105 results about "Dilatation catheter" patented technology

Elongate medical devices with an expandable structure including elongated splines and a distal hub. An elongate medical device includes a handle including a control mechanism, a catheter shaft, an expandable structure including elongated splines and a distal hub, wherein each of the elongated splines includes a shape memory material and an interactive element, wherein each of the elongated splines includes a respective spline proximal end and a spline distal end, wherein each of the spline proximal ends is connected to the catheter shaft distal end, and wherein each of the spline distal ends is connected to the distal hub, and a deflection control member connected to the distal hub, wherein the control mechanism is drivingly coupled to the distal hub via the deflection control member and operable to selectively vary a position of the distal hub relative to the catheter shaft distal end to selectively vary an amount of expansion of the expandable structure, wherein a shape of the expandable structure is produced via a combination of the shape memory material and the position of the distal hub relative to the catheter distal end.

The invention relates to the technical field of medical instruments, in particular to a paclitaxel drug coating balloon dilatation catheter and a preparation method and application thereof.The paclitaxel drug coating comprises a substrate layer, a middle layer and an outer layer; the substrate layer comprises paclitaxel and a hydrophilic excipient; the middle layer comprises a lipophilic excipient and a temperature response type polymer; and the outer layer comprises a pH sensitive polymer. The substrate layer is combined with the surface of the balloon, so that excellent conveying stability is provided, the medicine is effectively prevented from falling off prematurely in the conveying process of the catheter, and the firmness of the coating is improved; a micropore network structure is formed in the middle layer, the network structure is expanded under the body temperature condition, the porosity is increased, slow release of the medicine is achieved, the absorption amount of the medicine on the blood vessel wall is effectively increased, and the medicine effect time is prolonged; the solubility of the outer layer is improved in a slightly acidic blood vessel wall environment, so that the release of the medicine is further promoted, and the effective release of the medicine on the blood vessel wall is ensured.

The invention relates to the technical field of manufacturing of medical instruments, in particular to an intracranial controllable drug balloon dilatation catheter and a drug delivery method for a narrow area of a blood vessel. According to the intracranial controllable medicine balloon dilatation catheter, the inner-layer catheter body is arranged in the outer-layer catheter body in a sleeved mode and fixedly connected with the far end of the outer-layer catheter body; the balloon is assembled on the outer-layer tube body and is provided with a plurality of dosing holes along the circumferential direction; a medicine adhesion layer is compounded on the surface of the balloon section of the outer-layer tube body; the stress releasing pipe is connected to the end, close to the operation end, of the outer-layer pipe body. The Y-shaped tube base is connected to the end, away from the outer-layer tube body, of the stress releasing tube, one connector is connected with an injection device to inject medicine carriers into the balloon, and the other connector is used for a guide wire to penetrate through. When intracranial vascular stenosis is treated, directional drug release can be achieved by means of the drug delivery holes and the drug adhesion layer. The medicine is sprayed to the focus through the administration hole, the medicine is promoted to permeate into the middle layer of the blood vessel wall through the attaching force generated by the balloon expansion, the problems of non-uniform liquid medicine distribution, insufficient permeation and the like are effectively solved, and the local medicine concentration and the treatment effect are improved.

The embodiment of the invention provides an expansion catheter device. The dilation catheter device comprises a catheter body assembly and a balloon body assembly. The pipe body assembly comprises a first pipe body and a second pipe body which extend in the same axial direction and can move relative to the axial direction. The second pipe body penetrates through the first pipe body. The balloon body assembly comprises an expansion balloon body and an interception balloon body which are arranged at the far end of the second tube body at an interval; the expansion bag body and the interception bag body are arranged in an expandable or contractible mode. Wherein the expansion bag body and the interception bag body are used for inputting filler to expand when the bag body assembly is exposed out of the first tube body along with relative axial movement, and a thrombus interception space is defined by the expansion bag body and the interception bag body and the blood vessel wall, so that at least part of thrombus extruded by the expansion bag body enters the thrombus interception space; and the first tube body enters the thrombus interception space to perform thrombus suction action. The expanded intercepting capsule body can intercept part of thrombus which falls off due to extrusion, and the thrombus is prevented from flowing to the far end of a blood vessel and causing embolism; and the first tube body can also suck the intercepted part of thrombus out of the body.

The invention relates to the technical field of medical apparatus and instruments, and discloses a balloon dilatation catheter which comprises an inner tube, an outer tube, a balloon and a rotating adapter. And the outer pipe sleeves the outer side of the inner pipe. The balloon sleeves the outer side of the far end of the inner tube, the far end of the balloon is connected and sealed with the far end of the inner tube, and the near end of the balloon is connected with the far end of the outer tube. The rotating adapter sleeves the outer side of the near end of the inner tube, the far end of the rotating adapter is connected with the near end of the outer tube, the rotating adapter is used for driving the outer tube to rotate relative to the inner tube, and the balloon is suitable for rotating relative to the inner tube under the driving of the outer tube and forming a torsional folding state. After pressure relief of the balloon is completed, the near end of the balloon can be driven to rotate relative to the far end by rotating the adapter and the outer tube until the balloon is in a twisted folded state, the balloon in the twisted folded state can reduce the outer diameter of the balloon to a great extent, the operation difficulty of withdrawing the balloon is reduced, and damage to the blood vessel wall when the balloon is withdrawn is avoided.

The utility model relates to the technical field of dilation catheters, and discloses a double-cavity tube of a PTA (pure terephthalic acid) balloon dilation catheter, which comprises a handle component, a double-cavity tube fitting is fixedly connected to the side end of the handle component, a guide seat is fixedly connected to the bottom end of the double-cavity tube fitting, an insertion opening is formed in the bottom end of the guide seat, and a through hole is formed in the insertion opening. According to the utility model, through the cooperative arrangement of the guide seat, the protection assembly, the extension plate and other structures, if a medical worker accidentally touches the pull plate in the process of operating the double-cavity pipe fitting, the spring is driven to be stretched, and the spring is immediately shrunk after being stretched, so that the safety of the double-cavity pipe fitting is ensured, and the safety of the double-cavity pipe fitting is ensured. The protection plate is still in a closed state, so that most of the protection plate is not easy to open due to accidental touch of medical staff, and pollutants are not easy to enter a guide wire cavity.

Elongate medical devices with an expandable structure including elongated splines and a distal hub. An elongate medical device includes a handle including a control mechanism, a catheter shaft, and an expandable structure including elongated splines and a distal hub. Each of the elongated splines includes a shape memory material and an interactive element. Each of the elongated splines includes a respective spline proximal end and a spline distal end. Each of the spline proximal ends is connected to the catheter shaft distal end. Each of the spline distal ends is connected to the distal hub. A deflection control member is connected to the distal hub. The control mechanism is drivingly coupled to the distal hub via the deflection control member and operable to selectively vary a position of the distal hub relative to the catheter shaft distal end to selectively vary an amount of expansion of the expandable structure.

The invention provides a pressure adjusting system and a method for adjusting the pressure of fluid in an inner cavity of medical equipment, and relates to a method for controlling a pressure control pump to enable the pressure of the fluid in the inner cavity of the medical equipment to change within a period of time. A coronary artery blood vessel remodeling catheter, a peripheral balloon dilatation catheter, a peripheral blood vessel remodeling catheter, an intracranial laser balloon dilatation catheter, a drug coating balloon dilatation catheter, a photodynamic balloon catheter, a mastoid balloon catheter, a constraint type balloon dilatation catheter and a spinous process balloon can be made. Expansion and contraction of a balloon body in a balloon catheter such as a drug delivery balloon catheter are regularly changed within a period of time, and therefore the treatment effect is better achieved.

The utility model relates to an intracranial laser balloon dilatation catheter, which comprises a catheter, a laser balloon fixed on the catheter and communicated with the catheter, and a catheter seat fixed and communicated with one end, far away from the laser balloon, of the catheter, a positioning claw is arranged on one side, close to the catheter seat, of the laser balloon, and the positioning claw is fixed on the catheter. The positioning claws are in a funnel shape formed by annularly arranging a plurality of positioning wires, and the ends, with the large opening diameter, of the positioning claws face the laser balloon; the utility model has the advantages that when the laser is continuously irradiated, the laser can be ensured to irradiate in the middle and the blood circulation can be ensured.

The invention discloses a drug-coated prostate balloon dilatation catheter control system, relates to the technical field of medical instruments, and aims to solve the technical problems of uncontrollable drug release, extensive dilatation process and lack of quantitative evaluation in existing drug balloon therapy. The system integrates a high-precision pressure sensing module, a micro piezoelectric pump control module, a man-machine interaction module and a data processing module. The system carries out real-time closed-loop control on the internal pressure of the balloon through a self-adaptive PID algorithm, and precise execution of a preset pressure curve is achieved. The innovation of the method lies in that a drug release quantitative estimation model based on pressure-time integration (AUC) is created for the first time, the model can calculate and display the estimated drug release amount in the treatment process in real time, and physical operation parameters are directly associated with biological effects; the device has the effects of realizing accurate and constant control of the dilatation pressure and improving the operation safety.

The utility model provides a kind of nipple cutting balloon dilatation catheter, comprising: the balloon part of being arranged in the front part of catheter, the tube wall of the balloon part is wrapped with balloon, the outer surface of the balloon is equipped with multiple knife filaments, and the knife filament is used to be connected with high frequency generator.The utility model can be sent into or pulled out duodenal nipple in the guide of guide wire, and dilate duodenal nipple, when nipple sphincter stenosis appears, handle joint connects high frequency generator, and the knife filament on the surface of balloon can carry out electroincision effect to the tissue of stenosis, increase stenosis dilatation efficiency and effect.

To provide a coating for an intraluminal expandable catheter providing contact transfer of drug micro-reservoirs.SOLUTION: A coating for an expandable portion of a catheter comprising a lipophilic matrix and a plurality of micro-reservoirs dispersed in the lipophilic matrix is disclosed. The plurality of micro-reservoirs comprises an active agent. A coating formulation and a method for forming the coating are also disclosed. A catheter comprising the coating on the expandable portion and a method for treating a condition are also provided.SELECTED DRAWING: Figure 1

The present invention discloses a shock wave balloon dilation catheter comprising a balloon and a dilation catheter. The balloon includes a blood flow passage on its outer circumference and / or interior, extending axially and penetrating through the outer circumference and / or center. A shock wave generator is arranged within the balloon chamber, where conductive fluid can be introduced. The distal end of the dilation catheter passes through or into the balloon and is sealedly connected to the balloon. A fluid passage in the catheter communicates with the balloon chamber, and the shock wave generator is fixed to the portion of the catheter within the balloon. The dilation catheter is provided with a guide wire lumen. The present invention further discloses a shock wave balloon dilation catheter for tricuspid valve openings, which designed to avoid blood flow blockage and reduce the hemodynamic impact during the procedure, enhancing safety and treatment effectiveness.

The invention relates to the technical field of medical catheters, and particularly discloses a telescopic microneedle medicine balloon dilatation catheter which comprises a catheter assembly and a balloon body located at the far end of the catheter assembly and further comprises a plurality of microneedle puncture units located outside the balloon body. The microneedle puncture unit comprises a containing sleeve, a microneedle assembly and an elastic driving part, the top end and the bottom end of the containing sleeve are open, a plugging cover is arranged at the top end of the containing sleeve, a puncture seam is formed in the middle of the plugging cover, the microneedle assembly is slidably arranged in the containing sleeve in a sleeved mode, and the elastic driving part is connected to the opening in the bottom end of the containing sleeve. When the balloon body expands and is extruded by the outside, the elastic driving part is extruded to enable the elastic driving part to generate elastic deformation, and then the puncture end of the microneedle assembly is driven to penetrate through the puncture seam and be ejected and punctured out. And the microneedle easily breaks through the hard calcified shell and enters the hard calcified shell, so that the effective establishment of a drug delivery channel is ensured.

The present application relates to a kind of balloon dilatation catheter, including balloon, inner tube, outer tube, liquid guide component and support assembly, liquid guide component is sleeved on the outside of inner tube, its proximal end is connected on the proximal end pin of outer tube and / or balloon and is formed with gas storage passage between proximal end pin, distal end stretches into balloon distal end and forms liquid guide cavity between inner tube;Support assembly includes first support component between liquid guide component and inner tube and allows the passage of filling liquid.By setting liquid guide component, filling liquid flows into balloon from balloon distal end, avoid the aggregation of air at the distal end of balloon and affect the distal end development, while configuring gas storage passage in the proximal end of balloon, air that is driven to the proximal end of balloon is gathered in gas storage passage, and proximal end development is not affected;The present application also passes through the design of the groove of inner tube and support assembly, so that the filling liquid in balloon can be smoothly extracted, and it is beneficial to the back embrace of balloon, and the balloon is conveniently taken out.

High-density flat balloon catheter The present invention relates in general to an expandable catheter used in electrophysiology, and more specifically to a high-density balloon catheter used for the diagnosis and / or treatment of cardiac arrhythmias. The catheter includes an elongated catheter shaft having a proximal end and a distal end. The elongated catheter shaft defines a longitudinal axis. The catheter includes an expandable assembly having a first delivery configuration and a second deployment configuration. The balloon member includes at least one flexible framework positioned between outward and inward layers on the upper and / or lower surfaces of the balloon member, and at least one plurality of electrodes patterned on the flexible framework. In some embodiments, a flat balloon member includes electrodes on both sides of the planar balloon member. The balloon member may include a flexible structural element positioned within an internal cavity.

The present disclosure relates generally to the use of medical instruments for treating chronic venous disease and collagenous scar tissue. In particular, the present disclosure provides methods and systems for remodeling collagen obstructions using energy and expandable catheters.

The utility model discloses a novel coronary artery balloon dilatation catheter, which relates to the technical field of medical instruments and comprises a catheter, the outer surface of the catheter is connected with a balloon, the surface of one end of the catheter is connected with a probe in a penetrating manner, and the outer surface of one end of the catheter is provided with an adjusting unit. A plurality of miniature blades are annularly arranged on the outer surface of the balloon, the catheter is matched with the catheter through an adjusting seat, a movable column and a limiting ball, the insertion speed of the catheter is adjusted, and the placement speed of the catheter is adjusted through the matching of three adjusting blocks, a shifting block, a limiting pin, an adjusting groove, a pin hole and the movable column. The catheter inserting speed is conveniently controlled, the placing stability is improved, the operation time is shortened, the adjusting frequency is reduced, the catheter is conveniently placed in, the second catheter cavity is matched with the probe and the miniature blade, the hematoma position is conveniently broken, suction is conducted through the negative pressure device, the hematoma position is conveniently and rapidly dredged, and blood vessels are prevented from being blocked by the hematoma.

The embodiment of the utility model provides a special-shaped medicine balloon dilatation catheter, and relates to the technical field of balloon catheters. The special-shaped drug balloon dilatation catheter comprises a catheter body and a drug balloon, the drug balloon is provided with a drug coating, the drug balloon is arranged on the catheter body, the drug balloon is provided with an annular anti-skid piece, and the annular anti-skid piece surrounds the axis of the drug balloon. Due to the fact that the medicine balloon is provided with the annular anti-skid piece, the friction force between the medicine balloon and the diseased region can be increased when the medicine balloon passes through the narrow portion, the slipping phenomenon of the medicine balloon is avoided, then the situation of expansion failure is avoided, the pressure intensity of contact between the medicine balloon and the diseased region can be increased at the seriously hardened portion, and the better expansion effect is achieved. Meanwhile, the surface of the drug balloon is coated with the lipophilic drug coating, after the drug balloon is expanded, the drug can be better released to the diseased region, and a more excellent treatment effect is achieved.

The application discloses an intracranial laser balloon dilatation catheter and an operation method thereof. The intracranial laser balloon dilatation catheter comprises a tube body, the tube body comprises an inner tube and an outer tube which are nested inside and outside, an elastic piece is welded at the distal end of the inner tube, the inner tube and the outer tube of the distal end tube body have a first radial gap, the inner tube and the outer tube of the proximal end tube body have a second radial gap, the first radial gap is smaller than the second radial gap, a balloon body, an optical fiber, a movable piece which is located in the radial gap of the inner tube and the outer tube and has a first position with at least a part located in the first radial gap and a second position with all located in the second radial gap, a control piece which controls the movable piece to switch from the first position to the second position, and a laser generating module which emits laser with a wavelength of 400-750 nm and a repair function. The intracranial laser balloon dilatation catheter can avoid intravascular restenosis, the flow rate is slow when the balloon body is inflated, the flow rate is fast when the fluid in the balloon body is released, and the safety and convenience of the operation are considered.

1. Name of the product in this design: Medical dilator catheter. 2. Purpose of this design: To retract and expand tissue during surgery to expose the surgical field. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1. 5. This product is made of transparent material.

A catheter (50) of a flexible endoscope (100). The catheter (50) includes a catheter body defined by a proximal end and a distal end. The proximal end is connectable to an umbilical portion (5) of a flexible endoscope (100) and the distal end defines a deflectable portion. The catheter body defines a first channel (1), a second channel (2) and a third channel (3). The first channel (1) accommodates at least one of the optical system and deflection means for deflecting the deflectable portion, and the second channel (2) and the third channel (3) are configured to expand when in operation. The catheter (50) comprises an actuating member (18) insertable into the second channel (2) of the catheter body. The actuation member (18) is operable to selectively expand the second channel (2). The second channel (2) is operable in a plurality of modes when expanded, and one of the plurality of modes of the second channel (2) is configured to allow a suction operation in the second channel (2).

The invention discloses a coronary medicine balloon dilatation catheter, and belongs to the technical field of medical instruments. In order to solve the problems that an existing drug balloon is high in blood flow blocking risk, large in drug loss and uneven in drug distribution, the balloon dilatation catheter comprises a catheter body, a dilatation balloon, a drug delivery catheter, a drug storage bin, a driving connecting rod, a connecting ring and a guiding head. The dosing catheter protrudes out of the periphery of the dilatation balloon at intervals, the flexible side wall of the medicine storage bin communicates with the liquid injection cavity channel, and the driving connecting rod drives the dosing catheter to rotationally apply medicine through spiral transmission; the catheter body is provided with an independent blood flow cavity channel and a blood inlet, and a gap formed by the catheter body and the administration catheter forms a double-channel blood flow path. The invention realizes the synergy of vasodilatation, accurate and uniform administration and continuous blood perfusion, reduces drug loss and non-targeted deposition, reduces myocardial ischemia complications and postoperative restenosis risk, is simple and convenient to operate, and is suitable for various coronary heart disease treatment scenes.

The invention belongs to the technical field of medical instruments, and particularly relates to a balloon dilatation catheter drug coating uniformity testing method and device.In the preset temperature environment, a balloon dilatation catheter is filled with liquid phase-change shaping filler, then the environment temperature is reduced to the testing temperature, and the uniformity of the balloon dilatation catheter drug coating is tested. According to the method, the phase change shaping filler is solidified and shaped in the balloon dilatation catheter, so that the solidified and shaped balloon dilatation catheter can be axially and / or radially cut at the test temperature to obtain a plurality of to-be-detected sample segments with regular shapes, and the area or length of each part of the to-be-detected sample segments can be conveniently calculated. Meanwhile, according to the type of the medicine attached to the balloon dilatation catheter, the content of the medicine on the sample segment to be detected is detected by utilizing a chemical analysis quantitative detection method, so that the measurement precision of the medicine content is effectively ensured; and evaluating the uniformity of the drug coating according to the area or length of each sample segment to be detected and the measured drug content.

The application belongs to the technical field of medical instruments, and particularly relates to a coronary artery papillary balloon dilatation catheter, which comprises a dilatation catheter body, a fixed ring fixedly connected to the dilatation catheter body, a balloon body connected to the fixed ring, a hole provided on the dilatation catheter body, a flow channel provided on the inner wall of the dilatation catheter body, a silica gel head fixedly connected to the other end of the dilatation catheter body, a stop block fixedly arranged in the silica gel head, a piston block movably arranged in the silica gel head, a connecting rod, a ring-shaped block fixedly connected to one end of the connecting rod, and an impact head fixedly connected to the side surface of the ring-shaped block. The coronary artery papillary balloon dilatation catheter is convenient for removing thrombus through the impact head, avoids the influence of thrombus on the dilatation effect of the blood vessel, makes gas flow into the silica gel head, drives the piston block to move, drives the ring-shaped block and the impact head to move through the connecting rod, and removes the thrombus after the impact head moves out of the silica gel head and contacts the thrombus, so that the dilatation treatment of the coronary artery of a patient is facilitated.

The invention relates to the technical field of tearable tube sheaths, in particular to a tearable shunt tube sheath for ventricular jugular vein shunt, which comprises a catheter sheath and a mounting base inserted into the upper end of the catheter sheath, the catheter sheath is detachably connected with the mounting base, and an expansion catheter is fixedly mounted at the upper end of the mounting base. A hemostasis valve is mounted at the lower end of the mounting base; mechanical locking and pressing force adjustment are conducted on the two tearable tubes through the connecting piece, the situation that a traditional tube sheath needs to be torn open is avoided by pulling the pulling-out unit, the connecting piece is stably and linearly pulled out as a whole, and in the process, instant traction force and vibration generated due to material tearing and buckle separation when a sheath tube is torn in a traditional mode are completely avoided; the risk of tiny displacement of the tip of the accurately positioned shunt tube caused by sheath tube removal operation is eliminated, the shunt tube is always stabilized at the optimal position in the middle of the right atrium, and the operation success rate is increased.

This invention discloses an intraperitoneal balloon-assisted pacing implant kit, comprising: a guiding component, a dilation catheter component, and an inflation / deflation component. The guiding component includes a first guidewire, a portion of which is located inside the pericardial cavity of the target heart. The dilation catheter component includes a main tube and a balloon. The main tube has parallel guiding and air intake channels. The first guidewire is slidably connected within the guiding channels, guiding the main tube into the body. The balloon is positioned on the main tube and connected to the air intake channel. The main tube has a groove along its axial direction. Guided by the first guidewire, the balloon is embedded in the pericardial cavity of the target heart. Air is introduced through the air intake channel, causing the balloon to extend along the groove and surround the outside of the ventricle. The inflation / deflation component is connected to the balloon. With the support of ECG gating technology, the balloon expands during cardiac systole and contracts during diastole within the pericardial cavity, thereby compressing the left and right ventricles during cardiac systole.

A catheter comprising: a shaft configured for insertion into a body of a subject; an expandable assembly mounted at a distal end of the shaft and comprising a proximal end, a distal end, and a longitudinal axis extending between the proximal and distal ends; a coil-spring assembly extending between the proximal end and the distal end of the expandable assembly, along the longitudinal axis; the coil spring assembly comprising at least two nested coil springs which define an inner passageway for an elongate element to be passed therethrough; the coil-spring assembly being configured to deflect along with the expandable assembly while the inner passageway is maintained open.

The invention relates to a replacement-free dilating catheter with a multifunctional bin, and relates to the technical field of medical instruments. Comprising a working bin, an expansion assembly and a filling assembly. The dilation assemblies are used for entering blood vessels to dilate lesion positions, the multiple dilation assemblies are arranged in the working bin in a sliding mode, and the dilation sizes of the dilation assemblies are different; the filling assembly is arranged on the working bin and used for being communicated with each expansion assembly and expanding the expansion assemblies. In the whole expansion process, the guide wire is not separated from the lesion far end in the whole process, the displacement risk is completely eradicated, and absolute reliability of an operation path is ensured; the dilation assembly does not need to replace the catheter and is switched only through the pushing piece, and the operation time is greatly shortened.

The invention relates to the technical field of dilatation catheters, in particular to a perfusion balloon dilatation catheter system which comprises a perfusion balloon dilatation catheter assembly which comprises a catheter seat, a destressing tube, an outer tube, a balloon and a head end tube which are sequentially connected. The catheter front-end blood vessel image acquisition module is used for determining whether the balloon catheter is in a blood vessel true cavity or not; the supporting wire front end image acquisition module is used for acquiring a supporting wire form image of the front end of the supporting wire under X-ray perspective and a corresponding blood vessel form image; the supporting wire touch obtaining module is used for obtaining stress changes in the supporting wire pushing process, the supporting wire form image and the corresponding blood vessel form image so as to determine whether the supporting force of the supporting wire is qualified or not, and the posture of the supporting wire is adjusted in the state that the supporting force of the supporting wire is insufficient. The perfusion balloon dilatation catheter system has the balloon dilatation function and the radiography function at the same time, and by means of the image and data processing technology, the intelligent level of medical instruments is improved.