CN-122004728-A - Dynamic vocal cord closing process mechanical track evaluation system

CN122004728ACN 122004728 ACN122004728 ACN 122004728ACN-122004728-A

Abstract

The invention relates to a mechanical track evaluation system for a vocal cord dynamic closing process, which belongs to the technical field of medical appliances and comprises a disposable probe assembly, a handheld signal processing handle and a data analysis and display host. The distal end of the disposable probe assembly is provided with a wedge-shaped double-inclined-plane sensing head, and the proximal end is provided with a multi-dimensional sensing module and a waterproof electrical interface for acquiring mechanical and motion signals in the closing process of the vocal cords. The handheld signal processing handle is connected with the probe assembly, and a signal processing circuit is arranged in the handheld signal processing handle and is responsible for signal acquisition and wireless transmission. The data analysis and display host receives and processes the signals, generates a track diagram reflecting dynamic closing mechanical characteristics of the double-sided vocal cords through motion compensation, time sequence identification and inclined plane mechanical calculation, and synchronously displays the track diagram and the laryngeal image. The system can realize direct, in-vivo and quantitative measurement of mechanical properties of the whole vocal cord closing process, and provides objective and dynamic mechanical basis for laryngeal muscle function evaluation.

Inventors

QIN YONGLIAN
WANG CUI
CHANG LANLAN
LIU LU
LIU BINYAN

Assignees

中国人民解放军陆军军医大学第一附属医院

Dates

Publication Date: 20260512
Application Date: 20260326

Claims (8)

1. The mechanical track evaluation system for the vocal cord dynamic closing process is characterized by comprising a disposable probe assembly, a handheld signal processing handle and a data analysis and display host, wherein a wedge-shaped double-inclined-plane sensing head is fixedly arranged at the far end of the disposable probe assembly, a waterproof electrical interface is fixedly arranged at the near end of the disposable probe assembly, a connecting interface is fixedly arranged at the front end of the handheld signal processing handle, the waterproof electrical interface of the disposable probe assembly is detachably connected with the connecting interface of the handheld signal processing handle, the handheld signal processing handle is in communication connection with the data analysis and display host, the wedge-shaped double-inclined-plane sensing head comprises a left sensing inclined plane and a right sensing inclined plane, the left sensing inclined plane and the right sensing inclined plane intersect to form a vertex angle, a multi-dimensional sensing module is fixedly arranged in the disposable probe assembly and is electrically connected with the waterproof electrical interface, and a signal processing circuit is fixedly arranged in the handheld signal processing handle and is electrically connected with the connecting interface.
2. The vocal cord dynamic closing process mechanical track evaluation system of claim 1, wherein the multidimensional sensing module comprises a force sensing unit and a motion sensing unit, wherein the force sensing unit is a two-dimensional force sensor, and the motion sensing unit is an inertial measurement unit.
3. The vocal cord dynamic closing process mechanical track evaluation system according to claim 2 is characterized in that the signal processing circuit comprises a microcontroller, an analog front end and a wireless transmission module, wherein the input end of the analog front end is connected with the waterproof electrical interface through the connection interface, the output end of the analog front end is connected with the microcontroller, the wireless transmission module is connected with the microcontroller, and the wireless transmission module is in communication connection with the data analysis and display host.
4. The system for evaluating mechanical trajectories of vocal cord dynamic closure processes of claim 3, further comprising an imaging device, wherein the data analysis and display host is communicatively coupled to the imaging device for receiving laryngeal images acquired by the imaging device.
5. The system of claim 4, wherein the imaging device is a self-contained laryngoscope.
6. The system for evaluating mechanical trajectories of vocal cord dynamic closure processes of claim 5, wherein the data analysis and display host comprises a motion compensation module, a time sequence recognition module, a mechanical calculation module and a trajectory generation module; The motion compensation module is used for calculating the self motion of the disposable probe assembly based on the data of the motion sensing unit and compensating the mechanical signal detected by the force sensing unit; the time sequence identification module is used for identifying a first starting moment of contact between a left vocal cord and the left induction inclined plane and a second starting moment of contact between a right vocal cord and the right induction inclined plane based on the compensated mechanical signal; the mechanical calculation module is used for calculating left normal force and left tangential force acting on the left induction inclined plane and right normal force and right tangential force acting on the right induction inclined plane based on the compensated force signals according to an inclined plane mechanical model; the trajectory generation module generates and displays a vocal cord dynamic closed mechanical trajectory graph comprising the Zuo Faxiang force, the right normal force, the left tangential force, and the right tangential force over time.
7. The system of claim 6 wherein the data analysis and display host is further configured to display the vocal cord dynamic closing mechanical trajectory graph and the laryngeal image in a synchronized superimposed manner.
8. The dynamic closed process mechanical trajectory evaluation system for vocal cords of claim 1, wherein the surfaces of the left sensing inclined plane and the right sensing inclined plane are provided with micro-texture structures.

Description

Dynamic vocal cord closing process mechanical track evaluation system Technical Field The invention belongs to the technical field of medical appliances, and relates to a mechanical track evaluation system for a dynamic vocal cord closing process. Background In the field of laryngeal and voice medicine, accurate assessment of laryngeal muscle function is a core basis for diagnosing diseases such as vocal cord paralysis, laryngeal dystonia, vocal cord groove and the like, making an operation scheme and evaluating a rehabilitation effect. The functional state of the laryngeal internal muscle group, which is a direct executor for controlling vocal cord movement and adjusting glottic closure and tension, directly determines the quality of sound production, respiration and airway protection. Currently, clinical assessment relies mainly on three types of technical means, laryngoscopy (including stroboscopic laryngoscopes), laryngeal electromyography and aerodynamic testing, which provide diagnostic information from different sides, but all have inherent, insurmountable limitations. Laryngoscopy, the most intuitive morphological observation method, allows doctors to observe the color, form, movement and closure phase of vocal cords in real time, and is the basis of voice evaluation. However, the nature is a subjective visual assessment that fails to translate the mechanical differences in vocal cord closure tightness, contact pressure, and bilateral vocal cord movement into objective, quantifiable data. The doctor can only rely on experience to judge whether the vocal cords are in 'slight contact' or 'strong adduction', and for unilateral vocal cord paralysis, the abnormal positions and closed cracks of the vocal cords can only be observed, but the compensatory excessive adduction force of the vocal cords on the healthy side and the residual tension of the vocal cords on the affected side cannot be accurately quantified, so that the force selection of the surgical intervention (such as vocal cord injection or laryngeal frame surgery) lacks accurate objective basis. Laryngeal electromyography records the electrical activity of muscles through the needle electrode, aimed at assessing the integrity of the innervation. Although it can distinguish between neurogenic and myogenic lesions, it is an invasive procedure, poorly tolerated by patients, and the measurement is of bioelectric signals, rather than of mechanical forces resulting from muscle contractions. Nerve electrical excitation is not equivalent to muscle energy to produce effective mechanical output, and particularly when muscle is atrophic or fibrotic, the electrical signal and mechanical function are seriously disjointed, so that electromyography is difficult to accurately reflect the actual movement capacity and closure strength of vocal cords. Aerodynamic testing indirectly extrapolates the efficiency of glottal closure by measuring parameters such as average airflow rate, maximum sounding time, glottal depression, etc. at sounding. These indicators reflect the overall performance of the sound production system, but cannot resolve which side of the vocal cord dysfunction resulted from the result, nor can it distinguish between glottic morphology problems (e.g., fissures) and vocal cord body tension problems. For example, the same airflow rate may result from bilateral paresis, or from unilateral paralysis with contralateral brute force compensation, whose clinical decision paths are distinct, whereas aerodynamic data does not provide such critical discrimination information. In summary, the prior art systems constitute a "functional assessment blind zone" in that they either provide a morphological "visual snapshot" or provide an electrophysiological "neural report" or provide a systematic "performance integration", but none are capable of capturing and tracing the mechanical evolution trajectory and bilateral collaborative details of the dynamic movement of the vocal cords from open to closed directly, in vivo, quantitatively. This results in the clinician being unable to perform real-time "chassis dynamometer" in the face of functional disorders such as vocal cord paralysis, as if the balance of the output power of his engine and the two-wheel drive were inferred by merely looking at the look and circuit diagram of the car. The lack of dynamic process mechanical information severely restricts the fine diagnosis of laryngeal function diseases, the accurate design of personalized operation schemes and the objective quantitative evaluation of postoperative rehabilitation efficacy, and is a key technical bottleneck to be broken through in the current clinical practice of laryngeal and voice medicine. Disclosure of Invention In view of the above, the present invention is directed to a mechanical track evaluation system for a dynamic closing process of vocal cords, which solves the problems that in the prior art, a laryngoscope can only provide morphological