123 results about "Ligature" patented technology

A tube for implantation into the eye for replacement conduction of aqueous humor from the chambers of the eyeball to the subconjunctival tissue and ultimately to the venous system is comprised of an elongated fluid conducting conduit having distal and proximate ends, a sidewall and an interior passageway and at least one longitudinally extending opening in the sidewall that exposes the interior passageway and at least one nidi-forming structure carried by the conduit and extending laterally therefrom to implement the formation of at least one aqueous filtration bleb in the tissue of the eyeball. In one embodiment, the tube also contains at least one releasable ligature circumscribing the conduit. In another embodiment, the tube also contains an anchor appended to the conduit to prevent it from migrating from its placement site.

The invention concerns an orthodontic treatment using brackets bonded via their base onto each tooth of a dental arch, each bracket having a slot into which a first orthodontic arch wire is introduced so as to cause to move, the first orthodontic arch wire being held in slots of the brackets by ligatures, wherein the first orthodontic arch wire that remains in the mouth is introduced into the slots of the brackets; after the first orthodontic arch wire, a second orthodontic arch wire is placed on top; the ligatures are tightened so as to shape the ligatures and press the two arch wires against the bottom of the slots in the brackets, and once the ligatures have been tightened and shaped, the second provisional orthodontic arch wire is removed so as to obtain loose ligatures having a constant play with the first orthodontic arch wire.

The invention discloses a blood vessel ligaturing belt with good biocompatibility, which can not only be used for the blood vessel ligature of deep tissues or during an operation under an endoscope with the aid of a gun-typed blood vessel ligator, but also directly used for the blood vessel ligature of superficial tissues with open wound surfaces. The blood vessel ligaturing belt is made of a most novel composite plastic that can be embedded into human bodies, has good biocompatibility, non-corrosion, antimagnetic and comparative strength with titanium metal, does not develop under X rays, can be left in human bodies for lifelong, has low price and simple operation when in use, saves operation time, reduces the risk of recurrent blood vessel bleeding again, and can remarkably lower operation cost.

An implantable shunt for the repair of a blood vessel, which is capable of remaining in place temporarily or for extended periods, which comprises a hollow tube, and flanges positioned at regular intervals along the tube's length, ending at both ends. The shunt is made of non-coagulative material. In operation, damaged vessels are severed and bridged by this implantable shunt, which is secured in place inside a vessel by applying ligatures to flanges on its end.

The invention relates to a medical instrument, which comprises a handle and a working head connected with the handle, wherein the working head comprises a first rod body part, a second rod body part and a percussion force application member, a forceps bin assembly is arranged on the second rod body part, one end of the first rod body part is arranged on the handle, the other end of the first rod body part is detachably connected with the second rod body part, the first rod body part comprises a first percussion rod, the second rod body part comprises a second percussion rod connected with theforceps bin assembly, and the first percussion rod is used for carrying out percussion driving on the second percussion rod to push the forceps bin assembly so as to ligature target tissue. Accordingto the invention, the first rod body part and the second rod body part are detachably connected, so that after the ligature clamp in the forceps bin assembly arranged on the second rod body part is used up, the new forceps bin assembly is replaced to achieve repeated use of the first rod body part and the handle, and the effect of saving cost is achieved; and a plurality of ligature clamps can beplaced in the forceps bin assembly, so that the problems that the existing instrument cannot achieve ligature clamp continuous emission to cause inconvenient use, surgical risk increasing and the likeare solved.

In order to maximise the pivoting range of the arms in a surgical instrument for the placement of C-shaped ligature clips having two legs connected to one another by means of a bridge section with two clamping jaws, which in an open position receive an open ligature clip between them and are movable into a closed position by approaching one another and in so doing close the ligature clips by their legs approaching one another, with two elastically deformable arms, each bearing a clamping jaw at its distal end, and with a slide, which is displaceable relative to the arms in the longitudinal direction thereof, and which abuts against the abutment surfaces of the arms and as a result of this abutment against the abutment surfaces elastically pivots the arms relative to one another in a pivoting plane out of a starting position into an end position upon displacement of the slide relative to the arms, in association with a small size of the instrument, it is proposed that at least over a part of their length and at least over a part of their width the two arms are arranged in planes running parallel to the pivoting plane and displaced relative to one another and overlap one another at least partially.

The invention provides a ligature clip with a shape memory function, and relates to the technical field of auxiliary medical instruments. The ligature clip comprises a clip body made of a bidirectional shape memory polymer, and the clip body has an initial shape and a temporary shape; the clamp body is suitable for being implanted into a tissue to be sealed and bound in a temporary shape and then responding to external condition stimulation to form the initial shape, and the initial shape is suitable for being wound on the tissue and applying compression force to the tissue to block blood flow. The ligature clip made of the bidirectional shape memory polymer can be reversibly transformed between the initial shape and the temporary shape for multiple times after one-time shaping, the deformation amount can be controlled according to actual requirements in the deformation process, then the compression force applied to a blood vessel is adjusted to control the closing degree of the blood vessel, and therefore the flow of blood passing through the ligature clip is controlled, and some special operation requirements are met. In addition, based on control over the deformation process, the clamping force on the blood vessel can be improved, and an anti-slipping effect is enhanced.

The invention discloses a novel multipurpose loop ligature device. The novel multipurpose loop ligature device comprises a medical surgery silk thread and a gun body, and further comprises a draft device, an operating device and a tightening device, the medical surgery silk thread is knitted into double single knots to form a tightening coil and a loop ligature coil, the cross part of the tightening coil and the loop ligature coil is a tightening knot, and the overall medical surgery silk thread is in a stress state; the gun body is of a cavity structure, and is provided with a vent hole switch and a negative pressure connector which are communicated with the cavity, the vent hole switch is located on a holding handle of the gun body, the negative pressure connector is located at the lower end of the holding handle of the gun body, the inside of the gun body is fixedly connected with the draft device, and the outside of the gun body is movably connected with the operating device through a U-shaped limiting connecting piece. The medical surgery silk thread is still selected and utilized in a loop ligature material, the materials are totally differently from rubber gasket types of materials (including elastic threads), the situation that silk threads which are adopted in manual ligation reoccurs, and the potential safety hazard that massive haemorrhage occurs at a residual end caused when the rubber gaskets are aged and slip off in advance is avoided.

The invention discloses a clip bin as well as a clip push plate and a clip applier used in a matched way. The clip bin is used for containing a ligature clip and comprises a bin body; the bin body is provided with a bin cavity for containing the ligature clip; the bottom wall, forming the bin cavity, of the bin body is provided with at least two blocking parts which protrude out of the bottom wall, have elasticity and are arranged in the length direction of the bin cavity; and the blocking parts are suitable for abutting against the rear portion of the corresponding ligature clamp arranged in the bin cavity so as to prevent the ligature clamp from moving backwards in the length direction of the bin cavity and deforming in the direction of the bottom wall when the ligature clamp moves forwards in the length direction of the bin cavity to make contact with the blocking parts so as to enable the ligature clamp to pass through the blocking parts. The convenience is provided for the clip applier to realize continuous application of the ligature clip, and the phenomenon that the ligature clip retracts is avoided.

The invention relates to a reamer for a loop ligature rubber ring, comprising a tip part, a middle part and a connecting part. The middle part is connected with the tip part and has a gradually increased cross section radius, and the connecting part is used for matching a sucker. The reamer for the loop ligature rubber ring is characterized in that at least three main supporting ribs are arranged and uniformly distributed on the outer surface of the middle part along the axis direction, and auxiliary supporting ribs can be arranged at both sides of each main supporting rib. By arranging the main supporting ribs, the friction force between the rubber ring and the reamer is effectively reduced so that a medical staff can save time and labor when arranging the rubber ring on the middle part by utilizing the reamer, and the rubber ring and gloves are prevented from winding when the rubber ring is manually arranged. The reamer for the loop ligature rubber ring is also provided with an extending part which is connected with the main supporting ribs and the auxiliary supporting ribs and arranged above the connecting part to effectively prevent the rubber ring from falling into a gap between the reamer and the middle part.

A strainer for a ligature resistant floor drain and a ligature resistant floor drain incorporating a strainer. The strainer includes a top plate with two sets of openings forming rings. A cylindrical extension extends from the top plate at a location between the rings. Also provided are two series of webs, each web of which is located between an adjacent pair of openings in one of the rings. Optionally, a strainer plate is attached to the cylindrical extension and extends at least one of radially inward and outward relative from the cylindrical extension. The floor drain further includes a strainer frame having a receptacle into which the strainer is received.

An umbilical cord ligature device comprising a flexible latex ligature that is pre-assembled on a semi-rigid plastic ring. The umbilical cord is slipped through the device to a point close to the baby's abdominal wall, and with a twist of fingers, the latex ligature is then released from the ring over the umbilical cord, where it stays compressing the cord until it dehydrates and falls off. The pressure that the ligature exerts around the umbilical cord during its dehydration period makes hemorrhages virtually impossible.

The invention discloses a continuous clip applying instrument with a detachable ligation clip assembly, and belongs to the field of surgical ligation instruments. The continuous clip applying instrument comprises an instrument body and a clip bin assembly, the instrument body comprises a handle assembly, a forceps rod assembly installed on the handle assembly and a forceps head assembly installed at one end of the forceps rod assembly, a clip bin installation cavity is formed in the forceps rod assembly, and a detachable clip bin assembly is arranged in the clip bin installation cavity. The clamp pushing opening in one side of the clamp bin shell of the clamp bin assembly is matched with the clamp pushing mechanism in the forceps rod assembly, the ligature clamps in the clamp bin assembly are continuously pushed out of the forceps rod, the clamp bin assembly is detachable, supplementation of the ligature clamps in an operation is facilitated, the structural design is simple, and the manufacturing cost is low. Besides, the window is arranged on one side of the clip bin shell, the number and the state of the ligature clips in the clip bin shell can be observed and recognized through the transparent clip bin cover, the quality defect of the clip bin assembly is avoided, and the surgical risk is reduced.

The invention discloses an elastic loop anus loop ligature instrument which comprises an inner sleeve, an outer sleeve and at least one group of thread push tube components, wherein the inner sleeve is provided with a vacuum pipe; an inner launching sleeve which communicates with the vacuum pipe to suck lesion tissue is fixedly arranged at the front end of the inner sleeve; at least one containinggroove which is distributed along an axial direction to contain elastic loops is formed in the outer periphery of the inner launching sleeve; the outer periphery of the inner sleeve is sleeved by theouter sleeve; the outer sleeve is propped against a wrench which is rotationally mounted on a shell to move relative to the inner sleeve under the action of the wrench; an outer launching sleeve which is arranged at the outer periphery of the inner launching sleeve in a sleeving manner to push all elastic loops to move forwards in a direction close to lesion tissue till sucked lesion tissue is sleeved by elastic loops in containing grooves close to the lesion tissue is fixedly arranged at the front end of the outer sleeve; and the thread push tube components are detachably and fixedly arranged at the outer circumference of the outer sleeve, are correspondingly connected with the elastic loops sleeved by the containing grooves, and are used for withdrawing corresponding elastic loops to tie and bundle the lesion tissue after the lesion tissue is sleeved by the elastic loops. The elastic loop anus loop ligature instrument is convenient to operate since only the wrench needs to be shifted in an operation.

A surgical device and tool for use in stabilizing tissue, such as an organ relative to a clamp, the surgical device having an elongate rigid member with a proximal end of the device having a stabilizing structure that rests against the skin of the subject and includes a vessel guide for guiding a blood vessel attached to the organ or tissue, and a distal end that mounts on the clamp. The surgical tool includes the combination of a clamp and the above-mentioned surgical device, with the clamp hingedly mounted on the distal end of the device. The tool is used to stabilize an organ by placement of the stabilizing structure against the skin of the subject, guiding a blood vessel with the vessel hook, and clamping such vessel distal to the vessel guide. A ligature is then placed across the vessel between the vessel guide and the clamp.

The invention discloses a method and device for rod tube centering and guiding and lifting ring disconnecting and hanging in mechanical well repair operation. The device comprises a lifting ring disconnecting and hanging and rod tube centering mechanism and a driving device used for providing rotation power for the lifting ring disconnecting and hanging and rod tube centering mechanism. The driving device is arranged on a wellhead platform and installed on one side, in linkage with a stand pipe to be lifted, of a wellhead, the driving device is perpendicular to a ligature, and the driving device itself can rotate. The device is installed on the side face, in linkage with the rod tube to be centered, of the wellhead, in the working process, a mechanical arm rotates to the ligature to perform centering and guiding, and after centering, the mechanical arm leaves from the ligature to return to the original place and wait for an instruction. The method and device are suitable for centering stand pipe of the wellhead and disconnecting and hanging a lifting ring in the mechanical operation, and it is ensured that the stand pipe smoothly runs into a well. The method and device have the advantages of being large in centering distance, sparing sufficient space for a traveling system and being small in investment, convenient to operate and the like.

The invention discloses a loop ligature device under an endoscope. The loop ligature device under the endoscope comprises a loop ligature device body, a loop ligature device installation component anda loop ligature device releasing component, wherein the loop ligature device body is a rope belt with a locking structure; the loop ligature device installation component comprises a barrel and a loop ligature device fixing element, wherein the loop ligature device fixing element is used for fixing the loop ligature device body to the surface of the barrel; the loop ligature device releasing component comprises a traction element; the barrel is provided with a first end and a second end in an axial direction; compared with the second end, the first end is far away from the control end of thetraction element; the traction element is used for being connected with the loop ligature device body; and in addition, the traction element can drive the loop ligature device body to be retracted tothe center so as to be separated from the surface of the barrel. The loop ligature device under the endoscope adopts the rope belt with the locking structure, and therefore, a target object can be entangled.

Embodiments of the present invention encompass systems and methods for delivering ligatures to anatomical features of a patient. Exemplary ligature delivery systems for use in delivering a ligature to a left atrial appendage ligature include an elongate support mechanism having a proximal portion and a distal portion, a flexible hoop assembly, and a cinchable constriction member. The flexible hoop assembly can be coupled with the distal portion of the elongate support mechanism, and can include a support body coupled with a support frame. The support frame can be biased to hold the support body in a trailing configuration, whereby a free portion of the support body is disposed proximal to the distal portion of the elongate support mechanism. The support frame of the flexible hoop assembly can be coupled with the distal portion of the elongate support mechanism. The support body can be configured to support the cinchable constriction member and a loop of the left atrial appendage ligature.

The invention discloses a digital indirect bracket bonding method based on 3D printing. The digital indirect bracket bonding method includes the following steps of: obtaining a digital dentition modelof a patient; accurately positioning a bracket in three-dimensional design software, carrying out outputting and 3D printing of a three-dimensional dentition model with the bracket; manufacturing a transfer tray; and placing the transfer tray on the dental surface of the patient after the transfer tray is internally provided with a bracket and carrying out conventional bonding. When a bracket ofwhich the undercut is not removed is used, an undercut is easily generated on a film pressing type transfer tray; a dislocation force is generated when the transfer tray is removed, and consequently the bonding interface of the bracket is damaged, which causes bonding failures. The undercuts in the gingiva direction and the occlusal surface (or incisal edge) direction are removed so as to preventthe generation of undercuts which cause bonding failures. 1 / 2 of the brackets with undercuts below the ligature wing in the proximal and distal directions are retained, so that the brackets are prevented from falling off easily after being placed in the transfer tray. Due to the design of removing partial undercuts, the falling-off rate of the bracket after bonding is reduced; the bracket is prevented from falling off in clinical operation; and meanwhile, due to the adoption of a full-package transfer tray, the bonding transfer accuracy is guaranteed.

The invention discloses a loop ligature device and a loop ligature device assembly. The loop ligature device comprises a loop ligature device body, a traction piece, a cylinder and a loop sleeve piece, wherein the loop ligature device body has elasticity; the traction piece is used for pulling the loop ligature device body; the cylinder is provided with a first end and a second end in the axial direction, the first end is far away from a control end of the traction piece compared with the second end, and the loop ligature device body is arranged on the surface of the outer wall of the cylinder in a sleeving mode; and the loop sleeve piece is made of a conductive metal wire, and comprises a ring-shaped first loop sleeve part and a linear second loop sleeve part, the of the second loop sleeve part is provided with an insulating outer sleeve, the cylinder body is provided with a first working channel, and the first working channel is used for allowing the second loop sleeve part to penetrate through. According to the loop ligature device, loop ligature operation can be performed, and a loop ligature target object can be cut off.

The invention belongs to the technical field of medical auxiliary tools or equipment, and particularly relates to a manual prepuce elastic thread loop ligature anastomosis assembly. The assembly comprises a loop ligature anastomat and a connecting piece; the loop ligature anastomat comprises an anastomosis cylinder, a thread carrying cup arranged outside the anastomosis cylinder in a sleeving mode, a loop ligature ring arranged at the top end of the anastomosis cylinder, a thread pressing ring buckled at an opening in the upper end of the thread carrying cup, and a locking piece arranged at the lower end of the anastomosis cylinder; the connecting piece is used for connecting an elastic coil and the loop ligature anastomat; the front end of the connecting piece extends into a connecting port; and the front end of the connecting piece is connected to the elastic coil. The manual prepuce elastic thread loop ligature anastomosis assembly is suitable for a prepuce loop ligature operation,and is compact in structure and convenient to use. When the assembly is used, a patient does not feel uncomfortable, the postoperative foreign body sensation is weak, the fear of the patient, especially a low-age patient, can be effectively reduced, and the operation efficiency is improved. Meanwhile, the assembly can achieve manual flexible operation through a trigger structure, the loop ligaturestrength and the loop ligature speed can be freely controlled, and the flexibility is high.

The invention discloses a blood vessel ligation device with a repeating function. The device comprises a gun body, a ligature clamp storage device, an excitation device, a ligature clamp and a fixingclamp, wherein the ligature clamp storage device is arranged on the left side of the gun body; the excitation device is arranged in the gun body; the ligature clamp is stored in the ligature clamp storage device; the ligature clamp is excited by the excitation device; and the fixing clamp is arranged on the gun body. When bleeding is excessive and bleeding points are not easy to find, the goal ofrepeatedly, quickly and effectively ligating blood vessels and tissues can be achieved, hemostasis time is shortened, operative efficiency is improved, success rate of operation is increased, and lifesafety of a patient is maintained. In addition, hemostasis can be achieved quickly in minimally invasive surgery, the intuition of excessive bleeding under the visual angle of an endoscope is avoidedfor surgeons, psychological mood of surgeons is prevented from being affected, and adverse consequences to a surgery are avoided.

The invention relates to the technical field of medical instruments, in particular to an interventional left auricle ligator and a ligation system with the interventional left auricle ligator. The interventional left auricle ligator comprises a connecting pipe, a snare and a suture, the snare is a flexible ring with two built-in channels and is connected to a pipe opening in one end of the connecting pipe, an open seam connected with one channel is formed in the position, corresponding to the channel, of the inner side of the snare, and a deformable skeleton ring is embedded in the other channel of the snare. The suture penetrates through the two ends of the connecting pipe, a one-way knot is tied between the end of one end of the suture and the body of the connecting pipe to form a retractable ligature coil, the ligature coil is embedded in the corresponding channel from the open seam, the other end of the suture can be pulled outwards relative to the other end of the connecting pipe under the action of external force, and therefore the ligature coil is pulled out from the open seam and contracts. The interventional left auricle ligator has the advantages of being reasonable in structural design and capable of effectively conducting intracardiac ligature operation on a left auricle through percutaneous intervention.

The invention discloses a loop ligature device. The loop ligature device comprises a loop ligature device body, a traction piece, a cylinder and an endoscope, wherein the loop ligature device body is a rope belt with a locking structure; the traction piece is used for pulling the loop ligature device body; the cylinder is provided with a first end and a second end in the axial direction, the first end is far away from the control end of the traction piece compared with the second end, the cylinder is provided with a loop ligature device fixing piece, and the loop ligature device fixing piece is used for fixing the loop ligature device body to the surface of the inner wall of the first end of the cylinder; the endoscope is at least partially inserted into a cylinder body, and a first working channel is formed in the endoscope; and the traction piece is at least partially located in the first working channel. According to the loop ligature device, the traction piece is arranged in the working channel of the endoscope, so that the loop ligature device body can be effectively pulled by the whole loop ligature device without additionally arranging an auxiliary device, and the loop ligature device is simple in structure and easy to machine.

The invention relates to an anorectal loop ligature device with automatic line tightening and cutting functions. The anorectal loop ligature device comprises a handle, a percussion mechanism arrangedon the handle and a loop ligature mechanism detachably connected with the handle. The anorectal loop ligature device with the automatic line tightening and cutting-off functions adopts a detachable split structure, is more convenient to use, integrates the automatic line tightening and cutting-off functions, does not need to use other tools in the using process, and provides convenience for anorectal operation.

The invention relates to a neonatal umbilical cord sleeving method which comprises the following specific steps: step 1, selecting a cutting device with a proper model, and cleaning and disinfecting the cutting device for later use; 2, two umbilical cord clamps are prepared and assembled into a jaw of the clamping device, and an extrusion block used for extruding blood in the umbilical cord is arranged in the jaw; an inner groove is formed in the extrusion block, and the umbilical cord clamp is assembled in the inner groove; 3, selecting proper expansion forceps and an umbilical cord ligation ring, and cleaning and disinfecting the expansion forceps for later use; the umbilical cord ligature ring is simple in structure and convenient to use, the umbilical cord ligature ring is expanded through the expansion forceps, and the umbilical cord ligature ring is conveniently connected to the root of the umbilical cord of a baby in a sleeving mode and used for clamping the umbilical cord of the newborn; after sleeving is completed, the expansion forceps are loosened, the redundant umbilical cord is removed, and the umbilical cord clamp is taken off, so that the clamping hole of the ligation ring is used for clamping the umbilical cord; infants are prevented from being infected with bacteria in the growth process.

The invention discloses a hemorrhoids loop ligature device which comprises a handle, a suction tube, an endoscope, a loop ligature tube and a rubber ring, wherein one end of the suction tube is connected to the handle, the other end is connected to the loop ligature tube, a lens of the endoscope is located at the loop ligature tube, and a lead connected to the lens passes through an inner cavity of the suction tube and the handle and is then connected to a display screen; the first half part of the loop ligature tube is a hard loop ligature tube, and the second half part is an elastic rubber tube; and an elastic airbag tube is attached on the outer side of the loop ligature tube, the elastic airbag tube is connected to a gas source by a connecting conduit, and the rubber ring sleeves outside of the elastic airbag tube. The hemorrhoids loop ligature device is characterized in that a hemorrhoids affected focus can be accurately found through observation with the endoscope because of integration of the endoscope and a loop ligature device, then accurate loop ligature is realized with the loop ligature device, efficiency is high, treatment effects are good, and pains brought to a patient by such loop ligature can be relieved by a continuous loop ligature mode.