Myocardial in-situ syringe

Abstract

The invention provides a myocardial in-situ injector, and relates to the technical field of medical instruments, the myocardial in-situ injector comprises a shell A, an injection tube A and a needle tubing, the interior of the shell A is connected with the injection tube A through threads, one end of the injection tube A is fixedly connected with the needle tubing, and the needle tubing extends out of the shell A; a frame ring is connected to the outer surface of the needle tube located outside the shell A, a connecting frame is installed at one end of the frame ring, a micro electric push rod is arranged on the inner bottom wall of the connecting frame, a connecting block is connected to the telescopic end of the micro electric push rod, and a sliding block is connected to the side wall of the connecting block; sliding grooves matched with the sliding blocks are formed in the inner walls of the two sides of the connecting frame. The flow velocity and flow of the medicament can be controlled, the heart can be prevented from suddenly bearing overlarge liquid load through proper flow velocity and flow velocity, and the risk of excessive expansion and pressure of the heart is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a myocardial in situ injector. Background Art

[0002] In medical fields such as minimally invasive surgery for tissue injection and filling, the key to treatment is to use a suitable injection device or filling system to inject a specific amount or volume of injectable material (including filler) into the target area or specific location (including injection depth) of the tissue to be treated or repaired. Among them, myocardial tissue injection and filling minimally invasive surgery is one of them.

[0003] The prior art (such as the Chinese invention patent publication number CN 115607772A) discloses a myocardial in situ injector for achieving multi-point injection in the myocardium. An in situ injector is an advanced medical device, which is usually used to accurately inject drugs or biological materials directly into specific tissues or organs. Compared with traditional injection methods, this injector has higher accuracy and effectiveness and is usually used in various medical and biological research fields.

[0004] However, the above-mentioned technologies and other existing related technologies often have the following defects: when injecting and filling the myocardium, medical staff need to control the injection flow rate based on their own experience when injecting the drug directly into the patient's body. However, too fast an injection speed will cause the ventricle to bear too much fluid load instantly, which may cause a sudden increase in the patient's heart pressure and increase the burden on the heart, while rapid filling may cause uneven distribution of fluid in the ventricle, affecting the effectiveness of the drug in the myocardium. Therefore, it is urgent to propose a myocardial in situ injector with a more reasonable structure and more convenient use to solve one or more of the above problems. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the present invention provides a myocardial in situ injector, which at least solves the problem that the prior myocardial in situ injector cannot intelligently control the injection speed.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The myocardial in situ syringe comprises a housing A, an injection tube A, and a needle tube, and is characterized in that:

[0010] The interior of the A shell is connected to the A injection tube through a thread, one end of the A injection tube is fixedly connected to the needle tube, and the needle tube extends outside the A shell;

[0011] The outer surface of the needle tube located outside the A shell is connected to a frame ring, one end of the frame ring is installed with a connection frame, the inner bottom wall of the connection frame is provided with a micro electric push rod, the telescopic end of the micro electric push rod is connected to a connection block, the side wall of the connection block is connected to a slider, and the inner walls on both sides of the connection frame are provided with sliding grooves adapted to the slider;

[0012] The side wall of the connecting block is provided with an A hole groove and a B hole groove, the A hole groove is connected with an adapted A rotating block, the B hole groove is connected with an adapted B rotating block, the side wall of the A rotating block is connected with an A fixed block, the side wall of the B rotating block is connected with a B fixed block, the A fixed block and the B fixed block are connected with the same connecting rod, the connecting rod extends into the needle tube, the connecting rod located in the needle tube is provided with an A sleeve and a B sleeve, the outer surface of the A sleeve is connected with an A closing plate, the outer surface of the B sleeve is connected with a B closing plate.

[0013] Preferably, a dispersion hole is provided at one end of the needle tube.

[0014] Preferably, the surface of the needle tube is provided with a scale groove;

[0015] The outer surface of the needle tube is slidably connected with an A connecting ring, the outer surface of the A connecting ring is fixedly connected with a B connecting rod, one end of the B connecting rod is provided with a connecting tube, one side of the outer surface of the connecting tube is fixedly connected with an A support sheet, a clamping rod is inserted into the interior of the connecting tube, the outer surface of the clamping rod is fixedly connected with a baffle, a spring is provided on the surface of the baffle, one end of the clamping rod is rotatably connected to a connecting sleeve through a rotating rod, and one end of the connecting sleeve is fixedly connected to the B support sheet.

[0016] Preferably, it also includes a B shell, which is located on one side of the outer side of A, and a B injection tube is arranged in the B shell, a B piston is inserted in the inside of the B injection tube, an A push rod is arranged at one end of the B piston, the end of the A push rod is connected to an A push plate, the side wall of the A push plate is connected to an auxiliary rod, the auxiliary rod is inserted in the interlayer of the B shell, the bottom of the B shell is connected to a drug feed pipe, one end of the drug feed pipe is inserted with a plug, and the other side of the B shell is connected to a connecting pipe, and the connecting pipe is connected to the A shell.

[0017] Preferably, the side wall of the connecting tube is connected to a fixing sleeve, the inner wall of the fixing sleeve is provided with a groove, a pull rod is arranged inside the fixing sleeve, a rubber ring matching the groove is arranged on the pull rod, and the lower end of the pull rod extends into the connecting tube and is connected to a rubber stopper matching the connecting tube.

[0018] Preferably, a protective sleeve is provided inside the needle tube, and a circular hole for installing the B spring is opened on the outer surface of the protective sleeve. The other end of the B spring is connected to a limiting block, the shape of the limiting block is adapted to the dispersion hole, and one end of the protective sleeve is connected to a bracket.

[0019] Preferably, an A piston is provided inside the A injection tube, a B push rod is inserted inside the A piston, one end of the B push rod is fixedly connected to a C push rod, a sealing sleeve is provided at the junction of the C push rod and the B push rod, the other end of the B push rod is connected to an A connecting plate, one side of the A connecting plate is connected to a C spring, and one end of the C spring is connected to the B connecting plate.

[0020] Preferably, one end of the A piston is connected to the D spring, one end of the D spring is connected to the C piston, one end of the C piston is fixedly connected to the D push rod, one end of the D push rod is connected to the B push plate, and the B push rod passes through the C piston, the D push rod and the B push plate and is connected to the A connecting plate.

[0021] Preferably, an auxiliary plate is fixedly connected to one end of the outer surface of the A shell, and an anti-slip groove is provided on the front side of the auxiliary plate.

[0022] Preferably, an A support rod is fixedly provided on one side of the A connecting ring, a B connecting ring is fixedly connected to one end of the A support rod, and gaskets are provided on both sides of the B connecting ring.

[0023] (III) Beneficial effects

[0024] The present invention provides a myocardial in situ injector. Compared with the prior art, it has the following advantages:

[0025] Beneficial effects:

[0026] 1. Use a micro electric push rod to drive the connecting block, A rotating block and B rotating block to move, promote the rotation of A connecting rod, A closing plate and B closing plate to adjust the flow of the needle tube, effectively control the flow rate of the medical staff injecting the liquid medicine into the patient's body, ensure that the outflow of the liquid medicine is in a suitable state, ensure that the patient's ventricle will not bear too much liquid load, reduce the patient's heart pressure, reduce the burden on the heart, and further improve the uniformity of the liquid distribution in the ventricle, improve the effectiveness of the drug in the myocardium, and control the flow rate and flow of the drug. Appropriate flow and flow rate can prevent the heart from suddenly bearing too much liquid load, reduce the risk of excessive expansion and pressure of the heart, and through a stable flow rate, ensure that the myocardium is fully perfused during filling, so as to obtain enough oxygen and nutrition. In addition, during the filling process, controlling the flow and flow rate can help medical staff monitor the patient's response in real time and make timely adjustments as needed to ensure safety and effectiveness.

[0027] 2. The use of dispersion holes can not only further reduce the flow rate of the drug solution when it enters the myocardium, reduce the impact force, and protect the safety of the patient's ventricle, but also cooperate with the limit block to stabilize the position of the protective cover, ensuring that the protective cover can block the needle and avoid accidental puncture of medical staff or patients by needle exposure. The use of a needle protection device can effectively avoid this risk. Protecting the needle can reduce the invasion of external microorganisms and reduce the risk of infection at the injection site.

[0028] 3. By adjusting the position of the A connecting ring, B supporting block and gasket, the depth of the needle entering the body can be controlled as needed. By controlling the entry depth of the needle, the drug can be accurately injected into the target area to improve the treatment effect. The appropriate needle depth allows the drug to be released at the most effective position, thereby improving the drug's effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the installation of the rubber stopper in the present invention;

[0032] Figure 3 This is a schematic diagram of the installation of the connecting tube in the present invention;

[0033] Figure 4 This is a schematic diagram of the installation of the micro electric push rod in the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the B push rod in the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the needle tube in the present invention;

[0036] Figure 7 Schematic diagram of the structure of piston A in the present invention;

[0037] Figure 8 This is a schematic diagram of the installation of the injection tube A in the present invention;

[0038] Fig. 9 It is a schematic diagram of the structure of the housing A in the present invention;

[0039] Fig.10 This is a schematic diagram of the installation of the B injection tube in the present invention;

[0040] Fig.11 For the present invention Figure 4 A schematic diagram of the enlarged structure at point A;

[0041] Fig.12 For the present invention Figure 5 A schematic diagram of the enlarged structure at B;

[0042] Fig.13 For the present invention Figure 5 Enlarged structural diagram at C.

[0043] In the figure: 1. A housing; 2. A injection tube; 3. needle tube; 4. A piston; 5. frame ring; 6. connection frame; 7. micro electric push rod; 8. connection block; 9. slider; 10. A rotating block; 11. B rotating block; 12. A fixed block; 13. A connecting rod; 14. B fixed block; 15. A sleeve; 16. A closing plate; 17. B sleeve; 18. B closing plate; 19. A connecting ring; 20. B connecting rod; 21. connecting cylinder; 22. A supporting sheet; 23. clamping rod; 24. baffle; 25. A spring; 26. rotating rod; 27. connecting sleeve; 28. B supporting sheet; 29. ​​A supporting rod; 30. B connecting ring; 31. gasket; 32. B shell; 33. B injection tube; 34. B piston; 35. A push rod; 36. A push plate; 37. auxiliary rod; 38. medicine inlet tube; 39. plug; 40. connecting tube; 41. fixing sleeve; 42. rubber ring; 43. pull rod; 44. rubber stopper; 45. protective sleeve; 46. B spring; 47. limit block; 48. bracket; 49. B push rod; 50. C push rod; 51. sealing sleeve; 52. A connecting plate; 53. C spring; 54. B connecting plate; 55. D spring; 56. C piston; 57. D push rod; 58. B push plate; 59. auxiliary plate. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The embodiment of the present application provides an in situ myocardial syringe, which solves the problem that the existing in situ myocardial syringe cannot intelligently control the injection speed, and achieves the purpose of accurately controlling the flow rate and flow rate of the injection liquid in the in situ myocardial syringe.

[0046] In the medical field of minimally invasive surgery for tissue injection and filling, the key to treatment is to use a suitable injection device or filling system to inject a specific amount or volume of injection (including filler) into the target area or specific location (including injection depth) of the tissue to be treated or repaired. Among them, myocardial tissue injection and filling minimally invasive surgery is one of them.

[0047] Myocardium is the main muscle tissue of the heart and is responsible for the contraction and relaxation of the heart to pump blood throughout the body. Myocardial filling, which generally refers to the congestion or filling state of the myocardium, especially during the heart's diastole, when the heart expands and the ventricles fill with blood in preparation for the next contraction, is critical to the normal function of the heart.

[0048] In situ injector is an advanced medical device, which is usually used to accurately inject drugs or biological materials directly into specific tissues or organs. Compared with traditional injection methods, this type of injector has higher accuracy and effectiveness and is usually used in various medical and biological research fields.

[0049] A Chinese invention patent publication number CN 115607772A discloses a myocardial in situ injector and a method of using the same. This technology can achieve multi-point injection in the myocardium under the premise of creating only one needle hole on the surface of the heart, and seal the needle hole after injection to prevent liquid drugs from flowing out, thereby improving the safety and success rate of myocardial injection. However, when injecting and filling the myocardium, medical staff generally inject the drug directly into the patient's body. However, when injecting, medical staff need to control the entry flow rate of the injected drug based on their own experience. Too fast an injection will cause the ventricle to instantly bear an excessive liquid load, which may cause a sudden increase in heart pressure and increase the burden on the heart. Rapid filling may cause uneven distribution of liquid in the ventricle, affecting the effectiveness of the drug in the myocardium.

[0050] In order to at least solve the above-mentioned technical problems existing in the prior art, the present application provides a myocardial in situ injector with a more reasonable structure and more convenient operation.

[0051] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0052] According to the above disclosed technical solution, a closing plate A and a closing plate B are arranged inside the needle tube to adjust the flow rate of the drug solution in the needle tube so that the patient can have a better ventricular tolerance state during the infusion.

[0053] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0054] Embodiment 1:

[0055] like Figures 1 to 13 As shown, a myocardial in situ syringe according to an embodiment of the present invention comprises an A shell 1, an A injection tube 2 is connected to the inner thread of the A shell 1, a needle tube 3 is fixedly connected to one end of the A injection tube 2, a dispersion hole is provided on the outer surface of one end of the needle tube 3, a graduation groove is provided on the surface of the needle tube 3, both sides of the outer surface of the needle tube 3 are clamped with a limiting mechanism, one end of the outer surface of the needle tube 3 is fixedly connected with a limiting control mechanism, an auxiliary mechanism is fixedly connected to one side of the outer surface of the A shell 1, a blocking mechanism is plugged into the outer surface of the auxiliary mechanism, a protective mechanism is clamped into the inner wall of the needle tube 3, an A piston 4 is plugged into the interior of the A injection tube 2, and a pushing mechanism is plugged into the interior of the A piston 4.

[0056] In a further embodiment, the limiting control mechanism includes a frame ring 5, the inner side wall of the frame ring 5 is fixedly connected to one end of the outer surface of the needle tube 3, one end of the frame ring 5 is fixedly connected to a connecting frame 6, the inner bottom wall of the connecting frame 6 is fixedly connected to a micro-electric push rod 7, one end of the micro-electric push rod 7 is fixedly connected to a connecting block 8, both sides of the connecting block 8 are fixedly connected to sliders 9, the outer surface of the slider 9 is slidably connected to the slide groove opened in the inner side wall of the connecting frame 6, one side of the connecting block 8 is provided with an A hole groove for sliding A rotating block 10, and the other side of the connecting block 8 is provided with a B hole groove for sliding B rotating block 11 One side of the A rotating block 10 is fixedly connected to the A fixed block 12, the bottom of the A fixed block 12 is fixedly connected to the A connecting rod 13, the outer surface of the A connecting rod 13 is fixedly connected to the B fixed block 14 near the bottom of the A fixed block 12, one side of the B fixed block 14 is fixedly connected to one side of the B rotating block 11, one side of the outer surface of the A connecting rod 13 is rotatably connected to the A sleeve 15, the outer surface of the A sleeve 15 is fixedly connected to the A closing plate 16, the other side of the outer surface of the A connecting rod 13 is rotatably connected to the B sleeve 17, and the outer surface of the B sleeve 17 is fixedly connected to the B closing plate 18.

[0057] When filling the myocardium, it is necessary to inject drugs inside the myocardium for filling. When injecting drugs, the flow rate and flow of the drugs can be controlled by the limiting control mechanism. The appropriate flow rate and flow velocity can prevent the heart from suddenly bearing too much fluid load and reduce the risk of excessive expansion and pressure of the heart. Through stable flow, it can ensure that the myocardium is fully perfused during filling, so as to obtain enough oxygen and nutrition. In addition, during the filling process, controlling the flow rate and flow velocity can help medical staff monitor the patient's response in real time and make timely adjustments as needed to ensure safety and effectiveness.

[0058] When the flow rate needs to be adjusted, the micro electric push rod can be controlled to move, and the flow rate can be changed by extending or shortening. When the electric push rod is extended or retracted, it drives the connecting block to move, and the connecting block can slide stably under the action of the slider and the slide groove. The movement of the connecting block can also drive the A rotating block and the B rotating block to rotate, and the A rotating block and the B rotating block drive the A fixed block and the B fixed block to rotate, and drive the A connecting rod to rotate, and the A connecting rod drives the A sleeve and the B sleeve to rotate, and the A sleeve and the B sleeve drive the A closing plate and the B closing plate to rotate, so as to adjust the passage of the needle tube and change the flow rate of the needle tube.

[0059] In a further embodiment, Figures 1 to 13 As shown, the limiting mechanism includes an A connecting ring 19, the inner side wall of the A connecting ring 19 is slidably connected to the outer surface of the needle tube 3, the outer surface of the A connecting ring 19 is fixedly connected to a B connecting rod 20, one end of the B connecting rod 20 is fixedly connected to a connecting tube 21, one side of the outer surface of the connecting tube 21 is fixedly connected to an A supporting piece 22, a clamping rod 23 is inserted into the interior of the connecting tube 21, the outer surface of the clamping rod 23 is fixedly connected to a baffle 24, the surface of the baffle 24 is fixedly connected to an A spring 25, one end of the clamping rod 23 is rotatably connected to a connecting sleeve 27 through a rotating rod 26, and one end of the connecting sleeve 27 is fixedly connected to a B supporting piece 28. When the myocardium is filled, when the needle tube 3 enters, the limiting mechanism can be used to control the depth of the needle tube 3 entering the body as needed. By controlling the entry depth of the needle tube 3, it can ensure that the drug is accurately injected into the target area, thereby improving the treatment effect. The appropriate depth of the needle tube 3 enables the drug to be released at the most effective position, thereby improving the effect of the drug.

[0060] When adjusting the depth of the needle tube, you can first pull the connecting sleeve to move, and at the same time stretch the A spring, and the A spring drives the baffle and the clamping rod to move. After the clamping is lost, you can adjust the gasket to the appropriate position, and then release the connecting sleeve. Under the action of the rebound force of the A spring, the clamping rod is driven to clamp the side wall of the needle tube, so that the position of the gasket and the needle tube will not move relative to each other, and the depth of the needle tube inserted into the human body is determined. In addition, after pulling the connecting sleeve to move, you can also rotate the connecting sleeve to make the B support sheet and the A support sheet abut against each other, so that there is no need to control the position of the connecting sleeve with extra effort, and the position of the gasket can be adjusted more accurately.

[0061] Reference Figure 3 One side of the A connecting ring 19 is fixedly connected to the A support rod 29, one end of the A support rod 29 is fixedly connected to the B connecting ring 30, and both sides of the B connecting ring 30 are fixedly connected to gaskets 31. The position of the gasket 31 determines the depth of the needle tube 3 entering the patient's body.

[0062] When adjusting the position of the gasket, the connecting tube is moved by dialing, which drives the A connecting ring and the B connecting ring to move, and then drives the position of the gasket to change.

[0063] In a further embodiment, referring to Fig. 9 and Fig.10 The auxiliary mechanism includes a B shell 32, the outer surface of the B shell 32 is fixedly connected to one side of the A shell 1, the interior of the B shell 32 is fixedly connected to a B injection tube 33, the interior of the B injection tube 33 is plugged with a B piston 34, one end of the B piston 34 is fixedly connected to an A push rod 35, one end of the A push rod 35 is fixedly connected to an A push plate 36, one end of the A push plate 36 is fixedly connected to an auxiliary rod 37, the outer surface of the auxiliary rod 37 is plugged into the interlayer of the B shell 32, one side of the bottom of the B shell 32 is fixedly connected to a drug feed tube 38, one end of the drug feed tube 38 is plugged with a plug 39, and the other side of the bottom of the B shell 32 is fixedly connected to a connecting tube 40. The auxiliary mechanism can replenish the medicine in the A injection tube 2 on the premise of pulling out the needle tube 3 during the filling process. If the needle tube 3 is pulled out, there will be an error in the position of re-entry, resulting in insufficient filling and affecting the filling effect. When the A push rod 35 is pushed by the A push plate 36, the stability can be increased by the auxiliary rod 37.

[0064] In a further embodiment, referring to Figure 2 The sealing mechanism includes a fixed sleeve 41, one end of which is fixedly connected to the outer surface of the connecting tube 40, a groove is provided on the inner wall of the fixed sleeve 41, a rubber ring 42 is clamped inside the groove, a pull rod 43 is fixedly connected to the inner wall of the rubber ring 42, and a rubber stopper 44 is fixedly connected to one end of the pull rod 43. When the auxiliary mechanism is not used, the B injection tube 33 can be blocked by the sealing mechanism.

[0065] In a further embodiment, referring to Figure 5 , Figure 6 and Fig.12 The protection mechanism includes a protective sleeve 45, the outer surface of which is inserted into the interior of the needle tube 3, a round hole for fixing a B spring 46 is opened at one end of the outer surface of the protective sleeve 45, one end of the B spring 46 is fixedly connected to a limiting block 47, and a bracket 48 is fixedly connected to the inner wall of one end of the protective sleeve 45. After the filling injection is completed, the needle tip is exposed and is likely to cause accidental stab injuries to medical staff or patients. The use of a needle protection device can effectively avoid this risk. Protecting the needle tip can reduce the invasion of external microorganisms and reduce the risk of infection at the injection site.

[0066] In a further embodiment, referring to Figure 5 , Figure 7 , Fig. 9 and Fig.13The pushing mechanism includes a B pushing rod 49, the outer surface of which is inserted into the interior of the A piston 4, one end of the B pushing rod 49 is fixedly connected to the C pushing rod 50, and a sealing sleeve 51 is fixedly connected to the junction of the C pushing rod 50 and the B pushing rod 49, the other end of the B pushing rod 49 is fixedly connected to the A connecting plate 52, one side of the A connecting plate 52 is fixedly connected to the C spring 53, and one end of the C spring 53 is fixedly connected to the B connecting plate 54, and the sealing sleeve 51 can increase the sealing performance, and increase the sealing at the interface between the B pushing rod 49 and the A piston 4 and the C piston 56 to avoid air leakage and affect the injection.

[0067] One end of the A piston 4 is fixedly connected to a D spring 55, one end of the D spring 55 is fixedly connected to a C piston 56, one end of the C piston 56 is fixedly connected to a D push rod 57, and one end of the D push rod 57 is fixedly connected to a B push plate 58. Through the setting of the D spring 55, the force required by medical staff to push the A piston 4 can be reduced, making the injection process easier and more comfortable.

[0068] An auxiliary plate 59 is fixedly connected to one end of the outer surface of the A shell 1. An anti-slip groove is provided on the front of the auxiliary plate 59. The auxiliary plate 59 can be held by medical staff during injection, which plays a convenient role.

[0069] Embodiment 2

[0070] The present invention also discloses a method for using a myocardial in situ syringe, which comprises the following steps using the above-mentioned myocardial in situ syringe:

[0071] S1: When the needle tube 3 enters the human body, according to the required depth of entry, slide the A connecting ring 19, the A connecting ring 19 drives the B connecting ring 30 to move, the B connecting ring 30 drives the gasket 31 to move, and the edge of the gasket 31 is used as the boundary, and the position of the scale groove on the surface of the needle tube 3 is clamped. After determining the precise depth, pull and rotate the connecting sleeve 27, the connecting sleeve 27 drives the clamping rod 23 to clamp and fix the needle tube 3, so as to fix the gasket 31 on the needle tube 3 to confirm the depth of the needle tube 3 entering the human body;

[0072] S2: When pushing the medicine, the micro-electric push rod 7 is started, and the micro-electric push rod 7 drives the connecting block 8 to slide. When the connecting block 8 slides, it drives the internal A rotating block 10 and B rotating block 11 to move in parallel. When the A rotating block 10 and B rotating block 11 move, they drive the A fixed block 12 and B fixed block 14 to rotate. When the A fixed block 12 and B fixed block 14 rotate, they drive the A connecting rod 13 to rotate. The A connecting rod 13 drives the A closing plate 16 and B closing plate 18 to rotate. The A closing plate 16 and B closing plate 18 open and close, which can control the size of the gap inside the needle tube 3, thereby controlling the amount of medicine flowing;

[0073] S3: After injecting a dose, if the medicine is insufficient, inject medicine into the B injection tube 33, the medicine enters the connecting tube 40 from the B injection tube 33, and then enters the A injection tube 2 from the connecting tube 40 to replenish the medicine;

[0074] S4: After the injection is completed, push the A connecting plate 52, which drives the C spring 53 and the B connecting plate 54 to move, and the A connecting plate 52 drives the B push rod 49 and the C push rod 50 to move. When the C push rod 50 is pushed forward, the bracket 48 is pushed forward, and the bracket 48 drives the protective sleeve 45 forward. The protective sleeve 45 drives the limit block 47 to move to the dispersed holes opened in the needle tube 3. The limit block 47 is bounced upward by the B spring 46, and the protective sleeve 45 is clamped on the needle tube 3, so that the needle tip of the needle tube 3 can be wrapped.

[0075] Working principle: Use the needle tube 3 to inject the filled medicine into the A injection tube 2. Before entering the patient's body, slide the B connecting ring 30 and snap it into the scale groove on the surface of the needle tube 3 according to the edge of the gasket 31 to determine the depth of the needle tube 3 penetrating into the patient's body. After the determination is completed, pull outward and rotate the connecting sleeve 27. When pulling the connecting sleeve 27, the A spring 25 in the connecting tube 21 is squeezed and retracted, which can drive the clamping rod 23 to stretch. The connecting sleeve 27 drives the B support piece 28 to rotate, and the B support piece 28 and the A support piece 22 are merged and aligned. After the A support piece 22 and the B support piece 28 are merged, the clamping rod 23 is close to the surface of the needle tube 3 to clamp and fix the needle tube 3, so that the gasket 31 is firmly snapped onto the needle tube 3, and then the needle tube 3 is inserted into the patient's body. , hold the auxiliary plate 59 and the A housing 1, push the B push plate 58 and the D push rod 57, the D push rod 57 drives the C piston 56 to move in the A syringe 2, the C piston 56 drives the D spring 55 and the A piston 4 to move, when the A piston 4 moves, it drives the medicine in the A syringe 2 to move, and fills the medicine from the needle tube 3 into the patient's body, then, when filling, in order to control the flow rate of the medicine, start the micro-electric push rod 7, the micro-electric push rod 7 drives the connecting block 8 to slide in the connecting frame 6 through the slider 9, when the connecting block 8 slides, it drives the A rotating block 10 and the B rotating block 11 to rotate, when the A rotating block 10 and the B rotating block 11 rotate, it drives the A connecting rod 13 to rotate, when the A connecting rod 13 rotates, it drives the A closing plate 16 and the B closing plate 18 to open and close back and forth. When the A closing plate 16 and the B closing plate 18 are in the same plane, they are in a completely closed state. According to the opening and closing angles of the A closing plate 16 and the B closing plate 18, the flow rate of the medicine flow can be determined. During the filling process, controlling the flow rate and flow velocity can help medical staff monitor the patient's reaction in real time and make timely adjustments as needed to ensure safety and effectiveness. Subsequently, during the filling process, if it is found that the filled medicine is insufficient, the plug 39 is pulled out without pulling out the needle tube 3, and the medicine is added to the B injection tube 33 using the medicine inlet tube 38. When it is necessary to add additional medicine to the A injection tube 2, the pull rod 43 is pulled out, and the pull rod 43 drives the rubber ring 42 to be pulled upward from the fixed sleeve 41 and moved to the groove at the top of the fixed sleeve 41, and the pull rod 43 is pulled upward. After pulling, the rubber stopper 44 is driven upward to release the blockage, exposing a gap in the connecting tube 40, so that the medicine can flow from the B injection tube 33 to the A injection tube 2. While pushing the A push rod 35, the D push rod 57 is pushed, so that the medicine from the B injection tube 33 can be replenished in the A injection tube 2, and the medicine from the A injection tube 2 can be filled into the patient's body. Then, when pushing the D push rod 57, the setting of the D spring 55 can reduce the force required by medical staff to push the A piston 4, making the injection process easier and more comfortable. Then, after the injection is completed, press the A connecting plate 52, and the A connecting plate 52 drives the C spring 53 to squeeze the B connecting plate 54, so that the A connecting plate 52 and the B connecting plate 54 are tightly attached. When the A connecting plate 52 is squeezed,The B push rod 49 is driven forward, and the B push rod 49 drives the C push rod 50 forward. When the C push rod 50 moves forward, it presses against the bracket 48 and pushes the protective sleeve 45 forward. When the protective sleeve 45 moves forward, it drives the limit block 47 to move to the dispersed hole of the needle tube 3. The B spring 46 drives the limit block 47 to bounce upward, and the protective sleeve 45 is clamped in the needle tube 3, which can prevent the protective sleeve 45 from falling off when the needle tube 3 is taken out. Subsequently, after the needle tube 3 is taken out, the protective sleeve 45 wraps the needle tube 3 to prevent the needle tube 3 from accidentally stabbing the medical staff or patients, causing the risk of infection.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A myocardial in situ injector, comprising a housing A (1), an injection tube A (2), and a needle tube (3), characterized in that: The interior of the A shell (1) is connected to the A injection tube (2) via a thread, one end of the A injection tube (2) is fixedly connected to the needle tube (3), and the needle tube (3) extends to the outside of the A shell (1); The outer surface of the needle tube (3) located outside the A housing (1) is connected to a frame ring (5), one end of the frame ring (5) is installed with a connection frame (6), the inner bottom wall of the connection frame (6) is provided with a micro electric push rod (7), the telescopic end of the micro electric push rod (7) is connected to a connection block (8), the side wall of the connection block (8) is connected to a slide block (9), and the inner walls on both sides of the connection frame (6) are provided with sliding grooves adapted to the slide block (9); The side wall of the connecting block (8) is provided with an A hole groove and a B hole groove, the A hole groove is connected with an adapted A rotating block (10), the B hole groove is connected with an adapted B rotating block (11), the side wall of the A rotating block (10) is connected with an A fixed block (12), the side wall of the B rotating block (11) is connected with a B fixed block (14), the A fixed block (12) and the B fixed block (14) are connected with the same A connecting rod (13), the A connecting rod (13) extends into the needle tube (3), the A sleeve (15) and the B sleeve (17) are arranged on the A connecting rod (13) located in the needle tube (3), the outer surface of the A sleeve (15) is connected with an A closing plate (16), and the outer surface of the B sleeve (17) is connected with a B closing plate (18).

2. The myocardial in situ injector according to claim 1, characterized in that: One end of the needle tube (3) is provided with a dispersion hole.

3. The myocardial in situ injector according to claim 1, characterized in that: The surface of the needle tube (3) is provided with a scale groove; The outer surface of the needle tube (3) is slidably connected to an A connecting ring (19), the outer surface of the A connecting ring (19) is fixedly connected to a B connecting rod (20), one end of the B connecting rod (20) is provided with a connecting tube (21), one side of the outer surface of the connecting tube (21) is fixedly connected to an A supporting plate (22), a clamping rod (23) is inserted into the interior of the connecting tube (21), the outer surface of the clamping rod (23) is fixedly connected to a baffle (24), the surface of the baffle (24) is provided with an A spring (25), one end of the clamping rod (23) is rotatably connected to a connecting sleeve (27) via a rotating rod (26), and one end of the connecting sleeve (27) is fixedly connected to a B supporting plate (28).

4. The myocardial in situ injector according to claim 1, characterized in that: It also includes a B shell (32), wherein the B shell (32) is located on one side of the outer side of A, and a B injection tube (33) is arranged inside the B shell (32), and a B piston (34) is inserted inside the B injection tube (33), and an A push rod (35) is arranged at one end of the B piston (34), and the end of the A push rod (35) is connected to an A push plate (36), and the side wall of the A push plate (36) is connected to an auxiliary rod (37), and the auxiliary rod (37) is inserted in the interlayer of the B shell (32), and the bottom of the B shell (32) is connected to a drug feed pipe (38), and one end of the drug feed pipe (38) is inserted with a plug (39), and the other side of the B shell (32) is connected to a connecting pipe (40), and the connecting pipe (40) is connected to the A shell (1).

5. The myocardial in situ injector according to claim 4, characterized in that: The side wall of the connecting tube (40) is connected to a fixing sleeve (41), the inner wall of the fixing sleeve (41) is provided with a groove, a pull rod (43) is arranged inside the fixing sleeve (41), a rubber ring (42) adapted to the groove is arranged on the pull rod (43), and the lower end of the pull rod (43) extends into the connecting tube (40) and is connected to a rubber stopper (44) adapted to the connecting tube (40).

6. The myocardial in situ injector according to claim 2, characterized in that: A protective sleeve (45) is arranged inside the needle tube (3), and a circular hole for mounting a B spring (46) is provided on the outer surface of the protective sleeve (45). The other end of the B spring (46) is connected to a limit block (47), and the shape of the limit block (47) is adapted to the dispersion hole. One end of the protective sleeve (45) is connected to a bracket (48).

7. The myocardial in situ injector according to claim 6, characterized in that: The A injection tube (2) is provided with an A piston (4) inside, and a B push rod (49) is inserted inside the A piston (4), one end of the B push rod (49) is fixedly connected to a C push rod (50), a sealing sleeve (51) is provided at the junction of the C push rod (50) and the B push rod (49), the other end of the B push rod (49) is connected to an A connecting plate (52), one side of the A connecting plate (52) is connected to a C spring (53), and one end of the C spring (53) is connected to a B connecting plate (54).

8. The myocardial in situ injector according to claim 7, characterized in that: One end of the A piston (4) is connected to a D spring (55), one end of the D spring (55) is connected to a C piston (56), one end of the C piston (56) is fixedly connected to a D push rod (57), one end of the D push rod (57) is connected to a B push plate (58), and the B push rod (49) passes through the C piston (56), the D push rod (57) and the B push plate (58) to be connected to the A connecting plate (52).

9. The myocardial in situ injector according to claim 1, characterized in that: An auxiliary plate (59) is fixedly connected to one end of the outer surface of the A housing (1), and an anti-slip groove is provided on the front side of the auxiliary plate (59).

10. The myocardial in situ injector according to claim 3, characterized in that: An A support rod (29A) is fixedly provided on one side of the A connection ring (19), a B connection ring (30) is fixedly connected to one end of the A support rod (29A), and gaskets (31) are provided on both sides of the B connection ring (30).

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