72results about How to "Avoid surgical risks" patented technology

The invention belongs to the technical field of medical instruments and particularly relates to a dilatation device for a cardiology surgery. The dilatation device comprises a rectangular support frame and four slide bars, wherein support legs are arranged at four corners of the rectangular support frame; the rectangular support frame comprises a first support plate, a second support plate, a third support plate and a fourth support plate which are connected end to end; first strip through holes are formed in the first support plate and the third support plate; second strip through holes are formed in the second support plate and the fourth support plate; the four slide bars include a first slide bar, a second slide bar, a third slide bar and a fourth slide bar; the first slide bar and the second slide bar are connected with the inside of the first strip through holes in a sliding manner and are fixed through first limiting nuts; the third slide bar and the fourth slide bar are connected with the second strip through holes in a sliding manner and are fixed through second limiting nuts. The surgery retraction is quickly achieved through arranging the four slide bars in sliding connection, and support is carried out through the support legs, so that the stability in the using process is improved.

The invention discloses an automatic identification system for a surgical cutter, which comprises an external cutter and a controller. The external cutter is provided with a plug; and the controller is provided with a socket and a processing circuit. The system is characterized in that: the plug is provided with an electronic tag; the socket is provided with an identification coil; the identification coil is connected with the processing circuit; the identification coil acquires electromagnetic information of the electronic tag, and then sends a signal to the processing circuit; and the output end of the processing circuit is connected with the input end of a control motor. The system has the advantages that: the system can automatically identify the type of the cutter currently connected with the controller, and can automatically replace drivers of the corresponding cutters according to the type of the cutter; a doctor can set working parameters before a surgery, and directly assembles the cutter during the surgery to directly perform the surgery so as to shorten surgical time and avoid surgical risk caused by parameter setting errors.

The invention discloses a wound-free adjusting type splint holder support used for fracture of distal radius. The wound-free adjusting type splint holder support used for fracture of distal radius comprises a hand portion splint holder, a forearm splint holder, traction universal adjusting rods and a connector. The two traction universal adjusting rods are fixedly connected with the hand portion splint holder and the forearm splint holder respectively, the two ends of the connector are movably connected to the traction universal adjusting rods respectively, a first connecting device is arranged on the hand portion splint holder, and a second connecting device is arranged on the forearm splint holder. The wound-free adjusting type splint holder support used for fracture of distal radius combines the advantages of operation treatment by splint fixation and an external fixation support, is superior to other treatment methods in aspects of maintaining fracture alignment and avoiding surgical risks and complications, and has advantages in aspects of a distal radius anatomy structure and wrist joint function recovery.

The invention discloses a method and a device for measuring fractional flow reserve. The method comprises: obtaining a blood vessel characteristic parameter of a target patient's coronary artery, wherein the blood vessel characteristic parameter includes a blood vessel cross section radius of a set position and a stenotic characteristic parameter of a stenotic area of the coronary artery; inputting the blood vessel characteristic parameter into a pre-established fractional flow reserve measurement model, to obtain the fractional flow reserve of a target patient. The method and the device solveproblems that time consumption for measuring the fractional flow reserve and requirement for equipment calculation are high, and the method and the device can measure the fractional flow reserve efficiently and accurately in real time.

The invention discloses a pulmonary artery valve replacement device and a support thereof. The support comprises a valve fixing part, the top edge of the valve fixing part and a support part used for supporting a left pulmonary artery or / and right pulmonary artery are connected through a transitional section, and both the valve fixing part and the support part are of cylindrical structures. The transitional section is provided with a transitional arc surface fittingly contacting with the inner wall of blood vessels. The pulmonary artery valve replacement device comprises a pulmonary artery valve support, an artificial valve is arranged in the valve fixing part, and the valve fixing part is provided with a tectorial membrane below the artificial valve. The pulmonary artery valve support and the pulmonary artery valve replacement device can solve two problems that backflow of pulmonary artery valve and restenosis of pulmonary artery after pulmonary artery valve operation at the same time and are high in stability, operation risk of support displacement is avoided, damage of blood vessels are less prone to causing, stenosis of pulmonary artery branches is solved and repeated implanting of multiple supports is not needed.

The invention is a method for brain glioma computer aided diagnosing system based on data excavating. The invention carries on attributes digitized process to data in the case bank at first by using the information in the case bank of the alioma sufferer, and creates the fuzzy membership relation to the digitized relation. Then the invention uses the fuzzy principle extraction method of the fuzzy maximal and minimal nerve network. The principle of diagnosis for excavating and discovering the alioma malignancy degree, the system is created according to the principle. The system can acquire the malignancy degree of any new case, acquires a high accuracy.

The invention is applicable to the technical field of operation assisting control, and provides a medical instrument control method and system for assisting in an operation. The method comprises the steps of acquiring attitude information of a first motion catcher and / or a second motion catcher in real time; based on current attitude information and original attitude information of the first motion catcher, obtaining the first attitude change amount; and / or, based on current attitude information and original attitude information of the second motion catcher, obtaining the second attitude change amount; based on the first attitude change amount and / or the second attitude change amount, determining the position offset and / or the attitude offset; according to the position offset and / or the attitude offset, adjusting the displacement and / or the attitude of a medical instrument. By means of the method or system, the operation can be accurately reflected in real time, according to the willing of a doctor, the system is closely cooperated with the operation progress to meet requirements of the operation, and the operation risk caused when an assistant or a nurse controls and adjusts the displacement and / or the attitude of the medical instrument can be avoided to a certain extent.

The present application relates to a transcatheter valve replacement system. The system includes a valve replacement prosthesis, a delivery catheter, a control handle and an anchoring device; the valve replacement prosthesis includes a valve stent, an artificial valve leaflet and an adaptive covered stent, the artificial valve leaflet is arranged in the valve stent, the adaptive covered stent is connected to the outer periphery of the valve stent, the valve replacement prosthesis is provided with an anchored unit, and the anchored unit is fixed to heart tissue by the anchoring device; and theanchoring device is arranged in the delivery catheter, the anchoring device includes an anchoring needle, an anchoring needle catheter, an anchoring needle push rod, and a controllable guiding device,the anchoring needle is pre-installed in the distal end of the anchoring needle catheter, the distal end part of the anchoring needle catheter has a flexible structure, one end of the controllable guiding device is detachably connected to the anchored unit, and the controllable guiding device can control the distal end part of the anchoring needle catheter to form a fixed bend angle in the radialdirection and make the distal end of the anchoring needle catheter adhered to the anchored unit.

The invention provides a difference-frequency electric stimulation device, system and method. The device comprises an input module, a central processor, a signal generation module and a signal outputmodule connected sequentially; the signal output module comprises multiple output interfaces, and each output interface is connected with one pair of electrodes; and at least two pairs of electrodes are arranged in a stimulated position of a stimulated object. Via the two or more pairs of electrodes, the electric stimulation device transmits two or more currents of different frequencies to the stimulated object, a low-frequency modulated pulse current (namely a difference frequency signal) is generated in a crossed area of the currents, and the low-frequency modulated current has an adjustmenteffect for brain cells. The low-frequency modulated current can stimulate the deep of the brain without influence on superficial neuron cells, and thus, the defect that the low-frequency current cannot reach deep in the brain is overcome, the risk of operation is reduced via an non-intrusion feature, the safety is high, a user is more willing to accept the device, and the applicability is high.

The invention discloses an ultrasonic-assisted preparation of porous bone cement scaffold and a preparation method thereof. The preparation method comprises the following steps of under a low-temperature environment, adding a hectorite solution and a polymer curing solution into calcium phosphate powder in sequence, and uniformly mixing, so as to obtain slurry; extruding the slurry according to apreset shape by an extrusion type 3D (three-dimensional) printer and a coaxial printer head; then, transferring into a constant-temperature and constant-humidity box, and hatching for a period of time, so as to obtain a bone cement three-dimensional scaffold; finally, placing the bone cement three-dimensional scaffold into an acetate solution, and treating by ultrasonic waves for a period of time,so as to obtain the porous bone cement scaffold. The porous bone cement scaffold has the advantages that the shape can be designed so as to meet the requirement of accelerating cell growth; the mechanical property and biology property are good; compared with the prior art, an ultrasonic-assisted perforating method is suitable for the bone cement scaffold which is prepared by 3D printing, the method is simple, the implementation is easy, and the method is suitable for being popularized and applied.

A medical multifunctional dredging needle comprises a core needle and a tubular needle. The core needle is sleeved with a tube hole of the tubular needle, and the core needle is in clearance fit withthe tubular needle. The core needle comprises a needle head, a needle body and a needle handle, wherein the needle head, the needle body and the needle handle are sequentially connected into one body,the needle head is in smooth connection with the needle body, the needle head of the core needle stretches out of the head end of a needle body of the tubular needle, and the needle handle of the core needle stretches out of the tail end of a needle base of the tubular needle; the needle body of the core needle is a cylinder or a long cone, the needle body is solid or hollow and tubular, and thehollow tube is directly connected with the most front end of the needle head of the core needle; a temperature-control electric-heating treatment material, a temperature-control fluid treatment material, a laser treatment material, a radio-frequency temperature-control treatment material and other treatment materials can be added into the core needle, so that various medical multifunctional dredging needles are formed correspondingly. The tubular needle of a hollow and tubular structure comprises the needle body and the needle base which are sequentially connected into one body, the needle body of the tubular needle is cylindrical or in a long cone shape; the needle handle of the core needle can be locked the needle base of the tubular needle up. Due to the innovation of the core needle and the tubular needle, the needle treatment safety and scientificity are improved fundamentally, and pathological factors caused by soft tissue injury are removed.

The invention discloses a drift tube straightener for a peritoneal dialysis tube. The drift tube straightener is characterized by comprising an adjusting elbow made of soft silica gel and arranged tobe of a hollow structure, notches are formed on the outer side wall of each of two opposite sides of the adjusting elbow, penetrating holes are formed in the middle of the direction of wall thicknessof the adjusting elbow, and adjusting and controlling ropes for containing and releasing the notches are penetratingly arranged in the penetrating holes; the adjusting elbow is provided with a rotating member for operating the adjusting and controlling ropes in a manner of being away from one end inserted into the peritoneal dialysis tube, and one ends of the adjusting and controlling ropes are fixedly connected with one end, inserted into the peritoneal dialysis tube, of the adjusting elbow while the other ends of the same penetrate the penetrating holes and then are in winding connection with the rotating member; a magnetism member is arranged at the end, used for being inserted into the peritoneal dialysis tube, of the adjusting elbow and can be in magnetic attraction with the magneticmember. The drift tube straightener can achieve the objectives of enabling the drifting peritoneal dialysis tube to return to a normal position in the abdominal cavity, avoiding surgical risk, relieving patient suffering and lowering medical cost.

The invention provides an application method of a composite columnar balloon prostatic splitting catheter with an anteceding inner balloon. By employing double positioning, to be specific, first positioning of a positioning protrusion and second positioning of the inner balloon, it is possible to more precisely insert the prostatic splitting catheter in position, and surgical risk due to insertion positional deviation of the prostatic splitting catheter is avoided; by using the prostatic splitting catheter with the anteceding inner balloon, operation difficulty is reduced, and positioning accuracy is improved; by employing gradient pressurizing of the inner balloon and an outer balloon, it is possible to effectively relieve the pain in a patient and significantly enhance splitting effect.

The invention discloses a cruising locator for pulmonary minimal focuses under a thoracoscope. A navigation probe is arranged at the tip of a pair of lung grasping forceps, and a micro-electromagnetic sensor is arranged inside the navigation probe. The cruising locator is matched with an in-vitro electromagnetic locating panel, an electromagnetic patch and an electromagnetic navigation host, and is used for performing chest CT scanning and three-dimensional reconstruction on the scanned image to obtain a chest three-dimensional analog image, a doctor marks location and size of a doubtable focus position in the analog image and inputs the marked image to the electromagnetic navigation host, and the system is used for automatically simulating an optimized location navigation path, so that a pulmonary minimal focus can be easily located by utilizing the navigation probe under guidance of a real-time navigation system in the thoracoscopy. The cruising locator is simple in structure, can be used for accurately and quickly reaching a target focus and avoiding the operation risk generated when location is carried out in other operations, has relatively low requirement for doctors and patients, is safe and reliable to operate, and has a good practical value.

The invention relates to the technical field of medical instruments, and discloses a press-holding system and a press-holding method. The press-holding system comprises a valve press-holding machine,a handheld press-holding device, a conveyor, press-holding sponge and a press-holding film, wherein the valve press-holding machine is used for performing first-stage press-holding on a valve, and thehandheld press-holding device is used for performing second-stage press-holding on the valve; the press-holding sponge is used during first-stage press-holding, and adopts a cylindrical structure, and the valve is arranged in the press-holding sponge in a penetrating manner; and the press-holding film is used during second-stage press-holding, and adopts a cylindrical structure, the valve is arranged in the press-holding film in a penetrating manner after the first-stage press-holding is finished, and the handheld press-holding device is provided with a self-locking structure. According to the press-holding method, the valve press-holding machine is used for performing first-stage press-holding on the valve, and the handheld press-holding device is used for performing second-stage press-holding on the valve. The valve can be effectively prevented from being broken in the press-holding process, and the valve is prevented from rebounding after being pressed and held.

The invention discloses a pair of multifunctional surgical lock catch pliers. The pliers comprise a long tube, a clamping device is arranged at one end in the length direction of the long tube, and acontrol device is arranged at the other end; the clamping device comprises a sleeve and two symmetrically arranged calipers, the sleeve is composed of two sections, a section is a cylindrical connecting section, the other section is an elliptical mounting section, the connecting section and the long tube are connected by a rotating device, the rotating device comprises mounting brackets in threaded connection with one end of the connecting section and one end of the long tube respectively, and a connecting piece is arranged between the two mounting brackets, wherein the two ends of the connecting piece are respectively rotatably connected with the mounting brackets; the pliers have the advantages of simple structure, low processing cost, convenient use, stable operation, safety and reliability and complete functions, solve the problem in the prior art that the angle of the clamping end of a pair of lock catch pliers cannot be adjusted, improves the efficiency of the operation, saves time, and reduces the risk of surgery.

The invention discloses a wound-free adjusting type splint holder support used for fracture of distal radius. The wound-free adjusting type splint holder support used for fracture of distal radius comprises a hand portion splint holder, a forearm splint holder, traction universal adjusting rods and a connector. The two traction universal adjusting rods are fixedly connected with the hand portion splint holder and the forearm splint holder respectively, the two ends of the connector are movably connected to the traction universal adjusting rods respectively, a first connecting device is arranged on the hand portion splint holder, and a second connecting device is arranged on the forearm splint holder. The wound-free adjusting type splint holder support used for fracture of distal radius combines the advantages of operation treatment by splint fixation and an external fixation support, is superior to other treatment methods in aspects of maintaining fracture alignment and avoiding surgical risks and complications, and has advantages in aspects of a distal radius anatomy structure and wrist joint function recovery.

The invention is applicable to the field of medical health care, and provides a vision correction assisting method and system. The method comprises the steps that initial vision data of a user is detected through an optometry device; training data corresponding to the initial vision data of the user is generated, wherein the training data comprises the type of a training lens; the degree of the training lens is obtained according to the initial vision data of the user and the type of the training lens; the degree of the training lens is adjusted, and the initial vision data of the user is adjusted to a preset vision range; the degree of the adjusted training lens and the training lens corresponding to the training data are selected, and the training lens is utilized for conducting corresponding training operation on the user. According to the embodiment, the vision is improved without operations, and the risks of the operations and the occurrence of sequelae can be effectively avoided;meanwhile, training is conducted according to scientific training data, reoccurrence of the shortsightedness is unlikely to occur, the diopter can be lowered, and the axis oculi is shortened.

The invention relates to the technical field of medical instruments, in particular to a posterior cervical plate, which comprises a first cervical plate, a second cervical plate and a U-shaped connecting body with an opening the size of which is adjustable, wherein the first cervical plate and the second cervical plate are connected through the U-shaped connecting body; the first cervical plate and the second cervical plate are all arranged as a bent cervical plate. According to the invention, the treatment of the spinal cervical diseases can be better achieved, and the pain brought by the operation to a patient can be reduced.

The invention discloses a total spondylectomy intercalated disc cutter, and relates to a surgical instrument for use in posterior spinal total spondylectomy. The total spondylectomy intercalated disc cutter is characterized in that a holding handle is arranged on the lower part behind a strip-shaped bracket; a blocking hook which is bent upwards is arranged at the front end of the bracket; a knife is arranged on the bracket; a tool bit at the front end of the knife can move forward and backward on the bracket, and the cutting edge of the tool bit corresponds to the blocking hook; when the blocking hook is pressed against one side of an intervertebral disc from the front side, the tool bit of the knife can be used for finishing cutting of the same side of the intervertebral disc forwards; when the blocking hook is pressed against the other opposite side of the intervertebral disc from the front side, the tool bit of the knife can be used for finishing cutting of the other opposite side on the same cutting plane of the intervertebral disc forwards, thereby finishing cutting of the whole intervertebral disc. By adopting the total spondylectomy intercalated disc cutter, possible surgical risk caused by the conventional instrument can be avoided, and the surgery time is shortened.

The invention discloses a drug for treating lumbar intervertebral disc herniation with pain. The drug consists of the following ingredients in portions by weight: 20-40 portions of carthamus tinctorius, 20-40 portions of cortex acanthopanacis, 10-30 portions of rhizoma alpiniae officinarum, 10-20 portions of Chinese angelica, 20-30 portions of caulis sinomenii, 20-40 portions of erythrina bark, 20-30 portions of rhizoma corydalis, 20-30 portions of codonopsis pilosula, 10-20 portions of cortex lycii radicis, 10-30 portions of radix aucklandiae, 20-40 portions of salvia miltiorrhiza, 20-40 portions of caulis trachelospermi, 10-20 portions of radix stephaniae tetrandrae, 20-40 portions of ligusticum wallichii, 10-30 portions of salt eucommia, 20-40 portions of cortex ailanthi, 20-40 portions of achyranthes bidentata, 20-40 portions of poria cocos, 20-40 portions of caulis piperis futokadsurae, 20-40 portions of radix clematidis and 10-20 portions of herba epimedii. The above medicines are added to 5000 portions of 30-40 DEG liquor to be sealed and stored for one month, and the liquor containing traditional Chinese medicine is poured out after dregs are removed. The curative effect of the drug is better than the curative effects of acupuncture and moxibustion, massage, acupoint injection and other traditional Chinese medicines.

The invention discloses an atrial septum shunting device for treating heart failure, which comprises an outer tube, the outer tube being a hollow tube, a first stop block and a second stop block being arranged at the far end of the inner cavity of the outer tube, and a spring being arranged between the first stop block and the second stop block; a tool bit conveying pipe, arranged in the hollow inner cavity of the outer pipe, the tool bit conveying pipe being also a hollow pipe, a cutting tool bit being arranged at the farthest end of the tool bit conveying pipe, a protruding part being arranged on the periphery of the tool bit conveying pipe, and the protruding part being located between the second stop block and the spring; a liquid bag catheter, arranged in the hollow inner cavity of the scalpel head conveying pipe, and a liquid bag being arranged on the liquid bag catheter; and an operating handle, the near end of the outer tube, the near end of the cutter head conveying tube and the near end of the liquid bag catheter being fixedly connected to the operating handle. According to the device, after expansion, the liquid bag and the support abut against one side of the atrial septum, the cutting tool bit cuts in from the other side of the atrial septum, a hole is punched in the position of the atrial septum, and then heart failure is effectively treated.

The invention discloses a telescopic scalpel for spine and a scalpel head. The telescopic scalpel comprises the scalpel head, a scalpel rod and a handle, wherein the scalpel rod and the handle are used for being connected with the scalpel head; the scalpel head comprises a switch arranged in an inner cavity of the handle, and comprises a first-stage electrode, a second-stage electrode and a third-stage electrode which are sequentially arranged in a nested mode from inside to outside; the outer side of the first-stage electrode is sleeved with an insulting cannula and the end part of the first-stage electrode is connected with an electric wire through a stainless steel needle core to obtain a power supply; the outer side of the stainless steel needle core is connected with a first insulating layer in an attached manner; the second-stage electrode and the first-stage electrode are connected or disconnected after stretching, so that different cutting loops are formed; the third-stage electrode is fixedly connected with the handle through a stainless steel tube II; and a movable gap I is reserved between the insulating cannula and the first insulating layer and a stainless steel tube I arranged outside the insulating cannula and the first insulating layer. The scalpel can adapt to cutting and treatment of various spine wound surfaces with different areas, the replacement of the scalpel in the spine operation process is reduced, the treatment time of the spine operation is shortened, and the cross infection is reduced.

The invention provides a suction catheter. The suction catheter comprises a suction component and a balloon component, wherein the suction component is provided with a suction cavity; the balloon component is arranged on the suction component in a sleeving mode; a balloon cavity is defined by the inner wall of the balloon component and the outer wall of the suction component jointly; at least onecirculation groove extending in the extending direction of the suction component is formed in the outer wall of the balloon component; the balloon component has a contraction state when no fluid is introduced into the balloon cavity and an expansion state after the fluid is introduced into the balloon cavity through an injection port; the groove walls of the circulation grooves are distributed inthe circumferential direction of the outer wall of the balloon component at intervals; and the circulation grooves keep through from the far end to the near end when the balloon component is in the expansion state. According to the suction catheter, the circulation grooves are formed in the outer wall of the balloon component, so that when the balloon component is in the expansion state and the outer wall of the balloon component is attached to the wall of blood vessel, blood can continuously flow through the circulation grooves which are through from far to near, blood vessel blockage is prevented, normal blood supply of myocardium is guaranteed, and surgical risks are reduced.

The invention provides an application method of a composite columnar balloon prostatic splitting catheter with an anteceding inner balloon. By employing double positioning, to be specific, first positioning of a positioning protrusion and second positioning of the inner balloon, it is possible to more precisely insert the prostatic splitting catheter in position, and surgical risk due to insertion positional deviation of the prostatic splitting catheter is avoided; by using the prostatic splitting catheter with the anteceding inner balloon, operation difficulty is reduced, and positioning accuracy is improved; by employing gradient pressurizing of the inner balloon and an outer balloon, it is possible to effectively relieve the pain in a patient and significantly enhance splitting effect.

The invention discloses an inserting part of an endoscope, comprising an endoscope body and an operation tool installed on the endoscope body. The operation tool is hard, and has the functions of bluntly separating, moving and actually cutting on a tissue structure in a projection scope of an optical lighting system in the endoscope body. The inserting part of the endoscope can be extended into the angle of the anterior chamber of an eye through a cornea cut to conduct operations such as separating, cutting and foreign matter-taking out on the angle of the anterior chamber and the recess of achamber angle, thereby separating the chamber angle under observation by the endoscope, greatly improving the availability and safety of closed-angle glaucoma, and providing a new choice for treatingforeign matter in chamber angle.

The invention discloses a 3D printed extensible tibial prosthesis, which comprises an inner prosthesis and an outer prosthesis, wherein the inner prosthesis and the outer prosthesis are separately prepared through printing by 3D printing equipment; the outer prosthesis sleeves the outer part of the inner prosthesis; the inner prosthesis and the outer prosthesis are glidingly connected through a one-way clamp buckle; a plurality of holes I and fixing plates I are arranged at two ends of the inner prosthesis; a plurality of holes II and fixing plates II are arranged at two ends of the outer prosthesis; and a plurality of threaded holes are formed in each of the fixing plates I and the fixing plates II. A manufacturing method of the 3D printed extensible tibial prosthesis comprises the following steps of performing double-lower-limb crus CT scanning on a patient; building a double-side tibial 3D model of the patient; confirming a prosthesis replacement region; and printing the prosthesis.The 3D printed extensible tibial prosthesis and the method have the advantages that the operation risk is low; the bone growth speed is precisely controllable; the operation time is short; the pain feeling of the patient is slight; the bone ingrowth can be induced by the fusion prosthesis surface of the prosthesis and the bone; after the fusion of the prosthesis with the long bone, the intensityis reliable; the wound appearance is good; the postoperative care is simple; the operative complications are few; and general expenses in the perioperative period can be obviously reduced.

The invention discloses a surgical robot energy apparatus control system and an energy apparatus control method. The surgical robot energy apparatus control system and the energy apparatus control method are used for achieving remote control over an energy apparatus in a surgical robot. The control system comprises main control equipment, a router, a first control panel and the energy apparatus. When the main control equipment receives a control instruction for controlling the motion of the energy apparatus, through the router, the control instruction is sent to the first control panel, the first control panel analyzes the control instruction as a control signal, the state of M output interfaces is controlled according to the control signal, the state of the output interfaces includes opening or closing, and the control signal is sent to the energy apparatus through the output interfaces in the opening state so that the energy apparatus can execute the control instruction according to the control signal and the output interfaces in the opening state.

The invention discloses a serum-free umbilical cord mesenchymal stem cell composition and application thereof. The composition comprises umbilical cord mesenchymal stem cells, a human albumin solutionand a sodium chloride solution, wherein the mass fraction of the sodium chloride solution is 0.9%, and the umbilical cord mesenchymal stem cell composition is applied to preparing medicines for treating or preventing osteoarthritis. In this way, according to the umbilical cord mesenchymal stem cell composition and application thereof, an optimized preparation volume and a component concentrationare adopted, the umbilical cord mesenchymal stem cells are combined with sodium chloride to prepare an injection, and osteoarthritis injury can be treated under the condition that the low injection amount is about 3-6 ml.

The invention relates to a thrombus extraction system for treating a large-size thrombus and a use method thereof. The thrombus extraction system comprises a self-expansion stent, a first connecting pipe, a connecting rod, an extension line, a pressing block and a handle; the self-expansion stent, the first connecting pipe, the connecting rod, the extension line and the pressing block are sequentially connected from left to right; and the extension line is sleeved with the handle. The use method of the thrombus extraction system comprises steps: sending a guide wire to a thrombus position; sending a micro-catheter to the far end of the thrombus; removing the guide wire from the micro-catheter; when inserting a cannula into half of a hemostasis valve, loosening the hemostasis valve; sending the cannula to an interface of the micro-catheter; tightening the hemostasis valve; sending the self-expansion stent into the micro-catheter; taking down the cannula; controlling and pushing the extension line by the handle; retracting the micro-catheter; releasing the self-expansion stent; embedding the thrombus with the self-expansion stent;l drawing out the self-expansion stent and the micro-catheter; carrying out negative pressure suction on the micro-catheter by an injector; enabling the micro-catheter to enter a long sheath tube; turning off the hemostasis valve; and drawing out the self-expansion stent, the micro-catheter and the hemostasis valve to complete thrombus extraction.