Group D, high frequency jet ventilation ( HFJV). Artery and vein blood gas analyses were made after TLV 30 min and OLV 30 min, and the shunt fraction Qs/ Qt calculated as well.
D组,用高频喷射通气(HFJV),并在双肺通气和单肺通气各30min后取动静脉血作血气分析并计算分流率(Qs/Qt)。
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