Pan Michael, Harcharik Sara, Moskalenko Marina, Luber Adam, Bernardo Sebastian, Levitt Jacob
Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, USA.
Clin Teach. 2014 Oct;11(6):436-41. doi: 10.1111/tct.12198.
Safe venepuncture technique is a critical skill for health care professionals, to avoid accidental occupational injury. This study investigates whether watching an instructional video improves medical students' ability to perform venepuncture safely.
This was a randomised, controlled, assessor-blinded trial that evaluated the utility of an instructional video, with the primary outcome of the ability to perform venepuncture safely. Forty-two second-year medical students were recruited and randomised to receive either video instruction (group A, n = 20) or no intervention (group B, n = 22). Prior to the study, all students attended an instructor-led workshop on venepuncture. During the study, students were paired and instructed to perform venepuncture on a partner. Performance was assessed using a points-based checklist. Pre- and post-study surveys were conducted to assess confidence with technique.
The mean total checklist score was higher in group A than in group B, with values of 14.15 and 9.18, respectively (p < 0.0001, maximum 18 points). Mean scores were also higher in group A than in group B among students who performed first (p = 0.008) and students who performed second (p = 0.005) within the pair. From the post-procedure survey, only group A rated increased confidence in performing venepuncture after the study (p = 0.008).
Students who watched an instructional video performed venepuncture more effectively and reported greater confidence with the technique. Medical students can benefit from having access to an instructional video on venepuncture as an adjunct to the standard curriculum. Safe venepuncture technique is a critical skill for health care professionals.
安全静脉穿刺技术是医护人员的一项关键技能，可避免意外职业伤害。本研究调查观看教学视频是否能提高医学生安全进行静脉穿刺的能力。
这是一项随机、对照、评估者盲法试验，评估教学视频的效用，主要结果是安全进行静脉穿刺的能力。招募了42名二年级医学生，随机分为接受视频指导组（A组，n = 20）或无干预组（B组，n = 22）。在研究之前，所有学生都参加了由教师指导的静脉穿刺工作坊。在研究期间，学生两两配对，并被指导在同伴身上进行静脉穿刺。使用基于评分的检查表评估操作表现。在研究前后进行调查，以评估对该技术的信心。
A组的平均检查表总分高于B组，分别为14.15分和9.18分（p < 0.0001，满分18分）。在每组中第一个进行操作的学生（p = 0.008）和第二个进行操作的学生（p = 0.005）中，A组的平均得分也高于B组。从操作后调查来看，只有A组在研究后对进行静脉穿刺的信心有所增加（p = 0.008）。
观看教学视频的学生进行静脉穿刺更有效，并且对该技术的信心更高。医学生可以从获取静脉穿刺教学视频作为标准课程的辅助中受益。安全静脉穿刺技术是医护人员的一项关键技能。
