136 results about "Guiding catheter" patented technology

A system for delivering a fluid to a target site of a patient's vasculature having a catheter having a proximal end, a distal end, and a lumen defined by an interior surface of the catheter extending longitudinally through the catheter between the proximal end and the distal end, a guiding element having a distal end, a proximal end, and an exterior surface, the guiding element positioned in the lumen creating an area, between the exterior surface of the guiding element and the interior surface of the catheter, having an effective cross-sectional area sized fluid communication while the guiding element is in the lumen. Also, a method of performing a neurovascular procedure includes providing a multi-catheter assembly including an access catheter, a guide catheter, and a procedure catheter, coupling the assembly to a robotic drive system, and injecting contrast media into the assembly without removing a guiding element.

The guiding catheter comprises a handle and a hollow catheter body, and the catheter body comprises an extension section and a bent section; the bent section is subjected to pre-shaping treatment and comprises a balloon, a first arc-shaped fixed bent part, a second arc-shaped fixed bent part and a third arc-shaped fixed bent part, and the first fixed bent part, the second fixed bent part, the balloon and the third fixed bent part are sequentially connected from the near end to the far end; the bending direction of the second fixed bending part is opposite to the bending direction of the first fixed bending part and the bending direction of the third fixed bending part; the chord lengths of the first fixed bending part, the second fixed bending part and the third fixed bending part are sequentially reduced, and the bending radius of the first fixed bending part and the bending radius of the third fixed bending part are both larger than the bending radius of the second fixed bending part. The functions of guiding and blocking the coronary sinus ostium can be achieved through the hollow tube body and the balloon, the bent section can enable the bent shape of the bent section to be matched with a target part, the operation difficulty of a doctor is reduced as much as possible, and the doctor can conduct surgical operation conveniently.

The invention provides a catheter capable of being easily placed in a deep target position in a body. The catheter comprises a guiding catheter, a working catheter and an inflatable balloon located between the working catheter and the guiding catheter. The inflatable and deflatable balloon is of a double-layer structure, the inflatable and deflatable balloon is further connected with a medium tube, and when the inflatable and deflatable balloon is filled with a medium, the guide catheter is connected with the working catheter through the inflatable and deflatable balloon; the outer end of the medium pipe is connected with a medium pump; a detection device is arranged at the in-vivo end of the guide catheter and is connected with an in-vitro detection equipment host through a signal transmission line; the working catheter or the guiding catheter is further provided with a catheter head end direction adjusting structure. According to the technical scheme, linkage of the guiding catheter and the working catheter can be achieved through the inflatable balloon, and therefore the working catheter can be conveniently conveyed to the preset position under the guidance of the detection device and the assistance of the catheter head end direction adjusting structure, and the working efficiency is greatly improved.

A guide extension catheter positionable within a guide catheter and configured to receive an interventional device for insertion into a vasculature is disclosed. The guide extension catheter can include a push member and a radially collapsible, tubular membrane in contact with the push member. The guide extension catheter may include a reinforcement member or proximal end cap positioned at the proximal end of the tube member and formed as a rigid, non-collapsible structure. The guide extension catheter may be delivered through another catheter, such as a guide catheter, in a compressed configuration, and then released to an expanded, non-compressed configuration when the guide extension catheter has been partially extended beyond a distal end of the guide catheter.

A deflectable guiding catheter that includes a proximal handle assembly, an elongated catheter shaft extending distally from the proximal handle assembly and including a deflectable distal end portion, a drive mechanism within the proximal handle assembly for steering the deflectable distal end portion of the catheter shaft, an anchor ring positioned adjacent a distal end of the catheter shaft, an elongated pull wire extending from the drive mechanism and connected to the anchor ring, a braided sleeve extending from a proximal end of the catheter shaft to a proximal end of the anchor ring, and a containment ring positioned over a distal end portion of the braided sleeve at the proximal end of the anchor ring.

A method, apparatus and computer program product, the method comprising: obtaining electrical information from a plurality of electrodes disposed on a distal end assembly of a catheter within a heart of a patient as the catheter is being maneuvered within the heart; dynamically identifying a portion of the distal end assembly that is displaced from tissue wall of the heart, based upon the electrical information received from the plurality of electrodes; generating a visual representation of the distal end assembly; dynamically distorting the visual representation by warping (the identified portion of the distal end assembly; and rendering the visual representation as dynamically distorted to the display device.

Medical delivery system for accessing a tricuspid valve via an inferior vena cava, including an outer guide catheter, an inner guide catheter and an interventional catheter. The first deflection portion of the outer guide catheter is steerable to define a first outer-guide-catheter curve and the second deflection portion of the outer guide catheter is steerable to define a second outer-guide-catheter curve and the first deflection portion of the inner guide catheter is steerable to define a first inner-guide-catheter curve.

A balloon catheter is described with features to reduce balloon stickiness thereby ensuring a more even inflation profile. In some embodiments, a balloon guide catheter is described which includes a conduit or passage for additional catheters or devices.

The invention provides a guide catheter as well as a preparation method and application thereof, and the guide catheter comprises the following components in parts by weight: 100 parts of a matrix material; 5 to 10 parts of tripropyl citrate; 1 to 5 parts of polycaprolactone glycol; 5 to 10 parts of 1, 4-butanediol sulfate; 0.5 to 3 parts of a coupling agent; and 0.1-0.5% of an antioxidant. According to the guide catheter, the flexibility and lubricity of the base body are cooperatively regulated and controlled through all the materials, the rebound recovery rate of the catheter is increased, the deformation recovery capacity of the catheter when the catheter passes through a narrow or bent part of a blood vessel is greatly improved, creases or permanent bending is effectively avoided, and the controllability and safety in the pushing process are improved.

The present invention discloses a biopsy forceps guiding catheter that can be used for zero-ray myocardial biopsy, comprising a catheter body, wherein a central cavity penetrating through both axial ends of the catheter body is provided inside the catheter body, at least one electrode element is provided at the first axial end of the catheter body, an airbag component is provided at the first axial end of the catheter body near the rear side of the electrode element, the electrode element is connected to an electrical connection assembly extending to the second axial end of the catheter body, the electrical connection assembly is connected to an electrocardiogram monitor, and the airbag component is connected to a ventilation assembly extending to the second axial end of the catheter body. The electrocardiogram and injury current in the cardiac cavity are recorded by the electrocardiogram monitor leads to select a site with a significant injury current for sampling, thereby reducing the influence of scars and fat tissue on the quality of the sampled sample, and the airbag component can drift and move with the blood, thereby solving the problem that the current biopsy forceps need to rely on X-ray guidance to be delivered into the ventricle and it is difficult to accurately obtain a specific layer of myocardium under the endocardium during sampling.

Method and system for generating predicted trajectories for navigating a catheter through a lumen, the system including: a steerable catheter including a proximal end, a distal end, a catheter tip, and a tool channel extending from the proximal end to the distal end; an imaging device disposed within the steerable catheter; a console including a system controller, a display controller, and a display; and a navigation module configured to: receive preoperative data and multiple consecutive images from the imaging device from the system controller, and output information based on the received preoperative data and the multiple consecutive images, the information including at least one of: a location, a direction, or a recommended trajectory for navigating the catheter through the lumen.

The utility model discloses a balloon pressure holds frock of guide catheter belongs to pressure holds frock technical field, include: base and control panel, bearing plate is set up in base upper end one side, control panel sets up in base upper end other side, bearing plate upper end one side is equipped with pressure holds subassembly, the utility model discloses, through setting up in the second electric push -rod of spacing plate, can drive first piston plate to remove when its start, further change piston cavity and the pressure in two air chambers that are connected with it, and pressure variation will drive two clamping plates to remove respectively, thereby can conveniently and stably limit the position of guide catheter and balloon, cooperate the first electric push -rod of mounting seat bottom end one side, can stably drive guide catheter and balloon to remove, in the assembly process of guide catheter and balloon, can guarantee assembly quality, can improve assembly efficiency, make the balloon pressure holds equipment of guide catheter in practicality aspect obtains the remarkable promotion.

This application relates to the field of medical device technology and provides an occlusion device. The occlusion device includes a catheter body, an occlusion component, and a multidimensional contact guide. When the multidimensional contact guide enters a vascular dissection or a non-target vessel, the sidewall of the multidimensional contact guide of the occlusion device can form an annular contact area or at least two sub-contact areas with the inner wall of the vessel, thereby encountering resistance and preventing the catheter from being further advanced. This avoids vascular damage caused by the occlusion component filling in branches or non-target vessels. The multidimensional contact guide is used to guide the movement of the catheter body and buffer the elastic deformation force of the distal end of the catheter body when the occlusion component is depressurized. The occlusion device provided by this application can guide the occlusion component into the target occlusion area, avoiding entry into vascular dissection or non-target vessels; and buffer the elastic deformation force of the distal end of the catheter body when the occlusion component is depressurized, preventing the distal end of the occlusion device from puncturing the vessel.

This invention relates to a device and method for aspirating hemorrhage from the stomach. The device includes a guide tube with an axially arranged suction chamber and an auxiliary chamber. One end of the suction chamber is fitted with a plug that communicates with it. The plug has several microporous rings penetrating its inner and outer circumference. The other end of the suction chamber is connected to a negative pressure unit. The auxiliary chamber is axially arranged on the wall of the suction chamber. One end of the auxiliary chamber extends into the end of the suction chamber and is connected to an impedance sensor. The other end is connected to an auxiliary flushing unit. The negative pressure unit and the auxiliary flushing unit are also electrically connected to a control module. The control module is electrically connected to the impedance sensor and the microporous rings and is used to trigger pulsed expansion of the microporous rings based on the impedance signal from the impedance sensor. Through pulsed expansion of the microporous rings, combined with reverse flushing by the auxiliary flushing unit, the device of this invention can achieve dual unblocking through both expansion and flushing, improving operational continuity.

The utility model relates to the technical field of medical instruments, in particular to a guide catheter assembly which comprises a plurality of layers of sleeve parts, the sleeve parts are thinned step by step from the first step to the Nth step and are sequentially nested, each sleeve part comprises a catheter body, the near end of each catheter body is provided with an operation handle used for controlling the corresponding sleeve part, and the operation handle is connected with the corresponding sleeve part. The far end of the catheter body is in a bent shape relative to the catheter body, and the far end of the catheter body from the first step to the Nth step has the same or different preset curvatures; and the interventional instrument can penetrate through the Nth-step sleeve piece so as to reach the target far-end blood vessel under the guidance of the multi-layer sleeve piece. According to the scheme, the defects that in the prior art, due to the fact that a guiding catheter is not matched with a pulmonary artery anatomical structure, the operation difficulty is large, time is long, and radiation exposure is large are overcome, and an interventional access is rapidly built in interventional therapy with complex and bent blood vessels.

Medical delivery system for accessing a tricuspid valve via an inferior vena cava, including an outer guide catheter, an inner guide catheter and an interventional catheter. The first deflection portion of the outer guide catheter is steerable to define a first outer- guide-catheter curve and the second deflection portion of the outer guide catheter is steerable to define a second outer-guide-catheter curve and the first deflection portion of the inner guide catheter is steerable to define a first inner-guide-catheter curve.

The utility model discloses a disposable forward guide tube for retrograde tracheal intubation, which belongs to the technical field of medical instruments and comprises a tube body, a guide joint, an air outlet and a jet vent hole, the guide joint is arranged at one end of the tube body, and the jet vent hole is connected to the top of the guide joint. A guide wire for retrograde tracheal intubation is inserted into the tube body and the guide joint, and an air outlet is formed in the outer surface of one end, far away from the guide joint, of the tube body. The guide tube has the advantages that when retrograde tracheal intubation is carried out through the guide tube, the guide wire can enter from the guide connector on the guide tube, so that the guide wire can smoothly pass through the tip end, the guide wire is convenient to pull, meanwhile, the guide tube is connected with an oxygen supply source through the jet vent hole, and the oxygen supply effect is good. And continuous oxygen supply can be achieved in the retrograde intubation process, the occurrence rate of oxyhemoglobin saturation is reduced, and the practicability of the guiding catheter is further improved.

The present invention provides a guide catheter, a preparation method, and applications thereof. The guide catheter comprises the following components, measured by weight: 100 parts of a base material; 5-10 parts of tripropyl citrate; 1-5 parts of polycaprolactone diol; 5-10 parts of 1,4-butanediol sulfate; 0.5-3 parts of a coupling agent; and 0.1-0.5 parts of an antioxidant. The guide catheter of the present invention utilizes the synergistic effects of various materials to regulate the flexibility and lubricity of the base material, thereby improving the catheter's rebound recovery rate and significantly enhancing its ability to recover from deformation when navigating narrow or curved blood vessels. This effectively prevents creases or permanent bends, and enhances maneuverability and safety during delivery.

A kit for storing a preformed stent includes a stent delivery system, a preformed stent and a flexible member. The stent delivery system includes a pushing catheter, and guiding catheter. The preformed stent has two configurations, a first configuration that has a non-linear shape and a second configuration that has a linear shape. The flexible member is also transformable from a first configuration that has a non-linear shape to a second configuration that has a linear shape. The flexible member and the preformed stent are in the first configuration when stored in the kit.

The present invention is titled "Adhesive-Free Bonded Balloon for Balloon Guide Catheter with Minimum Outer Profile". The present invention provides a balloon guide catheter having a catheter shaft and a balloon, the catheter shaft having an outer layer made of a refluxable material, the balloon having a bonding interface region with a plurality of perforations defined therein, the balloon being fixed around the outer layer by the refluxable material of the outer layer of the catheter shaft penetrating into the plurality of perforations to form a radially outward reflux bond between the catheter shaft and the balloon without using an adhesive. One or more reflux sheaths made of a refluxable material may also be disposed around the bonding interface region of the balloon and penetrate into the plurality of perforations to form a radially inward reflux bond.

The present invention relates to a blood pump (10) comprising a steering catheter (12) and a pump segment (14). The pump segment (14) is configured to be placed inside a human body and comprises an expandable and collapsible pump housing (20), an expandable and collapsible pump element (22) arranged within the pump housing (20), and an electric motor (32) configured to rotate the pump element (22). The steering catheter (12) comprises a distal end (16) and a proximal end (18), wherein the pump segment (14) is coupled to the distal end (16) of the steering catheter (12). The steering catheter (12) further comprises an elongated body (60) extending along a central axis between the distal end (16) and the proximal end (18), a working channel (64) extending at least partially within the body (60) from the proximal end (18) of the steering catheter (12) in a direction of the distal end (16) of the steering catheter (12), the working channel (64) being configured to removably receive a guide catheter (78).

A balloon guide catheter having a sleeved inflation lumen secured with a wire wrap for improved inflation lumen kink protection and a welded balloon construction provides a robust and flexible catheter with an exceptionally large inner lumen relative to its outer profile and enables rapid and reliable balloon inflation and deflation in a highly deliverable and kink resistant catheter. Balloon guide catheters having multiple sleeved inflation lumens and proximal luers for utilizing the multiple inflation lumens are also provided.

The invention discloses a kiss microcatheter and a reverse microcatheter and forward guide wire exchange system. The kiss microcatheter comprises a catheter body, an umbrella-shaped mesh enclosure and a sleeve device. The umbrella-shaped mesh enclosure is fixed at the head end of the tube body; the umbrella-shaped mesh enclosure has a natural unfolding state and a folding state; the umbrella-shaped net cover is in an opened umbrella-shaped structure with an opening in the middle in a natural unfolding state, the large opening end of the umbrella-shaped structure is attached to the inner wall of the guiding catheter, and the small opening end of the umbrella-shaped structure is connected to the head end of the catheter body; the sleeve device is slidably connected to the catheter body, and the outer diameter of the sleeve device is smaller than the inner diameter of an external guiding catheter. The length of the sleeve device is greater than that of the umbrella-shaped mesh enclosure; when the umbrella-shaped mesh enclosure slides into the sleeve device, the umbrella-shaped mesh enclosure is in a storage state; when the umbrella-shaped net cover slides out of the sleeve device, the umbrella-shaped net cover is in a natural unfolding state. The operation that the forward guide wire enters the reverse microcatheter is simplified, and the success rate of guide wire exchange is increased; the purpose of improving the success rate and efficiency of reverse opening of CTO lesion is achieved.

The utility model discloses a multifunctional fishhook catheter for neuroangiography, which relates to the technical field of medical instruments and comprises an angiography catheter, the angiography catheter is integrally formed into a catheter main body and a fishhook end, and the catheter main body and the fishhook end are sequentially composed of an outer rubber layer, a steel frame and an inner rubber layer from outside to inside. The steel frame is composed of a plurality of elastic steel bars, a plastic steel ring and a central steel ring. According to the multifunctional fishhook catheter for neuroangiography, by means of the fishhook end formed at the end of the angiography catheter, the multifunctional fishhook catheter can adapt to the bent structure of the end of the neuroangiography and is convenient to use, meanwhile, by additionally arranging the steel frame, especially by means of the thickening and reinforcing design of the center steel ring, bent forming of the fishhook end can be reinforced, and the service life of the fishhook catheter is prolonged. In addition, the angiographic catheter can be supported through the cooperation of the elastic steel bar and the plastic steel ring, and the situation that the angiographic catheter sinks and deforms in the process of penetrating into the blood vessel, and consequently a subsequent guiding catheter and a contrast agent are difficult to introduce is avoided.

The utility model relates to the technical field of medical instruments, and provides an intervention guiding catheter and an intervention system.The intervention guiding catheter comprises a catheter body, a switch assembly and a traction piece; a side hole is formed in the catheter body and penetrates from the outer wall of the catheter body to the inner wall of the catheter body; the switch assembly comprises a switch piece, and the switch piece is arranged on the catheter body; the traction piece is connected with the switch piece, and the traction piece is used for pulling at least one part of the switch piece to move relative to the catheter body so as to open or close the side hole. According to the intervention guiding catheter, the side hole is provided with the switch for controlling the side hole to be opened or closed, by controlling the switch of the side hole, the side hole of the intervention guiding catheter with the side hole is opened when needed, and blood perfusion of a target blood vessel is provided for a target object; when the side hole is not needed, the side hole is closed, the usage amount of the contrast agent is reduced, and meanwhile the supporting force of the side hole specification interventional guiding catheter is improved.

A guiding catheter includes an outer shaft defining a first guiding lumen in an interior of the outer shaft. An inner shaft is movably arranged at least partially in the first guiding lumen. The inner shaft defines a second guiding lumen in an interior of the inner shaft. A dividing device is arranged at a proximal end region of the guiding catheter. The dividing device includes a first port, and a second port angularly arranged with respect to each other. Both the first port and the second port provide access to the first guiding lumen. The inner shaft extends through the second port into the first guiding lumen. The inner shaft includes at least a section-wise slit along a longitudinal extension direction (F) of the inner shaft. The slit provides access to the second guiding lumen and enables a working catheter to enter the second guiding lumen from the first guiding lumen. The inner shaft has a length exceeding a length of the outer shaft.

To provide a balloon catheter capable of achieving both of improvement in pull-in property to a guiding catheter and excellent expansion accuracy when the diameter of a balloon is expanded.SOLUTION: A balloon 140 includes a straight portion 141 and a tapered portion 142 inclined from the straight portion 141 toward a connecting portion with a shaft 110, having the same diameters along the axial direction. An outer diameter of the straight portion 141 at the time of NP dilation is greater than 4 mm and equal to or less than 6 mm. A taper length D1 which is an axial length of the tapered portion 142 is 4-6 mm. A ratio of the taper length D1 to a distance D2 (farthest end portion distance D2) from a central axis C of the shaft 110 to a farthest end portion of the balloon 140 when the balloon 140 deflated in a state where a plurality of blade portions 150 are formed in the straight portion 141 and the tapered portion 142 in the circumferential direction is viewed in the axial direction is 2-4.SELECTED DRAWING: Figure 5

The invention provides a method for detecting pressure in an intracranial aneurysm cavity, and belongs to the technical field of pressure detection in an aneurysm cavity. The detection method comprises the following steps: S1, planning an implantation path, positioning an aneurysm focus position under the guidance of image equipment before an operation, and planning the implantation path of a pressure monitoring system; s2, a pressure monitoring system is implanted, a guide catheter is intervened through femoral artery puncture, and the pressure monitoring system is sent to a target blood vessel section; s3, data are collected, and pressure values in the aneurysm cavity and the aneurysm neck opening are collected before the operation, during the operation and after the operation respectively; s4, data analysis: analyzing the collected data so as to respectively determine changes of pressure values in the aneurysm cavity and the aneurysm neck opening before, during and after an operation; the method is mainly used for solving the technical problems that in the prior art, real-time monitoring means for the pressure of an aneurysm cavity is lacked, and the force change in the aneurysm cavity cannot be accurately measured.

The embodiment of the application provides a guide catheter, an ablation system and an ablation end point judgment method, and belongs to the technical field of ablation. The guide catheter comprises an outer tube, a radially contractible head end support and a first electrode. The radially contractible head end support comprises a plurality of support arms. The plurality of support arms are distributed in a circumferential direction of the head end support. One end of the plurality of support arms is connected to a distal end of the outer tube. The other end of the plurality of support arms is a free end. The first electrode is arranged on the support arm. The support arm is bent outward. The first electrode is attached to a blood vessel wall by the resilience of the support arm. When the head end support is in a contracted state, the extension directions of the support arms are parallel to each other. The guide catheter can improve ablation accuracy and reduce the risk of insufficient ablation or excessive ablation.

Disclosed are a device and a method of autonomous stone ablation during laser lithotripsy, the method including inserting a catheter into a lumen; navigating the catheter through the lumen along an insertion trajectory; obtaining at least one image of an object within the lumen; segmenting the at least one image; determining a size of the object; and in response to the size exceeding or being equal to a predetermined size: defining a region of lasing of the object, aligning a tip of the catheter with the region of lasing, and performing lithotripsy.