69 results about "Transcranial Doppler" patented technology

A device, method, and system for detecting emboli in the brain is disclosed. A transcranial Doppler photoacoustic device transmits a first energy to a region of interest at an internal site of a subject to produce an image and blood flow velocities of a region of interest by outputting an optical excitation energy to said region of interest and heating said region, causing a transient thermoelastic expansion and produce a wideband ultrasonic emission. Detectors receive the wideband ultrasonic emission and then generate an image of said region of interest from said wideband ultrasonic emission. A Doppler ultrasound signal will also be deployed to image the region of interest. Doppler presents changes in velocity to map blood flow. Additionally, a dye can be given to visualize the brain vasculature and a perfusion measurement can be made in various regions of the brain along with the transcranial Doppler and the photoacoustic screening. Systems are taught using resultory medical data for better triage within an enhanced stroke ecosystem.

A real-time decision-support system predicts hemorrhagic shock of a patient by analysis of electrocardiogram (ECG) signals and transcranial Doppler (TCD) signals from the patient. These signals are subject to signal decomposition using Discrete Wavelet Transform (DWT) to sets of wavelet coefficients and selecting significant signal features. Machine learning is applied to the significant features to evaluate and classify hypovolemia severity based on the input ECG and TCD signals from the patient. The classification of blood loss severity is displayed in real-time. An extension of the decision-support system integrates Arterial Blood Pressure (ABP) signals and thoracic electrical bio-impedance (DZT) signals with the ECG and TCD signals from the patient to evaluate severity of hypovolemia.

The systems and methods described herein include a non-invasive diagnostic tool for intracranial hypertension (IH) detection and other neurological conditions like mild and moderate TBI that utilizes the transcranial Doppler (TCD) measurement of cerebral blood flow velocity (CBFV) in one or more cerebral vessels. A headset includes a TCD scanner which automatically locates various cerebral arteries and exerts an appropriate pressure on the head to acquire good CBFV signals.

The invention provides a transcranial Doppler plane annular phased array probe, which comprises a piezoelectric vibrator, a metal shielding casing, an electronic tuning circuit, a coaxial cable, a case, a back lining, a matching layer and an acoustic lens, wherein the piezoelectric vibrator comprises more than one array element ring in annular distribution to form concentric circles, each array element ring adopts independent lead wire control, the areas of all array elements are identical, in addition, the path differences of all array elements are identical, each independent array element is excited by adopting specific time delay, and the dynamic focusing in the spreading direction of ultrasonic beams can be achieved. The plane annular phased array is utilized, each array element is respectively subjected to time delay during the emitting or receiving, and the emitting focusing or the receiving focusing is realized, so focal points can be continuously adjusted, the ultrasonic beams can be effectively and controllably narrowed, the depth of field is long, the transcranial Doppler plane annular phased array probe has the advantages of variable aperture, variable focal point, variable trace and the like, the lateral resolution ratio of a system can be comprehensively improved, and the signal to noise ratio is effectively improved.

The invention provides a transcranial Doppler intracranial blood flow three dimensional information display method and system; the method comprises the following steps: a, using a transcranial Doppler ultrasonic probe to do multi-beam supersonic wave scanning for an intracranial predetermined area, and receiving an ultrasonic echo signal; b, calculating the ultrasonic echo signal to obtain blood flow information like intracranial blood vessel depth, blood flow direction, relative blood flow volume and blood flow speed; c, scanning the predetermined area so as to obtain blood flow information in various directions, and using three dimensional modeling calculation to form a stereo model containing blood flow information; d, doing visualization processing for the data of the stereo model so as to form a three dimensional image, and customizing and adjusting the three dimensional image according to a user order, outputting the image, and displaying the image for user. Compared with MRI, CT, DSA, the method and system are low in cost, convenient, can repeatedly detect, and can greatly reduce dependence level for experiences of an operator, thus providing more complete and objective blood flow information.

A cerebrovascular regulation function monitor system and a method for detection of cerebrovascular circulation critical closing pressure, wherein the cerebrovascular regulation function monitor system includes a signal collection system for in-phase sampling analog signal of transcranial doppler (TCD) signal and continuous artery pressure signal and further converting the analog signals into correspondent digital signals and a signal processing / displaying system connected with the signal collection system via interfaces for processing the digital signals to obtain the cerebrovascular critical closing signal and displaying them. The method and system realize a non-invasion detection and monitor of cerebrovascular autoregulation function in clinical practice.

A cerebrovascular regulation function monitor system and a method for detection of cerebrovascular circulation critical closing pressure, wherein the cerebrovascular regulation function monitor system includes a signal collection system for in-phase sampling analog signal of transcranial doppler (TCD) signal and continuous artery pressure signal and further converting the analog signals into correspondent digital signals and a signal processing / displaying system connected with the signal collection system via interfaces for processing the digital signals to obtain the cerebrovascular critical closing signal and displaying them. The method and system realize a non-invasion detection and monitor of cerebrovascular autoregulation function in clinical practice.

The present invention provides a method for determining the cerebral hemodynamic model for depression, using carotid duplex ultrasound to establish percent stenosis of a right external carotid artery and a left external carotid artery, and transcranial Doppler ultrasound instrument to measure mean flow velocity within the cerebral arteries including the right and left internal carotid arteries, right and left middle cerebral arteries, right and left anterior cerebral arteries, right and left posterior cerebral arteries, and basilar artery. Percent carotid stenosis and mean flow velocity values in cerebral arteries are used to determine the cerebral hemodynamic model associated with depression in men and women, respectively.

The invention discloses a physical examination system based on cloud computing. The physical examination system comprises a cloud microelement analyzer, a cloud weighing machine, a cloud electrocardioscanner, a cloud pulse monitor, a cloud blood pressure monitor, a cloud blood fat monitor, a cloud blood glucose monitor, a cloud vision monitor, a cloud body temperature monitor, a cloud whole-body thermal imaging monitor, a cloud transcranial Doppler monitor, a cloud bone mineral density and bone age monitor, a cloud carbon 14 breath test part, a cloud human body bio-electricity signal monitor and a cloud stethoscope. The physical examination system comprises a cloud platform, a server platform, a database, a network access device and physical examination instruments. The functions and the number of the physical examination instruments are not limited. The problems that physical examination is difficult and microelements for growth of teenagers are not balanced are solved. Serious diseases without subjective symptoms, for example, the stomach cancer, the colon cancer, the lung cancer, the breast cancer and the uterine cancer, can be found at the germination stage.

The invention discloses a device for detection a cerebral blood flow regulation function, which belongs to the technical field of biomedical engineering. The device comprises a piezoelectric ceramic plate (1), a fixed elastic ribbon (2) of the piezoelectric ceramic plate (1), a trans-cranial Doppler probe module (3), a detection box (5), a light-emitting diode (6) and a phase difference result display LED (7), wherein the piezoelectric ceramic plate (1) is used for measuring pulse waves; the trans-cranial Doppler probe module (3) is used for measuring medium-sized artery blood flow velocity waves; the light-emitting diode (6) is arranged on the detection box (5) and is used for indicating effective characteristic waves; and the piezoelectric ceramic plate (1) and the trans-cranial Doppler probe module (3) synchronously measure signals and are connected with a respiratory frequency band characteristic wave extraction and phase difference detection circuit arranged in the detection box (5) through a connecting wire (4) respectively. The device needs no external artery blood pressure control, has high use safety, uses the piezoelectric ceramic plate to measure pulse pulsation signal waveforms from a wrist directly, and evaluates the cerebral blood flow regulation function according to phase changes of respiration characteristic waves of pulse and the cerebral blood flow, and has the advantages of use safety, simple and convenient operation, quick measuring and processing speed and high performance price ratio.

Telemedicine systems and methods are described. In a telemedicine system operable to communicate with a remote operations center, communications can be transmitted / received using a transceiver having an antenna. The antenna can include first and second di-pole antenna elements, the first di-pole antenna element being vertically polarized and the second di-pole antenna element being horizontally polarized. A controller of the system can establish, using the transceiver, a telemedicine session with the operations center using a Transport Morphing Protocol (TMP), the TMP being an acknowledgement-based user datagram protocol. The controller can also mask one or more transient network degradations to increase resiliency of the telemedicine session. The telemedicine system can include a 2D and 3D carotid Doppler and transcranial Doppler and / or other diagnostic devices, and provides for real-time connectivity and communication between medical personnel in an emergency vehicle and a receiving hospital for immediate diagnosis and treatment to a patient in need.