Unger F, Deutsch M, Enenkel H, Fasching W, Losert U, Polzer K, Stellwag F, Thoma H, Wolner E, Navratil J
Med Instrum. 1976 Sep-Oct;10(5):256-9.
A simple method was developed to aid the patient with low cardiac output syndrome following cardiac surgery. The concept was shown to be feasible in electric circulatory analog studies and verified in 20 dog experiments. A Dacron graft (end-to-side) through the right second intercostal space connects the ascending aorta to the subcutaneously implanted, ellipsoidal-shaped artifical ventricle. A spherical polyurethane balloon is positioned in the aorta distal to the Dacron graft via the femoral artery. The ventricle and balloon are pneumatically driven synchronously with the ECG. In natural systole the balloon is inflated, occluding the aorta, and the artificial ventricle sucks the entire stroke volume. In natural diastole the balloon deflates and the artificial ventricle ejects the blood into the peripheral arteries. With this system it is possible to maintain a normal systemic pressure and have high hemodynamic efficiency. The left ventricular systolic pressure is 85 percent unloaded. The systolic wave is turned 180 degrees to the natural. After treatment, the device can be removed without thoracotomy.
开发了一种简单的方法来辅助心脏手术后患有低心输出量综合征的患者。该概念在电动循环模拟研究中被证明是可行的，并在20只狗的实验中得到验证。一根涤纶移植血管（端侧吻合）通过右第二肋间间隙将升主动脉与皮下植入的椭圆形人工心室相连。一个球形聚氨酯气囊通过股动脉放置在涤纶移植血管远端的主动脉中。心室和气囊与心电图同步进行气动驱动。在自然收缩期，气囊充气，阻塞主动脉，人工心室吸入整个心搏量。在自然舒张期，气囊放气，人工心室将血液排入外周动脉。使用该系统可以维持正常的体循环压力并具有较高的血流动力学效率。左心室收缩压卸载85%。收缩波相对于自然波翻转了180度。治疗后，无需开胸即可取出该装置。
