4 results about "Sympathetic nerve activity" patented technology

This invention provides a multi-dimensional monitoring and assessment method for sleep disorders at high altitudes, comprising: S1, concurrently collecting respiratory signals, blood oxygen saturation and pulse wave (PPG), heart rate / ECG, body movement and position, and environmental parameters such as altitude / air pressure and temperature and humidity during nighttime sleep; S3, performing sleep / wake discrimination and detecting apnea, hypoventilation, and blood oxygen desaturation events based on structured data, and statistically analyzing event metrics; S4, calculating the frequency domain characteristics of heart rate variability (HRV) from RR interval sequences to obtain a sympathetic nerve activity proxy index; S5, weightedly fusing the event metrics, oxygenation metrics, and sympathetic proxy into a comprehensive score R and performing hierarchical interpretation; S6, fitting an individualized risk trajectory model to the cross-night scoring sequence and outputting short-term predictions. This method enables the construction of individualized adaptation trajectories and short-term prediction models in a real-world high-altitude environment, shifting from "static results" to "process evaluation."

The invention relates to the technical field of biomedical engineering, and discloses a renal sympathetic nerve nuclide evaluation system and method for RDN, and the system comprises a nuclide image collection module, a data analysis module, a nuclide kinetic parameter analysis module, a neural activity quantification module and a dynamic evaluation and decision module, and is used for collecting a nuclide image data set; identifying a kidney area in the nuclide image data set, and analyzing the radioactivity counting rate of the kidney area; analyzing an uptake index and a retention index of the radionuclide marker based on the radioactivity counting rate; analyzing a sympathetic nerve activity quantitative index of the kidney region according to the uptake index, the retention index and the electrocardio physiological data; and determining a dynamic threshold value of the sympathetic nerve activity quantitative index based on the activity expression level index of the target object, and performing dynamic analysis on the sympathetic nerve activity quantitative index according to the dynamic threshold value to obtain an evaluation index. According to the invention, the accuracy of kidney sympathetic nerve nuclide evaluation can be improved.

The application relates to the technical field of signal analysis, in particular to an acute pain evaluation method and system based on EDA signals, which comprises the following steps: collecting electrodermal activity (EDA) signals of a subject; calculating an individual time-varying sympathetic nerve activity (TVSymp) curve; constructing a priori knowledge base containing a standardized pain response sympathetic nerve (SPainSymp) template; inputting the EDA signals and the individual TVSymp curve into a PCVAE model, fusing features and decoupling into pain common features and individual specific features; performing pain intensity classification, and reconstructing a standardized SPainSymp curve by removing individual specific features; and outputting the pain intensity classification result and the dynamic change trend of the standardized SPainSymp curve in real time. The method can effectively decouple and separate the physiological response induced by pain from the individual baseline variation from the mixed EDA signals, and is not interfered by individual differences, and has the characteristics of high accuracy and strong real-time performance.

The invention discloses a system for common hepatic artery nerve mapping and liver function regulation, and relates to the technical field of nerve mapping and regulation systems. Comprises: an interventional catheter unit configured to be delivered to a target segment of an abdominal trunk or a common hepatic artery via a blood vessel; the electrical stimulation and mapping unit is electrically connected with the interventional catheter unit and is configured to apply a controllable electrical stimulation signal to the target section and collect an impedance signal of a stimulation part so as to evaluate a catheter attaching state; and the physiological signal monitoring unit is configured to monitor at least one physiological parameter related to the sympathetic nerve activity or the liver metabolism function in real time in the electrical stimulation process. According to the invention, a neurological function mapping mechanism guided by electrical stimulation is introduced; electrical stimulation is applied to different artery segments, and changes of key physiological indexes such as blood pressure and blood sugar are monitored in real time, so that the system can accurately recognize neural enrichment with the strongest response to stimulation; the defect that blind elimination is carried out only depending on anatomical experience in the prior art is overcome.