Arterial Occlusion Complicating Thoracic Outlet Compression Syndrome

8. The pulmonary vascular resistance ranged between 10 and 45 units (800 to 3,600 dynes sec./cm.'), and averaged 22 units in patent ductus, 20 units in Eisenmenger's complex, and 17 units in atrial septal defect. When considering the resistance, due allowance should be made for the smaller blood flows of infants and small children. 9. The arterial oxygen saturation (femoral in cases of patent ductus) averaged between 77 and 82% in all groups, and was remarkably close to the mean in three-quarters of all cases.