A Physiologically Rotated Posterior Guide Leaf Artificial Heart

Abstract

The invention relates to an artificial heart with a physiological gyration back guide vane, belonging to the field of biomedical engineering. The device is composed of a blood pump sleeve, a front guide vane, an impeller and a physiological gyration back guide vane, wherein the front guide vane is fixed at the front end of the blood pump sleeve, and the physiological gyration back guide vane is arranged at the back part of the blood pump sleeve; the impeller is arranged between the front guide vane and the physiological gyration back guide vane; the impeller is connected with the physiological gyration back guide vane through a rotating shaft; and the impeller and the physiological gyration back guide vane are connected with the front guide vane and a rear cantilever bracket by adopting a hemisphere supporting structure. The geometric structure of the physiological gyration back guide vane comprises three parts, wherein the vane of the front section is consistent with the vane of the impeller in trend, the vane of the middle section is parallel to the axis of aorta vessels, and the vane of the rear end is consistent with the aorta in physiological curvature. According to the artificial heart, the physiological gyration back guide vane is used for replacing the traditional back guide vane, so that a blood flow field of a bloodpump outlet is optimized, a gyration blood flow approximating to the normal physiology is generated, the vascular pathological change after implantation is reduced, and the physiological effects of patients after healing are increased.

Description

technical field [0001] The invention relates to an artificial heart with guide vanes after physiological rotation, belonging to the field of biomedical engineering. Background technique [0002] The artificial heart has gradually become one of the effective methods for the treatment of heart failure, and the aortic lesion caused by it is a key complication that limits the clinical application of the artificial heart. For this reason, the patent 2014102513825 designed a suspended rear guide vane to increase the scouring effect on the aorta. Similarly, the patent 201410379867.2 designed a rear guide vane with a cantilever structure, and the upper blade adopts a structure with a helical angle opposite to that of the impeller blade, which reduces the flow dead zone at the rear guide vane, thereby reducing the impact of blood flow on the aortic vessel . Similarly, the helix angle of the rear guide vane blade of the artificial heart designed in patent 201410537298X is opposite t...

AI Technical Summary

Problems solved by technology

Studies have found that the swirling flow characteristics in the aorta are the key hemodynamic factors to maintain the normal structure and function of the aorta, while the traditional artificial heart has not considered the physiological aspect of maintaining the normal blood swirling flow characteristics in the aorta. The direction of the vane of the guide vane is inconsistent with the flow direction of healthy aortic swirling flow, so that the output blood flow field of the artificial heart contains obvious non-physiological swirling components, and this blood flow will directly affect the structure of the aortic vessel and function, leading to pathological changes in blood vessels

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