[New conditions for evaluating static compliance].

Static compliance (Cst), time course and clinical and diagnostic significance of relationship between Cst and Vinsp were studied in 97 patients with congenital heart diseases aged over 3 years after open-heart surgery for correction of the defect during uneventful immediate postoperative period. Three groups of patients were distinguished: 1) patients operated on for Fallot's tetralogy without a previous aortopulmonary anastomosis (TF-1); 2) patients with Fallot's tetralogy with a previous systemic pulmonary anastomosis (TF-2); 3) patients operated on for atrioventricular septal defects and incomplete atrioventricular communication. Age subgroups of 3-5, 6-8, 9-11, and 12-15 years were singled out in each group. The proposed modified method for measuring Cst in children aged over 3 years operated on for congenital heart disease more accurately and reliably characterized the status of lung parenchyma. As a result, the correlation (r) between Cst and Vinsp in all nosological groups and age subgroups was much higher than was previously reported.