181 results about "Guiding catheter" patented technology

The invention is a delivery catheter, e.g., a guide catheter, having an imaging element in proximity to the distal end of the catheter. Catheters of the invention are able to placement of the catheter in proximity to an ostium, thereby increasing the efficiency of contrast delivery while reducing the risk of ischemia due to blocked blood supply. The invention additionally assists in maintaining catheter position during delivery of a fluid from the catheter, resulting in better performance with less fluid. For example, a catheter of the invention can be used to produce improved fluoroscopic images with less overall contrast. This improvement reduces the risk of an allergic reaction to the contrast while decreasing the length of time for a procedure, i.e., because of a need to re-contrast.

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.

A catheter body control system is provided that includes a first and a second robotic module and a manipulator device. The first robotic module is configured to couple with a guide catheter manipulator device to control advancement or angulation of the guide catheter within a heart chamber or to couple with a first control dial of a handle of a TEE probe to control advancement or angulation of a flexible shaft of a TEE probe within an esophagus. The second robotic module is configured to couple with a device catheter angulator to alter an angle of a tip of the device catheter within a heart chamber during a procedure or to couple with a second control dial of a handle of a TEE probe to control advancement or angulation of the flexible shaft of the TEE probe. The manipulator device is configured to advance a tip of the device catheter or TEE probe relative to anatomy of the patient.

The invention relates to the technical field of medical catheters, and particularly discloses an anti-bending intracranial double-catheter guiding catheter which comprises a catheter body formed by an outer catheter and an inner catheter inserted into the outer catheter, at least two anti-bending sections are arranged in the axial direction of the catheter body at intervals, and anti-bending supporting mechanisms are arranged in the anti-bending sections; the anti-bending supporting mechanism comprises an annular cavity and memory alloy spiral wires, the annular cavity is formed in the wall layer of the outer catheter, the multiple memory alloy spiral wires are arranged in the annular cavity in a circumferential array mode, temperature control pipes are arranged in the annular cavity and located in gaps among the multiple memory alloy spiral wires, and the temperature control pipes are in an S shape in the annular cavity; the circulating pipeline penetrates through the wall layer of the outer guide pipe and is communicated with the outside; a temperature medium is injected into the temperature control tube through the circulating pipeline, so that the memory alloy spiral wire is activated through temperature to generate a shape memory effect; therefore, dynamic adjustment of the anti-bending rigidity of the guide pipe is achieved.

A balloon guide catheter system including a balloon guide catheter having a catheter shaft that includes: (i) a main lumen; (ii) an inflation lumen; and (iii) an exhaust lumen. The terminating distal end of the inflation lumen and the terminating distal end of the exhaust lumen being in localized fluid communication with one another underneath the balloon while in a non-inflated state. A balloon is disposed about a distal region of an outer surface of the catheter shaft. The exhaust lumen is configured to purge the residual air in a proximal direction and out from a proximal region of the balloon guide catheter.

The embodiment of the invention provides a multi-terminal processing method and system for real-time sharing of emergency clinical data. A method for detecting intravascular conditions by modifying a multi-modal sensor on a cardiovascular catheter. According to the method, a sensor integrated at a detection end of a catheter with a gradient refractive index nano coating is utilized to obtain light transmittance distribution and blood flow disturbance parameters of the inner wall of a blood vessel. According to the characteristics of the data, a computed tomography coding strategy related to vascular pathology is formulated, the strategy is converted into a rendering instruction set for terminal hardware characteristics, and the rendering instruction set is compressed into a data stream carrying vascular information through a video coding protocol. And finally, distributing the processed data to different devices, realizing the elasticity visualization of the blood vessel wall, optimizing a detection mode according to user feedback, and generating a control instruction to further guide the catheter operation. According to the technical scheme provided by the embodiment of the invention, the accuracy and efficiency of data multi-terminal processing can be improved.

The guide catheter assembly comprises a catheter, a reinforcing tube and a catheter base, the reinforcing tube is arranged on the catheter in a sleeved mode, one end of the reinforcing tube and one end of the catheter both extend into the catheter base, the catheter comprises an outer layer, a middle layer, an inner layer and the hydrophilic coating, the middle layer is arranged on the outer layer, the inner layer is arranged on the middle layer, and the hydrophilic coating is arranged on the inner layer. The hydrophilic coating comprises a first hydrophilic coating and a second hydrophilic coating, and the outer layer, the middle layer and the inner layer are sandwiched between the first hydrophilic coating and the second hydrophilic coating. The surface and the outer surface of the inner cavity of the catheter body are coated with the hydrophilic coatings, and the hydrophilic coatings activated in the inner cavity of the catheter body can reduce the friction coefficient between an instrument and the inner cavity of the guide catheter, so that the friction force is reduced; the hydrophilic coating activated on the outer surface of the catheter body can reduce the friction coefficient between the outer surface of the guiding catheter and inner cavities of instruments such as blood vessels, guiding sheaths or vascular sheaths, and therefore friction force is reduced.

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 multifunctional auxiliary device for in-situ dialysis catheter replacement. A guide wire sequentially passes through a puncture tube. As the sharp end of the puncture tube pierces through a blocking membrane, it passes through a guiding catheter, passes through a dialysis catheter connected to a connecting tube along the guiding catheter, and penetrates into the human body along the dialysis catheter. Compared with the prior art, the present invention has the following advantages: during the replacement of a hemodialysis catheter, when the guide wire enters the blood vessel, the blood leakage along the gaps between the guide wire and the catheter lumen in the catheter is significantly reduced; it avoids serious complications such as air embolism caused by air entering the body along the guide wire; it reduces the contact with the original catheter during the operation, making the sterile area in the operation process cleaner and reducing the infection incidence rate. The operator can also complete the operation calmly, relatively improving the safety of the newly placed catheter and the effect of the new catheter. In addition, the injection connecting tube connected to a syringe can be used for angiography through a side hole to distinguish the reasons for the poor function of the original catheter, evaluate the local vascular conditions, and help to propose a better catheter treatment plan.

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 system for performing a neurovascular procedure includes an interventional device assembly having a guidewire having a guidewire hub, an access catheter having an access catheter hub, and a guide catheter having a guide catheter hub. The system includes a first hub adapter, a second hub adapter, a third hub adapter, and a support table, wherein each of the first hub adapter, the second hub adapter, and the third hub adapter is movably carried by the support table. The first hub adapter, the second hub adapter, and the third hub adapter are configured to move along the support table to drive the interventional device assembly until the interventional device assembly is positioned to effect supraaortic vascular access.

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.

The utility model provides an ultrasonic balloon recanalization guiding catheter and a catheter system. The catheter system comprises an ultrasonic generator and the ultrasonic balloon recanalization guiding catheter. The ultrasonic balloon recanalization guide catheter comprises a balloon guide catheter, an ultrasonic catheter and a connecting seat. The balloon guiding catheter comprises an inner tube, a first outer tube and a first balloon, the near end of the first balloon is connected with the far end of the first outer tube, the far end of the first balloon is connected with the inner tube, and the near end of the inner tube and the near end of the first outer tube are both connected with the connecting base. The ultrasonic catheter is movably arranged in the inner tube in a penetrating mode. An ultrasonic transducer is arranged at the far end of the ultrasonic catheter, the ultrasonic generator is electrically connected with the ultrasonic transducer, and the ultrasonic transducer is used for releasing ultrasonic waves to target tissue. The expanded first balloon can be anchored in a target pipeline so as to limit the movement amplitude of the ultrasonic catheter in the radial direction of the first balloon. According to the ultrasonic balloon recanalization guide catheter, the catheter head end can be prevented from entering a blood vessel false cavity, thrombus is prevented from escaping, and then the safety and reliability of an operation can be improved.

The utility model discloses a urethral catheter for urethral malformation and stenosis patients, which comprises a urethral catheter, a guide tube is arranged at the front end of the urethral catheter, a water injection tube, a fixing tube and a drainage tube are arranged at the rear end of the urethral catheter, and the urethral catheter, the water injection tube, the fixing tube and the drainage tube are integrally formed. The fixing tube is connected with a fixing connector, first side holes are formed in the fixing connector and the guide tube, and an air bag and a second side hole are formed in the peripheral wall of the catheter. The urethral catheter with the guide wire for guiding is more favorable for patients with urethral malformation and stenosis to use, is favorable for reducing injury, is also favorable for faster rehabilitation, is more reasonable in design, and is convenient to produce, manufacture and install.

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 present invention relates to a guiding catheter delivery and rotation driving device for vascular interventional surgery, comprising a guiding catheter delivery mechanism and a guiding catheter rotation mechanism; the guiding catheter delivery mechanism includes a sleeve assembly, a locking mechanism and a guiding catheter, the guiding catheter is disposed within the sleeve assembly, the sleeve assembly is used for supporting and guiding the movement of the guiding catheter, one end of the guiding catheter passes through the locking mechanism, and the locking mechanism clamps and releases the vascular sheath; the guiding catheter rotation mechanism includes a pressing groove, a Y-valve assembly, a rotation transmission assembly and a mounting plate, the other end of the guiding catheter is connected to the Y-valve assembly, the Y-valve assembly is mounted on the pressing groove, the pressing groove is mounted on the mounting plate, the Y-valve assembly rotates driven by the rotation transmission assembly and drives the guiding catheter to rotate; the present invention solves the problem of fixed clamping of the Y-valve and the guiding catheter, realizes the quick disassembly and assembly of the Y-valve, limits the overall deformation amount, speeds up the response speed of the catheter end, and improves the delivery efficiency.

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.

A guide catheter extension / pre-expansion system of the present disclosure includes: an outer delivery sheath; an inner member extending within the sheath; and an engaging / disengaging mechanism for engaging / disengaging the inner member to / from the sheath. The inner member is configured with a tapered distal tip having a delivery microcatheter and a pre-dilation balloon member attached to the tapered distal tip proximate the microcatheter. The outer delivery sheath and the inner member are modified for different engagement / disengagement mechanism operations. The external delivery sheath includes one or more apertures configured to reduce or eliminate the risk of myocardial ischemia.

The invention relates to the technical field of medical equipment, and discloses a nasal gastrointestinal catheter imaging imbedding system which comprises a control table, the control table is connected with a navigation module, the control table is used for controlling the system, and the navigation module is used for providing real-time navigation information and assisting a doctor or an operator in guiding a catheter or a tool to a needed position. The navigation module is connected with the endoscopic device, the endoscopic device is used for capturing internal images of the esophagus, the stomach or the intestinal tract of a patient, the console is connected with the imaging control module, the imaging control module is used for controlling the images of the endoscopic device, and the console is connected with the remote operation module. Through the network stabilization module, the network stability of the remote operation module in the nasal gastrointestinal catheter imaging imbedding system can be enhanced, so that an expert doctor can obtain enough information to carry out accurate diagnosis, the treatment progress of a patient cannot be delayed, and the pain of the patient is reduced.

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.

A system, method, and devices are disclosed herein for feeding sections of conduit through a guide device which positions the conduit sections for bundling and then bundling the sections of conduit with a spacer device comprising a pair of brackets which encircle the conduit bundle and are banded together. In one implementation of the technology, a device for guiding conduit sections comprises an outer frame which encloses walls which intersect to form a grid. The grid comprises multiple channels through which multiple sections of conduit pass in parallel. In another aspect of the technology, a system of feeding and organizing multiple sections of conduit from conduit reels to a conduit guide and spacer system is provided.

By advancing the chuck nut (52) relative to the collet jaws (51b) provided at the proximal end (30p) of the pusher catheter (30) and arranged along the outer periphery of the guiding catheter (10), the amount by which the collet jaws (51b) approach the guiding catheter (10) changes.