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比较压力支持通气（ＰＳＶ）和辅助／控制（Ａ／Ｃ）通气的优缺点。（１）２６例慢性阻塞性肺病（慢阻肺）呼吸衰竭患者经面罩压力支持通气，比较ＰＳＶ模式有效与效果不佳者的临床特点及处理方法；（２）８例患者病情相对稳定后进行ＰＳＶ模式与Ａ／Ｃ模式的比较以及呼气末正压（ＰＥＥＰ）通气的疗效测定。结果：用ＰＳＶ模式，所有患者皆完成了从自主呼吸到面罩机械通气的过渡。此后分别有７例和４例患者需改用 Ａ／ Ｃ或加用 ＳＩＭＶ模式。与Ａ／ Ｃ模式比较，用 ＰＳＶ模式通气不仅耐受性好，且可允许较低的气垫内压，并具有漏气量少、动态死腔小、有效通气量高等优点。低水平ＰＥＥＰ可提高氧分压，而对血流动力学及面罩的密闭性能无不良影响。结论：ＰＳＶ模式可作为经面罩机械通气的首选模式，Ａ／ Ｃ模式则为必要补充，ＰＥＥＰ有一定的应用价值。
Compare the advantages and disadvantages of PSV and A / C ventilation. (1) 26 patients with chronic obstructive pulmonary disease (COPD) respiratory failure were treated with mask pressure supportive ventilation. The clinical features and treatment of PSV mode were compared between the two groups. (2) After 8 patients were relatively stable Comparison of PSV mode with A / C mode and efficacy of positive end expiratory pressure (PEEP) ventilation. Results: In PSV mode, all patients completed the transition from spontaneous breathing to masked mechanical ventilation. Since then there are 7 patients and 4 patients need to switch to A / C or add SIMV mode. Compared with A / C mode, ventilation with PSV mode is not only well tolerated, but also allows lower air cushion pressure, and has the advantages of less air leakage, less dynamic dead space and higher effective ventilation. Low levels of PEEP increase oxygen partial pressure without adversely affecting hemodynamics and mask containment. Conclusion: PSV mode can be used as mask ventilation preferred mode, A / C mode is necessary to add, PEEP has a certain value.