Chung Joanne W Y, Ng Winnie M Y, Wong Thomas K S
School of Nursing, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
J Clin Nurs. 2002 Jul;11(4):457-61. doi: 10.1046/j.1365-2702.2002.00645.x.
To investigate whether the application of manual pressure to the injection site before intramuscular injection reduces pain. An experimental study with intrasubject comparison was conducted using manual pressure to reduce pain associated with intramuscular injection. Seventy-four subjects, participating in an immunization vaccination campaign, were recruited by convenience sampling from a university. They were required to receive two doses of vaccines via intramuscular injections. One was given in a conventional way, i.e. without manual pressure being applied prior to the injection (control condition). The other was given with manual pressure being applied prior to the injection (experimental condition) for 10 seconds. The two conditions were randomly allocated for each subject. The instrument for measuring the perceived pain intensity was the Pain Intensity Verbal Rating Scale (Cantonese). To ensure the consistency of manual pressure being applied to the injection site, a mechanical pressure sensor device was used to record the manual pressure being applied. The mean manual pressure applied was 190.82 mmHg (SD=5.25). Results demonstrated a significant difference in the perceived pain intensity for experimental and control conditions. Subjects with manual pressure applied before injections reported lower pain intensity scores, whilst those without the application of manual pressure before injections reported higher pain intensity scores. Applying manual pressure to an injection site before performing an injection could be an effective means of decreasing pain intensity.
探讨肌肉注射前对注射部位施加手动压力是否能减轻疼痛。采用受试者自身对照的实验研究，运用手动压力来减轻与肌肉注射相关的疼痛。通过便利抽样从一所大学招募了74名参与免疫接种活动的受试者。他们需要通过肌肉注射接受两剂疫苗。一剂以常规方式注射，即在注射前不施加手动压力（对照条件）。另一剂在注射前施加手动压力（实验条件）10秒。每个受试者的两种条件随机分配。测量感知疼痛强度的工具是疼痛强度语言评定量表（粤语版）。为确保对注射部位施加的手动压力的一致性，使用了一个机械压力传感器装置来记录所施加的手动压力。施加的平均手动压力为190.82 mmHg（标准差=5.25）。结果表明，实验条件和对照条件下的感知疼痛强度存在显著差异。注射前施加手动压力的受试者报告的疼痛强度得分较低，而注射前未施加手动压力的受试者报告的疼痛强度得分较高。在进行注射前对注射部位施加手动压力可能是降低疼痛强度的有效方法。
