74 results about "Thrombus aspiration" patented technology

The invention discloses a thrombus excision system. An embolus is extracted through a mechanical embolus extraction device, a blood vessel is dredged, and revascularization of the blood vessel is achieved. A saccule guide catheter is put at the near end of the embolus part when the embolus is extracted, blood flow is temporarily blocked, and thus a fine crushed embolus generated in the embolus extraction process is prevented from being flushed to the far end of the blood vessel; meanwhile, for a relatively large embolus, a part of thrombus can also be sucked by virtue of the saccule guide catheter, and then the residual thrombus can be extracted by virtue of a thrombus exsector. The thrombus exsector, the saccule guide catheter and a delivery microcatheter are arranged on the thrombus excision system disclosed by the invention, wherein the thrombus exsector is used as a main component, an excision spring is arranged, and the release state of the excision spring is a conical spiral state. Compared with the prior art, the thrombus excision system has the advantages that the thrombus exsector is very soft, the minimal through size is 0.014' (0.36mm), the thrombus exsector can easily enter a cerebral vessel, a near-end protection technology is adopted in the operation process, and thrombus suction is combined with mechanical embolus extraction, so that the success rate of the operation is improved, and the complications are reduced.

The utility model discloses a thrombus aspiration plugging sheath system based on a special-shaped cavity, which comprises a vacuum device, an aspiration plugging sheath, an aspiration plugging sheath and an aspiration plugging sheath, and is characterized in that the vacuum device comprises a negative pressure needle cylinder and a piston buckle arranged on the side wall of the negative pressure needle cylinder; the balloon sheath tube comprises a tube body, a balloon used for blocking is arranged at the far end of the tube body, a connector connected with the vacuum device is arranged on the side of the near end of the tube body in a supporting mode, and a plurality of special-shaped cavities are formed in the tube body; the thrombus dragging instrument is used for blocking blood flow to reduce blood loss during thrombus suction and intercepting the thrombus to prevent the thrombus from escaping when the thrombus is dragged; the vacuum device is arranged on the side branch of the near end of the balloon sheath tube, and the thrombus dragging instrument is arranged in the balloon sheath tube. According to the embodiment of the utility model, the balloon filling opening and the thrombus suction opening are formed in the catheter body, a multi-cavity structure is adopted, the balloon sheathing canal blocks blood flow, and the thrombus dragging instrument is matched with a vacuum device to suck, drag and take out thrombus.

The present disclosure relates generally to thrombectomy devices. An exemplary catheter comprises: an emitter assembly comprising at least one emitter; wherein each emitter comprises an electrode pair, and wherein each emitter is configured to generate a plurality of cavitation bubbles when a voltage is applied to the pair of electrodes; an infusion lumen formed by at least a portion of an outer wall of the catheter, the infusion lumen configured to receive a conductive fluid, wherein the emitter assembly is housed within the infusion lumen, wherein a distal segment of the infusion lumen includes a plurality of holes on the portion of the outer wall of the catheter, and wherein the plurality of holes are configured to release the conductive fluid and the plurality of cavitation bubbles out of the catheter to treat thrombus at a treatment site; an aspiration lumen including aspiration ports at the distal segment thereof.

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.

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 thrombus aspiration catheter comprises a catheter body and a deformation structure, and the deformation structure comprises a plurality of supporting rings and deformation assemblies arranged between every two adjacent supporting rings; when the axial distance between every two adjacent supporting rings is reduced, the deformation assembly deforms inwards in the radial direction, and the deformation assembly and the two adjacent supporting rings jointly form a variable-diameter channel with the inner diameter firstly decreasing and then increasing from far to near. When the axial distance between every two adjacent supporting rings is increased, the deformation assemblies deform and recover in the radial direction, and the minimum inner diameter of a channel formed by the deformation assemblies and the two adjacent supporting rings is correspondingly increased. The variable-diameter channel can form mechanical wrapping and clamping on the thrombus at the position with the minimum inner diameter, and thrombus escape or far-end embolism in the suction process is effectively prevented; meanwhile, the structure is beneficial for forming a negative pressure enhancing cavity at the far end of the catheter body, and stable grasping and concentrated efficient suction of the thrombus are achieved.

The application provides a medical catheter, comprising: a catheter seat comprising a first communication interface and a second communication interface; a tube body, an inside of the tube body being provided with a suction channel and a liquid channel, a proximal end of the suction channel being in communication with the first communication interface, a distal end of the suction channel being open at a distal end of the tube body, a proximal end of the liquid channel being in communication with the second communication interface, and a distal end of the liquid channel being in communication with the distal end of the suction channel. By using the medical catheter, the thrombus suction efficiency is improved, and the medical catheter is suitable for removing thrombus of various shapes and textures.

The present invention relates to a thrombus aspiration catheter, comprising: an aspiration tube extending along an axis and having an aspiration port at a distal end; the guide wire tube is connected to the far-end side of the suction tube, the near-end side of the guide wire tube is fixed to the periphery of the suction tube, the part, overlapped with the suction tube, of the guide wire tube forms a connecting section, and the part, extending towards the far end, of the guide wire tube forms a suspended section; the flexural rigidity of the suction section and the flexural rigidity of the guide wire tube are both smaller than the flexural rigidity of the main body section; or the inner wall of the suction tube is provided with a sliding groove extending to the far end along the axis, the far end of the sliding groove is provided with a containing section, and the far end of the connecting rod is fixed to the near end of the guide wire tube. Through deformation of the guide wire tube or embedding of the guide wire tube into the tube wall of the suction tube, the guide wire can be used for guiding to quickly reach the preset position, the sectional area of the suction cavity of the suction tube is not damaged, and the suction efficiency and the pushing performance of the suction tube can be improved at the same time.

The invention relates to the technical field of medical instruments, and discloses a blood vessel intracavity plaque rotary cutting and thrombus aspiration integrated device which comprises a guiding tube and a rotary cutting tube, the rotary cutting tube abuts against the lower portion of the guiding tube, and a connecting mechanism is arranged between the ends, close to each other, of the guiding tube and the rotary cutting tube. The guiding pipe and the rotary cutting pipe are in limiting connection through a connecting mechanism, a miniature double-shaft motor is installed in the lower end of the rotary cutting pipe, the output end of the lower side of the miniature double-shaft motor is fixedly sleeved with a rotary cutting knife, a cavity is formed in one side of the rotary cutting pipe, and a suction inlet is formed in the lower end of the cavity; a fixing shell is fixedly arranged on the inner wall of one side of the middle end of the rotary cutting pipe, and a piston is arranged in the fixing shell in a sliding mode. According to the intravascular plaque rotary cutting and thrombus suction integrated device, after plaque rotary cutting is conducted, thrombus can be directly sucked out, suction equipment does not need to be inserted for the second time, the working efficiency can be greatly improved, and the pain of a patient is relieved.

The invention discloses a thrombus aspiration catheter with a reducing balloon and a preparation method, and relates to the technical field of medical instruments. The suction catheter comprises a catheter main body, a compliance balloon, two Luer tapers and two developing rings, the double-cavity structure of the catheter main body comprises a thrombus suction cavity and a balloon pressurization cavity; the compliance balloon is fixedly mounted at the far end of the catheter main body, and the compliance balloon is communicated with the balloon pressurizing cavity; the catheter body is provided with a reducing area with the near-end inner diameter smaller than the far-end inner diameter in the axial direction. The two developing rings are respectively embedded in the catheter main body corresponding to the two sides of the compliance balloon; the two Luer tapers are respectively a first Luer taper and a second Luer taper, the first Luer taper is communicated with the thrombus aspiration cavity, and the second Luer taper is communicated with the balloon pressurization cavity so as to input pressure into the balloon pressurization cavity. By means of the balloon adherence, the plugging effect is improved, the suction efficiency is improved, the thrombus falling risk is reduced, and the catheter in-place performance and the operation flexibility are improved.

Disclosed herein are pneumatic syringes and associated systems and methods. A pneumatic syringe in accordance with the present technology can include a syringe barrel, a pneumatic barrel, and a plunger assembly extending between and movably positioned within the syringe barrel and the pneumatic barrel. The pneumatic syringe can further include a control unit configured to direct a flow of pressurized fluid from a fluid source into the pneumatic barrel to cause the plunger assembly to move between a withdrawn position and a depressed position within the syringe barrel. To move to the withdraw position, the control unit can direct the flow of pressurized fluid into a distal chamber of the pneumatic barrel to drive the plunger assembly proximally. To move to the depressed position, the control unit can direct the flow of pressurized fluid into a proximal chamber of the pneumatic barrel to drive the plunger assembly distally.

This invention provides a thrombus aspiration catheter with a variable distal inner diameter, belonging to the field of interventional surgical instrument technology. The catheter includes an interventional catheter, an operating handle, and a collection component. The interventional catheter is used to move along the blood vessel to approach the thrombus location. The operating handle is located at the proximal end of the interventional catheter to provide suction force. The collection component is located at the distal end of the interventional catheter, with its proximal end communicating with the interventional catheter and its distal end open and adjustable in diameter. When the interventional catheter moves along the blood vessel to approach the thrombus, the diameter of the collection component is in a contracted state and not larger than the diameter of the interventional catheter. After the collection component reaches its position, it expands to increase its distal diameter for overall thrombus aspiration. This invention primarily addresses the technical problems of existing small-diameter thrombus aspiration catheters, which suffer from insufficient suction force, require repeated aspiration, and are prone to thrombus escape, while large-diameter catheters have poor permeability and are difficult to reach the lesion site.

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; a filter screen is arranged in an inner flow channel of the middle guide pipe section and is positioned between the suction inlet and the outflow window; at least one of the far-end suction catheter section, the middle catheter section and the near-end driving catheter section is detachably connected, and the suction inlet is formed in the far-end suction catheter section. According to the intravascular thrombus aspiration catheter provided by the invention, due to the segmented detachable design, the use convenience is facilitated.

A dynamic aspiration system includes a vacuum source, an aspiration catheter, a connecting tube, controllable valves to control a level of pressure in the aspiration catheter or the connecting tube, pressure sensors to detect pressure readings, and a controller capable of utilizing an artificial neural network (ANN) trained to predict flow state classifications. The controller may receive pressure readings from the sensors, provide the pressure readings as input data for the ANN, classify, via the ANN, a current flow state in the aspiration catheter or the connecting tube based on outputs generated by the ANN, and operate the controllable valves based on the classification of the current flow state. The controller operates the controllable valves in a first pressure protocol if the classification by the ANN is restricted or obstructed, and operates the controllable valves in a second pressure protocol if the classification by the ANN is unrestricted.

The invention provides a thrombus aspiration catheter, and belongs to the technical field of interventional instruments. Comprising a catheter body, a suction opening is formed in the far end of the catheter body, a guide unit is arranged at the far end of the catheter body, and the guide unit is configured to be capable of being controllably switched between a guide state and a suction state so as to dynamically meet the requirements of different operation stages; wherein in the process that the catheter body advances along a blood vessel, the guide unit keeps a guide state that the radial size is gradually reduced in the extension direction from the near end to the far end; after the catheter body reaches a target position, the far end of the guide unit is bent towards the near end of the catheter body and used for exposing the suction opening to enter a suction state; the thrombus aspiration catheter is mainly used for solving the technical problems that when an existing thrombus aspiration catheter is delivered through a middle auxiliary catheter, operation is tedious, and operation efficiency is affected.

Methods and apparatuses for blood clot aspiration. Described are fluid management components and assemblies for blood clot extraction from a patient's body and for filtering blood and recirculating blood back into the patient's body. Also disclosed is a vent system including a common vent line (1508) to fluidly couple a reservoir (1403), a clot capture chamber (1405) and a blood return syringe (1409).

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.

This application provides a thrombus aspiration catheter and catheter assembly. The thrombus aspiration catheter includes: a tube body having an inner lumen with a first central axis; the inner lumen is divided into an aspiration chamber and a guidewire chamber that are not interconnected in a direction perpendicular to the first central axis; the guidewire chamber has a second central axis that is offset from the first central axis. The sidewall of the tube body is provided with multiple rows of holes spaced apart along the axial direction of the tube body. Each row of holes includes multiple side holes spaced apart along the circumference of the tube body. Each side hole communicates with the aspiration chamber, and the diameter of the multiple side holes increases with the vertical distance between the center of the multiple side holes and the second central axis. The thrombus aspiration catheter of this application embodiment can improve the stability of fluid flow within the tube body.

The utility model relates to a thrombus removing device for the coronary artery. The thrombus removing device comprises a suction device and a thrombus taking support movably connected with the suction device. The thrombus extraction stent is of a self-expansion structure, at least three barbs are arranged on the inner side of the self-expansion structure, and the free ends of the barbs face the near end; bulges capable of increasing the surface roughness are arranged on the surfaces of the barbs and the self-expansion structures; the barbs are distributed in a spiral manner; the suction device comprises a suction guide pipe, and the end face of a suction opening of the suction guide pipe is an inclined face. The thrombus extraction support is located in the suction catheter and is adjacent to the inner wall of the suction catheter. According to the thrombus removing device for the coronary artery, thrombus suction and capturing are combined, the viscosity between thrombus and the thrombus removing device is enhanced by means of the special barbs spirally distributed on the self-expansion structure and the protrusions capable of increasing the surface roughness, and it is guaranteed that the thrombus is firmly captured and removed.

The utility model provides a thrombus suction separator and a thrombus suction device, and relates to the technical field of medical instruments. The thrombus aspiration separator comprises a core wire which is arranged in the thrombus aspiration catheter in a penetrating mode, the near end of the core wire is an operation end, and the far end of the core wire is a leading-in end. The developing wrapping part correspondingly wraps the far end of the core wire; the protective sleeve correspondingly sleeves the far end of the core wire and is positioned on one side of the near end of the developing coating piece; the separation ball head is correspondingly arranged at the joint of the protective sleeve and the developing coating piece in a sleeving manner; the periphery of the inner side of the separation ball head is of a cavity structure, cutting nets are correspondingly arranged on the periphery of the inner side of the separation ball head, and conical cutting parts are correspondingly arranged on the two sides of the separation ball head. According to the thrombus suction device, large thrombus can be smoothly cut and broken, suction is facilitated, thrombus blocked in blood vessels can be effectively cleaned, and the thrombus suction device is simple and ingenious in overall design, flexible and convenient to use and high in practicability.

Methods and apparatuses for blood clot aspiration may include the use of a positive pressure pump that is configured to provide high flow rates and / or high pressure upon activation. In particular, methods and apparatus using peristaltic pumps for providing on-demand and high flow rates are described herein. Also described herein are vacuum augmented peristaltic pumps and methods of using them, including methods of using them for clot removal.

This invention relates to a thrombus aspiration catheter, comprising: an aspiration tube extending along an axis and having an aspiration port at its distal end; a guidewire connected to the distal end of the aspiration tube, its proximal end fixed to the outer periphery of the aspiration tube, the portion of the guidewire overlapping with the aspiration tube forming a connecting section, and the portion extending distally forming a suspended section; the aspiration tube includes an aspiration section and a main body section, the bending stiffness of the aspiration section and the guidewire being less than the bending stiffness of the main body section; or, the inner wall of the aspiration tube has a groove extending distally along the axis, the distal end of the groove having a receiving section, and a connecting rod, the distal end of which is fixed to the proximal end of the guidewire. This application, through guidewire deformation or embedding of the guidewire into the aspiration tube wall, enables rapid reaching of a predetermined position using the guidewire without damaging the cross-sectional area of ​​the aspiration cavity of the aspiration tube, thereby simultaneously improving the aspiration efficiency and pushing performance of the aspiration tube.

The invention provides a thrombus aspiration catheter, and belongs to the technical field of intervention equipment. The catheter comprises a catheter body, the near end of the catheter body is connected with suction equipment, the far end of the catheter body is provided with a pressure relief hole used for reducing the instantaneous suction force of the catheter body, and the far end of the catheter body is further provided with a blocking component used for blocking the pressure relief hole so as to control the pressure relief state of the pressure relief hole and guarantee the stability of the suction force of the catheter body. The thrombus aspiration catheter is mainly used for solving the technical problem that when a traditional thrombus aspiration catheter is started, wall biting is easily caused by instantaneous aspiration force concentration, and blood vessel injury is caused.

The invention provides a negative pressure suction device, and belongs to the technical field of thrombus suction negative pressure equipment. The device comprises a handheld suction pump, a suction connecting pipe and a drainage connecting pipe, the handheld suction pump is provided with a suction part and a driving part, and the suction part comprises a needle cylinder and a core rod; the driving part comprises a main handle, an auxiliary handle and an elastic reset piece, the far end of the main handle is connected with the needle cylinder, the far end of the auxiliary handle is connected with the core rod, the main handle and the auxiliary handle are hinged through a pivot, and the elastic reset piece is arranged between the main handle and the auxiliary handle; the suction connecting tube is communicated with the suction port of the needle cylinder and is used for connecting a treatment catheter; the liquid discharge connecting pipe is communicated with the liquid discharge port of the needle cylinder and is used for discharging sucked waste liquid; a check valve is arranged in the suction connecting pipe and / or the drainage connecting pipe and is used for ensuring the stability of suction negative pressure; the technical problems that in the prior art, negative pressure suction operation is tedious, negative pressure stability is poor, and thrombus easily escapes in a middle catheter are mainly solved.

The application provides a negative pressure suction device, and belongs to the technical field of thrombus suction negative pressure equipment; the device comprises a handheld suction pump, a suction connecting pipe and a liquid discharge connecting pipe; the handheld suction pump has a suction part and a driving part; the suction part comprises a needle cylinder and a core rod; the driving part comprises a main handle, an auxiliary handle and an elastic reset member; the distal end of the main handle is connected with the needle cylinder, the distal end of the auxiliary handle is connected with the core rod, the main handle and the auxiliary handle are hinged through a pivot, and the elastic reset member is arranged between the main handle and the auxiliary handle; the suction connecting pipe is in communication with the suction port of the needle cylinder and is used for connecting a treatment catheter; the liquid discharge connecting pipe is in communication with the liquid discharge port of the needle cylinder and is used for discharging waste liquid sucked; a check valve is arranged in the suction connecting pipe and / or the liquid discharge connecting pipe, so as to ensure the stability of suction negative pressure; and the device is mainly used for solving the technical problems of complicated negative pressure suction operation, poor negative pressure stability and easy escape of thrombus in an intermediate catheter in the prior art.

The invention relates to a catheter device (1) for retrieving a thrombus (T) from a vessel. The catheter device comprises a main body (15) with an internal channel (15') extending at least through a distal part of the main body (15). An attachment element (4) is optionally attached or attachable to the main body (15) by a flexible line (2). The attachment element (4) further comprises a magnetic element (7) for steering and / or guiding by an external magnetic actuator and is adapted to attach to the thrombus (T) by means of a suction mechanism. The suction mechanism may include a suction hole (8) and / or a suction line (3). The suction mechanism may comprise a suction cup (6). The thrombus (T) is retrievable with the catheter device by exerting a pulling force on the attachment element (4) via the flexible line (2).

The application provides an extracorporeal control device, a control method and a thrombus suction device for thrombus suction. The extracorporeal control device comprises a main pipeline, a main valve, a pressure display device, a main static negative pressure source and at least one secondary negative pressure control unit. The distal end of the main pipeline is used for detachable connection with the proximal end of a suction catheter, the main valve is arranged at the distal end of the main pipeline, the pressure display device is in communication with the main pipeline and is close to the proximal end of the main valve, the main static negative pressure source is used for generating a static suction negative pressure, and the main static negative pressure source is in communication with the main pipeline and is located at the proximal end of the main valve. Each secondary negative pressure control unit comprises a secondary valve and a secondary static negative pressure source, and the secondary valve is used for enabling the secondary static negative pressure source to be in communication with or disconnected from the main pipeline. The technical scheme of the application can detect and display the suction negative pressure change condition in the thrombus suction process, is beneficial to quickly judging the reason why the thrombus cannot be sucked out, timely and correctly taking corresponding measures, improving the treatment efficiency and reducing the treatment risk.

This invention discloses a thrombus aspiration device and a thrombus aspiration surgical kit. The thrombus aspiration device includes a syringe; a piston rod, the front end of which extends into the syringe and moves with the syringe piston, and the rear end of which protrudes outside the syringe; and a check valve, disposed between the syringe and the piston rod, having an unlocked state that allows the piston rod to move axially and a locked state that restricts the piston rod from moving forward axially. The check valve is configured to switch back and forth between the unlocked and locked states in response to the rotation of the piston rod; alternatively, the rear end of the piston rod has a switch element, and the check valve is configured to switch back and forth between the unlocked and locked states in response to the switching action of the switch element. This invention provides a thrombus aspiration device and a thrombus aspiration surgical kit that maintains the current position of the piston rod after the piston rod is pulled out to create a negative pressure environment inside the syringe and the force applied by the hand is removed.

The invention discloses a radio frequency closed catheter and a manufacturing method thereof, and relates to the technical field of medical instruments.The radio frequency closed catheter comprises an inner film, the inner film is composed of a left section and a right section, a heating wire is wound on the outer surface of the right section of the inner film, a spiral coil is wound on the outer surface of the left section of the inner film, and the outer surface of the spiral coil is wrapped with a woven mesh; and outer membranes are arranged on the outer surfaces of the woven mesh at the left section and the heating wire at the right section of the inner membrane. Due to the existence of the metal ring net, the catheter is not easy to fold to form creases in use so as to influence use, and compared with an existing catheter adopting a PI (Polyimide) or PEEK (Polyether Ether Ketone) tube design, the whole structure is smaller in bending radius, low in rigidity, easy to push in tortuous veins, large in internal aperture, and capable of supporting thrombus aspiration or passing through other required instruments such as guide wires; meanwhile, the liquid injection function can be achieved through the guide pipe, the low-impedance copper-nickel flat wire heating body is suitable for low-voltage driving equipment, and the safety performance is higher.

A system for blood clot removal can include a first tube, a second tube slidable within the first tube, and a self-expanding receptacle having a membrane and positioned at least partially within the second tube. When a proximal portion of the second tube and the receptacle are positioned within a distal end of the first tube and the second tube is moved proximally relative to the receptacle until a distal end of the second tube is positioned proximally of a proximal end of the receptacle, the proximal portion of the receptacle can radially expand and contact the distal end of the first tube, and a distal portion of the receptacle can radially expand such that it has an inner diameter that is at least 10% greater than an inner diameter of the first tube.