84 results about "Distal catheter" patented technology

An intravascular blood pump may have a catheter (10) and a pumping device (1) attached to the catheter (10). The catheter (10) extends along a longitudinal axis and has a distal end (11) and a proximal end (12) opposite the distal end (11). The catheter (10) may have a tubular stiffening structure (15) extending longitudinally between the proximal end (12) and the distal end (11) of the catheter (10). The tubular stiffening structure (15) has a lumen (21) and a proximal end (17) and a closed distal end (16) opposite the proximal end (17), wherein the lumen (21) of the stiffening structure (15) is configured to receive a pressurized fluid having an over-pressure of at least 5 bar.

An integrated electrode structure can comprise a catheter shaft comprising a proximal end and a distal end, the catheter shaft defining a catheter shaft longitudinal axis. A flexible tip portion can be located adjacent to the distal end of the catheter shaft, the flexible tip portion comprising a flexible framework. A plurality of microelectrodes can be disposed on the flexible framework and can form a flexible array of microelectrodes adapted to conform to tissue. A plurality of conductive traces can be disposed on the flexible framework, each of the plurality of conductive traces can be electrically coupled with a respective one of the plurality of microelectrodes.

A vascular occlusion catheter may be employed for at least partial occlusion of a target vessel. The vascular occlusion catheter system includes a proximal catheter shaft having at least one internal lumen, and a distal catheter shaft terminating in an atraumatic tip. An occlusion balloon is sealingly mounted to the proximal and distal catheter shafts. A central catheter shaft extends through the proximal catheter shaft, the occlusion balloon and into the distal catheter shaft. The proximal catheter shaft is secured to the central catheter shaft on a proximal side of the occlusion balloon and the distal catheter shaft is secured to the central catheter shaft on a distal side of the occlusion balloon. The occlusion balloon, the proximal catheter shaft and the distal catheter shaft have a greatest outer diameter of less than seven French (7 Fr) in an uninflated condition.

The utility model provides a shock wave balloon catheter with a backflow device and medical equipment, the shock wave balloon catheter comprises a balloon, a catheter, a fluid pump and a pressure reducing valve, and a shock wave generating part is arranged in the balloon; the balloon is arranged at the far end of the catheter, a pressurizing flow channel and a backflow flow channel are arranged in the catheter, the pressurizing flow channel is used for supplying conductive liquid into the balloon, and the backflow flow channel is used for recycling the conductive liquid from the interior of the balloon; the outlet end of the fluid pump is communicated with the pressurizing flow channel so as to provide conductive liquid with certain pressure for the balloon; the inlet end of the pressure reducing valve is communicated with the backflow channel so as to maintain the pressure of the conductive liquid in the balloon, and the outlet end of the pressure reducing valve is communicated with the inlet end of the fluid pump, so that bubbles formed by separation and electrolysis of the conductive liquid in the percussion process of an electrode in the balloon are discharged out of the balloon in time through the backflow channel. Bubbles are prevented from hindering shock waves from acting on calcification lesions, and the effective performance of the shock waves is improved.

A magnetically-tracked catheter system having a catheter and a magnetic beacon. The catheter has a proximal end and a distal end. The catheter includes a first magnetic sensor disposed at (i.e., near) the distal end. The magnetic beacon is configured to be disposed external to an individual and in a target zone. An operator interface is in electronic communication with the first magnetic sensor. The catheter may further include a guide lumen (and / or other lumen or lumens) extending between the proximal end and the distal end and the configured for use with a guidewire. The catheter may include an occlusion member configured to occlude a vessel or other passage of an individual (e.g, respiratory tract, gastrointestinal tract, etc.).

A vascular occlusion catheter is configured for insertion, and at least partial inflation, into a targel blood vessel. The vascular occlusion catheter includes a proximal catheter shaft, a distal catheter shaft, and a semi-compliant or non-compliant occlusion balloon mounted at a proximal side thereof to the proximal catheter shaft and mounted at a distal side thereof to the distal catheter shaft. A central catheter shaft extends through the proximal catheter shaft, the occlusion balloon and into the distal catheter shaft. The central catheter shaft is constructed as the primary load-bearing chassis of the vascular occlusion catheter. The occlusion balloon defines a blown diameter between approximately twenty-five and approximately thirty-five millimeters and the occlusion balloon defines a double-wall thickness of between approximately 0.0003″ and approximately 0.0020″.

A tissue closure system is disclosed, one variation of which generally includes a handle, a proximal catheter section extending from the handle, a deployment section coupled to the proximal catheter section, and a distal catheter section pivotably coupled to the deployment section such that the distal catheter section is rotatable at an angle relative to the proximal catheter section. A receiver member positioned within the deployment section may be configured between a low profile configuration and a deployment configuration. Two or more anterior needle members and two or more posterior needle members may extend distally from the first side and the second side of the proximal catheter section. Two or more front needle members may be received into the two or more openings along the first receiver portion, and two or more rear needle members may be received into the two or more openings along the second receiver portion.

The invention discloses a catheter assembly and a blood vessel hemostasis device thereof. The catheter assembly includes a distal catheter assembly, a balloon assembly, and a guide assembly. The far-side catheter assembly extends in the axial direction; the balloon assembly comprises a balloon body surrounding the far-side catheter assembly; the distal catheter assembly is configured to allow fluid to flow into or out of the balloon; a guide assembly including at least one guide member disposed in the distal catheter assembly and configured to move substantially in the axial direction; wherein the at least one guide member, by axial movement thereof, guides the distal end of the distal catheter assembly to steer in a direction deviating from the axial direction. According to the catheter assembly and the blood vessel hemostasis device, the blood vessel blocking effect can be achieved, the head end of the catheter assembly can be conveniently controlled to turn, and the catheter assembly can conveniently penetrate into the deep position of the blood vessel for blocking.

The invention discloses an extended catheter, which belongs to the technical field of interventional therapy instruments and comprises a push rod and a catheter connected to the far end of the push rod. The catheter comprises a catheter near-end section and a catheter far-end section, the catheter far-end section is located at the farthest end of the catheter, the diameter of the catheter far-end section is smaller than that of the catheter near-end section, and the outer wall of the catheter far-end section is provided with a flow guide groove which is concave inwards. The catheter far-end section with the reduced outer diameter is arranged at the farthest end of the catheter, so that the catheter can conveniently pass through a small and narrow blood vessel; the outer tube wall of the far-end section of the catheter is provided with the flow guide groove which is concave inwards, and in the operation process, when the outer tube wall of the far-end section of the catheter is attached to the wall of a blood vessel, blood in the blood vessel can flow towards the far end along the flow guide groove, so that the phenomenon that local blood pressure is too high due to blockage of the blood vessel is avoided, and damage to a human body caused by long-time blocking of the blood vessel by the catheter is avoided; therefore, the catheter can be safely inserted into a narrow blood vessel deeper in the body.

Coaxial catheter system (150), wherein the system comprises: a catheter (200), comprising: a distal catheter section (222) with a lumen (223) and a distal end with an opening from the lumen, wherein the lumen (223) has an inner diameter at the distal end of at least about 1.3 mm (0.052 in); and a proximal extension connected to and extending proximal to the distal catheter segment (222), wherein the proximal extension is less flexible than the distal catheter segment; and a catheter delivery element (300), comprising: a tubular section with an inner diameter of at least about 0.35 mm (0.014 in) up to about 0.6 mm (0.024 in), an outer diameter, wherein the outer diameter has at least one abutment point; wherein the difference between the inner diameter of the distal catheter section (222) and the outer diameter of the tubular section at this abutment point is not more than about 0.25 mm (0.010 in); a proximal extension that is connected to and extends proximal to the tubular section, wherein the proximal extension is less flexible than the tubular section; and a tip section which is arranged distal to the at least one end point of the tubular section, wherein the tip section has a length and tapers along at least a section of the length of the tip section, wherein the coaxial catheter system (150) has a delivery configuration characterized by: a) the catheter delivery element (300) which is positioned coaxially within the lumen (223) of the distal catheter section (222), wherein the at least one contact point of the tubular section is substantially aligned with the distal end of the distal catheter section (222), and b) wherein the tip section in the feed configuration has at least three points spaced apart along the length of the tip section, comprising at least three points: a distal point (P1) of at least three points, which is located at a distance proximal to the distal end of the catheter delivery element (300), wherein the distal point (P1) has a first bending force which is not greater than about 0.05 Newton; an intermediate point (P2) of at least three points, which is arranged at a distance proximal to the distal point (P1), wherein the intermediate point (P2) has a second bending force; and a proximal point (P3) of the at least three points, which is arranged at a distance proximal to the intermediate point (P2), wherein the proximal point (P3) has a third bending force; and c) wherein the coaxial system has at least two system points along a length of the coaxial system, the at least two system points comprising: a first system point (S1) of the at least two system points, which is arranged proximal to the distal end of the catheter section (222), wherein the first system point (S1) has a first system bending stiffness; and a second system point (S2) of the at least two system points, which is arranged distal to the first system point (S1) at a distance that is at least approximately 1 mm distal to the distal end of the catheter section (222), wherein the second system point (S2) may be the same as or different from the proximal point (P3), wherein the second system point (S2) has a second system bending stiffness, wherein the bending force of the coaxial catheter system (150) has a generally constant slope over its length, wherein the generally constant slope of the increasing bending force for the distal tip section of the catheter delivery element (300) transitions into a generally constant slope of the increasing bending force for the coaxial catheter system (150), such that there is no significant increase or change in slope between the two.

Coaxial catheter system (150), wherein the system comprises: a catheter (200), comprising: a distal catheter section (222) with a lumen (223) and a distal end with an opening from the lumen, wherein the lumen (223) has an inner diameter at the distal end of at least about 1.3 mm (0.052 in); and a proximal extension connected to and extending proximal to the distal catheter segment (222), wherein the proximal extension is less flexible than the distal catheter segment; and a catheter delivery element (300), comprising: a tubular section with an inner diameter of at least about 0.35 mm (0.014 in) up to about 0.6 mm (0.024 in), an outer diameter, wherein the outer diameter has at least one abutment point; wherein the difference between the inner diameter of the distal catheter section (222) and the outer diameter of the tubular section at this abutment point is not more than about 0.25 mm (0.010 in); a proximal extension that is connected to and extends proximal to the tubular section, wherein the proximal extension is less flexible than the tubular section; and a tip section which is arranged distal to the at least one end point of the tubular section, wherein the tip section has a length and tapers along at least a section of the length of the tip section, wherein the coaxial catheter system (150) has a delivery configuration characterized by: a) the catheter delivery element (300) which is positioned coaxially within the lumen (223) of the distal catheter section (222), wherein the at least one contact point of the tubular section is substantially aligned with the distal end of the distal catheter section (222), and b) wherein the tip section in the feed configuration has at least three points spaced apart along the length of the tip section, comprising at least three points: a distal point (P1) of at least three points, which is located at a distance proximal to the distal end of the catheter delivery element (300), wherein the distal point (P1) has a first bending force which is not greater than about 0.05 Newton; an intermediate point (P2) of at least three points, which is arranged at a distance proximal to the distal point (P1), wherein the intermediate point (P2) has a second bending force; and a proximal point (P3) of the at least three points, which is arranged at a distance proximal to the intermediate point (P2), wherein the proximal point (P3) has a third bending force; and c) wherein the coaxial system has at least two system points along a length of the coaxial system, the at least two system points comprising: a first system point (S1) of the at least two system points, which is arranged proximal to the distal end of the catheter section (222), wherein the first system point (S1) has a first system bending stiffness; and a second system point (S2) of the at least two system points, which is arranged distal to the first system point (S1) at a distance that is at least approximately 1 mm distal to the distal end of the catheter section (222), wherein the second system point (S2) may be the same as or different from the proximal point (P3), wherein the second system point (S2) has a second system bending stiffness, and where the difference between the second bending force and the first bending force divided by the distance between the distal point and the intermediate point (P2) corresponds to a first flexibility tendency; where a difference between the third bending force and the second bending force divided by a distance between the intermediate point (P2) and the proximal point (P3) corresponds to a second flexibility tendency; where an average of the first flexibility tendency and the second flexibility tendency defines an average flexibility tendency of the peak section; where a difference between the bending force of the first system and the bending force of the second system, divided by the distance between the first system point (S1) and the second system point (S2), corresponds to a third flexibility tendency; and where the ratio between the third flexibility tendency and the average flexibility tendency of the peak section is less than approximately 25.

Various embodiments of the present disclosure can include a high-density electrode catheter. In some embodiments, the high-density electrode catheter can include a catheter shaft including a proximal end and a distal end, the catheter shaft defining a catheter shaft longitudinal axis. In some embodiments, the high-density electrode catheter can include a shaft magnetic position sensor disposed along a distal portion of the catheter shaft. In some embodiments, the high-density electrode catheter can include a flexible tip portion positioned proximate the distal end of the catheter shaft, wherein the flexible tip portion includes a flexible frame. In some embodiments, the high-density electrode catheter can include a plurality of electrodes disposed on the flexible frame. In some embodiments, the high-density electrode catheter can include a tip magnetic position sensor disposed on a portion of the flexible frame.

Described are methods and systems for transcervical access of the cerebral arterial vasculature and treatment of cerebral occlusions, including ischemic stroke. The methods and devices may include methods and devices which may provide aspiration and passive flow reversal, those which protect the cerebral penumbra during the procedure to minimize injury to brain, as well as distal catheters and devices to remove an occlusion. The methods and devices that provide passive flow reversal may also offer to the user a degree of flow control. Devices and methods which provide a way to securely close the access site in the carotid artery to avoid the potentially devastating consequences of a transcervical hematoma are also described.

The invention discloses a pulmonary artery thrombus aspiration catheter and a manufacturing method thereof, and belongs to the technical field of medical instruments. The pulmonary artery thrombus aspiration catheter comprises a catheter body, a catheter head end and a skirt structure, the catheter head end is in a dome shape and arranged at the far end of the catheter body, the catheter head end has flexibility, and a pre-incision is formed in the top of the far end; the skirt edge structure comprises a self-expansion framework and a covering film arranged on the peripheral side of the self-expansion framework, the self-expansion framework has elasticity, and the self-expansion framework can be restrained and folded in the radial direction and can be automatically unfolded in the radial direction to be in a horn mouth shape after being restrained; the near end of the self-expanding skeleton is connected to the catheter body, the far end of the skirt structure is located in the catheter head end when folded, and the pre-incision is closed; when the far end of the skirt structure is unfolded, the catheter head end can be opened, the pre-incision is opened, at least two valve leaflets are formed, the far end edge of the pre-incision does not exceed the far end edge of the skirt structure, a gap is formed between the adjacent valve leaflets and the skirt structure, and damage to the tricuspid valve and other parts can be reduced.

This disclosure relates to electrophysiology catheters. The catheters include a catheter shaft comprising a proximal end and a distal end, the catheter shaft defining a catheter shaft longitudinal axis and a flexible tip portion extending from the distal end of the catheter shaft. In some aspects, the flexible tip portion comprises at least one flexible framework comprising a plurality of electrode-carrying arms, wherein each electrode-carrying arm extends from a distal end of the catheter shaft, wherein each of the plurality of electrode-carrying arms converges with at least one other of the plurality of electrode-carrying arms at a distal end of the at least one flexible framework; a plurality of electrodes coupled to the electrode-carrying arms; wherein each of the plurality of electrode-carrying arms comprises a shape memory material to predispose the at least one flexible framework into a plane, wherein at least a portion of the plane of the at least one flexible framework is disposed at an angle in a range from 80 to 130 degrees to the longitudinal axis of the catheter shaft in a deployed configuration.

To provide a urinary catheter assembly and a method for using the assembly.SOLUTION: The urinary catheter assembly comprises a urinary catheter 1 comprising a container 3, a catheter shaft having a central lumen 12, and a retainer arrangement 20 attached to a distal region of the catheter shaft 11. The catheter shaft is provided with at least one drainage opening in communication with the central lumen, and the retainer arrangement comprises a distal end cavity 22 in communication with the central lumen. The assembly further comprises a lid and a sealing arrangement 21 configured to form a liquid-tight and / or gas-tight seal between the retainer arrangement and the container when the urinary catheter is inserted into the container, wherein the sealing arrangement is further configured to allow the urinary catheter to be displaced in an axial direction while maintaining the liquid-tight and / or gas-tight seal.SELECTED DRAWING: Figure 4a

A device includes a flexible catheter and a material. The catheter includes at least a first channel extending therethrough and is sized and shaped to extend from a proximal end outside a human body to a distal end that can be guided to a target location within a gastrointestinal (GI) system. A first distal portion of the catheter includes at least one exit port communicating with the first channel for administering a fluid to a patient anatomy. The material is fixed to an exterior of the catheter or ejectable from an interior of the catheter into the location that, in a first state or shape, is suitable for guiding the catheter to the location and, in a second state or shape, is suitable for engaging an inner wall of the location to anchor the catheter in the location while administering the fluid via the first channel.

The invention relates to the technical field of steam ablation, and provides a double-balloon catheter for treating esophagitis through steam ablation and steam ablation device.The double-balloon catheter comprises a far-end catheter body, a steam catheter body, a far-end air bag, a near-end catheter body and a near-end air bag, the steam catheter body is at least partially arranged in the far-end catheter body in a penetrating mode, and the steam catheter body is provided with a steam section; the steam section extends out of the far-end catheter, and a steam hole is formed in the steam section; the far-end air bag is positioned at one end of the steam section, and is communicated with an intra-tube space of the far-end catheter; at least part of the near-end catheter is arranged in the steam catheter in a penetrating mode, the near-end catheter is provided with an exposed section, and the exposed section extends out of the steam catheter; the near-end air bag is located at the end, away from the far-end air bag, of the steam section and communicates with the intra-catheter space of the near-end catheter. And hot steam is kept between the two balloons and cannot leak to a non-lesion area, so that the hot steam can be effectively prevented from damaging normal human tissues in the non-lesion area.

A hydrodynamic direct flow catheter system (10a-e) comprising a manifold (14) having a central elongated tubular body (16) with a proximal end and a distal end, an elongated flexible catheter tube (12a-e) having a proximal end and a distal end, the proximal end of the catheter tube (12a-e) extending into and distally out of the distal end of the central tubular body (16) of the manifold (14), a tapered flexible tip (40) having a proximal end and a distal end, the tapered flexible tip (40) having a central passageway (88) extending therethrough, the elongated flexible catheter tube (12a-e) having an elongated distal portion, the elongated distal portion of the catheter tube (12a-e) having a proximal end and a distal end,wherein the distal end of the elongated distal section is connected to the proximal end of the tapered flexible tip (40), a tubular fluid jet ejector (52) disposed in the elongated distal section proximal to the proximal end of the tapered flexible tip (40), one or more inflow openings (38) in the distal section proximal to the tubular fluid jet ejector, the tubular fluid jet ejector (52) having a proximal end and a distal end, a plurality of spaced radially aligned fluid jet openings (90a-n) around a peripheral surface of the tubular fluid jet ejector, the spaced radially aligned fluid jet openings (90a-n) opposite the proximal end of the tubular fluid jet ejector,a plurality of holes (94a-n) in the elongated distal portion and in corresponding alignment with the plurality of spaced radially directed fluid jet orifices (90a-n), an elongated flexible high-pressure tube (50) having a proximal end and a distal end, the elongated flexible high-pressure tube (50) extending from the manifold (14) through the elongated flexible catheter tube (12a-e) and terminating in the tubular fluid jet emitter (52), and a high-pressure fluid source (42) delivering pressurized fluid into the proximal end of the elongated flexible high-pressure tube, the radially directed fluid jet orifices (90a-n) having diameters between 0.0254 mm (0.001 in.) to 1.016 mm (0.040 in.).

The utility model relates to a temperature-controllable injection catheter and system, and belongs to the technical field of medical instruments. Comprising a catheter rod, a far-end catheter, a guide wire seat, a guide wire cavity, a circulating water channel and a temperature control circulating water tank, the circulating water channel of the catheter is composed of a circulating water inlet, a circulating water outlet, a circulating water cavity channel and a through hole, and the guide wire cavity serves as a liquid injection cavity at the same time. Hot water or cold water is supplied into the guide pipe through the circulating water channel and the system so as to heat or cool liquid in the injection cavity, and the purpose of temperature control injection is achieved. Through refrigeration of the temperature control circulating water tank, circulating water with the temperature lower than the room temperature is provided, the effect of cooling liquid in the injection cavity is achieved, and it can be achieved that liquid medicine needing to be stored at the low temperature does not lose efficacy or inactivate due to the body temperature before reaching a target lesion site.

Tissue closure systems are disclosed wherein one variation generally includes a handle, a proximal catheter segment extending from the handle, a deployment segment coupled to the proximal catheter segment, and a distal catheter segment pivotably coupled to the deployment segment such that the distal catheter segment is rotatable at an angle relative to the proximal catheter segment. A receiver member positioned within the deployment segment is configurable between a low-profile configuration and a deployed configuration. Two or more forward needle members and two or more rear needle members are extendable distally from a first side and a second side of the proximal catheter segment. The two or more forward needle members are receivable into the two or more openings along the first receiver portion and the two or more rear needle members are receivable into the two or more openings along the second receiver portion.

To provide a multi-barrel drill guide for drilling a pilot hole at a surgical repair site and inserting a suture anchor into the pilot hole while maintaining alignment of the drill guide with the pilot hole.SOLUTION: A multi-barrel drill guide comprises: an elongated body extending along a longitudinal axis and having a proximal end and a distal end; an elongated distal guide tube attached to and extending from the distal end of the elongated body; and a handle extending from the elongated body between the proximal end and the distal end. The elongated body has a first channel extending from the proximal end to the distal end, and a second channel extending from the proximal end to the distal end at an angle relative to the first channel. The first channel and the second channel intersect at a convergence area at the distal end. A drill bit is movable in a slidable manner within the second channel, and a driver loaded with a suture anchor is movable in a slidable manner within the first channel.SELECTED DRAWING: Figure 1

Disclosed herein are two-piece rapid insertable central catheters (RICCs), introducers therefor, and methods thereof. For example, an introducer and a distal catheter component of a RICC can be combined in an introducer assembly configured to be actuated with a single finger of the same hand while the introducer is held between the thumb and another finger or fingers of the hand. A catheter advancement hub of the introducer includes a manifold coupled to a proximal portion of a distal catheter hub component of the distal catheter component. A guide needle of a syringe of the introducer has a needle shaft extending through the manifold and a distal end of the distal catheter component. An introducer housing is positioned over a syringe tip, the manifold, and the proximal portion of the distal catheter component. The introducer housing of the introducer is configured to provide column strength to a catheter tube of the distal catheter component during venipuncture.

Described are methods and systems for transcervical access of the cerebral arterial vasculature and treatment of cerebral occlusions, including ischemic stroke. The methods and devices may include methods and devices which may provide aspiration and passive flow reversal, those which protect the cerebral penumbra during the procedure to minimize injury to brain, as well as distal catheters and devices to remove an occlusion. The methods and devices that provide passive flow reversal may also offer to the user a degree of flow control. Devices and methods which provide a way to securely close the access site in the carotid artery to avoid the potentially devastating consequences of a transcervical hematoma are also described.

The intermittent urinary catheter assembly includes a catheter (1) having a proximal insertion end (12) and a distal end opposite the proximal insertion end. The catheter has a lumen extending from a drainage opening (14) at or near the proximal insertion end to a drainage opening at or near the distal end. A protective sleeve device (2) is also provided, including a proximal retention portion (22), a distal retention portion (21), and a compressible sleeve (23) connected to the proximal and distal retention portions. The compressible sleeve has a compressed storage configuration and is expandable to an expanded configuration. The distal retention portion is connected to the catheter at or near the distal end, and the proximal and distal retention portions are releasably connected to each other.

The invention provides an interventional diagnosis and treatment catheter and diagnosis and treatment equipment. Relates to the field of medical instruments. Comprising a catheter sheath, a transduction unit and a catheter end interface, the transduction unit is sleeved with the catheter sheath, the far end of the transduction unit is a detection end, and the detection end is located at the far end of the catheter sheath; the near end of the catheter sheath is connected with a first shell of the catheter end connector. The first shell is rotationally connected with a first rotating inner core of the catheter end connector. The near end of the transduction unit comprises a driving end and a signal transmission end, the driving end is connected with the first rotating inner core, and the signal transmission end is connected with a contact module in the first rotating inner core; and under the condition that the first shell is clamped with the second shell of the host end interface, the first rotating inner core is in transmission connection with the second rotating inner core of the host end interface, and the contact module is electrically connected with the probe module in the second rotating inner core. Omnibearing panoramic detection control is realized, and detection signals can be fed back in real time.

An intravascular blood pump for percutaneous insertion comprises a catheter (10) and a pumping device (1) attached to the catheter (10). The catheter (10) extends along a longitudinal axis and has a distal end (11) and a proximal end (12) opposite the distal end (11). The catheter (10) comprises an elongate stiffening structure (15) extending continuously longitudinally along the length of the catheter (10) between the proximal end (11) and the distal end (12) of the catheter (10). The stiffening structure (15) may comprise a shape-memory material, such as Nitinol. It may be in the form of a wire that extends loosely through the lumen of the catheter and helps to avoid or significantly reduce kinks in the catheter.

The application belongs to the technical field of medical devices, and particularly relates to a resection device, which comprises a handle body, a catheter connected to the handle body, and a cutter head assembly arranged at the distal end of the catheter, wherein a bending adjusting assembly is arranged on the catheter, the bending adjusting assembly comprises a first bending adjusting point, a second bending adjusting point arranged on the catheter, and a bending adjusting connecting piece for connecting the first bending adjusting point and the second bending adjusting point, and a control assembly for controlling the bending adjusting assembly is arranged on the handle body. According to the resection device in the application, the bending radius of the distal end catheter is adjusted through the bending adjusting assembly, the catheter is offset towards a predetermined direction, the orientation of the cutter head assembly is controlled, the risk of scratching and perforating the blood vessel is reduced, and an ideal blood vessel diameter can be obtained through multiple resections.

The invention relates to the technical field of medical instruments, and particularly discloses a passage catheter special for releasing a vertebral artery stent through a radial artery admission passage, the passage catheter comprises a catheter, the catheter comprises an adjusting catheter and a body catheter, the adjusting catheter and the body catheter are coaxially connected, the body catheter comprises a near-end catheter and a far-end catheter, and the near-end catheter and the far-end catheter are coaxially connected. The near-end catheter comprises a first-stage coating, a first-stage outer tube, an annular cavity channel and a first-stage inner tube, a design scheme for adjusting the bending angle of the far-end catheter is adopted, the bending angle of the far-end catheter can be flexibly adjusted, the near-end catheter can adapt to complex blood vessels, the surgical operation difficulty is reduced, and the surgical efficiency is improved; the catheter comprises the soft head end, and when the head end makes contact with the inner wall of the blood vessel, damage to the blood vessel can be reduced; the catheter has two blood vessel entering modes, namely, the same-side blood vessel entering mode and the different-side blood vessel entering mode, the application mode of the catheter can be widened, and the instrument using cost of a patient is reduced.