McGowan S, Wood A
Aust J Adv Nurs. 1990 Dec-Feb;7(2):30-9.
This experimental study tested the effects of four different subcutaneous injection techniques on bruising at the injection site. The independent variables of aspiration of the syringe prior to injecting heparin and pressure on the site following injection, and the dependent variable of size of bruising were studied. Aspiration of the syringe had little effect on bruising. After the first injection, fewer subjects who received pressure following the injection had bruising, the difference being significant for females. However analysis of subsequent injections did not support the conclusion that pressure reduces the probability of bruising.
这项实验研究测试了四种不同皮下注射技术对注射部位瘀伤的影响。研究了注射肝素前注射器的回抽以及注射后对注射部位施加压力这些自变量，以及瘀伤大小这个因变量。注射器回抽对瘀伤影响不大。首次注射后，注射后接受按压的受试者出现瘀伤的较少，女性受试者的这种差异具有显著性。然而，后续注射的分析并不支持按压可降低瘀伤发生率这一结论。
