中文摘要：

目的：为了降低CT引导下经皮肺穿刺活检的气胸并发症发生率,我们采用了＂液性撤退法＂。本文初步探讨液性撤退法与同轴法共同应用对于CT引导下经皮肺穿刺活检气胸并发症的减少作用。方法：回顾性分析从2013年1月至2014年12月38例采用同轴法联合液性撤退法进行CT引导下经皮肺穿刺活检的病人,主要研究气胸的发生率。结果：38例肺穿病人中,37例获得明确的病理结果。气胸共发生4例（10.5%）,均为轻度气胸,1例操作中发生少量出血（2.6%）,6例肺穿后少量痰中带血（15.8%）,无感染、针道种植转移或空气栓塞的发生。结论：采用同轴法联合我们首创的液性撤退法,可准确、安全地对肺部病灶进行活检,与单纯应用同轴法比较（气胸发生率30%左右）,液性撤退法可显著降低气胸的发生率（10%左右）,该方法值得进一步研究和应用。

英文摘要：

Objective： To investigate whether our new-developed ＂ liquid withdrawn＂ technique can reduce incidence of pneumothorax when combined with co-axial technique. Methods： From Jan 2013 to Dec 2014,we studied38 CT-guided percutaneous lung biopsy using co-axial and liquid withdraw techniques. The pneumothorax secondary to biopsy procedure were noted. Pneumothorax was graded as mild,moderate,and severe. Results： Total of 37 cases was diagnosed out of 38 biopsies. 4 cases（ 10. 5%） happened pneumothorax（ all were mild pneumothorax）,bleeding during biopsy happened in 1（ 2. 6%） case,6 cases with a small amount of hemoptysis（ 15. 8%）. No infection,tumor implantation or aeroembolism happened. Conclusion： CT-guided percutaneous lung biopsy using co-axial and liquid withdrawn is an accurate,safe,reliable technique. Compared to co-axial technique without liquid withdraw,the incidence of pneumothorax was reduced from around 30% to around 10%. More studies according to liquid withdraw technique will be conducted in our future work.