司步间歇指令通气与压力支持通气模式进行自主呼吸试验对机体影响的比较

目的探讨同步间歇指令通气（SIMV）与压力支持通气（PSV）两种模式进行自主呼吸试验（SBT）对机体的影响是否不同。方法对ICU内需要呼吸机支持治疗超过48h的危重患者，使用SIMV或PSV模式进行SBT。对入选患者进行APACHEII评分，同时记录SBT前、SBT后2h和SBT后24h患者的呼吸、血压、心率以及测末梢血糖等指标。结果使用SIMV模式进行SBT的有14例（男9例，女5例），使用PSV模式进行SBT的有18例（男15例，女3例），两组患者的APACHEII评分无差异．且SBT前、SBT后2h及SBT后24h的呼吸频率、心率、平均动脉压以及末梢血糖等指标也均无差异（均P〉0．05）。结论使用SIMV模式或PsV模式进行SBT对呼吸循环及血糖的影响无差异。

Comparison the impacts of two modes of spontaneous breathing trials on patients with PSV and SIMV

Objective To investigate whether the impacts of two modes of spontaneous breathing trials(SBT) on patients with pressure support ventilation(PSV) and synchronized intermittent mandatory ventilation(SIMV) was the similar.Methods In ICU the critically ill patients requiring mechanical ventilation(MV) more than 48 hours were enrolled in the present study.And the PSV mode or SIMV mode was used during SBT.The APACHEⅡscore was performed for all patients.At the same time the patients′ respiratory rate(RR),heart rate(HR),mean blood pressure(MBP) and blood glucose(BG) were recorded before the SBT and then 2 hours and 24 hours later respectively.The data was analyzed with version 17 of SPSS software.Results There were 14 patients weaned from MV with SIMV and 18 patients with PSV.There was no significant difference in RR,HR,MBP and BG before and 2 hours and 24 hours after weaning between two groups as well as APACHEⅡscore.Conclusion The effects on patients was not significantly different in SBT with PSV modality or SIMV.