4 results about "Arterial stenosis" patented technology

This specification provides a cardiac ultrasound coronary artery stenosis diagnostic system and method based on a visual language transfer model. The system includes: a database construction module for standardizing multi-view cardiac ultrasound video sequences and radiological reports; a cardiac region of interest (ROI) standardization and labeling module for segmenting myocardial segments, obtaining ROI data, and generating a coronary artery-specific perfusion region mask as the ROI for vascular-level stenosis prediction; a visual language transfer pre-training module for semantic alignment of video data and report text using a visual language transfer model; and a downstream task prediction module for utilizing the enhanced attention mechanism of the coronary artery-specific perfusion region mask, based on the global visual features output by the visual language transfer pre-training module, to output patient-level classification results for obstructive coronary artery disease and vascular-level stenosis prediction results for LAD, LCX, and RCA.

This invention discloses a pulse-release balloon dilation pump and method for intracranial arterial stenosis. Addressing the mechanical mechanism of thin intracranial arterial walls and irregular plaques leading to axial stress accumulation and subsequent complications such as dissection and detachment, this invention adds a pulse-release control unit to a conventional pressure pump. Its core physical principle is as follows: When the balloon dilates at an irregular plaque, the intramural strain energy density distribution is uneven. Static friction constraint keeps the system in a high-energy metastable state, and the accumulated elastic potential energy ΔU continuously increases with expansion. The constraint factor λ is defined as F_required / f_max; when λ>1, the balance is unstable, and energy suddenly bursts. This invention uses periodic short-term pressure release to instantaneously decrease the contact pressure, reduce the static friction limit, and briefly raise λ to >1, actively triggering micro-slippage, releasing a small portion of the accumulated energy each time, achieving segmented and gentle energy release. Pulse parameters (amplitude, frequency, etc.) can be flexibly adjusted according to actual clinical conditions. The pulse mode offers flexible and diverse usage options. Operators can initiate it synchronously in the early stages of dilation, when risk signs appear, intervene as needed during pressure application, or combine multiple methods, allowing the operator to independently determine the operational procedure. Based on thin-film mechanics, tribology, and viscoelasticity theories, this invention is simple to operate, does not alter the clinical procedure, and effectively reduces the risk of complications during intracranial artery stenosis balloon angioplasty.

A personal carotid artery stenosis detection and stroke prevention device and a personal carotid artery stenosis detection and stroke prevention process are disclosed. The personal carotid artery stenosis detection and stroke prevention device is configured to check carotid arteries of a person for buildup of stenosis. The device is a smart device with a camera and a processing unit configured to analyze video footage captured by the camera and detect possible buildup of stenosis in one carotid artery or both carotid arteries. Analysis and detection is carried out according to the personal carotid artery stenosis detection and stroke prevention process. By detecting stenosis buildup, the device is able to inform the person of the risk of stroke, thereby helping the person to prevent a potential stroke.

A method measures a perfusion wave upstroke associated with leg perfusion dynamics, the perfusion wave upstroke including two phases, an initial slow phase and a fast-rising phase, and using prolongation of the slow phase to detect a presence of arterial stenosis and to assess stenosis severity.