Mean times to enipuncture and successful insertion were similar in both groups. Howeer, there were only three complications (4.6%) in the ultrasonography group compared with 11 (16.9%) in landmark patients.
Mean times to enipuncture and successful insertion were similar in both groups. Howeer, there were only three complications (4.6%) in the ultrasonography group compared with 11 (16.9%) in landmark patients.
穿刺和成功置管平均时间两组相似。不过，超声置管组中只有3例出现并发症（4.6%），对照组有11例（16.9）。