Objective. To compare the rate of respiratory decline using percent normal forced vital capacity (% FVC) measurements before and after posterior spinal fusion.

目的。使用目前常用的用力肺活量(FVC)指标来判断脊柱后路融合手术后呼吸功能的降低情况。

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Pulmonary function tests(PFT), including forced vital capacity(FVC), forced the first second of expiratory volume (FEV1) and FEV1/FVC.

肺功能检查结果。 包括用力肺活量（FVC），第一秒时间肺活量（FEV1）和一秒率（FEV1／FVC）等。

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The total amount of air they could blow out after a deep breath was also measured (Forced Vital Capacity, FVC), but there was little effect on this measure.

最大肺活量是指在深吸气之后呼出的最大气量，它与肺功能没有太大关系。

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