354 results about "Aspiration catheter" patented technology

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.

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.

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.

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.

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 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 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.

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.

An aspiration catheter includes a body having a proximal end and an opposite distal tip, with a lumen extending therethrough in a longitudinal direction from the proximal end to the distal tip. The aspiration catheter further includes a stabilizing structural member that stabilizes the body relative to the inner wall of the blood vessel to minimize movement and / or radial expansion of the distal tip of the body when subjected to aspiration that would otherwise potentially damage the inner wall of the blood vessel.

A blood reintroduction system can include a canister having a chamber configured to collect blood. A system may include an inlet configured to fluidically connect the chamber to a first tubing in fluid communication with an aspiration catheter. A system may include a first filter within the chamber, wherein the first filter is configured to separate blood from thrombus. A system may include a second filter downstream of the first filter, wherein the second filter is configured to separate blood from thrombus. A system may include a second tubing connected to an outlet of the chamber, wherein the second tubing is configured to reintroduce filtered blood from the chamber to a patient's vasculature.

The utility model provides an intravascular thrombus aspiration catheter. The intravascular thrombus aspiration catheter comprises an internal flow channel, a far-end aspiration catheter section, a middle catheter section and a near-end driving catheter section, and the internal flow channel is sequentially communicated with the far-end aspiration catheter section, the middle catheter section and the near-end driving catheter section from the far end of the intravascular thrombus aspiration catheter to the near end of the intravascular thrombus aspiration catheter. Wherein the intravascular thrombus aspiration catheter further comprises an aspiration inlet and an outflow window, and the internal flow channel is communicated with the aspiration inlet and the outflow window; the inner flow channel is provided with an impeller; a suction inlet, an impeller and an outflow window are sequentially arranged from the far end to the near end of the intravascular thrombus suction catheter, and the intravascular thrombus suction catheter further comprises a filter screen. The filter screen is arranged between the impeller of the inner flow channel and the outflow window, or the filter screen is arranged outside the outflow window and wraps the outflow window. According to the intravascular thrombus aspiration catheter, the working load of the impeller can be effectively reduced, and then adverse events caused by excessive heat generated due to large load are reduced.

Disclosed are embodiments of an aspiration catheter comprising a centering assembly for preventing vessel tissue from being drawn into the aspiration lumen and / or into close proximity to an injection of pressurized fluid from a supply lumen during aspiration of a thrombus. The centering assembly may include one or more balloons mounted adjacent to the distal end of the aspiration catheter and which can be selectively inflated to center the distal end of the aspiration catheter within vessel lumen and space the distal end apart from the vessel wall.

The invention discloses a far-end controllable stent suction catheter, and relates to the technical field of medical instruments. Comprising an outer tube, an inner tube and a handle, the inner tube is sleeved with the outer tube, one end of the outer tube is connected to the handle, a telescopic mechanism used for moving the inner tube is arranged on the handle, a connecting mechanism is arranged at the other end of the outer tube, a head end ring is arranged on the connecting mechanism, and a developing ring is connected to the end, away from the handle, of the inner tube and located on the inner side of the outer tube. The side, away from the inner pipe, of the developing ring is connected with an expansion flower type pipe, telescopic pipes are arranged at the two ends of the inner side of the expansion flower type pipe correspondingly, a rolling belt is installed between the telescopic pipes at the two ends, and polytetrafluoroethylene coatings are arranged on the two sides of the rolling belt correspondingly. The expansion flower type tube can be pushed outwards through the telescopic mechanism on the handle, the expansion flower type tube expands outwards and is automatically attached to the blood vessel wall, the angle of the outer tube does not need to be adjusted, operation is more convenient, thrombus can be compressed when moving, and meanwhile damage to the blood vessel wall is reduced.

Disclosed is a valve balloon suction catheter, comprising a tip, a balloon, a catheter, and a handle base in sequence from a distal end to a proximal end, the catheter being provided with a fluid passage lumen. The balloon consists of at least four balloon bodies, which are distributed circumferentially around the catheter to form a circular configuration, so as to create a blood flow channel in the center of the balloon, the blood flow channel being arranged in the axial direction of the balloon. A micro axial flow pump is provided in the blood flow channel and is arranged on the catheter, and a guidewire conduit penetrating through the micro axial flow pump is provided in the micro axial flow pump. A distal end of the guidewire conduit passes through the blood flow channel and is fixedly connected to the tip, and a proximal end of the guidewire conduit penetrates through the handle base. A guidewire lumen is provided in the guidewire conduit. The micro axial flow pump is connected to an external impeller drive interface arranged at a proximal end of the handle base. Compared with the prior art, the combination of balloon dilatation and mechanical circulatory assistance establishes a drainage pathway from the left ventricle to the ascending aorta, enabling cardiac blood circulation and improving the safety of the procedure.

Methods and apparatuses for electrical monitoring, including electrical impedance monitoring, using electrodes positioned on a catheter to help identify the type of material in contact with the catheter. In particular, described herein are methods and apparatuses for using impedance data streams to identify a material that may be encountered when performing a vascular procedure including: clot material, blood, saline, air, and / or vessel wall, by analyzing and classifying impedance conditions. Also described herein are methods of electrically and / or mechanically probing the local area around the catheter (e.g., the tip of an aspiration catheter) to help characterize the conditions and surrounding materials.

Methods and apparatuses for monitoring, including optically monitoring an aspiration catheter to identify material in proximity with or within the catheter. In particular, described herein are methods and apparatuses that may be used to identify clot material, and to distinguish clot material from blood and / or vessel wall. Also described herein are methods and apparatuses for using ultrasound to monitor an aspiration catheter.

A hemostasis valve may be used with a catheter such as an aspiration catheter. The hemostasis valve comprises a support, and at least a first lever, pivotably carried with respect to the support. A collapsible tubular sidewall defining a valve lumen is carried by the support. A filament is formed into a loop around the tubular sidewall, the filament having at least a first tail portion extending away from the loop to the first lever. A first spring may be configured to move the first lever in a direction that pulls the first tail portion away from the tubular sidewall, reducing the diameter of the valve lumen in response to reducing the diameter of the loop. A second tail portion may extend away from the loop to a second lever. Each tail portion may be attached to its respective lever, or may be slidably advanceable around a fulcrum on the lever and attached with respect to the support.

Disclosed herein are devices, systems, and methods for at least partially automatically aspirating clot material and blood from the vasculature of a patient, filtering the blood from the clot material, and returning the blood to the vasculature of the patient. In some embodiments, a system in accordance with the present technology can include (i) an aspiration catheter configured to be positioned within the vasculature of a patient proximate to clot material therein, (ii) an aspiration assembly selectively fluidly couplable to the aspiration catheter, (iii) a filter assembly selectively fluidly couplable to the aspiration assembly, (iv) a reinfusion and flushing assembly selectively fluidly couplable to the filter assembly, (v) a reinfusion catheter selectively fluidly couplable to the reinfusion and flushing assembly and configured to be positioned within the vasculature, and (vi) a control system communicatively coupled to the aspiration assembly, the filter assembly, and / or the reinfusion and flushing assembly.

An aspiration thrombectomy system for use with an aspiration catheter, connection tubing to place a vacuum source and the aspiration catheter in fluid communication, controllable valves to control a level of negative pressure provided by the vacuum source, ultrasonic sensors to detect ultrasonic energy in the aspiration catheter or the connection tubing, and an automated controller to generate, via the controllable valves, while the system is operated in a first operational state, a pressure wave in the aspiration catheter or the connection tubing, detect, via the ultrasonic sensors, ultrasonic energy in the aspiration catheter or the connection tubing based on ultrasonic energy originating from the ultrasonic sensors, determine, based at least in part on the generated pressure wave and the detected ultrasonic energy, a system state in the aspiration catheter or the connecting tubing, and operate, based on the determined system state, the system in a second operational state.

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, a plurality of supporting rods and at least one tightening ring; the multiple supporting rods extend in the direction parallel to the longitudinal central axis of the suction catheter and are arranged on the outer side of the first supporting ring at intervals in the circumferential direction. The tightening ring is located on the near end side of the first supporting ring and arranged outside the multiple supporting rods in a sleeving mode. In a natural state, the tightening ring tends to contract inwards in the radial direction. When the far end of the suction catheter is blocked by thrombus, the part, sleeved with the tightening ring, of the supporting rod bends and deforms inwards under the action of the tightening ring and negative pressure. The supporting rod rotates with the first supporting ring as a fulcrum, so that the far-end section of the supporting rod tilts outwards, the far-end end of the supporting pipe expands, and thrombus abutting against the far-end end of the suction catheter can smoothly enter the suction catheter.

The invention provides a vascular occlusion suction system and laser ablation equipment, and belongs to the technical field of medical instruments.The suction system comprises a suction catheter, a collecting device, a negative pressure generating device, a flow sensing device and a control device.The first end of the suction catheter acts on the application position of a target object; an inlet of the collecting device is communicated with the second end of the suction catheter to form a first channel of the suction channel, the negative pressure generating device is communicated with an outlet of the collecting device to form a second channel of the suction channel, the flow sensing device is used for monitoring the real-time flow of the suction channel, and the control device is configured to respond to gear selection operation. The initial suction gear is determined, the negative pressure generation device is controlled to work at the initial suction gear, and the gear adjustment prompt instruction is output according to the real-time flow, so that an operator can conveniently carry out gear adjustment on the negative pressure generation device subsequently or directly carry out automatic gear adjustment on the negative pressure generation device; and the capacity of intelligently adjusting the suction negative pressure of the suction system is effectively improved.

An aspiration system (1) for an intravascular device includes an aspiration catheter (2) configured for insertion into an associated blood vessel: and a normally closed flow control valve (10) connected to control the aspiration of material from the associated blood vessel via the aspiration catheter. The normally closed flow control valve includes a flow inlet (14) operatively connected with the aspiration catheter, a flow outlet (16) operatively connectable with an associated vacuum pump, and a vacuum pull actuator (18) operatively connected to the flow outlet whereby vacuum at the flow outlet operates the vacuum pull actuator to open the normally closed flow control valve.

The application discloses a kind of thrombus suction control method and thrombus suction device, and thrombus suction device includes suction assembly, suction assembly includes the shell with pressure cavity, piston rod and suction catheter, thrombus suction device also includes the motor of piston rod movement and the controller connected with motor, control method is: suction catheter is positioned to the blood vessel without thrombus, make motor operate according to speed V0, calibrate the pressure value B in pressure cavity under normal blood condition;Suction catheter is positioned to the blood vessel with thrombus, make motor operate according to speed V1, V1≤V0, make dynamic pressure value A0 in pressure cavity: when A0≤B, make motor keep speed V1 operation;When A0>B, make motor increase from speed V1: when B<A0≤C, make motor increase to speed V2 operation;When C<A0≤D, make motor increase to speed V3 operation;When D<A0≤E, make motor increase to speed V4 operation.The control method thrombus removal efficiency is high, and blood loss can be reduced.

The invention relates to the technical field of medical instruments, in particular to a catheter device for taking out blood vessel thrombus, which comprises a connector and a suction catheter body, one end of the suction catheter body is connected with a suction port of the connector, and a liquid suction pipe orifice communicated with an inner cavity is fixedly mounted on the side surface of the connector. A guide wire is inserted into the inner side of the suction catheter body in a penetrating mode and penetrates through an inner cavity of the connector. The thrombus aspiration catheter has the advantages that the aspiration catheter body is slowly inserted into a blood vessel, the aspiration opening of the aspiration catheter body is moved to the thrombus, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, and the thrombus can be aspirated. The guide wire is driven by the adjusting mechanism to extend forwards along the inner cavity of the suction catheter body, the guide wire firstly drives the telescopic mechanism to slide forwards, and the guide wire continues to move close to the suction opening of the suction catheter body.

An endotracheal lung suction system includes an endotracheal tube defining a tube lumen, a suction assembly, and an inner suction catheter. The endotracheal tube comprises an inflation connector and an implantation balloon adjacent the distal tube end and fluidically connected to the inflation connection and through which the balloon inflates. The suction assembly comprises a proximal valve and a distal endotracheal tube connector fluidically connected to an interior of the tube lumen. The inner suction catheter passes through and slides within the suction assembly, the endotracheal tube connector, and through the tube lumen to extend slidably out from and back into the distal tube end. The inner suction catheter comprises a distal, inflatable, hollow, inner-suction- catheter securing device and a catheter body defining a main lumen extending through the inner suction catheter and a catheter-securing inflation lumen extending through the inner suction catheter parallel to the main lumen.