Bazrafshan Fatemeh, Irajpour Alireza, Abbasi Saeed, Mahaki Behzad
Student Research Center, School of Nursing and Midwifery, Isfahan University of Medical Sciences, Isfahan, Iran.
Nursing and Midwifery Care Research Centre, Department of Critical Care Nursing, Faculty of Nursing and Midwifery, Social Determinants of Health Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.
Adv Biomed Res. 2016 Sep 29;5:157. doi: 10.4103/2277-9175.188488. eCollection 2016.
"Persian Weaning Tool" (PWT) is the only specific, national protocol designed to assess patients' readiness for weaning from mechanical ventilation in Iran. This study was developed to determine the validity and reliability of this protocol.
This is a psychometric study conducted on 31 patients connected to mechanical ventilation were ready from weaning according to anesthesiologist's diagnosis and was selected through convenient sampling. The patients selected from Intensive Care Units (ICUs) of Al-Zahra Hospital in Isfahan. The sheet data collection includes demographic data, PWT; Burn's Wean Assessment Program (BWAP), and Morganroth's scale. To determine the inter-rater reliability between researcher and his partner, Pearson correlation and paired -test were used. To assess the criterion validity of the PWT in relation to Burn's and Morganroth's weaning scales (as criteria), Pearson correlation and McNemar tests were used. To specify a minimum acceptable score of the PWT for weaning from mechanical ventilation, receiver operating characteristic curve was used.
The results showed that there was statistically significant correlation between score of PWT and BWAP ( = 0.370 with < 0.05) and there were no statistically significant differences between these tools in terms of identification of patients' readiness for weaning ( = 0.453). There was statistically significant correlation between PWT score obtained by researcher and his colleague ( = 0.928), and the reliability of this tool was approved. The PWTs cut of point was calculated as 57 (sensitivity = 0.679, specificity = 1).
The reliability and validity of the PWT were confirmed for this study's sample size. Consequently, the findings of this study can be used to measure the PWTs effectiveness and applicability in ICUs.
“波斯断奶工具”（PWT）是伊朗唯一专门设计用于评估患者机械通气撤机准备情况的国家方案。本研究旨在确定该方案的有效性和可靠性。
这是一项针对31例接受机械通气患者的心理测量学研究。这些患者根据麻醉医生的诊断已准备好撤机，并通过便利抽样选取。患者选自伊斯法罕市阿尔-扎赫拉医院的重症监护病房（ICU）。数据收集表包括人口统计学数据、PWT；伯恩撤机评估程序（BWAP）和摩根罗斯量表。为确定研究者与其搭档之间的评分者间信度，使用了皮尔逊相关性分析和配对检验。为评估PWT相对于伯恩和摩根罗斯撤机量表（作为标准）的标准效度，使用了皮尔逊相关性分析和麦克尼马尔检验。为确定机械通气撤机时PWT的最低可接受分数，使用了受试者工作特征曲线。
结果表明，PWT评分与BWAP评分之间存在统计学显著相关性（ = 0.370， < 0.05），并且这些工具在识别患者撤机准备情况方面无统计学显著差异（ = 0.453）。研究者与其同事获得的PWT评分之间存在统计学显著相关性（ = 0.928），该工具的可靠性得到认可。PWT的切点计算为57（敏感性 = 0.679，特异性 = 1）。
对于本研究的样本量，PWT的可靠性和有效性得到了证实。因此，本研究结果可用于衡量PWT在ICU中的有效性和适用性。
