Angiocardiography injection device for minimally invasive intervention

Abstract

The invention relates to the technical field of injection devices, and discloses an angiocardiography injection device for minimally invasive intervention, which comprises a syringe, one end of the syringe is provided with a connector, and the connector is communicated with the inside of the syringe. When the pressing head makes contact with the sheet, the sheet is pressed to be bent and deformed towards the interior of the syringe, the sheet drives the ejection head to move towards the interior of the syringe, the ejection head drives the protrusion to be pressed into the pit, and at the moment, through cooperation of the protrusion and the pit of the ejection head, the position of the piston shaft can be limited; and when the injection device is not used, the piston is prevented from being pushed or pulled, so that the radiography liquid in the injection tube is prevented from being pushed out or air is prevented from being sucked into the injection tube, and the safety of a patient during a radiography operation is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of injection devices, and in particular to a cardiovascular angiography injection device used for minimally invasive interventional methods. Background Art

[0002] The incidence of cardiovascular disease continues to rise, and the demand for cardiovascular angiography is also increasing. To improve diagnostic accuracy and efficiency, clinicians need more advanced and precise cardiovascular angiography injection devices. For example, in coronary angiography, the injection rate and dosage of the contrast agent must be precisely controlled to clearly demonstrate the degree of coronary artery stenosis and the location of the lesion. In interventional treatment, the injection device must also be able to accurately deliver embolic materials or drugs to the lesion site while ensuring the safety and accuracy of the operation.

[0003] When using existing contrast syringes, users will frequently and intermittently push the piston shaft, causing the piston shaft to drive the piston to compress the contrast fluid into the cardiovascular position. When the contrast syringe is not in use and is placed in a certain position, medical staff may 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 drive the piston to slide on the inner wall of the syringe. The sliding of the piston on the inner wall of the syringe may cause excessive discharge of contrast fluid into the patient's body, or cause the syringe to inhale air and then the air is squeezed into the patient's body, thereby affecting the contrast effect and posing a hidden danger to the patient's life safety. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cardiovascular angiography injection device for minimally invasive interventional methods.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A cardiovascular angiography injection device for minimally invasive interventional procedures comprises: a syringe, one end of which is provided with a connector, the connector being in communication with the interior of the syringe, a piston being sealingly and slidably mounted on the inner wall of the syringe, the end surface of one end of the piston being fixedly connected to a piston shaft, and one end of the piston shaft being fixedly connected to a piston push-pull ring for being fitted over the thumb of a user; Two ring handles, symmetrically arranged on both sides of the syringe barrel, for being sleeved on the middle finger and index finger of the user; The piston shaft has at least a first state and a second state. The first state is set so that the piston shaft is restricted from moving relative to the syringe, and the second state is set so that the piston shaft is allowed to move relative to the syringe.

[0006] As a further solution of the present invention, when the ring handle is in a free state, the piston shaft is in a first state; when the ring handle is in a force-applying state, the piston shaft is in a second state; a positioning assembly is provided between the ring handle and the piston shaft; two second through holes are symmetrically provided on the outer surface of the syringe; part of the structure of the positioning assembly is installed inside the two second through holes; two third through holes are symmetrically provided on the outer surface of the syringe; the two third through holes are used for installation between the positioning assembly and the syringe.

[0007] As a further solution of the present invention, four reinforcement plates are evenly arranged on the outer surface of the piston shaft, and a gap of 0.5㎜-1.0㎜ is provided between the four reinforcement plates and the inner wall of the injection barrel. A plurality of pits are evenly provided on the four reinforcement plates, and the pits are used to cooperate with the first state of the positioning assembly.

[0008] As a further solution of the present invention, the positioning assembly includes: two supports, the two supports are symmetrically arranged on both sides of the injection barrel, the interior of the two supports is provided with a groove, the two ring handles are respectively provided inside the two grooves, the support is provided with an opening, the interior of the opening is fixedly connected to a thin sheet, the thin sheet is rectangular and does not completely cover the opening, the outer surfaces of the two supports are symmetrically provided with two first grooves, the first grooves are composed of circular grooves at both ends and a waist-shaped groove in the middle, the diameter distance of the circular grooves at both ends of the first groove is greater than the width distance of the waist-shaped groove, and the first groove is used for installing the two ring handles; The plug is fixedly connected to the thin sheet, the plug is arranged inside the injection barrel, a plurality of protrusions are equidistantly arranged on the plug, the plug passes through the second through hole, and the protrusions are against the inner wall of the pit.

[0009] As a further solution of the present invention, a pressure head is fixedly installed on one end of the ring handle close to the thin sheet, and the pressure head is arranged above the thin sheet and is used to press down the thin sheet to bend it. A spring sheet is fixedly installed on the ring handle, and the spring sheet is arranged between the ring handle and the support to support the ring handle to reset. The other end of the spring sheet is against the inner wall of the groove on the support. Two first rods are symmetrically provided on the outer surface of the ring handle. The two first rods are respectively arranged between the inner walls of the two first grooves and slidably installed with them. The ring handle rotates inside the first groove through the first rod.

[0010] As a further solution of the present invention, the other ends of the two ring handles are fixedly installed with a clamping block, the outer surfaces of the two clamping blocks are provided with a bayonet, and the circumferential outer surface of the injection barrel is symmetrically provided with two first through holes, and the two clamping blocks respectively pass through the two first through holes, wherein the two reinforcing plates are respectively arranged between the inner walls of the two bayonet and slidably installed therewith.

[0011] As a further solution of the present invention, a second groove is provided on the outer surface of the two supports near the other end, and the second groove is arranged in a fan shape. Two second rods are symmetrically provided on the outer surface of the ring handle, and the two second rods are respectively arranged between the inner walls of the two second grooves and slidably installed therewith. The rotation range of the ring handle is limited by the second rods and the second groove.

[0012] As a further solution of the present invention, the lower surfaces of the two supports are provided with anti-foolproof blocks, the anti-foolproof blocks are arranged in a triangular shape, and the third through hole is matched with the anti-foolproof blocks.

[0013] When the pressure head of the present application contacts the thin sheet, it presses the thin sheet to bend and deform toward the inside of the syringe, and drives the top head to move toward the inside of the syringe through the thin sheet, so that the top head drives the protrusion to be pressed into the inside of the pit. At this time, the position of the piston shaft can be restricted by the cooperation between the protrusion and the pit of the top head. 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 the air from being sucked into the inside of the syringe, ensuring the safety of the patient during the angiography operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the cardiovascular angiography injection device for minimally invasive intervention proposed by the present invention; Figure 2 This is a schematic cross-sectional view of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed by the present invention; Figure 3 This is a schematic diagram of the internal structure of the cardiovascular angiography injection device for minimally invasive intervention proposed by the present invention; Figure 4 This is a schematic diagram of the piston shaft pushing state of the cardiovascular angiography injection device for minimally invasive interventional methods proposed by the present invention; 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 by the present invention; Figure 6 This is a schematic diagram of the free state of the piston shaft of the cardiovascular angiography injection device for minimally invasive intervention proposed by the present invention; Figure 7 This is a schematic cross-sectional view of the free state of the piston shaft of the cardiovascular angiography injection device for minimally invasive intervention proposed by the present invention; Figure 8 This is a schematic diagram of the piston shaft pulling state of the cardiovascular angiography injection device for minimally invasive intervention proposed by the present invention; Figure 9 This is a cross-sectional schematic diagram of the piston shaft of the cardiovascular angiography injection device for minimally invasive interventional methods proposed by the present invention in a pulled state; Figure 10This is a schematic top view of the support of the cardiovascular angiography injection device for minimally invasive interventional procedures proposed by the present invention; Figure 11 This is a schematic diagram of the ring handle of the cardiovascular angiography injection device for minimally invasive intervention proposed by the present invention.

[0015] In the figure: 1. syringe; 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-fouling block; 702. first groove; 703. second groove; 704. opening; 8. clamping block; 801. bayonet; 9. pressure head; 10. thin sheet; 11. ejector head; 12. spring sheet. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] like Figure 1 As shown, the cardiovascular angiography injection device for minimally invasive interventional methods includes: a syringe 1 for containing contrast fluid, a connector 3 for installing a contrast 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 driving the piston shaft 2 to move.

[0018] like Figure 2 As shown, the syringe 1 is cylindrical, with a cavity provided inside for accommodating contrast fluid, a connector 3 is provided at one end of the syringe 1, the connector 3 is connected to the interior of the syringe 1, the syringe 1 is connected to the contrast injection tube through the connector 3, and is used to guide and introduce the contrast fluid in the cavity of the syringe 1, a piston 5 is sealingly and slidably installed on the inner wall of the syringe 1, and the sliding of the piston 5 is used to compress or expand the cavity of the syringe 1, the end surface of one end of the piston 5 is fixedly connected to the piston shaft 2, and the piston 5 is driven to slide in the cavity of the syringe 1 by the piston shaft 2, and one end of the piston shaft 2 is fixedly connected to a piston push-pull ring 4 for being sleeved on the thumb of the user, and the user drives the piston shaft 2 to move through the piston push-pull ring 4; like Figure 2 and Figure 11 As shown, the two ring handles 6 are arranged in a circular shape, which is convenient for the user to insert the fingers therein and to limit the fingers. The two ring handles 6 are symmetrically arranged on both sides of the syringe 1 and are used to be sleeved on the middle finger and index finger of the user, so that the user can form a stable triangular structure with the two ring handles 6 and the piston push-pull ring 4, which is convenient for pushing and pulling the piston push-pull ring 4 to drive the piston shaft 2 to move; The piston shaft 2 has at least a first state and a second state. The first state is set to that the piston shaft 2 is restricted from moving relative to the syringe 1. When the ring handle 6 is in a free state, that is, when the user does not use the injection device and places the injection device in a certain position, the ring handle 6 is not subjected to any force applied by the finger. At this time, the piston shaft 2 is in the first state. Specifically, a positioning component is provided between the ring handle 6 and the piston shaft 2. Because the axial direction of the piston shaft 2 is in a free moving state when the injection device is not in use, the positioning component is used to limit its position to prevent it from moving freely in the axial direction. Figure 3 As shown, two second through holes 102 are symmetrically provided on the outer surface of the syringe 1, so that part of the structure 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 provided on the outer surface of the piston shaft 2, which is a prior art and is used to strengthen the piston shaft 2 to prevent it from bending when subjected to force. A plurality of pits 201 are evenly provided on the four reinforcing plates. When the piston shaft 2 is in the first state, part of the structure of the positioning component passes through the second through holes 102 and will be inserted into the interior of the pits 201, thereby limiting the axial free movement of the piston shaft 2.

[0019] like Figure 2 and Figure 3 As shown, the positioning assembly includes: two supports 7, whose cross-section is U-shaped, and the two supports 7 are symmetrically arranged on both sides of the syringe 1. The interiors of the two supports 7 are provided with grooves, and the two ring handles 6 are respectively provided in the interiors of the two grooves and are rotatably connected to the supports 7, as shown in FIG. Figure 6 and Figure 10 As shown, the support 7 is provided with an opening 704, and the interior of the opening 704 is fixedly connected with a thin sheet 10 having a rectangular shape. The two sides of the width of the thin sheet 10 are respectively fixedly connected to the two ends of the opening 704 along the length direction of the thin sheet 10, so that the thin sheet 10 and the support 7 are integrally formed. The thin sheet 10 does not completely cover the opening 704, so that the two sides of the thin sheet 10 on the length form a gap with the inner wall of the opening 704, so that the thin sheet 10 can bend normally when subjected to force, as shown in FIG. Figure 6 and Figure 7 As shown, the outer surfaces of the two supports 7 are symmetrically provided with two first grooves 702. The first groove 702 is composed of circular grooves at both ends and a waist-shaped groove in the middle. The diameter distance of the circular grooves at both ends of the first groove 702 is greater than the width distance of the waist-shaped groove. The first groove 702 is used for the installation of the two ring handles 6. Figure 6 、 Figure 7 and Figure 11As shown, two first rods 601 are symmetrically provided 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 provided inside the two first grooves 702 and are slidably installed with the inner walls of the first grooves 702. The sliding installation allows the first rod 601 to pass through the waist-shaped groove in the middle of the first groove 702 and switch positions between the circular grooves at both ends thereof. When the first rod 601 is switched to any one of the two circular grooves of the first groove 702 by sliding, the ring handle 6 can be rotated inside the two circular grooves of the first groove 702 through the first rod 601, as shown in FIG. Figure 7 and Figure 11 As shown, a spring sheet 12 is fixedly mounted on the ring handle 6. The spring sheet 12 is made of elastic material and has the ability to elastically deform. The spring sheet 12 is arranged between the ring handle 6 and the support 7. The other end of the spring sheet 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 subjected to force, the elastic force of the spring sheet 12 causes the ring handle 6 to rotate around the first rod 601 away from the syringe 1, thereby driving the remaining components in the positioning assembly to limit the piston shaft 2, as shown in FIG. Figure 7 and Figure 11 As shown, a pressing head 9 is fixedly mounted on one end of the ring handle 6 close to the thin sheet 10. The ring handle 6, the spring sheet 12 and the pressing head 9 are integrally formed. The pressing head 9 is arranged above the thin sheet 10 and is used to press the thin sheet 10 downward to bend it. like Figure 6 and Figure 7 As shown, the plug 11 is fixedly connected to the thin sheet 10 and is arranged inside the syringe 1. A plurality of protrusions are equidistantly arranged on the plug 11. The plug 11 passes through the second through hole 102, and the protrusions abut against the inner wall of the pit 201.

[0020] When the injection device is not in use, that is, 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 sheet 12 causes the ring handle 6 to rotate around the first rod 601 away from the syringe 1. At this time, the first rod 601 is located in the circular groove of the first groove 702 close to the piston push-pull ring 4. The rotation of the ring handle 6 causes the pressure head 9 to move toward the thin plate 10. When the pressure head 9 contacts the thin plate 10, it presses the thin plate 10 to bend and deform toward the inside of the syringe 1. The thin plate 10 drives the push head 11 to move toward the inside of the syringe 1, so that the push head 11 drives the protrusion to be pressed into the inside of the pit 201. At this time, the position of the piston shaft 2 can be restricted by the cooperation between the protrusion of the push head 11 and the pit 201. When the injection device is not in use, the piston 5 is prevented from being pushed or pulled, thereby preventing the contrast solution in the syringe 1 from being pushed out or air from being sucked into the syringe 1, thereby ensuring the safety of the patient during the angiography procedure.

[0021] The second state is set to allow the piston shaft 2 to move relative to the syringe 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 is divided into two types. One is to pull the piston shaft 2. When the piston shaft 2 is pulled, the contrast fluid is extracted into the interior of the syringe 1 through the piston 5. At this time, the piston push-pull ring 4 and the two ring handles 6 are in a moving state away from each other. Therefore, the ring handle 6 is pushed by the user's finger, so that the first rod 601 is located in the first groove 702 away from the circular groove of the piston push-pull ring 4; the other is to push the piston shaft 2. When the piston shaft 2 is pushed, the contrast fluid inside the syringe 1 is squeezed out through the piston 5. At this time, The piston push-pull ring 4 and the two ring handles 6 are in a moving state close to each other, so the ring handles 6 are pulled by the user's fingers at this time, so that the first rod 601 is located inside the circular groove of the first groove 702 close to the piston push-pull ring 4. The above two movement modes of the piston shaft 2 both belong to the second state; it should be noted that after extracting the contrast fluid, the user needs to push the piston shaft 2 as soon as possible, so that the piston shaft 2 drives the piston 5 to push the contrast fluid inside the syringe 1 to expel the air inside the syringe 1, and at the same time, the first rod 601 is switched to the inside of the circular groove of the first groove 702 close to the piston push-pull ring 4 to ensure that the subsequent head 11 can be correctly inserted into the inside of the pit 201.

[0022] like Figure 2 As shown, a gap of 0.5 mm to 1.0 mm is provided between the four reinforcing sheets and the inner wall of the syringe 1. By setting the gap, the piston shaft 2 will not contact the inner wall of the syringe 1 during movement, thereby ensuring that the piston shaft 2 avoids friction with the inner wall of the syringe 1, causing the piston shaft 2 to encounter resistance and be difficult to move smoothly, thereby causing the piston 5 to be unable to slide smoothly, as shown in FIG. Figure 4 and Figure 5 The other ends of the two ring handles 6 are fixed with a clamping block 8. The two clamping blocks 8 must be symmetrically arranged to limit the piston shaft 2. Figure 11 As shown, the clamping block 8 and the ring handle 6 are integrally formed, and an inclined angle is set between the clamping block 8 and the ring handle 6. The outer surfaces of the two clamping blocks 8 are provided with a clamping hole 801, as shown in FIG. Figure 3 As shown, the outer surface of the syringe 1 is symmetrically provided with two first through holes 101, and the two clamping blocks 8 pass through the two first through holes 101 respectively. Figure 4 As shown, two reinforcing plates are respectively arranged between the inner walls of the two bayonet sockets 801 and slidably installed therewith. The sliding installation allows the reinforcing plates to move relative to the block 8 inside the bayonet socket 801. When the piston shaft 2 moves relative to the syringe 1, the position of the reinforcing plates is restricted inside the bayonet socket 801 by the two bayonet sockets 801, so that the position of the piston shaft 2 is restricted to move only in the axial direction and no shaking occurs.

[0023] like Figure 4 and Figure 5As shown, the outer surface of the two supports 7 near the other end is provided with a second groove 703, and the second groove 703 is arranged in a fan shape, as shown in FIG. Figure 11 As shown, two second rods 602 are symmetrically provided 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 provided between the inner walls of the two second grooves 703 and slidably installed with the inner walls. The rotation range of the ring handle 6 is limited by the second rods 602 and the second grooves 703.

[0024] When the piston shaft 2 is in the second state, by pushing the piston shaft 2, the piston push-pull ring 4 and the two ring handles 6 move closer to each other. At this time, the piston 5 is driven by the piston shaft 2 to squeeze the interior of the syringe 1, so that the contrast fluid in the syringe 1 can be discharged into the corresponding human tissue part (such as the cardiovascular system). When pushing the piston shaft 2, the two ring handles 6 are pulled by the user's fingers towards the piston push-pull ring 4. At this time, Figure 4 The first rod 601 is located inside the circular groove of the first groove 702 close to the piston push-pull ring 4, and the ring handle 6 rotates around the first rod 601 toward the injection cylinder 1. Figure 4 When the second rod 602 moves to the lowest end of the second groove 703, the ring handle 6 stops rotating, and the inner wall of the bayonet 801 is driven by the ring handle 6 to be flush with the surface of the reinforcing plate, thereby limiting the position of the reinforcing plate. Because there is a 0.5mm-1.0mm gap between the reinforcing plate and the inner wall of the syringe 1, the piston shaft 2 may shake during movement, thereby causing the piston shaft 2 to break. The bayonet 801 limits the reinforcing plate, so that the piston shaft 2 will not shake due to the driving force during movement, thereby preventing the piston shaft 2 from breaking. When the piston shaft 2 is in the second state, by pulling the piston shaft 2, the piston push-pull ring 4 and the two ring handles 6 move away from each other. At this time, the piston 5 is driven by the piston shaft 2 to leave the interior of the syringe 1, so that negative pressure is formed inside the syringe 1, so that the syringe 1 can absorb the external contrast solution through the connector 3 and the contrast injection tube. Figure 8 and Figure 9 As shown, because the two ring handles 6 are subjected to the force of pushing and pulling the ring 4 away from the piston, the first rod 601 is driven to slide to the position of the other circular groove of the first groove 702, so that the ring handle 6 moves 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 shown in FIG. Figure 9 As shown, the pressure head 9 will be driven away from the top of the sheet 10. At this time, as shown in FIG. Figure 8As shown, the movement of the ring handle 6 will not press the thin sheet 10 to bend it, and will not cause the protrusion on the head 11 to be inserted into the inside of the pit 201, so that when the piston shaft 2 is pulled, the setting of the head 11 will not hinder 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 waist-shaped groove with a small width in the middle is used (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 correctly slide through the waist-shaped groove when subjected to a certain force). The free movement of the first rod 601 can be restricted, so that the first rod 601 must switch positions when the ring handle 6 is driven by a human finger.

[0025] like Figure 3 As shown, the outer surface of the syringe 1 has two third through holes 103 symmetrically formed therein. The two third through holes 103 are used for installation between the positioning assembly and the syringe 1. Figure 5 As shown, the lower surfaces of the two supports 7 are both provided with anti-fool blocks 701, which are arranged in a triangular shape. The anti-fool blocks 701 can prevent the support 7 from being installed in the wrong direction. The third through hole 103 is matched with the anti-fool block 701. When the product is actually produced, the support 7 and the injection cylinder 1 are produced separately. After the production is completed, the installation position of the support 7 is limited by the cooperation of the third through hole 103 and the anti-fool block 701, and then the support 7 is fixed to the outer surface of the injection cylinder 1 by glue or welding.

[0026] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A cardiovascular angiography injection device for minimally invasive intervention, characterized in that: include: A syringe (1) is provided with a connector (3) at one end thereof, the connector (3) is communicated with the interior of the syringe (1), a piston (5) is sealingly and slidably mounted on the inner wall of the syringe (1), an end surface of one end of the piston (5) is fixedly connected to a piston shaft (2), and one end of the piston shaft (2) is fixedly connected to a piston push-pull ring (4) for being sleeved on the thumb of a user; Two ring handles (6), the two ring handles (6) being symmetrically arranged on both sides of the syringe (1) and being used to be sheathed on the middle finger and index finger of a user; The piston shaft (2) has at least a first state and a second state, wherein the first state is set such that the piston shaft (2) is restricted from moving relative to the injection cylinder (1), and the second state is set such that the piston shaft (2) is allowed to move relative to the injection cylinder (1).

2. The cardiovascular angiography injection device for minimally invasive intervention according to claim 1, characterized in that: When the ring handle (6) is in a free state, the piston shaft (2) is in a first state; when the ring handle (6) is in a force-applying state, the piston shaft (2) is in a second state; a positioning assembly is provided between the ring handle (6) and the piston shaft (2); two second through holes (102) are symmetrically provided on the outer surface of the syringe (1); a part of the structure of the positioning assembly is installed inside the two second through holes (102); two third through holes (103) are symmetrically provided on the outer surface of the syringe (1); the two third through holes (103) are used for installation between the positioning assembly and the syringe (1).

3. The cardiovascular angiography injection device for minimally invasive intervention according to claim 1, characterized in that: Four reinforcement sheets are evenly arranged on the outer surface of the piston shaft (2), and a gap of 0.5 mm to 1.0 mm is provided between the four reinforcement sheets and the inner wall of the injection barrel (1). A plurality of pits (201) are evenly opened on the four reinforcement sheets, and the pits (201) are used to cooperate with the first state of the positioning component.

4. The cardiovascular angiography injection device for minimally invasive intervention according to claim 3, characterized in that: Positioning components include: Two supports (7), the two supports (7) are symmetrically arranged on both sides of the injection barrel (1), the interiors of the two supports (7) are both provided with grooves, the two ring handles (6) are respectively provided inside the two grooves, an opening (704) is provided through the support (7), a thin sheet (10) is fixedly connected inside the opening (704), the thin sheet (10) is rectangular, and the thin sheet (10) does not completely cover the opening (704), the outer surfaces of the two supports (7) are both symmetrically provided with two first grooves (702), the first groove (702) consists of circular grooves at both ends and a waist-shaped groove in the middle, the diameter distance of the circular grooves at both ends of the first groove (702) is greater than the width distance of the waist-shaped groove, and the first groove (702) is used for installing the two ring handles (6); A plug (11) is fixedly connected to the thin sheet (10), the plug (11) is arranged inside the syringe (1), a plurality of protrusions are equidistantly arranged on the plug (11), the plug (11) passes through the second through hole (102), and the protrusions abut against the inner wall of the pit (201).

5. The cardiovascular angiography injection device for minimally invasive intervention according to claim 3, characterized in that: A pressure head (9) is fixedly mounted on one end of the ring handle (6) close to the thin sheet (10). The pressure head (9) is arranged above the thin sheet (10) and is used to press the thin sheet (10) downward to bend it. A spring sheet (12) is fixedly mounted on the ring handle (6). The spring sheet (12) is arranged between the ring handle (6) and the support (7) and is used to support the ring handle (6) to reset. The other end of the spring sheet (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 arranged between the inner walls of the two first grooves (702) and are slidably mounted therewith. The ring handle (6) rotates inside the first groove (702) through the first rods (601).

6. The cardiovascular angiography injection device for minimally invasive intervention according to claim 3, characterized in that: The other ends of the two ring handles (6) are fixedly mounted with a clamping block (8), the outer surfaces of the two clamping blocks (8) are provided with a clamping slot (801), the outer circumferential surface of the injection barrel (1) is symmetrically provided with two first through holes (101), the two clamping blocks (8) respectively pass through the two first through holes (101), wherein the two reinforcing plates are respectively arranged between the inner walls of the two clamping slots (801) and slidably mounted therewith.

7. The cardiovascular angiography injection device for minimally invasive intervention according to claim 6, characterized in that: The outer surfaces of the two supports (7) near the other end are each provided with a second groove (703), the second groove (703) being arranged in a fan shape, and the outer surface of the ring handle (6) is symmetrically provided with two second rods (602), the two second rods (602) being respectively arranged between the inner walls of the two second grooves (703) and slidably mounted therewith, and the rotation range of the ring handle (6) is limited by the second rods (602) and the second grooves (703).

8. The cardiovascular angiography injection device for minimally invasive intervention according to claim 2, characterized in that: The lower surfaces of the two supports (7) are both provided with anti-fool blocks (701), the anti-fool blocks (701) are arranged in a triangular shape, and the third through hole (103) is arranged to match the anti-fool blocks (701).

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