A blade cutting balloon suitable for coronary stenosis

Abstract

The application discloses a blade cutting balloon suitable for coronary artery stenosis and relates to the technical field of cutting balloons. The balloon body is internally provided with a plurality of groups of cutting blades which are slidably connected to the inner wall of the balloon body and extend to the outside of the balloon body, and the balloon body is internally provided with a fixed pipe which is fixedly connected to the inner wall of the balloon body and is internally provided with a movable block.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting balloon, in particular to a blade cutting balloon suitable for coronary artery stenosis. BACKGROUND

[0002] In the vascular intervention treatment, especially in the treatment of coronary artery stenosis or restenosis, balloon dilatation is a common and basic treatment method, the traditional balloon dilates the stenosis blood vessel by applying pressure to the lesion site, thereby improving blood flow, however, in the treatment of severe calcified or fibrotic plaque, ordinary balloon often has difficulty in obtaining ideal dilatation effect, and even may cause complications such as elastic recoil and intimal tear, in order to solve the above problems, the blade cutting balloon is developed in clinic, which is attached with metal blades on the surface of the balloon, and the lesion tissue is reduced by directional cutting during expansion, the damage to the normal blood vessel is reduced, and the incidence of postoperative restenosis is reduced to a certain extent, the device shows certain advantages in the treatment of in-stent restenosis, highly fibrotic plaque and specific pre-stent lesions.

[0003] In the prior art, when performing coronary artery surgery, a cutting balloon needs to be used, the existing cutting balloon needs to be accurately delivered and positioned to the coronary artery lesion site before use, and then the balloon is pressurized by the pressurizing assembly, the balloon expands after being pressurized, the preset cutting assembly on the surface of the balloon extends and exposes, and the calcified tissue and plaque structure in the coronary artery vessel wall are cut, for severe calcification and diffuse fibrotic plaque, a single cutting may not be able to completely cut the hard structure, and multiple cuttings are needed to gradually break down the plaque resistance, but multiple cuttings will cause blade wear and cutting depth reduction, and will also significantly increase the risk of irregular tearing, dissection and other damage complications of the coronary artery vessel wall, thereby affecting the safety of the operation and the clinical application effect. SUMMARY

[0004] Therefore, the present application aims to provide a blade cutting balloon suitable for coronary artery stenosis to solve the technical problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a blade cutting balloon suitable for coronary artery stenosis, comprising a gas pump, a pressure indicator is installed on the outer wall of the end of the gas pump, an adapter is arranged at the end of the gas pump, the other end of the adapter is connected with a catheter, the end of the catheter away from the adapter is fixedly connected with a balloon body, a plurality of cutting blades extending to the outside of the balloon body are slidably connected to the inner wall of the balloon body, a fixed tube is fixedly connected to the inner wall of the balloon body, and a movable block is arranged on the inner wall of the fixed tube.

[0006] Preferably, the fixed cylinder is connected with a fixed pipe, a plurality of fixed cylinders are fixedly connected to the outer wall of the fixed pipe, the bottom end of the cutting blade is fixedly connected with an extension rod, and the extension rod is slidingly connected to the inner wall of the fixed cylinder.

[0007] Preferably, the inner wall of one end of the fixed pipe is fixedly connected with a first silica gel block, the outer wall of one end of the first silica gel block is fixedly connected with a plurality of sliding blocks matched with the inner wall of the fixed pipe, both ends of the movable block are fixedly connected with connecting rods, the first silica gel block is connected with the movable block through the connecting rods, and the end of the movable block away from the first silica gel block is connected with a resisting block through the connecting rod.

[0008] Preferably, the surface of the movable block is provided with an inclined groove, one group of the cutting blades are fixedly connected with a resisting rod, and the bottom end of the resisting rod is fixedly connected with an inclined block matched with the inclined groove.

[0009] Preferably, the surface of the movable block is provided with an inclined groove, one group of the cutting blades are fixedly connected with a resisting rod, and the bottom end of the resisting rod is fixedly connected with an inclined block matched with the inclined groove.

[0010] Preferably, the surface of the movable block is provided with an inclined groove, one group of the cutting blades are fixedly connected with a resisting rod, and the bottom end of the resisting rod is fixedly connected with an inclined block matched with the inclined groove.

[0011] Preferably, the surface of the movable block is provided with an inclined groove, one group of the cutting blades are fixedly connected with a resisting rod, and the bottom end of the resisting rod is fixedly connected with an inclined block matched with the inclined groove.

[0012] To sum up, the present application mainly has the following beneficial effects:

[0013] 1、The present application delivers the balloon body to the lesion site through the catheter, and the balloon body is radially expanded through the pressure of the air pump, so that the cutting blade is driven to be exposed and the calcified tissue is preliminarily cut, when the single cutting cannot completely cut the calcified tissue, the air pump is continuously pressurized to trigger the displacement of the moving plate, when the piston block is separated from the fixed pipe, the sealing state of the fixed pipe is released, the gas enters the inside of the fixed pipe cavity, and the extension rod drives the cutting blade to extend along the cutting direction, thereby applying targeted deep cutting pressure, to a certain extent, not only the damage problem caused by secondary cutting operation is avoided, but also the repeated cutting times of the cutting blade are reduced, unnecessary stimulation to the blood vessel tissue is reduced, and the efficiency and effect of cutting the calcified tissue are improved.

[0014] 2、The application can drive the cutting blade to accurately reset in the stretching out direction after the balloon body is contracted and the negative pressure is formed in the fixed tube, in the process, the abutting block can block the piston block, the movable block is moved by the cooperation of the inclined block on the abutting rod and the inclined surface of the inclined slot of the movable block, the stable movement in the resetting process is realized, when the cutting blade is completely retracted to the initial position, the gas in the fixed tube is completely discharged at this time, the sleeve sealing of the fixed tube can be completed under the synergistic effect of the piston block and the sealing block, the cutting blade is convenient for use next time, and the stretching out distance of the cutting blade is positively correlated with the pressure applied by the air pump and the pressure in the balloon, the accurate regulation of the cutting depth is realized, the clinical adaptability and operation flexibility of the device are improved to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure perspective view of the application;

[0016] Figure 2 It is a whole structure perspective view of the balloon body outside of the application;

[0017] Figure 3 It is a whole structure perspective view of the balloon body inside of the application;

[0018] Figure 4 It is a disassembled perspective view of the balloon body inside structure of the application;

[0019] Figure 5 It is a disassembled perspective view of the cutting blade and fixed tube structure of the application;

[0020] Figure 6 It is a side view plane schematic view of the movable block of the application.

[0021] In the figure: 1, air pump; 2, pressure indicator; 3, adapter; 4, catheter; 5, balloon body; 51, limiting block; 6, cutting blade; 61, extension rod; 62, abutting rod; 7, fixed tube; 71, fixed cylinder; 8, movable block; 81, inclined slot; 82, abutting block; 83, first silica gel block; 831, sliding block; 9, fixed block; 91, second silica gel block; 92, moving plate; 93, piston block; 94, sealing block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings of the embodiments of the application. The embodiments described below with reference to the drawings are exemplary and are used to explain the application, and cannot be understood as a limitation of the application.

[0023] The embodiments of the application will be described below according to the whole structure of the application.

[0024] A blade-cutting balloon suitable for coronary artery stenosis, such as Figure 1 - Figure 6 As shown, the device includes an air pump 1. A pressure gauge 2 is installed on the outer wall of the end of the air pump 1. The pressure gauge 2 can monitor the pressure inside the balloon body 5 in real time. The end of the air pump 1 is provided with a connector 3. The other end of the connector 3 is connected to a conduit 4. The air pump 1 and the conduit 4 can be connected through the connector 3. The end of the conduit 4 away from the connector 3 is fixedly connected to the balloon body 5. Multiple sets of cutting blades 6 extending to the outside are slidably connected to the inner wall of the balloon body 5. When the balloon body 5 inflates, the cutting blades 6 are exposed, so that the calcified components can be cut.

[0025] See Figure 3 - Figure 5 It is known that a fixing tube 7 is fixedly connected to the inner wall of the balloon body 5, and a movable block 8 is provided on the inner wall of the fixing tube 7. The fixing cylinder 71 is connected to the fixing tube 7, and multiple sets of fixing cylinders 71 are fixedly connected to the outer wall of the fixing tube 7. An extension rod 61 is fixedly connected to the bottom end of the cutting blade 6. The extension rod 61 is slidably connected to the inner wall of the fixing cylinder 71. When the internal pressure of the fixing tube 7 increases, the pressure pushes the extension rod 61 to move parallel to the inner wall of the fixing cylinder 71, which in turn drives the cutting blade 6 to extend. With the continuous pressurization of the air pump 1, the cutting blade 6 can be used to perform targeted deep cutting of the calcified components.

[0026] See Figure 5 It is known that a first silicone block 83 is fixedly connected to the inner wall of one end of the fixed tube 7, and multiple sets of sliders 831 that fit against the inner wall of the fixed tube 7 are fixedly connected to the outer wall of one end of the first silicone block 83. The sliders 831 facilitate the smooth movement of the movable block 8 on the inner wall of the fixed tube 7. Connecting rods are fixedly connected to both ends of the movable block 8. The first silicone block 83 and the movable block 8 are connected by connecting rods. The end of the movable block 8 away from the first silicone block 83 is connected to a stop block 82 by a connecting rod. The stop block 82 contacts the inner wall of the fixed tube 7 during movement. When the first silicone block 83 is not fully compressed, the stop block 82 can limit the piston block 93, thereby facilitating the discharge of gas inside the fixed tube 7 when the cutting blade 6 is retracted.

[0027] See Figure 5 and Figure 6 It is known that the surface of the movable block 8 is provided with a slanted groove 81, and a set of cutting blades 6 are fixedly connected to a stop rod 62. The bottom end of the stop rod 62 is fixedly connected to a slanted block that matches the slanted groove 81. When the slanted block on the stop rod 62 penetrates the inner wall of the slanted groove 81, when the cutting blade 6 retracts, the movable block 8 can be pushed to move under the cooperation of the slanted block and the slanted groove 81, thus canceling the limit of the stop block 82 on the piston block 93.

[0028] See Figure 3 and Figure 4It can be known that the second silica gel block 91 is fixedly connected to one side surface of the fixed block 9, and the moving plate 92 is fixedly connected to the side surface of the second silica gel block 91 away from the fixed block 9, when the pressure of the inner wall of the balloon body 5 increases, the moving plate 92 moves under the pressure, and then the second silica gel block 91 is extruded, so that the piston block 93 is separated from the fixed pipe 7.

[0029] Referring to Figure 3 It can be known that the sealing block 94 is fixedly connected to the side surface of the moving plate 92 away from the second silica gel block 91, the sealing block 94 can be sleeved on the outer wall of the fixed pipe 7, the piston block 93 is fixedly connected to the center position of one side surface of the moving plate 92, and the piston block 93 is conical, and the piston block 93 can be inserted into the inner wall of the fixed pipe 7, because the piston block 93 is conical, when the cutting blade 6 is not completely retracted, the gas in the fixed pipe 7 can flow out from the gap between the piston block 93 and the inner wall thereof, when the piston block 93 is completely inserted into the inner wall of the fixed pipe 7, the sealing block 94 is just attached to the fixed pipe 7, at this time, the cutting blade 6 is completely retracted, thereby facilitating the next use.

[0030] Referring to Figure 3 And Figure 4 It can be known that the balloon body 5 is fixedly connected with two groups of limiting blocks 51 on the inner wall, and the outer wall of the moving plate 92 is provided with two groups of limiting grooves matched with the limiting blocks 51, through the cooperation of the limiting blocks 51 and the limiting grooves, the parallel movement of the moving plate 92 is facilitated.

[0031] The working principle of the application is that: firstly, the balloon body 5 is delivered and positioned to the inside of the blood vessel through the catheter 4, and then the pressure inside the balloon body 5 is applied through the air pump 1, and the pressure value inside the balloon body 5 is monitored in real time through the pressure indicator 2;

[0032] After the balloon body 5 is subjected to the pressure input by the air pump 1, it expands radially, so that the cutting blade 6 is exposed and performs cutting operation on the calcified tissue in the blood vessel, when the single cutting of the cutting blade 6 cannot completely cut open the calcified tissue, the pressure inside the balloon body 5 can be continuously applied by the air pump 1, the moving plate 92 inside the balloon body 5 is displaced under the action of the pressure, the second silica gel block 91 is extruded, after the moving plate 92 moves, the piston block 93 removes the sealing state of the fixed pipe 7, the gas enters the chamber of the fixed pipe 7, the cutting blade 6 is driven to stretch out along the cutting direction and apply cutting pressure through the extension rod 61, so that the depth cutting of the calcified tissue is realized, and the necessity of secondary cutting is effectively reduced.

[0033] When the calcified tissue needs to be cut in other directions, the gas in the balloon body 5 is discharged by the air pump 1, at this time the balloon body 5 shrinks, the stop block 82 limits the movement of the plate 92 under the action of the first silica block 83, when the gas in the fixed pipe 7 is discharged, it is in a negative pressure state, thereby driving the cutting blade 6 to reset in the stretching direction, the stop rod 62 is embedded in the inclined groove 81 in the movable block 8, by means of the inclined block at the bottom of the stop rod 62 and the inclined surface of the inclined groove 81, the movable block 8 is pushed to move, the first silica block 83 is extruded, when the cutting blade 6 is completely retracted to the initial position, the piston block 93 is completely embedded in the fixed pipe 7, and cooperates with the sealing block 94 to realize the sleeve sealing of the fixed pipe 7, thereby completing the sealing operation of the fixed pipe 7;

[0034] Then the balloon body 5 is driven to rotate by the catheter 4, the cutting blade 6 is adjusted to the target cutting position, and the calcified tissue is cut again, the stretching distance of the cutting blade 6 is positively related to the applied pressure and the pressure in the balloon body 5, which can effectively reduce the repeated cutting times of the cutting blade 6 and improve the cutting efficiency and effect, the contents not described in detail in the description belong to the prior art known to those skilled in the art.

[0035] Although the embodiments of the present application have been shown and described, the specific embodiments are only an explanation of the present application, and are not a limitation of the application, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A blade cutting balloon suitable for coronary stenosis, comprising a gas pump (1) and a fixing block (9), characterized in that: The air pump (1) end outer wall is provided with a pressure indicator (2), one end of the air pump (1) is provided with a connector (3), the other end of the connector (3) is connected with a catheter (4), one end of the catheter (4) away from the connector (3) is fixedly connected with a balloon body (5), a plurality of cutting blades (6) extending to the outside of the balloon body (5) are slidably connected to the inner wall of the balloon body (5), a fixed tube (7) is fixedly connected to the inner wall of the balloon body (5), and a movable block (8) is arranged on the inner wall of the fixed tube (7). A plurality of fixed cylinders (71) are fixedly connected to the outer wall of the fixed tube (7), the fixed cylinder (71) is communicated with the fixed tube (7), and the bottom end of the cutting blade (6) is fixedly connected with an extension rod (61). The second silica gel block (91) is fixedly connected to one side surface of the fixed block (9), the movable plate (92) is fixedly connected to the side surface of the second silica gel block (91) away from the fixed block (9), the sealing block (94) is fixedly connected to the side surface of the movable plate (92) away from the second silica gel block (91), the sealing block (94) can be sleeved on the outer wall of the fixed tube (7), the piston block (93) is fixedly connected to the center position of one side surface of the movable plate (92), and the piston block (93) is conical.

2. The bladed cutting balloon for use in coronary stenosis according to claim 1, characterized in that: The first silica gel block (83) is fixedly connected to the inner wall of one end of the fixed tube (7), a plurality of sliding blocks (831) matched with the inner wall of the fixed tube (7) are fixedly connected to the outer wall of one end of the first silica gel block (83), the connecting rods are fixedly connected to both ends of the movable block (8), the first silica gel block (83) and the movable block (8) are connected through the connecting rods, and the resistance block (82) is connected to the end of the movable block (8) away from the first silica gel block (83) through the connecting rod.

3. The bladed cutting balloon for use in coronary stenosis according to claim 2, characterized in that: The surface of the movable block (8) is provided with an inclined groove (81), one group of the cutting blades (6) is fixedly connected with a resistance rod (62), and the bottom end of the resistance rod (62) is fixedly connected with an inclined block matched with the inclined groove (81).

4. The bladed cutting balloon for use in coronary stenosis according to claim 3, characterized in that: The balloon body (5) is fixedly connected with two groups of limiting blocks (51), and the outer wall of the movable plate (92) is provided with two groups of limiting grooves matched with the limiting blocks (51).

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