4 results about "Blood stream" patented technology

Valve prostheses are disclosed that are adapted for secure and aligned placement relative to a heart annulus. The valve prostheses may be placed in a non-invasive manner, e.g., via trans-catheter techniques. The valve prosthesis may include a resilient ring, a plurality of leaflet membranes mounted with respect to the resilient ring, and a plurality of positioning elements movably mounted with respect to the flexible ring. Each of the positioning elements defines respective proximal, intermediate, and distal tissue engaging regions cooperatively configured and dimensioned to simultaneously engage separate corresponding areas of the tissue of an anatomical structure, including respective first, second, and third elongate tissue-piercing elements. The proximal, distal, and intermediate tissue-engaging regions are cooperatively configured and dimensioned to simultaneously engage separate corresponding areas of the tissue of an anatomical structure so as to stabilize a position of the valve prosthesis with respect to the anatomical structure, including wherein for purposes of so simultaneously engaging the separate corresponding areas of tissue, at least one of the first, second, and third elongate tissue-piercing elements is pointed at least partially opposite the direction of blood flow, and at least another thereof is pointed at least partially along the direction of blood flow. The valve prosthesis may also include a skirt mounted with respect to the resilient ring for sealing a periphery of the valve prosthesis against a reverse flow of blood around the valve prosthesis.

The invention provides a method and device for measuring blood flow in a blood vessel and a processor. The method comprises the following steps: acquiring multiple frames of continuous original blood vessel images; pre-processing the original blood vessel images through an artificial intelligence algorithm, obtaining a plurality of binary images, and blood vessels in the binary images being continuous; extracting one or more target blood vessels from the binary image; and constructing a 3D blood vessel model of the target blood vessel. The transient flow, the transient flow velocity, the average flow and the average flow velocity of the target blood vessel are measured at least according to the 3D blood vessel model. According to the scheme, the transient flow rate, the transient flow rate, the average flow rate and the average flow rate of the blood vessel are obtained based on the segmented images of the continuous frames.

The invention discloses an acquisition parameter configuration method, a storage medium and ultrasonic equipment. The method comprises the following steps: acquiring a blood flow signal based on a preset acquisition parameter; when a blood flow signal exists in a preset depth, determining a depth threshold corresponding to the blood flow signal based on M waves; and adjusting the preset depth according to the depth threshold so as to adjust the acquisition parameters. By comparing the preset depth with the depth threshold determined according to the M waves, the preset depth is automatically adjusted on the basis of the depth threshold, so that automatic adjustment of the acquisition parameters of the ultrasonic equipment is realized, and convenience is brought to a user.