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目的评价浅快呼吸指数(f/VT)在慢性阻塞性肺疾病(COPD)并呼吸衰竭的机械通气患者脱机时的指导意义。方法81例COPD并呼吸衰竭机械通气患者达到临床撤机标准后,监测其浅快呼吸指数(f/VT)。结果撤机成功组(64例)f/VT平均为80±21,撤机失败组(17例)f/VT平均为110±20,撤机成功组f/VT明显低于撤机失败组(P<0.05)。撤机成功组中f/VT≤105者60例,f/VT>105者4例;撤机失败组中f/VT≤105者8例,f/VT>105者9例,以f/VT≤105为标准,其预测撤机成功的灵敏度为93.8%,特异度为52.9%。结论f/VT对COPD并呼吸衰竭患者呼吸机撤离有一定的指导意义,是较好的预测脱机的指标之一。
Objective To evaluate the short-term ventilatory index (f / VT) in the induction of mechanical ventilation in patients with chronic obstructive pulmonary disease (COPD) and respiratory failure. Methods A total of 81 COPD patients with respiratory failure who received mechanical ventilation were monitored for their shallow fast breathing index (f / VT). Results The average f / VT of the weaning success group (64 cases) was 80 ± 21 and that of the failed weaning group (17 cases) was 110 ± 20. The f / VT of the weaning success group was significantly lower than that of the weaning failure group P <0.05). There were 60 patients with f / VT≤105 and 4 patients with f / VT> 105 in the weaning success group, 8 patients with f / VT≤105 and 9 patients with f / VT> 105, ≤ 105 as the standard, the sensitivity of prediction of weaning success was 93.8% and the specificity was 52.9%. Conclusions f / VT has some guiding significance for ventilator evacuation in patients with COPD and respiratory failure, which is one of the better predictors of offline.