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WO2025055832A1 - Cathéter d'aspiration à extension, système de cathéter et procédé - Google Patents

Cathéter d'aspiration à extension, système de cathéter et procédé Download PDF

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Publication number
WO2025055832A1
WO2025055832A1 PCT/CN2024/117545 CN2024117545W WO2025055832A1 WO 2025055832 A1 WO2025055832 A1 WO 2025055832A1 CN 2024117545 W CN2024117545 W CN 2024117545W WO 2025055832 A1 WO2025055832 A1 WO 2025055832A1
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
catheter body
layer
channel
push rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/117545
Other languages
English (en)
Chinese (zh)
Inventor
张志军
刘朝生
乔轩
谭睿哲
周威
黄琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BROSMED MEDICAL Co Ltd
Brosmed Neurotec Co Ltd
Original Assignee
BROSMED MEDICAL Co Ltd
Brosmed Neurotec Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202322465547.6U external-priority patent/CN221787839U/zh
Priority claimed from CN202410667865.7A external-priority patent/CN118542982A/zh
Priority claimed from CN202421176251.0U external-priority patent/CN223287214U/zh
Priority claimed from CN202410667874.6A external-priority patent/CN118477216A/zh
Priority claimed from CN202421477538.7U external-priority patent/CN222930166U/zh
Priority claimed from CN202421479506.0U external-priority patent/CN223392755U/zh
Application filed by BROSMED MEDICAL Co Ltd, Brosmed Neurotec Co Ltd filed Critical BROSMED MEDICAL Co Ltd
Publication of WO2025055832A1 publication Critical patent/WO2025055832A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters

Definitions

  • the present application relates to the field of medical devices, and in particular to an extended suction catheter, a catheter system and a method.
  • PCI Percutaneous transluminal coronary intervention
  • the extension catheter is guided by the guide catheter, which can more deeply treat the side branches and lesions far away from the aorta.
  • the guide catheter will be delivered to the location of the larger blood vessel close to the small blood vessel, and then the guide wire will be passed through the guide catheter and delivered to the thrombus in the small blood vessel.
  • the extension catheter is placed on the guide wire and follows the guide wire to the target area, and then suction is performed.
  • this method has the following problems: For distal small blood vessels, an extension catheter is required.
  • the first object of the present application is to provide an extended suction catheter with a smooth suction passageway that can prevent the guide wire from affecting the effective suction area of the lumen.
  • the second object of the present application is to provide a catheter system having an extended suction catheter with a smooth suction passage and capable of preventing the guide wire from affecting the effective suction area of the lumen.
  • the third object of the present application is to provide a method for thrombus aspiration using a catheter system to remove thrombus from a blood vessel.
  • a fourth object of the present application is to provide a method for performing a medical procedure in a body vessel using a catheter system to remove a thrombus from the vessel.
  • a fifth object of the present application is to provide a method for placing an extended aspiration catheter of a catheter system into a narrow and tortuous blood vessel of the body to remove a thrombus from the blood vessel.
  • the present application provides an extended suction catheter, including a catheter body, a push rod, a sealing balloon and a guide wire tube, wherein the catheter body is provided with a delivery channel for delivering medical devices, and the proximal end of the catheter body is provided with an introduction port connected to the delivery channel; the distal end of the push rod is connected to the proximal end of the catheter body, and the interior of the push rod is provided with a filling channel; the sealing balloon is sleeved on the catheter body and located near the proximal end of the catheter body, and the inner cavity of the sealing balloon is connected to the filling channel; the guide wire tube is arranged on the catheter body, and a guide wire cavity for the guide wire to pass through is provided in the guide wire tube.
  • the intermediate reinforcement layer is a woven mesh layer, a spring layer or a spiral cut tube layer.
  • the catheter body is divided into a compliant zone, a transition zone and a push zone in sequence from the distal end to the proximal end, and the hardness of the compliant zone, the transition zone and the push zone increases in sequence.
  • the length of the compliant zone is 1-30 cm, or the length of the transition zone is 2-50 cm, or the length of the push zone is 5-50 cm.
  • the intermediate reinforcement layer is a woven mesh layer
  • the PPI of the proximal end of the woven mesh layer is greater than PPI at the distal end
  • the intermediate reinforcement layer is a spring layer
  • the pitch of the proximal end of the spring layer is greater than the pitch of the distal end
  • the spirally cut tube layer is divided into a compliant zone, a transition zone and a push zone in sequence along the direction from the distal end to the proximal end of the catheter body, and the compliant zone, the transition zone and the push zone satisfy at least one of the following characteristics; the slit length of the spirally cut tube layer in the compliant zone > the slit length of the spirally cut tube layer in the transition zone > the slit length of the spirally cut tube layer in the push zone; or, the cutting spacing of the spirally cut tube layer in the compliant zone ⁇ the cutting spacing of the spirally cut tube layer in the transition zone ⁇ the cutting spacing of the spirally cut tube layer in the push zone; or, the slit angle of the spirally cut tube layer in the compliant zone ⁇ the slit angle of the spirally cut tube layer in the transition zone ⁇ the slit angle of the spirally cut tube layer in the push zone; or, the pitch of the spirally cut tube layer in the compliant zone ⁇ the pitch of the spirally cut tube layer in
  • the hardness of the outer layer decreases from the proximal end to the distal end of the catheter body.
  • the catheter body is provided with a metal connector at the proximal end of the intermediate reinforcement layer, the distal end of the push rod is connected to one end of the metal connector, and the other end of the metal connector is arranged in parallel with the intermediate reinforcement layer or connected to the intermediate reinforcement layer.
  • the metal connector is a metal ring arranged side by side along the axial direction of the catheter body, or the metal connector is in a spiral structure, or the metal connector includes a connecting plate and a plurality of connecting strips connected to opposite sides of the connecting plate, the connecting plate and each of the connecting strips are connected to the middle reinforcement layer, the push rod is connected to the connecting plate, and each of the connecting strips is wrapped and connected to the inner layer.
  • the metal connector is welded to the distal end of the push rod to form a welding area, and the diameter of the push rod is reduced at the welding connection between the metal connector and the push rod.
  • a first developing member is provided at the distal end of the push rod, and the first developing member is a filament made of a developing material that is opaque to X-rays, and the developing material is one or more of gold wire, tungsten wire, platinum wire, and platinum-iridium alloy wire.
  • the push rod is a metal tube or a plastic tube with a metal reinforcement layer.
  • first angle between the end face of the introduction port and the cross-section of the catheter body in the radial direction
  • size of the first angle is in the range of 0-150°
  • second angle between the end face of the distal suction port of the catheter body and the cross-section of the catheter body in the radial direction
  • size of the second angle is in the range of 0-150°
  • the distal end of the push rod is fixed in the tube wall of the catheter body, and a through hole is provided at a position of the push rod close to the proximal end of the catheter body, and the through hole is connected between the filling channel and the inner cavity of the sealing balloon.
  • the wire guide tube is arranged on the outer wall of the catheter body, and the wire guide tube is connected in parallel with the catheter body along the catheter direction of the catheter body.
  • the proximal end of the guide wire tube exceeds the sealing balloon, and the distal end of the guide wire tube extends to the distal end of the catheter body, or the proximal end of the guide wire tube is located on the distal end side of the sealing balloon, and the distal end of the guide wire tube extends to the distal end of the catheter body.
  • the catheter body and the wire guide tube are separately arranged, or the catheter body and the wire guide tube are integrally arranged.
  • the outer surface of the guide wire tube is provided with a hydrophilic layer; or/and the guide wire tube is provided with a hydrophobic layer on the inner wall of the guide wire cavity; or/and the surface of the catheter body and the surface of the sealing balloon are both provided with a hydrophilic coating; or/and the surface of the push rod is provided with a hydrophobic coating.
  • the extended suction catheter further comprises a catheter seat, the distal end of the catheter seat is connected to the proximal end of the pushing rod, a through channel is provided in the catheter seat, and the through channel is communicated with the filling channel.
  • the proximal end of the through channel forms a Luer connector on the catheter seat, and the Luer connector is connected to a component with a one-way seal or a heparin cap; or, the proximal end of the through channel is connected to a component with a one-way seal or a heparin cap.
  • a third developing member is provided at the proximal end of the catheter body, and the third developing member is located inside the sealing balloon.
  • the present application provides a catheter system, including a guiding catheter and the above-mentioned extended suction catheter, wherein a guiding channel is provided in the guiding catheter, and when the sealing balloon is not inflated, the extended suction catheter slides in the guiding channel; when the sealing balloon is inflated, the sealing balloon expands and abuts against the inner wall of the guiding channel, and the delivery channel is connected to the guiding channel.
  • the extended suction catheter is inserted into the guiding channel, and the distal end of the catheter body passes through the distal end of the guiding channel, the proximal end of the catheter body is located in the guiding channel, and the proximal end of the push rod is located outside the proximal end of the guiding channel.
  • the sealing balloon when the sealing balloon is subjected to an inflation pressure of 0.1 bar to 5 bar, the sealing balloon abuts against an inner wall of the guiding channel, and by moving the pushing rod, the sealing balloon can slide in the guiding channel and maintain a sealing effect.
  • a Y-shaped connecting valve is provided at the proximal end of the guiding catheter, and the Y-shaped connecting valve has a first interface and a second interface, the first interface and the second interface are respectively connected to the guiding channel, the guide wire and the extended suction catheter are both inserted into the first interface, and the proximal end of the push rod is located on the outside of the Y-shaped connecting valve.
  • the catheter system further comprises a suction device for aspirating thrombus, wherein the suction device is connected to the second interface and communicates with the guiding channel.
  • the present application provides a method for performing thrombus aspiration using the above-mentioned catheter system, the method comprising: using the guide catheter that extends into the patient's blood vessel in a percutaneous structure to guide the extended aspiration catheter, and after the sealing balloon is expanded, it abuts against the inner wall of the guide channel and maintains a sealing effect, and suction is applied through the guide channel and the delivery channel to aspirate the fluid out of the guide catheter, thereby removing the thrombus from the blood vessel.
  • the present application provides a method for performing a medical procedure in a body blood vessel using the above-mentioned catheter system, wherein the proximal portion of the guide channel is connected to the delivery channel to form a suction cavity, and the method comprises: sliding the extended suction catheter relative to the guide catheter, tracking the extended suction catheter to the desired position in the blood vessel, and applying suction through the suction cavity to remove the thrombus from the blood vessel.
  • the present application provides a method for placing an extended suction catheter of the above-mentioned catheter system into a narrow and curved blood vessel of the body, the method comprising: inserting a guidewire into the guidewire tube, advancing the extended suction catheter on the guidewire and pushing it out through the distal opening of the guide catheter, and after the extended suction catheter extends to a preset length, expanding the sealing balloon so that the sealing balloon abuts against the inner wall of the guide channel.
  • the sealing balloon can slide in the guiding channel and maintain a sealing effect.
  • the beneficial effect of the extended suction catheter provided by the present application is that: compared with the prior art, the extended suction catheter of the present application arranges a guide wire tube on the catheter body, so that the guide wire can pass through the guide wire cavity of the guide wire tube without occupying the area of the delivery channel of the catheter body, thereby ensuring that the suction passage for suction through the delivery channel of the catheter body is smooth, the effective suction area is relatively large, and the guide wire can be prevented from affecting the effective suction area of the lumen.
  • the invention can reduce the influence of thrombus accumulation and improve the suction effect.
  • the guidewire passing through the guidewire cavity can also guide and anchor the catheter body to ensure that the extended suction catheter can be accurately delivered to the target area.
  • the sealing balloon can be filled through the filling channel.
  • the outer wall of the sealing balloon abuts against the inner wall of the inner cavity of the guiding catheter, preventing the pressure from leaking through the gap between the extended suction catheter of the present application and the guiding catheter during the thrombus suction process, so that the extended suction catheter of the present application is effectively connected with the guiding catheter and forms a sealed suction cavity.
  • the new suction channel formed by connecting the extended suction catheter of the present application with the guiding catheter can provide a larger suction channel and a stronger suction force.
  • the extended suction catheter of the present application is not easy to slip without external force.
  • the proximal end of the extended suction catheter of the present application can be pushed to move forward and backward.
  • the beneficial effect of the method for thrombus aspiration using the above-mentioned catheter system provided in the present application is that: compared with the prior art, by utilizing the guide catheter that extends into the patient's blood vessel in a percutaneous structure to guide the extended aspiration catheter, when the extended aspiration catheter is extended along the proximal end of the guide catheter, the proximal end of the push rod can extend from the proximal end of the guide catheter, and the distal end of the catheter body can extend from the distal end of the guide catheter.
  • the proximal end of the catheter body is located in the inner cavity of the guide catheter, and a sealing balloon can be filled through the filling channel.
  • the outer wall of the sealing balloon abuts against the inner wall of the inner cavity of the guide catheter and maintains a sealing effect, ensuring that suction can be applied through the guide channel and the delivery channel to aspirate the fluid out of the guide catheter, thereby removing the thrombus from the blood vessel.
  • the beneficial effect of the method provided by the present application for performing a medical procedure in a body blood vessel using the above-mentioned catheter system is that, compared with the prior art, when the extended suction catheter is extended along the proximal end of the guide catheter, the proximal end of the push rod can be extended from the proximal end of the guide catheter, and the distal end of the catheter body can be extended from the distal end of the guide catheter.
  • the proximal end of the catheter body is located in the inner cavity of the guide catheter, and a sealing balloon can be filled through the filling channel.
  • the sealing balloon After the sealing balloon is expanded, the outer wall of the sealing balloon abuts against the inner wall of the inner cavity of the guide catheter, so that the extended suction catheter of the present application is effectively connected to the guide catheter and forms a sealed suction cavity.
  • the extended suction catheter By sliding the extended suction catheter relative to the guide catheter, the extended suction catheter is tracked to the desired position in the blood vessel, and suction is applied through the suction cavity to effectively remove the thrombus from the blood vessel.
  • the method provided by the present application for placing the extended suction catheter of the above-mentioned catheter system into the narrow and curved blood vessels of the body has the beneficial effect that: compared with the prior art, by inserting a guidewire into the guidewire tube, it is ensured that the extended suction catheter can be accurately delivered to the target area, and at the same time, the extended suction catheter can be advanced on the guidewire and accurately pushed out through the distal opening of the guiding catheter, so that the guidewire does not occupy the area of the delivery channel of the catheter body, ensuring that the suction passage for suction through the delivery channel of the catheter body is smooth, the effective suction area is relatively large, and the guidewire is prevented from affecting the effective suction area of the lumen, and the suction effect is improved.
  • the sealing balloon can be filled through the filling channel.
  • the outer wall of the sealing balloon abuts against the inner wall of the inner cavity of the guiding catheter and maintains the sealing effect, ensuring that suction can be applied through the guide channel and the delivery channel to suck the fluid out of the guiding catheter, thereby removing the thrombus from the blood vessel.
  • FIG. 1 is a structural diagram of the catheter system of the present application.
  • FIG. 2 is a structural diagram of the catheter system of the present application when aspirating thrombus.
  • FIG. 3 is a structural diagram of an extended suction catheter according to an embodiment of the present application.
  • FIG. 4 is a structural diagram of an extended suction catheter at the proximal end of the catheter body according to an embodiment of the present application.
  • FIG. 5 is a cross-sectional view of an extended suction catheter at the proximal end of the catheter body according to an embodiment of the present application.
  • FIG. 6 is an enlarged view of point A in FIG. 5 .
  • FIG. 7 is a cross-sectional view of a catheter body of an extended suction catheter according to an embodiment of the present application.
  • FIG. 8 is a cross-sectional view of a push rod of an extended suction catheter according to an embodiment of the present application.
  • FIG. 9 is a three-dimensional structural diagram of a metal connector of an extended suction catheter according to an embodiment of the present application.
  • FIG. 10 is a cross-sectional view of an extended suction catheter inserted into the interior of a guiding catheter according to an embodiment of the present application.
  • FIG. 11 is a structural diagram of an extended suction catheter according to an embodiment of the present application.
  • Fig. 12 is a cross-sectional view along the B-B direction in Fig. 11 .
  • FIG. 13 is an enlarged view of point D in FIG. 12 .
  • Fig. 14 is a cross-sectional view along the C-C direction in Fig. 11 .
  • FIG. 15 is a cross-sectional view of the extended aspiration catheter shown in FIG. 11 after the guide catheter is inserted.
  • FIG. 16 is a cross-sectional view of the extended aspiration catheter shown in FIG. 11 at the distal end of the catheter body.
  • FIG. 17 is a structural diagram of an extended suction catheter according to an embodiment of the present application.
  • Fig. 18 is a cross-sectional view along the D-D direction in Fig. 17 .
  • Fig. 19 is a cross-sectional view along the E-E direction in Fig. 17 .
  • FIG20 is a cross-sectional view of the second embodiment along the E-E direction in FIG17.
  • Fig. 21 is a cross-sectional view of the third embodiment along the E-E direction in Fig. 17 .
  • Fig. 22 is a cross-sectional view of the fourth embodiment along the E-E direction in Fig. 17 .
  • FIG. 23 is a cross-sectional view of the extended aspiration catheter shown in FIG. 17 after the guide catheter is inserted.
  • FIG. 25 is a structural diagram of the connection between the metal connector and the push rod of the extended suction catheter according to an embodiment of the present application.
  • 26 is a cross-sectional view of a push rod of an extended suction catheter according to an embodiment of the present application.
  • FIG. 27 is a structural diagram of the middle reinforcement layer of the extended suction catheter according to an embodiment of the present application.
  • FIG. 29 is a cross-sectional view of an extended suction catheter according to an embodiment of the present application.
  • the present application sets a guidewire tube 7 on the catheter body 1, so that the guidewire 202 can pass through the guidewire cavity 71 of the guidewire tube 7 without occupying the area of the delivery channel 11 of the catheter body 1, thereby ensuring that the suction path for suction through the delivery channel 11 of the catheter body 1 is smooth, and the effective suction area is relatively large, which can avoid the guidewire 202 from affecting the effective suction area of the lumen and improve the suction effect.
  • the guidewire 202 passing through the guidewire cavity 71 can also guide and anchor the catheter body 1, ensuring that the extended suction catheter 100 can be accurately delivered to the target area.
  • ⁇ P is the pressure difference between the two ends of the catheter
  • L is the overall length of the catheter system
  • Q is the flow rate of the catheter in this case
  • r is the radius of the lumen
  • ⁇ is the viscosity of the liquid.
  • the introduction port 12 can be used as a channel for the entry and exit of instruments, and can also be used as a channel for aspirating the thrombus 300.
  • an external catheter or stent can enter the delivery channel 11 of the catheter body 1 from the introduction port 12 and move through it to the distal end of the catheter body 1.
  • the extended aspiration catheter 100 can be used as a quick-exchange catheter, thereby achieving quick exchange of instruments.
  • the introduction port 12 can also be connected to a syringe through a guiding catheter 201 to facilitate aspiration of the thrombus 300 through the syringe.
  • a second angle is formed between the end face of the distal suction port of the catheter body 1 and the cross section of the catheter body 1 in the radial direction, and the size of the second angle is in the range of 0-150°.
  • the distal end of the catheter body 1 is a beveled suction port.
  • the catheter body 1 includes an inner layer 13, an inner layer 14 and an outer layer 16 arranged in sequence from the inside to the outside.
  • the middle reinforcing layer 14 and the outer layer 15, and the conveying channel 11 are located at the center of the inner layer 13.
  • the three-layer composite structure can provide strong support, pressure resistance and folding resistance.
  • the material of the outer layer 15 is a mixture of one or more polyether front-end polyamide, nylon, and polyurethane elastomer, which ensures that the outer surface of the catheter body 1 has a smoother appearance and feel, and fully protects the blood vessels from easily forming thrombi 300, dissection, etc.
  • the hardness of the outer layer 15 decreases from the proximal end to the distal end of the catheter body 1. This not only avoids deformation, but also makes it easier to pass through tortuous lesions.
  • the distal end is made of flexible material to avoid damage to the blood vessel wall during the pushing process, which better meets the needs of pushing the catheter in the human blood vessels, allowing doctors to operate more accurately and conveniently, and reducing the pain of patients during the operation.
  • the middle reinforcement layer 14 is a woven mesh layer, a spring layer or a spiral cut tube layer, which can improve the strong support, pressure resistance and folding resistance of the extended suction catheter 100.
  • the intermediate reinforcement layer 14 is a braided mesh layer, and the braided mesh layer is woven with metal wires, such as nickel-titanium alloy wires or stainless steel wires.
  • the braided mesh layer is woven in a one-press-one or one-press-two manner.
  • the braided mesh layer is woven with 8-16 strands of metal wires, and the PPI of the braided mesh layer is 20-120.
  • the braided mesh layer is made of round wires, and the wire diameter of the round wires is 0.001-0.01 inches.
  • the braided mesh layer is made of flat wires, and the width of the flat wires is 0.001-0.01 inches and the thickness is 0.001-0.005 inches.
  • the PPI of the proximal end of the braided mesh layer is greater than the PPI of the distal end, which can help the distal end of the manufactured catheter body 1 to have good flexibility and reachability, and the proximal end has good pushing performance.
  • PPI stands for "Pick Per Inch", which refers to the sum of the number of warp and weft threads per inch. This is an important indicator to measure the density of woven fabrics. The higher the PPI value, the higher the density of the woven fabric.
  • the middle reinforcing layer 14 is a spring layer, which is made of metal wires, which may be nickel-titanium alloy wires and/or stainless steel wires, wherein the wire diameter of the metal wires is 0.01 mm to 0.3 mm, and the pitch is 0.03 mm to 0.3 mm.
  • the proximal end of the spring layer is wound with stainless steel wire, and the distal end is wound with nickel-titanium alloy wire.
  • the pitch of the proximal end of the spring layer is greater than the pitch of the distal end, which can help the distal end of the manufactured catheter body 1 have better flexibility and reachability, and the proximal end has better pushing performance.
  • the distal end of the spring layer uses nickel-titanium alloy wire with a wire diameter of 0.05mm and a pitch of 0.1mm
  • the proximal end uses stainless steel wire with a wire diameter of 0.08mm and a pitch of 0.08mm.
  • the catheter body 1 is divided into a compliant zone, a transition zone and a push zone in the direction from the distal end to the proximal end, and the hardness of the compliant zone, the transition zone and the push zone increases in sequence.
  • the length of the compliant zone is 1-30cm, or the length of the transition zone is 2-50cm, or the length of the push zone is 5-50cm.
  • the schemes in which the length of the compliant zone is 1-30cm, the length of the transition zone is 2-50cm, and the length of the push zone is 5-50cm can also be set in the same scheme.
  • the middle reinforcement layer 14 is a spiral cut tube layer.
  • the spiral cut tube layer can ensure a certain strength while having better flexibility, can better adapt to complex blood vessel paths, and reduce stimulation and damage to blood vessels; it can also provide a more uniform distribution of support force, avoid local stress concentration, and help improve the stability of the catheter in the blood vessel.
  • the design of the spiral cut tube layer makes its outer diameter smaller and the structure more compact, thereby reducing the outer diameter of the entire extended suction catheter 100, reducing the difficulty of insertion and the impact on the blood vessel; and the weight is lighter, which helps to reduce the foreign body sensation in the patient's body.
  • the spirally cut tube layer is sequentially divided into a compliant zone 141 , a transition zone 142 and a push zone 143 along the direction from the distal end to the proximal end of the catheter body 1 , and the compliant zone 141 , the transition zone 142 and the push zone 143 meet at least one of the following characteristics;
  • the slit length L of the spiral cutting tube layer in the compliant zone 141 is greater than the slit length L of the spiral cutting tube layer in the transition zone 142 and greater than the slit length L of the spiral cutting tube layer in the pushing zone 143;
  • the cutting spacing d of the spiral cutting tube layer in the compliant zone 141 is less than the cutting spacing d of the spiral cutting tube layer in the transition zone 142 and less than the cutting spacing d of the spiral cutting tube layer in the pushing zone 143;
  • the slit angle ⁇ of the spirally cut tube layer in the compliant zone 141 is less than the slit angle ⁇ of the spirally cut tube layer in the transition zone 142 and less than the slit angle ⁇ of the spirally cut tube layer in the push zone 143;
  • the pitch p of the spirally cut tube layer in the compliant zone 141 is less than the pitch p of the spirally cut tube layer in the transition zone 142 and less than the pitch p of the spirally cut tube layer in the pushing zone 143 .
  • the spiral cutting tube layer has four parameters: the slit length L, the cutting spacing d, the slit angle ⁇ , and the pitch p of the three partitions of the soft zone 141, the transition zone 142, and the push zone 143.
  • the four parameters can be One or more of them may be designed according to the above-mentioned variation rules, or all of them may be designed according to the above-mentioned variation rules.
  • the slit angle ⁇ is the angle between the slit and the central axis of the catheter.
  • the flexibility of the catheter body 1 can be changed, and it can be divided into a flexible area 141, a transition area 142, and a push area 143. It is well known that the longer the slit length L, the smaller the cutting spacing d, the smaller the slit angle ⁇ , or the smaller the pitch p, the more flexible the tube body is and the stronger the passability is.
  • the compliant area 141 of the spirally cut tube layer has a longer slit length L, a smaller cutting spacing d, a smaller slit angle ⁇ and a smaller pitch p, making the area compliant and better adapted to the complex blood vessel path, thereby improving the ability of the catheter body 1 to pass through the blood vessel.
  • a smooth transition is achieved between the compliant area 141 and the push area 143 through the transition area 142, which not only maintains a certain degree of compliance to adapt to changes, but also gradually increases the convenience of pushing.
  • the push area 143 adopts a shorter slit length L, a larger cutting spacing d, a larger slit angle ⁇ and a larger pitch p, making the area more powerful when pushing, and facilitating accurate pushing of the catheter to the target position.
  • the reasonable setting of the characteristics of different regions allows the catheter body 1 to have both good soft adaptability and effective pushing ability as a whole, meeting the operation requirements at different stages and improving the success rate and safety of the operation.
  • the slit length of the spirally cut tube layer in the compliant zone 141 is 0.6 mm
  • the cutting spacing is 0.1 mm
  • the slit angle is 95°
  • the pitch is 0.09 mm
  • the slit width is 0.02 mm.
  • the slit length of the spirally cut tube layer in the transition zone 142 is 0.4 mm, the cutting spacing is 0.3 mm, the slit angle is 105°, the pitch is 0.12 mm, and the slit width is 0.02 mm.
  • the thread cutting tube layer in the push zone 143 has a slit length of 0.1 mm, a cutting pitch of 0.6 mm, a slit angle of 115°, a pitch of 0.30 mm, and a slit width of 0.02 mm.
  • the catheter body 1 is provided with a metal connector 4 at the proximal end of the intermediate reinforcement layer 14, and the distal end of the push rod 2 is connected to one end of the metal connector 4.
  • the other end of the metal connector 4 is arranged in parallel with the intermediate reinforcement layer 14, or the other end of the metal connector 4 is connected to the intermediate reinforcement layer 14.
  • the other end of the metal connector 4 is arranged in parallel with the intermediate reinforcement layer 14.
  • the other end of the metal connector 4 is connected to the intermediate reinforcement layer 14.
  • the metal connector 4 is a metal ring arranged in parallel along the axial direction of the catheter body 1, and is arranged in the middle reinforcement layer 14 near one end of the push rod 2, and its cross-sectional shape is the same as that of the middle reinforcement layer 14.
  • the cross-sectional shape of the reinforcement layer 14 is the same.
  • the metal connector 4 is parallel to the middle reinforcement layer 14 on the side away from the push rod 2 but is not connected, and the metal connector 4 is connected to the push rod 2 on the side close to the push rod 2. As shown in FIG.
  • the metal connector 4 is superimposed and welded with the end of the push rod 2, and is designed to be hidden in the middle of the catheter body 1, so as not to cause damage to the blood vessel.
  • the metal connector 4 uses a metal ring and is connected by welding, which can ensure the stability of the connection between the catheter body 1 and the push rod 2 and ensure the mechanical transmission during the operation.
  • the metal connector 4 has a spiral structure, which can effectively buffer the stress concentration at the connection between the push rod 2 and the catheter body 1. It can also provide effective bending resistance for the catheter body 1, and keep the lumen intact when the sealing balloon 3 is filled.
  • the spiral structure of the metal connector 4 can provide a certain degree of elasticity and adaptability, so that it can better adapt to different situations during the connection and force transmission process.
  • the metal connector 4 includes a connecting piece 41 and a plurality of connecting strips 42 connected to opposite sides of the connecting piece 41, the connecting piece 41 and each connecting strip 42 are connected to the middle reinforcing layer 14, the push rod 2 is connected to the connecting piece 41, and each connecting strip 42 is wrapped and connected to the inner layer 13.
  • the connecting strip 42 is wrapped and connected to the outer side of the inner layer 13 in a surrounding manner, which can ensure that the metal connector 4 is firmly connected to the catheter body 1.
  • the metal connector 4 and the push rod 2 may be connected by welding, gluing or the like.
  • the metal connector 4 is welded to the distal end of the push rod 2 to form a welding area 43.
  • welding areas 43 are respectively provided at both ends of the connection between the metal connector 4 and the push rod 2 to form a welded connection between the metal connector 4 and the push rod 2.
  • the diameter of the push rod 2 is reduced, so that the overall outer diameter does not increase, which is beneficial to the passability in the blood vessel and reduces damage to the blood vessel.
  • a first developing member 22 is provided at the distal end of the push rod 2.
  • the first developing member 22 is plugged at the distal end of the push rod 2 and is used to develop and display the position of the sealing balloon 3. Under X-rays, it can be accurately positioned in the patient's body to reduce the difficulty of operation.
  • the provision of the first developing member 22 facilitates accurate display of the position of the sealing balloon 3 through development during the operation, which helps to improve the accuracy and safety of the operation.
  • the first developing member 22 can be made of a filament made of a developing material that is not transparent to X-rays.
  • the developing material is one or more of gold wire, tungsten wire, platinum wire, and platinum-iridium alloy wire.
  • the length of the first developing member 22 along the pushing rod 2 is 3-7 mm.
  • the push rod 2 is a metal tube or a plastic tube with a metal reinforcement layer, but not limited thereto.
  • the push rod 2 is a hypotube, which effectively improves the delivery performance and prevents the extended suction catheter 100 of the present application from being bent during the pushing process. Furthermore, the hypotube has a double marking band to assist in determining whether the extended suction catheter 100 of the present application has reached the coronary ostium. However, this is not limited thereto.
  • the distal end of the push rod 2 is fixed in the tube wall of the catheter body 1.
  • the push rod 2 is provided with a through hole 23 near the proximal end of the catheter body 1.
  • the through hole 23 is connected between the filling channel 21 and the inner cavity of the sealing balloon 3.
  • the push rod 2 can be hidden in the middle of the material of the catheter body 1, so that the push rod 2 does not cause damage to the blood vessel.
  • the push rod 2 is provided with a plurality of through holes 23, and the through holes 23 are distributed in the middle of the sealing balloon 3.
  • the proximal end of the push rod 2 is a hollow structure
  • the filling channel 21 is formed in the hollow structure
  • the distal end of the push rod 2 is a solid structure.
  • the push rod 2 includes a push rod spring wire 24, a push rod braided layer 25 and a push rod outer layer 26.
  • the push rod spring wire 24 is sleeved on the outside of a section of the push rod 2 connected to the metal connector 4 and is close to the metal connector 4 to reduce stress concentration after welding, while improving the bending resistance of the end of the push rod 2 to prevent the end of the push rod 2 from bending during pushing.
  • the diameter of the push rod spring wire 24 is 0.05mm, the spacing is 0.07mm, and the material is nickel-titanium alloy or stainless steel.
  • the middle section and the proximal section of the push rod 22 are both provided with a push rod braided layer 25, and the braiding density of the push rod braided layer 25 of the middle section of the push rod 2 is greater than the braiding density of the push rod braided layer 25 of the proximal section of the push rod 2.
  • the push rod outer layer 26 is sleeved on the overall outer layer of the push rod 2, and the push rod spring wire 24 and the push rod braided layer 25 are both located inside the push rod 2.
  • the middle section of the push rod 2 uses a push rod braided layer 25 with a needle number per inch, which provides good lumen retention, torque transmission and certain pushing performance, while the proximal end of the push rod 2 uses a push rod braided layer 25 with a needle number per inch, which provides good pushing ability.
  • the push rod braided layer 25 can be woven with stainless steel wire.
  • the outer layer 26 of the push rod is a polytetrafluoroethylene layer, which provides a lower friction surface.
  • the polytetrafluoroethylene layer can be prepared by using a polytetrafluoroethylene coating.
  • a marking band is provided at the distal end of the sealing balloon 3 for indicating its position.
  • the wire guide tube 7 is disposed on the outer wall of the catheter body 1 , and the wire guide tube 7 is connected in parallel with the catheter body 1 along the catheter direction of the catheter body 1 .
  • the proximal end of the guide wire tube 7 exceeds the sealing balloon 3, and the distal end of the guide wire tube 7 extends to the distal end of the catheter body 1, thereby ensuring that the guide wire 202 is located in the guide wire tube 7 from the position corresponding to the sealing balloon 3 to the position corresponding to the distal end of the catheter body 1, avoiding the guide wire 202 from forming an angle with the outer side of the catheter body 1, thereby ensuring the smoothness of pushing the catheter body 1.
  • the guide wire tube 7 is located near the push rod 2.
  • the proximal end of the guide wire tube 7 is located on the distal side of the sealing balloon 3, and the distal end of the guide wire tube 7 extends to the distal end of the catheter body 1.
  • the sealing balloon 3 is not filled, the extended suction catheter 100 slides in the guide channel 201a, and the guide wire 202 can movably pass through the guide channel 201a and the guide wire cavity 71; when the sealing balloon 3 is filled, the sealing balloon 3 expands and abuts against the inner wall of the guide channel 201a and the guide wire 202, and the delivery channel 11 is connected with the guide channel 201a.
  • the catheter body 1 and the guide wire tube 7 are separately arranged, and the catheter body 1 and the guide wire tube 7 are bonded, welded, or connected together through a connector. It is understandable that as long as the guide wire cavity 71 and the delivery channel 11 are separated, it falls within the scope of this application.
  • the catheter body 1 and the guidewire tube 7 are integrally arranged, so that the guidewire cavity 71 and the delivery channel 11 are separated and arranged.
  • the guidewire cavity 71 is preferably arranged in the catheter body 1, and the cross-sectional shape of the delivery channel 11 can be variously deformed, but is not limited to this.
  • the extended suction catheter 100 also includes a catheter seat 5, the distal end of the catheter seat 5 is connected to the proximal end of the push rod 2, and a through channel is provided in the catheter seat 5, and the through channel is connected to the filling channel 21.
  • the catheter seat 5, the push rod 2 and the sealing balloon 3 are interconnected to form a single-lumen channel.
  • the doctor can connect the injection fluid and other media at the catheter seat 5, fill the sealing balloon 3 through the fluid channel in the push rod 2, so that the sealing balloon 3 is quickly anchored in the inner cavity of the guiding catheter 201 and blocked.
  • the distal end of the catheter seat 5 is connected to the proximal end of the push rod 2.
  • the connection between the two is a welding connection.
  • the catheter seat 5 is flat, which is convenient for finger gripping and turning.
  • the proximal end of the through passage forms a Luer connector on the catheter hub 5.
  • the Luer connector is connected to a component with a one-way seal or a heparin cap to prevent the filled medium from flowing out of the catheter seat 5, thereby preventing backflow.
  • the proximal end of the through channel may also be connected to a component with a one-way seal or a heparin cap, which may also prevent the filled medium from flowing out of the catheter seat 5, thereby preventing backflow.
  • the catheter seat 5 and the one-way sealed component or the heparin cap may be connected in an integrated structure or in a split configuration. Among them, the one-way sealed component may adopt a one-way valve, but is not limited thereto.
  • a needle-type syringe may be used to insert the heparin cap to inject the filled medium, thereby expanding the sealing balloon 3.
  • a syringe with a Luer connector may be used to connect the one-way valve to inject the filled medium, thereby expanding the sealing balloon 3.
  • a stress sleeve is provided between the distal end of the catheter seat 5 and the proximal end of the push rod 2 , and the stress sleeve plays a role of stress buffering.
  • the surface of the catheter body 1 and the surface of the sealing balloon 3 are both provided with a hydrophilic coating, so that the guide extension suction catheter 100 can smoothly reach the rugged distal end of the blood vessel; in one embodiment, the hydrophilic coating is added to the surface of the catheter body 1 and the sealing balloon 3 by leaching, spraying, etc.
  • the surface of the push rod 2 is provided with a hydrophobic coating; in one embodiment, the hydrophobic coating is added to the surface of the push rod 2 by leaching, spraying, etc.
  • the hydrophobic coating can be made of existing PTFE material, but is not limited thereto.
  • a scale or marking band is provided on the surface of the push rod 2 .
  • the operator can directly hold the catheter seat 5 to steadily push the catheter body 1 into the human body, and the push rod 2 provides good support and pushing force for extending the suction catheter 100 to ensure the smooth progress of the operation.
  • the push rod 2 can be made of stainless steel, and the outer surface is polished to improve the safety of the interventional treatment.
  • a fluid or other medium can be connected to the catheter seat 5, and the fluid or other medium can pass through the inner cavity of the catheter seat 5 and the filling channel 21 of the push rod 2, thereby entering the sealing balloon 3, so that the sealing balloon 3 is pressurized and expanded. Furthermore, the number and total area of the through holes 23 and the openings can be set to achieve the set target diameter of the sealing balloon 3.
  • the sealing balloon 3 is vacuum-flattened and attached to the outer layer 15 of the catheter body 1.
  • the distal end of the sealing balloon 3 is tightly welded or bonded to the outer layer 15 of the catheter body 1, thereby forming a
  • the proximal end of the sealing balloon 3 is tightly welded to the outer layer 15 of the catheter and the distal end of the push rod 2.
  • the welding or bonding at both ends of the entire sealing balloon 3 has a smooth transition without obvious bumps and bumps, and it is smoother to enter other channels and instruments with low resistance.
  • the sealing balloon 3 can be a compliant balloon, and the compliant balloon here means that after the sealing balloon 3 is expanded to a predetermined diameter, its diameter and volume can continue to increase with the increase of filling pressure.
  • the sealing balloon 3 can be made of nylon, polyethylene, polyurethane or polyethylene terephthalate.
  • the distal end of the catheter body 1 is provided with a second developing member 17.
  • the second developing member 17 is provided to develop and display the position of the distal end of the catheter body 1, and accurately locate it in the patient's body under X-ray, thereby reducing the difficulty of operation.
  • a third developing member 18 is provided at the proximal end of the catheter body 1.
  • the third developing member 18 is located inside the sealing balloon 3.
  • the third developing member 18 is provided to develop and display the position of the sealing balloon 3, and accurately locate the sealing balloon 3 in the patient's body under X-ray, thereby reducing the difficulty of operation.
  • the provision of the third developing member 18 facilitates accurate display of the position of the sealing balloon 3 by development during the operation, which helps to improve the accuracy and safety of the operation.
  • the role played by the third developing member 18 is the same as that played by the first developing member 22.
  • a fourth developing member 201b is disposed at the distal end of the guiding catheter 201.
  • a fourth developing member 201b is disposed at the distal end of the guiding catheter 201.
  • the difference in developing position between the second developing member 17 and the fourth developing member 201 b is calculated by comparison to obtain the length of the distal end of the catheter body 1 extending out of the guiding catheter 201 .
  • the length of the sealing balloon 3 from the distal end of the catheter body 1 and the length of the catheter body 1 extending into the blood vessel can be obtained.
  • the length of the sealing balloon 3 from the distal end of the catheter body 1 and the length of the catheter body 1 extending into the blood vessel can be obtained.
  • the developing elements used by the second developing member 17, the third developing member 18, and the fourth developing member 201b can display a black shadow to provide position information to the operator.
  • the developing element can be made of a developing material that is opaque to X-rays, and the developing material is one or more of gold, tungsten, platinum, and platinum-iridium alloy.
  • the developing element can be a developing ring, a cylindrical spiral developing coil, or a developing coating.
  • the developing element is preferably a developing ring, which can help the operator quickly capture the position of the catheter body 1 and the sealing balloon 3.
  • the sealing balloon 3 when the sealing balloon 3 is filled with a pressure of 0.1 bar to 5 bar, the sealing balloon 3 abuts against the inner wall of the guiding channel 201a, and by moving the push rod 2, the sealing balloon 3 can slide in the guiding channel 201a and maintain the sealing effect.
  • the catheter system 200 further includes a guide wire 202 .
  • the guide wire 202 can movably pass through the guiding channel 201 a and the delivery channel 11 .
  • a Y-shaped connection valve 203 is provided at the proximal end of the guiding catheter 201.
  • the Y-shaped connection valve 203 has a first interface 203a and a second interface 203b.
  • the first interface 203a and the second interface 203b are respectively connected to the guiding channel 201a.
  • the guide wire 202 and the extended suction catheter 100 are inserted into the first interface 203a, and the proximal end of the push rod 2 is located outside the Y-shaped connection valve 203.
  • the guide wire 202 is inserted into the first interface 203a and then passes through the guide wire cavity 71 through the guiding channel 201a.
  • contrast agent or other fluid medium can be injected through the Y-type connecting valve on the guiding catheter 201.
  • the medium can flow along the guiding channel 201a of the guiding catheter 201 to the delivery channel 11 of the catheter body 1 of the extended suction catheter 100 for super-selective angiography or other targeted treatments.
  • the catheter system 200 further includes a suction device for aspirating the thrombus 300, which is connected to the second interface 203b and communicates with the guide channel 201a.
  • the relevant suction device can be used to aspirate the thrombus 300, calcified plaque, etc. from the blood vessel through the Y-shaped connection valve on the guide catheter 201. Under the action of negative pressure, the thrombus 300 or calcified plaque can flow back to the guide channel 201a of the guide catheter 201 along the delivery channel 11 of the catheter body 1 of the extended aspiration catheter 100, and finally be drawn out of the body.
  • the specific working principle of the catheter system 200 of the present application is as follows:
  • the guiding catheter 201 is transported to a larger blood vessel near the small blood vessel, and the guide wire 202 is transported along the first interface 203a of the Y-shaped connecting valve 203 at the proximal end of the guiding catheter 201 to the location of the thrombus 300 in the small blood vessel.
  • the guide wire tube 7 is transported along the guide wire 202 to extend the suction catheter 100, and the extended suction catheter 100 extends into the guiding catheter 201 from the first interface 203a of the Y-shaped connecting valve 203 at the proximal end of the guiding catheter 201.
  • the distal end of the catheter body 1 of the extended suction catheter 100 extends from the distal end of the guiding catheter 201, and the proximal end of the catheter body 1 is located in the guiding channel 201a, one end of the push rod 2 is located in the guiding channel 201a, and the other end of the push rod 2 extends from the first interface 203a of the Y-shaped connecting valve 203, and the catheter seat 5 is located
  • the Y-shaped connecting valve 203 is outside. Under the guidance of the guide wire 202, the catheter body 1 reaches the desired position. Since the catheter body 1 contains a push rod 2, the push rod 2 can be used to apply force, so that the guiding catheter 201 can easily enter the branch blood vessels and narrow blood vessels.
  • Establish a transmission channel fill the sealing balloon 3 through the inner cavity of the catheter seat 5 and the filling channel 21 in the push rod 2. After the sealing balloon 3 is expanded, it is anchored in the guiding channel 201a. The sealing balloon 3 blocks the gap between the guiding catheter 201 and the catheter body 1, and the guiding channel 201a is connected to the catheter cavity.
  • the first interface 203a of the push rod 2 extending from the Y-shaped connecting valve 203 of the guiding catheter 201 is blocked, and the contrast agent/drug is delivered at the second interface 203b of the Y-shaped connecting valve 203.
  • the contrast agent/drug flows along the guiding channel 201a into the delivery channel 11 of the catheter body 1, and then flows out at the distal end of the catheter body 1.
  • the contrast agent/drug flows to the distal end of the small blood vessels, thereby performing super-selective angiography/targeted drug administration.
  • An external suction device is used to suck out the thrombus 300 and plaque: the first interface 203a of the push rod 2 extending from the Y-shaped connection valve 203 of the guiding catheter 201 is blocked, and the suction device is connected to the second interface 203b of the Y-shaped connection valve 203 to suck out the thrombus 300 and plaque at the distal end of the catheter body 1. Under the action of negative pressure, the thrombus 300 or calcified plaque flows back to the guiding channel 201a along the delivery channel 11 of the catheter body 1 until it is sucked out of the body.
  • Withdrawal of the guide wire 202 (or the extended suction catheter 100): Use a pressure pump to withdraw the medium in the sealing balloon 3 under negative pressure. Under X-ray fluoroscopy, confirm that the sealing balloon 3 is deflated and no medium remains, and withdraw the guide wire 202 (or the extended suction catheter 100) as a whole until it is out of the body.
  • the present application also provides a method for performing thrombus aspiration using the above-mentioned catheter system 200, the method comprising: using a guide catheter 201 that extends into a patient's blood vessel in a percutaneous structure to guide the extended aspiration catheter 100, expanding the sealing balloon 3 to abut against the inner wall of the guide channel 201a and maintain a sealing effect, applying suction through the guide channel 201a and the delivery channel 11 to aspirate the fluid out of the guide catheter 201, and thereby removing the thrombus 300 from the blood vessel.
  • the present application also provides a method for performing a medical procedure in a body blood vessel using the above-mentioned catheter system 200, wherein the proximal portion of the guide channel 201a is connected to the delivery channel 11 to form a suction cavity, and the method includes: extending the suction catheter 100 by sliding relative to the guide catheter 201, tracking the extended suction catheter 100 to a desired position in the blood vessel, and applying suction through the suction cavity to remove the thrombus 300 from the blood vessel.
  • the present application also provides a method for placing the extended suction catheter 100 of the catheter system 200 into a narrow and curved blood vessel of a body, the method comprising: inserting a guide wire 202 into a guide wire tube 7, The long suction catheter 100 is pushed on the guide wire 202 and pushed out through the distal opening of the guiding catheter 201. After the suction catheter 100 is extended to a preset length, the sealing balloon 3 is expanded so that the sealing balloon 3 abuts against the inner wall of the guiding channel 201a. Further, the pushing rod 2 is moved so that the sealing balloon 3 can slide in the guiding channel 201a and maintain the sealing effect.
  • the catheter system 200 of the present application has an extended suction catheter 100, which is provided with a sealing balloon 3 at the proximal end of the catheter body 1, and a filling channel 21 connected to the sealing balloon 3 is provided in the push rod 2.
  • the extended suction catheter 100 is extended along the proximal end of the guiding catheter 201, one end of the push rod 2 extends out of the proximal end of the guiding catheter 201, and the distal end of the catheter body 1 extends from the distal end of the guiding catheter 201.
  • the proximal end of the catheter body 1 is located in the guiding channel 201a of the guiding catheter 201, and the sealing balloon 3 can be filled through the filling channel 21.
  • the outer wall of the sealing balloon 3 abuts against the inner wall of the guiding channel 201a of the guiding catheter 201, so as to prevent the pressure from leaking through the gap between the guiding extended suction catheter 100 and the guiding catheter 201 during the thrombus aspiration process, so that the extended suction catheter 100 is effectively connected to the guiding catheter 201 and forms a sealed suction cavity.
  • the new suction channel formed by connecting the extended suction catheter 100 of the present application with the guide catheter 201 can provide a larger suction channel and a stronger suction force.
  • the extended suction catheter 100 of the present application is not easy to slip or slip out in the guide channel 201a, thereby enhancing the axial stability of the extended suction catheter 100 in the guide catheter 201.
  • the proximal end of the extended suction catheter 100 of the present application can be pushed to move forward and backward.
  • the extended suction catheter 100 of the present application is provided with a guidewire tube 7 on the catheter body 1, so that the guidewire 202 can pass through the guidewire cavity 71 of the guidewire tube 7 without occupying the area of the delivery channel 11 of the catheter body 1, ensuring that the suction passage for suction through the guide channel 201a and the delivery channel 11 is smooth, and the effective suction area is relatively large, which can avoid the influence of the guidewire 202 on the effective suction area of the lumen and improve the suction effect.
  • the guidewire 202 passing through the guidewire cavity 71 can also guide and anchor the catheter body 1, ensuring that the extended suction catheter 100 can be accurately delivered to the target area.
  • the extended suction catheter 100 of the present application can be used as a guiding instrument to be inserted deeper into the blood vessel, and can also realize the function of thrombus and plaque suction, reduce thrombotic events caused by thrombus suction, reduce the exchange between instruments, and improve surgical efficiency.

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Abstract

L'invention concerne un cathéter d'aspiration à extension, un système de cathéter et un procédé. Le cathéter d'aspiration à extension comprend un corps de cathéter, une tige de poussée, un ballonnet scellé et un tube de fil guide. Le corps de cathéter est pourvu intérieurement d'un canal de distribution, et l'extrémité proximale du corps de cathéter est pourvue d'une ouverture d'introduction. L'extrémité distale de la tige de poussée est reliée à l'extrémité proximale du corps de cathéter, et la tige de poussée est pourvue intérieurement d'un canal de remplissage. Le ballonnet scellé est situé à une position proche de l'extrémité proximale du corps de cathéter, une lumière du ballonnet scellé étant mise en communication avec le canal de remplissage. Le tube de fil guide est disposé sur le corps de cathéter, et est pourvu intérieurement d'une cavité de fil guide. Dans le cathéter d'aspiration à extension de la présente invention, étant donné que le tube de fil guide est disposé sur le corps de cathéter, un fil guide peut passer à travers la cavité de fil guide dans le tube de fil guide sans occuper la zone du canal de distribution du corps de cathéter, ce qui permet de garantir qu'un canal d'aspiration servant à l'aspiration par le biais du canal de distribution du corps de cathéter est lisse, rendant la zone d'aspiration efficace relativement grande, et améliorant l'effet d'aspiration. En outre, le fil guide qui passe à travers la cavité de fil guide peut également guider et ancrer le corps de cathéter, garantissant ainsi que le cathéter d'aspiration à extension peut être administré avec précision à une région cible.
PCT/CN2024/117545 2023-09-11 2024-09-06 Cathéter d'aspiration à extension, système de cathéter et procédé Pending WO2025055832A1 (fr)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
CN202322465547.6 2023-09-11
CN202322465547.6U CN221787839U (zh) 2023-09-11 2023-09-11 导引抽吸导管及具有该导管的导管系统
CN202410667874.6 2024-05-27
CN202410667865.7A CN118542982A (zh) 2024-05-27 2024-05-27 延长抽吸导管及具有该导管的导管系统
CN202421176251.0U CN223287214U (zh) 2024-05-27 2024-05-27 远端抽吸导管及血栓抽吸导管系统
CN202421176251.0 2024-05-27
CN202410667865.7 2024-05-27
CN202410667874.6A CN118477216A (zh) 2024-05-27 2024-05-27 导引抽吸导管及具有该导管的导管系统
CN202421477538.7 2024-06-26
CN202421477538.7U CN222930166U (zh) 2024-06-26 2024-06-26 一种延长导管及导管系统
CN202421479506.0U CN223392755U (zh) 2024-06-26 2024-06-26 一种延长导管及其导管系统
CN202421479506.0 2024-06-26

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PCT/CN2024/117544 Pending WO2025055831A1 (fr) 2023-09-11 2024-09-06 Cathéter d'aspiration de type à extension de guide, et système et procédé de cathéter d'aspiration de caillot sanguin
PCT/CN2024/117545 Pending WO2025055832A1 (fr) 2023-09-11 2024-09-06 Cathéter d'aspiration à extension, système de cathéter et procédé

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CN106163429A (zh) * 2014-04-08 2016-11-23 英丘维特有限责任公司 管理血栓形成的系统和方法
CN218961568U (zh) * 2022-10-18 2023-05-05 科睿驰（深圳）医疗科技发展有限公司 导丝球囊和血栓抽吸套件
CN219167463U (zh) * 2022-12-29 2023-06-13 广东博迈医疗科技股份有限公司 延长导管及医疗器械
CN116138841A (zh) * 2023-04-20 2023-05-23 广东博迈医疗科技股份有限公司 延长导管及去除细血管栓塞物质的导管系统
CN117323476A (zh) * 2023-11-14 2024-01-02 广东博迈医疗科技股份有限公司 延长抽吸导管及具有该导管的导管系统
CN118477216A (zh) * 2024-05-27 2024-08-13 广东博迈医疗科技股份有限公司 导引抽吸导管及具有该导管的导管系统
CN118542982A (zh) * 2024-05-27 2024-08-27 广东博迈医疗科技股份有限公司 延长抽吸导管及具有该导管的导管系统

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