Changes in Intrapulmonary Venous Admixture with Varying Inspired Oxygen Concentration in the Patients with Chronic Pulmonary Diseases : Comparison of Conventional and Corrected Values

慢性肺疾患患者における吸人気酸素濃度による肺内シャント率の変動 : 従来のシャント率と補正シャント率との比較

Changes in Intrapulmonary Venous Admixture with Varying Inspired Oxygen Concentration in the Patients with Chronic Pulmonary Diseases : Comparison of Conventional and Corrected Values

Creators Nakashima Akio

Changes in intrapulmonary venous admixture (Q^^._S/Q^^._P ratio) with varying inspired oxygen concentration (F_1O_2) were discussed in 27 patients with chronic pulmonary diseases. Calculated Q^^._S/O^^._P ratio with conventional method increased during breathing with F_1O_2 above 0.6. However, little increase in corrected Q^^._S/Q^^._P ratio was proved. A difference between conventional and corrected values with F_1O_2 1.0 was nealy 9 percent of total pulmonary blood flow. Therefore, conventional Q^^._S/Q^^._P ratio may be overestimated and corrected values should be needed for discussion on changes in intrapulmonary venous admixture.

[ISSN]0513-1731

[NCID]AN00243156