35 results about "High blood flow" patented technology

The invention is a next generation miniature heart assist device developed in order to maintain the blood circulation in patients with severe heart failure, and is applied endovascularly to the large arteries. This device is technically a kind of synchronous servo electric motor using “direct drive technology”. It provides longer battery life and high blood flow. Small volume and very low energy consumption provide a much longer battery life and a high blood flow. As the outer surface of the parts placed into the blood vessel will be completely covered with the endothelial cells and the intima layer of the arteries in time, there will be no foreign surface contacting directly with blood. As a result, no thromboembolic event or any negative effect on the cellular components of blood is expected.

A chitosan biomaterial is frozen in aqueous solution to form a frozen chitosan structure from which water is removed by a prescribed freeze-drying process to form a sponge-like chitosan structure having a thickness and a density. The sponge-like chitosan structure is compressed by application of heat and pressure to reduce the thickness and increase the density of the sponge-like chitosan structure to form a densified chitosan structure. The densified chitosan structure is further preconditioned by heating the densified chitopsan structure according to prescribed conditions to form a wound dressing. The wound dressing possesses an adhesion strength and resistance to dissolution in high blood flow bleeding situations.

The invention can selectively heat a diseased area or undesired tissue in the body while minimizing heating to the healthy area and surrounding tissue. This is done by exposing the undesired tissue to a scanning focused microwave beam arriving from different directions, all directions passing through the undesired tissue. The invention is particularly useful for heating tissues in which the undesired tissue has reduced blood flow. The undesired area will heat up rapidly while the healthy tissue will be cooled by the blood flow. This is particularly effective for treating emphysema because of the low mass of the lungs and the high blood flow.

The present invention relates to a Heart Assist Device which comprises a motor, a control unit and an internal battery connected to the motor. The control unit is connected to the motor controlling the motor's operation. The motor of the Heart Assist Device further comprises a rotor without an axial pin running in magnetic bearing. The present disclosure has smaller size and consumes less energy to longer battery lives. The device has high power so that it generates high blood flow. The contact surface is small enough so that it does not cause any harmful effects for blood cells and coagulation systems.

The invention relates to a method for determining the recirculation in a fistula and / or the cardiopulmonary recirculation part during an extracorporeal blood treatment, according to which the blood to be treated flows in an extracorporeal blood circuit (I) through a blood chamber (8) of a dialyser (6) split by a semi-permeable membrane (7) into the blood chamber and a dialysis liquid chamber (9), and dialysis liquid flows in a dialysis liquid path (II) through the dialysis liquid chamber of the dialyser. The invention also relates to a device for determining the recirculation in a fistula and / or the cardiopulmonary recirculation part, and to a blood treatment device comprising a device for determining the fistula recirculation and / or the cardiopulmonary recirculation part. The method and device according to the invention are based on the fact that the sum of the fistula recirculation (RA) and the cardiopulmonary recirculation part (RCP), i.e. the total recirculation (R), is determined for two blood flow rates which differ from each other. The fistula recirculation and / or the cardiopulmonary recirculation part are then determined from the recirculation for the two blood flow rates. The first recirculation measurement is carried out for a high blood flow (QBH) for which a fistula recirculation can occur, while the second measurement is carried out for a low blood flow (QBL) for which a fistula recirculation does not occur. These two measuring values form the basis of the determination of the fistula recirculation and / or the cardiopulmonary recirculation part.

An ultrasonic diagnosis apparatus includes a frame data generation device configured to generate a frame data of a blood flow image based on echo signals obtained by transmissions and receptions of ultrasonic waves on a same acoustic ray, a processed frame data generation device configured to generate a processed frame data using current data excluding an error data having a higher brightness, a faster blood speed, or a higher blood flow power than a brightness, a blood speed, or a blood flow power of standard data within pixel data corresponding to each other in a plurality of frame data at different time phases, and an image display control device configured to display a blood flow image based on the processed framed data.

The invention is a new generation permanent heart assist device developed to be installed into great arteries such as trans-aortic and trans-pulmonary artery to maintain blood circulation of the patients with end-stage heart failure. This device is a sort of brushless, synchronous, servo, electric motor which uses direct driver technology. It consumes little energy and provides high blood flow. The specially designed hollow rotor without a pivot pin provides enough blood flow to the patient by pushing the blood forward with the helical winglets inside it. The risk of thromboembolic events on the foreign surface that contacts with blood is less than in the counterparts of this device. Finally, the invention; is a curved permanent heart assist device that is applied on the aortas, reinforced twice with double stators and designed in smaller size so as not to compress surrounding tissues and organs.

The invention discloses a three-dimensional blood flow imaging method and system based on optical coherence tomography of feature space. The OCT scattering signal of the scattering signal sample in the three-dimensional space is collected by the collector; the two-dimensional feature space is constructed through the theoretically established classifier combined with the local signal-to-noise ratio and decorrelation coefficient of the OCT scattering signal, and the classification of the dynamic blood flow signal and the static tissue is realized. , which specifically includes: using the first-order and zero-order autocovariance to calculate and analyze the OCT scattering signal, and obtain the two characteristics of the signal-to-noise ratio and decorrelation of each OCT scattering signal; constructing a two-dimensional feature space of the reciprocal of the signal-to-noise ratio-decorrelation coefficient ; Based on multivariate time series theory, construct a linear classifier for ID space and remove static surrounding tissue background. The invention can significantly suppress the influence of system noise on blood flow imaging, improve the contrast of blood flow images, especially the visibility of blood vessels in deep tissues, and improve the accuracy of blood flow quantification.

The invention relates to a dialysis machine capable of adjusting blood flow, and belongs to the technical field of medical instruments. The blood flow regulating device includes an introduction pipeline, a pumping pipeline, and a temporary blood storage cavity arranged between the introduction pipeline and the pumping pipeline; a flow sensor is arranged on the introduction pipeline, and the pump A blood pump that can be turned on intermittently is arranged on the outlet pipeline. The present invention adds a liquid temporary storage space to perform "slow storage first, then high-speed release", so that the blood flow in the dialysis process can reach a higher level. Under the premise of ensuring that the blood does not coagulate and the safety of the patient, the blood flow rate is slow when the blood flows through the patient, and the relatively rapid "flow rate change" during the dialysis process is achieved, so as to take into account the patient's health and high-quality dialysis effect, and the patient does not need to create an internal fistula. It can also meet the high blood flow required by high-efficiency dialysis, reduce the pain of the patient, and facilitate the life of the patient. At the same time, problems such as blood vessel collapse, hypotension, and congestive heart failure caused by dialysis are effectively avoided.