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为了观察左、右侧卧位对单侧胸腔积液患者肺内气体交换的影响，我们系统观察了15例单侧（结核性）胸腔积液患者体位变化时动脉血氧分压变化情况。分别让患者健、患侧卧位各15min，取挠动脉血进行血气分析。结果显示健侧卧位时平均氧分压显著高于患侧卧位时测值（P＜0．05）。两种体位测得的氧分压的这种变化主要机理可能归因于不同体位时通气／血流比率不同。本文的研究结果将有助于临床护士指导单侧胸腔积液患者选择合适体位进行治疗和护理，以充分发挥键侧肺的气体交换功能。
In order to observe the effect of left and right lateral position on intrapulmonary gas exchange in patients with unilateral pleural effusion, we systematically observed the changes of arterial partial pressure of oxygen in 15 patients with unilateral tuberculous pleural effusion. Respectively allow patients to health, ipsilateral lateral position of the 15min, take the artery blood for analysis of blood gas. The results showed that the average partial pressure of oxygen in the healthy lateral position was significantly higher than that in the ipsilateral position (P <0.05). The main mechanism for this change in oxygen partial pressure measured at both positions may be due to different ventilation / blood flow ratios at different positions. The results of this study will help clinical nurses guide patients with unilateral pleural effusion to choose the appropriate position for treatment and care to give full play to the key side of the lung gas exchange function.