353 results about "Balloon dilations" patented technology

The invention provides a balloon dilatation catheter, and belongs to the technical field of balloon dilatation catheters. The balloon dilatation catheter comprises a catheter body, the far end of the catheter body is provided with a balloon body used for dilating a narrow part, and the near end of the catheter body is provided with an operating handle used for charging and discharging a filling medium into the balloon body. A flow channel allowing blood to penetrate through is formed in the balloon body and / or between the balloon body and the outer side wall of the catheter body in the axial extending direction of the catheter body, in the working process, after the balloon body is filled, a narrow part is treated, and the blood in the narrow part penetrates through the flow channel to continue to be circulated. The balloon is mainly used for solving the technical problems that in the prior art, when a balloon dilates, blood flow is blocked, consequently, far-end blood supply is insufficient, and the drug transfer effect is affected due to insufficient contact time of the balloon and the blood vessel wall.

Methods and apparatuses for insertion and / or pressurization of a balloon catheter for balloon dilation of anatomical passageways in the head of a person such as the Eustachian tube and Sinus passageways. The insertion devices comprise a balloon catheter guiding tube for receiving and guiding the balloon catheter, and a device body rigidly attached to a proximal end of the balloon catheter guiding tube. The pressurization devices comprise a syringe body with a syringe barrel, a proximal thruster guide section, external hand or finger engagement geometries, a plunger with a distal plunger head and a plunger rod, and a thruster having a proximal end with a finger or hand engagement portion.

Provided are a balloon catheter having a balloon with a large diameter and a high pressure resistance, a balloon catheter having a balloon that is easy to insert into a blood vessel, expands to a large diameter, and is also provided with a perfusion function when expanded, and a method for expanding a balloon of a balloon catheter.　This balloon catheter has: a shaft that extends in a longitudinal direction from a proximal side to a distal side; a first balloon that is provided to a distal section of the shaft; and a balloon group that is configured from a plurality of second balloons that are provided arranged side by side in the circumferential direction of the outer circumference of the first balloon. When the first balloon and the balloon group are expanded, neighboring second balloons constituting the balloon group are in contact with each other.

The invention discloses a real-time monitoring method and device for a cyclopharyngeal muscle catheter balloon dilatation, and the method comprises the steps: constructing a to-be-detected field domain model of the cyclopharyngeal muscle, and carrying out the finite element analysis to solve a potential distribution and sensitive matrix; the method comprises the following steps: injecting multi-frequency sine excitation current into a to-be-measured field domain of the cyclopharynx muscle catheter balloon dilatation, collecting boundary response voltage, performing multi-frequency synchronous demodulation to obtain a voltage amplitude and a phase, and inverting a conductivity change value distribution diagram under various reference frequencies by combining a sensitive matrix; and in combination with the obtained result, performing at least one operation of determining a catheter insertion position and determining a balloon dilatation state so as to obtain a real-time monitoring result of at least one of the catheter insertion position and the balloon dilatation state, and outputting the real-time monitoring result of the at least one of the catheter insertion position and the balloon dilatation state. The invention aims to provide non-invasive, non-radiation, real-time and accurate monitoring for the catheter balloon of the peripharyngeal muscle catheter balloon dilatation, accurately measure the catheter insertion position and the balloon dilatation state, and improve the safety of the peripharyngeal muscle catheter balloon dilatation.

The present invention provides a system and method for treating tight, hard-to-cross calcified lesions in which an angioplasty balloon is used to dilate the lesions and provide shock waves to restore normal blood flow in a patient's artery. An exemplary device includes an elongated tube and a balloon wrapped circumferentially around the tube and sealed to a distal end of the tube. During treatment, the device is advanced into a patient's vasculature and the balloon is inflated with conductive fluid such that the balloon is fixed to walls of the vasculature proximal to the calcified lesion. The balloon includes at least one low-profile emitter positioned near the distal end of the balloon, which may be activated to generate shock waves to break loose calcifications in the lesion. After calcium in the tight lesion has been modified, the balloon can be deflated and advanced further into the lesion to continue treatment.

The utility model provides a balloon dilatation catheter. The balloon dilatation catheter comprises a catheter body, a blood flow tube and a balloon, the blood flow tube comprises a first tube body and a second tube body, the second tube body is located in the first tube body, the outer wall of one side of the second tube body is connected with the inner wall of one side of the first tube body, and a blood flow cavity is formed between the outer wall of the other side of the second tube body and the inner wall of the other side of the first tube body; the balloon is connected to the outer wall of the first tube body in a sleeving mode, and a filling cavity is formed between the balloon and the first tube body; the far end of the catheter body is inserted into the second catheter body, and a first medium cavity is formed between the far end of the catheter body and the second catheter body; and a through part for communicating the first medium cavity with the filling cavity is arranged at the joint of the first pipe body and the second pipe body. The balloon dilatation device can solve the problem of blood flow supply of a far-end blood vessel in the balloon dilatation period.

Methods and apparatus for inserting and / or pressurizing a balloon catheter to balloon dilate anatomical channels, such as Eustachian tube and sinus channels, in a human head. The insertion device includes a balloon catheter guide tube for receiving and guiding a balloon catheter, and a device body rigidly attached to a proximal end of the balloon catheter guide tube. A compression device includes a syringe body having a syringe barrel, a proximal pusher guide section, an external hand or finger engagement geometry, a plunger having a distal plunger head and a plunger rod, and a pusher having a proximal end with a finger or hand engagement portion.

The present invention relates to the technical field of intravascular self-expanding stent delivery, and discloses a rapid exchange balloon stent installation device and a stent installation method. The rapid exchange balloon stent installation device is used to install the self-expanding stent in the diseased part of the blood vessel, and includes a balloon dilatation catheter, a micro guidewire and a stent release tube. The balloon dilatation catheter is provided with a first through hole along the length direction, and a wire threading hole is provided on the side wall of the first through hole; the micro guidewire can enter the first through hole through the distal end of the balloon dilatation catheter and pass through the wire threading hole; the distal end of the balloon dilatation catheter is provided with an expansion part, and the self-expanding stent can be slidably installed in the first through hole, and the self-expanding stent is located at the distal end of the balloon dilatation catheter; the stent release tube is slidably arranged in the first through hole of the balloon dilatation catheter, and the distal end of the stent release tube abuts against the self-expanding stent. By installing the balloon dilatation catheter once, the delivery and installation of the self-expanding stent can be realized, thereby improving the success rate of the operation.

The invention discloses a perfusion mastoid balloon and a balloon dilatation catheter, and relates to the technical field of medical instruments. The perfusion mastoid balloon comprises a balloon main body, mastoids and a fluid channel, the mastoid process and the balloon main body are integrally formed or separately formed; the fluid channel is formed in the peripheral wall of the balloon body and extends in the length direction of the balloon body to allow liquid to pass through, and the size of the fluid channel in the radial direction of the balloon body is smaller than or equal to the size of the mastoid in the radial direction of the balloon body. The structure of the perfusion mastoid balloon is improved, the expansion time of the perfusion mastoid balloon is effectively prolonged, a narrow area can be better expanded, and meanwhile blood vessel blockage is avoided.

The invention discloses a covered stent and a balloon dilatation covered stent system, and relates to the technical field of medical instruments.The covered stent comprises a stent body connected through a tubular covering film, and the covered stent has a non-load state with the zero compression diameter and a load state which has the compression rate relative to the non-load state and is used for supporting blood vessels to recover blood flow; when the compression ratio of the covered stent is 10%, the numerical range of the radial supporting force of the covered stent is 2.0 N / mm-6. 0N / mm. The balloon dilatation covered stent system comprises an elastic pipe sleeve, a balloon, a mandrel and a covered stent, the covered stent, the elastic pipe sleeve, the balloon and the mandrel are sequentially arranged from outside to inside in a sleeving mode, and the two ends of the balloon are sealed with the mandrel; the near end of the elastic tube sleeve is fixedly connected with the mandrel or the near end of the balloon; and the far end of the elastic tube sleeve movably sleeves the balloon. The covered stent can provide moderate support for blood vessels, and the problems of lumen restenosis and stent collapse after an existing covered stent is implanted can be effectively solved.

The invention provides a matrix type balloon dilatation system, and belongs to the technical field of balloon catheters. The system comprises a catheter, a balloon assembly, a filling medium storage part and a flow control part, the balloon assembly is arranged at the position, close to the far end by a set distance, of the catheter, the balloon assembly is provided with a plurality of rows of balloon units arranged in the axial direction of the catheter, and each balloon unit is provided with a plurality of sub-balloon bodies arranged in the circumferential direction of the catheter; each sub-balloon body is used for independently filling or scaling; the filling medium storage part is communicated with the near end of the catheter and is used for providing a filling medium for each sub-balloon body; the flow control part is communicated with the filling medium storage part and is used for controlling filling or scaling of each sub-balloon body according to the pressure in the balloon assembly; the technical problems that in the prior art, the overall filling shape of a balloon cannot be flexibly adjusted, normal blood vessels are prone to being damaged, and a patient feels uncomfortable obviously are mainly solved.

The invention discloses a mastoid balloon and a balloon dilatation catheter, and relates to the technical field of medical instruments. The mastoid balloon comprises a balloon main body, an expandable body and a plurality of bulges, the expandable body is arranged on the peripheral wall of the balloon main body and extends along the length direction of the balloon main body, and the expandable body is provided with a fluid inlet for introducing fluid and a fluid channel communicated with the fluid inlet, so that the expandable body can expand or contract under the action of the fluid; the protrusions are arranged on the expandable body and distributed at intervals in the length direction of the expandable body. The convex point structure of the mastoid balloon is improved, the height of the convex points can be adjusted, the balloon is effectively prevented from sliding when a stenosis lesion is expanded, and the treatment effect and efficiency are improved.

The invention belongs to the technical field of medical instruments. The invention discloses a drug coating balloon catheter and a preparation method thereof. In one aspect, a drug coated balloon catheter includes a catheter with a balloon; a drug coating at least comprising an inner coating and an outer coating is arranged on the outer wall of the balloon, and the inner coating and the outer coating are provided with drug active ingredients and different carriers respectively; when the balloon is expanded, the inner coating and the outer coating are separated from the balloon through the state change of the temperature-sensitive carrier of the inner coating under the body temperature environment of a patient and the hydration effect, and the outer coating is used for promoting corresponding active pharmaceutical ingredients to be transferred into target tissues through the carrier of the outer coating when the outer coating is separated from the balloon. On the other hand, the invention provides a preparation method of the drug coating balloon catheter. The preparation method has the advantages that the adhesiveness of the drug coating on the balloon can be effectively improved so as to reduce the delivery loss, and the release rate of the drug coating on diseased tissues can be improved so as to improve the drug transfer capacity.

The visual balloon type urethral dilation device comprises a urethral endoscope and a balloon dilator arranged in the urethral endoscope in a penetrating mode, and the urethral endoscope and the balloon dilator are matched with the urethra of the human body. The observation field of view of the urethra endoscope covers the dilation balloon of the balloon dilator, and visual dilation of the dilation balloon is achieved. The balloon dilator is provided with an independently-controlled fixing balloon, the fixing balloon and a balloon-shaped cavity in the urethra endoscope probe form a detachable fixing structure, the balloon dilator can penetrate through a middle shaft of the probe to move axially when fixing is removed, and the guiding function of the probe is achieved. The balloon dilator can be used in a disposable mode, and cross infection is prevented. And the probe is provided with a panoramic camera and a light supplementing lamp which are symmetrical, so that the visualization precision is improved. The urethra dilatation operation accuracy, safety and diagnosis and treatment efficiency are greatly improved from the aspects of high visualization, dilatation precision adjustment and the like.

An expansion controllable support for a balloon dilatation catheter comprises a support middle section, two ends and a fixed end, the two ends of the support middle section are connected with the fixed end respectively, the support middle section is of a telescopic structure, and the two ends of the support middle section are of a chain-shaped structure formed by connecting variable-diameter constraint rings. And the middle section of the bracket is axially connected with the fixed end through restraint rings from large to small in sequence. The two ends of the dilatation controllable stent are composed of the multi-stage variable-diameter restraint rings, the blood vessel damage is minimized while balloon dilatation is guaranteed, it can be guaranteed that the balloon recovers to the structural state before dilatation during pressure relief withdrawing, and the withdrawing performance of a balloon catheter is improved; the axial restraining rod is arranged in a penetrating mode, circumferential rotation or axial displacement of the balloon during expansion can be effectively prevented, and it is guaranteed that the balloon is accurately positioned in a blood vessel; when the balloon expands, the balloon protrusions protrude out of the grids, the pressure in the balloon is concentrated, the high-pressure expansion effect is achieved, stress is even, expansion is safer, and the expansion controllable support can control excessive expansion of the balloon.

The utility model relates to the technical field of pressure pumps, in particular to a balloon dilatation pressure pump, which comprises a sleeve, a pressure gauge arranged at the bottom of the sleeve, a guide hose embedded at the bottom of the pressure gauge and communicated with the inside of the sleeve, a threaded rod arranged in the sleeve, a scale line observation window arranged on the outer wall of the sleeve, and a positioning block sleeved on the outer wall of the sleeve and close to the left end. The threaded column is sleeved with a fixing cap, a push handle is arranged at the left end of the threaded rod, and an air guide pipe is arranged on the left side face of the push handle. According to the balloon dilatation pressure pump, the sleeve with the pressure gauge is arranged, the change condition of internal pressure can be observed in real time, the threaded rod with the push handle is arranged in the sleeve in a sleeved mode, the piston column is matched with the sleeve in an inserted connection mode, the air guide pipe is matched with the threaded rod, and under matching of the control valve, the sealing plug is manually controlled to achieve internal inflation matching; and the threaded rod is in threaded connection with the first screw hole in the fixing cap, so that stable combination, installation and matching are facilitated, quick disassembly and replacement are facilitated, replacement after the threaded rod is damaged is facilitated, and resource waste is reduced.

The invention discloses a perfusion balloon dilatation catheter which comprises a catheter body. The balloon is arranged on the periphery of the tube body in a surrounding mode, the balloon comprises an inner balloon layer facing one side of the tube body and an outer balloon layer backing on one side of the tube body, the inner balloon layer and the outer balloon layer are connected to form a balloon cavity, the extensibility of the inner balloon layer is lower than that of the outer balloon layer, and after the balloon is expanded, the inner balloon layer and the outer balloon layer are connected to form the balloon cavity. A fluid channel is formed between the inner bag layer and the tube body. Due to the fact that the extensibility of the inner balloon layer is lower than that of the outer balloon layer, after the balloon is filled with fluid and expands, the balloon is easier to expand outwards, the deformation expansion degree of the inner balloon layer is smaller than that of the outer balloon layer, and a fluid channel between the inner balloon layer and the catheter body is not prone to being reduced along with expansion of the balloon. And the circulation effect of other fluids such as blood or medicines is not influenced.

The utility model discloses a balloon catheter for releasing drugs in a human body cavity. The balloon catheter comprises a three-cavity catheter, a drug delivery balloon and an expansion balloon, wherein the drug delivery balloon and the expansion balloon are arranged on the three-cavity catheter; the dilatation balloon is located in the drug delivery balloon, a drug delivery space is formed between the outer surface of the dilatation balloon and the inner surface of the drug delivery balloon, nylon strips are arranged on the outer surface of the drug delivery balloon, and drug release micropores are formed in the positions, between the nylon strips, of the balloon wall of the drug delivery balloon. The trachea can be expanded, drug treatment can be performed on narrow positions, multiple instruments are not needed to be matched for use, discomfort of a patient caused by the fact that the multiple instruments enter the airway for multiple times is avoided, and the risk of scratching the trachea is reduced; the dosage can be accurately controlled, and excessive liquid medicine is prevented from entering the human body; the operation is simpler, non-invasive treatment of the natural cavity of the human body can be achieved, foreign matter does not need to be implanted, and the operation can be repeated.

The utility model relates to the technical field of medical instruments, in particular to a multifunctional biliary tract drainage tube with double-cavity sacculus auxiliary expansion through a PTCD (percutaneous transluminal compact disc) way, which comprises a drainage tube, a sacculus expansion tube group, a water injection tube and a sacculus, the fixing shell set comprises a drainage tube fixing shell and a water injection tube fixing shell arranged on the periphery of the drainage tube fixing shell, the drainage tube fixing shell is connected with the drainage tube, and the water injection tube fixing shell is connected with the water injection tube; the internal and external intercommunication window is communicated with a first area on the drainage tube and a second area, corresponding to each other, on the water injection tube, so that bile outside the water injection tube flows into the drainage tube through the internal and external intercommunication window. The multifunctional biliary tract drainage tube for assisting expansion through the PTCD way double-cavity balloon integrates biliary tract expansion and bile drainage, operation is reduced, and operation cost can be greatly reduced.

To provide a balloon catheter having a high-pressure resistant balloon of a large diameter.SOLUTION: A balloon catheter includes: a shaft extending in a longitudinal direction from a proximal side to a distal side; and a balloon group composed of a first balloon disposed in a distal part of the shaft and a plurality of second balloons disposed aligned in a circumferential direction of the periphery of the first balloon. In a state that the first balloon and the balloon group are expanded, the adjacent second balloons constituting the balloon group come in contact with each other.SELECTED DRAWING: Figure 2

The shock wave balloon dilatation catheter comprises a dilatation balloon, an outer tube and an inner tube, the far end of the inner tube extends out of the far end of the outer tube, the near end of the dilatation balloon is connected with the far end of the outer tube in a sealed mode, the far end of the dilatation balloon is connected with the far end of the inner tube in a sealed mode, and the corona generator is arranged in the dilatation balloon. The corona generator comprises at least one electrode set, each electrode set comprises at least one first electrode connected with the positive wire and at least one second electrode connected with the negative wire, and the first electrodes and the second electrodes in the electrode sets are arranged at intervals. The first electrode and the second electrode are provided with discharge areas which are in contact with electrolyte liquid filled in the cavity of the dilation balloon, so that an electric field is formed between the first electrode and the second electrode, and the first electrode and the second electrode are fixed on the inner tube. Compared with the prior art, the safety, operability, reusability and accurate controllability of the balloon catheter can be improved.

According to the puncture assembly for the trigeminal nerve meniscus balloon compression operation under local anesthesia, firstly, an anesthetic needle is designed to be of a detachable structure and can be arranged in a puncture needle in a sliding and sleeving mode, and precise local anesthesia is conducted firstly in the puncture process; then the same puncture channel is used for carrying out subsequent balloon catheter insertion operation; and secondly, the balloon is fixedly arranged at the front end of the balloon catheter and is connected with the balloon dilatation pressure pump, so that moderate compression on the trigeminal nerve meniscus can be realized by accurately controlling the filling degree of the balloon in the operation process. Meanwhile, the pressure pump has a real-time monitoring function on the internal pressure of the balloon, so that an important reference basis is provided for doctors, the safety and effectiveness of surgical operation are ensured, and nerve injury or other negative effects caused by overhigh pressure of the balloon are avoided.

The invention relates to a medicine balloon dilatation catheter and a using method thereof.The medicine balloon dilatation catheter comprises an inner tube, an outer tube, a balloon, medicine patches and a supporting mechanism, the supporting mechanism comprises a supporting piece and a push-pull piece which have an initial state and a supporting state, the supporting piece is provided with a plurality of supporting parts which are arranged corresponding to the medicine patches and located in the balloon, and the push-pull piece is arranged on the outer tube; when the supporting piece is in an initial state, the supporting part is straightened and is not in contact with the balloon; when the supporting piece is in the supporting state, the supporting part arches outwards and can jack up the medicine patch corresponding to the supporting part outwards. The supporting part on the supporting mechanism arches outwards and jacks up the medicine patch, on one hand, the medicine patch can be attached to the lesion blood vessel wall in advance, so that medicine is released in advance, and inflammation caused by blood vessel opening is relieved; on the other hand, part of the balloon wall is anchored on the blood vessel wall, so that the balloon is prevented from shifting in the expansion process, and the stability is better.

A diametrically adjustable endoprosthesis includes a controlled expansion element extending along at least a portion of a graft and is supported by a stent. The controlled expansion element diametrically constrains and limits expansion of the endoprosthesis. Upon deployment from a smaller, delivery configuration, the endoprosthesis can expand to the initial diameter set by the controlled expansion element. Thereafter, the endoprosthesis can be further diametrically expanded (e.g., using balloon dilation) by mechanically altering the controlled expansion element.

The invention discloses a balloon dilatation catheter and a blood vessel dilatation device. The balloon dilatation catheter comprises an inner tube, an outer tube, a catheter base and a balloon, and a guide wire is arranged in the inner tube in a penetrating mode; the outer pipe is sleeved on the inner pipe; a first inlet and a second inlet are formed in the guide pipe seat, the first inlet is communicated with the inner pipe, and the second inlet is communicated with the outer pipe; the multiple balloons are sequentially arranged on the inner tube in a sleeving mode, and the interiors of the balloons are communicated with the outer tube. First grooves are uniformly distributed in the side surface of the balloon; when the balloon dilatation catheter is used, media are introduced into the balloons through the second connectors to enable the balloons to be filled and expanded, the flat portions, adjacent to the first grooves, of the balloons form occipital portions, the adjacent balloons make contact with each other to form the second grooves, the occipital portions can exert pressure on diseased regions to conduct dilatation, and therefore the diseased regions can be dilated. The first grooves and the second grooves which are evenly distributed can buffer stress borne by the released blood vessel during expansion, blood vessel injuries and interlayers are reduced, and meanwhile the treatment safety of a patient is guaranteed.

The present disclosure provides a balloon dilation catheter that includes a handle (102), a substantially rigid inner guide member (108) coupled to the handle, a shaft (118) arranged over the inner guide member, a balloon (120) coupled to the inner guide member, and a polymer ball tip (122) positioned at a distal end of the balloon. To treat a sinus drainage pathway of a subject using the balloon dilation catheter, the substantially rigid inner guide member is positioned into the drainage pathway of the sinus of the subject via a nasal passageway. The balloon is then inflated to expand or otherwise remodel the drainage pathway.

Disclosed is a valve balloon suction catheter, comprising a tip, a balloon, a catheter, and a handle base in sequence from a distal end to a proximal end, the catheter being provided with a fluid passage lumen. The balloon consists of at least four balloon bodies, which are distributed circumferentially around the catheter to form a circular configuration, so as to create a blood flow channel in the center of the balloon, the blood flow channel being arranged in the axial direction of the balloon. A micro axial flow pump is provided in the blood flow channel and is arranged on the catheter, and a guidewire conduit penetrating through the micro axial flow pump is provided in the micro axial flow pump. A distal end of the guidewire conduit passes through the blood flow channel and is fixedly connected to the tip, and a proximal end of the guidewire conduit penetrates through the handle base. A guidewire lumen is provided in the guidewire conduit. The micro axial flow pump is connected to an external impeller drive interface arranged at a proximal end of the handle base. Compared with the prior art, the combination of balloon dilatation and mechanical circulatory assistance establishes a drainage pathway from the left ventricle to the ascending aorta, enabling cardiac blood circulation and improving the safety of the procedure.

The invention discloses a perfusion balloon and a balloon dilatation catheter, and relates to the technical field of medical instruments. The perfusion balloon comprises a fillable body and at least one hollow component, a concave part and a convex part which are connected with each other at least in a full state are formed on the peripheral wall of the fillable body; the at least one hollow assembly is arranged on the peripheral wall of the fillable body and extends in the length direction of the fillable body, and the hollow assembly and the sunken part jointly form a blood flow channel allowing blood to pass through. The structure of the perfusion balloon is improved, a blood flow channel is formed between the periphery of the perfusion balloon and the blood vessel wall, fluid in the blood vessel is allowed to flow when the balloon expands, longer balloon expansion time is allowed, and the risks of ischemia and tissue damage are reduced.

To provide a catheter capable of reducing a risk of closing an unintended blood vessel such as a peripheral blood vessel by leak or dispersion of a high polymer material such as an embolic agent.SOLUTION: A catheter 2 includes: a shaft 3 which is the shaft 3 having one or more expanded lumens 11 for balloon expansion, and a delivery lumen 12 of a high polymer material, and has an opening 4 for communicating the delivery lumen 12 and the outside of the shaft 3; a first balloon 21 which is the first balloon 21 disposed at a distal side from the opening 4, and in which the inside is communicated with one of the one or more expanded lumens 11; and a second balloon 22 which is the second balloon 22 disposed at a proximal side from the opening 4, and in which the inside of the second balloon 22 is communicated with the expanded lumen 11 different from the expanded lumen 11 communicated with the inside of the first balloon 21 of the one or more expanded lumens 11, or the expanded lumen 11 communicated with the inside of the first balloon 21.SELECTED DRAWING: Figure 2

The invention provides a balloon, a balloon dilatation catheter and a stent system, and particularly provides a balloon, a balloon dilatation catheter and a stent system suitable for bifurcated vascular lesion areas. The balloon comprises a balloon body, a far-end body and a near-end body, the far-end body comprises a first cone part, the near-end body comprises a second cone part, and at least the size of the cone angle alpha 1 of the first cone part and the size of the diameter d of the balloon in the expansion state meet the following relational expression: alpha 1 = k1ld + b1; wherein k1 belongs to [11.009, 21.478], b1 belongs to [7.98, 20.8], d is more than or equal to 5 and less than or equal to 16, and d is a positive integer. The balloon dilatation catheter comprises the balloon, a pushing tube and a catheter seat. According to the balloon, the balloon dilatation catheter and the stent system, the structure of the balloon is improved and optimized, and the balloon, the balloon dilatation catheter and the stent system are simple in structure, easy to produce, capable of achieving industrialization, low in cost, easy to operate clinically and capable of accurately releasing and positioning the stent. Therefore, the positioning accuracy of the stent in a bifurcated vascular lesion area and the success rate of an operation are greatly improved.