58 results about "Ligature" patented technology

A drain may include ligature resistant features to inhibit anchoring a ligature or string to or around the installed drain. A drain can include an inlet or upper opening, an outlet or lower opening, and a channel fluidly connecting the upper opening to the lower opening. The channel may be configured to prevent linear flow of fluid from the upper opening to the lower opening and to inhibit anchoring a ligature about any opening or portion of the drain.

The application discloses a clamp removing forceps and a jaw thereof, which is used for untying a ligature clamp, the ligature clamp comprising a first clamp arm and a second clamp arm connected by a rotating hinge, the first clamp arm being provided with a first protruding column, and the second clamp arm being provided with a second protruding column; the jaw comprising an upper jaw blade, a lower jaw blade and a pushing piece, the upper jaw blade and the lower jaw blade being openable and closable, the upper jaw blade and the lower jaw blade being respectively provided with a limiting groove and a limiting table, the limiting groove being used for positioning the first clamp arm and the second clamp arm when the ligature clamp is closed, and the pushing piece being used for pushing the ligature clamp when the ligature clamp is opened and for clamping the first protruding column and the second protruding column into the limiting table of the upper jaw blade and the limiting table of the lower jaw blade respectively. The jaw of the clamp removing forceps is provided with the limiting table and the limiting groove in the jaw blade, and the pushing piece is used for assisting, so that the operation difficulty and the damage risk of the ligature clamp are reduced.

The application discloses a deep intracranial tissue suturing and ligature instrument, which can realize suturing and ligature of deep human tissues (especially intracranial surgery). The instrument can realize suturing and ligature of deep tissues in minimally invasive treatment in clinical surgery, and can solve the problems of small operation space, difficult suturing and easy damage to surrounding tissues in traditional surgery. The operation includes two parts of suturing and steering, and the suturing operation is completed by two interchangeable needle holding levers. A universal joint device held by the rear lever can be adjusted in direction according to different requirements, and is used for coping with various complex situations.

The utility model provides a haemorrhoids loop ligature anastomat with a limiting structure, and belongs to the technical field of anastomats. The haemorrhoids loop ligature anastomat with the limiting structure comprises a haemorrhoids loop ligature anastomat part and a limiting assembly. The ligation tube part is mounted at the front end of the handle part; the top ends of the two arc-shaped clamping plates are both fixedly connected with lug plates, a rotating shaft is arranged between the two lug plates in a rotating mode, the rotating shaft is sleeved with a spring piece, the extending end of the spring piece makes contact with and abuts against the opposite faces of the two lug plates, and the two arc-shaped clamping plates are detachably arranged on the outer side of the ligation tube part in a clamped mode. Under the action of an arc-shaped clamping plate, an ear plate and a spring piece, the ligation tube part can be limited, so that an operator can find that the ligation tube part moves towards the interior of the anus or slides towards the exterior of the anus in time during operation, remedy can be carried out, and the error rate of an operation is reduced.

The invention discloses a high-strength self-lubricating three-layer nested medicine-carrying hollow cervical cerclage band with an auxiliary miscarriage prevention function and a preparation method of the cerclage band, and belongs to the technical field of medical instruments. Degradable polyester monofilaments are woven into a hollow round rope, and the hollow round rope and a medical curved needle are integrated; then carrying out polydopamine-polyethylene glycol double-layer modification on a copper-based metal organic framework (Cu-MOF), and loading active molecules; then mixing the drug-loaded Cu-MOF with collagen natural polymer sol, and uniformly filling the gel into the inner cavity of the round rope and forming a three-dimensional bracket through synchronous drawing type micro-perfusion and light-enzyme synergistic cross-linking; then constructing a transient hydrated lubricating layer on the surface; and finally carrying out ethylene oxide final sterilization to obtain a finished product. The cervical cerclage band device provided by the invention simultaneously provides degradable mechanical support, collagen scaffold induction and long-acting slow release regulation, has a low-friction implantation characteristic, and can be well used for preventing or treating middle and late abortion and premature delivery caused by cervical insufficiency.

The utility model relates to a ligation clamp with a double-clamping-arm structure, which comprises a ligation clamp body and an upper clamping arm and a lower clamping arm. The rear ends of the upper clamping arm and the lower clamping arm are hinged, and the front ends are locked by a locking structure; the side walls of the front parts of the upper clamping arm and the lower clamping arm are provided with clip applier grasping columns; a first groove which is concave upwards and extends in the front-back direction is formed in the middle of the clamping face of the upper clamping arm. And a second groove which is sunken downwards and extends in the front-back direction is formed in the middle of the clamping surface of the lower clamping arm. The U-shaped ligature clip has the advantages that the groove structure is additionally arranged on a traditional U-shaped ligature clip structure, an upper clamping arm structure and a lower clamping arm structure are further derived, the clamping closing effect that one-time clamping closing is equal to clamping closing of two ligature clips can be achieved through the upper clamping arm structure and the lower clamping arm structure, the problems of slipping and automatic bouncing after installation and closing are avoided, and the ligature clip is convenient to use. And meanwhile, the operation of secondary clamping closing is omitted.

The invention discloses a zebra fish optic nerve ligation model construction system and device, the system comprises an acquisition module, an anesthesia module, a placement platform and a ligation module, the acquisition module is used for acquiring target basic information; the anesthesia module is used for determining target anesthesia parameters according to the target basic information; performing anesthesia according to the target anesthesia parameters; the placing platform is used for placing target zebra fish; the ligation module is used for clamping sclera by using a sterile tissue clamping tool with a fine tip so as to expose optic nerves; the eyeball is lifted through a sterile tissue clamping tool, and supporting pieces are arranged on the two sides of the eyeball to expand the operation space; separating the optic nerve from the blood vessel of the eyeball through a separation tool; ligating the optic nerve through a ligature; and removing the supporting piece, and resetting the eyeball to obtain the zebra fish optic nerve ligation model. By adopting the embodiment of the invention, the zebrafish optic nerve injury and regeneration model for simulating the chronic inflammation environment can be constructed.

The invention relates to the field of minimally invasive surgical instruments in the anorectal department, and discloses a positioning and pushing device for internal hemorrhoid loop ligature in the anorectal department, the positioning and pushing device comprises a positioning seat, a pushing rod is movably mounted in the positioning seat, a movable ball seat is movably mounted at one end, away from the positioning seat, of the pushing rod, a connecting seat is fixedly mounted at the outer side end of the movable ball seat, and the connecting seat is fixedly connected with the positioning seat. A sleeve is fixedly installed at the outer side end of the connecting base, a pushing cylinder is movably installed on the outer diameter of the sleeve, a rubber ligation ring is arranged on the side, close to the pushing cylinder, of the outer diameter of the sleeve, a control chamber is fixedly installed at the end, close to the positioning base, of a pushing rod, and an upper first rope roller and a lower first rope roller are movably installed on one side of the interior of the control chamber. Through visual precise positioning, multi-dimensional angle adjustment, negative pressure adsorption fixation and one-key loop ligature design, operation is convenient and fast, trauma is small, the internal hemorrhoid basal part can be precisely ligatured, the operation efficiency and safety are improved, complications are reduced, and the patient experience is improved.

An arch bar system for maxillomandibular fixation is disclosed. A contourable, trim-to-fit bar includes a series of elongated oval apertures oriented substantially parallel to the bar axis. The apertures guide wire, coated suture, or other ligatures at varied approach angles, limit vertical clearance to resist slippage, and cooperate with intervening structural columns to distribute loads while the bar is cinched to teeth. Low-profile depending attachment features—cleats and / or J-hooks—project below the lower edge to receive interarch wire loops, guiding elastics, or other connectors. All patient-facing edges and transitions are radiused to minimize gingival and mucosal trauma. Bars may be metal or engineered polymer and segmentable for partial-arch use. Methods include threading ligatures through successive apertures to secure each bar and joining opposing bars at the depending features. Kits include paired bars, ligatures, interarch connectors, and tools.

The utility model discloses a molar mesial movement auxiliary device which comprises a main arch wire, a plurality of orthodontic brackets, an auxiliary arch wire, a ligature wire and an anchorage nail, the main arch wire penetrates through the orthodontic brackets and is fixed with the orthodontic brackets, two question mark hooks of the auxiliary arch wire are sleeved on the main arch wire, and the ligature wire is connected with the anchorage nail. The auxiliary arch wire is further provided with two small circles formed by bending, the small circle in the distal direction is rigidly connected to an anchorage nail planted on the alveolar bone through a fixing ligature wire, and the other small circle is free. According to the utility model, a stable rectangular structure can be formed, after force application, interference caused by lip and cheek movement or feeding is avoided, displacement is avoided, foreign body sensation is reduced, the bad effect of distal movement of anterior teeth and premolars can be avoided, friction force of tooth movement is not increased, and meanwhile, the structure is simple and convenient. And when the molars move forwards, the lip inclination acting force on the anterior teeth is also reduced.

A stent graft for treating an arterial aneurysm includes loops fixed to struts of stents, wherein the struts define distal and proximal apices. The ends of a ligature can be linked by a wire in a stent graft delivery system that threads anchor loops longitudinally spanning ends of the ligature to maintain the stent in a radially constricted position during delivery to the aneurysm. A delivery system and method for implanting a stent graft prosthesis includes and employs a torque component at a distal end of the stent graft prosthesis, whereby following advancement of the stent graft to a surgical site in a constrained or partially constrained configuration, torque is applied to the torque component to rotationally align the stent graft about a longitudinal axis of the stent graft, followed by deployment of the stent graft in correct rotational alignment. A delivery system and method of its use includes an apex capture assembly, a leg clasp, and a leg stop for capturing a stent graft during orientation and stabilization at an implantation site of a surgical site.

This invention relates to a sutureless vascular system, comprising a sutureless blood vessel, an artificial blood vessel, a locking ring, and a fixing ring. The artificial blood vessel is connected to either the locking ring or the fixing ring. The fixing ring and the locking ring are respectively positioned on the inner or outer side of the target blood vessel. The diameter of the locking ring can be increased or decreased to clamp the target blood vessel between the locking ring and the fixing ring. The sutureless vascular system of this invention has a simple overall structure. The operator only needs to align the target blood vessel with the fixing ring or the locking ring, and then tighten or expand the locking ring to complete the connection between the artificial blood vessel and the target blood vessel. The sutureless vascular system has high reliability, good sealing, and no blood leakage. It avoids the vascular torsion caused by the tightening process of the original ligature, which affects hemodynamics. At the same time, the overall operation is simple, the efficiency is significantly increased, and the operation time is effectively shortened.

An arch bar system for maxillomandibular fixation is disclosed. A contourable, trim-to-fit bar includes a series of elongated oval apertures oriented substantially parallel to the bar axis. The apertures guide wire, coated suture, or other ligatures at varied approach angles, limit vertical clearance to resist slippage, and cooperate with intervening structural columns to distribute loads while the bar is cinched to teeth. Low-profile depending attachment features—cleats and / or J-hooks—project below the lower edge to receive interarch wire loops, guiding elastics, or other connectors. All patient-facing edges and transitions are radiused to minimize gingival and mucosal trauma. Bars may be metal or engineered polymer and segmentable for partial-arch use. Methods include threading ligatures through successive apertures to secure each bar and joining opposing bars at the depending features. Kits include paired bars, ligatures, interarch connectors, and tools.

The utility model provides a varicosity minimally invasive hook-picking stripping ligation tool which comprises a side bending needle holding rod, a side bending needle is arranged at the end of the side bending needle holding rod, a stripper is arranged at one end of a double-end holding rod, and a hook needle is arranged at the other end of the double-end holding rod. According to the utility model, in one operation, a scalpel is used for cutting the skin with the width of about 2mm, so that blood vessels are prevented from being damaged due to excessive depth, then a side curved needle is used for inserting the needle from the incision end on one side, deeply bypassing the arteriovenous sheath from the bottom, a needle tip is used for withdrawing the needle from the other side end of the incision, the arteriovenous sheath is lifted, the stripping sub-end is used for passively stripping the arteriovenous sheath, and veins are exposed; the vein is lifted by the crochet needle, the artery and the concomitant nerves are avoided, the lateral curved needle is withdrawn, a line is disposed at a lateral curved needle hole, the line penetrates through a vein folding gap lifted by the crochet needle, the vein is ligated and is retracted subcutaneously, and the operation is completed. When the arteriovenous sheath is lifted by the lateral bending needle, the tissue can be fully exposed, pure stripping of the stripper is facilitated, and in the whole operation process, the operation efficiency is improved, tissue damage is reduced, and the operation risk is reduced.

The application discloses a ligature clamp, and relates to the technical field of medical devices, which comprises a first clamp arm and a second clamp arm, the length direction of both of which is respectively provided with an elastic connecting part and a locking unit at both ends; the opposite inner sides of the first clamp arm and the second clamp arm form a clamping surface for clamping a ligature tissue; the clamping surface is sequentially provided with an anti-falling locking area, a gradual transition area and a pressure reduction buffer area along the transverse width direction, the contact proportion of the surface microstructure of each area to the ligature tissue sequentially decreases, so that the ligature tissue is sequentially weakened in stress and is limited and clamped; the ligature clamp can realize gradual clamping, reduces local high pressure concentration while ensuring the stability of the ligature, and reduces the risk of excessive compression on blood vessels or soft tissues; and the technical problem that the existing ligature clamp lacks a gradual clamping process and excessive compression on blood vessels or soft tissues due to local high pressure concentration exists in the clamping process is solved.

A dental instrument includes a handle and an extension portion, the extension portion has a frontal protrusion that is used to hang an elastic traction ligature. An impacted tooth traction device includes a first bracket for being fastened to an impacted tooth, and a second bracket for being fastened to an anchor body, and the aforementioned elastic traction ligature that is used to connect the first bracket with the second bracket. A method for installing the impacted tooth traction device includes: fastening the first bracket to the impacted tooth, fastening the second bracket to the anchor body, and to connect the elastic traction ligature to the first and the second brackets after the elastic traction ligature is pulled to a certain length.

Disclosed herein are polymer ligature clip pincers and applier for applying polymer ligature clip pincers to tissue. More particularly, the polymer ligature clip pincers include first and second beams that are spaced apart, which can be coupled to one another and movable from an open position of reduced diameter that exerts minimal strain on the ligature clip pincers to a clamped position and to an applier for delivering such ligature clip pincers to a surgical site.

A stent graft delivery system and method for implanting a stent graft includes and employs at least one control rod that extends along a luminal wall of a stent graft and at least one ligature. The ligature extends about radial stents. Rotation of the control rod or a tube extending about the control rod wraps the ligature about the control rod, thereby radial constricting the stent about which the ligature extends.

The utility model relates to a ligation device for an endoscope, which comprises an outer tube, an inner tube capable of axially sliding in the outer tube is arranged in the outer tube, a first line tube and a second line tube are arranged in the inner tube, the front portions of the first line tube and the second line tube protrude out of the inner tube, and a traction line with a line holding ring at the front portion is installed in the first line tube. A ligature is installed in the second line pipe, and the front portion of the inner pipe extends out of the outer pipe and is sleeved with a rubber ring which can be separated from the inner pipe by pushing the outer pipe or the inner pipe. The ligation device for the endoscope is favorable for ligation of the root of a polyp under the endoscope, so that the polyp can be better cut.

The present disclosure relates to improved ligature devices and related methods of ligating animal parts. More specifically, a ligature device capable of maintaining a ligature band in an elongated position, applying a preformed ligation band to an object to be ligated, manually releasing the ligation band from an elongated position, and securing a ligation band in a tensioned position is described. The ligation device may be used to apply ligation bands to various body parts of various animals.

The invention provides a locking device for mounting a ligator under an endoscope, which comprises a handle shell, the handle shell comprises a first shell and a second shell, and the first shell and the second shell are clamped front and back to form the handle shell with a horizontal part and a handheld part; the number of the plug pin openings is two, the plug pin openings are symmetrically formed in the horizontal parts of the first shell and the second shell respectively, and the plug pin moves between the two plug pin openings; the disposable anorectal ligator is in butt joint with the handle shell of the electronic anorectal inspectoscope in a matched mode through a self-locking structure formed by matching the male head and the female head by adopting a front-back pushing plug pin type structure, and compared with a traditional method that after an inspection accessory such as the anorectal ligator is replaced, an assembly for fixing does not need to be replaced, and the operation is convenient. The equipment is simple in structure, locking and unlocking can be operated by a single hand as long as the equipment is pushed forwards and backwards, and the operation speed is high.

The invention discloses a ligature clip, which relates to the technical field of medical instruments and comprises a first clip arm and a second clip arm, and an elastic connecting part and a locking unit are respectively arranged at two ends in the length direction of the first clip arm and the second clip arm; the opposite inner sides of the first clamping arm and the second clamping arm form a clamping surface for clamping a to-be-ligated tissue; the clamping face is sequentially provided with an anti-disengaging locking area, a gradual transition area and a pressure reduction buffer area in the transverse width direction, the contact ratio of the surface microstructure of each area to the to-be-ligated tissue is sequentially decreased, and therefore limiting clamping with the stress sequentially decreased on the to-be-ligated tissue is formed. The ligature clamp can achieve gradual clamping, local high pressure concentration is reduced while ligature stability is guaranteed, and the risk of excessive compression on blood vessels or soft tissues is reduced; the technical problems that an existing ligature clamp lacks a progressive clamping process, and blood vessels or soft tissues are excessively pressed due to local high pressure concentration in the clamping process are solved.

The present invention is a surgical suturing device that assists in applying an open-looped, pre-knotted suture around a targeted area of application. The surgical suturing device contains a handle, a grasping mechanism, a clamp tube, a pusher tube, a cutter tube, and a pivot arm. A first coupler is positioned on the pivot arm. A second coupler is positioned at the end of the shaft, offset from the pivot arm. A suture knot is fitted over the second coupler, and a strand is connected to the first coupler. When activated, the pivot arm moves into a closed position, thereby encircling the suturing portion and joining the first coupler to the second coupler. Next, the suture knot is pushed forward off the second coupler and tightened up against the suturing portion. The pusher tube slides back, allowing the cutter tube to cut the excess suture cord.

The utility model belongs to the technical field of structural design of prepuce ligation devices, and particularly relates to an inner and outer ring assembly of a prepuce ligation device and a using method of the inner and outer ring assembly. Comprising an inner ring and an outer ring, the inner ring comprises a cylindrical mounting part, a spoon-shaped limiting part positioned at the top of the cylindrical mounting part, an annular locking part positioned at the top of the spoon-shaped limiting part, and two supporting plate surfaces positioned at the top of the annular locking part; the spoon-shaped limiting part is formed by vertically sectioning the cup-shaped rotary structure, and an extrusion opening is formed in the sectioning part of the spoon-shaped limiting part; an annular locking groove is formed in the outer wall of the annular locking part, and the upper side wall face and the lower side wall face of the annular locking groove protrude oppositely to form limiting rings. The two supporting plate faces are arranged on the top of the annular locking part in a bilateral symmetry mode and extend upwards. And the outer ring is sleeved on the surfaces of the two supporting plates. The device is used for dealing with the situation that part of prepuce is short or the expansibility is insufficient, and it is guaranteed that a patient can smoothly complete loop ligature butt joint and positioning under the situation.

1. The name of the design product: knot pusher. 2. The use of the design product: the knot pusher is used for pushing the ligature or tissue in the minimally invasive surgery of the spine. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: front view.

A ligation device capable of automatically cutting a ligature wire, the ligation device comprising a front handle (1), a rear-section handle (2), a catheter assembly, a snare (3) and a ligature wire (4), wherein one end of the catheter assembly is connected to the front handle (1), the snare (3) is arranged at the other end of the catheter assembly, and a slit is provided in the inner side of the snare (3); a ligature wire (4) passes through the front handle (1) and the catheter assembly; one end of the ligature wire (4) is connected to the rear-section handle (2), and the other end of the ligature wire (4) is a wire loop (41) that is retractable in the forward direction and stops in the reverse direction; the wire loop (41) is pre-assembled in the snare (3); a ligature wire cutting assembly is provided in the rear-section handle (2); and when the rear-section handle (2) is separated from the front handle (1) and is pulled backwards, the ligature wire (4) is pulled backwards, such that the wire loop (41) is pulled out of the slit to the inner side of the snare (3) and retracts, and when the ligature wire (4) is pulled backwards to reach a preset tension, the ligature wire cutting assembly automatically cuts the ligature wire (4). A ligation operation is achieved by means of pulling a rear-section handle (2) backwards, and automatic ligature wire cutting is performed at a preset node by means of the ligature wire cutting assembly during the operation process without needing to rely on the visual estimation and hand perception of an operating surgeon and thus the problem of manual operation failure or errors is avoided.

The subject of the application is a system for peri-orthodontic expansion of the alveolar process and bone regeneration and a mini-implant for attaching an orthodontic arch for use in peri-orthodontic expansion of the alveolar process and bone regeneration. The system is characterized in that it contains at least two orthodontic mini-implants and an orthodontic arch, and each mini-implant has an abutment (1) with conical or cylindrical threading, a polygonal neck (2), preferably hexagonal, an ending in the form of a rounded head (4) in the longitudinal cross-section in the shape of a mushroom with a narrowed shank (4T) round in the longitudinal cross-section, wherein in the neck (2) there are at least two through holes for attaching an orthodontic arch or in the form of a hook in the shape of a semicircle in the shape of the letter C, terminated at the top and bottom with two hook fasteners, one of which adheres to the neck (2) creating a place of connection with the arch,and preferably in the neck there is at least one hole for fastening various types of orthodontic elements or in the form of a lock in the form of open pliers ending with blades in the form of jaws, and in the front between the jaws there is a notch across the entire width of the pliers for inserting the orthodontic arch, and preferably between the neck and the arch there is a narrowing constituting a shaft with a rounded cross-section, wherein the mini-implant is connected to the orthodontic arch directly by means of an ending in the form of a lock or hook or in the case of a rounded head by means of two holes made in the neck (2), and furthermore in the case of connection by means of an incision in the jaws in the ending in the form of a lock, the connection is stabilized by connecting with a known means for stabilizing the attachment of the head to the arch, preferably a ligature.

This invention relates to a sutureless vascular system, comprising a sutureless blood vessel, an artificial blood vessel, a locking ring, and a fixing ring. The artificial blood vessel is connected to either the locking ring or the fixing ring. The fixing ring and the locking ring are respectively positioned on the inner or outer side of the target blood vessel. The diameter of the locking ring can be increased or decreased to clamp the target blood vessel between the locking ring and the fixing ring. The sutureless vascular system of this invention has a simple overall structure. The operator only needs to align the target blood vessel with the fixing ring or the locking ring, and then tighten or expand the locking ring to complete the connection between the artificial blood vessel and the target blood vessel. The sutureless vascular system has high reliability, good sealing, and no blood leakage. It avoids the vascular torsion caused by the tightening process of the original ligature, which affects hemodynamics. At the same time, the overall operation is simple, the efficiency is significantly increased, and the operation time is effectively shortened.

The utility model relates to a forceps head assembly and a clip applier, and belongs to the technical field of medical tools, the forceps head assembly comprises a first forceps head and a second forceps head which are connected through a pin shaft, the inner side of a forceps arm of the first forceps head is provided with a first groove for containing a ligature clip, and the second forceps head is provided with a second groove for containing a ligature clip. A first circular groove for containing the ligation clamp supporting lug is further formed in the side wall of the end of the first groove. Correspondingly, a second groove and a second circular groove are formed in the tong arm, facing the first tong head, of the second tong head. A plug is arranged at the root part of the clamp arm of the first clamp head, a slot is formed in the root part of the clamp arm of the second clamp head, and the plug can be inserted into the slot for closing and limiting. Due to the fact that the closing limiting structure is additionally arranged between the two forceps heads, it is guaranteed that the forceps heads do not deflect when closed, and it is guaranteed that the ligature clamp is closed accurately.