WO2020087963A1 - Cathéter médical et dispositif central de guidage - Google Patents

Cathéter médical et dispositif central de guidage Download PDF

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Publication number
WO2020087963A1
WO2020087963A1 PCT/CN2019/094631 CN2019094631W WO2020087963A1 WO 2020087963 A1 WO2020087963 A1 WO 2020087963A1 CN 2019094631 W CN2019094631 W CN 2019094631W WO 2020087963 A1 WO2020087963 A1 WO 2020087963A1
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WIPO (PCT)
Prior art keywords
catheter
catheter body
core device
guide core
medical
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PCT/CN2019/094631
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English (en)
Chinese (zh)
Inventor
薛迎风
Original Assignee
薛迎风
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Application filed by 薛迎风 filed Critical 薛迎风
Publication of WO2020087963A1 publication Critical patent/WO2020087963A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • 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

Definitions

  • the invention relates to the technical field of medical supplies, in particular to a medical catheter and a guide core device.
  • the existing medical catheter is made with a small angle between the cross section of the catheter body and the cross section of the catheter.
  • puncturing into a blood vessel it can slide smoothly without damaging the wall of the blood vessel, and can also penetrate the blood vessel smoothly.
  • the cross-section of the catheter body cannot play a role of supporting the blood vessel wall, and it is very easy to be "attached" when the blood vessel bends and / or the venous tube wall collapses, and the blood vessel or catheter wall is blocked or not completely blocked.
  • the delivery channel may be blocked due to clogged blood vessels or catheters, preventing treatment. If hemodialysis treatment is in progress, the CRRT operation may be stopped due to a decrease in blood flow, which may hinder the treatment.
  • Single-lumen catheters, double-lumen catheters, and multi-lumen catheters all have the phenomenon of "adherence" to the collapse of blood vessel walls.
  • the existing double-lumen catheter also has the same problem during use.
  • the port of the cross-sectional shape of the catheter body will be stuck on the outside of the blood vessel wall or tear the blood vessel wall when the puncture inlet is punctured, causing massive bleeding.
  • the cross section of the catheter body is made as a slope with a small angle between the cross section of the catheter and the puncture When entering the blood vessel, it can slide smoothly without damaging the blood vessel wall, and can also penetrate the blood vessel smoothly.
  • the cross-section of the catheter body cannot play the role of supporting the blood vessel wall, and it is easy to be "attached” when the blood vessel bends and / or the venous tube wall collapses, and the blood vessel wall is blocked or incompletely blocked, causing blood flow The drop caused the CRRT operation to stop and prevent treatment.
  • Subcutaneous deep vein double-lumen catheter for hemodialysis is an ideal choice for dialysis (or CRRT) patients, and vascular access is an indispensable prerequisite for hemodialysis treatment.
  • the medical catheter of the present invention can not only be used to deliver blood, drugs or nutrients to the human body, the catheter can be provided for patients undergoing subcutaneous deep vein double-lumen catheters for hemodialysis, and can be provided for single-lumen catheters, double It is used by patients with lumen catheters, multi-lumen catheters, and other similar treatment techniques.
  • the invention provides a medical catheter and a guiding core device, which can simultaneously solve the problem that the catheter smoothly enters the blood vessel wall during puncture to avoid causing major bleeding, and can also prevent the catheter from collapsing at the bend of the blood vessel and / or the venous tube wall When the blood vessels "attach" phenomenon.
  • a technical solution adopted by the present invention is: a medical catheter including a first catheter body and a guide core device partially contained in the first catheter body for guiding the first catheter body into a blood vessel .
  • the guide core device includes a tube exterior, a transition connection portion and a tail portion connected in sequence, the tube exterior is exposed outside the first catheter body, and the transition connection portion is used for cooperative connection with the first catheter body.
  • the outer contour of the tube of the guide core device is streamlined.
  • the guiding core tube is provided with a transition guiding slope with a side view of the longitudinal axis profile of the bullet.
  • the width of the tail portion of the guide core device is smaller than the width of the transition portion, and the length of the outside of the tube along the cross-sectional direction of the first conduit body is 9-11 mm.
  • the guide core device further includes a hand-held portion for hand-holding, and the hand-held portion is connected to the tail portion.
  • the hand-held part is ring-shaped, cylindrical, circular or conical.
  • the guide core device and the first catheter body are detachably connected.
  • the guide core device and the first catheter body are detachably connected by medical glue.
  • the angle between the longitudinal section of the first conduit body and the cross section of the first conduit body along the extending direction of the guide core device is 45 degrees to 135 degrees.
  • the angle between the longitudinal section of the first conduit body and the cross section of the first conduit body along the extending direction of the guide core device is less than 90 degrees.
  • At least one of the catheter bodies has a cross-sectional diameter along the direction of extension of the guide core device that is smaller than a cross-sectional diameter of the catheter body along the direction opposite to the direction of extension of the guide core device.
  • the first duct body and / or the second duct body are provided with side holes, and the side holes serve as secondary inlets or secondary outlets. It is further preferred that the side hole diameter is 1.5 mm.
  • the medical catheter structure of the invention can greatly reduce the "sticking" rate of the catheter.
  • the cavity inlet provided by the guide core device is the main inlet
  • the side hole of the first catheter body is provided, and the side hole serves as the secondary inlet.
  • the curved surface of the blood vessel bends are all obtuse angles, and cannot be embedded in the space formed by the 85-degree angle of the entrance of the first catheter body
  • the top edge of the cross section of the main entrance of the first catheter body forms a sufficiently high level of support to ensure smooth blood flow at the entrance.
  • the medical catheter further includes a second catheter body, the cavity of the first catheter body and the second catheter body are independent of each other, the first catheter body and / or the second catheter body are provided with a guide core device, the first catheter body and / Or the second catheter body is provided with at least one side hole, the medical catheter further includes a three-way socket, a distal end portion of the first catheter body communicating with the first catheter body, and a distal end of the second catheter body communicating with the second catheter body
  • the three-way socket is connected to one end of the first catheter body and the second catheter body, the distal end of the first catheter body, the distal end of the second catheter body, and the distal end of the first catheter body
  • the distal end of the second catheter body is provided with a first stopper card and a second stopper card respectively, and the tee tube seat is also provided with a fixing device for fixing the medical catheter.
  • the cavity section of the first catheter body and / or the second catheter body is oval, semi-circular, sickle-shaped or square. Further preferably, the cavity section of the first catheter body and / or the second catheter body The pair is called an approximate elliptical symmetric bipartite.
  • the present invention discloses a guide core device.
  • the guide core device is used in a single-lumen, double-lumen or multi-lumen medical catheter.
  • the medical catheter includes a first catheter body, and the guide core device is partially housed
  • the first catheter body is used to guide the first catheter body into the blood vessel.
  • the guide core device includes a tube exterior, a transition connection portion and a tail portion connected in sequence, the tube exterior is exposed outside the first catheter body, and the transition connection portion is used for cooperating connection with the first catheter body.
  • the outer contour of the tube is streamlined.
  • the width of the tail portion is smaller than the width of the transition connection portion, and the length of the outside of the tube along the cross-sectional direction of the first conduit body is 9-11 mm.
  • the guide core device further includes a hand-held portion for hand-holding, and the hand-held portion is connected to the tail portion.
  • the guide core device and the first catheter body are detachably connected.
  • the embodiments of the present invention provide a medical catheter and a guide core device that can solve the problem that the medical catheter in the prior art is not smooth during puncture or stuck on the outside of the blood vessel wall or teared without tearing the shell
  • the problem of massive hemorrhage caused by the wall of the blood vessel is more important to avoid the phenomenon that the blood vessel "sticks to the wall” when the blood vessel bends and / or the venous tube wall collapses.
  • the medical catheter and the guide core device provided by the embodiments of the present invention can puncture blood vessels smoothly, provide support for the blood vessel walls, and have a compact structure, and are easy to assemble and use.
  • FIG. 1 is a schematic structural view of an embodiment of a medical catheter of the present invention
  • FIG. 2 is a schematic structural view of a guide core device of an embodiment of a medical catheter shown in FIG. 1;
  • FIG. 3 is a schematic structural diagram of a first catheter body of the embodiment of the medical catheter shown in FIG. 1;
  • FIG. 4 is a schematic structural view of another embodiment of a medical catheter of the present invention.
  • FIG. 5 is a partially enlarged schematic view of a medical catheter shown in FIG. 4;
  • FIG. 6 is a schematic structural view of a medical catheter shown in FIG. 4 from a front view perspective;
  • FIG. 7 is a schematic structural view of a medical catheter shown in FIG. 4 from a top view angle
  • FIG. 8 is a schematic structural diagram of a guide core device of an embodiment of a medical catheter shown in FIG. 4;
  • FIG. 9 is a schematic structural view of a first catheter body and a second catheter body of the medical catheter embodiment shown in FIG. 4;
  • FIG. 10 is a schematic structural view of a front view of a first catheter body and a second catheter body of the medical catheter embodiment shown in FIG. 4;
  • FIG. 11 is a schematic structural view of a first view of a first catheter body and a second catheter body of the medical catheter embodiment shown in FIG. 4;
  • FIG. 12 is a schematic diagram of a left-view perspective structure of a first catheter body and a second catheter body of the medical catheter embodiment shown in FIG. 4;
  • FIG. 13 is a schematic structural view of an embodiment of a medical catheter in use according to the present invention.
  • FIG. 1 is a schematic structural view of an embodiment of a medical catheter of the present invention
  • FIG. 2 is a schematic structural view of a guiding core device of an embodiment of a medical catheter shown in FIG.
  • It is a schematic structural diagram of a first catheter body of an embodiment of a medical catheter shown in FIG. 1.
  • the embodiment of the invention protects a medical catheter, especially a single-lumen catheter.
  • the medical catheter can be used to deliver blood, drugs, or nutrients to the human body.
  • the catheter can be used by patients undergoing hemodialysis, as well as patients using other similar treatment technologies.
  • the material of the medical catheter can be polyurethane, medical rubber, preferably, it can also be all medical polymers and biological materials with anti-coagulation function.
  • the surface of the material can be sprayed with anti-coagulation film layer or medical nano-surface coating. After surface treatment, graft anticoagulant drugs.
  • the medical catheter of the embodiment of the present invention includes a first catheter body 2 and a guide core device 1 partially contained in the first catheter body 2 for guiding the first catheter body 2 into a blood vessel.
  • the first catheter body 2 is a hollow catheter used as a transmission channel for fluids such as drugs, blood, and nutrients.
  • the side that penetrates into the human body is the proximal end, and the opening at the proximal end is the main entrance or the main exit.
  • the first conduit body 2 is provided with a side hole 22, and the side hole 22 serves as a secondary inlet or a secondary outlet.
  • the cavity entrance provided by the guide core device 1 is the main entrance
  • the first catheter body 2 is provided with a side hole 22 on its side. second entrance.
  • the diameter of the side hole 22 is 1.5 mm.
  • the edge of the main inlet / outlet wall of the first conduit body 2 is provided with chamfers to avoid scratches.
  • the center point of the second inlet / outlet of the first conduit body is 3 mm away from the corresponding main inlet / outlet cross-section.
  • the side holes 22 may be provided in plural or symmetrically.
  • the provision of the side hole 22 increases the inlet and outlet of the first conduit body 2, which is beneficial to alleviate the inlet and outlet pressure of the fluid body, to a certain extent, alleviate the phenomenon of “adhering to the wall”, and alleviate the effect of the inlet and outlet clogging caused by the phenomenon of “attaching the wall”.
  • the medical catheter is placed horizontally, and the first catheter body 2 is in a horizontally upright state.
  • the longitudinal section of the first catheter body 2 is a section formed along the opening of the proximal end of the first catheter body 2.
  • the center point of the cross section is located on the center line of the first duct body 2, and the cross section of the first duct body 2 is the horizontal cross section of the first duct body 2.
  • the angle between the longitudinal section of the first conduit body 2 and the cross section of the first conduit body 2 along the extending direction of the guide core device 1 is 45 degrees to 135 degrees.
  • the angle between the longitudinal section of the first conduit body 2 and the cross section of the first conduit body 2 along the extending direction of the guide core device 1 is less than 90 degrees.
  • single-lumen catheters For the delivery of blood, drugs or nutrients to the human body, single-lumen catheters, double-lumen catheters, and multi-lumen catheters can be used, but no matter which catheter is used, a smooth vascular access is essential.
  • a subcutaneous deep vein double-lumen catheter for hemodialysis is an ideal choice for dialysis patients, and smooth blood vessel access is an indispensable prerequisite for hemodialysis treatment.
  • the medical catheter structure of the present invention can greatly reduce the "attachment" rate of the catheter and increase the probability of vascular access patency.
  • the main reason is that the longitudinal section of the first catheter body 2 and the cross section of the first catheter body 2 are along the guide core device 1
  • the angle setting in the extension direction provides the support of the blood vessel.
  • the angle between the longitudinal section of the first catheter body 2 and the cross section of the first catheter body 2 along the extending direction of the guide core device 1 is set to 85 degrees.
  • the longitudinal section of the first catheter body 2 that is, the plane where the main entrance cross-section of the first catheter body 2 lies, forms 85 degrees with the first catheter body 2 along the extending direction of the guide core device 1, and the collapse of the blood vessel wall cannot form an acute angle Folds, curved surfaces of blood vessel bends are all obtuse angles, can not be embedded in the space formed by the 85-degree angle of the entrance of the first catheter body 2, on the other hand, the top edge of the main entrance cross-section of the first catheter body 2 forms Sufficient support to ensure smooth blood flow at the entrance.
  • the cross section of the cavity of the first catheter body 2 is circular, oval, semicircular, sickle-shaped or square.
  • the end of the first catheter body 2 away from the human body may be provided with a flow stopper, a fixing device, etc., which will not be repeated here.
  • the guide core device 1 of this embodiment includes a tube exterior 11, a transition connection portion 12 and a tail portion 13 connected in sequence, the tube exterior 11 is exposed outside the first catheter body 2, and the transition connection portion 12 is used to cooperate with the first catheter body 2 connection.
  • the transitional connection portion 12 is a portion where the guide core device 1 and the first catheter body 2 are relatively fixed and cooperatively connected, and the tail portion 13 is the end of the guide core device 1.
  • the outer contour of the outer portion 11 of the tube is streamlined so that it can be inserted into the blood vessel more smoothly.
  • a streamlined shape is an external shape of the outer portion 11 of the tube, usually presenting a smooth and regular surface without large undulations and sharp edges.
  • the streamlined surface ensures that the outer portion 11 of the tube is subjected to less resistance.
  • the shape of the "bullet” the outer core 11 of the guiding core tube has a transition guiding slope of the side view of the longitudinal axis of the bullet.
  • the entrance cross section of the blood collection hole is covered by the "bullet” and smoothly enters the blood vessel. Damage to the blood vessel wall.
  • the outer contour of the outer portion 11 of the tube may also be an external shape other than a streamline shape, such as a wedge shape, a trapezoid, a triangle, or a circle, which can also cover the smooth insertion of the main outlet 21 of the first catheter body 2 into the blood vessel.
  • the guide core device 1 and the first catheter body 2 are detachably connected.
  • the tail portion 13 of the guide core device 1 can be pulled to remove the guide core device 1 so that the main entrance 21 of the first catheter body 2 is unobstructed.
  • the guide core device 1 is taken out by gently pulling it, which has a compact structure, simple operation, and convenient use.
  • connection method of the guide core device 1 and the first catheter body 2 may also be a connection method without disassembly.
  • the guide core device 1 may be provided with a hollow structure, and the guide core is left in the blood vessel without affecting the patency of the catheter body.
  • the medical catheter includes a first catheter body 2 and a guide core device 1 partially contained in the first catheter body 2 for guiding the first catheter body 2 to be inserted into a blood vessel.
  • the guide core device 1 is provided in a hollow structure and guides
  • the core pulling device 1 is composed of a tube exterior 11 and a transitional connection 12. At this time, the front end opening of the guide core is the entrance and exit of the medical catheter.
  • the guide core device 1 and the first catheter body 2 may be fitted with zero clearance. At this time, the guiding core device 1 is relatively in close contact with the catheter body. During the process of placing the blood vessel, the guiding core device 1 and the catheter body are relatively fixed in position, which is advantageous for placement. When the guide core device 1 is removed, the zero clearance of the guide core device 1 and the catheter body can be removed smoothly.
  • the guide core device 1 and the catheter body are connected by medical glue.
  • Medical adhesives are suitable for bonding skin, organs, nerves, muscles, blood vessels, and mucous membranes. They are also called soft tissue medical adhesives. They are mostly medical e-cyanoacrylate 6B series adhesives and fibrin bio-based adhesives.
  • the medical glue can be a biodegradable biomedical material.
  • the width of the tail portion 13 is smaller than the width of the transitional connection portion 12 to reduce the friction force when the guide core device 1 is taken out.
  • the length of the tube exterior 11 along the cross-sectional direction of the first catheter body 2 is 9-11 mm.
  • the guide core device 1 further includes a hand-held portion 14 for hand-holding, and the hand-held portion 14 is connected to the tail portion 13.
  • the hand-held portion 14 is ring-shaped, cylindrical 141, circular 142 or conical.
  • the hand-held portion 14 facilitates the operator to easily drag the tail portion 13 of the guide core device 1 and pull out the guide core device 1.
  • the present invention provides a medical catheter and guide core device 1 that can allow a medical catheter to smoothly penetrate a blood vessel, reduce the risk of the medical catheter being stuck on the outside of the blood vessel wall or tearing the blood vessel wall to cause major bleeding, and can also be used at the bend of the blood vessel And / or the venous wall and other places that are prone to "sticking to the wall” play a supporting role, reducing the risk of blood vessel blockage caused by the collapse of the blood vessel wall.
  • Medical catheters can not only be used to deliver blood, drugs or nutrients to the human body, the catheter can be used for patients undergoing subcutaneous deep vein double-lumen catheters for hemodialysis, single-lumen catheters, double-lumen catheters, multi-lumen Patient use of catheters, as well as patient use in other similar treatment techniques.
  • the medical catheter and the guide core device 1 provided by the embodiments of the present invention can puncture blood vessels smoothly, provide support for the blood vessel walls, and have a compact structure, and are easy to assemble and use.
  • FIG. 4 is a schematic structural view of another embodiment of the medical catheter of the present invention
  • FIG. 5 is a partially enlarged schematic structural view of the medical catheter shown in FIG. 4
  • FIG. 7 is a schematic structural view of a medical catheter from a front view perspective
  • FIG. 7 is a schematic structural view of a medical catheter from a top view perspective shown in FIG. 4
  • FIG. 8 is a guide of an embodiment of a medical catheter shown in FIG.
  • FIG. 9 is a schematic diagram of the structure of the first catheter body and the second catheter body of a medical catheter embodiment shown in FIG. 4
  • FIG. 11 is a schematic view of a top view perspective structure of a first catheter body and a second catheter body of an embodiment of a medical catheter shown in FIG. 4;
  • FIG. 12 is a view of FIG. 4 A schematic view of a left-view perspective structure of a first catheter body and a second catheter body of a medical catheter embodiment shown;
  • FIG. 13 is a schematic structural diagram of an embodiment of a medical catheter in use according to the present invention.
  • the medical catheter of the embodiment of the present invention takes a double-lumen catheter as an example.
  • the medical catheter can be used to deliver blood, drugs or nutrients to the human body.
  • the catheter can be used by patients undergoing hemodialysis and other similar treatment technology usage scenarios. Used by patients.
  • the medical catheter of the embodiment of the present invention includes a first catheter body 42 and a guide core device 41 partially contained in the first catheter body 42 for guiding the first catheter body 42 into a blood vessel.
  • the lengths of the first catheter body 42 and the second catheter body 43 in this embodiment are different.
  • the medical catheter further includes a second catheter body 43, the cavity of the first catheter body 42 and the second catheter body 43 are independent of each other, and the first catheter body 42 is provided with a guide core device 41.
  • Both the first catheter body 42 and the second catheter body 43 can be provided with a guide core device 41, and the first and second are merely abbreviations.
  • the first catheter body 42 and the second catheter body 43 are hollow catheters, and serve as transmission channels for fluids such as drugs, blood, and nutrients.
  • the side where the first catheter body 42 and the second catheter body 43 penetrate into the human body is the proximal end, and the openings at the proximal ends of the first catheter body 42 and the second catheter body 43 are the main inlet or the main outlet.
  • the first duct body 42 and / or the second duct body 43 are provided with side holes.
  • the side hole serves as a secondary inlet or secondary outlet.
  • the side hole diameter is 1.5 mm.
  • the edge of the main inlet / outlet pipe wall of the first conduit body 42 is provided with chamfers to avoid scratches.
  • the center point of the first inlet / outlet of the first conduit body 42 is 3 mm away from the corresponding main inlet / outlet cross-section.
  • the diameter of the main entrance and exit of the second conduit body 43 is 2.5 mm, and the diameter of the main entrance and exit of the first conduit body 42 is 3.0 mm.
  • the side holes may be provided in plural or symmetrically. The provision of the side hole increases the entrance and exit of the first conduit body 42, which is beneficial to alleviate the pressure of the entrance and exit of the fluid body, to a certain extent, alleviate the phenomenon of “attachment” and the impact of the entrance and exit blockage caused by the “attachment” phenomenon.
  • the embodiment of the present invention is that the double-lumen catheter can be used as a subcutaneous deep vein double-lumen catheter for hemodialysis treatment.
  • the present invention takes a deep-venous double-lumen catheter for blood purification as an example.
  • the first catheter body 42 is a blood collection tube
  • the main entrance of the first catheter body 42 is the main entrance of the blood collection tube
  • the side hole of the first catheter body 42 is the secondary entrance of the blood collection tube
  • the second catheter body 43 is a blood transfusion tube
  • the main outlet of the second catheter body 43 is a main transfusion tube outlet
  • the side hole of the second catheter body 43 is a secondary transfusion tube outlet.
  • One of the design schemes is that the side-hole transfusion hole of the second catheter body 43 is not less than 38 mm from the main entrance of the first catheter body 42.
  • the side-hole transfusion hole of the second catheter body 43 is not less than 60 mm from the main entrance of the first catheter body 42.
  • each side wall of the main inlet of the first blood collection chamber of the first catheter body 42 has a side hole as an auxiliary inlet for blood collection, a diameter of 1.5 mm, and the center point is linearly spaced from the cross section of the main blood collection inlet by 3 mm.
  • the diameter of the bleeding hole of the second catheter body 43 is 2.5 mm, and the diameter of the main entrance of the blood collection hole of the first catheter body 42 is 3.0 mm.
  • the cavity section of the first catheter body 42 and / or the second catheter body 43 is circular, elliptical, semicircular, sickle-shaped or square, and further preferably, the first catheter body 42 and / or the second The pair of cavity sections of the catheter body 43 is called an approximately elliptical symmetric bipartite.
  • the lower surface of the outer tube 411 of the guiding core device 41 of the blood collection cavity of the first catheter body 42 and the upper surface of the tube wall of the second catheter body 43 are adhered with a medical absorbable adhesive and can be exerted by the surgeon Pull and drag to separate.
  • the medical catheter is placed horizontally, and the first catheter body 42 is placed horizontally.
  • the longitudinal section of the first catheter body 42 is the section formed by the opening at the proximal end of the first catheter body 42.
  • the center point is located on the center line of the first duct body 42, and the cross section of the first duct body 42 is the horizontal cross section of the first duct body 42.
  • the angle 44 between the longitudinal section of the first conduit body 42 and the cross section of the first conduit body 42 along the extending direction of the guide core device 41 is 45 degrees to 135 degrees.
  • the angle 44 between the longitudinal section of the first duct body 42 and the cross section of the first duct body 42 along the extending direction of the guide core device 41 is less than 90 degrees.
  • single-lumen catheters For the delivery of blood, drugs or nutrients to the human body, single-lumen catheters, double-lumen catheters, and multi-lumen catheters can be used, but no matter which catheter is used, a smooth vascular access is essential.
  • a smooth vascular access is essential.
  • subcutaneous deep vein double-lumen catheter for hemodialysis is an ideal choice for dialysis patients, and smooth vascular access is an indispensable prerequisite for hemodialysis treatment.
  • the medical catheter structure of the present invention can greatly reduce the "attachment" rate of the catheter and increase the probability of vascular access patency.
  • the main reason is that the longitudinal section of the first catheter body 42 and the cross section of the first catheter body 42 are along the guide core device
  • the angle 44 of the extension direction 41 is set to provide the support function of the blood vessel.
  • the angle 44 between the longitudinal section of the first duct body 42 and the cross section of the first duct body 42 along the extending direction of the guide core device 41 is set to 85 degrees.
  • the longitudinal section of the first catheter body 42 that is, the plane where the main entrance cross-section of the first catheter body 42 lies, forms 85 degrees with the first catheter body 42 along the extending direction of the guide core device 41, and the collapse of the blood vessel wall cannot form an acute angle Folds, curved surfaces of blood vessel bends are obtuse angles, can not be embedded in the space formed by the angle 44 of 85 degrees where the entrance of the first catheter body 42 is formed, on the other hand, the top edge of the cross section of the main entrance of the first catheter body 42 is formed A sufficient height of support is provided to ensure smooth blood flow at the entrance.
  • the guide core device 41 of this embodiment includes a tube outer portion 411, a transition connection portion 412 and a tail portion 413 connected in sequence, the tube outer portion 411 is exposed outside the first catheter body 42, and the transition connection portion 412 is used to cooperate with the first catheter body 42 connection.
  • the transitional connection portion 412 is a portion where the guide core device 41 and the first catheter body 42 are relatively fixed and cooperatively connected, and the tail portion 413 is the end of the guide core device 41.
  • the outer contour of the outer portion 411 of the tube is streamlined so that it can be inserted into the blood vessel more smoothly.
  • the streamlined shape is an external shape of the outer portion 411 of the tube, which usually appears as a smooth and regular surface without large undulations and sharp edges.
  • the streamlined surface ensures that the outside of the tube 411 is subjected to less resistance.
  • the shape of the "bullet” the outer core 411 of the guiding core tube has a transition guiding slope of the side view of the longitudinal axis of the bullet.
  • the entrance cross section of the blood collection hole is covered by the "bullet” and smoothly enters the blood vessel. Damage to the blood vessel wall.
  • the outer contour of the outer portion 411 of the tube may also be an external shape other than a streamline shape, such as a wedge shape, a trapezoid shape, a triangular shape, and a circular shape, which can also cover the smooth insertion of the first catheter body 42 into the blood vessel.
  • the guide core device 41 and the first catheter body 42 are detachably connected.
  • the tail 413 of the guide core device 41 can be pulled to remove the guide core device 41 so that the first catheter body 42 has a smooth entrance and exit.
  • the guide core device 41 is taken out with a slight pull, which has a compact structure, simple operation, and convenient use.
  • connection method between the guide core device 41 and the first catheter body 42 may also be a connection method without disassembly.
  • the guide core device 41 may be provided with a hollow structure, and the guide core is left in the blood vessel without affecting the patency of the catheter body.
  • the medical catheter includes a first catheter body 42 and a guiding core device 41 partially contained in the first catheter body 42 for guiding the first catheter body 42 into the blood vessel.
  • the guiding core device 41 is provided in a hollow structure, guiding
  • the core pulling device 41 is composed of a tube exterior 411 and a transitional connection portion 412. At this time, the front end opening of the guide core is the entrance and exit of the medical catheter.
  • the guide core device 41 and the first catheter body 42 may have a zero clearance fit. At this time, the guiding core device 41 is relatively in close contact with the catheter body. During the process of placing the blood vessel, the guiding core device 41 and the catheter body are relatively fixed in position, which is advantageous for placement. When the guide core device 41 is removed, the zero clearance of the guide core device 41 and the catheter body can be removed smoothly.
  • the guide core device 41 and the catheter body are connected by medical glue.
  • Medical adhesives are suitable for bonding skin, organs, nerves, muscles, blood vessels, and mucous membranes. They are also called soft tissue medical adhesives. They are mostly medical e-cyanoacrylate 6B series adhesives and fibrin bio-based adhesives.
  • the medical glue can be a biodegradable biomedical material.
  • the width of the tail portion 413 is smaller than the width of the transition portion 412 to reduce the friction force when the guide core device 41 is taken out.
  • the length of the tube outer portion 411 in the cross-sectional direction of the first catheter body 42 is 9-11 mm.
  • the guide core device 41 further includes a hand-held portion 414 for hand-holding, and the hand-held portion 414 is connected to the tail portion 413.
  • the hand-held portion 414 is annular, cylindrical 4141, circular 4142 or tapered.
  • the hand-held portion 414 facilitates the operator to drag the tail portion 413 of the guide core device 41 conveniently and pull out the guide core device 41.
  • the medical catheter further includes a three-way socket 45, a distal portion 46 of the first catheter body 42 communicating with the first catheter body 42, and a distal portion 47 of the second catheter body 43 communicating with the second catheter body 43.
  • the through-tube seat 45 is respectively connected to one end of the first catheter body 42 and the second catheter body 43 far away from the tube exterior 411, the distal end portion 46 of the first catheter body 42 and the distal end portion 47 of the second catheter body 43, the first The distal end portion 46 of the catheter body 42 and the distal end portion 47 of the second catheter body 43 are provided with a first stopper 48 and a second stopper 49 respectively, and the three-way socket 45 is also provided with a fixing device for fixing a medical catheter.
  • the present invention also provides a guide core device.
  • a guide core device For the specific structure of the guide core device, refer to the description of Embodiment 1 and Embodiment 2, and details are not described herein again.
  • the present invention provides a medical catheter and guide core device 41 that can allow a medical catheter to smoothly penetrate a blood vessel without tearing the shell, reducing the medical catheter from being stuck on the outside of the blood vessel wall or tearing the blood vessel wall
  • the risk of causing major bleeding can also play a supporting role in places where blood vessels bend and / or venous tube walls are prone to "adherence", reducing the risk of blood vessel blockage caused by the collapse of the blood vessel wall.
  • Medical catheters can not only be used to deliver blood, drugs or nutrients to the human body, the catheter can be used for patients undergoing subcutaneous deep vein double-lumen catheters for hemodialysis, single-lumen catheters, double-lumen catheters, multi-lumen Patient use of catheters, as well as patient use in other similar treatment techniques.
  • the medical catheter and guide core device 41 provided in the embodiments of the present invention can smoothly puncture blood vessels, provide support to the blood vessel walls, and have a compact structure, and are easy to assemble and use.

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  • Health & Medical Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Surgery (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
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  • External Artificial Organs (AREA)
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Abstract

L'invention concerne un cathéter médical et un dispositif central de guidage (1) pour celui-ci. Le cathéter médical comprend un premier corps (2) de cathéter et le dispositif central de guidage (1) partiellement contenu dans le premier corps (2) de cathéter pour guider le premier corps (2) de cathéter devant être introduit dans un vaisseau sanguin. Selon le cathéter médical et le dispositif central de guidage (1), le cathéter médical peut pénétrer sans à-coups dans un vaisseau sanguin, ce qui réduit le risque de saignement majeur provoqué par le fait que le cathéter médical se coince sur la paroi externe du vaisseau sanguin ou déchire la paroi du vaisseau sanguin, et peut supporter des sections d'un vaisseau sanguin sujettes à « adhérence », telles que la courbure du vaisseau sanguin et/ou la paroi d'une veine, réduisant ainsi le risque de blocage de vaisseau sanguin provoqué par l'affaissement du vaisseau sanguin.
PCT/CN2019/094631 2018-07-18 2019-07-03 Cathéter médical et dispositif central de guidage WO2020087963A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201821150336 2018-07-18
CN201821766957.7U CN209378262U (zh) 2018-07-18 2018-10-29 一种医用导管及导引芯装置
CN201821766957.7 2018-10-29

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WO2020087963A1 true WO2020087963A1 (fr) 2020-05-07

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CN112569018A (zh) * 2020-12-31 2021-03-30 刘劼 一种小鼠大脑中动脉线栓装置

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US5415630A (en) * 1991-07-17 1995-05-16 Gory; Pierre Method for removably implanting a blood filter in a vein of the human body
US20070293875A1 (en) * 2006-03-10 2007-12-20 Wilson-Cook Medical, Inc. Clip device and protective cap, and methods of using the protective cap and clip device with an endoscope for grasping tissue endoscopically
CN201194987Y (zh) * 2008-05-22 2009-02-18 谢克基 多通道导管鞘
CN103272324A (zh) * 2013-05-31 2013-09-04 相良顺 一种微创介入式给药装置
CN205831886U (zh) * 2016-06-02 2016-12-28 陈丽娇 一种鞘内置管套装
CN206252721U (zh) * 2016-08-18 2017-06-16 谢宗贵 一种一步法中心静脉导管
CN207707982U (zh) * 2017-06-13 2018-08-10 浙江伏尔特医疗器械股份有限公司 一种动脉穿刺置管引导装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5415630A (en) * 1991-07-17 1995-05-16 Gory; Pierre Method for removably implanting a blood filter in a vein of the human body
US20070293875A1 (en) * 2006-03-10 2007-12-20 Wilson-Cook Medical, Inc. Clip device and protective cap, and methods of using the protective cap and clip device with an endoscope for grasping tissue endoscopically
CN201194987Y (zh) * 2008-05-22 2009-02-18 谢克基 多通道导管鞘
CN103272324A (zh) * 2013-05-31 2013-09-04 相良顺 一种微创介入式给药装置
CN205831886U (zh) * 2016-06-02 2016-12-28 陈丽娇 一种鞘内置管套装
CN206252721U (zh) * 2016-08-18 2017-06-16 谢宗贵 一种一步法中心静脉导管
CN207707982U (zh) * 2017-06-13 2018-08-10 浙江伏尔特医疗器械股份有限公司 一种动脉穿刺置管引导装置

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