阻抗呼吸图对HFJV治疗蒸气吸入性损伤犬的监护作用

Impedance Plethysmograph Monitoring High Frequency Jet Ventilation Treated Dogs with Steam Inhalation Injury

以蒸气吸入性损伤犬为模型，观察高频喷射通气（ＨＦＪＶ）治疗伤犬时不同时间的阻抗呼吸图、动脉血气及气道压力的变化。结果发现，随着时间的推移，肺阻抗呼吸波（ΔＺ）与ＰａＯ＿２变化一致，二者均显著下降，而ＰａＣＯ＿２则升高，气道压力变化与ΔＺ和动脉血气无关。表明阻抗呼吸图能准确反映致伤犬肺通气功能的变化，可作为一项有效的呼吸监测指标，并可评价ＨＦＪＶ的效果。

Nine dogs were injured by steam inhalation and treated with high frequency jet ventila-tion, Impedance plethysmograph,arterial blood gas and airway pressure were observed dur-ing ventilation, The results revealed that both ΔZ value（impedance plethysmograph） andPaO2 decreased significantly, while PaCO2 increased. Changes in airway pressure bore no re-lation to those of ΔZ and arterial blood gases. This indicates that impedance plethysmo-graph may accurately reflect the changes in respiratory function of injuried dogs,so it can bean effective parameter monitoring respiration and used to evaluate the efficiency of HFJV aswell