89results about How to "Ensure surgical safety" patented technology

The invention relates to a combined electrotome which comprises a cutter head part, a hose part and a handle part, wherein the cutter head part comprises at least two or more than two cutter heads which can relatively move or rotate, and each cutter head is connected with a cutter rod; the hose part comprises an insulation outer tube, wherein at least one spindle made of a conductor material penetrates through the insulation outer tube, one end of the spindle is connected with the handle part which is used for controlling the spindle to move, and the other end of the spindle is connected with a cutter bar which is driven to move by the spindle; the handle part comprises a handle, wherein at least one sliding handle is arranged on the handle, the sliding handle is connected with the spindle which is driven by the sliding handle to control at least one cutter to move, so that at least one cutter or cutter bar is exposed or contained, and a cable connector which is connected with a high-frequency power source is further arranged on the sliding handle. The combined electrotome has the advantages that a doctor can select an appropriate electrotome type to safely and quickly complete an operation, so that the operation safety of a patient can be greatly guaranteed, and the pain of the patient is relieved.

The invention provides an electric intra-cavity incision anastomat with an emergent tool retracting device. The anastomat solves the technical problems that an existing electric intra-cavity incision anastomat can not operate due to accidental shutdown of a motor, and as a result, the anastomat can not be taken out. The anastomat is provided with an anastomat body. The anastomat body is provided with a jaw, a sleeve, a closing handle, a fixed handle, an end gear, a transmission gear and a rack. The transmission gear can be meshed with the end gear and the rack. A hinge pin is arranged in the transmission gear. A spring is arranged on the hinge pin. The emergent tool retracting device is provided with a manual tool retracting instrument, a transmission gear pressing block and a tool retracting gear. The tool retracting gear is meshed with the rack. The anastomat is widely applied to the medical field.

The invention discloses an endoscope tie gun and an application method thereof, which can be applied in the medical field. A medical lashing band is utilized to bind disease carrier tissues. The gun body of the tie gun comprises a gun handle, a gun head and a long gun barrel which can penetrate into a disease carrier, wherein a similar T-shaped trigger structure is arranged in front of the gun handle of the gun body and is provided with a transverse transmission chute which can be matched with a raised line arranged on the long gun barrel of the gun body to realize transverse reciprocating dragging between the trigger structure and the gun body. The invention has the beneficial effect that the direct dragging transverse transmission is adopted between the gun handle of the endoscope tie gun and the trigger; the invention has the characteristics of reasonable design, simple structure, convenient operation, favorable binding effect and the like; a cutter can cut off a ribbon according to the practical used length, has reliable ligation effect and especially has better fastening and ligation effect on thicker ligation objects. Because of directly aiming at minimal invasion or endoscope operations, the invention has direct and obvious effect, solves the problem that binding grows out of nothing, saves operation time, further perfects minimal invasion idea and provides further guarantee for operation safety.

The invention discloses a full-longitudinal ultrasonic surgical system, which comprises an ultrasonic generator and an ultrasonic surgical tool. The ultrasonic surgical tool works by using a front end face of a working head, and the cutting direction of the ultrasonic surgical tool is consistent with the axial amplitude direction of the front end face. The full-longitudinal ultrasonic surgical system also comprises a restraint device for tissues to be cut. The restraint device defines the tissues to be cut in front of the cutting direction of the working head of the ultrasonic surgical tool. The foremost end face of a surgical instrument executing end is used for cutting / coagulating the tissues, and the stable quality for cutting and coagulating can be guaranteed by using the stable amplitude at the front end of the working head. The cutting direction during working is consistent with the transmission direction of the ultrasonic energy, and the cutting direction is positioned just on a direct path of the ultrasonic spreading direction, so that the cutting efficiency is improved. The working length of the surgical instrument is unlimited; and the working head is positioned in an external sleeve before cutting, so the clamp and dissociation under the non-cutting condition can be realized by using two clamp arms without any other instrument, and the surgical efficiency is obviously improved.

The invention discloses a gynecological operation table, which comprises a bed plate for carrying a human body, a bed frame on which the bed plate is mounted and frame leg devices arranged on two sides at the tail end of the bed frame, wherein the bed plate has a back part bed plate for carrying the head part and back part of the human body, a hip part bed plate for carrying the hip part of the human body and a leg part bed plate for carrying the leg parts of the human body, wherein the leg part bed plate has two driving devices which are mounted on the bed frame for driving the leg part bed plate to perform vertical lifting motion and horizontal translating motion relative to the hip part bed plate. In the gynecological operation table, the leg part bed plate is connected with the bed frame into a whole through the driving devices and can move under the control of the driving devices, so that the gynecological operation table can make shift between an operation table functional mode and a rest bed functional mode automatically, and the drawback that the gynecological operation table in the prior art needs manual operation is overcome.

The invention discloses a full-longitudinal ultrasonic surgical system, which comprises an ultrasonic generator and an ultrasonic surgical tool. The ultrasonic surgical tool works by using a front end face of a working head, and the cutting direction of the ultrasonic surgical tool is consistent with the axial amplitude direction of the front end face. The full-longitudinal ultrasonic surgical system also comprises a restraint device for tissues to be cut. The restraint device defines the tissues to be cut in front of the cutting direction of the working head of the ultrasonic surgical tool. The foremost end face of a surgical instrument executing end is used for cutting / coagulating the tissues, and the stable quality for cutting and coagulating can be guaranteed by using the stable amplitude at the front end of the working head. The cutting direction during working is consistent with the transmission direction of the ultrasonic energy, and the cutting direction is positioned just on a direct path of the ultrasonic spreading direction, so that the cutting efficiency is improved. The working length of the surgical instrument is unlimited; and the working head is positioned in an external sleeve before cutting, so the clamp and dissociation under the non-cutting condition can be realized by using two clamp arms without any other instrument, and the surgical efficiency is obviously improved.

The invention discloses multi-focal-depth and multi-spectrum-section laparoscope three-dimensional monitoring equipment which comprises a three-dimensional laparoscope with a double-light-path parallel image pickup system, and the three-dimensional display system. The three-dimensional display system comprises a three-dimensional display device and three-dimensional polarization glasses. The three-dimensional laparoscope comprises a laparoscope shell and a double-light-path image pickup system disposed in the laparoscope shell. A multi-spectrum transmitting source and a lens are disposed between the two light paths of the double-light-path image pickup system. Light waves transmitted by the multi-spectrum transmitting source passes the lens to form parallel light, and the parallel light is combined with the double-light-path image pickup system to form the double-light-path parallel image pickup system. A light transmitting bundle socket is further disposed inside the laparoscope shell and used for being connected with an external image collecting and processing system to alternately display the left-eye surgery images and the right-eye surgery images, picked up by the double-light-path parallel image pickup system, in the three-dimensional display device.

The invention provides a pedicle operation guide plate optimal screw placement path intelligent generation method. The method comprises the steps: S1, a two-dimensional CT scanning image for vertebrais acquired; S2, according to the two-dimensional CT scanning image, a closed three-dimensional network model for the vertebra is rebuilt in a three-dimensional mode, and a closed curved surface is formed; S3, a vertebra screw placement path set optimal model with the optimal length as a target is built; and S4, the set optimal model is solved by using a Lagrange multiplier method, and the optimalscrew placement path is acquired. According to the pedicle screw placement path generation method provided by the invention, the automatic optimal screw placement path generation problem is solved, and as for a given vertebra three-dimensional digital geometric model, based on the user requirements, on the premise of ensuring the operation safety, the longest screw placement path can be generatedautomatically.

The invention relates to a puncture cannula device of a small laparoscope puncture outfit. A sealing assembly is mounted in an inner cavity of a puncture cannula, and a channel allowing a puncture needle to penetrate is formed in the vertical center of the puncture cannula; an air injection valve is mounted on the side wall of a puncture cannula seat and integrated with the puncture cannula. The puncture cannula further comprises the puncture cannula seat and a puncture positioning guide cover, the sealing assembly can be firmly fixed in an inner cavity formed between the puncture cannula seatand the puncture positioning guide cover by a connecting mechanism between the puncture cannula seat and the puncture positioning guide cover, the sealing assembly comprises a first sealing valve, asecond sealing valve and a sealing cover, and with adoption of a multi-stage sealing device, the sealing effect is good; a limiting structure is arranged between the puncture positioning guide cover and the puncture needle and can effectively prevent the puncture needle from shaking, the air injection valve and the puncture cannula seat are integrally formed, mounting stability is high, and the probability of air or liquid leakage is low. The puncture cannula device is specially designed for the puncture outfit with specification being 5 mm, and has the advantages of being convenient to mount,good in sealing effect, safe and reliable.

The invention relates to a laparoscope puncture outfit device. The device comprises a puncture sleeve and a puncture needle, and a channel for the puncture needle to penetrate through is arranged on the vertical center of the puncture sleeve and denoted as a puncture channel; when the device is in use, the puncture needle penetrates through the puncture channel, is inserted into the puncture sleeve, and extends out of the tail end of the puncture sleeve; an air filling valve is installed on the side wall of a puncture sleeve base and integrated with the puncture sleeve; the puncture sleeve comprises a puncture sleeve body and two levels of sealing devices, the puncture sleeve body comprises the puncture sleeve base and a sleeve body, the two levels of sealing devices are installed above the puncture sleeve base, and the sleeve body is installed below the puncture sleeve base; the air filling valve is installed on the side wall of the puncture sleeve base and integrated with the puncture sleeve. The laparoscope puncture outfit is light in overall structure and can effectively ensure a dynamic sealing effect in an operation process, it can be ensured that the an enterocoelia operation is conducted normally and fluency in an operation instrument movement process is high, the usage is convenient, and the device is safe and reliable.

A microwave ablation system includes a target management module, a needle passage management module, a thermal field calculation module, and an ablation parameter calculation module. The target area management module generates a three-dimensional model according to tumor image data, the needle passage management module can perform addition, deletion, modification and check operations on ablation parameters, the thermal field calculation module performs thermal field simulation according to the ablation parameters, and the ablation parameter calculation module calculates the ablation parametersaccording to the target area three-dimensional model and a simulation thermal field. The invention can provide an ablation scheme which is based on tumor conformity and can meet the requirements of different needle distribution numbers and needle distribution modes. The invention further provides a visualization module and an interaction module, so the man-machine interaction is facilitated, andthe ablation safety is guaranteed through visualization.

The invention relates to the technical field of medical instruments, in particular to a pressure adjusting device for a laparoscopic suction device. The pressure adjusting device comprises a casing, atelescopic hose installed at the upper end of the casing through a hose joint and the laparoscopic suction device installed at the other end of the telescopic hose. The lower end of the hose joint extends into the inner cavity of the casing and is connected to a negative pressure generating assembly through a first connecting pipe, and a pressure regulating device body is mounted on the side wallof the first connecting pipe. The pressure adjusting device overcomes the shortcomings in the prior art, is reasonable in design and compact in structure, and adjusts the negative pressure accordingto the pressure change inside the laparoscopic suction device through the PLC intelligent control. At the same time, the pipeline structure convenient to stretch is combined to stretch the device intothe abdominal cavity of a patient for a surgery, and the safety of the patient is effectively ensured.

The invention discloses an ultrasonic scalpel handle with a suction apparatus adjustable in flow rate and for a laparoscopic surgery, and relates to the field of surgical instruments, apparatuses or methods. The ultrasonic scalpel handle mainly comprises a multifunctional suction gun head tube, an ultrasonic scalpel gun head knob, a suction tube, an ultrasonic scalpel handle body, an ultrasonic scalpel head telescopic switch, a vent valve, a piston-type ultrasonic scalpel clamp-closing trigger, an ultrasonic scalpel firing trigger and a flow meter; the multifunctional suction gun head tube isintegrally connected with the ultrasonic scalpel handle body, and the suction tube is arranged inside and connected with the vent valve. The tail end of the suction tube is connected with a suction system. The ultrasonic scalpel handle has the advantages that through the combined functions of the piston-type ultrasonic scalpel clamp-closing trigger and the vent valve, the ultrasonic scalpel firingtrigger is triggered simultaneously, the suction system is started while an ultrasonic scalpel starts to work, accidents caused when the visual field gets lost due to the surgical smoke are avoided,and the ultrasonic scalpel draws back to the suction gun head tube to efficiently suck liquid in the abdominal cavity. The ultrasonic scalpel handle is simple in structure, convenient to process and use and suitable for clinical application and popularization.

The invention discloses a miniature automatic dental-preparation cutting device in an oral cavity. The device comprises a motor drive component, an optical path component and a monitor component, wherein an X galvanometer oscillating motor and a Y galvanometer oscillating motor in the motor drive component are arranged on an oscillating motor mounting seat; a linear motor is fixed on a linear motor mounting seat through a screw; the linear motor mounting seat is fixed on a mounting bottom plate; an X galvanometer plate in the optical path component is adhered to the X galvanometer oscillating motor, and a Y galvanometer plate is adhered to the Y galvanometer oscillating motor; a focusing lens is arranged on a lens mounting seat through a screw ring; a beam combiner is fixed on a beam combiner mounting seat through a screw; an industrial lens in the monitor component is connected to a CCD (charge coupled device) image sensor. The device can be used for cutting a tooth to shapes of various preparation bodies required in clinical application, and performing para-oral real-time monitor, so that the operation safety can be further guaranteed.

The invention relates to the technical field of medical instruments, in particular to a thoracoscopic lung fixation device, comprising a lung clamping tool and a chest wall fixing device. The lung clamping tool comprises left and right clips, and two clips are articulated through a spring column. The head end of the clip is provided with a clip head, the tail end of the clip is provided with a rack, and the left rack and the right rack are provided with fixed clamping teeth capable of engaging with each other. The tail end of the clip is provided with a slot. Suspension wires are respectivelyarranged at the left and right ends of the spring columns, and the suspension wires are spaced at intervals of 1-3 cm position with beads. The chest wall fixing device comprises an elastic pipe, an inner clasp ring and an outer clasp ring respectively fixed at two ends, and a plurality of clasp grooves are arranged on the surface of the outer clasp ring. The device can reduce lung movement causedby beating and breathing of the heart, greatly reduce the range of lung movement during thoracoscopic operation, avoid lung movement from interfering with the operation of a doctor, and provide further guarantee for fine operation and operation safety of the operation.

The invention discloses a sleeve tube for an arthroscope. The sleeve tube is used for the approaching protection of the arthroscope. The sleeve tube comprises an approaching end, a tube body and an outer end which are sequentially connected, a sealing passage is formed in the part between the tube body and the outer end, the approaching end and the outer end both extend towards the outer side of the tube body to form a flange structure with low flanges on both inner and outer sides, the approaching end and the outer end are embedded in both inner and outer layers of soft tissues respectively to fix the tube body in a soft tissue incision, and therefore a safe and stable entrance and exit for subsequent surgical instruments.

The invention discloses a minimally-invasive intervention ablation system with a control-type mechanical arm.The minimally-invasive intervention ablation system with the control-type mechanical arm comprises a central control unit, a positioning and imaging device and an ablation executing device.The central control unit comprises a positioning and imaging control unit and an ablation control unit, the positioning and imaging control unit controls the positioning and imaging device to form a lesion part image, and the dimension of the lesion part image is converted into displacement by the ablation control unit according to a preset procedure.The ablation executing device comprises a main machine, the mechanical arm arranged on the main machine and an ablation needle positioned at the tail end of the mechanical arm, and the mechanical arm of the ablation executing device is positioned to the lesion part according to the displacement under control of the ablation control unit so as to perform radiofrequency ablation or microwave ablation on the lesion part image.The minimally-invasive intervention ablation system with the control-type mechanical arm has the advantages of capabilities of positioning the lesion part precisely and protecting doctors from being endangered by radiation and thoroughness in ablation.

The invention discloses a jawed clamp, mainly comprising a jaw, a shank, a 360-degree rotary wheel, a return spring, a fixing sleeve, a push handle, a fixed handle, a pin, a mandrel; the fixed handleis connected with the push handle via the pin; the tail end of the push handle is extended into the fixed handle; a gap of the push handle is in fitly contact with a fixing sleeve fitted in the fixedhandle; the other end of the fixing sleeve is connected with the mandrel; the mandrel is sleeved with the return spring abutted between the fixed handle and the fixing sleeve; the front end of the fixed handle is connected with the shank via the 360-degree rotary wheel, the front end of the shank is fitted with the jaw, and the mandrel is passed through the shank to drive the jaw. The jawed clampis simple in structure and convenient to use and operate, has high practicality, can clamp two vascular clips at a time, allows the two vascular clips to perform clipping and tying to arrive at hemostasis such that dual safety to prevent bleeding is achieved and surgical safety is ensured.

The invention provides an adjustable blood vessel blocker. The adjustable blood vessel blocker comprises a clamping body and a clamping sleeve part, the clamping body is provided with a plurality of first positioning parts, and the clamping sleeve part is provided with a second positioning part; when the clamping body is clamped on a blood vessel or tissue on the blood vessel or on the periphery of the blood vessel, the clamping sleeve part can be arranged on the clamping body in a sleeving mode; the second positioning part is matched with different first positioning part so as to adjust the relative position of the clamping sleeve part and a clamping part, and then the clamping force of the clamping part is adjusted.

The invention discloses a safety syringe, and relates to the technical field of medical equipment, solving the technical problem of avoiding the access of bubbles into coronary arteries. The syringe comprises an injection pipe, and a piston mounted in the injection pipe, wherein a left end pipe opening of the injection pipe narrows in the radial direction to form an injection opening; the piston is fixed to core rods, the core rods extend to the right to the outside of the injection pipe; the safety syringe is characterized in that the left end surface of the piston is concave to the right. The safety syringe is applicable to coronary angiography, coronary angioplasty and other surgical injection agents.

The invention discloses a puncture needle propelling mechanical arm, which comprises a mechanical arm body, a propulsion device and an ablation needle. A shaft mechanical arm, the propulsion device includes a frame, and the frame is provided with a linear guide rail and a moving slide table, and the movable slide table can slide back and forth along the linear guide rail in the linear guide rail, and the ablation needle passes through the ablation needle holder Installed on the bottom of the moving slide table, the present invention also provides an ablation system including the aforementioned puncture needle propelling mechanical arm, which has the advantages of precise positioning of the lesion, complete ablation and resection, and at the same time protects doctors from radiation harm.

The invention discloses a laparoscopic vascular disconnector. The device includes a left tissue clamping device, a right tissue clamping device, a tissue clamp, central scissors of the clamping devices, a connecting rod, a fixed handle, a movable handle, a pincer barrel body, movable links, fixed links and tissue clamp fixing grooves. When laparoscopic vascular cutting operation techniques are conducted with the laparoscopic vascular disconnector, the two sides of a blood vessel can be quickly clamped with the tissue clamp, after it is ensured that the blood vessel is clamped definitely and completely, the device is pushed forward, the central scissors of the clamping devices can cut the blood vessel off quickly, the operation time is saved, and the tissue clamp is firm and cannot slip. Meanwhile, according to the cut end of the tissue, it is judged whether the tissue is the blood vessel, a bile duct or other tissue, it is prevented that when an electric knife, an ultrasonic knife or an energy platform is used for cutting off the tissue, which kind of the tissue is cannot be determined, and the problem of rebleeding after thick blood vessels are cut is solved; through clinical practice, the device is convenient, quick and flexible for the operation techniques, and the operation safety is effectively improved.

The invention discloses an endoscope operation trolley, which comprises a frame, a placing table, an annular hook frame, an instrument storage drawer, an instrument pipeline placing basket and a control host. Wherein, the placing table is installed on the top of the frame, and handles are arranged on three sides of the placing table; the instrument pipeline placing basket is arranged on the tabletop of the placing table; An annular hook frame is installed on one corner of the frame; the control host is installed in a control host cabinet arranged on the frame, and the instrument storage drawer is installed in the frame through a slide rail; Fingerprint locks capable of locking the instrument storage drawer and the panel of the control host cabinet are both provided, and a weight sensor isarranged on the bottom plate of the instrument storage drawer, and both the fingerprint locks and the weight sensor are electrically connected to the control host. The invention provides an endoscopeoperation trolley, which can solve the above-mentioned existing defects, classify and place disposable instruments, endoscope pipelines and the like needed in endoscope operation, and avoid instrument pollution.

The invention discloses a tube side wall scissors and forceps set comprising tissue scissors and clamping forceps. The tissue scissors comprise a first tool arm and a second tool arm which are hinged into a whole through a first hinge shaft, and a first blade and a second blade are arranged at the front ends of the first tool arm and the second tool arm respectively. The clamping forceps comprise a first forceps arm and a second forceps arm hinged into a whole through a second hinge shaft, and the first hinge shaft and the second hinge shaft are arranged in an up-down corresponding manner and connected into a whole in a screwed manner through an adjusting bolt. A locating sleeve is arranged on each of the first and second tool arms in a penetrating manner. The first forceps arm and the second forceps arm are connected with the first tool arm and the second tool arm respectively through the locating sleeves. A locking structure is arranged between the first forceps arm and the second forceps arm. A first forceps tip and a second forceps tip bending in the same direction are arranged at the front ends of the first forceps arm and the second forceps arm respectively. The tube side wall scissors and forceps set have clamping effect and shearing effect at the same time, the tissue scissors and the clamping forceps are arranged in a vertically spaced manner, and the distance between the tube residual ends is assured; the tissue scissors and the clamping forceps are removable, so that gravity to tubes during suturing is alleviated, overturn of tube sutured openings is avoided, and suturing quality is assured.

The invention provides a lumbar vertebra segment internal fixation mode simulation method and system based on deep learning. The method comprises the following steps: acquiring a CT lumbar vertebra segment scanning image; segmenting the obtained CT lumbar vertebra segment scanning image to obtain a vertebral body structure image; reconstructing a three-dimensional vertebral body model based on the segmented vertebral body structure and carrying out preprocessing; on the basis of the preprocessed three-dimensional vertebral body model, adding and assembling lumbar vertebra segment components to obtain a fixed three-dimensional lumbar vertebra segment model; on the basis of the three-dimensional lumbar segment model, carrying out grid division on the components of the model; carrying out finite element analysis on the basis of the three-dimensional lumbar segment model subjected to grid division to obtain a simulation result of a lumbar segment internal fixation mode; according to the method, the deep learning U-Net network is used for segmenting the image, the current situation that image annotation is troublesome and laborious is improved to a great extent, and a more accurate three-dimensional vertebral body model can be obtained.

The invention discloses an automatic flow control method of a perfusion suction system. The perfusion suction system comprises a main control unit, a perfusion device, a suction device, an endoscope sheath and a cavity pressure sensor, wherein a perfusion flow sensor is arranged on a hose of the perfusion device, and a suction flow sensor is provided on a suction tube of the suction device. The automatic flow control method comprises the following steps: S1, presetting at least intracavity pressure, intracavity volume, perfusion flow, suction flow and suction pressure, and then starting to work; S2, at the beginning, the perfusion device starts to work, liquid enters a cavity of a patient through the endoscope sheath, at this time, the suction device does not work, and when one of the intracavity pressure and the intracavity volume reaches the set value, the suction device starts to work; and S3, when one of the intracavity pressure and the intracavity volume reaches the set value, thesuction flow and the perfusion flow automatically enter a synchronous state, namely the suction flow and the perfusion flow are equal. The perfusion flow and the suction flow are in a dynamic adjustment process, the liquid is always flowing, and operation safety is ensured.

The invention provides a method and system for assisting in recognizing submucosal blood vessels under an endoscope, and belongs to the technical field of blood vessel recognition. The method comprises the steps that a time sequence image, collected in real time, of a to-be-detected part is preprocessed, and the pixel value of the time sequence image is converted into a zero mean value and a unit variance; based on the imaging type photoplethysmography technology, blood volume waves are extracted from the preprocessed time sequence images, and the corresponding blood volume fluctuation frequency is determined; based on an imaging type photoplethysmography technology, a pixel change value of each pixel point is extracted from the preprocessed time sequence image, and a pixel fluctuation frequency of the corresponding pixel point is determined; and according to the blood volume wave, the blood volume fluctuation frequency, the pixel change value and the pixel fluctuation frequency, the submucosal blood vessel coverage area is determined. According to the method, in the operation process of the endoscope, on the premise that no extra equipment is used and the operation time is not prolonged, alimentary canal blood flow information can be accurately extracted in real time, submucosal blood vessels can be accurately recognized, and operation safety is guaranteed.

The invention relates to the field of medical apparatus and instruments, and discloses a sternum spreader special for surgical department ventricular septal defect occlusion surgery, which comprises arack plate and a sternum spreading part vertically mounted on the rack plate, the sternum spreading part comprises a fixed part and a movable part, the fixed part is fixedly connected to the end partof the right side of the rack plate, and the movable piece is connected to the rack plate in a sleeving mode and can move in the length direction of the rack plate. A first baffle is installed at theend, away from the rack plate, of the fixed part, a second baffle is installed at the end, away from the rack plate, of the movable part, and an included angle ranging from 15 degrees to 45 degrees is formed between the first baffle and the second baffle. The sternum dilator can dilate a large-angle surgical field under the condition that a sternum is dilated by a small angle, and sternum ribs can be protected against fracture injury during an operation.

The invention belongs to the technical field of medical treatment articles and discloses an artery-vein puncture needle with novel structure and functions. The artery-vein puncture needle is providedwith an injection pipe, a thermal insulation cotton cushion, a rubber sleeve, a thin thread, a protecting cover, a syringe needle, a phosphorescent band and a plastic cavity, wherein the lower part ofthe injection pipe is wound with the thermal insulation cotton cushion; the left end of the rubber sleeve is connected with the protecting cover through the thin thread; the syringe needle is coveredwith the protecting cover; the protecting cover is wound with the phosphorescent band; and the right end of the rubber sleeve is connected with the plastic cavity through the thin thread. According to the artery-vein puncture needle, the protecting cover and the syringe needle are connected together through the thin thread, so that the situation that a user is punctured by the exposed syringe needle after the protecting cover is lost is prevented; the temperature of liquid in the injection pipe is maintained by virtue of the thermal insulation cotton cushion, so that the situation that a patient feels uncomfortable when the medical liquid is too cold is prevented; the phosphorescent band is capable of emitting light at night, so that a medical worker can conveniently find blood vessels; and the syringe needle can be inserted into the plastic cavity so as to completely discharge residual liquid after the transfusion, so that the situation that the environmental health is influenced bythe residual liquid is prevented.

The invention provides an electromagnetic tracking base and an electromagnetic tracking system. The electromagnetic tracking base comprises a base body, at least three marking member mounting structures and an identity mounting structure are arranged on the base body, and the marking member mounting structures are nonlinear. The electromagnetic tracking base has the identity mounting structure andthe marking member mounting structures, an electromagnetic identity can be mounted by utilizing the identity mounting structure, and marking balls can be mounted by utilizing the marking member mounting structures, so that relative position relation between the marking balls and the electromagnetic identity is fixed; impact caused by outside environment is avoided, so that electromagnetic tracking positioning accuracy is improved.