Cardioangiographic injection device for minimally invasive interventions

Abstract

The present application relates to injection device technical field, disclose a kind of cardiovascular angiography injection device for minimally invasive intervention method, including injection cylinder, its one end is provided with connector, the connector and the inside of injection cylinder are communicated.The present application pressure head and lamella contact, will press lamella and bend deformation to the direction of the inside of injection cylinder, by lamella drive top head to the inside movement of injection cylinder, so that top head drives protrusion and press into the inside of pit, at this time, by the protrusion of top head and the cooperation of pit, the position of piston shaft can be limited, when injection device is not used, so that piston avoids being pushed or pulled, so as to avoid the contrast medium in the inside of injection cylinder being pushed out or the inside of injection cylinder inhaling air, ensure the safety of patient during angiography operation.

Description

Technical Field

[0001] This invention relates to the field of injection device technology, and more particularly to a cardiovascular angiography injection device for minimally invasive interventional procedures. Background Technology

[0002] The incidence of cardiovascular diseases is rising, leading to an increasing demand for cardiovascular angiography. To improve diagnostic accuracy and efficiency, clinicians require more advanced and precise cardiovascular angiography injection devices. For example, in coronary angiography, precise control of the injection rate and dosage of contrast agent is needed to clearly visualize the degree of stenosis and the location of lesions in the coronary arteries; in interventional procedures, the injection device also needs to accurately deliver embolic materials or drugs to the lesion site while ensuring the safety and accuracy of the procedure.

[0003] When using existing contrast injection syringes, the user frequently and intermittently pushes the piston shaft, causing the piston shaft to compress the contrast fluid and deliver it to the cardiovascular area. When the contrast injection syringe is not in use and is placed in a certain position, medical staff can easily accidentally touch the piston rod, or due to changes in hydraulic pressure, the piston shaft may move inside the syringe, causing the piston shaft to slide against the inner wall of the syringe. This sliding of the piston against the inner wall of the syringe can lead to excessive contrast fluid being discharged into the patient's body, or the syringe drawing in air, which is then compressed into the patient's body, thus affecting the contrast imaging results and posing a risk to the patient's life. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cardiovascular angiography injection device for minimally invasive interventional procedures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cardiovascular angiography injection device for minimally invasive interventional procedures includes: an injection cylinder with a connector at one end, the connector being connected to the interior of the injection cylinder; a piston being slidably mounted on the inner wall of the injection cylinder; a piston shaft being fixedly connected to one end face of the piston; and a piston push-pull ring being fixedly connected to one end of the piston shaft for wearing on the user's thumb.

[0007] Two ring handles are symmetrically arranged on both sides of the syringe and are used to fit over the middle and index fingers of the user.

[0008] The piston shaft has at least a first state and a second state, wherein the first state is configured such that the piston shaft is restricted from moving relative to the syringe, and the second state is configured such that the piston shaft is allowed to move relative to the syringe.

[0009] As a further embodiment of the present invention, the piston shaft is in a first state when the ring handle is in a free state, and in a second state when the ring handle is in a force-applied state. A positioning component is provided between the ring handle and the piston shaft. Two second through holes are symmetrically opened on the outer surface of the injection cylinder. Part of the structure of the positioning component is installed inside the two second through holes. Two third through holes are symmetrically opened on the outer surface of the injection cylinder. The two third through holes are used for the installation between the positioning component and the injection cylinder.

[0010] As a further embodiment of the present invention, four reinforcing plates are uniformly arranged on the outer surface of the piston shaft, and a gap of 0.5 mm to 1.0 mm is provided between the four reinforcing plates and the inner wall of the injection cylinder. Multiple recesses are uniformly opened on the four reinforcing plates, and the recesses are used to cooperate with the first state of the positioning component.

[0011] As a further embodiment of the present invention, the positioning component includes: two supports, which are symmetrically arranged on both sides of the syringe barrel. Each of the two supports has a groove inside, and the two ring handles are respectively disposed inside the two grooves. An opening is provided through the support, and a thin sheet is fixedly connected inside the opening. The thin sheet is rectangular and does not completely cover the opening. Two first grooves are symmetrically formed on the outer surface of each of the two supports. The first groove is composed of circular grooves at both ends and an oblong groove in the middle. The diameter distance between the two circular grooves at the two ends of the first groove is greater than the width distance between the oblong grooves. The first groove is used for the installation of the two ring handles.

[0012] The top head is fixedly connected to the thin sheet and is located inside the injection cylinder. Multiple protrusions are equidistantly arranged on the top head. The top head passes through the second through hole, and the protrusions abut against the inner wall of the pit.

[0013] As a further embodiment of the present invention, a pressure head is fixedly installed at one end of the ring handle near the thin sheet. The pressure head is positioned above the thin sheet and is used to press down on the thin sheet to bend it. A spring plate is fixedly installed on the ring handle. The spring plate is positioned between the ring handle and the support and is used to support the ring handle to return to its original position. The other end of the spring plate abuts against the inner wall of the groove on the support. Two first rods are symmetrically arranged on the outer surface of the ring handle. The two first rods are respectively positioned between the inner walls of the two first grooves and slidably installed thereon. The ring handle rotates inside the first grooves via the first rods.

[0014] As a further embodiment of the present invention, the other end of each of the two ring handles is fixedly installed with a locking block, the outer surface of the two locking blocks is provided with a locking slot, and the outer circumferential surface of the syringe is symmetrically provided with two first through holes, the two locking blocks respectively pass through the two first through holes, wherein the two reinforcing pieces are respectively disposed between the inner walls of the two locking slots and slidably installed therewith.

[0015] As a further embodiment of the present invention, a second groove is provided on the outer surface of each of the two supports near the other end. The second groove is arranged in a fan shape. Two second rods are symmetrically arranged on the outer surface of the ring handle. The two second rods are respectively disposed between the inner walls of the two second grooves and slidably installed thereon. The ring handle restricts its rotation range through the second rods and the second grooves.

[0016] As a further embodiment of the present invention, the lower surfaces of the two supports are provided with anti-misbehavior blocks, the anti-misbehavior blocks are arranged in a triangular shape, and the third through hole is matched with the anti-misbehavior blocks.

[0017] When the pressure head of this application contacts the thin film, it will press the thin film to bend and deform towards the inside of the syringe. The thin film will drive the pressure head to move towards the inside of the syringe, so that the pressure head drives the protrusion to press into the inside of the recess. At this time, through the cooperation of the protrusion and the recess of the pressure head, the position of the piston shaft can be restricted. When the injection device is not in use, the piston is prevented from being pushed or pulled, thereby preventing the contrast fluid inside the syringe from being pushed out or air from being drawn into the syringe, ensuring the safety of the patient during the contrast procedure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0019] Figure 2 This is a cross-sectional schematic diagram of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0021] Figure 4 This is a schematic diagram of the piston shaft pushing state of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention;

[0022] Figure 5 This is a cross-sectional schematic diagram of the piston shaft pushing state of the cardiovascular angiography injection device for minimally invasive interventional methods proposed in this invention.

[0023] Figure 6 This is a schematic diagram of the piston shaft in the free state of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0024] Figure 7 This is a cross-sectional schematic diagram of the piston shaft in the free state of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0025] Figure 8This is a schematic diagram of the piston shaft pulling state of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0026] Figure 9 This is a cross-sectional schematic diagram of the piston shaft pulling state of the cardiovascular angiography injection device for minimally invasive interventional methods proposed in this invention.

[0027] Figure 10 This is a top view schematic diagram of the support of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0028] Figure 11 This is a schematic diagram of the ring handle of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed in this invention.

[0029] In the diagram: 1. Injector cylinder; 101. First through hole; 102. Second through hole; 103. Third through hole; 2. Piston shaft; 201. Recess; 3. Connector; 4. Piston push-pull ring; 5. Piston; 6. Ring handle; 601. First rod; 602. Second rod; 7. Support; 701. Anti-fool block; 702. First groove; 703. Second groove; 704. Opening; 8. Locking block; 801. Locking slot; 9. Press head; 10. Thin sheet; 11. Top head; 12. Spring plate. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figure 1 As shown, a cardiovascular angiography injection device for minimally invasive interventional procedures includes: an injection cylinder 1 for containing contrast fluid, a connector 3 for mounting an angiography injection tube, a piston 5 for pushing the contrast fluid, a piston shaft 2 for pushing the piston 5, a piston push-pull ring 4 and a ring handle 6 for moving the piston shaft 2.

[0032] like Figure 2 As shown, the syringe 1 is cylindrical with an internal cavity for containing contrast fluid. One end of the syringe 1 is connected to a connector 3, which is connected to the interior of the syringe 1. The syringe 1 is connected to the contrast injection tube through the connector 3 for the export and import of contrast fluid within the syringe 1 cavity. A piston 5 is slidably mounted on the inner wall of the syringe 1. The piston 5 is used to compress or expand the cavity of the syringe 1 by sliding. A piston shaft 2 is fixedly connected to one end face of the piston 5. The piston shaft 2 drives the piston 5 to slide within the cavity of the syringe 1. A piston push-pull ring 4 is fixedly connected to one end of the piston shaft 2 for wearing on the user's thumb. The user moves the piston shaft 2 by using the piston push-pull ring 4.

[0033] like Figure 2 and Figure 11 As shown, the two ring handles 6 are arranged in a circular shape, which makes it convenient for the user to insert their fingers and limit the fingers. The two ring handles 6 are symmetrically arranged on both sides of the syringe 1 and are used to fit the middle and index fingers of the user. This allows the user to form a stable triangular structure with the two ring handles 6 and the piston push-pull ring 4, which makes it easy to push and pull the piston push-pull ring 4 to drive the piston shaft 2 to move.

[0034] The piston shaft 2 has at least a first state and a second state. The first state is defined as the piston shaft 2 being restricted from moving relative to the syringe barrel 1. When the ring handle 6 is in a free state, i.e., when the user is not using the injection device and has placed it in a certain position, the ring handle 6 is not subjected to any force from the fingers. Specifically, a positioning component is provided between the ring handle 6 and the piston shaft 2. Because the piston shaft 2 is in a free-moving axial state when the injection device is not in use, the positioning component limits its position and prevents it from moving freely axially. Figure 3 As shown, two second through holes 102 are symmetrically opened on the outer surface of the injection cylinder 1, so that part of the positioning component passes through the two second through holes 102 and contacts the surface of the piston shaft 2. Four reinforcing plates are evenly arranged on the outer surface of the piston shaft 2, which is the prior art, and are used to strengthen the piston shaft 2 to prevent it from bending under force. Multiple recesses 201 are evenly opened on the four reinforcing plates. When the piston shaft 2 is in the first state, the part of the positioning component that passes through the second through hole 102 will be inserted into the interior of the recess 201, thereby restricting the axial free movement of the piston shaft 2.

[0035] like Figure 2 and Figure 3 As shown, the positioning assembly includes: two supports 7 with a U-shaped cross-section, symmetrically arranged on both sides of the syringe 1. Each support 7 has a groove inside, and two ring handles 6 are respectively disposed inside the two grooves and rotatably connected to the supports 7. Figure 6 and Figure 10 As shown, an opening 704 is provided through the support 7. A rectangular sheet 10 is fixedly connected inside the opening 704. The two sides of the sheet 10 are fixedly connected to the two ends of the opening 704 along its length, making the sheet 10 and the support 7 integrally formed. The sheet 10 does not completely cover the opening 704, so that the two sides of the sheet 10 along its length form a gap with the inner wall of the opening 704, allowing the sheet 10 to bend normally under force. Figure 6 and Figure 7As shown, two first grooves 702 are symmetrically formed on the outer surfaces of both supports 7. Each first groove 702 consists of circular grooves at both ends and an oblong groove in the middle. The diameter distance between the circular grooves at both ends of the first groove 702 is greater than the width distance between the oblong grooves. The first groove 702 is used for the installation of the two ring handles 6, as shown. Figure 6 , Figure 7 and Figure 11 As shown, two first rods 601 are symmetrically arranged on the outer surface of the ring handle 6. The two first rods 601 and the ring handle 6 are integrally formed. The two first rods 601 are respectively disposed inside the two first grooves 702 and are slidably installed with the inner wall of the first groove 702. Through the sliding installation, the first rods 601 can switch positions between the two circular grooves at their two ends through the waist-shaped groove in the middle of the first groove 702. When the first rod 601 is slidably switched to either of the two circular grooves of the first groove 702, the ring handle 6 can rotate through the first rod 601 inside the two circular grooves of the first groove 702. Figure 7 and Figure 11 As shown, a spring plate 12 is fixedly installed on the ring handle 6. The spring plate 12 is made of elastic material and has the ability to deform elastically. The spring plate 12 is located between the ring handle 6 and the support 7. The other end of the spring plate 12 abuts against the inner wall of the groove on the support 7. When the ring handle 6 is in a free state and is not under force, the elastic force of the spring plate 12 causes the ring handle 6 to rotate around the first rod 601 away from the syringe barrel 1, thereby driving the remaining components in the positioning assembly to limit the piston shaft 2. Figure 7 and Figure 11 As shown, a pressure head 9 is fixedly installed at one end of the ring handle 6 near the thin sheet 10. The ring handle 6, the spring sheet 12 and the pressure head 9 are integrally formed. The pressure head 9 is located above the thin sheet 10 and is used to press down on the thin sheet 10 to make it bend.

[0036] like Figure 6 and Figure 7 As shown, the top head 11 is fixedly connected to the thin sheet 10. The top head 11 is located inside the injection cylinder 1. Multiple protrusions are equidistantly arranged on the top head 11. The top head 11 passes through the second through hole 102, and the protrusions abut against the inner wall of the pit 201.

[0037] When the injection device is not in use, i.e., when the piston shaft 2 is in the first state, the two ring handles 6 are in a free state. At this time, the elastic force of the spring plate 12 causes the ring handles 6 to rotate around the first rod 601 away from the injection cylinder 1. At this time, the first rod 601 is located in the circular groove of the first groove 702 near the piston push-pull ring 4. Through the rotation of the ring handles 6, the pressure head 9 moves towards the thin plate 10. When the pressure head 9 contacts the thin plate 10, it will press the thin plate 10 to bend and deform towards the inside of the injection cylinder 1. The thin plate 10 drives the top head 11 to move towards the inside of the injection cylinder 1, so that the top head 11 drives the protrusion to press into the inside of the recess 201. At this time, through the cooperation of the protrusion of the top head 11 and the recess 201, the position of the piston shaft 2 can be restricted. When the injection device is not in use, the piston 5 is prevented from being pushed or pulled, thereby preventing the contrast fluid inside the injection cylinder 1 from being pushed out or air from being sucked into the injection cylinder 1, ensuring the safety of the patient during the contrast procedure.

[0038] The second state is set to allow the piston shaft 2 to move relative to the syringe barrel 1. That is, when the user applies force to the ring handle 6, the piston shaft 2 is in the second state. The user's force can be of two types: one is pulling the piston shaft 2. When pulling the piston shaft 2, contrast fluid is drawn into the syringe barrel 1 via the piston 5. At this time, the piston push-pull ring 4 and the two ring handles 6 are in a state of movement away from each other. Therefore, the ring handles 6 are pushed by the user's fingers, causing the first rod 601 to be located inside the circular groove of the first groove 702 away from the piston push-pull ring 4. The other type is pushing the piston shaft 2. When pushing the piston shaft 2, contrast fluid inside the syringe barrel 1 is squeezed out via the piston 5. The piston push-pull ring 4 and the two ring handles 6 are in a state of close proximity. Therefore, the ring handles 6 are pulled by the user's fingers, so that the first rod 601 is located in the circular groove of the first groove 702 near the piston push-pull ring 4. Both of the above two movement modes of the piston shaft 2 belong to the second state. It should be noted that after the contrast fluid is drawn, the user needs to push the piston shaft 2 immediately so that the piston shaft 2 drives the piston 5 to push the contrast fluid in the syringe 1 to expel the air inside the syringe 1. At the same time, the first rod 601 is switched to the circular groove of the first groove 702 near the piston push-pull ring 4 to ensure that the subsequent tip 11 can be correctly inserted into the recess 201.

[0039] like Figure 2 As shown, a gap of 0.5 mm to 1.0 mm is provided between the four reinforcing plates and the inner wall of the injection cylinder 1. This gap design prevents the piston shaft 2 from contacting the inner wall of the injection cylinder 1 during movement, thus ensuring that the piston shaft 2 avoids friction with the inner wall of the injection cylinder 1. This prevents the piston shaft 2 from encountering resistance and moving smoothly, which in turn prevents the piston 5 from sliding smoothly. Figure 4 and Figure 5Both ring handles 6 have locking blocks 8 fixedly installed at their other ends. The two locking blocks 8 must be symmetrically arranged to limit the piston shaft 2. Figure 11 As shown, the locking block 8 and the ring handle 6 are integrally formed, and there is an inclined angle between the locking block 8 and the ring handle 6. The outer surfaces of the two locking blocks 8 are provided with locking slots 801, as shown. Figure 3 As shown, two first through holes 101 are symmetrically formed on the outer circumference of the syringe 1, and two locking blocks 8 pass through the two first through holes 101 respectively, as shown. Figure 4 As shown, two reinforcing plates are respectively disposed between the inner walls of the two bayonets 801 and slidably installed thereon. The sliding installation allows the reinforcing plates to move relative to the locking block 8 inside the bayonets 801. When the piston shaft 2 moves relative to the injection cylinder 1, the position of the reinforcing plates is restricted inside the bayonets 801 by the two bayonets 801, so that the position of the piston shaft 2 is restricted to move only in the axial direction and will not wobble.

[0040] like Figure 4 and Figure 5 As shown, a second groove 703 is provided on the outer surface of each of the two supports 7 near the other end. The second groove 703 is arranged in a fan shape, as shown below. Figure 11 As shown, two second rods 602 are symmetrically arranged on the outer surface of the ring handle 6. The two second rods 602 and the ring handle 6 are integrally formed. The two second rods 602 are respectively disposed between the inner walls of the two second grooves 703 and slidably installed with the inner walls of the grooves. The ring handle 6 restricts its rotation range through the second rods 602 and the second grooves 703.

[0041] When piston shaft 2 is in the second state, pushing piston shaft 2 causes piston push-pull ring 4 and two ring handles 6 to move closer together. At this time, piston 5 is driven by piston shaft 2 to squeeze the inside of syringe 1, allowing contrast fluid in syringe 1 to be discharged into the corresponding human tissue (such as cardiovascular system). When piston shaft 2 is pushed, the two ring handles 6 are pulled by the user's fingers towards piston push-pull ring 4. At this time, as... Figure 4 The first rod 601 is located inside the circular groove of the first groove 702 near the piston push-pull ring 4. The ring handle 6 rotates around the first rod 601 toward the syringe 1, as... Figure 4 When the second rod 602 moves to the lowest end of the second groove 703, the ring handle 6 stops rotating. The ring handle 6 drives the inner wall of the bayonet 801 to be flush with the surface of the reinforcing plate, thus limiting the reinforcing plate. Because there is a gap of 0.5 mm to 1.0 mm between the reinforcing plate and the inner wall of the injection cylinder 1, the piston shaft 2 will shake during movement, which may lead to the piston shaft 2 breaking. By limiting the reinforcing plate through the bayonet 801, the piston shaft 2 will not shake due to the pushing force during movement, thus avoiding the piston shaft 2 breaking.

[0042] When piston shaft 2 is in the second state, pulling piston shaft 2 causes piston push-pull ring 4 and two ring handles 6 to move away from each other. At this time, piston 5 is driven away from the inside of injection cylinder 1 by piston shaft 2, creating a negative pressure inside injection cylinder 1. This allows injection cylinder 1 to draw external contrast fluid through connector 3 and contrast injection tubing, such as... Figure 8 and Figure 9 As shown, because the two ring handles 6 are subjected to a force away from the piston push-pull ring 4, the first rod 601 is driven to slide to the position of the other circular groove of the first groove 702, causing the ring handles 6 to move around the first rod 601 away from the syringe 1. Because the first rod 601 slides to the position of the other circular groove of the first groove 702, as... Figure 9 As shown, this will cause the pressure head 9 to move away from above the sheet 10. At this time, as... Figure 8 As shown, the movement of the ring handle 6 will not press the thin plate 10 to bend it, and thus will not allow the protrusion on the top 11 to insert into the interior of the recess 201. This ensures that when the piston shaft 2 is pulled, the top 11 will not obstruct the normal pulling of the piston shaft 2. When the first rod 601 switches positions along the two circular grooves of the first groove 702, the narrow waist-shaped groove (the waist-shaped groove and the first rod 601 are interference fit. Because the material of the first rod 601 is elastic, it can slide through the waist-shaped groove when subjected to external force. In actual production applications, the wall thickness of the waist-shaped groove can be designed to be thinner to ensure that the first rod 601 can slide correctly through the waist-shaped groove when subjected to a certain force) can restrict the free movement of the first rod 601, so that the first rod 601 can only switch positions when the ring handle 6 is moved by a human finger.

[0043] like Figure 3 As shown, two third through holes 103 are symmetrically formed on the outer surface of the injection barrel 1. The two third through holes 103 are used for the installation between the positioning component and the injection barrel 1, as shown. Figure 5 As shown, both supports 7 have a misalignment block 701 on their lower surfaces. The misalignment block 701 is triangular in shape and is used to prevent the support 7 from being installed in the wrong direction. The third through hole 103 is matched with the misalignment block 701. In actual production, the support 7 and the injection cylinder 1 are produced separately. After production, the installation position of the support 7 is restricted by the cooperation between the third through hole 103 and the misalignment block 701. Then, the support 7 is fixed to the outer surface of the injection cylinder 1 by glue or welding.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A cardiovascular angiography injection device for minimally invasive interventional procedures, characterized in that, include: The syringe (1) has a connector (3) at one end, which is connected to the inside of the syringe (1). The inner wall of the syringe (1) is sealed and slidably fitted with a piston (5). A piston shaft (2) is fixedly connected to the end face of one end of the piston (5). A piston push-pull ring (4) is fixedly connected to one end of the piston shaft (2) for wearing on the thumb of the user. Two ring handles (6) are symmetrically arranged on both sides of the syringe (1) for use on the middle and index fingers of the user. The piston shaft (2) has at least a first state and a second state. The first state is set such that the piston shaft (2) is restricted from moving relative to the injection cylinder (1). The second state is set such that the piston shaft (2) is allowed to move relative to the injection cylinder (1). The piston shaft (2) is in the first state when the ring handle (6) is in the free state, and the piston shaft (2) is in the second state when the ring handle (6) is in the applied state. A positioning component is provided between the ring handle (6) and the piston shaft (2). Two second through holes (102) are symmetrically opened on the outer surface of the injection cylinder (1). Part of the positioning component is installed inside the two second through holes (102). The outer surface of the injection cylinder (1) is symmetrically provided with two third through holes (103). The two third through holes (103) are used for installation between the positioning component and the injection cylinder (1). The outer surface of the piston shaft (2) is uniformly provided with four reinforcing plates. The four reinforcing plates are provided with a gap of 0.5 mm to 1.0 mm between them and the inner wall of the injection cylinder (1). The four reinforcing plates are uniformly provided with multiple recesses (201). The recesses (201) are used to cooperate with the first state of the positioning component. The positioning component includes: Two supports (7) are symmetrically arranged on both sides of the syringe (1). The interior of each of the two supports (7) is provided with a groove. The two ring handles (6) are respectively arranged inside the two grooves. An opening (704) is provided through the support (7). A thin plate (10) is fixedly connected inside the opening (704). The thin plate (10) is rectangular and does not completely cover the opening (704). The outer surface of each of the two supports (7) is symmetrically provided with two first grooves (702). The first groove (702) is composed of round grooves at both ends and a waist-shaped groove in the middle. The diameter distance between the round grooves at both ends of the first groove (702) is greater than the width distance between the waist-shaped groove. The first groove (702) is used for the installation of the two ring handles (6). The top head (11) is fixedly connected to the thin sheet (10). The top head (11) is located inside the injection cylinder (1). Multiple protrusions are equidistantly arranged on the top head (11). The top head (11) passes through the second through hole (102). The protrusions abut against the inner wall of the pit (201).

2. The cardiovascular angiography injection device for minimally invasive interventional procedures according to claim 1, characterized in that, A pressure head (9) is fixedly installed at one end of the ring handle (6) near the thin sheet (10). The pressure head (9) is positioned above the thin sheet (10) and is used to press down on the thin sheet (10) to make it bend. A spring plate (12) is fixedly installed on the ring handle (6). The spring plate (12) is positioned between the ring handle (6) and the support (7) to support the ring handle (6) to return to its original position. The other end of the spring plate (12) abuts against the inner wall of the groove on the support (7). Two first rods (601) are symmetrically arranged on the outer surface of the ring handle (6). The two first rods (601) are respectively positioned between the inner walls of the two first grooves (702) and slidably installed thereon. The ring handle (6) rotates inside the first groove (702) through the first rods (601).

3. The cardiovascular angiography injection device for minimally invasive interventional procedures according to claim 1, characterized in that, The other end of each of the two ring handles (6) is fixedly installed with a locking block (8). The outer surface of the two locking blocks (8) is provided with a locking slot (801). The outer circumferential surface of the syringe (1) is symmetrically provided with two first through holes (101). The two locking blocks (8) pass through the two first through holes (101) respectively. The two reinforcing plates are respectively disposed between the inner walls of the two locking slots (801) and slidably installed therewith.

4. The cardiovascular angiography injection device for minimally invasive interventional procedures according to claim 3, characterized in that, The outer surfaces of the two supports (7) near the other end are provided with a second groove (703). The second groove (703) is fan-shaped. The outer surface of the ring handle (6) is symmetrically provided with two second rods (602). The two second rods (602) are respectively disposed between the inner walls of the two second grooves (703) and slidably installed therewith. The ring handle (6) is restricted in its rotation range by the second rods (602) and the second grooves (703).

5. The cardiovascular angiography injection device for minimally invasive interventional procedures according to claim 1, characterized in that, The lower surfaces of the two supports (7) are provided with anti-fool blocks (701), the anti-fool blocks (701) are arranged in a triangle, and the third through hole (103) is matched with the anti-fool blocks (701).

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