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
针在静脉充盈不佳
时，行分次扎止带和
后松止带可以提高
功率。
过多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.
说明利用套针在静脉充盈不佳时，行分次扎止带和后松止带可以提高功率。
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