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
针在静脉充盈不佳血穿刺时，行
次扎止血带和
后松止血带可以提高穿刺成功率。
，翅脉；静脉血过多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.
说明利针在静脉充盈不佳血穿刺时，行次扎止血带和后松止血带可以提高穿刺成功率。
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