Syringe holder and contrast medium injection apparatus

Abstract

The application discloses a syringe fixing device and a contrast medium injection equipment, wherein the syringe fixing device comprises a syringe assembly, a shell, a first detection assembly, a second detection assembly and a third detection device; the syringe assembly comprises a syringe body; the shell is provided with a first through hole with a diameter larger than that of the syringe body; the shell and the syringe assembly can rotate relative to each other; the first detection assembly is used for detecting whether the syringe assembly is rotated to a first preset position; the second detection assembly is used for detecting whether the syringe assembly is rotated to a second preset position; and the third detection device is used for detecting whether the abutting piece reaches a third preset position.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment, in particular to a syringe fixing device and a contrast medium injection device. BACKGROUND

[0002] At present, when the syringe of the contrast medium injection device is rotated to be mounted or dismounted, it is necessary to manually confirm whether the mounting or dismounting is in place, and the push rod is manually pushed to the piston and fixed. The whole process needs to be confirmed manually. The manual detection operation is not only prone to error, but also quite time-consuming, which increases the queuing time of patient examination. SUMMARY

[0003] The main purpose of the present application is to provide a syringe fixing device, which aims to reduce the manual steps before and after the injection of the contrast medium injection device, in particular the manual operation of confirming that the needle cylinder is mounted or dismounted and the piston is in place before and after the injection of the contrast medium, so as to reduce the operation error rate and the queuing time of patient examination.

[0004] To achieve the above purpose, the syringe fixing device provided by the present application comprises:

[0005] a driving device;

[0006] a needle cylinder assembly comprising a needle cylinder body and a piston, the piston being arranged inside the needle cylinder body;

[0007] a housing, the housing being provided with a first through hole with a diameter larger than that of the needle cylinder body, and the needle cylinder assembly and the housing being relatively rotatable;

[0008] a push rod, one end of the push rod being fixedly connected with the piston, and the one end of the push rod being provided with an abutting piece for abutting against the piston, the abutting piece being movable relative to the push rod, and the other end of the push rod being in transmission connection with the driving device;

[0009] a first detection assembly comprising a first detection device, the first detection device being used for detecting whether the needle cylinder assembly is rotated to a first preset position; and / or,

[0010] a second detection assembly comprising a second detection device, the second detection device being used for detecting whether the needle cylinder assembly is rotated to a second preset position; and / or,

[0011] a third detection device for detecting whether the abutting piece reaches a third preset position;

[0012] The first detection device, the second detection device and the third detection device are all in electrical connection with the driving device.

[0013] Preferably, one end of the push rod is provided with a protrusion, the tail of the piston is provided with a claw and an elastic element, the claw is provided with a terminal end, the terminal end is connected with the elastic element, and the claw is clamped with the protrusion.

[0014] Preferably, the piston comprises two claws and the elastic element comprises elastic plastic or elastic sheets.

[0015] The abutting element is provided with an elastic shoulder, the top of one end of the push rod is provided with a containing groove for containing one end of the abutting element, the one end of the abutting element faces away from the needle cylinder assembly, the abutting element has a distance from the groove bottom of the containing groove, and the elastic shoulder abuts the groove mouth periphery of the containing groove.

[0016] Preferably, a support is arranged between the two claws, and the support is used for abutting with the abutting element.

[0017] The abutting element and the elastic shoulder are both made of silica gel.

[0018] Preferably, the shell further comprises a rotating disc, and the rotating disc is used for fixedly connecting the bottom of the needle cylinder body.

[0019] The rotating disc is provided with a second through hole, and the push rod is sleeved in the second through hole.

[0020] Preferably, the first detection assembly further comprises a first element, the first detection device is used for detecting the position of the first element, the second detection assembly further comprises a second element, the second detection device is used for detecting the position of the second element, and the first element and the second element are arranged on the needle cylinder body or the rotating disc.

[0021] Preferably, the first detection device and the second detection device are both Hall elements, and the first element and the second element are both magnets.

[0022] The maximum rotation angle of the first element is greater than or equal to 40° and less than or equal to 100°, the maximum rotation angle of the second element is greater than or equal to 40° and less than or equal to 100°, and the second element has an opposite rotation direction to the first element.

[0023] Preferably, the third detection device is a photoelectric detection device.

[0024] Preferably, the injector fixing device comprises two needle cylinder assemblies, two push rods, two first detection assemblies, two second detection assemblies and two third detection devices.

[0025] The application further provides a contrast agent injection device, which comprises the above-mentioned injector fixing device.

[0026] The technical scheme of the present application is provided with a driving device, a needle cylinder assembly, a shell, a push rod, a first detection assembly, a second detection assembly, a third detection device, the needle cylinder assembly includes a needle cylinder body and a piston, the piston is arranged inside the needle cylinder body, the shell is provided with a first through hole with a diameter larger than that of the needle cylinder body, the needle cylinder assembly is rotatable relative to the shell, one end of the push rod is fixedly connected with the piston, and the one end of the push rod is provided with an abutting piece abutting against the piston, the abutting piece is movable relative to the push rod, the other end of the push rod is in transmission connection with the driving device, the first detection assembly includes a first detection device, the first detection device is used for detecting whether the needle cylinder assembly reaches a preset position, the second detection assembly includes a second detection device, the second detection device is used for detecting whether the needle cylinder body reaches a preset position, the third detection device is used for detecting whether the abutting piece reaches a preset position, the first detection device, the second detection device and the third detection device are electrically connected with the driving device. When the needle cylinder is installed, the needle cylinder assembly is rotated to a preset position and detected by the first detection device, the driving device can be started according to the detection signal of the first detection device to drive the push rod to move in the direction of the piston, in the process of pushing, the push rod is in contact with and fixedly connected with the piston, the piston is continuously pushed, the static friction force generated between the piston and the inner wall of the needle cylinder body makes the piston blocked, the abutting piece is thus extruded to move in the direction away from the piston, and is detected by the third detection device, the driving device can be stopped according to the detection signal of the third detection device, at this time, the push rod has been moved to the position, and the user can start to inject or extract the medicament; after the injection is completed, the needle cylinder body is manually rotated and the needle cylinder assembly is detected by the second detection device to rotate to a preset position, the driving device can be started according to the detection signal of the second detection device, and drives the push rod to return in the direction away from the piston. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0028] Figure 1 It is an internal structure schematic view of an embodiment of the present application syringe fixing device.

[0029] Figure 2 It is an external style schematic view of an embodiment of the present application syringe fixing device.

[0030] Figure 3 It is a position schematic view of the first detection device and the second detection device in an embodiment of the present application syringe fixing device.

[0031] Figure 4 Figure 6 is a schematic view of a push rod structure of an embodiment of the syringe fixing device of the present application.

[0032] Figure 5 Figure 7 is a schematic view of a syringe assembly structure of an embodiment of the syringe fixing device of the present application.

[0033] Figure 6 Figure 8 is a schematic view of a piston structure of an embodiment of the syringe fixing device of the present application.

[0034] Figure 7 Figure 9 is a schematic view of a rotating disc one angle structure of an embodiment of the syringe fixing device of the present application.

[0035] Figure 8 Figure 10 is a schematic view of a rotating disc another angle structure of an embodiment of the syringe fixing device of the present application.

[0036] BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Reference Name Reference Name 1 Needle cylinder assembly 3 First detection device 11 Needle cylinder body 31 First element 12 Fastener 4 Second detection device 13 Piston 41 Second element 131 Claw piece 5 Third detection device 132 Elastic piece 6 Push rod 133 Support piece 61 Accommodating groove 2 Housing 62 Convex part 21 First through hole 63 Abutting piece 22 Rotating disc 631 Elastic shoulder 221 Circular groove 632 Kit 222 Arc-shaped groove 633 Metal sheet 223 Second through hole

[0038] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0041] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0042] The present application proposes a syringe fixing device.

[0043] Reference Figures 1 to 4In an embodiment of the present application, the syringe fixing device comprises a driving device, a needle cylinder assembly 1, a shell 2, a push rod 6, a first detection assembly, a second detection assembly and a third detection device 5. The driving device can be arranged inside or outside the shell. The needle cylinder assembly 1 comprises a needle cylinder body 11 with a piston 13 arranged inside. The shell 2 has a supporting function and is provided with a first through hole 21 with a diameter larger than that of the needle cylinder body 11, so that the needle cylinder body 11 can be smoothly installed in the shell 2 by passing through the first through hole 21, and at the same time, the needle cylinder assembly 1 can rotate relative to the shell 2 when it is sleeved on the first through hole 21. One end of the push rod 6 is used for fixed connection with the piston 13, and the other end of the push rod 6 is provided with an abutting piece 63 for abutting against the piston 13. The abutting piece 63 is movable relative to the push rod 6. The other end of the push rod 6 is in transmission connection with the driving device. The driving device can drive the push rod 6 to move back and forth, including providing a pushing force for the push rod 6 to push to the piston 13 to connect the two, so that the push rod 6 can be smoothly fixed with the piston 13. In order to shorten the operation steps, save the queuing time of patient examination and reduce the error probability of manual operation, the first detection assembly, and / or the second detection assembly, and / or the third detection device 5 are arranged, and the first detection assembly, and / or the second detection assembly, and / or the third detection device 5 are electrically connected with the driving device.The first detection assembly comprises the first detection device 3, and the second detection assembly comprises the second detection device 4. In the above embodiment, the relative rotation between the needle cylinder assembly 1 and the shell 2 serves as an operation signal for confirming that the needle cylinder body 11 is completely installed in the syringe fixing device. The first detection device 3 is used for detecting whether the needle cylinder assembly 1 is rotated to the first preset position. When the needle cylinder assembly 1 is installed in the shell 2 and is rotated to the first preset position in the shell 2, the first detection device 3 detects a signal that a certain part of the needle cylinder assembly 1 is present, which indicates that the needle cylinder body 11 has been installed in place. The driving device can be started according to the detection signal of the first detection device 3, so as to drive the push rod 6 to move towards the piston 13 and make the abutting piece 63 contact with the piston 13. The piston 13 is connected with the push rod 6, and continues to move forward. The static friction force generated between the piston 13 and the inner wall of the needle cylinder body 11 makes the piston 13 move forward with resistance. The supporting force of the push rod 6 on the abutting piece 63 is smaller than the above resistance. After the abutting piece 63 is extruded, the abutting piece 63 moves in the direction away from the piston 13. The third detection device 5 is used for detecting whether the abutting piece 63 reaches the third preset position. When the third detection device 5 detects a signal that the abutting piece 63 is present, the driving device can be stopped according to the detection signal of the third detection device 5, which represents that the push rod 6 has been moved in place and the piston 13 has been completely connected with the push rod 6. At this time, the operator can perform the injection operation or extract the medicament. The second detection device 4 is used for detecting whether the needle cylinder assembly 1 is rotated to the second preset position. When the needle cylinder assembly 1 is rotated to the second preset position in the shell 2, the first detection device 3 detects a signal that a certain part of the needle cylinder assembly 1 is present, which indicates that the needle cylinder body 11 has been in the dismounting state. The driving device can be started according to the detection signal of the second detection device 4, so as to drive the push rod 6 to move towards the direction away from the piston 13. In another embodiment, the present application further comprises a fourth detection device. The fourth detection device is used for detecting whether the abutting piece 63 reaches the fourth preset position. The fourth detection device is farther away from the abutting piece 63 than the third detection device 5. The fourth detection device is electrically connected with the driving device. When the system is set to access the 200ml syringe, the third detection device 5 detects the piston 13 and makes the driving device stop. The stop signal is also transmitted to the system. The system sends a preset shutdown signal to the third detection device 5 and a preset start signal to the driving device, so as to make the third detection device 5 shut down and the driving device start again. The driving device continues to drive the push rod to push the piston. When the piston 13 advances to the top of the needle cylinder body 11, the piston 13 is subjected to greater resistance, so that the abutting piece 63 moves in the direction away from the piston 13 by a greater distance and is detected by the fourth detection device. The fourth detection device sends a preset stop signal to the driving device, so as to make the driving device stop. The fourth detection device is provided as an optical detection device.

[0044] With reference to Figures 4 to 6, in order to make the push rod 6 and the piston 13 more convenient, the end of the push rod 6 is provided with a convex part 62, and the tail of the piston 13 is provided with a claw piece 131 and a elastic piece 132, the claw piece 131 is used for clamping with the convex part 62, the end of the claw piece 131 is connected with the elastic piece 132, the elastic piece 132 can provide elastic pulling force for the claw piece 131, so that the claw piece 131 can be buckled or separated from the convex part 62, in an embodiment, the piston 13 includes two claw pieces 131, the elastic piece 132 is connected between the ends of the two claw pieces 131, and the elastic piece 132 includes one of elastic plastic or elastic sheet. Further, in order to reduce the damage in the opening and closing process of the claw piece 131, a sleeve 632 can be arranged between the end of the push rod 6 and the piston 13, the sleeve 632 covers the convex part and the abutting piece 63, and has the same protruding part, the part of the sleeve 632 towards the piston 13 is fixed with a metal sheet 633, the center of the metal sheet 633 has a bending part towards the piston 13, in the process of pushing the push rod 6, the claw piece 131 can gradually open along the metal sheet 633 and buckle the convex part 62, and when it is separated from the convex part 62, it can also gradually return to the original position along the metal sheet 633, thereby increasing the service life of the claw piece 131 and the elastic piece 132. On the other hand, in order to reduce the damage of the claw piece 131 due to excessive pushing of the push rod 6, the claw piece 131 is provided with a support piece 133 between the claw pieces 131, the support piece 133 is used for abutting with the abutting piece 63, the height of the support piece 133 is lower than the height of the clamping part of the claw piece 131, and the support piece 133 is made of plastic.

[0045] Referring to Figure 1 , Figure 4 In an embodiment, the top of the end of the push rod 6 is provided with a containing groove 61 for containing the abutting piece 63 away from the end of the needle cylinder assembly 1, so that the abutting piece 63 occupies less space in the whole internal structure, the abutting piece 63 has a distance with the groove bottom of the containing groove 61, so that the abutting piece 63 has space to move in the push rod 6, and the third detection device 5 is placed in the space of the distance, the abutting piece 63 is provided with an elastic shoulder 631, the elastic shoulder 631 abuts the groove side of the containing groove 61, when the piston 13 is fixed, the continuous pushing of the push rod 6 makes the abutting piece 63 move away from the piston 13, the elastic shoulder 631 is pulled and compressed by the abutting piece 63, the third detection device 5 detects the abutting piece 63 and sends a preset stop signal, the driving device stops running according to the detection signal of the third detection device 5, which represents that the installation of the push rod 6 and the piston 13 is completed, in order to be accurate, the third detection device 5 is an optical detection device; when the claw piece 131 of the piston 13 is separated from the push rod 6, the abutting piece 63 is no longer subjected to the extrusion force, the elastic shoulder 631 restores to the original state due to the lack of pulling force, and pulls the abutting piece 63 back to the original position. Further, in order to facilitate replacement, the abutting piece 63 and the elastic shoulder 631 are integrated silicone.

[0046] Reference Figure 5 , Figures 7 to 8 In order to facilitate the fixing of the needle cylinder body 11, the shell 2 further comprises a rotating disc 22, which is used to fixedly connect the bottom of the needle cylinder body 11. The outer side of the needle cylinder body 11 is provided with a fastener 12. The middle part of at least one side of the rotating disc 22 is provided with a sunken groove. The middle part of the sunken groove is a circular groove 221. The diameter of the circular groove 221 is at least equal to the diameter of the bottom of the needle cylinder body 11. The outer side of the circular groove 221 is further provided with an arc-shaped groove 222 which cooperates with the fastener 12. The side of the rotating disc 22 which has the sunken groove is arranged opposite to the first through hole 21. The interior of the shell 2 is provided with a rotating disc 22 support 133 which is used to support the rotating disc 22. The rotating disc 22 support 133 is provided with a wall part around the circumferential side of the rotating disc 22. The top of the wall part is connected to the edge of the first through hole 21. The part of the wall part between the first through hole 21 and the rotating disc 22 is provided with a limiting part. The limiting part extends towards the direction perpendicular to the axis of the rotating disc 22. The extension distance of the limiting part is at most the distance that can touch the outer wall of the needle cylinder body 11. This enables the needle cylinder body 11 to enter the circular groove 221 of the rotating disc 22 from the first through hole 21 and through the limiting part. In order to stabilize the connection between the needle cylinder assembly 1 and the rotating disc 22, the needle cylinder body 11 comprises two fasteners 12 which are symmetrically arranged on the needle cylinder body 11. Similarly, the rotating disc 22 comprises two arc-shaped grooves 222 which are symmetrically arranged on the circular groove 221. The center of the rotating disc 22 is provided with a second through hole 223. The push rod 6 is sleeved on the second through hole 223 through the rotating disc 22 support 133. The rotating disc 22 can rotate relative to the push rod 6.

[0047] Reference Figure 1 , Figure 3 , Figure 6 , Figure 8, the first detection device 3 is used for detecting the position of the first element 31, the second detection device 4 is used for detecting the position of the second element 41, and the first element 31 and the second element 41 are arranged on the needle cylinder body 11 or the rotating disc 22. Since the needle cylinder body 11 needs to be frequently replaced, in the embodiment, the first element 31 and the second element 41 are arranged on the rotating disc 22 and are symmetrically arranged. The first detection device 3 and the second detection device 4 are both arranged as Hall elements, the first element 31 and the second element 41 are both arranged as magnets, when the magnets rotate to the preset positions, the Hall elements output preset signals after detecting the magnetic force, and similarly, the light coupling detection device combination or the mechanical switch combination can also be replaced. In an embodiment, the outer side of the rotating disc 22 is further fixed with a sliding block, the wall portion is provided with a sliding rail corresponding to the sliding block, the rotating directions of the first element and the second element are opposite, the arc length of the sliding rail corresponds to an angle of 180°, so that the maximum rotating angles of the first element 31 and the second element 41 are both arranged as 90°, when an operator visually looks down from the top of the needle cylinder body 11, the rotating direction of the first element 31 is clockwise, and the rotating direction of the second element 41 is counterclockwise. After the needle cylinder assembly 1 is clamped into the rotating disc 22 from the first through hole 21, the operator rotates the needle cylinder body 11, when the first detection device 3 detects the first element 31, it represents that the needle cylinder body 11 has been successfully rotated clockwise to the first preset position, at this time, the first detection device 3 sends a preset starting signal, the driving device is started according to the signal of the first detection device 3, and the driving push rod 6 is connected with the piston 13; similarly, when the second detection device 4 detects the second element 41, it represents that the needle cylinder body 11 has been successfully rotated counterclockwise to the second preset position, at this time, the operator can disassemble the needle cylinder body 11, meanwhile, the second detection device 4 sends a preset starting signal, the driving device is started according to the signal of the second detection device 4, and the driving push rod 6 moves in the direction away from the piston 13 to prepare for the next injection, and further, in an embodiment, a rotary encoder and a linear displacement sensor are added, the rotary encoder is used for recording the number of rotations of the driving device, the linear displacement sensor is used for measuring the moving distance of the push rod 6, and the two are combined to accurately measure the actual moving distance of the push rod 6.

[0048] Further, the injector fixing device comprises two needle cylinder assemblies 1, two push rods 6, two first detection assemblies, two second detection assemblies and two third detection devices 5, so as to facilitate the simultaneous injection of different medicaments.

[0049] The application further provides a contrast agent injection device, which comprises the injector fixing device, and the specific structure of the injector fixing device is the same as that of the above-mentioned embodiments. Since the contrast agent injection device adopts all the technical solutions of the above-mentioned embodiments, at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are achieved, and details are not repeated here.

[0050] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, made under the technical concept of the present application, using the content of the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. A syringe securing device, characterized in that, The utility model relates to a syringe assembly and a driving device thereof, and more particularly to a syringe assembly and a driving device thereof. The utility model discloses a syringe assembly and a driving device thereof, comprising: a driving device; a syringe assembly comprising a syringe body and a piston arranged inside the syringe body; a housing provided with a first through hole having a diameter greater than that of the syringe body, the syringe assembly being rotatable relative to the housing; a push rod having one end fixedly connected to the piston and provided with an abutting member for abutting against the piston, the abutting member being movable relative to the push rod, the other end of the push rod being in transmission connection with the driving device; a first detection assembly comprising a first detection device for detecting whether the syringe assembly is rotated to a first preset position; a second detection assembly comprising a second detection device for detecting whether the syringe assembly is rotated to a second preset position; a third detection device for detecting whether the abutting member reaches a third preset position; the first detection device, the second detection device and the third detection device are electrically connected to the driving device; 2. The syringe securement device of claim 1, wherein the top of one end of the push rod is provided with a receiving groove for receiving one end of the abutting member, the one end of the abutting member facing away from the syringe assembly, the abutting member and the groove bottom of the receiving groove having a distance therebetween, the abutting member having a space capable of moving in the push rod, and the third detection device being arranged in the space of the distance; the third detection device sends a preset stop signal after detecting the abutting member, and the driving device stops running according to the detection signal of the third detection device, representing that the installation of the push rod and the piston has been completed.

3. The syringe securement device of claim 2, wherein the periphery of one end of the push rod is provided with a convex portion, the tail of the piston is provided with a claw member and an elastic member, the claw member is provided with a terminal end connected to the elastic member, and the claw member is clamped with the convex portion. the piston comprises two claw members, and the elastic member comprises a spring piece; 4. The syringe securement device of claim 3, wherein the abutting member is provided with an elastic shoulder portion abutting against the groove opening periphery of the receiving groove. a support member is arranged between the two claw members for abutting against the abutting member; 5. The syringe securement device of claim 1, wherein the abutting member and the elastic shoulder portion are both made of silica gel. the housing further comprises a rotating disc for fixedly connecting the bottom of the syringe body; 6. The syringe securement device of claim 5, wherein the rotating disc is provided with a second through hole, and the push rod is sleeved in the second through hole.

7. The syringe securement device of claim 6, wherein the first detection assembly further comprises a first element, and the first detection device is used for detecting the position of the first element; the second detection assembly further comprises a second element, and the second detection device is used for detecting the position of the second element; the first element and the second element are arranged on the syringe body or the rotating disc. the first detection device and the second detection device are both Hall elements, and the first element and the second element are both magnets; 8. The syringe securement device of claim 1, wherein, the maximum rotation angle of the first element is greater than or equal to 40° and less than or equal to 100°, the maximum rotation angle of the second element is greater than or equal to 40° and less than or equal to 100°, and the second element has an opposite rotation direction to the first element. the third detection device is a photoelectric detection device.

9. The syringe securement device of claim 1, wherein, The syringe fixing device comprises two needle cylinder assemblies, two push rods, two first detection assemblies, two second detection assemblies, and two third detection devices.

10. A contrast media injection apparatus characterized by, The syringe fixing device comprises two needle cylinder assemblies, two push rods, two first detection assemblies, two second detection assemblies, and two third detection devices.

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