Intravascular thrombus removal balloon catheter
Technical Field
The utility model relates to a catheter, in particular to an intravascular thrombus removal balloon catheter.
Background
The existing Fogarty thrombus removal balloon catheter is a balloon catheter with a closed front end, the balloon is made of latex materials, and two ends of the balloon can be developed. After the saccule enters a target blood vessel, the saccule is filled, thrombus in the occlusion blood vessel is crushed, and small blood clots formed after crushing flow to the far-end blood vessel along with blood circulation and are slowly absorbed. Larger emboli or old flocculent thrombus can be dragged out of the body following the balloon. The cutting balloon catheter is a balloon catheter which is specially used for cutting plaque tissues deposited on a blood vessel wall and is provided with a blade on the outer wall of a balloon, and benefits mainly by the mode of pressing plaque and slightly expanding the blood vessel wall.
The existing Fogarty embolectomy balloon catheter is a single-lumen tube, the pushing force is poor, and the extremely thin blood vessel with a complicated bifurcation at the distal end is difficult to reach under the condition of lacking the guiding of a guide wire. Small blood clots crushed by the balloon or small emboli that are not captured may occlude some distal vessels, causing some complications and even sudden death. And because the latex saccule is softer, the saccule is easy to slip or break in calcified pathological blood vessels, and the thrombus removal effect is lost.
The sacculus material of cutting sacculus pipe is nylon, and there is cutting blade on the sacculus surface, and it can expand into rated external diameter under rated pressure, and when sacculus diameter exceeded normal blood vessel internal diameter 1.1 times, the blade on sacculus surface very easily caused cutting nature damage to the blood vessel of non-pathological change position, made the vascular wall impaired. When the diameter of the balloon is smaller than the inner diameter of the blood vessel, the embolus is easy to slide out from the gap between the balloon and the blood vessel, so that the embolus removal fails or the operation time is prolonged.
Accordingly, one skilled in the art provides an endovascular embolectomy balloon catheter to address the problems set forth in the background above.
Disclosure of Invention
An object of the utility model is to provide an endovascular embolectomy sacculus pipe to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an intravascular thrombus taking balloon catheter comprises a balloon catheter body and a thrombus taking sheath, wherein the balloon catheter body consists of a catheter body, a balloon and a Y-shaped catheter seat, a net bag is arranged at the far end of the thrombus taking sheath, and a sheath seat is arranged at the near end of the thrombus taking sheath;
the far end of the tube body is provided with a head, a wire guide cavity and a balloon cavity are arranged in the tube body, the wire guide cavity and the tube body are coaxial, the cross section of the balloon cavity is oval or rectangular, a balloon hole is formed outside the balloon cavity, the wire guide cavity penetrates through the head, and the left end and the right end of the balloon are respectively provided with a far end developing mark and a near end developing mark;
a balloon channel and a wire guide channel are arranged in the Y-shaped catheter seat, the wire guide channel is positioned below the balloon channel, and a silica gel ring I and a cock I are arranged outside the wire guide channel;
a plug sheath channel is arranged in the sheath tube seat, a plug cock II is sleeved on the outer side of the plug sheath channel, a silica gel ring II is arranged at the front end of the plug cock II, and the silica gel ring II is sleeved on the plug sheath channel;
the net bag is fixed at the front end of the bolt taking sheath in a welding or bonding mode, the front end of the net bag is provided with a developing ring, and the middle of the developing ring is provided with a hole;
the outer surfaces of the tube body, the balloon and the embolectomy sheath are coated with hydrophilic lubricating coatings, and the inner surfaces of the guide wire cavity and the embolectomy sheath are coated with silicone oil lubricating coatings;
the net bag is made of nylon threads, polyester threads or nylon threads or nickel-titanium alloy net threads with memory function and hydrophilic coating, and is contracted in the embolectomy sheath when not in use;
the balloon is made of latex, modified polyurethane or high-elasticity polyolefin, and the compliance of the balloon is 6-10.
As a further aspect of the present invention, the material of the head is a polyurethane containing barium sulfate or bismuth subcarbonate, a polyetheramide elastomer containing barium sulfate or bismuth subcarbonate, a low-density polyethylene containing barium sulfate or bismuth subcarbonate, a polyvinyl chloride containing barium sulfate or bismuth subcarbonate, or a nylon containing barium sulfate or bismuth subcarbonate.
As a further embodiment of the present invention, the tube body is made of polyether amide elastomer, polyurethane, low density polyethylene, polyvinyl chloride or nylon.
As a further aspect of the present invention, the tube body is a metal wire woven reinforced multi-layer composite tube or a hypotube, and the inner and outer layers of the composite tube are made of polyether amide elastomer, nylon or polytetrafluoroethylene.
As a further embodiment of the present invention, the material of the far-end development mark and the near-end development mark is a binder containing a developer, a coating material containing a developer, or stainless steel, pure gold, platinum-iridium alloy, or nickel-titanium alloy.
As a further embodiment of the present invention, the materials of the Y-shaped catheter holder and the sheath holder are polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyoxymethylene or polypropylene.
As a further proposal of the utility model, the thrombus taking sheath is made of fluoroplastic, low-density polyethylene, polyvinyl chloride or nylon.
As the utility model discloses scheme further still, the sheath of taking embolus is that the multilayer composite tube or the hypotube of strengthening are woven to the wire, and the inside and outside layer material of composite tube adopts polyether amide elastomer, nylon or polytetrafluoroethylene, and the coating of taking the sheath of embolus is ultra-thin PTFE skin.
As a further proposal of the utility model, the developing ring is made of stainless steel, pure gold, platinum-iridium alloy or nickel-titanium alloy.
As a further proposal of the utility model, the silica gel or rubber is adopted as the material of the silica gel ring one and the silica gel ring two.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a sacculus pipe has increased the rigidity of latex sacculus, can keep certain shape in the blood vessel after being sufficient, avoids taking place the sacculus slippage to compatible guide seal wire makes the sacculus pipe can reach farther pathological change position under the guide of seal wire.
2. The utility model discloses a sacculus pipe is under the condition of not changing, and the diameter of sacculus is variable, makes the sacculus external diameter can adapt to different vascular internal diameters, makes the embolus of catching neither follow the sacculus and vascular clearance slippage nor do not cause extra cutting and high frictional force harm to normal vascular wall.
3. When the balloon catheter is used, the clearance between the balloon and the blood vessel becomes smaller, so that thrombus can be prevented from slipping from the thrombus extractor, the thrombus can be prevented from falling off and spreading to a distance, the thrombus removal rate is obviously improved, the thrombus extraction times are reduced, the time interval from getting sick to recanalizing the blood vessel is shortened, valuable rescue time is won for patients, and the balloon catheter plays a vital role in saving the lives of the patients; the rigidity of sacculus can be strengthened to the string bag, makes the sacculus even do not take place the slippage in calcification constrictive blood vessel department or complicated branch blood vessel department, and string bag surface unevenness is favorable to the embolus deposit on the string bag, is taken out extracorporeally along with the sacculus.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of the tube body of the present invention.
Fig. 3 is an enlarged view of the middle string bag of the utility model.
Fig. 4 is a schematic structural view of a coronary artery of the present invention.
Fig. 5 is a schematic structural view of the middle balloon in coronary artery of the present invention.
Fig. 6 is a schematic structural view of the middle balloon located in the artery of the present invention.
In the figure: 1-a pipe body; 11-a head; 12-the balloon cavity; 13-balloon orifice; 14-a guidewire lumen; 2-a balloon; 21-distal visualization marker; 22-proximal visualization marker; 3-Y type conduit seat; 31-balloon channel; 32-a cock I; 33-silica gel ring one; 34-a guide wire channel; 4, taking the thrombus sheath; 5-a net bag; 51-a developing ring; 6-sheath base; 61-silica gel ring two; 62-a embolic sheath channel; 63-cock two.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 3, in an embodiment of the present invention, an intravascular thrombus extraction balloon catheter includes a balloon catheter body and an thrombus extraction sheath 4, the balloon catheter body is composed of a catheter body 1, a super-compliance low-pressure filling balloon 2, and a Y-shaped catheter seat 3 capable of adjusting a sealing degree, a net bag 5 is disposed at a distal end of the thrombus extraction sheath 4, and a sheath catheter seat 6 capable of adjusting a sealing degree is disposed at a proximal end of the thrombus extraction sheath 4;
the far end of the tube body 1 is provided with a flexible and developable head 11, a guidewire cavity 14 and a balloon cavity 12 are arranged inside the tube body 1, the guidewire cavity 14 is coaxial with the tube body 1, the cross section of the balloon cavity 12 can be in an oval, rectangular or other shape, a balloon hole 13 is formed outside the balloon cavity 12 and used for realizing the communication between the balloon 2 and the balloon cavity 12, the guidewire cavity 14 penetrates through the head 11, and the left end and the right end of the super-compliance low-pressure filling balloon 2 are respectively provided with a far end developing mark 21 and a near end developing mark 22;
a balloon channel 31 and a guide wire channel 34 are arranged in the Y-shaped catheter seat 3 with adjustable sealing degree, the guide wire channel 34 is positioned below the balloon channel 31, a silica gel ring I33 and a cock I32 are arranged outside the guide wire channel 34, the tightness of the silica gel ring I33 can be controlled by rotating the cock I32, the minimum inner diameter of the guide wire channel 34 is adjusted, and the guide wire and the balloon catheter are controlled to be in relative positions or the whole guide wire channel 34 is sealed;
a plug sheath channel 62 is arranged in the sheath tube seat 6, a second cock 63 is sleeved outside the plug sheath channel 62, a second silica gel ring 61 is arranged at the front end of the second cock 63, and the second silica gel ring 61 is sleeved on the plug sheath channel 62;
the net bag 5 is fixed at the front end of the embolectomy sheath 4 in a welding or bonding mode, the front end of the net bag 5 is provided with a developing ring 51, and the middle of the developing ring 51 is provided with a hole for a guide wire to pass through;
the outer surfaces of the tube body 1, the balloon 2 and the embolectomy sheath 4 are coated with hydrophilic lubricating coatings, and the inner surfaces of the guide wire cavity 14 and the embolectomy sheath 4 are coated with silicone oil lubricating coatings.
The material of the head 11 is not limited to polyurethane (PU, TPU) containing barium sulfate or bismuth subcarbonate, polyether amide elastomer (Pebax) containing barium sulfate or bismuth subcarbonate, Low Density Polyethylene (LDPE) containing barium sulfate or bismuth subcarbonate, polyvinyl chloride (PVC) containing barium sulfate or bismuth subcarbonate, nylon (PA) containing barium sulfate or bismuth subcarbonate, or other thermoplastic elastomers.
The material of the pipe body 1 is not limited to polyether amide elastomer (Pebax), polyurethane (PU, TPU), Low Density Polyethylene (LDPE), polyvinyl chloride (PVC), nylon (PA), metal wire braided reinforced multilayer composite pipe or hypotube, and the material of the inner and outer layers of the metal wire braided reinforced composite pipe is not limited to polyether amide elastomer (Pebax), nylon (PA), Polytetrafluoroethylene (PTFE) or other high-rigidity thermoplastic elastomers.
The material of the distal end development marker 21 and the proximal end development marker 22 is not limited to a binder containing a developer, a coating material containing a developer, or stainless steel, pure gold, platinum-iridium alloy, nickel-titanium alloy, and stainless steel processed by gold plating, or other metal and alloy materials.
The material of the saccule 2 is latex, and can also be modified polyurethane (TPU), high-elasticity polyolefin (TPE) or other thermoplastic plastics, and the compliance of the saccule 2 can reach 6-10.
The materials of the Y-shaped catheter hub 3 and the sheath hub 6 are not limited to Polycarbonate (PC), Acrylonitrile Butadiene Styrene (ABS), Polyoxymethylene (POM), polypropylene (PP), and alloy plastics thereof.
The material of the embolectomy sheath 4 is not limited to FEP, PTFE and other fluoroplastics, Low Density Polyethylene (LDPE), polyvinyl chloride (PVC), nylon (PA), metal wire braided reinforced multilayer composite tube or hypotube; the inner and outer layer materials of the composite tube reinforced by the metal wire weaving are not limited to polyether amide elastomer (Pebax), nylon (PA), Polytetrafluoroethylene (PTFE) or other high-rigidity thermoplastic elastomers, and the coating of the embolectomy sheath 4 can be an ultrathin PTFE outer layer.
The material of the net bag 5 is not limited to nylon thread, terylene thread, nylon thread or other high molecular polymer wire, or nickel-titanium alloy net thread with memory function and hydrophilic coating, and the net bag 5 is contracted in the embolectomy sheath 4 when not in use.
The material of the developing ring 51 is not limited to stainless steel, pure gold, platinum-iridium alloy, nickel-titanium alloy, and stainless steel processed by gold plating or other metal and alloy materials.
The first silica gel ring 33 and the second silica gel ring 61 can be made of silica gel or rubber.
Referring to fig. 4-6, taking the thrombus removal of the coronary artery as an example, specifically describing the use of the thrombus removal balloon catheter of the present invention, the inner diameter of the coronary artery and the artery is shown in fig. 4 below, and it can be clearly seen that the coronary artery is thinner than the artery.
When coronary artery vessel thrombus taking is needed, after a guide wire enters a target coronary artery vessel through an artery vessel, a thrombus taking sheath 4 is firstly sent to a blocked part of the coronary artery vessel along the guide wire, under the guidance of an X-ray device, a developing ring 51 at the head of a net bag 5 is ensured to pass through the blocked part of the vessel, then a balloon catheter is also sent into the coronary artery vessel along the guide wire, at the moment, the balloon catheter is positioned in the thrombus taking sheath 4, the net bag 5 contracted in the thrombus taking sheath 4 is jacked open to the vessel, the balloon 2 is filled through a balloon channel 31 in a Y-shaped catheter seat 3, and at the moment, the states of the balloon 2, the thrombus taking sheath 4 and the net bag 5 are shown in figure 5;
a second cock 63 of the sheath tube seat 6 and a first cock 32 of the Y-shaped catheter seat 3 are well controlled, so that air cannot enter the thrombus taking sheath 4 and the guide wire cavity 14 of the balloon catheter, and the thrombus taking sheath 4 and the balloon catheter are dragged to be withdrawn out of the body along the guide wire;
when the proximal development mark 22 of the balloon 2 is observed to be positioned in an arterial vessel under the guidance of an X-ray device, the second cock 63 of the sheath base 6 is slightly loosened, the sheath base 6 is pulled at the same time, the relative distance between the development ring 51 and the head of the embolectomy sheath 4 is reduced, the balloon 2 is deformed at the moment, the outer diameter of the balloon is increased, the outer diameter of the balloon is observed under the guidance of the X-ray device, the balloon 2 is properly filled or released, the gap between the outer diameter of the balloon 2 and the arterial vessel wall is minimized, the embolus is ensured not to slip from the gap, and the outer diameter of the balloon 2 can be observed to be increased when the balloon 2, the embolectomy sheath 4 and the net bag 5 are in the state as shown in FIG;
the relative position of the embolectomy sheath 4 and the net bag 5 and the filling magnitude of the sacculus 2 can be continuously adjusted in the process of withdrawing the sacculus catheter and the embolectomy sheath 4, so that the outer diameter of the sacculus 2 is always matched with the inner diameter of a blood vessel, and the embolus can be prevented from being separated in the process of withdrawing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.