劳动姿势对流量-容积曲线的影响——流量限制的波速学说初步验证

Influence of the Working Posture on the Flow-Volume Curve: A Preliminary Identification of the "Wave Speed Theory of Flow Limitation"

作者用“点值法”对成都市郊265例健康男女农民作了流量-容积(F-V)曲线和常规通气功能的测定,并与健康坐位工作者比较。发现农民在高、中肺容积处的流量下降,低肺容积处的流量增加,而且这种改变随年龄的增长变得更加明显。对4名自愿受试者模拟劳动过程中的前倾姿势做多次通气功能检查,其中3人亦有类似的倾向。由此表明,农民出现这种流量形式同劳动姿势密切相关。这一事实也初步验证Dawson等提出的“流量限制的波速学说”的理论和实用意义。

The flow-volume (F-V)curves and routine ventilatory functionswere determined on 265 healthy maleand female farmers in the suburbs ofChengdu. Compared with normal seden-tary persons, the flows at high andmiddle lung volumes in farmers werereduced, but those at low lung volumeswere increased; besides. these phenomenabecame more prominent with aging. Thesome ventilatory functions were perfor-med with forward bending of neck andtrunk in 4 healthy volunteers to mimicthe working posture of farmers. Threeof them had the same tendency withfarmers. These suggested that the changeof flow pattern in farmers is closelyrelated to the working posture. The the-oretical and practical significance of the'wave speed theory of flow limitation'proposed by Dawson is preliminarilyidentified by these facts.