63 results about "Laryngeal part" patented technology

The invention discloses a bionic TENG sensor unit for an artificial throat and a preparation method thereof, and relates to the field of artificial throats, and the sensor unit comprises a gradient micro-dome friction layer, a strain amplification layer, an electrode layer and a back cavity substrate layer. The gradient micro-dome array realizes gradual contact through gradient change of height and diameter; the strain amplification layer converts vertical vibration into horizontal strain by using a cantilever beam-sliding block structure; the back cavity array selectively amplifies vibration at a specific frequency based on the Helmholtz resonance principle. The invention further provides a corresponding preparation method. The preparation method comprises the steps of back cavity forming, electrode deposition, microstructure manufacturing, surface treatment and the like. The sensor has the advantages of high sensitivity, good frequency selectivity and strong durability, and is particularly suitable for detecting weak laryngeal vibration signals of laryngeal patients.

The application discloses a vocal cord leukoplakia pathological detection method and system based on a laryngeal endoscope image, a device and a medium, and belongs to the field of data management. The method is as follows: inputting the acquired laryngeal endoscope image into a preset pathological semantic field model, performing feature extraction on the laryngeal endoscope image through the pathological semantic field model to obtain a feature map; performing coordinate mapping on coordinate points of the feature map through the pathological semantic field model, generating a pathological semantic vector corresponding to each coordinate point, and constructing a continuous pathological semantic field according to the pathological semantic vector; deploying a perception particle swarm in the feature image domain, and performing particle iterative motion according to the pathological semantic vector of the deployment position until a lesion contour is generated by meeting a convergence condition, and outputting a vocal cord leukoplakia pathological detection result according to the lesion contour. Therefore, by implementing the application, accurate detection of vocal cord leukoplakia pathology can be realized, and the accuracy and reliability of laryngeal precancerous lesion diagnosis can be improved.

The utility model relates to the technical field of medical instruments, and discloses an oxygen inhalation tube fixing mechanism for trachea surgery, which comprises a main body component, a fixing component and a fixing component, the main body component comprises a throat inlet tube and an oxygen supply tube, the oxygen supply tube is arranged at one end of the throat inlet tube, one end of the throat inlet tube is inserted into the trachea of a patient, and the other end of the oxygen supply tube is connected with oxygen supply equipment; the device is arranged on one side of the throat inlet pipe and comprises a clamping piece, the clamping piece comprises a cross-under ring, and two attaching blades are fixed to one side of the cross-under ring. By arranging the fixing assembly and using clamping and threaded connection modes, pressure cannot be caused to a laryngeal fistulization opening of a patient, unnecessary damage to the neck of the patient due to pressing and inserting errors between the throat inlet pipe and the oxygen supply pipe is avoided, and pain and discomfort of the patient are relieved.

This invention relates to the field of nursing technology for disabled individuals, and particularly to a method and device for identifying the risk of aspiration in disabled individuals. The method includes: establishing a multimodal, non-invasive data acquisition system to simultaneously collect temporal information on laryngeal vibration, respiratory status, and facial movements; preprocessing to extract effective signals; constructing an individual-specific physiological baseline model using historical normal physiological samples and binding it to the individual's identity; segmenting and processing real-time signals to construct a three-dimensional feature collaboration matrix, calculating mutual information entropy, and dynamically iterating the associated baseline; temporally aligning swallowing and respiratory abnormality anchor points, marking key intervals, and screening suspected risk events; and outputting the final aspiration risk identification result after environmental interference filtering, feature weight adaptation, and verification. This invention enables accurate, real-time identification and early warning of aspiration risk without requiring any wearable devices and without affecting the daily care and rest of disabled individuals.

The invention relates to an airway path planning method and device based on a throat CT image and computer equipment. The method comprises the following steps: acquiring a throat CT image; the throat CT image is preprocessed, the preprocessing includes unifying thickness parameters of the throat CT image, and data expansion processing is carried out on a target layer, including the glottis part, in the throat CT image with the consistent thickness parameters in a copying mode; inputting the preprocessed throat CT image into the trained three-dimensional segmentation model for three-dimensional segmentation to obtain a segmented airway three-dimensional structure; obtaining a path constraint condition according to the obstacle differentiation weights of different areas in the divided airway three-dimensional structure; layering treatment is carried out on the divided airway three-dimensional structure, and a multi-layer airway cross section is obtained; obtaining a center point sequence based on the center point coordinates of the cross sections of the multiple layers of airways; and obtaining an initial airway path corresponding to the throat CT image based on the target point in the airway, the center point sequence and the path constraint condition.

The application discloses a foldable intubation positioning auxiliary device for a pediatric anesthesia department, which comprises a bite plate in an arc shape, a tongue depressor is connected to the side wall of the bite plate through a rotary limiting device, the front end of the tongue depressor is arranged in a downward bending shape, a piezoelectric ceramic sheet is fixedly connected to the bottom side of the front end of the tongue depressor, an intubation opening is formed in the middle part of the bite plate and is arranged in a penetrating mode, a rotating wheel is rotatably connected to the intubation opening, a pressing block is connected to one side of the intubation opening through an elastic pressing device, and one side of the pressing block is close to the rotating wheel. The piezoelectric ceramic sheet is stimulated to vibrate at low intensity to stimulate the laryngeal muscles of a child during intubation by using a mild physical stimulation mode, the glottis is naturally opened, the precision, safety and convenience of intubation operation are improved, and the device is especially suitable for obese children patients with difficulty in glottis exposure.

The invention aims to provide a cerebral apoplexy swallowing assessment and extubation decision-making system based on ultrasound and video stream fusion, and the system comprises an ultrasound image collection module which focuses on the dynamic movement of tongue muscles, throat muscles, tongue bones and throat lacuna; the video stream acquisition module is used for calculating facial expression, oral activity and throat form change characteristics by using a motion tracking algorithm; the analysis module is used for analyzing spatial characteristics of muscle movement; identifying time sequence characteristics of the swallowing action; the evaluation and decision module is used for generating a swallowing function evaluation report; and the user interface and report output module is used for outputting an automatically generated swallowing function evaluation report to a clinician. The swallowing function can be evaluated in real time, noninvasively and accurately through a multi-modal data fusion technology in combination with a deep learning algorithm, a more reliable swallowing function evaluation basis is provided for clinicians, and rehabilitation treatment and intervention of stroke patients are helped.

The utility model relates to the technical field of laryngoscopes, in particular to an angle-adjustable self-retaining laryngoscope which comprises a laryngoscope tube, silica gel strips are adhered to the top and the rear side of the laryngoscope tube, an elastic steel bar is fixedly connected to an inner cavity of each silica gel strip, and the left side of a mounting vertical plate at the top is connected with a miniature camera and provided with a mounting hole through bolts. When the adjusting screw is rotated anticlockwise, the adjusting screw moves leftwards, the connecting transverse plate on the surface of the adjusting screw moves leftwards, the traction ropes on the two sides move leftwards, the left side of the laryngoscope tube bends upwards under the action of the elastic steel bar, when the adjusting screw is rotated clockwise, the traction ropes are tensioned rightwards, and the left side of the laryngoscope tube bends downwards. Similarly, the left side of the laryngoscope tube can be bent forwards or backwards by rotating the adjusting screw rod on the rear side according to the operation, so that the laryngoscope tube can be bent and adjusted up and down and back and forth, the throat of a patient can be supported conveniently, and medical staff can watch the laryngoscope conveniently.

The application discloses a kind of bionic TENG sensor unit for artificial throat and preparation method thereof, it is related to artificial throat field, the sensor unit includes gradient microdome friction layer, strain amplification layer, electrode layer and back cavity substrate layer.Gradient microdome array realizes progressive contact by the gradient change of height diameter;Strain amplification layer utilizes cantilever beam-sliding block structure to convert vertical vibration into horizontal strain;Back cavity array is selectively amplified to specific frequency vibration based on Helmholtz resonance principle.The application also provides a corresponding preparation method, including back cavity forming, electrode deposition, microstructure manufacturing and surface treatment and the like steps.The sensor has the advantages of high sensitivity, good frequency selectivity and strong durability, and is particularly suitable for detecting weak laryngeal vibration signals of laryngeal patients.

The invention relates to the technical field of atomizer regulation and control, in particular to a laryngeal medicine atomizer and an intelligent flow rate regulation and control system thereof. The system is used for determining a basic breathing state of a patient according to historical treatment information of the patient, and determining an initial atomization flow rate based on the basic breathing state; collecting real-time monitoring data, and determining an initial state normal degree index and a throat real-time stress degree index according to the real-time monitoring data; the initial atomization flow velocity is corrected according to the initial state normal degree index and the throat real-time stress degree index, and the corrected atomization flow velocity is obtained; and a control instruction is determined based on the corrected atomization flow speed, so that the atomizer outputs atomized medicine based on the control instruction. According to the invention, the accuracy of atomization flow rate control can be improved.

A cricothyroidotomy device configured for use in emergency airway procedures by a responder-provider, the device comprising a structure configured to cover and secure over the laryngeal skeleton region; an accessible opening for intubation; lateral fixation arms with pre-loaded fastening means; an integrated cutting element; and a mechanism configured to maintain traction during the procedure. Further provided are methods of using the device and a kit comprising the device.

The application discloses a kind of intelligent warehouse distribution and compliance management system and method for chronic medication, belong to the field of wisdom medical technology.System includes cloud platform, intelligent warehouse terminal, modular intelligent medicine box, wearable device and unmanned distribution terminal.Method is: cloud is through LSTM-Transformer hybrid network prediction patient future probability of missing and position trajectory, dynamically triggers warehouse terminal according to single dose encapsulation sub-warehouse;Distribution engine assigns unmanned terminal to advance sub-warehouse to patient predicted stop point;Intelligent medicine box combines weighing difference, swallowing sound identification, laryngeal movement and other multi-modal signals to make decision fusion, confirm real medicine taking and feedback optimization model.The application realizes the active warehouse distribution driven by prediction and multi-modal medicine taking confirmation closed loop, fundamentally solves the problem of missing and false compliance caused by going out etc., with intelligent, individualization and self-evolution ability.

The utility model discloses a rotatably adjustable laryngeal anesthesia tube, which comprises a main body unit and a medicine spraying unit, the main body unit comprises an outer tube, one end of the outer tube is provided with a spray head, the medicine spraying unit comprises a positioning plate I and a positioning plate II, the positioning plate I and the positioning plate II are respectively fixed at two ends of the outer tube, a guide tube I is arranged in the outer tube, and a guide tube II is arranged in the guide tube II. The first guide pipe penetrates through the first positioning plate and the second positioning plate and is fixed to the first positioning plate and the second positioning plate, a second guide pipe is arranged in the outer pipe, the spray head is installed at one end of the second guide pipe, and the end, away from the spray head, of the second guide pipe is fixed and communicated with a third guide pipe. A pulling rod is moved to pull a rope body, the rope body drives a winding disc to rotate after being pulled, the winding disc drives a third guide pipe and a spray head to rotate when rotating, so that the angle of the spray head is adjusted, the spray head can accurately anesthetize the local throat, in the process, a coil spring can be tensioned when the third guide pipe rotates, and after the spray head finishes spraying medicine, the spray head can rotate to drive the winding disc to rotate. And the loosening deflector rod drives the nozzle to rotate to an initial position under the resilience force of the coil spring.

The utility model discloses a spraying device for airway surface anesthesia during tracheal intubation, which comprises a shell, a pump system, a power supply system and a control system, the pump system, the power supply system and the control system are assembled in the shell, and the pump system is electrically connected with the power supply system through the control system; the liquid outlet system is assembled on the shell; the liquid outlet system comprises a liquid outlet pipe and a liquid storage bottle which are assembled on the shell, and a spray head assembled at the front end of the liquid outlet pipe; the liquid outlet pipe is communicated with the liquid storage bottle through the pump system; the visual system comprises an imaging lens arranged at the front end of the liquid outlet pipe and a first optical fiber arranged in the liquid outlet pipe; a WiFi module used for being in communication connection with external equipment and an image sensor used for processing an optical signal into an electric signal are arranged in the control system; the imaging lens is connected with the image sensor through the first optical fiber and is used for realizing optical signal transmission. The laryngeal anesthesia device not only can improve the safety and effectiveness of laryngeal anesthesia, but also can improve the convenience of clinical operation.

The utility model relates to the technical field of medical supplies, in particular to an anaesthetic laryngoscope which comprises a handle and a laryngeal opening rod, the handle is connected to the tail end of the laryngeal opening rod and is perpendicular to the laryngeal opening rod, one end, far away from the handle, of the laryngeal opening rod is provided with an arc-shaped tilting head tilting towards one side of the handle, and one side, back to the handle, of the tilting head is provided with an installation groove. A mounting groove is formed in the throat rod, a micro camera is mounted in the mounting groove, a waterproof lens is sealed at a notch of the mounting groove, a display is mounted at one end, far away from the throat rod, of the handle, and the micro camera transmits video signals to the display; one side, opposite to the handle, of the throat opening rod and one side, opposite to the handle, of the warped head are provided with a coherent pipe groove, and the pipe groove is used for containing a medicine feeding pipe. The medicine feeding device is easy and convenient to operate and capable of relieving damage to the throat and achieving accurate medicine feeding.

The present application relates to a kind of multi-dimension lock regulating airway management training model, comprising: neck range of motion adjustment unit, neck range of motion adjustment unit is used to simulate the normal activity state and activity limited state of neck;Tongue body swelling simulation unit, tongue body swelling simulation unit is used to simulate the natural state and different degrees of swelling state of tongue body;Glottic area stenosis simulation unit, glottic area stenosis simulation unit is used to simulate the natural open state and different degrees of stenosis state of glottic area;Multi-dimension lock regulating airway management training model is configured to: by independently adjusting neck range of motion adjustment unit, tongue body swelling simulation unit and glottic area stenosis simulation unit, the laryngeal view of model is presented as a plurality of preset states corresponding to different levels of difficult airway.The present application can simulate different levels of difficult airway scene, accurately restore the difficult airway caused by single factor or multi-factor superposition in clinic.

Electrode plates are used for detecting electromyographic signals of laryngeal muscles when a patient sounds, a plurality of groups of laryngeal muscle guiding devices drive the corresponding laryngeal muscles according to changes of the electromyographic signals of the laryngeal muscles and by means of precise traction of a micro servo motor, and the corresponding laryngeal muscles are driven by the laryngeal muscle guiding devices according to the preset stroke distance, frequency and speed. And stretching and contracting laryngeal muscle elastic relieving movement is performed to form linkage of electromyographic signal acquisition, laryngeal muscle feedback and re-acquisition. Meanwhile, a flow channel made of a heat conduction material is arranged at the position of the massage head in a matched mode, corresponding laryngeal muscles are stimulated through temperature changes of circulating liquid, the patient is guided to feel different state changes of the laryngeal muscles during sounding, the sounding changes caused by the changes are clearly recognized, and therefore new laryngeal muscle memory is formed.

The invention discloses a monitoring and evaluating system and method for postoperative recurrent laryngeal nerve function damage and recovery, and relates to the technical field of laryngeal nerve function evaluation. According to the method, a patient preoperative individualized neuromuscular vibration fingerprint baseline is constructed, postoperative neck muscle sound signals are converted into multi-dimensional computable features reflecting nerve discharge rhythm, muscle mechanics modality and nerve-muscle conduction coupling relation, and structural comparison is carried out under the reference of consubstantial stable topology; the recurrent laryngeal nerve function state is converted from subjective observation to objective quantification, the stability keeping degree of a neural control structure can be dynamically tracked under the non-invasive and continuous wearing conditions, neurogenic abnormality, myogenic change and normal function recovery trends are distinguished, and the recurrent laryngeal nerve function state can be accurately determined. The influence of individual anatomical differences, sound production habits and environmental noise on the evaluation result is remarkably reduced, and the sensitivity, repeatability and long-term trend judgment capability of postoperative function monitoring are improved.

The application provides a laryngeal image feature determination method and device and related equipment, which determines the area proportion feature of a target abnormal area based on the area of the target abnormal area and the size information of a narrow-band endoscopic image, obtains the first quantity proportion feature of abnormal microvessels in a microvessel segmentation map, the second quantity proportion feature of hollow microvessels in the abnormal microvessels, obtains the third quantity proportion feature of irregular shape microvessels in the microvessel segmentation map, obtains the abnormal microvessel aggregation degree feature, the microvessel density feature and the abnormal microvessel color quantization feature in the target abnormal area, and adds the area proportion feature, the first quantity proportion feature, the second quantity proportion feature, the third quantity proportion feature, the abnormal microvessel aggregation degree feature, the microvessel density feature and the abnormal microvessel color quantization feature to a preset laryngeal image feature set. The abnormal degree of the larynx of a patient is efficiently and accurately determined.

A throat ultrasound image segmentation method based on an RLCRau2net model comprises the steps that a throat ultrasound image is input and preprocessed, a Canny edge detection operator is used for extracting global edge information, the global edge information is spliced with an original image, feature extraction and recovery are carried out through an encoder-decoder architecture containing U2Bra Block, a residual block is used for increasing the network depth, the gradient disappearance problem is solved, and the throat ultrasound image segmentation method based on the RLCRau2net model is obtained. And generating and outputting a final segmentation result. According to the method, by using the RLCBreu2net model, stronger feature extraction capability, better noise robustness, clearer segmentation boundary and higher segmentation precision can be realized, and by gradually extracting low-level and high-level features of the image and paying attention to segmentation of edge information, the problem of effectively processing a complex structure in the ultrasonic image is solved, and the method has the advantages of being high in robustness and high in segmentation precision. The accuracy and robustness of segmentation are improved, stable convergence of the model in the training process can be ensured, and the generalization ability and segmentation performance of the model are improved.

The utility model relates to the technical field of anesthesia spraying, and discloses a laryngeal anesthesia spraying device which comprises a vertical plate seat, a horizontal plate seat is fixedly installed at the bottom of the vertical plate seat, storage boxes located on the two sides of the vertical plate seat are fixedly installed at the top of the horizontal plate seat, and a convenient cleaning mechanism is arranged on the right side of the vertical plate seat. And a medicament output mechanism is arranged on the left side of the vertical plate seat. By means of the design of the air pump, air can be conveyed into the inner cavity of the temporary storage cylinder, the sliding plate is pushed by air pressure to slide in the inner cavity of the temporary storage cylinder integrally, and then anesthetic is extruded out of the top of the temporary storage cylinder and conveyed to the throat of a patient, so that extraction through a pump machine is avoided, and the anesthetic extraction efficiency is improved. The problem that part of anesthetic remains in the pump machine and is inconvenient to clean is solved, the bottom plate can be detached from the bottom of the temporary storage barrel, the whole sliding plate can be detached from an inner cavity of the temporary storage barrel, the whole temporary storage barrel can be fully cleaned conveniently, and the effect of follow-up anesthesia work is guaranteed.

The invention relates to a vocal cord dynamic closing process mechanical track evaluation system, which belongs to the technical field of medical instruments and comprises a disposable probe assembly, a handheld signal processing handle and a data analysis and display host. The far end of the disposable probe assembly is provided with a wedge-shaped double-slope sensing head, the near end of the disposable probe assembly is provided with a multi-dimensional sensing module and a waterproof electrical interface, and the disposable probe assembly is used for collecting mechanical and motion signals in the vocal cord closing process. The hand-held signal processing handle is connected with the probe assembly, and a signal processing circuit is arranged in the hand-held signal processing handle and is responsible for signal acquisition and wireless transmission. And the data analysis and display host receives and processes the signal, generates a trajectory diagram reflecting the dynamic closing mechanical characteristics of the vocal cords on the two sides through motion compensation, time sequence recognition and inclined plane mechanical calculation, and synchronously displays the trajectory diagram and a throat image. The system can realize direct, in-vivo and quantitative measurement of mechanical characteristics in the whole vocal cord closing process, and provides an objective and dynamic mechanical basis for throat muscle function evaluation.

The utility model discloses a kind of for microsurgery can be universal bending laryngeal forceps, including welding bending lever and connecting rod, the inner surface of bending lever is equipped with several interval distribution ring grooves, the front end of bending lever is welded with forceps head, connecting rod rear end is welded with handle head pipe, the inside of handle head pipe is provided with placing cavity, the front end of placing cavity is connected with connecting rod rear end, the rear end of handle head pipe is equipped with flushing hole, the front end of placing cavity is installed with piston column, the front end of piston column and the movable forceps tongue of forceps head are jointly connected with traction steel rope, the both ends between the outer surface of piston column are equipped with evenly distributed through slot, the front end of handle head pipe outside is provided with handle assembly. The utility model in the process of application operating personnel can be according to experience to bending lever corresponding radian, angle universal bending, to reduce the difficulty that operating personnel will laryngeal forceps smoothly stretch into to patient's throat, easy to operate, it is convenient to use.

This invention discloses an artificial laryngeal sensor based on magnetic repulsion coupling of a dual-layer heterogeneous magnetic thin film and its fabrication method. The sensor includes upper and lower sensing units, each having a first flexible magnetic layer that has been directionally magnetized and a flexible hard magnetic thin film layer that has been patterned and magnetized to form a microscopic magnetic domain array. The two layers, with their like poles facing each other, generate a uniform magnetic repulsion force, forming a dynamically adjustable gap between the triboelectric layers. This gap can passively and adaptively change with the intensity of laryngeal vibration: during strong vibration, the repulsion force surges to prevent contact saturation, while during weak vibration, a small local gap is maintained to preserve high sensitivity. This invention solves the problems of uneven magnetic force and discomfort in traditional magnetic repulsion schemes through all-thin film fabrication and patterned magnetization technology, achieving a balance between high signal fidelity, wide dynamic range, and ultimate wearing comfort, making it particularly suitable for wearable artificial laryngeal speech acquisition systems.

The utility model discloses a laryngeal mask airway which comprises a ventilation catheter, the far end of the ventilation catheter is provided with a mask bag, the mask bag is used for forming tight connection conforming to an anatomical structure at the laryngeal entrance of a patient and covering the laryngeal entrance of the patient to form sealing, and sponge-shaped materials are filled in the mask bag. The surface of the mask bag has a fixed shape and is deformable, and the mask bag can be jointed on the anatomical structure of the laryngeal entrance part of a patient. The sponge-shaped material is filled in the mask bag, so that when the mask bag is inserted into the throat position of a patient, the insertion contact pressure with the throat surface of the patient is small, insertion damage to the throat of the patient is avoided, and the mask bag can automatically recover to the original shape after being inserted, can be jointed on an anatomical structure of the throat inlet part of the patient and is in sealing contact with the peripheral side of the throat of the human body; and the sealing performance is better.

1. Name of the product in this design: Disposable laryngeal lens (full cover type). 2. Purpose of this design: To be used in conjunction with a video laryngoscope for laryngeal examination. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design.

The utility model relates to the field of pressure sensing, and discloses a flexible pressure sensor for breath detection. The sensor comprises a first protective layer, a first electrode layer, a conical pressure-sensitive array, a flexible substrate, a second electrode layer and a second protective layer. The conical pressure-sensitive array consists of conical microstructures and is positioned between the first electrode layer and the flexible substrate; the second electrode layer is located on the lower side of the flexible substrate; the first and second protection layers are respectively arranged on the upper and lower sides of the first and second electrode layers. When the sensor is subjected to laryngeal respiratory pressure, the conical pressure-sensitive array deforms, the contact area between the conical pressure-sensitive array and the electrodes is rapidly increased, the resistance is rapidly reduced, the pressure is converted into a resistance signal, and stable detection of respiratory signals is achieved by measuring the resistance value of the sensor through the piezoresistive effect. The system has the characteristics of high response speed, high sensitivity and strong stability, and provides a wide application prospect for wearable equipment and health detection.

The microstructure artificial laryngeal device provided by the application comprises a micro-porous structure audio sensor, a lower computer and an upper computer, wherein the micro-porous structure audio sensor is used for detecting a vibration signal of a throat and converting the vibration signal into a resistance signal; the lower computer is used for filtering and processing the resistance signal to remove noise interference; and the upper computer is used for accurately identifying audio information in the processed resistance signal. The micro-porous structure audio sensor is attached at a skin surface of a thyroid cartilage, the lower computer is worn at a neck, and the upper computer is worn at a small arm. The microstructure artificial laryngeal device provided by the application can be directly attached to a throat of a patient without being installed in the patient's body, thereby avoiding discomfort of the patient, in addition, the vibration signal of the throat can be better sensed through the micro-porous structure audio sensor, thereby completing sound detection, and in addition, the lower computer for removing noise interference is arranged, and the accuracy of speech recognition can be improved.

The application discloses a laryngeal external fixing device for laryngeal microsurgery, which comprises a fixing disc and at least one bandage arranged at two ends of the fixing disc; the fixing disc is arc-shaped and is provided with four screws; the head end of the screw is located at one side of the fixing disc; the tail end of the screw is connected with a pressing sheet and is located at the other side of the fixing disc; the outer edge surface of the pressing sheet is wrapped with a flexible pad; the opposite positions of the four screws are respectively corresponding to the incisure, the left lamina and the right lamina of the thyroid cartilage and the annular cartilage; the laryngeal external fixing device can press the thyroid cartilage and the annular cartilage and saves manpower.

The invention provides a dysphagia risk early warning method and system based on multi-signal analysis. The method comprises the following steps: acquiring a surface electromyogram signal, a biological impedance signal, a throat vibration signal and a neck microenvironment temperature and humidity signal of the neck of a wearer through a flexible wearable sensing unit; a breathing phase determined by the neck microenvironment temperature and humidity signals is used as a time reference, time alignment and preprocessing are conducted on the multi-modal physiological signals, and multi-channel time sequence data are obtained; performing feature extraction and fusion on the multi-channel time sequence data to generate a discriminative fusion feature vector; inputting the vectors into a pre-training classification model for real-time reasoning, and identifying swallowing function states including effective swallowing, ineffective swallowing and suspicious aspiration; and generating a grading risk early warning signal in response to the identified abnormal state. Through multi-mode signal fusion and respiratory rhythm calibration, the problems of motion artifact interference and time sequence alignment are solved, and accurate and continuous monitoring of the dysphagia risk is achieved.