<原著>He-O_2 Flow-Volume曲線による上部気道閉塞の診断(第1報)

概要

論文の詳細を見る
In the diagnosis of the major airway obstruction the F-V curve, which shows a characteristic pattern, provides a useful method for examination. However, when expiring effort is insufficient or the patient has chronic obstructive lung disease complication, it may be difficult to identify the pattern. The purpose of the present paper is to study the utility of the He-O_2 F-V curve for the diagnosis of the upper and central airway obstruction and the possibility as to whether or not the extent of obstruction can be known. In this study six healthy subjects were measured as to simulate upper airway obstruction by inserting external resistance tubes with the inner diameter from 4 to 15 mm, into the air passage. 1) Even when the external resistance increased, FVC did not change. 2) FEV_<1.0> showed no substantial change when the inner diameter was larger than 6 mm, but obviously decreased when 5 mm or smaller. 3) FEV_<1.0>/PF increased as the inner diameter decreased, the increase became distinctive when the inner diameter was under 7mm, FEV_<1.0>/PF reaching 10 ml/l min or more. 4) ΔPF increased as the inner diameter decresed, the increase being significant when the inner diameter was 9 mm. 5) The He-O_2 F-V curve was considered to be useful for the diaznosis of the upper airway obstruction.
近畿大学の論文
1983-12-25