[An experimental study of the construction of a new right ventricle]

This study was undertaken to design and estimate the method to construct a new right ventricle in single ventricle. Twenty five mongrel dogs were used. In this study three types of conduits were used. In Group A vinyl tube, in Group B Woven Dacron tube and in Group C organized Woven Dacron tube were used. Under total cardiopulmonary bypass right atrium was incised. The conduit was inserted through tricuspid annulus and right ventricle into pulmonary trunk. The conduit was fixed at pulmonary trunk and tricuspid annulus. Right ventricle was made closed cavity, and right ventricular pressure affected pulmonary arterial pressure through the conduit wall. In this study right ventricle was regarded as single ventricle. Hemodynamic investigation revealed that central venous pressure must be elevated to get the normal cardiac output. Effective pulse pressure was obtained in the pulmonary artery. Pulmonary vascular resistance decreased as increasing of the pulmonary pulse pressure. Pulmonary pulse pressure was significantly low in group C. It was considered that the intra-ventricular elastic conduit was new method to obtain the pulmonary pulse pressure.