Intractable heart failure left ventricular function auxiliary device

Abstract

The invention discloses an intractable heart failure left ventricular function auxiliary device. Various straws and cavity tunnels are designed in a suction head, outer sucking holes are formed in thelower wall and the outer side of the suction head, a straw is led to a proximal end conical cavity inwards, a one-way valve is designed at a position communicated with the cavity in a pipeline of thestraw, the straw is communicated with an inner cavity of an air bag through the one-way valve, a single channel is connected with the drop-shaped suction head in a straw valve crossing section, a distal end is communicated with an air bag chamber, four one-way valves are arranged on the outer wall of the trapezoid side surface of a capsule and communicated with an inner cavity of the air bag chamber through channels, conical upper end is connected with an air-space tunnel through a trachea, branch tracheae pass the air bag chamber downwards and are opened on the inner side of the wall of theair bag and converged into a main trachea upwards, the main trachea is communicated with outside thought an artery, and the lower end of a guide wire is communicated with the drop-shaped suction head.The device has the advantages that the device can continuously work under the condition of left ventricular function loss, and time is bought for clinical rescue or heart transplantation.

Description

technical field [0001] The invention belongs to the technical field of medical devices and relates to a left ventricular function assisting device for refractory heart failure. Background technique [0002] Acute heart failure: The main manifestations are decreased left ventricular function, that is, decreased left ventricular pumping function, cardiac pump insufficiency, reduced work, left ventricular congestion, resulting in pulmonary congestion and dyspnea in patients. The device can assist the left ventricle to work, reduce the congestion in the lungs, thereby reducing the work of the left ventricle, recovering the pump function of the left ventricle, reducing pulmonary congestion and pulmonary edema caused by acute left ventricular insufficiency, and relieving symptoms such as dyspnea and wheezing. , to help patients successfully pass through acute myocardial infarction, acute left ventricular insufficiency and high-risk periods caused by other reasons, and achieve smoo...

AI Technical Summary

Problems solved by technology

2. The Impella system is a constant-speed operation system that requires arterial incision and implantation. Although it is easy to operate, it can be used for left or right ventricular assisted circulation; but it also needs to preserve the left ventricular function, so the patient's tolerance is poor. Moreover, the device cannot simulate the rhythmic pulsation of human blood flow, so it will cause the continuous expansion of blood vessels such as the aorta, causing the patient's blood pressure to rise, causing headaches and other discomfort

3. Systems pLVAD, the pump is outside the body and needs to be implanted through the chest. The pump tube is connected to the device through the skin, and the pump with different power and cardiac output can be replaced according to the needs without re-replacing the catheter system; but it significantly increases the patient's tolerance to surgery risk, increased chance of infection

[0003] The above-mentioned devices have their own advantages and disadvantages. The main disadvantage is that the left ventricle can be completely replaced, or the function of the systolic pump of the left ventricle is required to be preserved, that is, the left ventricle is either completely replaced and cannot achieve physiological pumping, or the function of the left ventricle is required to be preserved and only a very small part can be achieved. It assists the left ventricle to work, but cannot replace the function of the left ventricle to a large extent, and most of the acute left heart failure, especially the acute myocardial infarction caused by acute occlusion of the anterior descending coronary artery, is due to the loss of left ventricular pump function, so its clinical The application indications are relatively limited and the effect is poor

Moreover, the above 1 and 2 devices require open chest for heart replacement, or partial heart replacement, which will cause large trauma and poor effect, especially poor long-term effect and many complications.

Most of the left ventricular assist devices currently in clinical use are non-cardiac-gated types, which cannot be synchronized with ventricular contraction, so they cannot simulate human hemodynamics well, and the blood perfusion effect on organs is poor

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