Femoral arterial cannula assembly for providing lower extremity blood perfusion

Abstract

This invention relates to, but is not limited to, the technical field of medical devices, and discloses a femoral artery cannulation assembly for providing lower limb blood perfusion. It includes a cannula for lower limb artery insertion therapy and a guidewire inserted through the middle of the cannula. It also includes a hemostasis unit, an injection unit, and an insertion unit. A sealing component is located at one end of the cannula for supporting the patient during lower limb artery cannulation. The sealing component includes a connector at one end of the cannula, a movable hole at the top of the connector, a semi-circular sealing plate at the bottom of the movable hole, a telescopic rod at the top of the semi-circular sealing plate, a separation block at the top of the telescopic rod, and limiting holes on both sides of the separation block. Through the insertion of a gel-like coagulation material, the patient's healing and recovery time is shortened, wound healing performance is improved, and the protection and disinfection of the injection site greatly reduces the risk of external bacterial infection of the injection tube, resulting in better treatment outcomes for the patient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, but not limited to, a femoral artery cannulation assembly and method for providing blood perfusion to the lower limbs. Background Technology

[0002] The femoral artery is a direct continuation of the external iliac artery. It shares a vascular sheath with the vein, but is separated by connective tissue. The femoral artery enters the vascular lumen from behind the midpoint of the inguinal ligament and then enters the femoral triangle. It then descends through the apex of the femoral triangle into the adductor canal. The femoral artery is the main artery of the lower limb, and its largest branch is the deep femoral artery. It can transport blood to the lower limb, providing sufficient blood supply to the lower limb and effectively ensuring the normal operation of the lower limb.

[0003] Lower limb arterial perfusion therapy is a method for treating lower limb arterial disease and neuropathy, and it is also a major method for treating arterial vascular diseases such as diabetic foot. Lower limb arterial perfusion therapy mainly uses puncture technology to infuse various effective drugs through microchannels, allowing the drugs to directly reach the lesion area, thereby increasing the local drug concentration and efficacy. It can effectively control infection, fully dilate blood vessels, improve aortic blood supply, promote blood circulation and nerve metabolism in the lesion area, and achieve the effects of preventing local lesions and preventing stones. It is a new method for treating neuropathy and diabetic foot. Before performing lower limb arterial perfusion therapy, relevant examinations are required, such as lower limb arterial ultrasound, three foot tests, neurophysiological tests, and five coagulation tests.

[0004] With the development of interventional medicine, lower extremity blood perfusion femoral artery puncture therapy has become a new trend in tumor treatment. It can be performed at the bedside, causing minimal trauma to the patient, allowing effective drug components to directly reach the lesion area, resulting in excellent treatment outcomes. However, current lower extremity blood perfusion femoral artery therapy still has the following problems:

[0005] 1. When a patient undergoes interventional treatment, a catheter needs to be inserted into the artery for treatment. After the treatment, the catheter needs to be removed. Because the femoral artery in the lower limb is thicker and the arterial blood pressure is higher, in order to prevent the patient from bleeding, it is necessary to press the wound for a long time, which is troublesome and laborious. Or special medical instruments may be needed to press the wound, which requires additional payment and is not very friendly to the patient.

[0006] 2. When patients undergo interventional treatment, therapeutic drugs need to be injected into them through an infusion tube. However, most existing femoral artery catheters for lower limb blood perfusion have infusion tubes that are externally located and directly exposed to air. During storage, these tubes are prone to bacterial contamination, which can easily enter the body along with the therapeutic drugs during subsequent treatment, leading to bloodstream infections.

[0007] 3. When patients undergo interventional treatment, in order to prevent the catheter from being inserted too deeply, the insertion depth of the femoral artery catheter for lower limb blood perfusion is mostly determined by changing the shape of the balloon. The insertion length cannot be determined, and the inserted catheter tip may approach the blood vessel branch, increasing the risk of catheter blockage. At the same time, it is easy to puncture the posterior wall of the blood vessel, causing damage to the vascular intima and increasing the risk of thrombosis. Summary of the Invention

[0008] In view of the problems of long hemostasis and healing recovery time of arterial wounds in existing technologies, infection during treatment and injection, excessive insertion depth causing intimal damage and increased thrombosis, a femoral artery cannulation assembly for providing blood perfusion to the lower limbs is proposed.

[0009] This application provides a femoral artery cannulation assembly for providing blood perfusion to the lower limbs, the purpose of which is to ensure that the blood is not infected by external bacteria during patient treatment, shorten the healing time of arterial wounds, and reduce thrombus formation.

[0010] The technical solution of the present invention is: a femoral artery cannulation assembly for providing lower limb blood perfusion, comprising a cannula for lower limb artery placement therapy and a guidewire disposed through the middle of the cannula, and further comprising a hemostasis unit, an injection unit and an insertion unit;

[0011] The hemostasis unit is located at one end of the cannula and is used to connect the inserted lower limb arterial cannula;

[0012] The hemostasis unit includes: a sealing component disposed at one end of the cannula for supporting the patient's lower limb artery during cannula insertion; the sealing component includes a connector disposed at one end of the cannula, a movable hole disposed at the top of the connector, a semi-circular sealing plate disposed at the bottom of the movable hole, a telescopic rod disposed at the top of the semi-circular sealing plate, a separation block disposed at the top of the telescopic rod, and limiting holes disposed on both sides of the separation block;

[0013] The storage component, located at the top inside the movable orifice, is used to seal the wound on the outer wall of the artery with harmless absorbable material stored inside when the catheter is removed from the patient.

[0014] The injection unit is located on one side of the hemostasis unit and is used to disinfect the injection port;

[0015] The insertion unit is disposed on the cannula and is used to determine the insertion depth of the cannula.

[0016] Using the above technical solution, the separating block is limited by the limiting hole in the movable hole. The telescopic rod and the crescent-shaped sealing plate are fixedly connected. The top of the telescopic rod is connected to the separating block. The material of the connection part between the telescopic rod and the separating block is chain-like, which provides better and more stable sealing and separation of the crescent-shaped sealing plate. The crescent-shaped sealing plate is divided into two parts to seal the movable hole. When the crescent-shaped sealing plate opens, it enters the interior of the connector, causing the movable hole to open. Through the up-and-down movement of the separating block and the limiting hole, the telescopic rod drives the crescent-shaped sealing plate to open or close in the movable hole.

[0017] Furthermore, the storage component includes a filling layer disposed at the top of the movable hole, an injection body disposed inside the filling layer, the injection body being higher than the filling layer by - mm, the injection body being snapped into the filling layer, a wire hole penetrating through the middle of the injection body, a sealing element disposed at the top of the wire hole, a storage container disposed at the bottom of the wire hole, the wire hole penetrating through the top of the storage container to form a hole, a gel-like coagulation material disposed inside the storage container, and snapping blocks disposed on both sides of the bottom end of the storage container, the wire hole, the storage container, and the sealing element being coaxial.

[0018] Using the above technical solution, the clamping block and the separating block are clamped together by pressing the injection body. Then, the seal is removed, and the guide wire is inserted through the lead wire hole to deliver the gel-like coagulation material into the outer wall of the patient's blood vessel through the cannula. Then, the guide wire and the cannula are pulled out. The gel-like coagulation material stored in the storage container is spherical when stored, but becomes an inverted pear shape when used on the patient. The gel-like coagulation material is a human-absorbable and harmless gelatin chitosan. It adheres to the surface of the blood vessel wall. When the blood encounters the gel-like coagulation material, it promotes blood coagulation, accelerates hemostasis, and promotes vascular endothelial growth. It can be completely absorbed in the body.

[0019] Furthermore, the injection unit includes: a protective shell disposed on one side of the top of the connector; an injection component disposed on the protective shell, the injection component being used to control the opening and closing of the injection port during patient treatment to improve the treatment effect; an opening and closing component disposed on the protective shell, the opening and closing component being used to protect the injection port; and a disinfection component disposed on the opening and closing component, the disinfection component being used to disinfect the injection port after injection.

[0020] Furthermore, the injection component includes an injection tube disposed inside the protective housing, a ball valve rotatably disposed inside the injection tube, the ball valve having a "T"-shaped opening, a control rod disposed at one end of the ball valve, the control rod penetrating the protective housing and being rotatably connected, a lever handle disposed at the end of the control rod away from the ball valve, and a delivery tube disposed at the bottom end of the injection tube.

[0021] Using the above technical solution, rotating the lever drives the control lever to rotate, which in turn drives the ball valve to rotate. This allows the ball valve to deliver the medication to the affected area through the delivery tube, resulting in better treatment outcomes. The ball valve is designed in a "T" shape, which allows for better and more comprehensive disinfection of the injection components when no medication is being administered.

[0022] Furthermore, the opening and closing component includes a pressing roller disposed on the protective shell, a transmission rack disposed on the pressing roller, the transmission rack being disposed in the inner cavity of the protective shell, a rotating gear disposed on the transmission rack, a transmission rod disposed at the top of the rotating gear, a transmission gear disposed at the middle of the top of the transmission rod, the rotating gear, the transmission rod and the transmission gear being coaxial, driven gears disposed on both sides of the transmission gear, the driven gears being respectively disposed on the upper and lower end faces of the side of the transmission gear, a sealing plate disposed on the driven gear, and an adding port disposed at the middle of the top of the sealing plate. The sealing plate is divided into two pieces, which mesh with the driven gears on both sides of the transmission gear respectively. The joint of the two sealing plates is staggered to form a sealed space. The two sealing plates are separated by the axis of the transmission gear. A resettable protective film is provided at the top of the adding port.

[0023] Using the above technical solution, when a patient needs to receive an injection of therapeutic drugs, the pressing roller drives the transmission rack to move. When the transmission rack moves, it meshes with the rotating gear to rotate. When the rotating gear rotates, it drives the transmission gear to rotate through the transmission rod. When the transmission gear rotates, it drives the driven gears on both sides to rotate. When the driven gears rotate, it drives the sealing plate to open. The repositionable protective film inside the injection port has a cross-shaped opening, and the joints of the cross-shaped openings have a 1-2mm overlap.

[0024] Furthermore, the disinfection component includes a compression spring located at the upper and lower interfaces of the joint between the two sealing plates, a push rod located on the compression spring, a pressure rod located at the bottom of the push rod, a U-shaped force collector located at the end of the pressure rod away from the push rod, a rebound spring located at the top of the U-shaped force collector, a squeezer located at the end of the U-shaped force collector away from the pressure rod, a disinfection device located at the end of the squeezer away from the U-shaped force collector, and a liquid outlet located at the bottom of the disinfection device. The pushing end of the push rod has a 30° angle, and the pushing end of the pressure rod has a 60° angle. The push rod in one sealing plate overlaps with the pressure rod in the other sealing plate, and the overlap length is only the joint between the two sealing plates.

[0025] Using the above technical solution, when the sealing plate is opened, the push rod, under the pressure of the compression spring, has its push end coinciding with the push end of the pressure rod. After the treatment drug is injected, pressure is applied to the sealing plates on both sides, causing the push rod to squeeze the pressure rod. The pressure rod drives the U-shaped force collector to squeeze backward. As the U-shaped force collector moves, it drives the extruder to move, which then squeezes the sterilizer. After the sterilizer is squeezed, the internal disinfectant is sprayed out through the outlet. The disinfectant does not harm the blood and is safe and volatile, so it will not affect the next injection of treatment drug. The sealing plate is closed by manual pressure. During the closing process, since the contact ends of the push rod and the pressure rod are both angled, when the two sealing plates are closed, the pressure rod is subjected to the rebound pressure of the rebound spring at the tail end and external pressure. The push rod separates through the angle of the contact part, causing the pressure rod to push the push rod back to its original position, and the sealing plate seals the injection tube.

[0026] Furthermore, the insertion unit includes a first airbag disposed on the cannula, a ring mark disposed on the surface of the cannula, a side hole disposed on the cannula, and a second airbag disposed on the connector. The first airbag is pear-shaped. The ring mark is disposed every 5 cm, with the last one being the insertion depth limit. The side holes are distributed at multiple angles on the cannula. The second airbag deforms as the insertion depth of the cannula increases.

[0027] Using the above technical solution, the first airbag is soft and deforms as the cannula is inserted. At the same time, the second airbag also deforms. The deformation of the second airbag is used to determine the position of the cannula. In addition, because a side hole is provided, necrosis will not occur due to prolonged ischemia of the lower limbs during patient treatment. The setting of the ring ensures that thrombosis will not occur due to excessive insertion of the cannula.

[0028] The beneficial effects of this invention are:

[0029] 1. A gel-like coagulation material is inserted into the outer wall of the artery, forming a pear shape that adheres tightly to the vessel wall. After the cannula is removed, blood enters the opening and triggers coagulation. This eliminates the need for prolonged pressure on the wound or external medical devices. Routine infection prevention and bandaging of the wound are sufficient. Due to the absorbability of the gel-like coagulation material, the healing and recovery time is shortened, resulting in better wound healing and treatment outcomes.

[0030] 2. By protecting and disinfecting the injection site, the risk of external bacterial infection of the injection tube is greatly reduced. It can be repeatedly filled with disinfectant that meets the regulations and will not affect the blood, making the effect of multiple drug treatments on patients better. It will not cause infection of the patient's blood due to external risks, resulting in better treatment effect.

[0031] 3. The use of airbags and rings improves the determination of the deepest limit and insertion depth of the cannula, preventing damage to the vascular endothelium caused by excessive insertion and increasing the risk of thrombus formation. In addition, the multi-angle side tubes improve blood flow in the patient's lower limbs during use, preventing necrosis and other irreversible damage caused by long-term ischemia in the lower limbs. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0033] Figure 2 This is a schematic cross-sectional view of the connector structure of the present invention;

[0034] Figure 3 This is a schematic cross-sectional view of the hemostasis unit of the present invention;

[0035] Figure 4 This is a schematic cross-sectional view of the sealing component of the present invention;

[0036] Figure 5 This is a schematic diagram of the placement structure of the gel-like coagulation material of the present invention;

[0037] Figure 6 This is a schematic diagram of the cross-sectional structure of the gel-like coagulation material of the present invention.

[0038] Figure 7 This is a schematic diagram of the liquid injection unit structure of the present invention;

[0039] Figure 8 This is a schematic cross-sectional view of the injection unit of the present invention;

[0040] Figure 9 This is a schematic diagram showing the position and structure of the opening / closing component and the disinfection component of the present invention;

[0041] Figure 10 This is a schematic diagram showing the detailed structure of the opening and closing component of the present invention;

[0042] Figure 11 This is a schematic diagram showing the added opening details of the present invention;

[0043] Figure 12 This is a schematic diagram showing the positional relationship of the disinfection components of the present invention;

[0044] Figure 13 This is a schematic diagram showing the positional relationship between the compression spring, push rod, and pressure rod of the present invention.

[0045] Figure 14 This is a schematic diagram of the overall structure of the disinfection component of the present invention.

[0046] In the picture:

[0047] 1. Cannula; 2. Guidewire; 3. Hemostasis Unit; 31. Sealing Component; 311. Connector; 312. Movable Hole; 313. Half-moon Sealing Plate; 314. Telescopic Rod; 315. Separation Block; 316. Limiting Hole; 32. Storage Component; 321. Filler Layer; 322. Injection Body; 323. Lead Hole; 324. Seal; 325. Container; 326. Gelatinous Coagulation Material; 327. Clamping Block; 4. Injection Unit; 41. Protective Housing; 42. Injection Component; 421. Injection Tube; 422. Ball Valve; 423. Control Rod; 424. Pulse 425. Handle; 43. Conveying pipe; 44. Opening and closing component; 45. Pressing roller; 46. Transmission rack; 47. Rotating gear; 48. Transmission gear; 49. Driven gear; 40. Sealing plate; 41. Adding port; 42. Sterilization component; 43. Compression spring; 44. Push rod; 44. Pressure rod; 45. U-shaped force receiver; 46. Rebound spring; 47. Squeegee; 48. Sterilizer; 59. Liquid outlet; 50. Insertion unit; 51. First airbag; 52. Ring mark; 53. Side hole; 54. Second airbag. Detailed Implementation

[0048] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] Example 1, referring to Figure 1-6 The first embodiment of the present invention provides a femoral artery cannulation assembly for providing lower limb blood perfusion, including a cannula 1 for lower limb artery insertion therapy and a guidewire 2 that is installed through the middle of the cannula 1, and also includes a hemostasis unit 3, an injection unit 4 and an insertion unit 5; the hemostasis unit 3 is connected to one end of the cannula 1 for connecting the inserted lower limb artery cannula 1.

[0050] The hemostasis unit 3 includes: a sealing component 31 connected to one end of the cannula 1 for supporting the patient's lower limb artery when the cannula 1 is inserted; the sealing component 31 includes a connector 311 connected to one end of the cannula 1, a movable hole 312 installed through the top of the connector 311, a crescent-shaped sealing plate 313 installed at the bottom of the movable hole 312, a telescopic pull rod 314 installed at the top of the crescent-shaped sealing plate 313, a separation block 315 installed at the top of the telescopic pull rod 314, and limiting holes 316 provided on both sides of the separation block 315;

[0051] The storage component 32 is installed at the top inside the movable hole 312 and is used to seal the wound on the outer wall of the artery with the stored harmless absorbable material when the intubation tube 1 is removed from the patient; the injection unit 4 is installed on one side of the hemostasis unit 3 and is used to disinfect the injection port; the insertion unit 5 is installed on the intubation tube 1 and is used to determine the insertion depth of the intubation tube 1.

[0052] Specifically, the separating block 315 is limited by the limiting hole 316 in the movable hole 312. The telescopic rod 314 is fixedly connected to the crescent-shaped sealing plate 313. The top of the telescopic rod 314 is connected to the separating block 315. The material of the connection part between the telescopic rod 314 and the separating block 315 is chain-like, which provides better and more stable sealing and separation of the crescent-shaped sealing plate 313. The crescent-shaped sealing plate 313 is divided into two parts to seal the movable hole 312. When the crescent-shaped sealing plate 313 opens, it enters the interior of the connector 311, causing the movable hole 312 to open. Through the up-and-down movement of the separating block 315 and the limiting hole 316, the telescopic rod 314 drives the crescent-shaped sealing plate 313 to open or close in the movable hole 312.

[0053] Reference Figure 4-6 The storage component 32 includes a filling layer 321 installed at the top of the movable hole 312, an injection body 322 installed inside the filling layer 321, the injection body 322 being 5-7 mm higher than the filling layer 321, the injection body 322 being snapped into the filling layer 321, a wire hole 323 penetrating through the middle of the injection body 322, a sealing element 324 at the top of the wire hole 323, a storage container 325 at the bottom of the wire hole 323, the wire hole 323 penetrating through the top of the storage container 325 to form a hole, a gel-like coagulation material 326 disposed inside the storage container 325, and snap-fit ​​blocks 327 installed on both sides of the bottom end of the storage container 325. The wire hole 323, the storage container 325, and the sealing element 324 are on the same axis.

[0054] Specifically, by pressing the injection body 322, the locking block 327 and the separating locking block 315 are locked together. Then, the sealing piece 324 is removed, and the guide wire 2 is inserted through the wire hole 323 to send the gel-like coagulation material 326 into the outer wall of the patient's blood vessel through the cannula 1. Then, the guide wire 2 and the cannula 1 are pulled out. The gel-like coagulation material 326 stored in the storage container 325 is spherical when stored, and is inverted pear-shaped when used on the patient. The gel-like coagulation material 326 is a human-absorbable and harmless gelatin chitosan. It adheres to the surface of the blood vessel wall. When the blood encounters the gel-like coagulation material 326, it promotes blood coagulation, accelerates hemostasis, and promotes the growth of vascular endothelium. It can be completely absorbed in the body.

[0055] During use, pressing the injection body 322 causes the locking block 327 and the separating locking block 315 to engage with each other. The separating locking block 315 drives the telescopic rod 314 to move into the connector 311, thereby causing the crescent sealing plate 313 to retract into the connector 311. Then, the seal 324 is removed, and the guide wire 2 is inserted through the wire hole 323 to send the gel-like coagulation material 326 into the outer wall of the patient's blood vessel through the cannula 1.

[0056] Example 2, refer to Figure 2 and Figure 7-8 This is the second embodiment of the present invention, which differs from the first embodiment in that: the injection unit 4 includes: a protective shell 41 installed on one side of the top of the connector 311; an injection component 42 installed on the protective shell 41, the injection component 42 being used to control the opening and closing of the injection port during patient treatment to improve the treatment effect; an opening and closing component 43 installed on the protective shell 41, the opening and closing component 43 being used to protect the injection port; and a disinfection component 44 installed on the opening and closing component 43, the disinfection component 44 being used to disinfect the injection port after injection.

[0057] The injection component 42 includes an injection tube 421 installed inside the protective housing 41, a ball valve 422 rotatably installed inside the injection tube 421 with a "T" shaped opening, a control rod 423 installed at one end of the ball valve 422, the control rod 423 passing through the protective housing 41 and rotatably connected, a lever handle 424 installed at the end of the control rod 423 away from the ball valve 422, and a delivery tube 425 provided at the bottom end of the injection tube 421.

[0058] Specifically, by rotating the lever 424, the control lever 423 is driven to rotate, and the rotation of the control lever 423 drives the ball valve 422 to rotate, so that the ball valve 422 can deliver the medication for treating the patient to the affected area through the delivery tube 425, thereby improving the treatment effect for the patient. The ball valve 422 is designed in a "T" shape, which makes the disinfection of the injection component 42 more effective and comprehensive when no medication is being administered.

[0059] Reference Figure 7-11 The opening / closing component 43 includes a pressing roller 431 mounted on the protective housing 41, a transmission rack 432 mounted on the pressing roller 431, the transmission rack 432 being disposed in the inner cavity of the protective housing 41, a rotating gear 433 meshing with the transmission rack 432, a transmission rod 434 mounted on the top of the rotating gear 433, a transmission gear 435 meshing with the middle of the top of the transmission rod 434, the rotating gear 433, the transmission rod 434, and the transmission gear 435 being on the same axis, and driven gears 43 on both sides of the transmission gear 435 meshing with each other. 6. The driven gears 436 are respectively located on the upper and lower end faces of the transmission gear 435. The closed plate 437 connected to the driven gear 436 has an addition port 438 at the top center of the closed plate 437. The closed plate 437 is divided into two parts, which are respectively meshed with the driven gears 436 on both sides of the transmission gear 435. The two closed plates 437 are staggered at the joint to form a sealed space. The two closed plates 437 are separated by the axis of the transmission gear 435. The top of the addition port 438 is provided with a resettable protective film.

[0060] Specifically, when a patient needs to receive an injection of therapeutic medication, the pressing roller 431 drives the transmission rack 432 to move. When the transmission rack 432 moves, it drives the rotating gear 433 to rotate. When the rotating gear 433 rotates, it drives the transmission gear 435 to rotate via the transmission rod 434. When the transmission gear 435 rotates, it drives the driven gears 436 on both sides to rotate. When the driven gears 436 rotate, they drive the sealing plate 437 to open. The resetting protective film inside the injection port 438 has a cross-shaped opening, and the joints of the cross-shaped openings have a 1-2mm overlap.

[0061] Reference Figure 12-14 The disinfection component 44 includes a compression spring 441 installed at the upper and lower interfaces of the joint between the two side sealing plates 437, a push rod 442 installed on the compression spring 441, a pressure rod 443 installed at the bottom of the push rod 442, a U-shaped force receiver 444 installed at the end of the pressure rod 443 away from the push rod 442, a rebound spring 445 installed at the top of the U-shaped force receiver 444, a squeezer 446 installed at the end of the U-shaped force receiver 444 away from the pressure rod 443, and a disinfection device 447 installed at the end of the squeezer 446 away from the U-shaped force receiver 444. The disinfection device 447 has an outlet 448 at the bottom. The pushing end of the push rod 442 has an angle of 30°, and the pushing end of the pressure rod 443 has an angle of 60°. The push rod 442 in one side sealing plate 437 overlaps with the pressure rod 443 in the other side sealing plate 437, and the overlap length is only the joint between the two side sealing plates 437.

[0062] Specifically, when the sealing plate 437 is opened, the push rod 442, under the pressure of the compression spring 441, has its push end coinciding with the push end of the pressure rod 443. After the treatment drug is injected, pressure is applied to the sealing plates 437 on both sides, causing the push rod 442 to squeeze the pressure rod 443. The pressure rod 443 then drives the U-shaped force receiver 444 to squeeze backward. As the U-shaped force receiver 444 moves, it drives the squeezer 446 to move. The squeezer 446 squeezes the sterilizer 447. After the sterilizer 447 is squeezed, the disinfectant inside is sprayed out through the outlet 448. The venom does not harm the blood, and the disinfectant is safe and volatile, so it will not affect the next injection of treatment drugs. The sealing plate 437 is closed by manual pressure. During the closing process of the sealing plate 437, since the contact ends of the push rod 442 and the pressure rod 443 are both angled, when the two sealing plates 437 are closed, the pressure rod 443 is subjected to the rebound pressure of the rebound spring 445 at the tail end and the external pressure. The push rod 442 separates through the angle of the contact part, so that the pressure rod 443 pushes the push rod 442 back to its original position. The sealing plate 437 seals the injection tube 421.

[0063] During use, the pressing roller 431 drives the transmission rack 432 to move. As the transmission rack 432 moves, it drives the rotating gear 433 to rotate. The rotating gear 433, in turn, drives the transmission gear 435 to rotate via the transmission rod 434. The rotation of the transmission gear 435 drives the driven gears 436 on both sides to rotate. The rotation of the driven gears 436 opens the sealing plate 437. When the sealing plate 437 opens, the push rod 442, under the pressure of the compression spring 441, has its push end aligning with the push end of the pressure rod 443. Then, by rotating the lever 424, the control rod 423 rotates. The rotation of the control rod 423, in turn, drives the ball valve 422 to rotate, allowing the ball valve 422 to deliver the medication to the affected area through the delivery pipe 425. After treatment, pressure is applied to the sealing plates 437 on both sides, and the push rod 442 squeezes the pressure rod 443. The pressure rod 443 drives the U-shaped force receiver 444 to squeeze backward. When the U-shaped force receiver 444 moves, it drives the squeezer 446 to move. The squeezer 446 squeezes the sterilizer 447. After the sterilizer 447 is squeezed, the disinfectant inside is sprayed out through the outlet 448. Then, pressure is continued to be applied. Since the contact ends of the push rod 442 and the pressure rod 443 are both angled, when the two sealing plates 437 are combined, when the pressure rod 443 is subjected to the rebound pressure of the rebound spring 445 at the tail end and the external pressure, the push rod 442 separates through the angle of the contact part, so that the pressure rod 443 pushes the push rod 442 back to its original position, and the sealing plate 437 seals the injection tube 421.

[0064] The remaining structure is the same as that in Example 1.

[0065] Example 3, referring to Figure 1 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that: the insertion unit 5 includes a first airbag 51 installed on the cannula 1, a ring 52 installed on the surface of the cannula 1, a side hole 53 installed on the cannula 1, and a second airbag 54 installed on the connector 311. The first airbag 51 is pear-shaped. The ring 52 is set every 5 cm, and the last one is the insertion depth limit. The side holes 53 are distributed at multiple angles on the cannula 1. The second airbag 54 deforms with the insertion depth of the cannula 1.

[0066] Specifically, the first airbag 51 is soft and deforms as the cannula 1 is inserted. At the same time, the second airbag 54 also deforms. The deformation of the second airbag 54 is used to determine the insertion position of the cannula 1. In addition, because a side hole 53 is provided, necrosis will not occur due to prolonged ischemia of the lower limbs during patient treatment. The ring 52 ensures that thrombosis will not occur due to excessive insertion of the cannula.

[0067] The remaining structure is the same as that in Example 2.

[0068] Working principle: When using the device, the cannula 1 is inserted into the patient's lower limb artery. During insertion, the ring 52, the first airbag 51, and the second airbag 54 work together to ensure precise insertion depth of the cannula 1, preventing damage to the lower limb artery due to excessive insertion, which could lead to endothelial damage and increase the risk of thrombosis. Simultaneously, the multi-angle design of the side holes 53 effectively prevents damage caused by lower limb ischemia. After cannula 1 is inserted, when treatment is needed, the pressing roller 431 moves the transmission rack 432, which in turn rotates the gear 433. When the rotating gear 433 rotates, it drives the transmission gear 435 to rotate via the transmission rod 434. The rotation of the transmission gear 435 drives the driven gears 436 on both sides to rotate. The rotation of the driven gears 436 causes the closing plate 437 to open. When the closing plate 437 opens, the push rod 442, under the pressure of the compression spring 441, has its push end aligning with the push end of the pressure rod 443. Then, by rotating the lever 424, it drives the control rod 423 to rotate. The rotation of the control rod 423, in turn, drives the ball valve 422 to rotate, allowing the ball valve 422 to deliver the medication to the affected area through the delivery pipe 425. After treatment, the closing plates on both sides... Pressure is applied to push rod 442, which squeezes pressure rod 443. Pressure rod 443 drives U-shaped force collector 444 to squeeze backward. As U-shaped force collector 444 moves, it drives extruder 446 to move. Extruder 446 squeezes sterilizer 447. After being squeezed, sterilizer 447 sprays out disinfectant through outlet 448. Pressure is then applied. Since the contact ends of push rod 442 and pressure rod 443 are both angled, when the two closed plates 437 are closed, pressure rod 443 is subjected to the rebound pressure of the rebound spring 445 at the tail end and external pressure. Push rod 442 separates through the angle of the contact part, causing pressure rod 443 to push push rod 442. Returning to its original position, the sealing plate 437 seals the injection tube 421. Before removing the device after treatment, press the injection body 322 to engage the locking block 327 and the separating locking block 315. Press down the injection body 322 to open the telescopic pull rod 314 at the bottom of the separating locking block 315 and the crescent sealing plate 313 in the movable hole 312. The separating locking block 315 is limited by the limiting hole 316 in the movable hole 312, making the crescent sealing plate 313 open more smoothly. Then, the guide wire 2 is inserted through the wire hole 323. The gelatinous coagulation material 326 is sent into the outer wall of the patient's blood vessel through the cannula 1 through the guide wire 2. Then, the guide wire 2 and the cannula 1 are pulled out.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A femoral arterial cannulation assembly for providing lower extremity blood perfusion comprising a cannula for placement into an artery of a lower extremity for treatment and a guidewire disposed through a mid-portion of the cannula, wherein: It also includes a hemostasis unit, an injection unit, and an insertion unit; The hemostasis unit is located at one end of the cannula and is used to connect the inserted lower limb arterial cannula; The hemostasis unit includes: a sealing component disposed at one end of the cannula for supporting the patient's lower limb artery during cannula insertion; the sealing component includes a connector disposed at one end of the cannula, a movable hole disposed at the top of the connector, a semi-circular sealing plate disposed at the bottom of the movable hole, a telescopic rod disposed at the top of the semi-circular sealing plate, a separation block disposed at the top of the telescopic rod, and limiting holes disposed on both sides of the separation block; The storage component, located at the top inside the movable orifice, is used to seal the wound on the outer wall of the artery with harmless absorbable material stored inside when the catheter is removed from the patient. The injection unit is located on one side of the hemostasis unit and is used to disinfect the injection port; The insertion unit is disposed on the cannula and is used to determine the insertion depth of the cannula; The storage component includes a filling layer disposed at the top of the movable hole, an injection body disposed inside the filling layer, the injection body being 5-7 mm higher than the filling layer, the injection body being snapped into the filling layer, a wire hole penetrating through the middle of the injection body, a sealing element disposed at the top of the wire hole, a storage container disposed at the bottom of the wire hole, the wire hole penetrating through the top of the storage container to form a hole, a gel-like coagulation material disposed inside the storage container, and snapping blocks disposed on both sides of the bottom end of the storage container. The wire hole, the storage container, and the sealing element are on the same axis. The injection unit includes: a protective shell disposed on one side of the top of the connector, and an injection component disposed on the protective shell. The injection component is used to control the opening and closing of the injection port during patient treatment to improve the treatment effect. An opening and closing component is provided on the protective shell to protect the injection port; The disinfection component is installed on the opening and closing part and is used to disinfect the injection port after injection. The injection component includes an injection tube disposed inside a protective housing, a rotatable ball valve disposed inside the injection tube, the ball valve having a "T" shaped opening, a control rod disposed at one end of the ball valve, the control rod passing through the protective housing and being rotatably connected, a lever handle disposed at the end of the control rod away from the ball valve, and a delivery tube disposed at the bottom end of the injection tube. The opening and closing component includes a pressing roller mounted on the protective housing, a transmission rack mounted on the pressing roller, the transmission rack being located within the inner cavity of the protective housing, a rotating gear mounted on the transmission rack, a transmission rod mounted at the top of the rotating gear, a transmission gear mounted at the middle of the top of the transmission rod, the rotating gear, the transmission rod, and the transmission gear being on the same axis, driven gears mounted on both sides of the transmission gear, the driven gears being located on the upper and lower end faces of the side of the transmission gear, a closing plate mounted on the driven gear, and an adding port located at the middle of the top of the closing plate.

2. A femoral arterial cannula assembly for providing lower extremity blood perfusion according to claim 1, characterized in that: The sealing plate is divided into two parts, which are respectively meshed with the driven gears on both sides of the transmission gear. The two sealing plates are staggered at the joint to form a sealed space. The two sealing plates are separated by the axis of the transmission gear. The top of the filling port is provided with a resettable protective film.

3. The femoral artery cannulation assembly for providing lower limb blood perfusion according to claim 2, characterized in that: The disinfection component includes a compression spring located at the upper and lower interfaces of the junction of the two side sealing plates, a push rod located on the compression spring, a pressure rod located at the bottom of the push rod, a U-shaped force collector located at the end of the pressure rod away from the push rod, a rebound spring located at the top of the U-shaped force collector, a squeezer located at the end of the U-shaped force collector away from the pressure rod, a disinfection device located at the end of the squeezer away from the U-shaped force collector, and a liquid outlet located at the bottom of the disinfection device.

4. The femoral artery cannulation assembly for providing lower limb blood perfusion according to claim 3, characterized in that: The push end of the push rod has a 30° angle, and the push end of the pressure rod has a 60° angle. The push rods in one side of the sealing plate overlap with the pressure rods in the other side of the sealing plate, and the overlap length is only the joint of the two sealing plates.

5. A femoral artery cannulation assembly for providing lower limb blood perfusion according to claim 4, characterized in that: The insertion unit includes a first airbag disposed on the cannula, a ring mark disposed on the surface of the cannula, a side hole disposed on the cannula, and a second airbag disposed on the connector.

6. A femoral artery cannulation assembly for providing lower limb blood perfusion according to claim 5, characterized in that: The first airbag is pear-shaped, and the ring is set every 5cm, with the last one being the insertion depth limit. The side holes are distributed at multiple angles on the cannula, and the second airbag deforms as the insertion depth of the cannula increases.

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