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首頁> 中文期刊> 《中國醫(yī)療設(shè)備》 >NPB840呼吸機(jī)吸氣壓力觸發(fā)與吸氣流量觸發(fā)比較

NPB840呼吸機(jī)吸氣壓力觸發(fā)與吸氣流量觸發(fā)比較

     
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Objective To understand the difference between the pressure and the lfow velocity as well as the trigger time of the NPB840 ventilator in different modes of positive-end expiratory pressure (PEEP) under the suction pressure and the inspiratory lfow.Methods Connect the FLUKE VT-Plus lfow analyzer series to the measured ventilator and then to the simulated lungs with the Norway active system. Through the active simulation of lungs and patients’ spontaneous breathing, the analyzer acquisited parameters and waveform from the ventilator triggered by spontaneous breathing.Results Under the same mode of PEEP, the trigger for the inspiratory pressure is slightly higher than that of the inspiratory lfow. The lfow rate of the same PEEP is greater than that of the inspiratory pressure. When the PEEP is 0, the trigger time between the pressure and the lfow rate is different. The time difference decreased with the increase of PEEP value. When the PEEP is 15 cmH2O, the trigger time between the inspiratory pressure and the lfow rate is similar.Conclusion After testing the difference between the pressure and the lfow velocity, as well as the difference of the trigger time between the inspiratory pressure and lfow rate in the NPB840 ventilator under different modes of PEEP, it is proved that the sensitivity of NPB840 ventilator under the lfow mode is superior to that under the mode of of inspiratory pressure.%目的：比較NPB840呼吸機(jī)在不同PEEP下吸氣壓力觸發(fā)與吸氣流量觸發(fā)呼吸機(jī)時(shí)觸發(fā)壓力、觸發(fā)流速、觸發(fā)時(shí)間的差異。方法將FLUKE VT-Plus氣流分析儀串聯(lián)在待測呼吸機(jī)與主動(dòng)模擬肺之間，通過主動(dòng)模擬肺模擬病人的自主呼吸，氣流分析儀采集自主呼吸觸發(fā)呼吸機(jī)時(shí)的呼吸參數(shù)及波形。結(jié)果相同呼氣末正壓（PEEP）下壓力觸發(fā)的觸發(fā)壓力略高于流量觸發(fā)的觸發(fā)壓力；相同PEEP下流量觸發(fā)流速要大于壓力觸發(fā)流速。PEEP為0時(shí)，壓力觸發(fā)和流量觸發(fā)時(shí)的觸發(fā)時(shí)間差異最大，隨著PEEP值的增加，壓力觸發(fā)和流量觸發(fā)時(shí)的觸發(fā)時(shí)間差異逐漸減少，當(dāng)PEEP為15 cmH2O時(shí)，兩者的觸發(fā)時(shí)間接近。結(jié)論通過對NPB840呼吸機(jī)在不同PEEP下吸氣壓力觸發(fā)與吸氣流量觸發(fā)呼吸機(jī)時(shí)觸發(fā)壓力、觸發(fā)流速、觸發(fā)時(shí)間的測試，證明NPB840呼吸機(jī)使用流量觸發(fā)方式時(shí)觸發(fā)靈敏度較高，是醫(yī)生在進(jìn)行呼吸機(jī)治療時(shí)靈敏度設(shè)定的首選。

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