stopper when it is inserted. Before suction, the interior is also in a closed state. After suction, since the drip bottle is in a negative pressure state, that is, when it is pulled out, the negative pressure can exert a reverse suction force on the membrane, so that the membrane suction port 22 can be further sealed.

[0043] The membrane suction port 22 is in the shape of a bowl, and a floating hole 221 is provided on the inner wall of the membrane suction port 22. An annular reinforcement part 232 is provided on the negative pressure membrane assembly 23. The annular reinforcement part 232 is inside the floating hole 221. A liquid inlet reserved part 223 is also provided on the front and rear sides of the inner wall of the membrane suction port 22. The surface of the membrane assembly 231 contacts the inner wall of the liquid inlet reserved part 223.

[0044] The negative pressure membrane assembly 23 includes a membrane assembly 231, which is flat. The membrane assembly 231 located on the inner side of the annular reinforcement part 232 is hard. The membrane assembly 231 also has a negative pressure closing membrane 2311 that blocks the membrane suction port 22. The inner wall of the membrane assembly 231 is provided with an annular hard part 233, and a circular opening 2331 is provided in the center of the annular hard part 233.

[0045] There is a concave portion between the reserved portion 24 and the film suction port 22, and the annular film pressing 222 is used to fill the concave portion.

[0046] When the liquid medicine is sucked, when the position of the first-level negative pressure lock 4 generates a suction force, the first-level negative pressure lock 4 opens the channel, and the internal airflow is outward. At the same time, the first-level negative pressure lock 4 can pull the annular hard part 233 outward, and then the annular hard part 233 will cause the membrane assembly 231 to move. When the annular reinforcement part 232 moves in the floating hole 221, the membrane assembly 231 is out of contact with the inner wall of the liquid inlet reserved part 223. In this way, the liquid inlet reserved part 223 will open the liquid inlet channel, and the liquid enters from the liquid inlet reserved part 223. Since the reserved part 24 is set, its caliber is small, so the airflow is generated quickly, and the negative pressure membrane assembly 23 can be opened with the assistance of the airflow. The setting of the annular pressing membrane 222 can avoid the annular hard part 233 and the concave part from forming a suction cup effect when the negative pressure membrane assembly 23 moves to the position of the annular pressing membrane 222. When the annular hard part 233 is close to the annular pressing membrane 222, the effect of the gas in the annular pressing membrane 222 and the irregular contact force generated can avoid adsorption together.

[0047] In addition, since the shape of the negative pressure membrane assembly 23 is bulging outward under normal conditions, the membrane assembly 231 can always block the liquid inlet reserved part 223 while keeping the membrane suction port 22 in a sealed state to avoid backflow of medicine. It also opens with external pressure and responds more quickly.

[0048] The primary negative pressure lock 4 includes a port 41 fixed to the inner wall of the needle tube 2, and a suction membrane 42 sleeved in the port 41, two connecting strips 43 are arranged on the top of the suction membrane 42, and a protruding block 44 is arranged on the connecting strip 43, and a ring protrusion 44-1 matching the protruding block 44 is arranged in the needle tube 2.

[0049] During the suction process, a negative pressure state is first generated, and the suction membrane 42 in the port 41 will be out of contact with the port 41. In this way, when the suction membrane 42 moves downward, the connecting strip 43 drives the annular hard portion 233 to move. At this time, the protruding block 44 on the connecting strip 43 contacts the annular protrusion 44-1 and then displaces radially. At this time, under the action of suction and guidance, the negative pressure membrane assembly 23 can be more conveniently moved from the membrane suction port 22. When the negative pressure membrane assembly 23 fully opens the membrane suction port 22, the protruding block 44 is located obliquely above the annular protrusion 44-1. The purpose of this setting is that when the suction force is lost, the arc surface also facilitates the resetting of the protruding block 44, so as to completely seal the membrane suction port 22.

[0050] The needle tube 2 is also provided with a locking groove 25 .

[0051] The setting of the locking groove 25 allows the position of the rubber stopper in the needle tube 2 to be observed when the needle tube 2 is inserted into the rubber stopper, thereby judging whether the needle tube 2 is inserted in place. At this time, the membrane suction port 22 is just located on the inner side of the rubber stopper, thereby providing a better measurement standard when sucking the medicine liquid, that is, the medicine liquid can be completely sucked out of the bottle.

[0052] It also includes a pressure control component 3, which includes a damping sleeve 31. A rod body 33 is arranged through the damping sleeve 31. A suction cup membrane 35 is fixedly connected to the top of the rod body 33. A piston 34 is arranged at the bottom of the rod body 33. An open channel 32 is also arranged in the needle tube 2. The piston 34 is sleeved in the open channel 32.

[0053] The setting of the voltage control component 3 has the following effects:

[0054] When the liquid is sucked, after the needle tube 2 is inserted into the bottle, the internal liquid enters the pressure control component 3 from the connecting hole F, and is injected between the damping sleeve 31 and the suction cup membrane 35. In this way, under the action of the pressure chamber P, the pressure control component 3 can be kept Figure 6 In this way, when suction is performed, it is ensured that the negative pressure membrane assembly 23 is opened first when negative pressure is generated;

[0055] Reducing the space in the inner cavity of the needle tube 2 ensures that less air enters the syringe during the suction process, and the pressure chamber P is at a negative pressure.

[0056] There are two connecting holes F, which form a connecting state when inserted. After the medicine enters the interior, it forms an adsorption state with the suction cup membrane 35. When the liquid level is higher than the needle tube 2, the internal liquid can prevent the piston 34 from moving during suction. When the liquid level drops, the connecting hole F can discharge the liquid, thereby reducing the internal resistance. Therefore, during the suction process, after the internal air pressure decreases, the external suction force increases, which can move the suction cup membrane 35 downward, thereby increasing the resistance, thereby ensuring that the membrane suction port 22 is in a fully open state.

[0057] A syringe comprises a Y-shaped infusion tube 7, which is connected to two injection syringes 6. A puncture needle 9 is arranged at the end of the Y-shaped infusion tube 7. A strap 8 for tying to a patient's arm is arranged on the Y-shaped infusion tube 7 to prevent the Y-shaped infusion tube 7 from moving, which would cause the puncture needle 9 to move and cause injury to the patient.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure contrast injection system assembly, comprising a needle assembly (1), wherein a pressure plate is provided at the bottom end of the needle assembly (1), characterized in that: The needle assembly (1) comprises a needle tube (2), the needle tube (2) having a needle tip portion (21), and two membrane suction ports (22) arranged above the pressure plate, a negative pressure membrane assembly (23) being arranged in the membrane suction ports (22), and a reserved portion (24) being reserved in the membrane suction ports (22); It also includes a primary negative pressure lock (4), which is located below the inner cavity of the needle tube (2). The primary negative pressure lock (4) has two parts connected to the negative pressure membrane assembly (23), and when negative pressure is generated below, the primary negative pressure lock (4) can open the communication channel.

2. A high-pressure contrast injector system assembly according to claim 1, characterized in that: The membrane suction port (22) is in the shape of a bowl, the inner wall of the membrane suction port (22) is provided with a floating hole (221), the negative pressure membrane assembly (23) is provided with an annular reinforcement portion (232), the annular reinforcement portion (232) is inside the floating hole (221), the front and rear sides of the inner wall of the membrane suction port (22) are also provided with a liquid inlet reserved portion (223), and the surface of the membrane assembly (231) is in contact with the inner wall of the liquid inlet reserved portion (223); The negative pressure membrane assembly (23) includes a membrane assembly (231), the membrane assembly (231) is flat, the membrane assembly (231) located on the inner side of the annular reinforcement part (232) is hard, the membrane assembly (231) also has a negative pressure closing membrane (2311) that blocks the membrane suction port (22), the inner wall of the membrane assembly (231) is provided with an annular hard part (233), and the center of the annular hard part (233) is provided with a circular opening (2331).

3. A high pressure contrast injector system assembly according to claim 2, characterized in that: There is a concave portion between the reserved portion (24) and the film suction port (22), and the annular pressing film (222) is used to fill the concave portion.

4. A high pressure contrast injector system assembly according to claim 3, characterized in that: The primary negative pressure lock (4) comprises a counter-port (41) fixed to the inner wall of the needle tube (2), and a suction membrane (42) sleeved in the counter-port (41), two connecting strips (43) are arranged on the top of the suction membrane (42), a protruding block (44) is arranged on the connecting strip (43), and a ring protrusion (44-1) matching the protruding block (44) is arranged in the needle tube (2).

5. A high pressure contrast injector system assembly according to claim 4, characterized in that: The needle tube (2) is also provided with a locking groove (25). The locking groove (25) is arranged so that when the needle tube (2) is inserted into the rubber stopper, the position of the rubber stopper in the needle tube (2) can be observed, thereby judging whether the needle tube (2) is inserted in place. At this time, the membrane suction port (22) is just located on the inner side of the rubber stopper, thereby providing a better measurement standard when sucking the liquid medicine, that is, the liquid medicine can be completely sucked out of the bottle.

6. A high-pressure contrast injector system assembly according to claim 5, characterized in that: The invention also comprises a pressure control component (3), wherein the pressure control component (3) comprises a damping sleeve (31), wherein a rod body (33) is provided through the damping sleeve (31), a suction cup membrane (35) is fixedly connected to the top of the rod body (33), a piston 1 (34) is provided at the bottom of the rod body (33), and an open channel (32) is also provided in the needle tube (2), and the piston 1 (34) is sleeved in the open channel (32).

7. A syringe, applied to a high-pressure contrast injection system assembly as claimed in any one of claims 1 to 6, characterized in that: The invention comprises a Y-shaped infusion tube (7), wherein the Y-shaped infusion tube (7) is connected to two injection syringes (6), a puncture needle (9) is arranged at the end of the Y-shaped infusion tube (7), and a bandage (8) for tying on the patient's arm is arranged on the Y-shaped infusion tube (7).

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