33results about How to "Small wound" patented technology

The invention relates to a dilator and a vascular sheath, which can solve the pain points such as blood leakage of a puncture point and occurrence of pseudoaneurysm clinically. The dilator comprises a head, a driving mechanism, a suturing mechanism, an electromagnetic mechanism and a sleeve. The driving mechanism comprises an operating part, a connecting rod and an opening-closing assembly, the near end of the connecting rod is connected with the operating part, the far end of the connecting rod is connected with the opening-closing assembly, and when the operating part moves relative to the head, the opening-closing assembly is unfolded or folded; the suturing mechanism is arranged on the opening and closing assembly and comprises a plurality of needle grooves and suturing needles; the sleeve comprises an outer tube and a catheter, the connecting rod is sleeved with the outer tube, the near end of the outer tube is connected with the head, the catheter penetrates through the connecting rod, and the near end of the catheter is connected with the head; the electromagnetic mechanism is arranged on the head part and comprises an electromagnetic control circuit with a control switch and an electromagnetic chuck, and the electromagnetic control circuit is used for enabling the electromagnetic chuck to generate magnetism; when the opening and closing assembly is in an unfolded state, an opening of the needle groove faces the electromagnetic chuck, and the suture needle is located at the position where the suture needle can be attracted by the electromagnetic chuck.

The invention discloses a spine minimally invasive combined type interbody fusion cage and an interbody fixing device.The spine minimally invasive combined type interbody fusion cage comprises an interbody fusion cage body, the interbody fusion cage body is arranged in a fan shape, a distance adjusting supporting structure is arranged on one side of the interbody fusion cage body, and the distance adjusting supporting structure is arranged on the other side of the interbody fusion cage body. The interbody fusion cage body comprises a fusion cage supporting base, a fan-shaped containing plane groove is formed in the upper surface of the fusion cage supporting base, distance adjusting supporting plates consistent in shape and size are placed on the inner side of the containing plane groove, and two symmetrical penetrating jacking grooves are formed in the positions, located at the bottom of the containing plane groove, of the fusion cage supporting base. The interbody fusion cage and the interbody fixing device are combined and fixed, so that after bone paste is injected, the whole interbody fusion cage is fixed to the interbody fixing device, the interbody fusion cage is more stable to use and not prone to deviation, the jacking height of the interbody fusion cage can be accurately adjusted, and adaptability is higher.

The micro cutting ring comprises a ring body, a connecting part and a cutter body, the ring body and the cutter body are arranged at the two ends of the connecting part respectively, the ring body is a closed circular ring, the outer side of the ring body is fixedly connected with the connecting part, and the ring body is used for taking out infected and necrotic tissue of the sebaceous cyst. The annular structure is not prone to causing secondary injury to a patient, clinical safety and convenience are achieved, the cutter body is fixedly connected to the other end of the connecting part, the free end of the cutter body is provided with the cutting edge used for cutting and stripping the cyst, the handheld plate is arranged on the connecting part, and an operator can stably operate and use the micro cutting ring conveniently; the knife and the ring are manufactured into a whole, use is convenient, the knife is a disposable sterile medical instrument product, a doctor can conveniently take and use the knife, cross infection of a patient is prevented, an open surgery for removing sebaceous cyst is changed into a minimally invasive surgery, a wound is easy to heal, the treatment cost of the patient is reduced, and the knife is worthy of clinical application and popularization.

The utility model discloses a surgical puncture guider needle, which comprises a needle part and a threading part, the needle part comprises a needle tip and a transition end extending from the tail part of the needle tip, the threading part is positioned at the tail part of the transition end, and the threading part is provided with a threading hole and a suture accommodating part for accommodating a suture; and the outer diameter of the transition end is greater than that of the threading part. According to the surgical puncture guiding device needle head, the transition section extends out of the tail portion of the needle point, the outer diameter of the threading portion is smaller than that of the transition section, the needle head portion becomes the largest end of the whole puncture needle head, after the puncture needle head penetrates through a sacrospinous ligament, a wound can be as small as possible, and damage to tissue is effectively reduced.

The invention provides an integrated tractor, a traction stitching instrument and a traction puncture outfit. The technical problem that an existing puncture outfit is large in wound is solved. The traction device comprises a traction wire made of elastic metal or memory metal; the traction wire comprises a head traction rope and a tail hanging knot which are sequentially connected and integrally arranged; the tail hanging knot is used for forming a barrier on an acting object to realize traction during use; according to the integrated traction stitching instrument provided by the invention, the stitching instrument penetrates through a pulled target tissue / visceral organ, and the tail part of the traction instrument is hung at the penetration port end of a suture needle to form a barrier, so that traction is realized; a traction device without a suture needle is used, the size of the traction device is small, a wound is small, the pain of a patient is reduced, and clinical application can be achieved by means of a puncture needle with the diameter smaller than 2 mm; the invention further provides a traction stitching instrument and a traction puncture outfit based on the traction device.

The present invention relates to a shoulder dislocation repair system, comprising: a working channel device for delivering a graft bone block from the front side of the shoulder joint, a guiding device for establishing a glenoid bone tunnel from the back to the front, and a fixing device for fixing the graft bone block in front of the glenoid. The shoulder dislocation repair system of the present invention simplifies the number of surgical tools and optimizes the structural design of surgical tools, thereby optimizing the surgical process and improving surgical efficiency; the shoulder dislocation repair system can use a posterior approach to establish the glenoid bone marrow, avoiding the dense areas of the arteries, veins, nervous system, and lymphatic system on the front side of the shoulder joint, so that the wound is small, the damage to the human body is small, the requirements for doctors are low, the surgical risk is small, and it is easy to promote; the use of suture steel plate pressure fixation can avoid the complications related to screw fixation; the bone removal site is changed to the ilium, which does not change the original physiological structure of the human body and will not cause unknown risks.

The invention relates to the technical field of syringes, in particular to a needleless emitter and a using method thereof.The needleless emitter comprises a needleless prefilled medicine core used for conveying liquid medicine and a retaining structure used for limiting the needleless prefilled medicine core; the retaining structure is used for locking and matching the needleless pre-filling and sealing medicine core with the needleless emitter to prevent the needleless pre-filling and sealing medicine core from rotating during disassembly; when the needleless pre-filling and sealing medicine core needs to be removed, the unlocking mechanism on the retaining structure is operated to unlock the needleless pre-filling and sealing medicine core. The prefilled emitter has the beneficial effects that the prefilled emitter can reduce liquid medicine residues to the maximum extent, and the dosage is more accurate; tedious medicine pumping is avoided, and operation is convenient; the advantages of small wound, no pain, high absorption efficiency, avoidance of needle terrorism and the like of needle-free injection can be achieved; various thrust structures improve the stability and operability of needle-free pre-filling and sealing medicine cores of different specifications in the using process.

The invention provides a cultivation management method for reducing the fruit cracking rate of litchis, and belongs to the technical field of agricultural cultivation. According to the litchi cultivation management method provided by the invention, through the measures of pruning, girdling, fertilizer and water management, pest and disease damage management and the like, wounds caused by diseases and pests on fruits are reduced, sudden and violent growth of the fruits is prevented, and the effect of reducing the fruit cracking rate is achieved. By utilizing the method disclosed by the invention, the fruit cracking rate of the glutinous rice cake with the fruit cracking rate up to 20-70% can be reduced to 15-21%.

This invention relates to the field of medical device technology, specifically to a blood collection device for capillary blood, comprising: an upper shell, a microneedle ejection assembly, and a base. The upper shell is fastened to the base, and a folded rubber sleeve is disposed between the upper shell and the base. The microneedle ejection assembly includes a top pusher, a guide shell, and a bottom microneedle disc. A vacuum spring is disposed between the pusher and the base. The pusher is placed inside the folded rubber sleeve and compresses the folded rubber sleeve. An opening for the microneedle disc to enter and exit is provided at the bottom of the base, and a sealing sticker is provided on the base with an opening corresponding to the opening. An air hole is provided on the base, and a one-way valve retainer is disposed at the position of the corresponding air hole. A one-way valve core is embedded in the one-way valve retainer, and a one-way valve spring is disposed between the one-way valve core and the one-way valve retainer. The one-way valve core abuts against the air hole. This invention uses microneedles to pierce the skin epidermis, and by pressing the upper shell, a vacuum is generated within the blood collection device to draw out capillary blood and store it in a test tube.

The present invention provides an adjustable blood vessel fixer, comprising: a binding structure, a fixing structure and a locking structure, wherein the binding structure is a long strip structure; the fixing structure is a square structure, a through hole I is arranged inside the fixing structure, and a through hole II is arranged at the upper wall of the through hole I; the locking structure is a U-shaped sheet structure, and a guide slope is arranged at the front end of the locking structure; the rear end of the binding structure is arranged at the front end of the fixing structure, and the locking structure is arranged in the through hole I. The present invention mainly utilizes the locking structure that can be adjusted to open and close to cooperate with the binding structure, thereby ensuring the locking of the binding while simplifying the volume and operation steps.

The present invention relates to a grafted tree body, and more particularly to a multi-layer grafted tree body and a grafting method for a grafted tree body and a harvested tree body in the next year. At present, walnut grafting is a traditional grafting method, and these grafting methods have a relatively low survival rate, and grafting wounds are difficult to heal, and it is difficult to survive the winter, and economic benefits cannot be generated in time. The present invention includes a rootstock and a multi-layer fringe grafted on the rootstock, wherein the bark is peeled off at each grafting position of the rootstock to form a grafting vertical groove; the lower half of the fringe is cut into a long inclined plane, and the long inclined plane at the lower end of the fringe is behind a short inclined plane, and the old skin is cut from the upper end of the short inclined plane and the back of the long inclined plane to form a vertical plane; the long inclined plane, short inclined plane and vertical plane of the fringe are inserted into the grafting vertical groove of the rootstock. The present invention provides a grafting operation that is simple and convenient, the rootstock is lightly injured, and multi-layer grafting is performed to increase the fruiting part. Healing is easy, the survival rate is high, and it is more than 90%, it is not easy to be blown down by wind and sand, 100% can safely survive the winter, and the grafting results early and the yield is high.

The invention relates to an automatic width adjusting device, method and system for a skin taking machine, and relates to the technical field of medical instruments.The automatic width adjusting device comprises a skin taking knife body, a blade is installed on the skin taking knife body, a skin taking part is formed on one side of the blade, and a bottom plate is arranged on the skin taking knife body; the two bottom plates are oppositely arranged on the side, close to the skin taking part, of the blade. A driving assembly is arranged on the dermatome body and drives the two bottom plates to slide towards the sides close to each other or away from each other. An adjusting rod is rotationally installed on the side, close to the skin taking part, of the skin taking knife body, a rolling wheel is rotationally installed at one end of the adjusting rod, and an encoder is installed in the rolling wheel and used for measuring the angular displacement of the rolling wheel. The cut healthy skin can be better attached to the burn wound skin defect position, waste of the healthy skin in the skin grafting repair operation is reduced, and meanwhile damage to the healthy skin taking position is reduced.

The utility model discloses an osteomyelitis minimally invasive medullary cavity focus cleaner which comprises a group of screws which are symmetrically arranged, a channel is arranged in the screws in a penetrating mode, a penetrating-in hole and a penetrating-out hole are formed in the two ends of the channel respectively, the penetrating-in hole is formed in the ends, away from the pointed ends, of the screws, the penetrating-out hole is formed in the side walls of the screws, a guide pipe is arranged in the channel in a penetrating mode, and an inner guide pipe is arranged in the guide pipe in a penetrating mode. The channels communicated with the medullary cavity are arranged on the bones on the two sides of the focus respectively, flushing fluid is flushed into one side of the focus along the channels to flush and dilute diseased tissue, and the diseased tissue which falls off due to flushing or is improved in liquidity due to dilution is extracted from the other side of the focus along the channels. Therefore, the aim of cleaning the focus in the medullary cavity is fulfilled. The screw is used for perforating a bone with a medullary cavity focus needing to be removed, the hollow hose type catheter penetrates into the medullary cavity along a channel, the inner catheter made of the flexible material penetrates into the catheter, direct contact and friction between the catheter and medullary are reduced, and reverse transfer and infection expansion of the osteomyelitis focus are avoided.

The utility model belongs to drainage tube technical field, specifically chest cavity multi -position drainage tube, including hose one, the inside lower surface left and right sides of hose one are all set up and have the through -going hole of through -going type, two the through -going hole between penetration has hose two, the right end of hose two penetrates hose one, the left end of hose two is set up as the connecting end, the right end of hose two curved end sets into the insertion end, the right end of hose two curved place sets up and has a plurality of through -going type through -hole, the utility model discloses buffer assembly can when hose one and hose two are subjected to the drawing to buffer, and when hose one and hose two are subjected to the drawing to drive the sliding of buffer block in the inner groove, and when the sliding of buffer block is guided through the sliding connection of guide rod and guide groove, then buffer block is extruded and is triggered to buffer the extrusion received, and make hose one and hose two are subjected to the drawing to get the buffer, and avoid the injury of patient after the drawing of hose one hose two.

This invention relates to the field of medical device technology, specifically disclosing a tumor resection device, including a resection mechanism, a body, a handle, a drive mechanism, a transmission mechanism, and an adsorption mechanism. The handle, body, and resection mechanism are sequentially connected. The drive mechanism is installed inside the handle, and the transmission mechanism is installed inside the body and connected to the drive mechanism and the resection mechanism. The drive mechanism drives the resection mechanism to perform tumor resection via the transmission mechanism. The adsorption mechanism is installed inside the handle and body, and when the resection mechanism removes the tumor, the adsorption mechanism removes the removed tumor. The tumor resection device has an elongated structure, and the maximum outer diameter of the cross-section of the tumor resection device is less than or equal to 10 mm. This invention's resection mechanism removes the tumor through the adsorption mechanism, effectively reducing the wound, alleviating patient pain, and lowering surgical risks.

The utility model relates to a positioning guider for acromioclavicular dislocation implantation surgery, which comprises a connecting part, positioning parts respectively arranged at two ends of the connecting part and a drill bit guide cylinder, a rotary sleeve in threaded fit is arranged on the outer surface, close to the bottom, of the drill bit guide cylinder, and a fixed shaft axially parallel to the rotary sleeve is arranged outside the rotary sleeve. An arc-shaped sleeve is rotationally arranged on the fixing shaft, a clamping part is arranged at the non-hinged end of the arc-shaped sleeve, and a limiting protrusion used for limiting the rotating stroke of the arc-shaped sleeve is arranged at the position, matched with the fixing shaft, of the arc-shaped sleeve. The clamping part is arranged outside the drill bit guide cylinder in a folded mode through the arc-shaped sleeve, when the drill bit is used, the unfolded clamping part can clamp an upper skeleton through relative rotation between the fixing shaft and the arc-shaped sleeve, the overall sectional area is small after the drill bit is folded, and the drill bit is convenient to use. And a wound caused in the process of placing the drill bit guide cylinder is smaller.

The invention discloses a threading and fixing device for preventing tongue from falling back in the field of medical technology. The device comprises a threading rod, which is a curved rod, one end of which is provided with a rotating shaft, and the other end of which is fixedly provided with a pricking needle, wherein a threading hole is provided at the tip of the pricking needle; a docking sleeve rod, which is a curved hook-shaped structure, one end of which is rotatably connected to the threading rod through the rotating shaft; and a thread clamping tube, which is a hollow tubular structure, fixedly provided and connected to the other end of the docking sleeve rod, and wherein a spring clip is provided inside the thread clamping tube. The device simply sews lips and a tongue body together quickly, and only needs to pierce the tongue body and lips once with a needle, and the thread head on the needle head also follows the needle head to pierce the tongue body and lips. The threading is fast, and the threading process is stable, and there is no need to sew with a handheld needle and thread, and the whole needle does not completely pierce the tongue body and lips from beginning to end, but only the needle tip is pierced once and then can be withdrawn, so the wound is small and there is no need to clamp the needle all the time.

The utility model relates to the technical field of medical apparatus and instruments, and discloses a minimally invasive scalpel for carpal canal surgery, which comprises a scalpel handle, a scalpel head and a handle, the pushing and scratching mechanism is arranged at the top end of the surgical knife handle; and the positioning mechanism is arranged above the surgical knife handle. Through the arrangement of the extension rod, the push block, the rotating rod, the first spring and the tooth plate, when the push block is pushed, the push block drives the extension rod to move leftwards through the sliding block, and due to the fact that the rotating rod is movably connected with the tooth plate, the rotating rod rotates with the fixed rod as the axis and compresses the first spring along with the movement of the push block; and when the push block stops moving, the rotating rod is reset under the recovery action of the first spring, so that the push block is prevented from moving back, pushing and ripping of the carpal canal can be achieved, the wound surface is reduced, and the operation effect is improved.

The present application provides a registration method and device for X-ray images, including: acquiring an X-ray image, the X-ray image being obtained by an image acquisition device photographing a lesion; using the X-ray image to obtain a first positional relationship, the first positional relationship being the positional relationship between the image acquisition device and a locator, the locator being fixed around the lesion; fitting the X-ray image with a plurality of pre-generated digitally reconstructed radiographic images; using the first positional relationship to obtain a second positional relationship, the second positional relationship being the positional relationship between the image acquisition device and the lesion in the fitted digitally reconstructed radiographic image. By fitting the positional relationship between the lesion and the image acquisition device reflected in the X-ray image to the digitally reconstructed radiographic image, it is no longer necessary to manually pair the points on the wound surface and the digitally reconstructed radiographic image one by one to establish a positional relationship, thereby achieving the effect of reducing the duration of the operation and the size of the wound surface.

The utility model discloses a whole body usable closing release device, which comprises a sleeve, a hollow pipe and a cutting knife, the side wall of the sleeve is provided with a guide groove, the hollow pipe moves along the guide groove, the side wall of the hollow pipe is provided with a knife outlet, one end of the hollow pipe far away from the knife outlet is provided with a holding part, and the cutting knife is arranged in the holding part. A through hole is formed in the side wall of the holding part, a groove is formed in the side wall of the holding part, a supporting seat is arranged at the bottom of the cutting knife, a transmission rod is movably matched with the side wall of the supporting seat through a rotating shaft, a rotating shaft block is movably matched with the other end of the transmission rod, and a threaded rod is arranged on the side wall of the rotating shaft block. According to the novel surgical knife, the cutting knife can be contained in the hollow pipe, the cutting knife is prevented from cutting other body tissues in the process that the cutting knife stretches into the hollow pipe along the sleeve, and the number of wounds is reduced to a great extent.

An intraocular lens capsule bag comprises: a capsule bag body, which is a flexible and foldable bag body with a capsule bag opening; a capsule bag support and fixing structure, which comprises a first memory alloy body and a second memory alloy body; the first memory alloy body and the second memory alloy body penetrate the capsule bag body; when the intraocular lens capsule bag is implanted, the first memory alloy body and the second memory alloy body surround an annular structure, and the annular structure is located in the capsule bag body to expand the capsule bag body, so that the capsule bag body can load an intraocular lens; when the intraocular lens capsule bag is in a push injection state, the first memory alloy body and the second memory alloy body are straightened into a linear structure, and the capsule bag body is wound on the linear structure. The intraocular lens capsule bag is used for implanting intraocular lenses.

The invention relates to a CNTs modified anti-sticking silver-nickel alloy, which comprises the following components in percentage by mass: 4.0-5.5% of Ni; 0.03-0.2 part of a rare earth element and an oxide thereof; 0.1 to 0.5 part of CNTs (carbon nanotubes); and the balance being Ag. Compared with a common silver-nickel alloy, the alloy disclosed by the invention is added with the CNTs, the rare earth elements and the oxides of the rare earth elements with specific contents, so that on one hand, the alloy has high mechanical property and the service life is prolonged, and on the other hand, the anti-arc characteristic of the CNTs and a structure different from carbon deposition are utilized; and therefore, tissue adhesion, carbon deposition and the like in contact with the alloy are reduced. Besides, due to the existence of the rare earth and the CNTs, the interface of the silver-nickel alloy is not coherent, and tissue adhesion and carbon deposition are also not coherent, so that the alloy is easier to wipe and clean while the tissue adhesion and the carbon deposition are reduced.

The invention provides an intramedullary nail which comprises a sleeve, a driving assembly, a transmission assembly and a supporting nail, the driving assembly and the transmission assembly are arranged on the upper portion of the sleeve, the supporting nail is arranged on the lower portion of the sleeve, the transmission assembly comprises a rotating rod and a rotating ring, and a limiting groove is formed in the sleeve. The limiting groove is used for limiting the axial position of the rotating rod in the sleeve, external threads are arranged on the outer circle wall of the rotating rod, internal threads matched with the external threads are arranged on the inner circle wall of the rotating ring, and the rotating ring is arranged above the supporting nail. The driving assembly can drive the rotating rod to rotate around the axis of the rotating rod from the side face or the top, and the rotating ring can drive the supporting nails to do axial movement synchronously. By means of the structure, the intramedullary nail can flexibly adjust the lengthening speed and strength according to the condition of a patient, the lengthening process is stable, the lengthening result is accurate, operation is convenient and fast, a wound is small, and the machining method is low in cost and high in efficiency.

This invention discloses an adjustable suture looper and a vascular closure device. The adjustable suture looper includes a control handle, an adjustable bend tube, a separation mechanism, and a suture retrieval mechanism. The adjustable bend tube extends from the front end of the control handle. The separation mechanism is located at the front of the adjustable bend tube and includes a pair of openable and closable separation heads with through holes for threading surgical sutures. The suture retrieval mechanism is axially positioned on the outer layer of the adjustable bend tube. The control handle controls the bending of the adjustable bend tube and the opening, closing, and forward / backward movement of the pair of separation heads. The suture retrieval mechanism retrieves the surgical suture from the separation heads. The vascular closure device includes an adjustable suture looper and a knot pusher. The knot pusher pushes the knot on the surgical suture to the blood vessel and cuts the suture. This invention features minimal invasiveness and damage, reduces the risk of complications such as vasculitis, allergies, and thrombus dislodgement, and provides a long-lasting vascular closure effect.

The present invention relates to the field of medical device technology, and in particular to a transumbilical costal cartilage high-power scissors, comprising: a shearing assembly, including a scissor blade group and a limit seat, one end of the scissor blade group is a control end, the control end is arranged in the inner cavity of the limit seat and can make reciprocating motion along the axis of the limit seat; a transmission assembly, including a protective member connected to the limit seat and a transmission member arranged in the inner cavity of the protective member, the transmission member includes a traction end and a transmission end, and the transmission end is connected to the control end; a driving assembly, including a driving member shell connected to the protective member and a force-applying member rotatably connected to the driving member shell, one end of the force-applying member is the force-applying end, the force-applying end is arranged at the fingertips and can make a fan-shaped swing with the driving end as the center of the circle; the other end of the force-applying member is the driving end, the driving end is arranged in the inner cavity of the driving member shell and connected to the traction end, and can drive the traction end to drive the transmission member to make reciprocating motion along the axis of the limit seat.

The utility model discloses a vomica flushing tube convenient to place, which comprises a supporting tube, a flushing tube is fixedly mounted at the top of the supporting tube, one side of the supporting tube is connected with a communication component, a plurality of flushing holes are formed in the outer side of the top of the flushing tube, an isolation plug is mounted in an inner cavity of the supporting tube, a steel needle is inserted in the isolation plug, and a needle is inserted in the steel needle. The steel needles are made of stainless steel materials. The top end of the flushing pipe and the steel needle are punctured into oral cavity gap abscess together, drainage and flushing work can be conveniently conducted through the communicating assembly after the steel needle is pulled out, operation is easy, trauma is small, and recovery is easy.

The screw taking-out device of the bone fracture plate for the orthopedics department comprises a positioning rod, a human body soft tissue spreader, a positioning cylinder and a screwdriver, when a screw of the bone fracture plate for the orthopedics department is taken out, the positioning rod is firstly inserted into the head of the screw of a single-hole bone fracture plate, or the positioning rod is inserted into the head of the screw of a two-hole locking bone fracture plate, and then the screw of the bone fracture plate for the orthopedics department is taken out. Or the positioning rod is inserted into the screw hole, without the screw, of the two-hole locking bone fracture plate, then the human body soft tissue spreader is nested on the positioning rod and spreads the human body soft tissue around the positioning rod to expose the screw, and then the positioning cylinder is nested on the soft human body tissue spreader, so that the screw is right opposite to the positioning cylinder; then the positioning rod and the human tissue spreader are taken out of the sleeve, and finally a screwdriver is inserted into the positioning cylinder to detach the screw, so that the problem that the screw is difficult to position and take out quickly in an orthopedic operation can be solved, the wound of a patient can be reduced, the operation time can be shortened, and the pain of the patient can be reduced.

The invention belongs to the field of medical catheter instruments, and particularly relates to a dialysis catheter. Comprising a catheter extending in the longitudinal direction, the catheter comprises a catheter body at the far end and at least two auxiliary catheters communicated with the near end of the catheter body, inner cavities correspondingly communicated with the auxiliary catheters are formed in the catheter body, and side holes corresponding to the far ends of the inner cavities are formed in the catheter body; the base is connected to the near end of the auxiliary catheter and is communicated with the connected auxiliary catheter. The whole dialysis catheter is buried subcutaneously, the wound of the puncture medical instrument to the skin is small and easy to recover, the infection risk is greatly reduced, the base is not exposed out of the body and is relatively stably connected with the skin, the risk that the base is accidentally dragged out does not exist, and the influence on the life of a patient is also remarkably reduced. In addition, sterile liquid can be injected into the dialysis catheter through the side hole, so that the catheter cannot be tightly attached to the superior vena cava, the probability of thrombus formation is reduced, and the dialysis catheter has the advantages of being not prone to infection, small in influence on life and friendly to patients.

The invention discloses a spine anterior structural bone grafting internal fixing device which comprises a fixing sheath and a steel nail set, the steel nail set is arranged in the fixing sheath and comprises a first fixing nail, a second fixing nail and a third fixing nail, the top of the first fixing nail is connected with a bent first connecting arm, and the top of the second fixing nail is connected with a bent second connecting arm. The top of the second fixing nail is connected with a bent second connecting arm; a convex ring on the inner wall of the fixing sheath is sleeved with an adjusting piece for adjusting the telescopic length of the first connecting arm and the second connecting arm in a clearance fit mode, and a locking piece is arranged above the convex ring; the third fixing nail is arranged in the through hole of the fixing sheath, a pressing block is arranged on the top face of the third fixing nail, and the locking piece is pressed between the protruding ring and the adjusting piece through the pressing block. After the whole structure of the device is combined, the stability is good, and a bone grafting block is firmly fixed; and secondly, the device is light and thin in structure and small in volume, so that a wound needing to be formed is small, bleeding is little, damage to bones is small, and trauma in an operation or after the operation is reduced.

The present invention discloses a stapler and its slitting assembly and fixing assembly, including an upper mating piece, which is divided into an upper mating surface and a top surface, and the upper mating surface is recessed toward the top surface to form a nail anvil, and the nail anvil is arranged in 4 rows; a lower mating piece, one end of which is hinged to one end of the upper mating piece, and includes a lower mating surface and a bottom surface, and the lower mating surface is recessed toward the bottom surface to form a nail magazine, and the nail magazine is arranged in 4 rows; wherein the upper mating piece and the lower mating piece are both made of metal; wherein the diameter of the slitting assembly is 10 mm. The all-metal nail forming system, the parts are produced by metal powder injection molding technology, and the nail forming effect is better; the cutting and anastomosis resistance and the tension of the cutting knife are reduced by structural optimization; the nail anvil and the nail anvil cover are designed as one piece and produced by metal powder injection molding technology; the separate riveted pin structure is optimized to an integrated riveted column structure.