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
时，行分次扎止血带和送管后松止血带
功率。
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时，行分次扎止血带和送管后松止血带功率。
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