title: IV. Evaluation of dichromatic earpiece densitometry in children with left-to-right shunts.
abstract: Earpiece densitometry was performed in 60 infants and children with left-to-right cardiovascular shunts. The method was found to possess a high diagnostic sensitivity with respect to identification of the left-to-right shunt. Earpiece densitometry was in this respect clearly superior to conventional method using oxygen saturation figures. Quantitation of pulmonary blood flow by both densitiometric and oxygen content technique in a small number of patients indicates that the dye dilution technique gives values somewhat in excess of the Fick method. It is concluded that quantitation of the magnitude of the left-to-right shunt and pulmonary blood flow is disturbed by the fact that indicator material is recirculated before the ascending limb of the primary curve is fully inscribed.
mesh_terms: D000293:Adolescent; D002302:Cardiac Output; D002648:Child; D002675:Child, Preschool; D003720:Densitometry / Q000379:methods*; D004395:Dye Dilution Technique; D005069:Evaluation Studies as Topic; D005260:Female; D006343:Heart Septal Defects / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D008297:Male; D010100:Oxygen / Q000097:blood; D011652:Pulmonary Circulation
chemical_list: D010100:Oxygen