209 results about "Distal fixation" patented technology

The invention discloses a human body intravascular positioning support, and relates to the field of medical instruments. Comprising a metal wire support which is used for expanding in a blood vessel of a human body to dilate the blood vessel, a plurality of positioning units are arranged on the metal wire support, and each positioning unit comprises a spring and a penetrating type positioning head fixedly connected with the far end of the spring; the near end of the spring is fixedly connected with the metal wire support, and the penetrating type positioning head is used for penetrating into the inner wall of a blood vessel to achieve positioning when the metal wire support is unfolded. Through the design that the spring is combined with the positioning unit of the piercing type positioning head, the unification of stable fixing and safe taking-out of the intravascular positioning stent is achieved.

The invention discloses a bending-adjustable catheter, and relates to the technical field of interventional medical instruments, the bending-adjustable catheter comprises an inner tube, an outer tube, a bending-adjustable supporting tube and a handle, the inner tube comprises an inner tube bending section located at the far end, the inner tube bending section can be bidirectionally bent, and the inner tube bending section at the far end of the inner tube extends outwards from the outer tube; position anchoring of the outer pipe can be achieved through the anchoring structure; the far end of the bending adjusting supporting pipe is connected with the bending adjusting section of the inner pipe, the far end of the outer pipe is fixed to the bending adjusting supporting pipe, and the elasticity modulus of the bending adjusting supporting pipe is smaller than that of the inner pipe. The handle is provided with an inner pipe pushing piece. When the outer tube is anchored to the inner wall of a blood vessel, axial acting force is applied to the inner tube through the inner tube pushing piece, the inner tube control bending section is bent under the action of the axial acting force and supporting force applied by the bending adjusting supporting tube, large-angle bending adjusting can be achieved at the far end of the inner tube, overall rotation of the inner tube and the outer tube is matched, and the far end of the inner tube can rotate in a three-dimensional space. The bending of the adjustable-bending catheter in any direction is realized, and the adjustable-bending catheter can better pass through a roundabout blood vessel.

A thrombus filtering device, comprising: an outer sheath tube (201), a middle sheath tube (202), a proximal filter (204), an inner sheath tube (203) and a distal filter (205). The middle sheath tube (202) comprises a pushing tube (2021) and a steerable tube, the distal end of the pushing tube (2021) being connected to the proximal end of the steerable tube, and the proximal filter (204) being connected to the pushing tube (2021). The outer sheath tube (201) is movably sleeved outside the middle sheath tube (202). The distal filter (205) is connected to the distal end of the inner sheath tube (203); and the inner sheath tube (203) movably penetrates through the middle sheath tube (202), and comprises a proximal delivery tube (2033) and a distal fixing tube (2032) which are connected to each other, the distal fixing tube (2032) being a metal tube and comprising a spring tube section (20321).

Apparatus and associated methods relate to a cabled workout tower (CWT). In an illustrative example, the CWT includes a platform including a proximal base supporting opposing vertical supports extending along a longitudinal axis to a distal affixed pullup module. The CWT includes a weight platform including weight stacks housed. The CWT includes a pulley guided cable system operatively connected to cables with pulleys, including a distal weight platform pulley operatively coupled to a double pulley device. An upper pulley portion operatively couples to a distal base platform pulley and a proximal pull handle by an upper cable. A lower pulley portion operatively couples to an anchored weight proximal pulley anchored to a proximal base platform pulley coupled to a proximal pull handle. Various embodiments may advantageously enable users to perform hanging exercises from the pull up bar and weighted abdominal exercises by engaging the proximal pull handle.

Aspects of the disclosure include delivery devices for transcatheter delivery of a cardiac implant. Delivery devices can include a handle assembly as well as a piston mount connected to the handle assembly and having a distal portion terminating at a nose cap. The distal portion includes a stop extending radially from and fixed to the distal portion. The delivery device further includes a capsule assembly including a biasing element for selectively sheathing the implant and a plurality of retraction members secured about a distal end of the biasing element to control deployment of the implant. In various examples, the biasing element is a helical compression spring and the implant is a prosthetic tricuspid heart valve. Methods of loading a delivery device and delivering an implant are also disclosed.

The invention provides a nicking guide wire, a nicking balloon assembly and an intervention device. The nicking guide wire comprises a guide wire shaft and a cutting unit. The cutting unit has an expansion state and a compression state, the far end of the cutting unit is fixed to the guide wire shaft, and the near end of the cutting unit is of an expandable annular structure. The nick guide wire is configured such that when the nick guide wire cooperates with the balloon catheter, at least part of the distal end of the balloon catheter enters the interior of the cutting unit through the annular structure. The indented guide wire is provided with the cutting unit, the cutting unit is combined with a balloon catheter to achieve the balloon cutting function, due to the fact that the indented guide wire is separated from a balloon body, the trafficability and flexibility of the product are better than those of products such as a cutting balloon, and when the indented guide wire is applied to treatment of intracranial vessel moderate calcification lesions, blood vessel injuries are not likely to be caused; and operative complications are reduced. For serious calcification lesions of cardiovascular and peripheral blood vessels, plaque expansion can be achieved without additionally using a CTO balloon for pre-expansion, and the operation cost and the operation difficulty are reduced.

The utility model provides a first suturing instrument and a suturing system.The first suturing instrument comprises a conveying catheter, a fixing piece, a push rod, a puncture needle and an anchoring piece, the fixing piece is connected to the far end of the conveying catheter, an opening and closing arm used for bearing tissue is installed on the fixing piece, and a needle outlet hole used for the puncture needle to penetrate out is formed in the fixing piece; a first hole for a puncture needle to penetrate through is formed in the opening and closing arm; the push rod is arranged in the conveying catheter, is connected with the opening and closing arm and is used for opening or closing the opening and closing arm; the puncture needle is arranged in the conveying catheter; the anchoring piece is arranged at the far end of the puncture needle or connected with the far end of the puncture needle, and a suture is fixedly connected into the anchoring piece. According to the suture instrument, by arranging the conveying catheter, the fixing piece, the push rod, the puncture needle and the anchoring piece connected with the suture, the suture can be easily anchored to the tissue, and the technical problem that the suture instrument cannot anchor the suture to the tissue easily is solved.

The invention relates to the technical field of medical instruments, and discloses a multidirectional multiple rotatable bending-adjustable heart valve delivery system which comprises a delivery handle, a bending-adjustable handle, a balloon tube and a bending-adjustable sheathing canal, and the bending-adjustable handle is arranged at the near end of the delivery handle; the near end of the balloon tube is arranged in the conveying handle, and a balloon is arranged at the far end of the balloon tube; the bending-adjusting sheathing canal is arranged in the balloon tube, and the near end of the bending-adjusting sheathing canal is connected with the bending-adjusting handle; at least two independent cavities are formed in the bending adjusting sheathing canal, and each cavity accommodates one bending adjusting wire; wherein the bending adjusting handle is provided with bending adjusting pieces, the number of the bending adjusting pieces is consistent with that of the bending adjusting wires, the far ends of the bending adjusting wires are fixed to the far ends of the independent cavities, and the near ends of the bending adjusting wires are connected to the bending adjusting pieces. Accurate bending adjustment and flexible control in the artificial valve conveying process are achieved.

The invention relates to a conveyor and a conveying system.The conveyor comprises an inner sheath core, an outer sheath core, an outer sheath tube, a conveying handle, a restraining piece and a fixing anchor which are sequentially connected in a sleeved mode, and the near end of the inner sheath core, the near end of the outer sheath core and the near end of the outer sheath tube are all connected with the conveying handle so that the inner sheath core, the outer sheath core and the outer sheath tube can axially and relatively move under adjustment of the conveying handle; the restraining piece is fixed to the far end of the inner sheath core, and the fixing anchor is connected with the far end of the outer sheath core so that at least part of the restraining piece can be inserted into the restraining piece when the inner sheath core and the outer sheath core move relative to each other in the axial direction. The fixing anchor comprises a main body part and a plurality of anchor hooks, and limiting grooves are formed in the positions, on the near-end sides of the anchor hooks, of the outer wall of the main body part. According to the conveyor, before the bare stent is separated from the anchor hook, the wave rod of the bare stent is radially compressed through the restraining piece in the relative axial movement process of the inner sheath core and the outer sheath core, so that the wave rod can be contained in the limiting groove again, the main body stent connected with the wave rod is driven to be radially compressed, and in the release debugging process, the main body stent can be released. The shape and the position of the covered stent can be adjusted.

This invention discloses an adjustable bending catheter, relating to the field of interventional medical device technology. It includes an inner tube, an outer tube, an adjusting support tube, and a handle. The inner tube includes a distally located curved section capable of bidirectional bending. A distally located internal control bending section extends outward from the outer tube. The outer tube is anchored via an anchoring structure. The distal end of the adjusting support tube is connected to the internal control bending section, and the distal end of the outer tube is fixed to the adjusting support tube. The elastic modulus of the adjusting support tube is less than that of the inner tube. The handle is equipped with an inner tube pushing component. When the outer tube is anchored to the inner wall of the blood vessel, an axial force is applied to the inner tube through the inner tube pushing component. The internal control bending section bends under the combined action of the axial force and the supporting force applied by the adjusting support tube. The distal end of the inner tube can achieve a large-angle bend. Combined with the overall rotation of the inner and outer tubes, the distal end of the inner tube can rotate in three-dimensional space, enabling the adjustable bending catheter to bend in any direction, thus facilitating passage through tortuous blood vessels.

The application discloses a valve cutting device. The valve cutting device comprises a catching catheter and a cutting member. The catching catheter comprises a tube body, the tube body comprises a main body section and an adjustable bending section arranged at the distal end of the main body section. The adjustable bending section has a bending state, in which the adjustable bending section forms a hook structure. The cutting member is in a linear structure. The cutting member extends along the main body section, the distal end of the cutting member is arranged to pass through the tube wall at the distal end of the main body section and is fixedly connected with the distal end of the adjustable bending section. The part of the cutting member located outside the tube body is an active section, the active section moves synchronously with the adjustable bending section. The active section comprises a cutting part, the cutting part is located at the concave side of the adjustable bending section in the bending state. The valve cutting device of the application has the advantages that the cutting member is arranged on the catching catheter, only one catheter is needed to realize the catching and cutting of the valve leaf, the structure is simple, the surgical procedure is simplified, and the damage to the patient can be reduced.

Provided is an extension catheter excellent in strength for fixing a linear member to a cylindrical member. The extension catheter according to the present invention is inserted into a catheter and can be protruded from an opening on a distal side of the catheter. The extension catheter comprises a cylindrical member and a linear member with a distal end portion thereof fixed to the cylindrical member. The cylindrical member comprises an inner layer containing a fluororesin and a proximal end portion located closer to a proximal side than a proximal end of the inner layer. The linear member is fixed to the cylindrical member at least inside the proximal end portion.

The application relates to the technical field of basket catheter, in particular to a basket catheter system and a basket catheter calibration method. The basket catheter system comprises a basket catheter, an operating handle, a tube body and a basket electrode assembly, the basket electrode assembly comprises a spline, a proximal end fixing seat and a distal end fixing seat, and the basket catheter system further comprises a proximal end position sensor and a distal end position sensor arranged on the proximal end fixing seat and the distal end fixing seat respectively; the basket catheter system further comprises a processing device, the proximal end position sensor and the distal end position sensor are connected with the basket catheter, and the processing device is used for obtaining a contact force of the basket electrode assembly and target tissue according to a proximal-distal end spacing change amount, a corresponding relationship between a known axial force value of the basket electrode assembly and the proximal-distal end spacing change amount and a contact angle of the basket electrode assembly and the target tissue. The application mainly solves the technical problem of how to detect the contact force of the basket catheter and the target tissue.

Provided is an extension catheter easy to insert into a tube inside a body. This extension catheter is inserted into a catheter and can protrude from a distal-side opening of the catheter. The extension catheter comprises a tubular member and a linear member having a distal end portion fixed to the tubular member. The tubular member includes a first resin having a portion located outside of the linear member in the radial direction and a second resin having a lower Shore D hardness than the first resin. A cross section of the tubular member in the radial direction has three regions obtained by equally dividing the tubular member in a direction passing through the centroid of the linear member and the centroid of the lumen of the tubular member, and designated as a first region, a second region, and a third region in order of increasing distance from the linear member. The first resin is positioned in the first region or in the first region and the second region, and the second resin is positioned at least in the third region. The first resin has a first exposed surface exposed on the outer surface of the tubular member.

A medical device comprises a distal articulating member and a first jaw and a second jaw, each connected to the distal articulating member. A shaped fiber carrier is pivotally connected to the distal articulating member and defines a shaped fiber lumen. The medical device includes a shaped fiber with a distal end fixedly connected to the shaped fiber lumen. The shaped fiber carrier is indirectly connected to the first jaw and the second jaw, and movement of the shaped fiber carrier causes the shaped fiber to generate a signal related to the movement of the first and / or second jaw.

A holder for an annuloplasty ring that detaches with one cut. The annuloplasty ring mounts around a periphery of the holder without the use of connecting sutures. The holder has a proximal plate defining a lip on one side of the ring, and a distal retainer that defines a second lip on the other side, the two lips retaining the ring around the holder periphery. The distal retainer is formed by two hinged wings. A truss suture maintains the holder in a trussed configuration while the annuloplasty ring is delivered and secured to the implantation site. Once the ring is secured at the annulus, the truss suture is severed with one cut, enabling the hinged wings to pivot and the holder to be pulled free of the ring.

The invention discloses an external fixing device for bone defect repair, which belongs to the technical field of medical instruments and comprises a near-end fixing ring unit and a far-end fixing ring unit which are connected into a whole through a plurality of adjustable connecting rod units, and the adjustable connecting rod units are used for adjusting the distance between the near-end fixing ring unit and the far-end fixing ring unit. According to the invention, the large-range coarse adjustment of the bone fracture end distance can be quickly realized, and the initial fixing requirements of different bone defect lengths can be met.

The invention belongs to the technical field of medical orthopedic rehabilitation, and discloses an electronic prescription generation method and device for a Taylor space scaffold, and the method comprises the steps: obtaining image data of an affected limb with the Taylor space scaffold; performing modeling segmentation to obtain a far-end broken bone model, a near-end broken bone model and a Taylor space stent model; acquiring the length of each extension rod in the current state, namely the original length; binding the near-end fixing ring model with the near-end broken bone model, and binding the far-end fixing ring model with the far-end broken bone model; virtual restoration between the near-end broken bone model and the far-end broken bone model is achieved, and the length, namely the target length, of each extension rod in the restoration state is obtained; and generating the electronic prescription based on the original length and the target length of each extension rod. According to the method, accurate calculation of the target adjusting amount of each extension rod in the Taylor space stent can be realized without depending on parameters of the stent and malformation parameters of fracture, and the treatment effect is ensured.

A delivery system for an intracorporeal device includes a sheath defining one or more lumens shaped to receive a delivery catheter or shaft and a guidewire. The system may include a delivery shaft having a distal coupling feature adapted to releasably couple with a proximal coupling feature of the intracorporeal device. The delivery system may further include a hub through which the delivery shaft and guidewire are passed. The delivery shaft may be coupled to a feature, such as a knob, that enables manipulation of the delivery shaft to decouple the distal fixation feature from the proximal fixation feature of the intracorporeal device in order to deploy the intracorporeal device within a patient.

The application relates to a balloon catheter, characterized in that the balloon catheter comprises a balloon, a catheter, a terminal tube, a developing ring, a catheter seat, a stress tube and a catheter sleeve, the catheter comprises an inner tube and an outer tube, the outer tube is sleeved outside the inner tube, the distal end of the inner tube is connected with the proximal end of the terminal tube, the distal end of the balloon is fixed on the outer surface of the terminal tube and / or the inner tube, the proximal end of the balloon is fixed on the outer surface of the distal end of the outer tube, the developing ring is arranged on the inner tube in the balloon, the stress tube is fixed on the distal end of the catheter seat, the proximal end of the inner tube is fixed inside the proximal end of the catheter seat through the stress tube and the catheter seat, the proximal end of the outer tube is fixed inside the distal end of the catheter seat through the stress tube and the catheter seat, and the catheter sleeve is sleeved outside the balloon. The balloon catheter can effectively treat arterial or venous stenosis and the like.

A single delivery needle configuration accommodates multiple soft tissue fixation devices at once. The configuration eliminates the need to reload a fixation delivery device when multiple fixation devices are required. Further, this configuration can include different variations of fixation devices. In embodiments, these fixation devices are typically manufactured from standard braided polyester suture that is cut into segments with predetermined lengths. This design allows the braided suture segments to be preloaded with a suture threaded through the preloaded braided suture segments with a slip knot placed on the proximal end of a first braided suture segments (e.g., distal fixation device). The tailing suture from the slip knot passes through the second, third, fourth braided suture segments, or any required quantity of braided suture segments that have been preloaded into the delivery device. The suture passes completely through a delivery device.

A medical device, and methods of manufacturing the same, including a fixation element having varied cross-sectional dimension. The device including a body portion and the fixation element coupled to a distal body end and extending therefrom. The fixation element is configured to affix the body portion to a wall of a heart. The fixation element defines a helical shape extending between a distal fixation end and a proximal fixation end along a direction of a helical axis. The fixation element defines a proximal fixation section proximate the proximal fixation end, a distal fixation section proximate the distal fixation end, and a middle fixation section located between the proximal and distal fixation sections. A cross-sectional dimension of the middle fixation section is smaller than a cross-sectional dimension of the proximal fixation section.

The present invention provides a medical device for forming an opening channel or access passage between body tubular lumens. [Solution] The present invention relates to a device that uses an elongated body, a proximal holding portion, and a distal holding portion to bring the muscle layers of a first body lumen and a second body lumen into contact and to form a long-term or permanent opening or access channel between them. The medical device comprises an elongated body that forms a lumen and includes a proximal portion, a distal portion, a certain length, and a certain diameter, wherein the elongated body 310 may have an elongated tubular form (e.g., a restrained form, an unexpanded form, or a transport form) and a retracted form (e.g., an unrestrained form, an expanded form, or an unfolded form) in which the proximal portion 312 expands radially into the proximal holding portion 314 and the distal holding portion 322 expands radially into the distal holding portion 324, with a cylindrical saddle portion 328 extending between them.

The invention relates to a thrombus extraction stent and a thrombus extraction system.The thrombus extraction stent comprises a thrombus separation assembly and a thrombus capturing assembly, the thrombus separation assembly comprises a stripping net and at least two anchor rods, each anchor rod comprises a fixed end and a free end, the fixed end is fixedly connected with the far end of the stripping net, and the free end extends towards the near end relative to the fixed end; the thrombus capturing assembly comprises a net-shaped collecting bin, the collecting bin comprises a first woven mesh basket, a contraction section and a second woven mesh basket, the first woven mesh basket can move towards the far end to be contained in the second woven mesh basket, so that the contraction section is bent to form an anchoring part, and the anchoring part is used for allowing the free end of an anchor rod to penetrate through; therefore, the stripping net is detachably connected with the anchoring part through the anchor rod. According to the thrombus extraction stent and the thrombus extraction system, the difficulty of cleaning thrombus in the thrombus extraction stent can be reduced, so that the efficiency of cleaning the thrombus in the thrombus extraction stent is improved.

A delivery system for an intracorporeal device includes a sheath defining one or more lumens shaped to receive a delivery catheter or shaft and a guidewire. The system may include a delivery shaft having a distal coupling feature adapted to releasably couple with a proximal coupling feature of the intracorporeal device. The delivery system may further include a hub through which the delivery shaft and guidewire are passed. The delivery shaft may be coupled to a feature, such as a knob, that enables manipulation of the delivery shaft to decouple the distal fixation feature from the proximal fixation feature of the intracorporeal device in order to deploy the intracorporeal device within a patient.

This utility model discloses a multi-functional electrosurgical unit with adjustable length and water injection capability. The distal end of the delivery tube is fixedly connected to the I-blade body via a connecting tube, and the proximal end of the delivery tube is fixed to the main handle. The proximal end of the O-blade body is fixedly connected to the distal end of the inner sheath tube, which is sleeved outside the delivery tube. The proximal end of the inner sheath tube is fixedly connected to the inner sheath handle, and the outer sheath tube is sleeved outside the inner sheath tube. The distal end of the outer sheath tube is limited by a ceramic head, and the proximal end of the outer sheath tube is fixedly connected to the outer sheath handle. The relative positions of the outer sheath handle and the main handle can be moved to adjust the overall blade extension length. The relative positions of the inner and outer sheath handles can also be moved to switch between the O-blade and I-blade functions. This solution can meet the surgeon's needs for different electrosurgical unit lengths during surgery and provide multiple functions in a single electrosurgical unit.

The present invention provides a balloon catheter and a preparation method thereof. The balloon catheter includes a distal tube, an inner lumen tube, a balloon body and an outer tube, wherein: the distal tube includes a distal end portion and a connecting portion connected axially, the distal end portion is located at the distal end of the connecting portion, the distal tube includes a housing and a support layer, the housing extends at least from the distal end portion to the connecting portion, the support layer is at least partially located at the connecting portion and the support layer is located inside the housing; the inner lumen tube penetrates through the balloon body and is connected to the proximal end of the distal tube; the distal end of the balloon body is fixed at the connection between the inner lumen tube and the distal tube, on the distal tube or on the inner lumen tube, and the proximal end of the balloon body is connected to the distal end of the outer tube. The distal outer diameter of the distal tube of the balloon catheter of the present invention is small, a support layer is added in the distal tube, and it is not easily deformed, which can improve the passing ability of the balloon catheter during the operation of treating intracranial vascular stenosis and the ability to enter the lesion location.

Provided is an extension catheter having a tubular portion thereof that is unlikely to be deformed into a distorted shape even when inserted into a curved portion inside a body. The extension catheter can be inserted into a catheter and protrude from a distal-side opening of the catheter, the extension catheter having a tubular member and a linear member having a distal end thereof fixed to the tubular member. The tubular member has a tubular portion and a tapered portion located more on the proximal-side than the tubular portion. The tubular member has a braided tube at least in the tubular portion. An opening-containing surface of the braided tube that includes a proximal-side opening is inclined. A proximal end of the opening-containing surface is closer to the linear member than a distal end of the opening-containing surface in the radial direction of the braided tube.

The present inventive subject matter is a bone fixation device where the distal end of the bone fixation device is affixed to the digit of a hand and the proximal end of the bone fixation device is connected to the a bone in the arm. There is a middle section between the proximal section and the distal section.

Disclosed is a thrombus extraction device (1) comprising: a rotating body (2) formed by a plurality of first longitudinal struts (20), wherein the first longitudinal struts (20) are fixed only at a proximal end (21) and a distal end (22), and the rotating body (2) is in an expanded configuration when the rotating body is in a free state, and is in a contracted configuration when the rotating body is inserted into a catheter; a distal body (3) connected to the distal end (22) of the rotating body (2), the distal body is in an expanded configuration when the distal body is in a free state, and is in a contracted configuration when the distal body is inserted into a catheter; wherein at least a portion of each first longitudinal strut (20) is radially expanded and circumferentially rotated during the unfolding stage of the rotating body (2) from the contracted configuration to the expanded configuration.