79 results about "Guiding catheter" patented technology

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.

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.

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 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).

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.

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 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.

The application relates to the technical field of medical devices, and particularly discloses a spring coil conveying device. The spring coil conveying device comprises a conveying unit, a spring coil unit and a lead-in sheath unit, the proximal end of the spring coil unit is detachably connected with the distal end of the conveying unit; the distal end of the lead-in sheath tube is provided with a first taper tube, the tube diameter of the first taper tube gradually decreases from the proximal end to the distal end, the small-end of the first taper tube is convenient for being connected with a guide catheter, the large-end of the first catheter is connected with the lead-in sheath tube, the tube diameter of the lead-in sheath tube is slightly larger, the friction between the spring coil unit and the lead-in sheath tube is reduced, and then the spring coil unit is not easy to deform or break in the pushing process; the distal end of the lead-in sheath tube is provided with the first taper tube, the adaptability of the lead-in sheath tube and the guide catheter is improved, the conveying unit and the spring coil unit can be effectively connected in the process of entering the guide catheter, and the problem that the two cannot be pushed due to early separation is avoided.

The invention relates to the technical field of medical auxiliary equipment, and discloses an urgent and severe surgery trachea cannula positioning device convenient to adjust, the urgent and severe surgery trachea cannula positioning device comprises a fitting mask, a tracheal catheter for performing trachea cannula treatment on an urgent and severe patient is arranged in the fitting mask, and one end of the tracheal catheter penetrates through the corresponding position of the fitting mask and extends outwards. By adding and arranging the trachea positioning mechanism, the mechanism can position the bottom of the tracheal catheter through the guide cavity of the lower positioning tube and the central seat of the seaming ring seat, fix the bottom by virtue of oral occlusion of a patient and prevent the lower end of the catheter from deviating, and a rubber layer in the upper positioning tube can guide and fix the upper part of the catheter; by matching with the elastic rubber diaphragm between the annular seat and the positioning ring seat, when the catheter deviates, the elastic force difference generated by elastic deformation can be used for guiding the catheter to automatically reset the center, so that the upper and lower dual positioning of the catheter is realized, the ventilation effect is prevented from being influenced by deviation, and the safety and reliability of intubation treatment are improved.

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.

A guiding catheter system for performing intramyocardial ablation is provided. In one example, a guiding catheter system for intramyocardial navigation and ablation includes an accessor catheter including a shaft, the shaft including one or more lumens, the one or more lumens sized to accommodate an effector configured to perform intramyocardial navigation and an anchor system.

Described herein is a guide catheter, including: a catheter tube having a catheter lumen, a first opening, and a second opening; and a balloon surrounding the catheter tube. In the guide catheter, the length of the section of the catheter tube between the balloon and the second opening ranges from about 8 cm to about 25 cm. Also described herein are methods of using the guide catheter.

This utility model discloses a novel sheath, relating to the field of medical device technology. It includes an inner and outer tube body and a sheath. The tube body comprises an inner tube, a reinforcing layer, and an outer tube, sequentially arranged from the inside out. The outer tube includes multiple transition segments connected in series. From the distal end to the proximal end of the tube body, the hardness of the multiple transition segments increases sequentially. Each transition segment has a fusion-fitting portion at its end, where the fusion-fitting portions of any two adjacent transition segments interlock to form a transition zone. By providing fusion-fitting portions at the ends of the transition segments, any two adjacent transition segments can be fused together through the fusion-fitting portions, thereby balancing support and flexibility, ensuring smooth pushing of the sheath, and providing sufficient support to guide catheters or other vascular devices to the lesion area.

An elongate steerable device for guiding a catheter or endoscope includes an elongate flexible member extending along a longitudinal axis, the flexible member having a proximal end and a distal end, at least one shape memory alloy wire presenting at least one activatable region and secured to the distal end of the elongate flexible member, an actuator configured to actuate the at least one shape memory alloy wire, and an actuator configured to actuate the at least one shape memory alloy wire. And at least one shape memory alloy wire configured to activate the at least one shape memory alloy wire from a proximal end of the elongate flexible member, where an activatable region of the at least one shape memory alloy wire is configured to assume a dormant configuration and an activated configuration, where the activated configuration assumes at least one predetermined curvature, where the at least one shape memory alloy wire is configured to assume a dormant configuration. The activatable region of the at least one shape memory alloy wire is configured to assume the activated configuration when activated by the actuator to direct the distal end of the elongate flexible member to have a predetermined curvature.

The invention discloses a balloon catheter and a balloon catheter assembly, and belongs to the field of balloon catheters. Comprising a catheter, a connecting pipe and a working pipe, the working pipe penetrates through the catheter, the catheter is sleeved with a balloon, a plurality of protruding pieces are evenly arranged around the periphery of the balloon, a channel pipe is arranged at the bottom end of the catheter, a plurality of extending ends of the connecting pipe are communicated with the corresponding protruding pieces respectively, and the circumferential end of the connecting pipe is communicated with the channel pipe. The anchoring function is built in the guiding catheter, and the tedious step that a guide wire and a balloon catheter are additionally conveyed into a branch blood vessel for anchoring is omitted. And an operator can establish stable support only by operating a single instrument, so that the operation time is remarkably shortened, and the exposure time of the operator and a patient under X rays is shortened. After anchoring is achieved, an operator can immediately conduct follow-up operation through the central working cavity, seamless connection from establishment of support to lesion passing is achieved, and the operation fluency is greatly improved.

A single-lumen balloon guide catheter is provided. A balloon catheter includes a tubular body and a balloon circumferentially surrounding a portion of the tubular body. The tubular body includes an outer surface and an inner surface defining an inner lumen of the tubular body. The balloon includes a proximal portion, a distal portion, and an expandable portion, each of the proximal portion and the distal portion being secured to the tubular body, the expandable portion defining an interior in fluid communication with the inner lumen of the tubular body. The distal portion of the balloon extends through the outer surface and the inner surface into the inner lumen of the tubular body, forming a sealed portion circumferentially surrounding the inner surface of the tubular body. A catheter assembly including the balloon catheter and a method of use are also provided.

The present invention is entitled "Focused Ablation Catheter Combined with a Guidewire Inserted Through a Flushing Channel". The present invention provides a catheter comprising an ablation electrode and a flushing channel. The ablation electrode is configured to ablate tissue of a patient organ and is fitted onto an insertion cannula for insertion into the patient organ. The flushing channel comprises: (i) a lumen formed along the axis of the insertion cannula and configured to allow flushing fluid to flow to the ablation electrode, and (ii) one or more flushing orifices formed in the ablation electrode and configured to apply flushing fluid to the organ. The flushing channel is configured to simultaneously (i) receive a guidewire for guiding the catheter and (ii) allow flushing fluid to flow.

Improved systems including rBGCs improved by means of stiffness; working zones and optimized transition zones can traverse the aortic arch into the common carotid and vertebral arteries from a radial approach including navigation of tortuous and individuated anatomical challenges. Mechanical Thrombectomy improved by balloon occlusion prevents thrombus showers and follows 10 years of interventional cardiology and diagnostic use of improved radial approach (TRA) with better systems, making trans-femoral (TFA)less safe and effective than this revised treatment paradigm, unexpectedly better than literature predicted in early parts of the decade. Likewise, carotid stenting may be performed during these intracranial arterial occlusion procedures without swapping out guide catheters as required by the prior art.

Systems and methods for navigating a catheter in a patient using a robotic navigation system with risk management are provided. An input medical image of a patient is received. A trajectory for navigating a catheter from a current position to a target position in the patient is determined based on the input medical image using a trained segmentation network. One or more actions of a robotic navigation system for navigating the catheter from the current position towards the target position and a confidence level associated with the one or more actions are determined by a trained AI (artificial intelligence) agent and based on the generated trajectory and a current view of the catheter. In response to the confidence level satisfying a threshold, the one or more actions are evaluated based on a view of the catheter when navigated according to the one or more actions. The catheter is navigated from the current position towards the target position using the robotic navigation system according to the one or more actions based on the evaluation.

The utility model relates to a guiding catheter which comprises a catheter base. The injection tube is connected with the tube seat, and the tube diameter of one end, far away from the tube seat, of the injection tube is adjustable; the metal filament is arranged in the injection tube along the axial direction of the injection tube, and one end of the metal filament is connected with the tube seat; the extension tube is connected with the injection tube, and the injection tube penetrates into a tube body of the extension tube; the anchoring part is arranged on the extension pipe and can be used for anchoring the extension pipe; when the anchoring part is in a contracted state, the medical instrument can penetrate through the interior of the extension pipe through the anchoring part. When the anchoring part is in the full state, the anchoring part expands in the radial direction of the extension pipe and abuts against the anchoring position so as to anchor the extension pipe. According to the guiding catheter provided by the invention, the guiding catheter can be directly anchored in the guiding catheter, so that the guiding catheter is prevented from displacing.

The application relates to a cryoablation catheter and device, the cryoablation catheter comprising a smoothing mechanism, the smoothing mechanism comprising at least one pressing plate, the pressing plate being slidably arranged at the distal end of a catheter body along the axial direction of the catheter body, wherein, in response to the switching of a balloon from a contracted state to a filled state, the pressing plate is expanded along the radial direction of the catheter body and moves along the catheter body from the distal end to the proximal end, and in response to the switching of the balloon from the filled state to the contracted state, the pressing plate is contracted along the radial direction of the catheter body and moves along the catheter body from the proximal end to the distal end while keeping abutting to the outer wall of the balloon. The cryoablation catheter provided by the application can smooth the bulges / folds on the surface of the balloon when the balloon is switched from the filled state to the contracted state, prevent the occurrence of adverse phenomena such as bulges / folds on the surface of the contracted balloon, keep the size of the balloon as a smaller value, and smoothly retract the balloon into the guide catheter, so that the cryoablation catheter is conveniently withdrawn to the outside of the patient.

The utility model relates to the technical field of medical instrument manufacturing equipment, in particular to a tool for bonding a balloon to a balloon guide catheter, which comprises a guide tube and a balloon, and a plurality of air holes are formed in the circumferential side wall of the guide tube; the upper end face of the positioning bottom frame is of a semicircular structure; the balloon positioning assembly comprises two sets of lifting sliding rods fixedly connected to the upper end face of the positioning bottom frame. According to the balloon guiding catheter, the balloon and the guiding catheter can be precisely positioned on the two sides, the stability degree and the bonding precision of the balloon in the subsequent bonding process are guaranteed, the using performance of the balloon guiding catheter is guaranteed, the balloon flanging and the guiding catheter can be separated, an operator can conveniently and rapidly reset the balloon flanging, and the balloon guiding catheter is convenient to use. The operation efficiency of turning and resetting of the balloon is improved, the coated glue is prevented from being solidified, and the bonding effect of the balloon and the guide tube is ensured.

A probe for insertion into an endotracheal tube to guide the tube during intubation is disclosed. The probe has a body (3) with a pivotable tip portion (5) at its distal end, which tip portion is movable in either of two opposite directions away from the axis of the probe. The tip portion (5) can carry an image capture device for video imaging. A control mechanism for controlling the pivot angle of the pivotable tip has a manual actuator (7) at the proximal end of the probe and a flexible control line (23) extending down to the probe to connect the actuator to the pivotable tip portion (5). An endotracheal tube (100) usable with the probe is also disclosed, the endotracheal tube having a curved portion (103) at its distal end, the curved portion being defined by a bellows-like or thinned portion to facilitate bending of the tip portion (104) of the endotracheal tube by the probe tip portion (5).

A catheter assembly (1) comprising a handle (100), a guide catheter (10) with a proximal end arranged in the handle, and a delivery catheter (20) arranged in the guide catheter and extending from the proximal end thereof. The handle comprises a housing (110, 120) and a combined control member (300) axially and rotatable attached to the housing, the combined control member having a first axial position in which the delivery catheter is axially locked relative to the housing and in which rotational movement of the combined control member causes rotational movement of the fluid delivery catheter, and a second axial position in which the fluid delivery catheter is axially free relative to the housing and thus the guide catheter.