4 results about "Bicuspid valve" patented technology

Disclosed are a method for calculating blood flow and shear stress of aorta having a bicuspid aortic valve, readable medium storing the method and a medical device using the method. A method for calculating blood flow and shear stress of aorta having a bicuspid aortic valve, which is performed by an electronic device, the method comprises receiving characteristic values of a bicuspid aortic valve, and calculating blood flow per unit area and shear stress applied to the aorta in a bipolar coordinate system of governing equation.

To provide methods and apparatuses for bisection of heart valve leaflets using a catheter having a cutting element.SOLUTION: The invention is a device, system, and method for repairing the heart valve function, which may include bisecting native valve leaflets for improved deployment of a prosthetic heart valve in the native valve annulus. The invention may include a catheter having a cutting element shaft with a cutting element configured to puncture a valve leaflet and / or make a controlled cut through the leaflet. The device may have an extendable foot configured to be positioned on an opposite side of the valve leaflet from the cutting element shaft. The device may include magnets to guide the cutting element and / or cutting element shaft in proper alignment with the extendable foot and to hold the elements in place during leaflet bisection.SELECTED DRAWING: Figure 7

The application discloses a kind of for bicuspid valve clamp surgery navigation multi-modal image automatic registration method, comprising the following steps: acquisition patient preoperative heart CTA image, intraoperative CBCT image and intraoperative TEE image / corresponding perspective image, and the CTA, CBCT and TEE image of this acquisition are pretreated;Complete CTA to CBCT three-dimensional automatic coarse registration, establish unified patient coordinate system, and combine with heart and breathing motion compensation, dynamic fine registration is carried out to coarse registration result;Estimate TEE probe pose and imaging plane, identify the common visual target in TEE and CBCT / perspective, complete TEE and CBCT / perspective dynamic automatic registration;Under unified coordinate system, fuse each modality image, generate the multi-modal navigation interface and navigation information of surgery.The method of the application can realize automatic, fast, accurate multi-modal space registration, improve the standardization degree and safety of bicuspid valve clamp surgery navigation.

The present application relates to the technical field of artificial heart pump, and discloses a testing device for artificial heart pump.The testing device for artificial heart pump comprises a simulated left atrium cavity, a simulated bicuspid valve, a simulated left ventricle cavity, a simulated aortic valve, a simulated aorta cavity and a simulated vein cavity for forming a blood circulation flow system, so that the blood circulation process in the human body can be simply and accurately reproduced, the hemodynamic characteristics of the natural heart of the human body under different degrees of failure and different physiological states can be simulated, the auxiliary blood pumping effect of the artificial heart pump under different degrees of failure of the simulated left ventricle cavity and the simulated left atrium cavity and under different physiological states can be tested, and the hydraulic performance experiment and the extracorporeal blood circulation experiment of the artificial heart pump can be carried out based on the testing device, so that the accuracy of the testing result of the artificial heart pump and the integrity of the testing performance are ensured.