A distal end delivery device for a catheter

Abstract

The application belongs to the technical field of medical appliances, and particularly relates to a targeted perfusion catheter coronary artery distal end drug delivery device, which comprises a drug delivery device, a protection cylinder fixedly connected to the side of the drug delivery device, a pushing mechanism arranged in the drug delivery device and used for pushing liquid medicine, a drug delivery mechanism connected to the bottom end of the drug delivery device, a sub-cylinder fixedly arranged in the protection cylinder, an electric push rod fixedly arranged in the protection cylinder, a compression block arranged in the sub-cylinder, and a delivery pipe arranged on the side of the sub-cylinder. The targeted perfusion catheter coronary artery distal end drug delivery device is convenient for delivering and treating liquid medicine by adopting the sub-cylinder, the delivery pipe is not sealed any more, the electric push rod works to drive the compression block to move, the liquid medicine flows into the drug delivery mechanism, the drug delivery mechanism continues to deliver the liquid medicine, the working time is reduced, the working efficiency is improved, the liquid medicine can be quickly replaced for delivery and treatment, and the working efficiency of the targeted perfusion catheter coronary artery distal end drug delivery device is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, in particular to a targeted perfusion catheter intracoronary distal drug delivery device. BACKGROUND

[0002] The targeted perfusion catheter intracoronary distal drug delivery device refers to a device that delivers drugs precisely to the distal vascular site of the coronary artery through a catheter during interventional therapy. The core function is to directly and locally release drugs to the target coronary distal region, achieving high local drug concentration and low systemic drug exposure, reducing systemic side effects. Local drug delivery can quickly relieve intraoperative or postoperative coronary spasm, pain and discomfort. By locally releasing anti-inflammatory drugs and anti-proliferative drugs, the risk of restenosis after surgery is reduced and the vascular endothelium is repaired.

[0003] A coronary intracoronary distal drug delivery device is disclosed in a Chinese patent with publication number CN115645677A, which includes a drug delivery syringe. The bottom of the drug delivery syringe is equipped with a drug delivery adjustment mechanism. Due to the mutual engagement of the special surface gear and the driven gear, the driven gear drives the guide rod to rotate along the direction tangent to the special surface gear driven by the micro motor. The guide rod drives the outer wall connected movable baffle to rotate, and the movable baffle can limit or block the drug flow from the liquid outlet of the fixed seat. The heating wire heats the surface of the heat absorption cylinder to increase the temperature of the drug solution, preventing the drug solution from being too low to cause coronary artery contraction, slowing down the remote infusion speed, or even stopping. Due to the fact that the two sides of the stop block are sleeved in the sliding groove of the limiting frame, during the rotation of the threaded handle, the stop block does not rotate with the threaded handle. Under the limiting action of the sliding groove, the stop block translates up and down and is clamped on the surface of the support frame to stably support the support frame and the indwelling needle on the outside, preventing slipping.

[0004] The existing targeted perfusion catheter intracoronary distal drug delivery device is not convenient for quick replacement of drug solution for delivery. When delivering drug solution to the distal end of the coronary artery, the injection of drug solution is completed by a syringe. If the drug solution in the syringe is insufficient, it needs to be extracted again to supplement the drug solution for delivery. When different drug solutions are replaced, the drug solution also needs to be extracted and delivered again, resulting in slow drug solution replacement speed, complicated operation steps, work process pause, and reduced on-site work efficiency and reaction flexibility.

[0005] Therefore, the present application provides a targeted perfusion catheter intracoronary distal drug delivery device. SUMMARY

[0006] In order to make up for the shortcomings of the prior art and solve the problem of unsatisfactory drug solution replacement and delivery efficiency, the present application provides a targeted perfusion catheter intracoronary distal drug delivery device.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the device comprises a drug delivery device, a protection cylinder is fixedly connected to the side of the drug delivery device, a pushing mechanism for pushing the drug liquid is arranged in the drug delivery device, a drug delivery mechanism is connected to the bottom end of the drug delivery device, a secondary cylinder is fixedly arranged in the protection cylinder, an electric push rod is fixedly arranged in the protection cylinder, a compression block is arranged in the secondary cylinder, and the telescopic end of the electric push rod is fixedly connected to the center position of the compression block, a liquid suction pipe is connected to the bottom end of the secondary cylinder, a delivery pipe is arranged on the side of the secondary cylinder, one end of the delivery pipe is in communication with the drug delivery device, a closing assembly is arranged on the delivery pipe, a limiting mechanism is arranged on the drug delivery device, a compression groove is fixedly arranged in the protection cylinder, and a compression mechanism is arranged in the compression groove.

[0008] By adopting the above scheme, the drug liquid is stored in the drug delivery device, the drug delivery mechanism is connected to the coronary artery of the patient, the pushing mechanism is moved, the drug liquid in the drug delivery device is pushed, the drug liquid flows to the coronary artery of the patient through the drug delivery mechanism for drug delivery treatment, the secondary cylinder can store the drug liquid to be delivered, when different drug liquids need to be injected, the limiting mechanism is controlled to move before the drug liquid in the drug delivery device is injected, the limiting mechanism can block and limit the pushing mechanism when the drug liquid is injected into the drug delivery device, then the closing assembly is controlled, the delivery pipe is no longer sealed, the electric push rod works to drive the compression block to move, the compression block moves to extrude the drug liquid in the secondary cylinder, the drug liquid flows into the drug delivery device through the delivery pipe, the drug liquid flows into the drug delivery mechanism, the drug liquid is continuously delivered through the drug delivery mechanism, and the working time is reduced, the working efficiency is improved, and the drug liquid can be quickly replaced for delivery treatment.

[0009] Preferably, the closing assembly comprises a first spherical valve plug, a first protection box and a first driving motor, the first protection box is fixedly arranged on the delivery pipe, the first spherical valve plug is rotatably arranged in the delivery pipe, and the first driving motor is fixedly arranged in the first protection box and fixedly connected to the first spherical valve plug.

[0010] By adopting the above scheme, the first driving motor works to drive the first spherical valve plug to rotate, the opening and closing state of the delivery pipe is controlled after the first spherical valve plug rotates, and then the drug liquid can be delivered or blocked.

[0011] Preferably, the second spherical valve plug is rotatably arranged in the liquid suction pipe, the second protection box is fixedly arranged on the side of the liquid suction pipe, the second driving motor is fixedly arranged in the second protection box and fixedly connected to the second spherical valve plug.

[0012] Through the above scheme, the second driving motor works to drive the second ball valve plug to rotate, the second ball valve plug can adjust the closing state of the liquid suction pipe when rotating, and the electric push rod works to pull the compression block to reset, so that the liquid suction pipe is no longer closed, and the liquid can be extracted and stored through the liquid suction pipe.

[0013] Preferably, the pushing mechanism comprises a piston, a connecting rod and a disc, the piston is arranged inside the medicine dispenser, one end of the connecting rod is fixedly connected with the center of the piston, and the center of the disc is fixedly connected with the other end of the connecting rod.

[0014] Through the above scheme, the disc can push the connecting rod to move, the connecting rod can push the piston to move when moving, the piston can extrude and deliver the liquid in the medicine dispenser, and the liquid can be delivered for treatment through the medicine delivery mechanism.

[0015] Preferably, the medicine delivery mechanism comprises a connecting barrel, a liquid delivery pipe, a puncture needle, a support disc and a connecting head, the support disc is fixedly arranged at the bottom end of the medicine dispenser, the connecting head is fixedly arranged at the center of the support disc, one end of the connecting head is connected with the inside of the medicine dispenser in communication, the connecting barrel is sleeved on the connecting head, one end of the liquid delivery pipe is fixedly connected with the connecting barrel, the other end of the liquid delivery pipe is fixedly connected with the puncture needle, the medicine dispenser and the protection barrel are both provided with a protective sleeve, and the medicine dispenser is symmetrically connected with a stop block.

[0016] Through the above scheme, when the piston extrudes and pushes the liquid in the medicine dispenser, the puncture needle is connected with the indwelling needle connected with the coronary blood vessel in communication, the liquid flows into the indwelling needle through the cooperation of the liquid delivery pipe and the puncture needle, and then the liquid can enter the coronary artery for medicine delivery treatment.

[0017] Preferably, the protection barrel is fixedly provided with a controller on the side surface, and the protection barrel is fixedly provided with a battery assembly inside.

[0018] Through the above scheme, the controller and the battery assembly are electrically connected with the electronic devices on the targeted catheter coronary intracoronary distal end drug delivery device, and the working of the targeted catheter coronary intracoronary distal end drug delivery device can be controlled.

[0019] Preferably, the limiting mechanism comprises a receiving groove, a knob, a guide rod, a guide block, a threaded rod, a limiting block and a threaded barrel, the receiving grooves are symmetrically arranged on the medicine dispenser and in communication with the inside of the medicine dispenser, the knob is rotationally arranged on the side surface of the receiving groove, the threaded rod is arranged inside the receiving groove and one end of the threaded rod is fixedly connected with the center of the knob, the guide rods are symmetrically arranged inside the receiving groove, the guide block is movably arranged on the guide rod, the limiting block is arranged inside the receiving groove and the guide block is fixedly connected with the limiting block, and the threaded barrel is fixedly arranged inside the limiting block and the threaded rod is threadedly connected with the threaded barrel.

[0020] Through the above scheme, rotating the knob drives the threaded rod to rotate, the threaded cylinder moves the limiting block, the guide rod and the guide block cooperate to move the limiting block stably, and then the limiting block moves to the inside of the dosing device, the piston can be blocked, and the piston is prevented from moving downward to seal the delivery tube.

[0021] Preferably, the connector is provided with an annular groove, and an electric heating ring is fixedly arranged in the annular groove.

[0022] Through the above scheme, the electric heating ring generates heat to warm the connector, and the temperature of the liquid medicine can be adjusted when the liquid medicine flows in the connector, so that the discomfort of the patient caused by the too low temperature of the delivered liquid medicine is effectively avoided.

[0023] Preferably, the adjusting mechanism is provided with a mounting groove and an annular air bag, the mounting groove is arranged in the connector, and the annular air bag is fixedly arranged in the mounting groove.

[0024] Through the above scheme, the connector provides mounting space for the annular air bag through the mounting groove, the volume of the annular air bag can be expanded to adjust the space in the connector, so that the speed of the liquid medicine flow can be controlled, and the flexibility of the device for giving medicine to the distal end of the coronary artery by targeted perfusion of the catheter crown is improved.

[0025] Preferably, the compression mechanism comprises an electric telescopic rod, a guide rod, a limiting frame, a rubber block and a gas delivery pipe, the electric telescopic rod is fixedly arranged in the compression groove, the rubber block is arranged in the compression groove, and the telescopic end of the electric telescopic rod is fixedly connected with the center position of the rubber block, the limiting frame is fixedly arranged in the compression groove, the guide rod penetrates through the limiting frame and is fixedly connected with the rubber block at the bottom end, one end of the gas delivery pipe is in communication with the compression groove, and the other end of the gas delivery pipe is in communication with the annular air bag.

[0026] Through the above scheme, the electric telescopic rod can adjust the position of the rubber block, the rubber block moves to drive the guide rod to move, the limiting frame and the guide rod cooperate to guide the rubber block to move stably, and the movement of the rubber block compresses the air in the compression groove, the compressed air flows into the annular air bag through the gas delivery pipe, the volume of the annular air bag can be adjusted, and the aperture of the liquid medicine flow in the inner ring of the connector can be adjusted, so that the flexibility of the device for giving medicine to the distal end of the coronary artery by targeted perfusion of the catheter crown is improved.

[0027] The beneficial effects of the present application are as follows:

[0028] 1. The targeted perfusion catheter intracoronary distal end drug delivery device of the application, by adopting the auxiliary cylinder, the drug solution can be conveniently delivered and treated, the delivery tube is no longer sealed, the electric push rod works to drive the compression block to move, the compression block moves to extrude the drug solution in the auxiliary cylinder, the drug solution flows into the drug delivery device through the delivery tube, and the drug solution flows into the drug delivery mechanism, the drug solution is continuously delivered through the drug delivery mechanism, the working time is reduced, the working efficiency is improved, the drug solution can be quickly replaced for delivery and treatment, and the working efficiency of the targeted perfusion catheter intracoronary distal end drug delivery device is improved.

[0029] 2. The targeted perfusion catheter intracoronary distal end drug delivery device of the application, by adopting the auxiliary cylinder, the drug solution can be conveniently delivered and treated, the delivery tube is no longer sealed, the electric push rod works to drive the compression block to move, the compression block moves to extrude the drug solution in the auxiliary cylinder, the drug solution flows into the drug delivery device through the delivery tube, and the drug solution flows into the drug delivery mechanism, the drug solution is continuously delivered through the drug delivery mechanism, the working time is reduced, the working efficiency is improved, the drug solution can be quickly replaced for delivery and treatment, and the working efficiency of the targeted perfusion catheter intracoronary distal end drug delivery device is improved.

[0030] 3. The targeted perfusion catheter intracoronary distal end drug delivery device of the application, by adopting the auxiliary cylinder, the drug solution can be conveniently delivered and treated, the delivery tube is no longer sealed, the electric push rod works to drive the compression block to move, the compression block moves to extrude the drug solution in the auxiliary cylinder, the drug solution flows into the drug delivery device through the delivery tube, and the drug solution flows into the drug delivery mechanism, the drug solution is continuously delivered through the drug delivery mechanism, the working time is reduced, the working efficiency is improved, the drug solution can be quickly replaced for delivery and treatment, and the working efficiency of the targeted perfusion catheter intracoronary distal end drug delivery device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] The application will be further described below with reference to the drawings.

[0032] Figure 1 is a perspective view of the targeted perfusion catheter intracoronary distal end drug delivery device of the application;

[0033] Figure 2 is a structural schematic view of the drug delivery device in the application;

[0034] Figure 3 is a structural schematic view of the protective cylinder in the application;

[0035] Figure 4 is a structural schematic view of the receiving groove in the application;

[0036] Figure 5 is an enlarged schematic view of the A structure in the application Figure 2 ;

[0037] Figure 6 is a structural schematic diagram of the auxiliary cylinder in the application;

[0038] Figure 7 is a structural schematic diagram of the connecting head in the application;

[0039] Figure 8 is a structural schematic diagram of the compression groove in the application.

[0040] In the figure: 1, a dosing device; 2, a protective cylinder; 3, a piston; 4, a connecting rod; 5, a disc; 7, a connecting cylinder; 8, a liquid delivery tube; 9, a puncture needle; 10, a protective sleeve; 11, a stop block; 12, a controller; 13, a storage groove; 14, a knob; 15, a guide rod; 16, a guide block; 17, a threaded rod; 18, a limiting block; 19, a threaded cylinder; 20, a battery assembly; 21, an electric push rod; 22, an auxiliary cylinder; 23, a compression block; 24, a liquid suction tube; 25, a delivery tube; 26, a second protective box; 27, a second driving motor; 28, a second spherical valve plug; 29, a first spherical valve plug; 30, a first protective box; 31, a first driving motor; 32, a support disc; 33, a connecting head; 34, an annular groove; 35, an electric heating ring; 36, a mounting groove; 37, an annular air bag; 38, a compression groove; 39, an electric telescopic rod; 40, a guide rod; 41, a limiting frame; 42, a rubber block; 43, a gas delivery tube. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, purposes and effects achieved by the application easy to understand, the application will be further described below in conjunction with specific embodiments.

[0042] As Figures 1 to 8 shown, the application discloses a targeted infusion catheter coronary artery distal end drug delivery device, which comprises a dosing device 1, the dosing device 1 is fixedly connected with a protective cylinder 2 on the side, the dosing device 1 is internally provided with a pushing mechanism for pushing liquid medicine, the dosing device 1 is connected with a dosing mechanism at the bottom end, the protective cylinder 2 is internally fixedly provided with an auxiliary cylinder 22, the protective cylinder 2 is internally fixedly provided with an electric push rod 21, the auxiliary cylinder 22 is internally provided with a compression block 23, and the telescopic end of the electric push rod 21 is fixedly connected with the center position of the compression block 23, the auxiliary cylinder 22 is connected with a liquid suction tube 24 at the bottom end, the auxiliary cylinder 22 is provided with a delivery tube 25 on the side, one end of the delivery tube 25 is communicated with the dosing device 1, the delivery tube 25 is provided with a closing assembly, the dosing device 1 is provided with a limiting mechanism, the protective cylinder 2 is internally fixedly provided with a compression groove 38, and the compression groove 38 is internally provided with a compression mechanism;

[0043] When the patient's coronary artery is treated by using the targeted perfusion catheter intracoronary distal administration device, the drug liquid is stored in the administration device 1, the administration mechanism is connected with the patient's coronary artery, the push mechanism is moved, the drug liquid in the administration device 1 is pushed, the drug liquid flows to the patient's coronary artery through the administration mechanism for administration treatment, the drug liquid to be delivered is stored in the auxiliary cylinder 22, and when different drug liquids need to be injected, the limiting mechanism is controlled to move before the drug liquid in the administration device 1 is injected. When the administration device 1 injects the drug liquid, the limiting mechanism can block and limit the push mechanism, then the closing assembly is controlled, the delivery tube 25 is no longer sealed, the electric push rod 21 works to drive the compression block 23 to move, the compression block 23 moves to extrude the drug liquid in the auxiliary cylinder 22, the drug liquid flows into the administration device 1 through the delivery tube 25, and the drug liquid flows into the administration mechanism. Through the administration mechanism, the drug liquid is continuously delivered, which can reduce the working time, improve the working efficiency, and facilitate rapid replacement of the drug liquid for delivery treatment.

[0044] Further, the closing assembly comprises a first spherical valve plug 29, a first protective box 30 and a first driving motor 31, the first protective box 30 is fixedly arranged on the delivery tube 25, the first spherical valve plug 29 is rotatably arranged in the delivery tube 25, and the first driving motor 31 is fixedly arranged in the first protective box 30, and the output end of the first driving motor 31 is fixedly connected with the first spherical valve plug 29;

[0045] When the closing assembly works to control the opening and closing of the delivery tube 25, the first driving motor 31 works to drive the first spherical valve plug 29 to rotate, the first spherical valve plug 29 rotates to control the opening and closing state of the delivery tube 25, thereby facilitating the delivery of the drug liquid or blocking the backflow of the drug liquid.

[0046] Further, the second spherical valve plug 28 is rotatably arranged in the suction tube 24, the second protective box 26 is fixedly arranged on the side surface of the suction tube 24, the second driving motor 27 is fixedly arranged in the second protective box 26, and the output end of the second driving motor 27 is fixedly connected with the second spherical valve plug 28;

[0047] The second driving motor 27 works to drive the second spherical valve plug 28 to rotate, the second spherical valve plug 28 rotates to adjust the closing state of the suction tube 24, the electric push rod 21 works to pull the compression block 23 to reset, and the suction tube 24 is no longer closed. The drug liquid can be extracted and stored through the suction tube 24.

[0048] Further, the push mechanism comprises a piston 3, a connecting rod 4 and a disc 5, the piston 3 is arranged in the administration device 1, one end of the connecting rod 4 is fixedly connected with the center position of the piston 3, and the center position of the disc 5 is fixedly connected with the other end of the connecting rod 4;

[0049] When the drug delivery device 1 delivers the liquid medicine, the disc 5 can push the connecting rod 4 to move, the connecting rod 4 can push the piston 3 to move, the piston 3 can extrude and deliver the liquid medicine in the drug delivery device 1, and the drug delivery mechanism can deliver the liquid medicine for treatment.

[0050] Further, the drug delivery mechanism comprises a connecting barrel 7, a delivery tube 8, a puncture needle 9, a support disc 32 and a connecting head 33, the support disc 32 is fixedly arranged at the bottom end of the drug delivery device 1, the connecting head 33 is fixedly arranged at the center position of the support disc 32, one end of the connecting head 33 is connected with the inside of the drug delivery device 1, the connecting barrel 7 is sleeved on the connecting head 33, one end of the delivery tube 8 is fixedly connected with the connecting barrel 7, the other end of the delivery tube 8 is fixedly connected with the puncture needle 9, the drug delivery device 1 and the protective barrel 2 are provided with a protective sleeve 10, and the drug delivery device 1 is symmetrically connected with a stop block 11.

[0051] The connecting barrel 7 is connected with the connecting head 33, when the piston 3 extrudes and pushes the liquid medicine in the drug delivery device 1, the puncture needle 9 is connected with the indwelling needle connected with the coronary blood vessel, the liquid medicine flows into the indwelling needle through the cooperation of the delivery tube 8 and the puncture needle 9, and then the liquid medicine can enter the coronary artery for drug treatment.

[0052] Further, the protective barrel 2 is fixedly provided with a controller 12 on the side surface, and the protective barrel 2 is fixedly provided with a battery assembly 20 in the inside.

[0053] The controller 12 and the battery assembly 20 are electrically connected with electronic devices on the targeted perfusion catheter intracoronary distal end drug delivery device, and the working of the targeted perfusion catheter intracoronary distal end drug delivery device can be controlled.

[0054] Further, the limiting mechanism comprises a receiving groove 13, a knob 14, a guide rod 15, a guide block 16, a threaded rod 17, a limiting block 18 and a threaded barrel 19, the receiving groove 13 is symmetrically arranged on the drug delivery device 1 and connected with the inside of the drug delivery device 1, the knob 14 is rotationally arranged on the side surface of the receiving groove 13, the threaded rod 17 is arranged in the inside of the receiving groove 13 and one end of the threaded rod 17 is fixedly connected with the center position of the knob 14, the guide rod 15 is symmetrically arranged in the inside of the receiving groove 13, the guide block 16 is movably arranged on the guide rod 15, the limiting block 18 is arranged in the inside of the receiving groove 13 and the guide block 16 is fixedly connected with the limiting block 18, and the threaded barrel 19 is fixedly arranged in the inside of the limiting block 18 and the threaded rod 17 is threadedly connected with the threaded barrel 19.

[0055] The limiting mechanism limits the position of the piston 3, avoids the piston 3 blocking the end of the delivery pipe 25, and causes the knob 14 to rotate when the sealing is caused, the threaded rod 17 is rotated through the threaded cylinder 19, the limiting block 18 is moved through the cooperation of the guide rod 15 and the guide block 16, the limiting block 18 is stably moved, and then the limiting block 18 is moved to the inside of the dispenser 1, the piston 3 is blocked, the piston 3 is prevented from moving downward to seal the delivery pipe 25, and the sealing ring is arranged between the storage groove 13 and the limiting block 18, which can effectively prevent the liquid medicine from entering the inside of the storage groove 13.

[0056] Further, the connecting head 33 is provided with an annular groove 34, the annular groove 34 is fixedly provided with an electric heating ring 35, and the connecting head 33 is provided with an adjusting mechanism;

[0057] The electric heating ring 35 is controlled to work to generate heat to warm the connecting head 33, the temperature of the liquid medicine flowing in the connecting head 33 can be adjusted, the discomfort of the patient caused by the too low temperature of the delivered liquid medicine is effectively avoided, the temperature of the electric heating ring 35 is not higher than forty degrees, the liquid medicine can be heated to a temperature suitable for the human body, and the comfort is improved.

[0058] Further, the adjusting mechanism is provided with a mounting groove 36 and an annular air bag 37, the mounting groove 36 is arranged in the connecting head 33, and the annular air bag 37 is fixedly arranged in the mounting groove 36;

[0059] The connecting head 33 provides mounting space for the annular air bag 37 through the mounting groove 36, the volume of the annular air bag 37 is expanded to adjust the space in the connecting head 33, and then the speed of the liquid medicine flowing can be controlled, and the flexibility of the distal end drug delivery device for the targeted perfusion of the catheter coronary artery is improved.

[0060] Further, the compression mechanism includes an electric telescopic rod 39, a guide rod 40, a limiting frame 41, a rubber block 42 and a gas conveying pipe 43, the electric telescopic rod 39 is fixedly arranged in the compression groove 38, the rubber block 42 is arranged in the compression groove 38, the telescopic end of the electric telescopic rod 39 is fixedly connected with the center position of the rubber block 42, the limiting frame 41 is fixedly arranged in the compression groove 38, the guide rod 40 penetrates through the limiting frame 41, the bottom end of the guide rod 40 is fixedly connected with the rubber block 42, one end of the gas conveying pipe 43 is in communication with the compression groove 38, and the other end of the gas conveying pipe 43 is in communication with the annular air bag 37;

[0061] The electric telescopic rod 39 works to adjust the position of the rubber block 42. When the rubber block 42 moves, the guide rod 40 is driven to move. Through the cooperation of the limiting frame 41 and the guide rod 40, the rubber block 42 is guided to move stably. When the rubber block 42 moves, the air in the compression groove 38 is compressed. The compressed air flows into the annular air bag 37 through the air pipe 43, so that the volume of the annular air bag 37 is adjusted, and the aperture of the hole for the drug liquid flowing in the inner ring of the connector 33 is adjusted, thereby improving the flexibility of the device for giving medicine to the distal end of the coronary artery through the targeted perfusion catheter.

[0062] Working principle: first use the targeted perfusion catheter coronary artery distal administration device for patients with coronary artery administration treatment, through the administration of 1 storage liquid, through the administration mechanism and the patient's coronary artery connected, through the disc 5 can push the connecting rod 4 movement, connecting rod 4 movement can push the piston 3 movement, piston 3 movement on the drug liquid in the administration of 1 extrusion delivery, make the puncture needle 9 and the indwelling needle connected with the coronary artery connected, through the infusion tube 8 and puncture needle 9 cooperation will make the drug flow into the indwelling needle, and can make the drug into the coronary artery administration treatment, through the sub cylinder 22 can store the drug to be delivered, after the drug in the administration of 1 delivery, need to inject different liquid, before the injection of drug in the administration of 1, can control the limit mechanism movement, turn the knob 14 will drive the threaded rod 17 rotation, through the threaded cylinder 19 will make the limit block 18 movement, through the guide rod 15 and guide block 16 cooperation will make the limit block 18 stable movement, and then make the limit block 18 move to the administration of 1, can block the piston 3, avoid the piston 3 down to seal the delivery tube 25, a drive motor 31 work can drive a ball valve plug 29 rotation, a ball valve plug 29 rotation, can control the opening and closing state of the delivery tube 25, and then facilitate the delivery of drug, or block the backflow of drug, no longer seal the delivery tube 25, electric push rod 21 work will drive the compression block 23 movement, compression block 23 movement will extrude the drug in the sub cylinder 22, through the delivery tube 25 will make the drug flow into the administration of 1, will make the drug flow into the administration mechanism, through the administration mechanism continues to deliver drug, through this way can reduce the working time, improve work efficiency, facilitate the rapid replacement of drug delivery treatment, control the electric heating ring 35 work produces heat can be used to connect the head 33 heating, drug in the connecting head 33 flow, can adjust the temperature of the drug, effectively avoid the temperature of the drug delivery too low caused by the patient's discomfort, electric heating ring 35 temperature is not higher than forty degrees, can heat the drug to the temperature of the human body, improve the comfort, electric telescopic rod 39 work can adjust the position of the rubber block 42, rubber block 42 movement will drive the guide rod 40 movement, through the limit frame 41 and guide rod 40 cooperation will guide the rubber block 42, make the rubber block 42 stable movement, rubber block 42 movement will compress the air in the compression groove 38, compressed air through the gas pipe 43 will make the air flow into the annular air bag 37, can adjust the volume of the annular air bag 37, and then realize the adjustment of the hole diameter of the connecting head 33 inner ring for drug flow, facilitate the control of the flow rate of the drug, improve the flexibility of the targeted perfusion catheter coronary artery distal administration device.

[0063] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A distal end intracoronary administration device for targeted perfusion of a catheter, characterized in that: The utility model provides an injection device, which comprises a drug delivery device (1), a protective cylinder (2) is fixedly connected to the side of the drug delivery device (1), a pushing mechanism for pushing liquid medicine is arranged in the drug delivery device (1), a drug delivery mechanism is connected to the bottom end of the drug delivery device (1), a sub-cylinder (22) is fixedly arranged in the protective cylinder (2), an electric push rod (21) is fixedly arranged in the protective cylinder (2), a compression block (23) is arranged in the sub-cylinder (22), and the center of the electric push rod (21) is fixedly connected to the compression block (23), a liquid suction pipe (24) is connected to the bottom end of the sub-cylinder (22), a delivery pipe (25) is arranged on the side of the sub-cylinder (22), and one end of the delivery pipe (25) is connected to the drug delivery device (1), a closing assembly is arranged on the delivery pipe (25), a limiting mechanism is arranged on the drug delivery device (1), a compression groove (38) is fixedly arranged in the protective cylinder (2), and a compression mechanism is arranged in the compression groove (38). The closing assembly comprises a first spherical valve plug (29), a first protective box (30) and a first driving motor (31), the first protective box (30) is fixedly arranged on the delivery pipe (25), the first spherical valve plug (29) is rotatably arranged in the delivery pipe (25), and the first driving motor (31) is fixedly arranged in the first protective box (30) and fixedly connected to the first spherical valve plug (29). A second spherical valve plug (28) is rotatably arranged in the liquid suction pipe (24), a second protective box (26) is fixedly arranged on the side of the liquid suction pipe (24), a second driving motor (27) is fixedly arranged in the second protective box (26), and the output end of the second driving motor (27) is fixedly connected to the second spherical valve plug (28).

2. A distally directed intracoronary delivery system according to claim 1, wherein: The pushing mechanism comprises a piston (3), a connecting rod (4) and a disc (5), the piston (3) is arranged in the drug delivery device (1), one end of the connecting rod (4) is fixedly connected to the center of the piston (3), and the center of the disc (5) is fixedly connected to the other end of the connecting rod (4).

3. A distally directed intracoronary delivery system according to claim 2, wherein: The drug delivery mechanism comprises a connecting cylinder (7), a liquid delivery pipe (8), a puncture needle (9), a supporting disc (32) and a connecting head (33), the supporting disc (32) is fixedly arranged at the bottom end of the drug delivery device (1), the connecting head (33) is fixedly arranged at the center of the supporting disc (32), one end of the connecting head (33) is connected to the inside of the drug delivery device (1), the connecting cylinder (7) is sleeved on the connecting head (33), one end of the liquid delivery pipe (8) is fixedly connected to the connecting cylinder (7), the other end of the liquid delivery pipe (8) is fixedly connected to the puncture needle (9), protective sleeves (10) are arranged on the drug delivery device (1) and the protective cylinder (2), and stop blocks (11) are symmetrically connected to the drug delivery device (1).

4. A distally directed drug delivery device according to claim 3, wherein: A controller (12) is fixedly arranged on the side of the protective cylinder (2), and a battery assembly (20) is fixedly arranged in the protective cylinder (2).

5. A distally directed intracoronary administration device according to claim 4, wherein: The limiting mechanism comprises a receiving groove (13), a knob (14), a guide rod (15), a guide block (16), a threaded rod (17), a limiting block (18) and a threaded cylinder (19), the receiving groove (13) is symmetrically arranged on the dosing device (1) and communicates with the inside of the dosing device (1), the knob (14) is rotatably arranged on the side of the receiving groove (13), the threaded rod (17) is arranged in the receiving groove (13) and one end of the threaded rod (17) is fixedly connected with the center position of the knob (14), the guide rod (15) is symmetrically arranged in the receiving groove (13), the guide block (16) is movably arranged on the guide rod (15), the limiting block (18) is arranged in the receiving groove (13) and the guide block (16) is fixedly connected with the limiting block (18), and the threaded cylinder (19) is fixedly arranged in the limiting block (18) and the threaded rod (17) is threadedly connected with the threaded cylinder (19).

6. A distally directed intracoronary administration device according to claim 5, wherein: The connecting head (33) is provided with an annular groove (34), the annular groove (34) is fixedly provided with an electric heating ring (35) inside, and the connecting head (33) is provided with an adjusting mechanism inside.

7. A distally directed intra-coronary drug delivery device according to claim 6, wherein: The adjusting mechanism is provided with a mounting groove (36) and an annular air bag (37), the mounting groove (36) is arranged in the connecting head (33), and the annular air bag (37) is fixedly arranged in the mounting groove (36).

8. The distally directed, targeted, intra-coronary infusion device of claim 1, wherein: The compression mechanism comprises an electric telescopic rod (39), a guide rod (40), a limiting frame (41), a rubber block (42) and a gas conveying pipe (43), the electric telescopic rod (39) is fixedly arranged in the compression groove (38), the rubber block (42) is arranged in the compression groove (38) and the telescopic end of the electric telescopic rod (39) is fixedly connected with the center position of the rubber block (42), the limiting frame (41) is fixedly arranged in the compression groove (38), the guide rod (40) penetrates through the limiting frame (41) and the bottom end of the guide rod (40) is fixedly connected with the rubber block (42), and one end of the gas conveying pipe (43) communicates with the compression groove (38) and the other end of the gas conveying pipe (43) communicates with the annular air bag (37).

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