Catheter and guide wire system retrograde inserted into external carotid artery through superficial temporal artery and use method of catheter and guide wire system

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a catheter guide wire system reversely inserted into an external carotid artery through a superficial temporal artery and a using method thereof.The using method comprises the following steps that S1, a puncture needle is punctured into the superficial temporal artery; s2, a guide wire of the blood vessel sheath is fed into the external carotid artery at the far end of the superficial temporal artery through an inner cavity of the puncture needle; s3, the guide wire is reserved, and the puncture needle is withdrawn; s4, retrograding the blood vessel sheath into the external carotid artery from the superficial temporal artery along the guide wire; s5, withdrawing the vascular sheath inner core and the guide wire; s6, the angiographic catheter is fed into the focus targeted blood supply artery through the guide wire; s7, the guide wire is withdrawn, and the angiographic catheter positioning assembly is connected with the retention catheter; and S8, sewing the catheter positioning assembly and the catheter connecting piece below the skin of the patient. According to the application, the local continuous administration time of head and neck malignant tumors can be effectively prolonged, the concentration of chemotherapeutic drugs obtained by tumor treatment is greatly improved, side effects caused by systemic chemotherapeutic drugs are reduced, and the application is superior to the application of traditional intravenous chemotherapeutic drugs.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a catheter guidewire system for retrograde insertion into the external carotid artery via the superficial temporal artery and a method of using the same. Background Art

[0002] When performing chemotherapy on head and neck tumors, a catheter guidewire system is needed to deliver the required therapeutic drugs to the lesion site to achieve tumor treatment.

[0003] The existing catheter guidewire system for treating head and neck tumors is to puncture the femoral artery and go up through the abdominal aorta, aortic arch, common carotid artery, and finally enter the external carotid artery to reach the lesion site and achieve drug treatment for the tumor. After the catheter guidewire system reaches the lesion site, it is necessary to connect the catheter to the arterial pump to deliver the drug into the catheter.

[0004] Currently, arterial infusion chemotherapy for head and neck tumors usually uses femoral artery puncture and catheterization, which is not suitable for long-term indwelling catheters. Instead, a one-time infusion (about 30 minutes) is used during surgery, which reduces the contact time between the drug and the lesion, thus affecting the treatment effect. In addition, patients need to stay in bed for 12-24 hours after surgery, which increases the patient's discomfort and the risk of deep vein thrombosis. Summary of the invention

[0005] In order to alleviate the patient's discomfort and reduce the risk of deep vein thrombosis, the present application provides a catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery and a method of using the same.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] On the one hand, the present application provides a method for using a catheter guidewire system for retrograde insertion into an external carotid artery via a superficial temporal artery, comprising the following steps:

[0008] S1. Femoral artery puncture: Insert the needle into the superficial temporal artery;

[0009] S2. Insert the guide wire of the vascular sheath through the lumen of the puncture needle into the external carotid artery distal to the superficial temporal artery;

[0010] S3, retain the guide wire and withdraw the puncture needle;

[0011] S4: Insert the vascular sheath retrogradely from the superficial temporal artery into the external carotid artery along the guide wire;

[0012] S5. Remove the inner core of the vascular sheath and the guide wire;

[0013] S6. Insert the angiography catheter into the targeted blood supply artery of the lesion through the guide wire;

[0014] S7. Withdraw the guide wire, and connect the angiography catheter positioning assembly to the retention catheter;

[0015] S8. Suture the catheter positioning assembly and the catheter connector under the patient's skin.

[0016] By adopting the above technical solution, when performing chemotherapy on head and neck tumors, the puncture needle punctures into the superficial temporal artery, inserts the guide wire, the vascular sheath enters the superficial temporal artery, the guide wire passes through the superficial temporal artery and enters the external carotid artery, reaching the lesion location. The angiography catheter reaches the lesion location through the guide wire to achieve the angiography function. After the angiography is completed, the angiography catheter and the vascular sheath are withdrawn, the retention catheter is sent along the guide wire to the lesion location, the guide wire is withdrawn, and the catheter positioning assembly is connected to the end of the retention catheter away from the lesion. Then, the catheter positioning assembly and the catheter connector are sutured under the patient's skin. When chemotherapy is needed, insert the needle connected to the arterial pump into the catheter connector to achieve the input of chemotherapy drugs. It shortens the time spent on head and neck tumor chemotherapy surgery, reduces the discomfort of the patient, and reduces the risk of deep vein thrombosis.

[0017] On the other hand, the present application provides a catheter-guide wire system for retrograde insertion of the external carotid artery through the superficial temporal artery, including:

[0018] A puncture needle, having an inner cavity for piercing the skin and the blood vessel wall;

[0019] A guide wire, passing through the inner cavity and inside the blood vessel, for moving to the lesion location;

[0020] A catheter assembly, including a vascular sheath, an angiography catheter, and a retention catheter. The vascular sheath is sleeved on the guide wire, the angiography catheter passes through the vascular sheath, and the retention catheter passes outside the guide wire;

[0021] A catheter installation mechanism, including a catheter positioning assembly and a catheter connector. One side of the catheter positioning assembly is connected to the patient's head. The catheter positioning assembly is provided with a clamping hole, and the catheter assembly is connected to the catheter positioning assembly through the clamping hole. The catheter connector is connected to the end of the catheter positioning assembly away from the catheter assembly, and the catheter connector is used to connect the catheter positioning assembly and the arterial pump.

[0022] By adopting the above technical solution, the puncture needle pierces the patient's skin and blood vessels to form a channel leading to the lesion location. The vascular sheath enters the superficial temporal artery, and the guide wire passes through the vascular sheath and the guide wire passes inside the inner cavity of the puncture needle. The guide wire passes through the superficial temporal artery and enters the external carotid artery, and finally reaches the lesion location. The guide wire guides the angiography catheter along the guide wire into the lesion location, and the angiography catheter performs angiography. The vascular sheath facilitates the removal of the angiography catheter. The retention catheter enters the patient's body along the guide wire and connects to the lesion location. The catheter positioning assembly positions the end of the retention catheter that is away from the retention catheter on the catheter connector, and the catheter connector and the catheter positioning assembly are sutured under the patient's skin to complete the installation of the retention catheter in the patient's body. When performing chemotherapy, only the needle connected to the arterial pump needs to be inserted through the skin into the catheter connector to deliver the chemotherapy drug into the retention catheter and directly reach the lesion location.

[0023] Optionally, the catheter positioning assembly includes a positioning tube, a sealing hose and a positioning clamp, one end of the positioning tube is fixedly connected to the catheter connector, the sealing hose is arranged in the positioning tube, the positioning clamp is slidably connected to the outer wall of the positioning tube, the diameter of the positioning tube gradually increases in the direction away from the catheter connector, and the positioning clamp is used to reduce the diameter of the positioning tube.

[0024] By adopting the above technical solution, when connecting the retention catheter to the catheter positioning assembly, the end of the retention catheter away from the lesion is first inserted into the sealing hose, and then the positioning clamp slides in the direction away from the catheter connector, causing the diameter of the positioning tube to decrease as the positioning clamp moves. The positioning tube presses the sealing hose, so that the retention catheter and the sealing hose are sealed and connected.

[0025] Optionally, the positioning tube includes a connecting rigid tube, a first positioning half tube and a second positioning half tube, one end of the connecting rigid tube is fixedly connected to the catheter connector, the first positioning half tube and the second positioning half tube are rotatably connected to one end of the connecting rigid tube away from the catheter connector, the first positioning half tube and the second positioning half tube are arranged relatively to each other, one side wall of the sealing hose is fixedly connected to the first positioning half tube toward the inner wall of the second positioning half tube, and the other side wall of the sealing hose is fixedly connected to the second positioning half tube toward the inner wall of the first positioning half tube.

[0026] By adopting the above technical solution, the connecting rigid tube is fixedly connected to the catheter connector, and the first positioning half-tube and the second positioning half-tube are rotatably connected to the connecting rigid tube. When the positioning clamp slides from the connecting rigid tube to the outer shells of the first positioning half-tube and the second positioning half-tube, the first positioning half-tube and the second positioning half-tube can be rotated, and the distance between the first positioning half-tube and the second positioning half-tube is reduced, thereby clamping the sealing hose.

[0027] Optionally, the sealing hose is made of polyurethane material.

[0028] By adopting the above technical solution, the sealing hose made of polyurethane material has good biocompatibility while having flexibility.

[0029] Optionally, the catheter connector includes a liquid passage shell. One end of the liquid passage shell is provided with an infusion cavity. The connecting rigid tube communicates with the infusion cavity. A puncture soft sheet is connected to the cavity wall of the infusion cavity. The puncture soft sheet is arranged away from the cavity bottom of the infusion cavity, and the periphery of the puncture soft sheet is hermetically connected to the inner wall of the liquid passage shell.

[0030] By adopting the above technical solution, the infusion cavity in the liquid passage shell can provide a buffer space for external drugs to enter the retention catheter. While the puncture soft sheet maintains the sealing of the infusion cavity, it enables the needle connecting the arterial pump to be inserted into the infusion cavity, thereby delivering external drugs into the retention catheter.

[0031] Optionally, one end of the liquid passage shell close to the puncture soft sheet gradually increases in cross-section towards the other end and is smoothly arranged.

[0032] By adopting the above technical solution, after the catheter connector is sutured into the patient's skin, it looks smoother from the outside.

[0033] Optionally, the retention catheter is set as a straight-tip catheter. The diameter of the retention catheter is set to 1.6 - 2.1F, and the length is set to 10 - 20 cm.

[0034] By adopting the above technical solution, the straight-tip catheter is used when the blood vessel between the lesion position and the puncture needle insertion position is straight. The 1.6 - 2.1F diameter of the retention catheter can reduce the probability of thrombus formation.

[0035] Optionally, the retention catheter is set as a bent-tip catheter. The diameter of the retention catheter is set to 1.6 - 2.1F, and the length is set to 10 - 20 cm.

[0036] By adopting the above technical solution, the bent-tip catheter can be used when the blood vessel has a bend.

[0037] Optionally, the retention catheter is set as an elbow catheter. The diameter of the retention catheter is set to 1.6 - 2.1F, and the length is set to 10 - 20 cm.

[0038] By adopting the above technical solution, the elbow catheter is convenient for passing through the obstruction area in the blood vessel.

[0039] Compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0040] 1. When performing arterial steel pipe pile chemotherapy for head and neck tumors, a puncture needle is inserted into the superficial temporal artery, a guide wire is inserted, a vascular sheath is introduced into the superficial temporal artery, the guide wire enters the external carotid artery through the superficial temporal artery and reaches the lesion, then a contrast catheter is sent to the lesion position through the guide wire for angiography, and after the angiography is completed, the contrast catheter and the vascular sheath are removed. The retention catheter is sent to the lesion position through the guide wire, the guide wire is pulled out, one end of the retention catheter away from the lesion is connected to the catheter positioning assembly, and the catheter positioning assembly and the catheter connecting piece are sutured under the patient's skin to complete the installation of the retention catheter. When using the catheter guide wire system, the catheter guide wire system enters the external carotid artery through the superficial temporal artery, shortening the path passed by the catheter guide wire system, reducing the difficulty of head and neck tumor chemotherapy surgery, reducing the time spent on head and neck tumor chemotherapy surgery, reducing the discomfort of the patient, and reducing the risk of deep vein thrombosis;

[0041] 2. When connecting the retention catheter to the catheter positioning assembly, insert the retention catheter into the sealing hose, and slide the connecting clamp on the outer wall of the positioning tube in the direction away from the catheter connecting piece, then the retention catheter can be hermetically connected to the sealing hose, which facilitates the installation of the retention catheter;

[0042] 3. The infusion cavity in the catheter connecting piece can provide a buffer space for external drugs to enter the inside of the retention catheter. The puncture soft sheet seals the infusion cavity while facilitating the puncture of the needle into the inside of the infusion cavity. The cross-section of the liquid passing shell gradually increases from one end close to the puncture soft sheet to the other end and is smoothly arranged, which can make the catheter connecting piece look smoother after being sutured under the patient's skin. Description of the Drawings

[0043] Figure 1 is a schematic structural diagram of the puncture needle in Embodiment 1 of the present application.

[0044] Figure 2 is a schematic structural diagram of the catheter assembly in Embodiment 1 of the present application.

[0045] Figure 3 is a schematic structural diagram of the catheter installation mechanism in Embodiment 1 of the present application.

[0046] Figure 4 is a schematic structural diagram of the retention catheter in Embodiment 1 of the present application.

[0047] Figure 5 is a schematic structural diagram of the retention catheter in Embodiment 2 of the present application.

[0048] Figure 6 is a schematic structural diagram of the retention catheter in Embodiment 3 of the present application.

[0049] In the figure: 1. Puncture needle; 11. Inner cavity; 2. Guide wire; 3. Catheter assembly; 31. Vascular sheath; 32. Contrast catheter; 33. Retention catheter; 4. Catheter installation mechanism; 41. Catheter positioning assembly; 411. Clamping hole; 412. Positioning tube; 4121. Connecting hard tube; 4122. First positioning half tube; 4123. Second positioning half tube; 413. Sealing hose; 414. Positioning clamp; 42. Catheter connector; 421. Liquid passing shell; 4211. Liquid infusion cavity; 422. Puncture soft sheet. Specific embodiments

[0050] The following will Figures 1-6 further describe the present application in detail with reference to the accompanying drawings.

[0051] Embodiment 1

[0052] The embodiment of the present application discloses a catheter and guide wire 2 system for retrograde insertion of the external carotid artery through the superficial temporal artery and its usage method.

[0053] Referring to Figure 1 、 Figure 2 and Figure 3 ,a catheter and guide wire 2 system for retrograde insertion of the external carotid artery through the superficial temporal artery includes a puncture needle 1, a guide wire 2, a catheter assembly 3 and a catheter installation mechanism 4.

[0054] The puncture needle 1 is provided with an inner cavity 11, the guide wire 2 is inserted through the inner cavity 11 of the puncture needle 1, the catheter assembly 3 includes a vascular sheath 31, a contrast catheter 32 and a retention catheter 33. The inner diameter of the vascular sheath 31 is larger than the outer diameter of the contrast catheter 32, and the inner diameter of the contrast catheter 32 is larger than the outer diameter of the retention catheter 33. The vascular sheath 31, the contrast catheter 32 and the retention catheter 33 can all be connected to the guide wire 2. The catheter installation mechanism 4 includes a catheter positioning assembly 41 and a catheter connector 42. The catheter positioning assembly 41 is provided with a clamping hole 411. One end of the catheter positioning assembly 41 is connected to the retention catheter 33 through the clamping hole 411, the other end of the catheter positioning assembly 41 is connected to the catheter connector 42, and the catheter connector 42 is connected to the needle head communicating with the arterial pump.

[0055] When performing chemotherapy surgery, first puncture the patient's skin and the blood vessel wall of the superficial temporal artery through the puncture needle 1, insert the guide wire 2, and then send the vascular sheath 31 into the superficial temporal artery. The guide wire 2 enters the external carotid artery from the superficial temporal artery, so as to reach the lesion position. The angiography catheter 32 passes through the vascular sheath 31 and reaches the lesion position along the guide wire 2 for angiography. After the angiography is completed, the angiography catheter 32 and the vascular sheath 31 are removed, and the retention catheter 33 is sent along the guide wire 2 to the lesion position. The guide wire 2 is pulled out, and one side of the retention catheter 33 away from the lesion position is connected to the catheter positioning assembly 41. Then, the catheter positioning assembly 41 and the catheter connecting piece 42 are sutured under the patient's skin to complete the placement of the catheter guide wire system. Sending the catheter guide wire system into the lesion position through the superficial temporal artery shortens the insertion path of the catheter guide wire system in the patient's body, reduces the difficulty of head and neck tumor chemotherapy surgery, and reduces the time spent on head and neck tumor chemotherapy surgery.

[0056] Refer to Figure 4 , the retention catheter 33 is a straight catheter, the diameter of the retention catheter 33 is arranged to be 1.6 - 2.1F (1F = 0.33mm), and the length of the retention catheter 33 is 10 - 20 cm. The diameter of the 1.6 - 2.1F retention catheter 33 can reduce the probability of thrombosis and related complications during the use of the catheter guide wire 2 system.

[0057] Refer to Figure 2 and Figure 3 , the catheter positioning assembly 41 includes a positioning tube 412, a sealing hose 413 and a positioning clamp 414. One end of the positioning tube 412 is fixedly connected to the catheter connecting piece 42, and the diameter of the positioning tube 412 gradually increases in the direction away from the catheter connecting piece 42. The outer wall of the sealing hose 413 is fixedly connected to the inner wall of the positioning tube 412, and the sealing hose 413 is made of polyurethane material. The positioning clamp 414 is slidably connected to the outer wall of the positioning tube 412.

[0058] When the catheter positioning assembly 41 is connected to the retention catheter 33, the retention catheter 33 is first inserted into the sealing hose 413, and then the positioning clamp 414 moves in the direction away from the catheter connecting piece 42, so that the diameter of the positioning tube 412 shrinks, and then the retention catheter 33 and the sealing hose 413 are clamped tightly in the positioning tube 412 to realize the sealed connection between the retention catheter 33 and the sealing hose 413.

[0059] Refer to Figure 2 and Figure 3The positioning tube 412 includes a connecting hard tube 4121, a first positioning half tube 4122, and a second positioning half tube 4123. One end of the connecting hard tube 4121 is fixedly connected to the catheter connector 42, and the first positioning half tube 4122 and the second positioning half tube 4123 are both rotatably connected to the other end of the connecting hard tube 4121. The first positioning half tube 4122 and the second positioning half tube 4123 are arranged relatively and can rotate toward each other, and the first positioning half tube 4122 and the second positioning half tube 4123 are both fixedly connected to the outer wall of the sealing hose 413.

[0060] When not subject to external force, the first positioning half-tube 4122 and the second positioning half-tube 4123 expand the inner diameter of the end of the sealing hose 413 away from the connecting hard tube 4121, so as to facilitate the insertion of the retention conduit 33 into the sealing hose 413. After the retention conduit 33 is inserted into the sealing hose 413, the positioning clamp 414 slides on the outer wall of the positioning tube 412, slides from the connecting hard tube 4121 to the first positioning half-tube 4122 and the second positioning half-tube 4123, and then drives the first positioning half-tube 4122 and the second positioning half-tube 4123 to rotate toward each other, and the diameter of the sealing hose 413 shrinks, so that the retention conduit 33 is clamped in the sealing hose 413 and sealed.

[0061] Reference Figure 3 The catheter connector 42 includes a liquid-passing shell 421 and a puncture film 422. One end of the liquid-passing shell 421 is provided with an infusion cavity 4211. The connecting tube 4121 is connected to the infusion cavity 4211. The puncture film 422 is arranged away from the bottom of the infusion cavity 4211. The circumference of the puncture film 422 is sealed and connected to the wall of the infusion cavity 4211. The outer side of the liquid-passing shell 421 gradually increases from the puncture film 422 toward the bottom of the infusion cavity 4211. The outer shell of the liquid-passing shell 421 is smoothly arranged.

[0062] The needle connected to the arterial pump passes through the patient's skin and the puncture film 422 into the infusion cavity 4211. The infusion cavity 4211 provides a buffer space for the medicine input by the arterial pump. The puncture film 422 seals the infusion cavity 4211 and facilitates the insertion of the needle connected to the arterial pump. The smoothly laid outer curve of the liquid-passing shell 421 can improve the patient's comfort. At the same time, after the catheter connector 42 is sutured into the patient's skin, it looks smoother from the outside.

[0063] The implementation principle of the catheter guidewire 2 system for retrograde insertion into the external carotid artery through the superficial temporal artery in the embodiment of the present application is as follows: when chemotherapy is performed on a head tumor, the superficial temporal artery is punctured by a puncture needle 1, and the guidewire 2 provided with the vascular sheath 31 is inserted, the puncture needle 1 is withdrawn, and the guidewire 2 enters the external carotid artery through the superficial temporal artery until one end of the guidewire 2 contacts the lesion site, and the angiography catheter 32 is introduced through the guidewire 2 for angiography, and then the angiography catheter 32 and the vascular sheath 31 are pulled out, and the angiography catheter 32 is connected to the retention catheter 33. The catheter positioning component 41 connects the end of the retention catheter 33 away from the lesion site, and the catheter connector 42 and the catheter positioning component 41 are sutured under the patient's skin. The catheter guidewire 2 system is sent to the lesion site through the superficial temporal artery, which shortens the path of the catheter guidewire 2 system, reduces the difficulty of chemotherapy surgery for head and neck tumors, and reduces the time spent on chemotherapy surgery for head and neck tumors.

[0064] A method for using a catheter guidewire 2 system for retrograde insertion into an external carotid artery via a superficial temporal artery comprises the following steps:

[0065] S1, femoral artery puncture: insert needle 1 into the superficial temporal artery;

[0066] S2, inserting the guide wire 2 (0.014 or 0.018 inches) of the vascular sheath 31 through the inner cavity of the puncture needle 1 into the external carotid artery at the distal end of the superficial temporal artery;

[0067] S3, keep the guide wire 2 and withdraw the puncture needle 1;

[0068] S4, the vascular sheath 31 is retrogradely introduced from the superficial temporal artery to the external carotid artery along the guide wire 2;

[0069] S5, withdraw the inner core of the vascular sheath 31 and the guide wire 2 (in another embodiment, the vascular sheath may be retained);

[0070] S6, delivering the angiography catheter 32 into the targeted blood supply artery of the lesion through the guide wire 2;

[0071] S7, withdraw the guide wire 2, and connect the positioning assembly of the angiography catheter 32 to the retention catheter 33;

[0072] S8. Suture the catheter positioning assembly 41 and the catheter connector 42 under the patient's skin.

[0073] Embodiment 2

[0074] Compared with the first embodiment, the difference of this embodiment is that, referring to Figure 5 The retention catheter 33 is in the shape of a folded-end catheter. The folded-end catheter can be applied to tumor chemotherapy surgery when the blood vessel is in a folded shape.

[0075] Embodiment 3

[0076] Compared with the first embodiment, the difference of this embodiment lies in that, referring to Figure 6 , the shape of the retention catheter 33 is an elbow catheter. The elbow catheter is convenient to use when the blood vessel has a bent shape and is convenient to pass through the obstructed area in the blood vessel.

[0077] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A method for using a catheter guidewire system for retrograde insertion into an external carotid artery via a superficial temporal artery, characterized in that: The following steps are involved: S1. Femoral artery puncture: Insert the puncture needle (1) into the superficial temporal artery; S2, inserting the guide wire of the vascular sheath (31) through the inner lumen of the puncture needle into the external carotid artery distal to the superficial temporal artery; S3, retain the guide wire (2) and withdraw the puncture needle (1); S4, inserting the vascular sheath (31) retrogradely from the superficial temporal artery into the external carotid artery along the guide wire (2); S5, withdraw the inner core of the vascular sheath (31) and the guide wire (2); S6, delivering the angiography catheter (32) into the targeted blood supply artery of the lesion through the guide wire (2); S7, withdraw the guide wire (2), and connect the positioning assembly of the angiography catheter (32) to the retention catheter (33); S8. Suture the catheter positioning assembly (41) and the catheter connector (42) under the patient's skin.

2. A catheter guidewire system for retrograde insertion into the external carotid artery via the superficial temporal artery, applied to the method for using the catheter guidewire system for retrograde insertion into the external carotid artery via the superficial temporal artery as claimed in claim 1, characterized in that: include: The puncture needle (1) is provided with an inner cavity (11) for puncturing the skin and the blood vessel wall; A guide wire (2), which is inserted into the inner cavity (11) and the blood vessel and is used to move to the location of the lesion; The catheter assembly (3) comprises a vascular sheath (31), an angiographic catheter (32) and a retention catheter (33), wherein the vascular sheath (31) is sleeved on the guide wire (2), the angiographic catheter (32) is inserted into the vascular sheath (31), and the retention catheter (33) is inserted outside the guide wire (2); The catheter installation mechanism (4) comprises a catheter positioning component (41) and a catheter connector (42), wherein one side of the catheter positioning component (41) is connected to the patient's head, the catheter positioning component (41) is provided with a clamping hole (411), the catheter component (3) is connected to the catheter positioning component (41) via the clamping hole (411), the catheter connector (42) is connected to an end of the catheter positioning component (41) away from the catheter component (3), and the catheter connector (42) is used to connect the catheter positioning component (41) and an arterial pump.

3. A catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 2, characterized in that: The catheter positioning assembly (41) comprises a positioning tube (412), a sealing hose (413) and a positioning clamp (414); one end of the positioning tube (412) is fixedly connected to the catheter connector (42); the sealing hose (413) is arranged in the positioning tube (412); the positioning clamp (414) is slidably connected to the outer wall of the positioning tube (412); the diameter of the positioning tube (412) gradually increases in a direction away from the catheter connector (42); and the positioning clamp (414) is used to reduce the diameter of the positioning tube (412).

4. A catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 3, characterized in that: The positioning tube (412) comprises a connecting hard tube (4121), a first positioning half tube (4122) and a second positioning half tube (4123); one end of the connecting hard tube (4121) is fixedly connected to the conduit connector (42); the first positioning half tube (4122) and the second positioning half tube (4123) are rotatably connected to one end of the connecting hard tube (4121) away from the conduit connector (42); the first positioning half tube (4122) and the second positioning half tube (4123) are arranged relatively to each other; one side wall of the sealing hose (413) is fixedly connected to the inner wall of the first positioning half tube (4122) facing the second positioning half tube (4123); the other side wall of the sealing hose (413) is fixedly connected to the inner wall of the second positioning half tube (4123) facing the first positioning half tube (4122).

5. A catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 4, characterized in that: The sealing hose (413) is made of polyurethane material.

6. A catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 3, characterized in that: The catheter connector (42) comprises a liquid-passing shell (421), one end of which is provided with an infusion cavity (4211), the connecting hard tube (4121) being connected to the infusion cavity (4211), the cavity wall of the infusion cavity (4211) being connected with a puncture soft film (422), the puncture soft film (422) being arranged away from the cavity bottom of the infusion cavity (4211), and the peripheral side of the puncture soft film (422) being sealedly connected to the inner wall of the liquid-passing shell (421).

7. A catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 6, characterized in that: The cross section of the liquid-passing shell (421) from one end close to the puncture soft film (422) gradually increases toward the other end and is smoothly arranged.

8. The catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 2, characterized in that: The retention catheter (33) is configured as a straight-tip catheter, the diameter of the retention catheter (33) is configured to be 1.6-2.1F, and the length is configured to be 10-20 cm.

9. A catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 2, characterized in that: The retention catheter (33) is configured as a folded-end catheter, the diameter of the retention catheter (33) is configured to be 1.6-2.1F, and the length is configured to be 10-20cm.

10. The catheter guidewire system for retrograde insertion into the external carotid artery through the superficial temporal artery according to claim 2, characterized in that: The retention catheter (33) is configured as an elbow catheter, the diameter of the retention catheter (33) is configured to be 1.6-2.1F, and the length is configured to be 10-20 cm.

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