Perfusion device for transvascular interventional therapy

Abstract

The utility model discloses a perfusion device for transvascular interventional therapy, which comprises a perfusion head, a through hole penetrating through the perfusion head, a vascular interventional tube connected with one end of the perfusion head and communicated with the through hole, and a support air bag arranged on the outer wall of the vascular interventional tube close to the free end of the vascular interventional tube. The vascular intervention tube is provided with an air injection channel communicated with the supporting air bag, and the perfusion head is connected with an air injection connector communicated with the air injection channel; the perfusion head is connected with a medicine injection connector communicated with the through hole, the medicine injection connector is detachably connected with a medicine injection piston cylinder, a threaded connection hole is formed in the position, away from the medicine injection pipe, of the medicine injection piston cylinder, a medicine injection piston is slidably connected into the medicine injection piston cylinder, and the medicine injection piston is connected with a threaded shaft in threaded connection with the threaded connection hole. A knob is arranged at the free end of the threaded shaft. When interventional therapy is carried out, medicine can be ensured to act on a focus more accurately, the medicine is prevented from diffusing in a blood vessel, and the effect of accurate therapy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a perfusion device for transvascular interventional therapy. Background Art

[0002] In the field of modern medicine, the transvascular interventional therapy drug delivery technology plays an important role in the treatment of various diseases such as tumor treatment, hemostasis, and vascular stenosis with its unique advantages. This technology mainly relies on the precise guidance of medical imaging equipment. Through special interventional devices, a percutaneous vascular access is established, a specific catheter is selected into the target blood vessel, and angiographic diagnosis and treatment are carried out. The application of this technology not only makes the treatment process more precise and efficient, but also greatly reduces the pain and side effects of patients.

[0003] Among many interventional therapy applications, liver cancer interventional therapy is particularly prominent. Liver cancer interventional therapy generally involves inserting a catheter through the femoral artery and selectively reaching the liver tumor site for drug administration and embolization. Specifically, doctors will select suitable drugs and embolizing agents according to the specific conditions of patients, such as chemotherapy drugs like cisplatin and calcium folinate, or embolizing agents like lipiodol and absolute ethanol, and directly inject them into the tumor feeding artery or the reflux vein through the catheter to increase the local drug concentration at the lesion, thereby achieving precise treatment of the tumor.

[0004] However, although transvascular interventional therapy drug delivery can accurately deliver drugs to the lesion site, during the process of drug flow in the blood vessels, a certain degree of diffusion will inevitably occur. This diffusion may not only affect the physiological functions of surrounding normal tissues, but may even trigger a series of adverse reactions or complications. For example, the diffusion of chemotherapy drugs to normal liver tissue may cause liver function damage, and the diffusion of embolizing agents to non-target blood vessels may cause vascular occlusion, etc. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a perfusion device for transvascular interventional therapy, which can ensure that drugs act more precisely on the lesion during interventional therapy and prevent drug diffusion in the blood vessels, achieving the effect of precise treatment.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] A perfusion device for transvascular interventional therapy includes a perfusion head. A through hole is provided through the perfusion head. One end of the perfusion head is connected with a blood vessel interventional tube communicated with the through hole. A support airbag is arranged on the outer wall of the blood vessel interventional tube near its free end. The blood vessel interventional tube is provided with an air injection channel arranged along its length direction and communicated with the support airbag. The perfusion head is connected with an air injection connection head communicated with the air injection channel. A rubber sealing plug is arranged at the opening of the air injection connection head;

[0008] The injection head is connected to a drug injection connector connected to the through hole, the drug injection connector is detachably connected to a drug injection piston cylinder, the bottom of the drug injection piston cylinder is connected to a drug injection tube detachably connected to and connected to the drug injection connector, the drug injection piston cylinder is provided with a threaded connection hole away from the drug injection tube, the drug injection piston cylinder is slidably connected with a drug injection piston, the drug injection piston is connected to a threaded shaft threadedly connected to the threaded connection hole, and a knob is provided at the free end of the threaded shaft;

[0009] The end of the perfusion head away from the vascular intervention tube is connected to a sealing connecting tube, and the free end of the sealing connecting tube is connected to a plurality of clamping petals that are tilted outward, and a rubber clamping block is provided on the inner side of each clamping petal. The sealing connecting tube is threadedly connected to a threaded sleeve, and the outer sides of the sealing connecting tube and each clamping petal are provided with external threads that are threadedly connected to the threaded sleeve.

[0010] By adopting the above technical scheme, when performing interventional treatment, first use a guide wire to pass through the through hole and the vascular intervention tube, and insert the guide wire through the blood vessel to the lesion position under medical imaging, and then insert the vascular intervention tube along the guide wire to the position close to the lesion; after the vascular intervention tube reaches the position close to the lesion, use a syringe to inject air or saline into the support airbag through the gas injection connector to make it expand and block the blood vessel, and inject a certain amount of medicine into the vascular intervention tube through the medicine injection piston cylinder to make the medicine enter the lesion through the blood vessel; before perfusing the medicine, first rotate the threaded sleeve to connect with the clamping leaf flap, drive the clamping leaf flap to shrink inward, squeeze the rubber clamping block together, clamp the guide wire and seal the outer end of the through hole, after completing the interventional treatment, use a syringe to extract the air or saline in the support airbag through the gas injection connector to make it shrink and become smaller, then the vascular intervention tube and guide wire can be extracted to complete the interventional treatment.

[0011] The utility model is further configured as follows: the filling head is connected to an injection connecting head connected to the through hole, the injection connecting head is detachably connected to an injection piston cylinder, the bottom of the injection piston cylinder is connected to an injection tube detachably connected to and connected to the injection connecting head, the injection piston cylinder has an opening at one end away from the injection tube, an injection piston is slidably connected inside the injection piston cylinder, and the injection piston is outwardly connected to a piston push rod.

[0012] By adopting the above technical solution, during the interventional treatment, if it is necessary to observe the condition of the peripheral blood vessels, an appropriate amount of contrast agent can be injected into the vascular intervention tube through the injection piston cylinder, so that the condition of the peripheral blood vessels can be seen under medical images.

[0013] The utility model is further configured as follows: ears are arranged on both sides of the opening end of the injection piston cylinder.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] First, the utility model performs interventional therapy drug administration through blood vessels. Before drug administration, the supporting blood vessel is blocked first, and then the drug is perfused into the lesion site to prevent the drug from diffusing along the blood vessels, achieving the effect of precise treatment;

[0016] Second, after the blood vessel interventional tube is inserted into the blood vessel, the utility model can also inject an appropriate amount of contrast agent into the blood vessel interventional tube through the liquid injection piston cylinder, so that the situation of the surrounding blood vessels can be seen under medical imaging, which is convenient for accurately judging the position of the blood vessel where the blood vessel interventional tube is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 is used to show the connection of the perfusion head, the drug injection piston cylinder and the liquid injection piston cylinder;

[0019] Figure 3 is a partial cross-sectional view showing the internal structure of the drug injection piston cylinder;

[0020] Figure 4 is a partial cross-sectional view showing the internal structure of the liquid injection piston cylinder.

[0021] In the figure: 1. Perfusion head; 11. Gas injection connection head; 12. Rubber sealing plug; 13. Drug injection connection head; 14. Liquid injection connection head; 2. Blood vessel interventional tube; 21. Support airbag; 22. Gas injection channel; 3. Drug injection piston cylinder; 31. Drug injection tube; 32. Drug injection piston; 33. Threaded shaft; 34. Knob; 4. Liquid injection piston cylinder; 41. Liquid injection tube; 42. Lugs; 43. Liquid injection piston; 44. Piston push rod; 5. Sealed connection tube; 51. Clamping lobes; 52. Rubber clamping blocks; 6. Threaded sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the utility model in detail with reference to the accompanying drawings.

[0023] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Example, refer to Figures 1-4, A perfusion device for transvascular interventional therapy, including a perfusion head 1. A through hole (not shown in the figure) is drilled through the perfusion head 1. One end of the perfusion head 1 is connected to a blood vessel interventional tube 2 that is connected to and communicates with the through hole, and is used to enter the lesion site along the blood vessel. An outer wall of the blood vessel interventional tube 2 near its free end is provided with a support airbag 21. After the support airbag 21 is inflated, it blocks the blood vessel. An air injection channel 22 is provided outside the blood vessel interventional tube 2 along its length direction and communicates with the support airbag 21. The perfusion head 1 is connected to an air injection connector 11 that communicates with the air injection channel 22. An opening of the air injection connector 11 is provided with a rubber sealing plug 12. The air injection connector 11 is used to inject air into the support airbag 21 to make it expand and become larger.

[0025] The perfusion head 1 is connected to a medicine injection connector 13 that communicates with the through hole. The medicine injection connector 13 is detachably connected to a medicine injection piston cylinder 3. The bottom of the medicine injection piston cylinder 3 is communicated with a medicine injection tube 31 that is detachably connected to and communicates with the medicine injection connector 13. A threaded connection hole is provided at a position of the medicine injection piston cylinder 3 far from the medicine injection tube 31. A medicine injection piston 32 is slidably connected inside the medicine injection piston cylinder 3. The medicine injection piston 32 is connected to a threaded shaft 33 that is threadedly connected to the threaded connection hole. A knob 34 is provided at the free end of the threaded shaft 33, which is convenient for accurate medicine injection.

[0026] The perfusion head 1 is connected to a liquid injection connector 14 that communicates with the through hole. The liquid injection connector 14 is detachably connected to a liquid injection piston cylinder 4. The bottom of the liquid injection piston cylinder 4 is communicated with a liquid injection tube 41 that is detachably connected to and communicates with the liquid injection connector 14. One end of the liquid injection piston cylinder 4 far from the liquid injection tube 41 is open. An ear 42 is provided on each side of the open end of the liquid injection piston cylinder 4. A liquid injection piston 43 is slidably connected inside the liquid injection piston cylinder 4. The liquid injection piston 43 is outwardly connected to a piston push rod 44. By injecting contrast agent through the liquid injection piston cylinder 4, it is convenient to locally observe the blood vessels around the free end of the blood vessel interventional tube 2.

[0027] One end of the perfusion head 1 far from the blood vessel interventional tube 2 is communicated with a sealed connection tube 5. The free end of the sealed connection tube 5 is connected to four clamping lobes 51 that are warped outward. A rubber clamping block 52 is provided on the inner side of each clamping lobe 51. The sealed connection tube 5 is threadedly connected to a threaded sleeve 6. External threads for threaded connection with the threaded sleeve 6 are provided on the outside of the sealed connection tube 5 and each clamping lobe 51. After the threaded sleeve 6 is connected to the clamping lobe 51, it drives the clamping lobe 51 to contract inward, so that the rubber clamping blocks 52 are pressed together, which is used to clamp the guide wire and seal the outer end of the through hole.

[0028] Usage: When performing interventional therapy, first use a guide wire to pass through the through hole and the blood vessel interventional tube 2. Under medical imaging, thread the guide wire through the blood vessel into the lesion location. Subsequently, thread the blood vessel interventional tube 2 along the guide wire into a position close to the lesion. During the process, if it is necessary to observe the condition of the surrounding blood vessels, inject an appropriate amount of contrast agent into the blood vessel interventional tube 2 through the liquid injection piston barrel 4, and the condition of the surrounding blood vessels can be seen under medical imaging. After the blood vessel interventional tube 2 reaches a position close to the lesion, use a syringe to inject air or physiological saline into the support balloon 21 through the air injection connector 11 to make it expand and block the blood vessel. Inject a fixed amount of medicine into the blood vessel interventional tube 2 through the medicine injection piston barrel 3, so that the medicine enters the lesion through the blood vessel. Before injecting the contrast agent and the medicine, first rotate the threaded sleeve 6 to connect with the clamping lobe 51, drive the clamping lobe 51 to contract inward, make the rubber clamping blocks 52 squeeze together, clamp the guide wire and seal the outer end of the through hole. After completing the interventional therapy, use a syringe to draw out the air or physiological saline in the support balloon 21 through the air injection connector 11 to make it shrink and become smaller, and then the blood vessel interventional tube 2 and the guide wire can be withdrawn to complete the interventional therapy.

[0029] This specific embodiment is only an interpretation of the present invention, and it is not a limitation to the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions according to needs, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A perfusion device for transvascular interventional treatment, comprising a perfusion head (1), a through hole being formed through the perfusion head (1), one end of the perfusion head (1) being connected to a vascular intervention tube (2) communicating with the through hole, characterized in that: The outer wall of the vascular intervention tube (2) near its free end is provided with a support airbag (21), the vascular intervention tube (2) is provided with a gas injection channel (22) arranged along its length direction and connected to the support airbag (21), the perfusion head (1) is connected to a gas injection connector (11) connected to the gas injection channel (22), and a rubber sealing plug (12) is provided at the opening of the gas injection connector (11); The injection head (1) is connected to a drug injection connector (13) connected to the through hole, the drug injection connector (13) is detachably connected to a drug injection piston cylinder (3), the bottom of the drug injection piston cylinder (3) is connected to a drug injection tube (31) detachably connected to and connected to the drug injection connector (13), the drug injection piston cylinder (3) is provided with a threaded connection hole away from the drug injection tube (31), the drug injection piston cylinder (3) is slidably connected to a drug injection piston (32), the drug injection piston cylinder (3) is connected to a threaded shaft (33) threadedly connected to the threaded connection hole, and the free end of the threaded shaft (33) is provided with a knob (34); The end of the perfusion head (1) away from the vascular intervention tube (2) is connected to a sealing connection tube (5), and the free end of the sealing connection tube (5) is connected to a plurality of clamping leaves (51) tilted outward, and a rubber clamping block (52) is provided on the inner side of each clamping leaf (51). The sealing connection tube (5) is threadedly connected to a threaded sleeve (6), and the outer sides of the sealing connection tube (5) and each clamping leaf (51) are provided with external threads threadedly connected to the threaded sleeve (6).

2. The perfusion device for transvascular interventional therapy according to claim 1, characterized in that: The filling head (1) is connected to a liquid injection connector (14) connected to the through hole, the liquid injection connector (14) is detachably connected to a liquid injection piston cylinder (4), the bottom of the liquid injection piston cylinder (4) is connected to a liquid injection tube (41) detachably connected to and connected to the liquid injection connector (14), the liquid injection piston cylinder (4) has an opening at one end away from the liquid injection tube (41), a liquid injection piston (43) is slidably connected inside the liquid injection piston cylinder (4), and the liquid injection piston (43) is externally connected to a piston push rod (44).

3. The perfusion device for transvascular interventional therapy according to claim 2, characterized in that: Ears (42) are provided on both sides of the opening end of the injection piston cylinder (4).

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