Showing papers on "Perfusion scanning published in 1968"

Postural effect on the distribution of the pulmonary arterial blood flow.

Abstract: The postural effect of lateral decubitus position on the distribution of pulmonary arterial blood flow was assessed in 9 normal subjects and 31 patients with pulmonary tuberculosis by radioisotope perfusion scanning of the lungs. The perfusion of the dependent lung was larger than that of the supine lung with out exception. In both normal and tuberculous subjects, the average overall ratio of the pulmonary arterial blood flow in the dependent lung was 1.1 to 1.2 times that of the supine lung in any of the right and left lateral decubitus positions, and this was assumed to be due to gravitational effect. It was clarified that the increase in oxygen uptake in the dependent lung so far reported by many investigators was due to increased distribution of the pulmonary arterial blood flow which was related to gravitational effect.

Studies on Ex-Vivo liver perfusion

Abstract: resected. Pe r cent in t rahepat ic shunt was calculated f rom the radioact ivi ty of the resected l iver and tha t of the injected solution added to the l iver wi th the same kind of lesion. Per cent intrahepat ic shunt of ra ts wi th acute carbon te t rachlor ide intoxication and rats with fat ty l iver due to choline deficiency was almost the same as the normal rats . Rats wi th hepatic c i r rhosis showed marked increase of per cent in t rahepat ic shunt. There was very s l ight difference of per cent in t rahepat ic shunt between rats wi th hepatic carcinoma due to 3'-methyl-DAB and conrol rats. This can be ascr ibed to the facts tha t the cancerous t i ssue is supplied by the hepatic ar tery and in t rahepat ic shunted blood flow in the cancerous t i ssue is not measured by the method of in t rapor ta l injection.