109 results about "Stapled anastomosis" patented technology

A high-performance near-pure zinc alloy, a preparation method therefor and a use thereof, relating to the technical field of zinc alloys. The alloy component is that the content of Zn is greater than or equal to 99.5%, and the remaining trace alloy elements include at least two of the following 14 elements: Mg, Mn, Li, Cu, Ag, Ca, Sr, Fe, Zr, Ti, Al, C, Ga, and Si. The alloy has the yield strength ≥ 250 MPa, the tensile strength ≥ 320 MPa, the elongation ≥ 25%, the mechanical property change during one year of room-temperature storage ≤ 5%, the maximum bending force ≥ 2 kN, the stress corrosion sensitivity factor ≤ 15%, the size of corrosion pits after 60 days of immersion ≤ 15 μm, and the standard deviation of the size of corrosion pits ≤ 3 μm. The alloy is suitable for the preparation of biodegradable stents, bone implant devices, medical staplers or anastomotic nails for intestines, blood vessels or nerves, vascular clamps, guided bone or tissue regeneration membranes, heart valve protheses, dura mater repair membranes, soluble bridge plugs and fracturing balls for oil drilling, zinc alloy die castings, electroplated zinc materials, building zinc materials, battery-grade zinc, printing-grade zinc, and zinc-based brazing alloys.

The utility model discloses a clamp type prepuce anastomat which comprises a first anastomosis semi-ring, a second anastomosis semi-ring, a first compression semi-ring, a second compression semi-ring and a cylindrical nail anvil. The anastomosis semi-ring I and the anastomosis semi-ring II are symmetrically distributed and are internally provided with semi-ring cutters, a plurality of anastomosis nails and a plurality of wedge-shaped driving mechanisms; a lower handle I is arranged at the rear end of the anastomosis semi-ring I, a lower handle II is arranged at the rear end of the anastomosis semi-ring II, and the lower handle I and the lower handle II are relatively rotatably connected and spliced into a whole circle; the second upper handle is rotationally connected with the second lower handle, the second anastomosis semi-ring and the second pressing semi-ring are driven to rotate relatively, the wedge-shaped driving mechanisms in the first anastomosis semi-ring and the second anastomosis semi-ring drive the anastomosis nails to move in the radial direction, and the anastomosis nail bending anastomosis procedure is completed. According to the prepuce anastomat, the clamp type design is adopted, the clamp part is aligned with prepuce tissue needing to be anastomosed, and then anastomosis operation can be completed by gently pressing; the operation steps are greatly simplified, and the operation difficulty of doctors is reduced.

According to the anastomosis nail releasing device and the suturing device, a driving assembly, a needle pushing plate and a containing cavity used for containing anastomosis nails in the anastomosis nail releasing device are sequentially stacked, that is, the needle pushing plate serves as a boundary, so that structures between the driving assembly and the containing cavity do not interfere with each other, on one hand, no other structures exist in the containing cavity, and on the other hand, no other structures exist in the containing cavity; therefore, the containing cavity can contain larger anastomosis nails, the larger anastomosis nails can penetrate through thick human tissue, even if the containing cavity can contain anastomosis nails of various sizes, the application range of the product is widened, and the product can be applied to more operation scenes. On the other hand, no other structure is arranged in the cavity for installing the driving assembly, so that enough space is provided for installing the driving assembly with a complex structure or a large size, the driving assembly has strong driving force, and the anastomosis nail driven by the driving assembly can more effectively penetrate through the human tissue; therefore, effectiveness and reliability of product sewing are guaranteed.

The present invention relates to an end effector and a medical device for firing staples into a formed state. The staple has a staple body and staple legs provided at both ends of the staple body. It is characterized in that it includes a staple cartridge assembly for accommodating the staple and an anvil assembly docked with the staple cartridge assembly. The staple cartridge assembly has a staple cartridge opening oppositely arranged with the anvil assembly, and the anvil assembly is provided with a staple pit docked with the staple cartridge opening. During firing, the staple pit abuts against the staple leg to cause it to deflect and bend relative to the staple body to form a staple. After forming the staple, the projection of the staple leg on the anvil assembly falls into the staple cartridge opening. This end effector and medical device can cause the staple legs of the staple to be misaligned to form a staple, and ensure that the staple legs of each formed staple are fully bent, resulting in more reliable suturing and better anastomosis effect.

The invention relates to the field of preparation of a metal material magnesium alloy, in particular to a preparation method of a low-alloying high-strength medical magnesium alloy wire. The preparation method comprises the following steps: adding not more than 3.6% of zinc, neodymium and zirconium elements into magnesium, optimizing the composition proportion, smelting and extruding to prepare a magnesium alloy bar, preparing the magnesium alloy bar into a wire with the thickness of 0.10-0.30 mm by combining a large cold deformation process with an intermediate annealing process, and performing electric pulse treatment on the wire to finally obtain the finished wire. The strength of the low-alloying magnesium alloy wire can be remarkably improved by combining large-deformation cold deformation with an electric pulse process, good plasticity is kept, and meanwhile, the magnesium alloy wire has good biological safety and degradability, is an ideal implant material and is particularly suitable for being used in the fields of anastomosis nails and the like. In addition, the medical product can be used as line sculptures, suture lines and the like.

The utility model discloses an anastomosis nail releasing device and a suturing device, and the anastomosis nail releasing device comprises a main body, a moving seat, a driving assembly, a needle pushing plate, a driving part and a control part. The mucous membrane tissue is fixed under the action of the extrusion seat and the moving seat, and then the mucous membrane tissue is sutured through the anastomosis nails, so that on one hand, the accuracy and safety of following anastomosis nail puncture can be effectively improved, and effective suturing of the anastomosis nails to the mucous membrane tissue is guaranteed; therefore, safe and effective treatment on mucous membrane tissues is ensured; and on the other hand, simple pushing and pulling actions are needed in the operation, other complicated operation modes are avoided, the operation difficulty of the product is reduced, and therefore the use comfort of the product is effectively improved.

The invention discloses a magnesium alloy anastomosis nail capable of delaying degradation and removing residual stress and a preparation method. The anastomosis nail comprises an anastomosis nail base body and an oxidation film layer. The anastomosis nail base body is made of magnesium alloy, and the magnesium alloy comprises 1.5%-6% of Zn, 0.01%-0.1% of one or more of Si, Mn, Fe, Cu, Ti, Ni, Al and the like and the balance Mg. An oxidation film layer with a multi-layer structure is formed on the surface of the anastomosis nail through micro-plasma oxidation treatment, so that the anastomosis nail has better corrosion resistance, the degradation speed of the anastomosis nail is delayed, and the implantation requirement of the anastomosis nail in a living body is met. Meanwhile, the residual stress of the bent part is removed in a heat treatment mode, the problem of stress concentration of the bent part is solved, and the phenomenon that the bent part is broken in the deformation process of the anastomosis nail is avoided.

An apparatus includes a jaw body, an anvil surface defined by the jaw body, and an elongate slot extending through the anvil surface and along a longitudinal axis of the jaw body. The apparatus further includes a first longitudinal row of staple forming pockets disposed on the anvil surface and configured to form a plurality of first staples such that first legs of each formed first staple are laterally aligned with each other. The apparatus also includes a second longitudinal row of staple forming pockets disposed on the anvil surface laterally outwardly of the first longitudinal row of staple forming pockets relative to the longitudinal axis, and configured to form a plurality of second staples such that second legs of each formed second staple skew laterally away from a second crown of the respective formed second staple.

The utility model discloses an anastomat nail box base, and relates to the field of medical instruments, the anastomat nail box base comprises a base body, the top of the base body is rotatably provided with a nail abutting plate used for clamping tissue of a patient, the bottom of the nail abutting plate is fixedly connected with a cutter, and the middle of the base body is provided with a broken groove used for reducing tissue damage; contact plates are inserted in the positions, on the two sides of the broken groove, of the base body, a plurality of first communicating grooves are formed in the tops of the two contact plates, and second communicating grooves are formed in the positions, located in the first communicating grooves, of the upper end face of the base body; an interaction cavity communicated with the multiple second communicating grooves is formed in the base body, a synchronous plate used for fixing nail bodies is movably arranged in the interaction cavity, a nail box is arranged at the position, located at the bottom of the synchronous plate, in the interaction cavity in an inserted mode, release openings are formed in the positions, located in the multiple second communicating grooves, of the top of the nail box, and multiple pop-up anastomosis nails are arranged in the multiple release openings. The nail box can fix the nail body in multiple directions to prevent looseness, and meanwhile the nail box is easy to install and operate and convenient to replace.

The utility model relates to a device for preventing empty percussion of a surgical instrument, which comprises an anastomat body and a nail abutting seat assembly arranged at a front end opening of the anastomat body, the nail abutting seat assembly comprises an anvil head used for forming anastomosis nails and a connecting shaft sleeve arranged on the rear side of the anvil head, an infrared detection device is arranged in the anastomat body, and the connecting shaft sleeve is arranged on the rear side of the anvil head. The infrared detection device is connected with a control circuit of the anastomat body, an infrared transceiver is arranged on the infrared detection device, and when the infrared transceiver receives reflected infrared rays, the control circuit disconnects the drive motor circuit; and when the infrared transceiver cannot receive the reflected infrared rays, the control circuit closes the driving motor circuit. The electric anastomat has the advantages that the coating capable of absorbing infrared rays is arranged on the outer wall of the connecting shaft sleeve, the light source of the infrared transceiver and the signal receiver are arranged in the anastomat body, whether the anvil block head is installed in place or not can be detected under the condition that the strength and the function of the structure are not affected, and mistaken percussion operation of the electric anastomat is prevented.

The utility model discloses an anastomat anastomosis nail independent gasket which comprises nail foot fixing pieces, foot connecting pieces, a ring piece and a fixing sleeve, a plurality of foot connecting pieces are distributed on the edge of the ring piece, the outer end of each foot connecting piece is integrally connected with the nail foot fixing piece, each nail foot fixing piece is provided with a suturing nail, and the nail foot fixing pieces are fixedly connected with the fixing sleeve. The nail foot fixing pieces are mutually independent, and one side of the ring piece is integrally connected with a fixing sleeve. The nail foot fixing device is reasonable in design, each nail foot fixing piece distributed on the ring piece is a nailing part of a suturing nail, the pain intensity caused by interlocking connection and dragging between the nail foot fixing pieces in the dismounting process is effectively reduced, meanwhile, the width of the foot connecting pieces located between the nail foot fixing pieces and the ring piece is small, and the nail foot fixing pieces are not prone to falling off. And the time required for decomposition and separation is relatively shortened, and the adhesion surface with the skin tissue is reduced.

The invention discloses an anastomosis nail preparation method and an anastomosis nail with an acid-resistant repairable drug-loaded coating, and belongs to the technical field of medical instruments. The preparation method of the anastomosis nail comprises the following steps: S1, preparing a magnesium alloy anastomosis nail matrix from a magnesium alloy wire; s2, a porous oxide layer is prepared on the surface of the magnesium alloy anastomosis nail base body; s3, depositing corrosion inhibition function drug molecules in holes of the porous oxide layer; and S4, the magnesium alloy anastomosis nail base body is placed in a reaction kettle, and a hydrotalcite coating with anti-inflammatory drug molecules is formed on the surface of the magnesium alloy anastomosis nail base body through a hydrothermal method. The degradation rate of the anastomotic nail can be controlled, and anastomotic stoma healing is facilitated.

The utility model relates to the technical field of prepuce anastomats, and discloses an anastomosis nail for a prepuce cutting anastomat, which comprises a nail bin, nail pushing grooves are arranged on the outer side of the top end of the nail bin, bin bodies are arranged on the outer side of the bottom end of the nail bin, stabilizing components are arranged on the inner walls of the inner end and the outer end of the nail bin, nail plates are arranged in bin body cavities, and the nail plates are connected with the nail pushing grooves. And puncture assemblies are arranged on the two sides of the nail plate correspondingly, the stabilizing assemblies comprise fixing blocks located on the inner walls of the inner end and the outer end of the nail bin and connected through springs, stabilizing grooves are formed in the inner side and the outer side of the bottom end of the nail plate correspondingly, and the puncture assemblies comprise nail feet located on the two sides of the nail plate and fixedly connected. The fixing block is driven to move inwards through the elastic force of the spring, the fixing block is matched with the stabilizing groove, the fixing block can prevent the nail plate from falling off due to gravity and collision, the stability of the anastomosis nails in the nail bin is improved, and the situation that the anastomosis nails are prone to falling off, the nail clamping phenomenon occurs, and the operation efficiency is affected is avoided.

The utility model relates to a prepuce cutting stitching instrument, in particular to a prepuce cutting stitching instrument capable of accurately positioning, which comprises a shell, a guide tube, a sliding tube and the like, the top of the shell is connected with the guide tube, the sliding tube is slidably connected in the guide tube and extends into the shell, and the left side and the right side of the guide tube are respectively provided with an opening. And the sliding tube extends out of the guide tube through the opening. According to the prepuce circumcision knife, the prepuce can be subjected to circumcision through the cooperation of the upper annular blade and the lower annular blade, meanwhile, the push block can downwards push the anastomosis nails in the nail grooves, the anastomosis nails can be bent to suture the prepuce under the action of the suture grooves, the prepuce can be accurately positioned through the positioning nails, the overlong prepuce can be effectively cut, and the prepuce can be prevented from being damaged. The frenum is prevented from being too short or misplaced, so that a good cutting effect is achieved, and the cutting position can be accurately positioned by using simple steps through single-person operation.

The utility model relates to a surgical stitching instrument and an end actuator thereof, the end actuator comprises a first clamping component, a second clamping component and a push broach piece, the second clamping component is movably connected with the first clamping component and can be matched with the first clamping component to clamp tissue, the first clamping component is provided with a feed groove extending in the axial direction and a nail bin provided with anastomosis nails, and the second clamping component is provided with a push broach piece. The feed groove divides the opposite surfaces of the first clamping component and the second clamping component into a first part and a second part which are located on the two sides of the feed groove, the width of the first part is larger than that of the second part, and the nail bin is located on the first clamping component where the first part is located. According to the end executor, the nail bin is arranged on the single side of the feeding groove, the function of precisely suturing tissue needing to be reserved is achieved, meanwhile, the tissue to be cut off can be efficiently cut off, and resource waste cannot be caused; by reducing the width of the second part, the end effector is particularly suitable for treating the situation that the excision range of the tissue to be excided is narrow, and the flexibility and adaptability of surgical operation are remarkably improved.

The utility model provides an anastomat which comprises a nailing structure, a plurality of fixing structures and a plurality of fixing structures, the nailing structure comprises a plurality of anastomosis nails, and the anastomosis nails are distributed in the target direction of the nailing structure; the cutting assembly comprises a cutting knife body and a cutting knife head, a blade part is arranged on the cutting knife head, and the cutting knife head is movably connected to the cutting knife body; the driving mechanism is connected with the cutting knife body; during cutting, the driving mechanism drives the cutting assembly to move in the target direction; and meanwhile, the cutting tool bit generates angular displacement in the target direction. The angular displacement of the cutting tool bit improves the cutting effect, the target cutting tissue is prevented from being torn under the pressure of the cutting tool bit, the damage to the blade part in the cutting process is reduced, and the safety in the operation process is improved.

An actuating device for firing staples includes an elastic compression deformation component, a sleeve and an actuating rod, wherein the elastic compression deformation component is configured to be in a compression deformation state when in an unfired state and is released when fired to provide a thrust for the staples; the sleeve has a side wall, a cavity surrounded by the side wall, and a first end and a second end, and a through hole is provided on the side wall of the sleeve, the through hole dividing the cavity into a first space and a second space; the actuating rod is configured to pass through the through hole and is divided into a first part located in the sleeve and a second part outside the sleeve. When in an unfired state, the elastic compression deformation component is accommodated in the sleeve and is blocked by the first part of the actuating rod to maintain the compression deformation state; when fired, the first part of the actuating rod moves away from the blocking position through the through hole to release the elastic compression deformation component, thereby allowing the elastic compression deformation component to at least partially recover from the compression deformation state. A staple assembly and a staple assembly group are also provided.

The utility model relates to the technical field of surgical instruments, in particular to a disposable three-row nail anorectal anastomat which comprises an anastomat body, anastomosis nails and nail anvils, the anastomosis nails are arranged at the end of the anastomat body, and the nail anvils move to be close to or away from the anastomosis nails in the length direction of the anastomat body through a center shaft. A smearing mechanism for storing medical lubricating oil is arranged on the periphery of the anastomat body, the smearing mechanism can slide in the length direction of the anastomat body and smear the lubricating oil on the outer surface of the anastomat body, the smearing mechanism comprises a smearing ring, and the smearing ring is arranged on the periphery of the anastomat body in a sliding mode. An annular discharging groove is further formed in the contact face of the smearing ring and the anastomat body. According to the anorectal anastomat, the smearing ring is arranged on the periphery of the anastomat body, the smearing ring can smear lubricating oil on the outer surface of the anastomat body in the moving process, convenience and rapidness are achieved, and waste is reduced.

This disclosure details a staple cartridge, a staple cartridge assembly, and an anastomosis device, all related to the medical device technology field. A feed groove of the staple cartridge described in this disclosure is designed to extend in the first predetermined direction. Multiple staple slot groups are distributed on both sides of the feed groove along the slot width direction. The number of staple slot groups on each side of the feed groove differs, resulting in different anastomosis stability and widths on both sides of the feed groove along the slot width direction.This can specifically enhance the stability of the anastomosis on the side with a greater number of staple slot groups and can meet the differentiated anastomotic requirements of the tissue-retaining and tissue-discharging ends. Not only does this improve the anastomosis effect on the tissue-retaining end, but it also reduces the amount of bleeding at the tissue-retaining end. Simultaneously, it can also address the issues of anastomosis overuse and the waste of anastomotic staples on the tissue-discharging end. Figure for summary: 1.

The present invention provides a medical stapler, comprising: a stapler body, a stapler magazine assembly, an anvil assembly, and a safety mechanism, wherein the safety mechanism comprises: a safety block, which can move between a first position area of ​​a locking firing mechanism and a second position area of ​​an unlocking firing mechanism; an unlocking member, which is arranged between the anvil assembly and the safety block, and when the anvil assembly moves in a proximal direction along the axial direction of the stapler body, the anvil assembly acts on the unlocking member, so that the unlocking member drives the safety block to move from the first position area to the second position area; an elastic member, which is arranged between a shell and the safety block, and the elastic member provides a biasing force for driving the safety block to move from the second position area to the first position area; the safety mechanism can effectively prevent a doctor from firing the staples and the cutter when the anvil assembly is not fully closed, resulting in poor staple forming and even medical accidents.

An apparatus and a method are provided for a sterile staple implant kit that a surgeon may unpack and utilize during a surgery. The staple implant kit comprises a group of complementary surgery-specific instruments that are packaged in a sterile state. An instrument tray is configured to preserve the instruments in the sterile state until the staple implant kit is opened during the surgery. The instrument tray is configured to provide the surgeon with easy access to the instruments during the surgery. The staple implant kit comprises at least a staple inserter and a surgical staple suitable for being implanted in parallel holes drilled across a bone fusion or fixation site of a patient. The surgical staple preferably is loaded in a relaxed configuration into the staple inserter. A staple retention clip retains the surgical staple in the staple inserter until the staple is distracted during the surgery.

The application belongs to the technical field of medical instrument design and production, and provides a degradable zinc alloy anastomosis nail and a preparation method thereof. The anastomosis nail is formed by adding trace amounts of magnesium, lithium and silver into zinc as a matrix to form an alloy, pouring to obtain an alloy ingot, and then performing hot extrusion and cold drawing on the ingot to obtain zinc alloy wire, and annealing between passes. After the zinc alloy wire is formed, sandpaper roughening, phosphating, mechanical micro-roughening are sequentially performed to build a surface pretreatment layer, a Zn-phytic acid complex anchoring layer, a chitosan ion barrier layer crosslinked by gentian violet and a polylactic acid / magnesium carbonate composite controlled release outer layer are sequentially formed on the pretreated surface, the alloy degradation is synergistically regulated by complex anchoring, ion barrier and outer layer slow release, the metal ion burst release is reduced, the local corrosion product accumulation is inhibited and the acid-base fluctuation is buffered, and the postoperative support and gradual absorption requirements are met.

The invention relates to the technical field of medical equipment, in particular to a surgical incision edge positioning and marking device which comprises a nail bin clamping plate and a nail abutting seat, a nail bin assembly is arranged on the nail bin clamping plate, and a nail pushing unit is arranged on the nail bin assembly. The nail pushing unit comprises a push rod with one end extending into a handle of the anastomat and an I-shaped tool bit which is arranged on the push rod and is used for cutting off mammary tissue and pushing a suture nail; the marking assembly comprises a marking unit and a feeding unit, wherein the marking unit is arranged on the I-shaped tool bit and used for marking and positioning the surgical cutting edge in the process that the I-shaped tool bit pushes the sewing nail, and the feeding unit is arranged on the I-shaped tool bit and used for conveying dye to the marking unit. And a drying assembly. According to the device, in the stitching nail anastomosis process, dye rolling and coating can be synchronously carried out on the preprocessed surface of a stitching nail, multiple colors can be selected, accurate judgment can be carried out in surgical cutting edge marking and positioning, more intuitive visual help is provided, and overall operation is easy and convenient.

A buttress applier cartridge assembly includes a buttress assembly and a buttress applier cartridge. The buttress assembly includes a buttress configured to support a staple formed therein as well an adhesive layer for adhering to an end effector. The buttress applier cartridge includes a housing defining a gap extending in a longitudinal direction as well as a platform. The platform extends longitudinally from a proximal portion to a distal portion and is exposed in a transverse direction adjacent to the gap. The proximal and distal portions respectively have a proximal stiffness and a different, distal stiffness in the transverse direction. Thereby, the proximal and distal portions support the buttress assembly thereon to deform with the proximal and distal stiffnesses and provide reactionary forces of at least the predetermined minimum force while receiving the end effector for accommodating various camber orientations of the end effector.

The utility model provides a percussion piece, a nail bin assembly and a surgical anastomat, the percussion piece comprises at least one wedge-shaped part, each wedge-shaped part comprises a nail pushing part and a nail cutting part, the nail cutting part is located on the near-end side of the nail pushing part and protrudes upwards relative to the nail pushing part, a nail cutting surface is arranged on the side, facing the far-end direction, of the nail cutting part, and the nail cutting surface is located on the near-end side of the nail pushing part and protrudes upwards relative to the nail pushing part. The nail cutting face of at least one nail cutting part is provided with a protruding structure, and the protruding structure comprises at least one protruding part. The protruding structure is arranged on the nail cutting part of the percussion piece, the nail cutting capacity of the percussion piece is improved, the situation that the anastomosis nails cannot be completely disengaged from the nail belt body in the operation process is avoided, and therefore the operation effect is effectively improved.

The application provides a preparation method of a magnesium alloy anastomosis nail and belongs to the technical field of medical materials. The preparation method comprises the following steps: subjecting a magnesium alloy material to melting and casting treatment to form a magnesium alloy ingot; subjecting the magnesium alloy ingot to homogenization heat treatment and extrusion treatment to form a magnesium alloy rod material; subjecting the magnesium alloy rod material to drawing treatment to form a magnesium alloy wire material; subjecting the magnesium alloy wire material to segmented rolling treatment to obtain a magnesium alloy wire material with multiple strengthening regions; and forming the magnesium alloy wire material subjected to the segmented rolling treatment into multiple magnesium alloy anastomosis nails with strengthening parts. The magnesium alloy wire material is subjected to segmented strengthening treatment by using a non-alloying method, the size of the wire material strengthening region can be controlled, the magnesium alloy anastomosis nail suitable for anastomosing tissues with different hardness and different thickness can be customized, the strength and hardness of the anastomosis nail can be improved, the requirement of penetrating part of a relatively thick or hard tissue can be met, and abnormal deformation in different degrees can be avoided.

1. The name of the design product: staple cartridge. 2. The use of the design product: used for installing on surgical instrument, used for containing anastomosis staple. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The present application belongs to the technical field of medical devices, and discloses a blood vessel end-to-end telescopic intraluminal anastomat, which comprises a main handle, a guide rod connected to the front end of the main handle, and an anastomosis head installed at the front end of the guide rod; an anastomosis assembly, which comprises a curved nail forming structure and a plurality of anastomosis nails, the plurality of anastomosis nails are arranged on the anastomosis head in a circumferential direction, the curved nail forming structure is arranged outside the blood vessels to be anastomosed, the anastomosis nails pass through the blood vessel wall from inside to outside of the blood vessels to be anastomosed, and enter the curved nail forming structure to complete bending and fixation; the blood vessels to be anastomosed comprise a first blood vessel and a second blood vessel, the second blood vessel extends into the first blood vessel, the anastomosis nails are arranged across the edge of the broken end of the second blood vessel, so that one side of the nail foot of the anastomosis nail passes through the first blood vessel and the second blood vessel, and the other side of the nail foot passes through the first blood vessel. The present application can realize rapid and uniform circumferential fixation of the broken end of the blood vessel, shorten the anastomosis time, improve the anastomosis quality, and is suitable for the fields of vascular surgery, organ transplantation and microsurgery, and is especially suitable for anastomosis reconstruction of the superior and inferior vena cava of liver transplantation.

The invention discloses a circular cutting anastomat applied to a low rectum, and belongs to the technical field of medical instruments. The circular cutting anastomat applied to the low rectum comprises a nail bin, an anvil block and a percussion handle, and further comprises a driving part, the driving part comprises an elastic assembly and a plurality of driving blocks, each driving block is provided with a plurality of plug pins, each plug pin is inserted into one nail groove and abuts against an anastomosis nail in the nail groove, and the elastic assembly abuts against the driving blocks; the control part comprises a driving shaft, a rotating disc and a plurality of magnets, each magnet corresponds to one driving block, the magnetic poles of every two adjacent driving blocks are opposite, when the elastic assembly is compressed, each magnet is attracted to the corresponding driving block, and when each magnet is separated from the corresponding driving block, the elastic assembly drives the driving blocks to move towards one side of the anvil block. According to the circular cutting anastomat applied to the low rectum, the intestinal tract anastomosis quality can be improved, and anastomotic fistula is prevented from occurring after anastomosis of the intestinal tracts on the two sides.