450results about How to "Avoid medical malpractice" patented technology

The invention discloses a linear type suturing and excising device, comprising a body, a staple cartridge rack, a staple anvil, a staple cartridge, a cocking block and a knife pushing rod, wherein the staple cartridge rack, the staple anvil and the staple cartridge are arranged at the far end of the body, the cocking block is used for pushing a staple pushing piece and is arranged in a chute of the staple cartridge, the knife pushing rod pushes the cocking block to move, the staple cartridge rack is provided with a safety block for preventing secondary cocking, the safety block has a linear motion trail, the moving direction of the safety block is vertical to the moving direction of the knife pushing rod, and the safety block is arranged at the far end of the knife pushing rod and the excising knife, and is used for limiting the movement of the knife pushing rod and the excising knife from the near end of the linear suturing and excising device to the far end of the linear suturing and excising device when the linear type suturing and excising device is under the initial state and under the state of cocking completion. The linear type suturing and excising device has the beneficial effects that a doctor is effectively prevented from performing the next operation under the condition of not replacing a cocked staple cartridge, the occurrence of medical negligence is avoided, and the structure is simple and effective.

The invention provides an infusion calling automatic control and medical care management system. The system comprises hospital bed intelligent terminals, a doctor handheld terminal, a nurse handheld terminal, a central master control system for patient handheld terminals and a nurse station, wherein the hospital bed intelligent terminals are arranged on hospital beds and can accurately detect abnormal status information and give the alarm in the infusion process and simultaneously carry out the adjustment on the dropping speed automatically; in the non-infusion process, the hospital bed intelligent terminals can remind nurses of carrying out a nursing procedure on patients at regular time; the patient handheld terminals are used for sending the information to the hospital bed intelligent terminals; and the wireless communication among the doctor handheld terminal, the nurse handheld terminals and the hospital bed intelligent terminals is completed by the central master control system.The system is capable of accurately detecting the abnormal status information and giving the alarm in the infusion process and simultaneously adjusting the dropping speed automatically; the system iscapable of reminding the nurses of carrying out the nursing procedure on patients at regular time in the non-infusion process; the central master control system is used for managing the information of the patients and the information of medical care personnel and carrying out the real-time control and management on the plurality of hospital bed intelligent terminals.

The invention provides a surgical puncture path intelligent automatic planning method and system based on machine learning and a medical system. The surgical puncture path intelligent automatic planning method and system based on machine learning and the medical system can rapidly determine a surgical puncture path and a needle inserting point position and can allow a brain stereotaxic apparatus or a medical mechanical arm to achieve automatic puncture surgery operation. The planning method comprises the following steps that (1) sample image data of an existing case are acquired, and trainingdata and test data are made; (2) a three-dimensional segmentation deep neural network model is designed, and the three-dimensional segmentation deep neural network model is trained; (3) the sample image data of a patient are segmented and identified by using the trained three-dimensional segmentation deep neural network model; (4) a three-dimensional model is constructed based on a segmentation identification result and the sample image data; (5) a safe needle insertion constraint area is determined based on the target point position and medical prior information; and (6), in the safe needle insertion constraint area, a three-dimensional space trajectory planning algorithm is utilized to complete surgical puncture path planning.

The invention provides a circular tube-type anastomat. The circular tube-type anastomat comprises a shell, a nail anvil pull rod, a nail push rod, a knob and a percussion handle, wherein the nail anvil pull rod is accommodated in the shell; the nail push rod is sheathed onto the nail anvil pull rod; the knob is connected with the near end of the shell so as to control the nail anvil pull rod to move; and the percussion handle is pivotally connected onto the shell and is abutted with the near end of the nail push rod. The circular tube-type anastomat also comprises a safety mechanism movably positioned in the shell so as to limit the movement of the percussion handle. The safety mechanism comprises a locking piece, a safety block and a torsional spring, wherein the locking piece can be abutted with or separated from the percussion handle; the safety block is relatively arranged on the near end of the locking piece; and the torsional spring is connected with the locking piece and the safety block. The nail anvil pull rod is provided with a stay rod pin, and the safety block is provided with a shifting chute matched with the stay rod pin. When the knob is rotated to a percussion position, the locking piece is separated from the percussion handle. According to the circular tube-type anastomat provided by the invention, mistake percussion can be effectively prevented from occurring, so that surgical procedures are simpler and more convenient.

The invention relates to an in-hospital intelligent nursing system. The system comprises an intelligent transfusion monitoring device, a miniature vital sign wireless monitor, a base station, a monitoring center server, an nurse work panel and a patient mobile terminal; the intelligent transfusion monitoring device collects transfusion information, the miniature vital sign wireless monitor collects vital sign information and sends the information to the base station, and the base station sends the information to the monitoring center server; the nurse work panel receives the information sent by the monitoring center server, evaluates the condition of a patient regularly, pushes the information to the mobile terminal of the patient through the monitoring center server and receives a call service signal sent by the mobile terminal of the patient at the same time; the mobile terminal of the patient obtains the information pushed by the nurse work panel, a patient condition evaluation report and medical and service information pushed by the monitoring center server; the monitoring center server and the hospital information system are subjected to two-way information interaction. The system is simple in use method, and a larger amount of tedious workload in the nursing process is saved.

The invention relates to an automatic drop stopping alarming device for an infusion apparatus, which comprises a puncture outfit, a power assisted air sac, a connecting pipe of gas and liquid guiding and an upper cover of a liquid gathering pipe; among which, a connecting part and an elastic sealing sleeve are arranged at the lower interface of the liquid gathering pipe which is internally provided with a hollow floater, and the upper end and the lower end of the hollow floater are respectively provided with an upper guide bar and a conical plug which is provided with a lower guide bar at the lower end of the conical plug. The upper guide bar and the lower guide bar are respectively inserted into a guide hole and the connecting part on the upper cover of the liquid gathering pipe; the upper surface of the hollow floater is a conical surface and a magnetic body is arranged on the hollow floater; a sound-light alarming device internally provided with a reed switch or a magnetic switch is arranged outside the liquid gathering pipe; the reed switch or the magnetic switch is corresponding to a falling position of the magnetic body. The automatic drop stopping alarming device has the advantages that the alarming device is simple in structure and reliable in work; when the infusion is almost over, the infusion automatically stops and closes, and the vessels of the infusion patients do not have blood returning or take in air and have the function of automatic alarming, which facilitates patients and accompanying persons to get the information of infusion ending in time and the infusion apparatus can be turned off automatically immediately to prevent the occurrence of medical accidents.

The invention provides a medical intravenous infusion alarm. The medical intravenous infusion alarm comprises a detecting device and an alarming device. The medical intravenous infusion alarm is characterized in that the detecting device consists of an infrared emission tube and a photosensitive receiving tube; the alarming device comprises a microcontroller which is connected with an infrared tube, a light alarming circuit, a vibration alarming circuit and / or a voice alarming circuit. The detection method comprises the following steps of a) collecting voltage; b) determining reference voltage; c) determining threshold voltage; d) collecting voltage on real time; e) performing median filter; f) determining whether to reach the threshold voltage; g) changing the reference voltage; and h) emitting an alarming signal. According to the alarm and the detection method, the real-time reference voltage is utilized to avoid the influence of an infusion tube and static drops; the median filter method is carried out to remove the interference from bubble; the dynamic threshold voltage is utilized and prevents the influence of environmental change on threshold; whether the infusion tube is empty can be effectively detected.

The invention relates to a precise positioning and posing system for the radiation treatment of a cancer patient, and the system comprises an imaging device, a positioning bed and an image processingsystem. The imaging device is used for projecting an optical signal to a body surface area of a patient on the positioning bed or a treatment bed and receiving the optical signal, and converting the optical signal into an electrical signal. The image processing system performs image reconstruction and image matching of the received electric signal and moves the position of the treatment bed according to the matching result. The invention also relates to a method for accurately positioning and posing for radiation treatment of the cancer patient by using the system, thereby solving a problem that a current cancer positioning and posing method cannot meet the requirements of precise radiotherapy for position accuracy, repeatability and retrospectability.

The invention relates to a method and system for recommending a health diagnosis and treatment plan based on cloud computing. The method comprises the following steps: (1) a cloud server collects medical knowledge data and analyzes the medical knowledge data for storage; (2) a user terminal uploads a registered patient's electronic medical record to the cloud server, and the cloud server performspre-analysis of the patient's health condition; and (3) the user terminal uploads the current symptom of the patient to the cloud server, and the cloud server formulates the health diagnosis and treatment plan according to the current symptoms of the patient on the basis of medical knowledge data, pre-analysis data and the basic situation when the patient registers, and outputs one or more recommended diagnosis and treatment plan. Meanwhile, the invention also provides the system for recommending the health diagnosis and treatment plan based on the cloud computing. The method and system provide convenience for the patient to timely know the treatment, prevention and nursing method which can be adopted, avoids occurrence of medical accidents due to adoption of an outmoded diagnosis and treatment method by a doctor, effectively reduces the misdiagnosis rate and raises the working efficiency.

The invention discloses a medical trolley device. The medical trolley device comprises a trolley body, wherein the trolley body is of a hollow structure; universal wheels are fixedly mounted at four corners of the bottom part of the vehicle body; corresponding ends of a plurality of springs are fixed on a bottom inner wall of the vehicle body; the other ends of the springs are fixedly connected with a first support plate; a drug box is movably placed on the top of the first support plate; a handle is fixedly mounted on the side surface of one side of the drug box and extends to the outer partof the vehicle body; a mounting plate is fixed on the top part of the drug box; a mounting groove is formed in the mounting plate; a threaded rod is placed in the mounting groove of the mounting plate; a circular disc handle is fixedly mounted at one end of the threaded rod; a limiting block is fixedly mounted in the middle of the threaded rod; connecting blocks are both arranged on the two sidesof the limiting block and are in threaded connection to the threaded rod in a sleeving manner; the corresponding connecting block is hinged to one end of each connecting rod, and the other end of eachconnecting rod is hinged to a corresponding fixed block. The medical trolley device has a simple structure, is reasonable in design, is convenient for medical staffs to use, and is suitable for beingpopularized and used.

The invention discloses a capacitance infusion monitoring method and device. The method and device are used for detecting the infusion state (infusion speed, abnormal interrupt and infusion finishing) of an infusion device. The infusion device comprises a dropper and an infusion pipeline. The capacitance measuring method infusion monitoring device comprises a capacitor, a capacitance sensor and a controller. The capacitor is connected with the controller through the capacitance sensor. The capacitor is composed of two capacitor polar plates arranged on the two sides of the dropper of the infusion device respectively. The capacitance sensor is used for collecting the capacitance value between the two capacitor polar plates and sending the capacitance value to the controller. The controller obtains the infusion state according to changes of the capacitance value. According to the technical scheme, the simple capacitor is adopted to serve as a measuring device, the structure is simple, sensitivity is high, and the infusion state can be monitored in real time.

The invention provides an automatic fluid preparation system for blood purification and a use method thereof. The system is provided with a fluid absorption pump, wherein concentrate is pumped by the fluid absorption pump from a concentrate vessel, is delivered to a liquid pipeline through a pipeline so as to mix with reverse osmosis water to form a mixed solution; the ion concentration of the mixed solution is detected by an ion concentration sensor, and is compared with a concentration target parameter value, if the concentration exceeds the standard, an alarm is given out, otherwise the rotating speed of the fluid absorption pump is regulated to control concentration pumping flow rate; and meanwhile, the rotating speed is compared with an alarm threshold value, an alarm is given out if the rotating speed is abnormal, otherwise, a liquid loop is detected in real time continuously. The invention has the advantages that the system has the function of ion concentration online detection and feedback control, can regulate the rotating speed of the fluid absorption pump in real time, effectively avoids safety risks of hemodialysis, avoids mechanical failures of a motor, and has high fluid preparation speed, accurate concentration proportion, high stability and high reliability.

The invention discloses an infusion-bottle monitoring device. The infusion-bottle monitoring device comprises a medicine bottle, a hose, a liquid-storage dripping pipe, a thick needle pipe, a thin needle pipe and a flow adjuster, wherein the flow adjuster comprises a box body and a roller. The infusion-bottle monitoring device comprises a speed measuring mechanism, a motor and a remote controller, wherein the speed measuring mechanism is used for detecting the dripping speed of liquid medicine in the liquid-storage dripping pipe and sending data of the dripping speed in a wireless-signal manner, and is connected to the liquid-storage dripping pipe; and the motor is used for driving the roller to do reciprocating movement along the roller; the motor is in transmission connection with the roller by a transmission mechanism; and the remote controller is used for controlling the motor to work in a wireless manner, is in wireless connection with the speed measuring mechanism and is provided with a display screen, and the data of the dripping speed is displayed on the display screen. The infusion-bottle monitoring device disclosed by the invention has the advantages that a nurse controls the motor to work by the remote controller in a remote-wireless manner, and the roller moves along the box body, so that the purpose of adjusting the dripping speed is finally achieved and the operation is very convenient.

A robot-aided pelvis restoration system comprises a reset execution unit, a fixing unit, a supporting unit and a control unit, wherein the rest execution unit is fixed to the upper portion of the supporting unit, and the fixing unit is fixed to the front end of the reset execution unit and is fixedly connected with the supporting unit. The robot-aided pelvis restoration system aims at solving the problems of poor fracture reduction, large in operation strength of a doctor and large in quantity of rays radiated onto the doctor performing operation and a patient. In the robot-aided pelvis restoration system, the configuration of a rotary motion mechanism enable rotation errors output by the system to be smaller, and the system has the advantages of being high in mechanism accuracy, large in load and rigidity, reasonable in working space, compact in structure and the like and has wide application prospect in the technical field of medical instruments.

The invention discloses a nail bin of a medical anastomat and belongs to the technical field of medical instruments. The nail bin of the medical anastomat comprises a nail bin body, wherein the top surface of the nail bin body is provided with a knife push groove and a nail hole group composed of a plurality of nail hoes, and a plurality of first convex tables are arranged on the top surface of the nail bin body and located on two sides of the nail hole group. By means of the nail bin of the medical anastomat, displacement of cut tissues is avoided, cutting is convenient and quick, and anastomosis nails are molded in place.

The invention discloses a medical instrument cleaning and disinfection treatment device which comprises a shell. Supporting legs are fixedly connected to two sides of the bottom of the shell respectively, a water outlet valve is arranged at the bottom of the right side of the shell, a placement rack is fixedly connected in an inner cavity of the shell, and partition plates are fixedly connected tothe top of the placement rack. A water tank is fixedly connected to the right side of the shell, a water pump is fixedly connected to the top of the water tank, and a water outlet pipe is communicated with a water outlet of the water pump. By arrangement of the water tank, the water pump, a water outlet pipe, a circulation pipe, round nozzles, sterilization lamps, a supporting plate, a fan, a heating box, an air outlet pipe, supports, a heating plate, a motor, rotating fan blades and connection pipes, medical instruments can be cleaned and disinfected efficiently, time and energy of medical personnel are greatly saved, patient treatment efficiency of the medical personnel is improved, and timely eliminating germs on the medical instruments prevents cross infection of the germs and avoidsmedical accidents.

A timing, metering and charging device for oxygen delivery belongs to the technical field of medical equipment. The technical scheme is that the timing, metering and charging device comprises a gas pressure sensor, a temperature regulating device, a control device, a display device, a warning device and a communication device, wherein the gas pressure sensor and the temperature regulating device are arranged between an oxygen input end and an oxygen output end of oxygen delivery equipment; the gas pressure sensor transmits a pressure signal acquired and the temperature regulating device transmits an actual oxygen delivery temperature signal acquired to the control device; the control device is provided with two paths for outputting; one path outputs the oxygen delivery time, the oxygen flow and the oxygen consuming cost to the display device, and the other path outputs the oxygen flow to the warning device; the display device transmits the oxygen delivery time, the oxygen flow and the oxygen consuming cost and the warning device transmits a warning signal to the communication device. The timing, metering and charging device is used for detecting the oxygen supply amount and the oxygen supply time of the oxygen delivery equipment and calculating the oxygen delivery cost, and is convenient to use, high and accurate in data real-time performance, safe, and reliable.

The invention provides a novel bleeding stop system for surgery. The novel bleeding stop system comprises a horizontal rod, a frame device, a fixing device, a pushing device, a grabbing device, a moving device, a clamping device, an air bag device and an elastic device. The horizontal rod is provided with a first vertical rod, and the first vertical rod is provided with a first through hole. The frame device comprises a second vertical rod, a third vertical rod, a first transverse rod and a positioning rod. The fixing device comprises a fixing frame, a first inclined rod and a fourth vertical rod. The pushing device comprises a pushing rod, pressing blocks, a pushing block and first springs. The grabbing device comprises a grabbing rod and a first connection rod. The moving device comprises a moving rod, a trapezoidal block, a first supporting rod, an idler wheel, a sliding block and a first protruding block. The clamping device comprises a first clamping rod, a second clamping rod and a second spring. The air bag device comprises an air bag, a connection pipe and a pipe. The elastic device comprises a first support, a second supporting rod, a fixing ring, a second protruding block, a third spring and a fourth spring. By means of the novel bleeding stop system, surgery can be conducted easily, and occurrence of medical negligence is prevented.

The invention relates to a safe dropping transfusion and blood transfusion monitoring system which comprises a monitoring inductor, a management center controller and a terminal receiver. The monitoring inductor is used for real-timely monitoring transfusion conditions of a transfusion pipeline in a ward and then transmits the conditions to the management center controller, the management center controller performs control according to the transfusion conditions and sends a message to the terminal receiver held by a medical staff when transfusion is to be finished so as to allocate tasks, the medical staff goes to a corresponding hospital bed to perform processing according to the received message, and a processing result is returned. The safe dropping transfusion and blood transfusion monitoring system further comprises a signal enhancement relay station which is used for enhancing signal strength of a ward area and guaranteeing high-quality transmission of signals of the monitoring inductor and the management center controller. According to the safe dropping transfusion and blood transfusion monitoring system, whole-process monitoring of the transfusion can be achieved, and the problem that whether medical staffs timely process an alarm can not be monitored in prior art is effectively avoided.

The invention provides an indicating device of a stitching instrument with a knife. The indicating device comprises a fixing frame, a mobile indicating frame, an indicating window, an elastic piece, a connecting rope and a sliding clamping block. The fixing frame is arranged on a clamping plate of the stitching instrument with the knife. The mobile indicating frame is arranged on the fixing frame and can move relative to the fixing frame. The indicating window is connected with the fixing frame. The elastic piece is arranged on the fixing frame, and one end of the elastic piece is connected with the mobile indicating frame. The connecting rope is connected with the mobile indicating frame. The sliding clamping block is arranged in a screw bin frame of the stitching instrument with the knife. The sliding clamping block is provided with an elastic protrusion, and one end of the sliding clamping block is connected with the connecting rope. According to the stitching instrument with the knife, a cutting knife can touch the sliding clamping block after cutting, so that the mobile indicating frame moves, and accordingly an operator observes color changing from the indicating window and judges whether the cutting process is completed, the fact that the cutting process is completely over is guaranteed, and medical accidents are avoided. The invention further provides the stitching instrument with the knife, and the stitching instrument with the knife comprises the indicating device.

The invention relates to a regulator for micro-dose flow velocity, comprising an upper shell body, a core body and a low shell body. A liquid inlet pipe is arranged on the upper shell body; a retaining ring is arranged below the liquid inlet pipe on the upper shell body; a ring groove, the bore diameter of which increases gradually and the head and the tail of which are not communicated, is formed in the retaining ring; a liquid passing hole is formed in the core body; communication or closing between the liquid passing hole and the ring groove is realized by the mutual rotation of the upper shell body and the lower shell body; a liquid outlet pipe which is communicated with the liquid passing hole is arranged on the lower shell body; the cross section of the upper shell body is regular polygon; the outer ring at the lower shell body, which is contacted with the upper shell body, is regular polygon which fits the upper shell body; reticule is marked on the upper shell body; and corresponding flow scale marks are marked on each side of the regular polygon of the lower shell body. The regulator can accurately control the flow velocity and avoid misoperation. Regular polygon is designed to be distributed according to the characteristics of flow velocity. When the upper shell body rotates and two regular polygons mutually fit, the flow velocity is the scale mark value corresponding to the reticule. The use is safer and more reliable.

The invention discloses a position detection method of an injection pump sliding block. The method comprises the following steps: according to a preset function relationship between output voltage and relative distance, acquiring relative distances corresponding to output voltages of various Hall elements, wherein the relative distances mean distances between the Hall elements and a magnetic block; comparing and selecting the Hall element which keeps the minimum relative distance with the magnetic block, and using the Hall element as a reference Hall element; and according to the positional information of the reference Hall element on a reference board, acquiring the position of an injection pump sliding block component relative to the reference board. According to the invention, real-time detection on the position of the injection pump sliding block is achieved by virtue of the Hall elements and the magnetic block which are stable in performance and relatively low in cost, so that the completion of an injection task of an injector is detected in real time; and in the case of failure of the injection pump or residual dosage in the injector is insufficient, the injection pump is capable of raising alarm timely so as to inform doctors to avoid the occurrence of medical accidents.

The invention discloses a method and a system for controlling a nurse station host to answer calls differentially according to nursing levels. The method comprises the following steps that: after patients are admitted to hospital, the nursing levels are determined, and the determined nursing levels are stored and recorded in a storage chip; a plurality of extensions make calls; the nurse station host detects calling signals, discriminates the correspondences between calling numbers and the stored nursing levels of the patients, and calls originally-set levels of the calling numbers; the nurse station host ranks the received calling numbers according to a discrimination result; the nurse station host answersthe extensions in sequence according to a nursing level order; after the callis finished, a hang-up operation is performed; and the nurse station host circularly judges, performs answering / hang-up actions in sequence till the calling numbers of the extensions of sickbeds are processed. Through adoption of the method and the system, the patient call processing speed of medical staff can be increased. Meanwhile, the equipment operation flow of the medical staff can be simplified; the working efficiency can be increased; and the operation flow is simplified.

The invention discloses a linear suturing / cutting device, comprising a body, a nail cartridge frame and a nail anvil, wherein a nail cartridge is arranged on the nail cartridge frame; the nail anvil is connected with the nail cartridge frame in a pivot way; a cutter pushing rod pushes a cutter and a trigger block to move; a boss playing a role in insuring is arranged on the nail cartridge frame; an insuring block is arranged on the cutter in the pivot way; an elastic piece is arranged between the insuring block and the cutter; in a state of no external force, the elastic piece drives the insuring block to incline; at least one shoulder is arranged on the insuring block; the shoulders are arranged on the end face of the insuring block in a protruding way; when the cutter pushing rod pushes the cutter to move, the boss is located in the moving direction of the shoulders of the inclined insuring block; therefore the shoulders are withstood by the boss. The linear suturing / cutting device has the main beneficial effects of effectively preventing a doctor from implementing next operation under the circumstance of not replacing the triggered nail cartridge, preventing medical incidents from occurring and being simple and effective in structure.

The invention provides an external biochemical analyzer for a reaction disc signal sampling device, belonging to a medical apparatus; the invention comprises a reaction disc part arranged in a machine shell of the biochemical analyzer; the invention is characterized in that the reaction disc part comprises a bottom plate of the reaction disc(1), a reaction disc(2), a driving motor(3), a synchronous belt(4), a synchronous belt wheel(5), a shaft of the reaction disc(6), an insulation box of the reaction disc(7) and a reaction cup frame(8), wherein the reaction cup frame(8) is provided with a ring-shaped reaction cup groove(11), the outer side of which is provided with a light source entrance(12); eight optical fibers(17) matched with eight color filters have ends arranged in optical fiber mounting holes(13) and other ends penetrating the insulation box of the reaction disc(7) and fixed in eight corresponding optical fiber positioning sleeves(16) arranged on a signal plate fixing frame(15); the signal plate fixing frame(15) is fixed on the bottom plate of the reaction disc(1) and positioned on the outer side of the insulation box of the reaction disc(7). The external biochemical analyzer has the advantages of good pollution preventive effect and simple structure.

The invention discloses a mobile medical information platform based on intelligent medical treatment. The mobile medical information platform comprises a nurse end module, a patient end module and a doctor end module. A cloud platform and the nurse end module, the cloud platform and the patient end module, and the cloud platform and the doctor end module are connected by a wireless communication network. The mobile medical information platform based on the scientific and reasonable design is used safely and conveniently. With a handheld scanning terminal and a wristband barcode, the nurse cancarry out transfusion and patient checking on the patients accurately, so that occurrence of medical accidents caused by wrong patient information during the transfusion is avoided. Meanwhile, frequent inquiries are avoided; and the better resting environment is provided for the patients. On the basis of evaluation of the patient's vital signs, on the one hand, the vital sign information is used as the hospital discharge index of the patients and the dataization of the entire treatment process of the patient is realized, and the diseases situation can be obtained accurately for post-stage subsequent visiting; and on the other hand, the patients can obtain own disease information well, so that the concerns about the patient's condition by the family members of the patient is reduced.

The invention relates to a positioning device for in-situ windowing of an endovascular stent-graft. The positioning device comprises a push piece, a conveying sheath and a guiding wire, wherein a first through hole is formed in the push piece, a first magnetic piece is arranged at the first end of the push piece, and a guiding wire hole communicated with the first through hole is formed in the first magnetic piece; a second through hole is formed in the conveying sheath, a second magnetic piece is arranged at the first end of the conveying sheath, a third through hole communicated with the second through hole is formed in the second magnetic piece, and the first magnetic piece is connected with the second magnetic piece in a magnetic attracting manner; and the guiding wire is used for conveying the first magnetic piece and the second magnetic piece. The positioning device provided by the invention has the benefits as follows: after folding of the magnetic pieces, windowing is achieved through guided laser burning punching or a puncture needle method, the step of windowing is simplified, operating difficulty and risks are lowered, the operation time is saved, equipment customization is avoided, and moreover, the operation cost is lowered.

The invention discloses a method and apparatus for triggering an external diaphragm pacemaker by using a surface electromyogram signal as a synchronization signal. The method comprises the steps of 1) acquiring surface an electromyogram signal of inspiratory muscles; 2) conducting envelope calculation, using a root mean square algorithm for implementation, and using an envelope value greater than a threshold for indicating muscle contraction, the threshold being determined based on a mean value of envelope values in a certain period; and 3) generating a synchronization signal which can be used for triggering the signal output of an external diaphragm pacemaker. The invention improves the control accuracy by the above means, and triggers the external diaphragm pacemaker by using the surface electromyogram signal as the synchronization signal in a more stable way.