酒井 泰彦, 菱田 仁, 坂部 慶幸, 宮城 裕, 野村 雅則, 水野 康

Yasuhiko SAKAI, Hitoshi HISHIDA, Hiroyuki SAKABE, Yutaka MIYAGI, Masanori NOMURA, Yasushi MIZUNO

名古屋保健衛生大学医学部内科

Department of Internal Medicine, Fujita-Gakuen University School of Medicine

キーワード : inferior vena cava, venous return, central venous pressure, tourniquet, nitroglycerine

Changes in size of the inferior vena cava and their relations to venous return and central venous pressure were studied by measuring transverse corss-sectional area of the inferior vena cava corrected by body surface area, named as inferior vena cava index (IVC·I, cm²/m²) using cross-sectional ultrasonography. Measurements were done at the resting expiratory level.
In 14 normal men, aged 20 to 24 years, IVC·I was 2.23±0.10 cm²/m² (mean±SE). IVC·I tended to be slightly increased after leg raising to the angle of 70 degree (2.26±0.16, PPPPPIn 18 patients with various heart diseases IVC·I correlated closely with central venous pressure (r=0.93, P2O = 4.92×IVC·I – 1.67). In conclusion, IVC·I well reflects changes in venous return and central venous pressure.