第三期是广泛性腹膜炎，第四期则是穿孔太大(free perforation)造成的粪便性腹膜炎(fecal peritonitis)，这两期病人大都因明显广泛性腹膜炎征兆而接受紧急手术。
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The stone free rate of URL was 100% for lower ureteral stones, There was no ureteral perforation and avulsion happened.
URL对输尿管中下段结石取净率为100%，术中无输尿管穿孔、撕脱等并发症发生。
Conclusion: the main CT signs of the hollow viscera perforation of the abdomen include free gas, free effusion and changes of the greater omentum and mesentery.
结论：腹腔游离气体，腹腔游离积液、大网膜及肠系膜改变是腹腔中空脏器穿孔的主要CT表现。
Based on the analysis of test difficulties, the technique of combining test with perforation and solids-free perforating fluids were employed.
在分析该井测试作业技术难点的基础上，决定采用测试-射孔联作工艺及无固相射孔液。
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