470 results about "Aspiration catheter" patented technology

An aspiration catheter assembly including an outer catheter having an elongate tubular body and a distal valve at a distal end of the aspiration catheter assembly, and an inner catheter configured to communicate with a vacuum source, the inner catheter being within the outer catheter and including an aspiration lumen for receiving at least a portion of a clot. The distal valve is configured to be opened and closed at the distal end of the aspiration catheter assembly, and the distal end of the aspiration catheter assembly is configured as a separator such that the portion of the clot can be separated at the distal end and drawn into the aspiration catheter assembly.

The invention discloses an intelligent thrombus suction and cutting system, and belongs to the field of medical instruments. According to the system, the design of double pressure sensors and the intelligent pressure feedback control technology are adopted, and the suction state (blood suction, thrombus suction or complete blockage) is accurately recognized by monitoring pressure changes in a negative pressure pump pipeline and a suction catheter in real time and combining historical data analysis. The system automatically adjusts parameters of a pipeline control valve, a negative pressure pump, a peristaltic pump and the like according to the parameters, and intelligent optimization control over the suction process is achieved. The innovative integrated design of the double-cavity catheter integrates the functions of suction and thrombus breaking, when the complete blockage state is judged, the thrombus breaking program can be automatically or manually started, thrombus is quickly broken through high-speed liquid impact or thrombolysis medicine injection, and long-time suction catheter blockage is effectively prevented. The system obviously improves the thrombus aspiration efficiency, reduces the blood loss amount of a patient, optimizes the operation process, and has a good clinical application prospect.

Example aspiration catheters and systems including aspiration catheters are disclosed. An example aspiration catheter includes a catheter body having a proximal end region, a distal end region and a lumen extending therein. The aspiration catheter also includes a fluid supply tube extending within the lumen of the catheter body, the fluid supply tube having a distal end region and a distal facing surface. The aspiration catheter also includes a funnel having a proximal end and a distal end, wherein the proximal end is coupled to the distal end region of the catheter body, and wherein the funnel is configured to shift between a collapsed configuration and an expanded configuration.

A dynamic aspiration system includes a connecting tube, a vacuum source, a pressure source, an aspiration catheter, a first controllable valve to control a level of negative pressure provided by the vacuum source, a second controllable valve to control a level of positive pressure provided by the pressure source, pressure sensors, and a controller. The controller modulates the controllable valves to generate pressure pulses, determines, for each of the pressure pulses, a degree of success corresponding to a change in a flow in the aspiration catheter or the connecting tube responsive to the pressure pulse, identifies one or more first pressure pulses determined to have the highest degrees of success, and modulates the controllable valves to generate the first pressure pulses in one or more pressure pulse cycles.

A dynamic aspiration method including engaging a distal end of an aspiration catheter against an occlusion in a blood vessel, applying a vacuum through an aspiration lumen of the aspiration catheter using a vacuum source coupled to a proximal end of the aspiration lumen by a connecting tube, whereby portions of the occlusion are drawn into the aspiration lumen, through the connecting tube and into a collection receptacle by the vacuum source, sensing flow through the connecting tube, and automatically generating pressure differentials when a clog or restricted flow is detected.

The invention belongs to the technical field of medical instruments, and particularly relates to an integrated plugging balloon suction catheter. The suction catheter comprises a woven mesh tube, the near end of the woven mesh tube is connected with a handle, and the far end opening of the woven mesh tube is used for being close to the thrombus position; the balloon is arranged on the periphery of the woven mesh tube in a sleeving mode, and the balloon is arranged at the far end of the woven mesh tube; the handle comprises a catheter suction port and a filling port, the catheter suction port is communicated with the far port of the woven mesh tube, and the filling port is communicated with the balloon. The aspiration catheter can effectively reduce the occurrence rate of thrombus escape, so that the risk of far-end embolism is reduced, and good prognosis of a patient is achieved through efficient thrombus extraction; and the extra cost of using other instruments can be reduced, so that the comprehensive cost of the operation is reduced, the thrombus extraction success rate is greatly improved, manpower and material resources are saved, and a patient is benefited.

The invention relates to a thrombus aspiration system and a control method of the thrombus aspiration system, relates to the technical field of medical equipment, and can improve the thrombus aspiration efficiency. An intelligent control module in the system is configured to execute the steps of determining the pressure difference between the near end and the far end according to pressure data collected by a first pressure sensor and pressure data collected by a second pressure sensor, determining the pressure difference change rate of the pressure difference, and determining the pressure difference change rate of the pressure difference according to flow data collected by a flow sensor. Determining the flow change rate of the blood flow in the suction catheter; according to the pressure difference change rate and the flow change rate, the medium type corresponding to the current suction medium of the suction guide pipe is determined; when the suction medium is blood, intermittent suction is performed on the blood according to a preset frequency when a valve in the air pressure state conversion module is in a closed state; and when the suction medium comprises thrombus of a target volume, determining a target frequency corresponding to the target volume, and opening and closing a valve in the air pressure state conversion module for multiple times according to the target frequency while keeping suction.

An aspiration thrombectomy system for use with a vacuum source and an aspiration catheter includes an aspiration catheter, connection tubing configured to act as a common conduit for fluid communication between the aspiration catheter and a vacuum source, controllable valves operable to selectively open and close to control fluid flow, pressure sensors associated with the aspiration catheter or the connection tubing, and an automatic controller configured to operate the valves in a first operational state to generate fluid pressure changes, detect pressure levels in the system, wherein changes in the detected pressure levels are correlated with the generated fluid pressure changes, determine system states based on system state scores determined based on the detected pressure levels, the system state scores indicating a measure of occlusion in the aspiration catheter or the connection tubing, and operate the valves in a second operational state based on the determined system states.

Aspiration catheters for removing clot material from a patient, systems including these catheter as well as methods of making and using these aspiration catheters may be configured to remove clot material in long, continuous strips that prevent release of smaller clot fragments back into the vessel. Also described herein are blood collection apparatuses that may allow safe and easy reperfusion of collected blood.

The invention provides a thrombus aspiration catheter with a flow monitoring function. The device comprises a suction tube body, a suction handle, an ultrasonic flow sensing assembly, a processing unit and a display module, the ultrasonic flow sensing assembly is arranged at the far end of the suction pipe body and used for monitoring a blood flow signal at a suction opening of the suction pipe body. The processing unit is electrically connected with the ultrasonic flow sensing assembly and is used for processing the blood flow signal and calculating to obtain suction indication information; the display module is connected with the processing unit and is used for displaying the suction indication information; the suction indication information comprises blood flow information. Therefore, the blood flow near the suction port of the suction catheter can be obtained through monitoring of the ultrasonic flowmeter, whether the suction port is aligned with the thrombus or not and whether the thrombus is sucked into the catheter or not can be judged in an auxiliary mode, the thrombus can be sucked more accurately without unnecessarily drawing out blood, blood loss of a patient is reduced, meanwhile, the suction efficiency is improved, and the blood taking time is shortened. The treatment effect is improved.

Systems and methods for aspiration thrombectomy are provided. An aspiration thrombectomy system for use with a vacuum source and an aspiration catheter includes a connection tube configured to function as a fluid conduit between the aspiration catheter, a fluid source, and the vacuum source. The system may be provided with a controllable valve and a pressure sensor associated with the connection tube. The controller may detect a pressure profile in the connection tube via one or more pressure sensors. The controller may determine whether the connection tube is occluded based on the detected pressure profile, and may determine a location of the occlusion. The controller may operate one or more valves to introduce a fluid medium into the connection tube.

Methods for aspiration to remove thrombus / clot material using a system configured to remove, filter and return clot. These methods allow the removal of clot material using a fluidically-driven aspiration device when attached to an aspiration catheter and proximate to obstructive clot material. A fluidic actuator drives an aspirator, which may be automatically controlled to apply a vacuum in a pattern to enhance clot removal and collection from the body as well as improve blood return using the same closed system. The fluidic actuator may direct the aspirated blood through a filter and deaerator to allow the filtered blood to be returned to the patient.

Thrombectomy devices are provided that include an aspiration catheter and a spinner device movable axially within the aspiration catheter. The spinner device includes a rotation shaft including a proximal end coupled to a motor configured to spin the shaft, a distal end carrying a spinner head movable axially within the aspiration catheter and configured to generate localized suction when the shaft rotates. The spinner device may also include an outer sleeve surrounding the rotation shaft at least partially along its length to protect the aspiration catheter. The spinner device and aspiration catheter include cooperating stops that limit advancement of the spinner device to prevent the spinner head from being exposed beyond a short distance beyond a distal end of the aspiration catheter, e.g., a wing-stopper provided on one of the rotation shaft, spinner head, and outer sleeve, and a corresponding ring within the distal end of the aspiration catheter.

The invention provides a suction catheter, an expandable part is arranged at the far end of the suction catheter, and the expandable part comprises a first expandable layer, an expandable assembly and a second expandable layer which are sequentially arranged from inside to outside. When the interior of the expandable assembly is subjected to expansion force, the expandable assembly can expand outwards in the radial direction of the suction catheter, and the first expandable layer and the second expandable layer expand outwards to deform or expand along with expansion of the expandable assembly, so that the inner cavity diameter of the far end of the suction catheter is increased. By the adoption of the thrombus aspiration catheter, the far end of the aspiration catheter can expand outwards when being stressed, so that the stent is pulled into the aspiration catheter more easily, and the risk of thrombus escape is reduced.

The utility model discloses a pulmonary alveolar lavage device which comprises a suction catheter and an ultrasonic probe, wherein the suction catheter is used for entering a bronchus through an insertion tube of an endoscope for pulmonary alveolar lavage, and the ultrasonic probe is used for entering the bronchus through the suction catheter. The suction catheter comprises a non-transparent flexible section located at the far end and a transparent section communicated with the near end of the flexible section, and the hardness of the transparent section is larger than that of the flexible section. By using the alveolar lavage device, the shape of the bronchus into which the suction catheter enters and the runner condition of the suction catheter can be observed in real time, and the suction catheter can be prevented from being blocked.

Blood circuit apparatuses having one or more pumps that are configured to provide a first, positive, pressure and a second, negative, pressure may couple to an aspiration catheter and are coupled to a blood return circuit including a blood return line are also connected to a controller that is configured to independently control the movement of the positive and negative pressure. These apparatuses may be used to remove clot material, filter the clot material, and return the filtered blood to the a chamber for immediate or later return to the patient.

The invention provides an aspiration catheter which comprises a catheter body and a tip portion located at the distal end of the catheter body, the tip portion is provided with at least one expandable assembly, and the expandable assembly is configured to be expandable outwards in the radial direction of the aspiration catheter, so that the cross-sectional area of the tip portion is increased. According to the aspiration catheter, the expandable assembly is arranged at the far end of the aspiration catheter, the expandable assembly can expand outwards in the radial direction to increase the inner diameter of the tip part when thrombus is aspirated, the cross sectional area of the tip part is also increased, and therefore the aspiration force of the aspiration catheter on the thrombus can be effectively increased.

Example aspiration catheters and systems including aspiration catheters are disclosed. An example aspiration catheter includes a catheter body having a proximal end region, a distal end region and a lumen extending therein. The aspiration catheter also includes a fluid supply tube extending within the lumen of the catheter body, the fluid supply tube having a distal end region and a distal facing surface. The aspiration catheter also includes a funnel having a proximal end and a distal end, wherein the proximal end is coupled to the distal end region of the catheter body, and wherein the funnel is configured to shift between a collapsed configuration and an expanded configuration.

The invention provides a thrombus aspiration catheter with the variable inner diameter of the far end, and belongs to the technical field of interventional surgical instruments.The catheter comprises an interventional catheter, an operating handle and a collecting component, and the interventional catheter is used for moving along a blood vessel to be close to the thrombus position; the operating handle is arranged at the near end of the interventional catheter and is used for providing suction force for the interventional catheter; the collecting part is arranged at the far end of the interventional catheter, the near end of the collecting part is communicated with the interventional catheter, and the far end is open and adjustable in diameter; when the interventional catheter moves along the blood vessel to be close to the thrombus, the diameter of the collecting part is in a contracted state and is not larger than that of the interventional catheter, and after the collecting part is in place, the collecting part expands to increase the diameter of the far end so as to integrally suck the thrombus; the thrombus aspiration catheter is mainly used for solving the technical problems that in the prior art, a small-caliber thrombus aspiration catheter is insufficient in aspiration force, repeated aspiration is needed, thrombus escape is easily caused, and a large-caliber catheter is poor in passing ability and difficult to reach a diseased region.

The invention discloses an adjustable thrombus breaking device, and belongs to the technical field of interventional therapy instruments, the adjustable thrombus breaking device comprises a guide wire tube and a guide wire, the tube wall of the guide wire tube is provided with a guide wire port, and the guide wire port is located at the position close to the far end of the guide wire tube; the guide wire is arranged in the guide wire tube in a penetrating mode, the far end of the guide wire is connected with the far end of the guide wire tube, the guide wire can penetrate out of the guide wire opening in a bent shape, and the part, penetrating out of the guide wire opening, of the guide wire forms a broken plug structure. The guide wire can penetrate out of the guide wire opening formed in the guide wire tube, the thrombus breaking structure is formed by the guide wire penetrating out of the guide wire opening, the outer diameter of the thrombus breaking structure can be adjusted through the guide wire, and the thrombus breaking device has the advantages of being simple in structure, high in flexibility and high in thrombus breaking efficiency and can adapt to complex blood vessel structures and suction catheters with small catheter diameters.

Thrombectomy devices, systems, and methods are provided for performing thrombectomy procedures that include an aspiration catheter, a spinner device, and a source of vacuum, e.g., a pump for aspirating clot through the catheter. The spinner device includes a shaft including a proximal end coupled to a motor, a distal end earning a spinner head positionable in a lumen of the catheter for debulking and / or otherwise removing clot adjacent an outlet in a distal end of the catheter. The catheter may be introduced into a body lumen to posi tion the outlet adjacent a target clot, the source of vacuum may be activated, and, with the spinner head within the catheter adjacent the outlet, the motor may be activated to spin the spinner head to debulk and / or otherwise remove the clot through the catheter lumen around the spinner device.

The invention provides a suction catheter. The suction catheter comprises a macromolecule tube and a supporting tube arranged in the wall of the macromolecule tube. The supporting pipe comprises a first supporting ring and a plurality of supporting rods, and the supporting rods extend in the direction parallel to the longitudinal center axis of the suction catheter and are arranged on the outer side of the first supporting ring at intervals in the circumferential direction. The supporting rod comprises a near-end section, a middle section and a far-end section which are sequentially connected, the near-end section and the middle section are located on the near-end side of the first supporting ring, the far-end section is located on the far-end side of the first supporting ring, and the rigidity of the far-end section or the near-end section is larger than that of the middle section. When the far end of the aspiration catheter is blocked by thrombus, the middle section of the supporting rod is bent inwards, the far end section of the supporting rod tilts outwards, and therefore the far end of the supporting rod expands, and the thrombus originally blocked at the far end of the aspiration catheter can smoothly enter the aspiration catheter.

The invention discloses a peristaltic thrombus breaking and moving suction catheter and a using method thereof, and relates to the technical field of interventional medical instruments.The peristaltic thrombus breaking and moving suction catheter comprises a catheter body, the catheter body comprises a suction channel and an adjusting channel, and the adjusting channel is adjacent to the suction channel; the adjusting channel is provided with the peristaltic structure, the peristaltic structure comprises a plurality of adjusting sections arranged in the axial direction of the catheter body, the expansion degree between the two ends of each adjusting section is adjustable, during thrombus aspiration, the intermittent adjusting sections extrude the aspiration channel during expansion, and the parts, with the maximum expansion degree, of every two adjacent adjusting sections are not adjacent; the adjusting section enables part of the channel wall of the suction channel to be provided with a corrugated structure in the axial direction. And when the expansion degree of the adjusting section is adjusted every time, the positions, with the maximum expansion degree, of the adjusting section are different, so that the channel wall of the suction channel forms dynamic corrugated movement (namely similar to gastrointestinal peristalsis surface movement), and the thrombus carrying power is enhanced.

An aspiration catheter (102) for assisting in retrieval of clots from a blood vessel of a patient includes at least one electrode pair (202) and a first pressure sensor (204) positioned within an inner lumen of the aspiration catheter and second and third pressure sensors (206, 208) positioned on an outer surface of the aspiration catheter. The electrode pair and the pressure sensor are in electrical communication with the console. The console is configured to adjust an aspiration vacuum pressure waveform pattern applied through the aspiration catheter based on electrical input and pressure input from one or more sensors and optionally based on a blood pressure waveform pattern of the patient.

The invention relates to the field of medical instruments, in particular to a suction catheter with a shock wave thrombus breaking function, which comprises a shock wave catheter, a suction tube and a discharge mechanism, and a shock wave guide pipe is arranged in the suction pipe. According to the invention, charges are introduced into the annular electrode and the cylindrical electrode by starting the discharge mechanism, a large amount of charges are accumulated at the two ends of the positive electrode and the negative electrode to generate a strong electric field, neutral particles in a medium between the electrodes are ionized into plasma under the action of the strong electric field, and a discharge phenomenon occurs; rapid temperature change of plasmas and surrounding media generated in the discharging process causes rapid volume expansion and contraction of the surrounding media, the violent movement of particles in the media can generate pressure sound waves and transmit the pressure sound waves outwards through the media, and when the movement speed of the particles exceeds the propagation speed of the sound waves in the media, shock waves can be generated, so that the pressure sound waves are generated. When the shock wave catheter extends into the blood vessel of the human body, calcified plaques in the blood vessel can be efficiently crushed without damaging the endometrium of the blood vessel.

This disclosure provides design, material, manufacturing method, and use alternatives for medical devices. An example aspiration catheter includes a catheter shaft having a proximal end region, a distal end region and a lumen extending therein. The aspiration catheter also includes a tip member having a length and a lumen extending therein, wherein the tip member is coupled to the distal end region of the catheter shaft and a guidewire shaft having a proximal end region and a distal end region. Further, the guidewire shaft extends within at least a portion of the lumen of the catheter shaft and the lumen of the tip member. Further, the distal end region of the guidewire shaft includes an interlock region and a portion of the tip member is engaged with at least a portion of the interlock region.

The invention provides a thrombus aspiration catheter. The thrombus aspiration catheter comprises an inner tube, an inner tube handle, an outer tube and an outer tube handle, the far end of the outer tube is provided with a conical head capable of being elastically opened, the conical head is in a sealed state in a natural state, suction side holes are formed in the peripheral wall of the far end of the outer tube, and the near end of the outer tube is connected with an outer tube handle. The inner tube is movably arranged in the outer tube in a penetrating mode, the far end of the inner tube can eject open and penetrate out of the conical head, the conical head and the inner tube are elastically sealed, the near end of the inner tube extends out of the near end of the outer tube handle and is connected with the inner tube handle, the inner tube handle is provided with a negative pressure source connecting assembly, and the inner tube handle is provided with an adjustable sealing valve. A sealed aspiration channel is formed within the inner tube and an instrument is sealed therethrough. Therefore, aspiration of thrombus in different directions, especially adherent and centered thrombus can be conveniently achieved, the aspiration ports in different directions are convenient and rapid to switch, and the thrombus aspiration efficiency and the thrombus extraction effect can be improved.

The utility model relates to the technical field of medical instruments, and provides a thrombus aspiration catheter. The body comprises a shell, a rotary driving part and a movable driving part, and the rotary driving part and the movable driving part are connected to the shell; an inner tube; a first side suction port is formed in the inner pipe; the inner pipe is sleeved with the middle pipe, and a second side suction opening is formed in the middle pipe; the middle pipe is sleeved with the outer pipe, and a third side suction opening is formed in the outer pipe; the far end of the outer tube is formed by retracting from the far end of the middle tube to the near end of the middle tube; the middle pipe is sleeved with the support, the support is arranged in a half circle in the circumferential direction, and the two ends of the support are connected with the far end of the outer pipe and the far end of the middle pipe respectively; the rotary driving part drives the inner pipe to rotate; the movable driving part is connected with the near end of the outer tube and drives the outer tube to move horizontally relative to the middle tube. The thrombus aspiration catheter can aspirate adherent old thrombus or thrombus in complex blood vessels, can adapt to more intracavity thrombus symptoms, and is faster and safer.

The utility model provides a coronary artery thrombus suction catheter, and belongs to the technical research field of medical instruments. In order to solve the problems that an existing conveying catheter for measuring thrombus is inconvenient to operate and is not beneficial to follow-up thrombus removal, a blocking air bag is arranged on the outer side of a suction catheter, and an auxiliary suction hole is formed in a port of the suction catheter; during use, after the suction catheter penetrates through a thrombus to measure the length of the thrombus, the plugging air bag is inflated to block blood flow in a blood vessel, so that the thrombus is prevented from flowing away along the blood; in the subsequent thrombus removal process, thrombus located between the outer wall of the suction catheter and the inner wall of the blood vessel can enter the inner cavity of the suction catheter from the auxiliary suction hole, in this way, the thrombus can be thoroughly removed, the structure is simple, and operation is convenient.