It shows that successfulness in puncturing can be more easily achived by applying tourniquets in several times and releasing the tourniquets after each cannulation when a less venosity appears.

说明利用套管针在静脉充盈不佳血管穿刺时，行分次扎止血管后松止血以提高穿刺成。

Techniques to resolve the difficult cannulation cases include tapered tip catheter, guide wire, papillotome, and precut endoscopic papillotomy (EPT).

于较困难之病例，尖细型管子，导引线方法，电刀及内视镜乳突先前切开术乃解决方法。