Cardiac auxiliary volume amplifier

Abstract

The invention relates to a cardiac auxiliary volume amplifier, which is characterized in that the amplifier comprises an amplifier shell and a double piston. An inner cavity of the amplifier shell comprises a driving cavity and a driven cavity, wherein the volume of the driven cavity is smaller than the volume of the driving cavity; the double piston is placed in the inner cavity of the amplifiershell and slides axially; and the amplifier shell is provided with an air inlet communicated with the driven cavity and an air outlet communicated with the driving cavity. The invention has the advantages that the volume amplifier has the principle of guiding the driving cavity with bigger volume to move for the same distance through the driven cavity with smaller volume and generating bigger volume through the driving cavity so as to amplify the volume. The friction generated by moving the piston can be reduced by using a film sealing ring. When treating a serious difficult treated heart failure, the auxiliary effect is obviously promoted and the circulation is more effectively assisted. The invention can make up the defect that an IABP air pump has insufficient volume.

Description

technical field [0001] The invention belongs to cardiac mechanical assisting devices, in particular to a capacity amplifier for cardiac assisting which is connected with a pneumatic counterpulsation device, provides large-capacity circulation support, and obviously improves the assisting effect of patients with heart failure. Background technique [0002] There are more than 4 million heart failure (HF) patients among adults in our country, and the annual treatment cost is as high as 10 billion yuan, which has brought a huge burden to the country and the people. At present, drug therapy for severe and refractory HF cannot obtain satisfactory results; and heart transplantation is limited by donors. At present, clinically used adjuvant therapy methods for severe refractory HF patients, one is to use axial flow blood pump and centrifugal blood pump to effectively assist circulation, but patients may suffer from bleeding after excessive anticoagulation and thrombosis due to insu...

AI Technical Summary

Problems solved by technology

However, during its application, clinical findings have the following disadvantages: ① due to the volume limitation of the descending aorta and the balloon, the hemodynamic support provided is limited, and it is strongly dependent on the patient's own heart function; ② due to the limitation of the patient's activities, It cannot be used for a long time (generally within 2 weeks); ③ complications such as ischemia and thrombosis at the distal end of the IABP implanted vessel may occur

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