van Rooyen Marthinus B, Pitcher Richard D
Division of Radiodiagnosis, Department of Medical Imaging and Clinical Oncology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.
Division of Radiodiagnosis, Department of Medical Imaging and Clinical Oncology, Faculty of Medicine and Health, Stellenbosch University, Cape Town, South Africa.
SA J Radiol. 2020 Dec 1;24(1):1946. doi: 10.4102/sajr.v24i1.1946. eCollection 2020.
Increasing demand for magnetic resonance imaging (MRI) has contributed to extended patient waiting times worldwide. This is particularly true in resource-limited environments, prompting this institutional workflow analysis.
To determine the 'pre-' and 'post-scan' times for normal-hour MRI studies conducted at a tertiary-level, public-sector South African hospital and to assess any association with demographic details, patient characteristics, anatomical site and scan parameters. A secondary objective was determination of the average daily MR 'down' time.
A prospective descriptive study stratifying MRI workflow into 'pre-scan', 'scan', 'post-scan' and 'down' times. During 'pre-' and 'post-scan' times patients occupied the scanner whilst staff performed tasks indirectly contributing to image acquisition. During 'down' time no patient occupied the MRI room. 'Pre-' and 'post-scan' times were compared with demographic details, patient characteristics, anatomical site and study parameters, utilising correlation analysis or analysis of variance (ANOVA).
A total of 223 patients ( = 223) underwent 286 investigations in the 23-day review period. Seventy per cent of routine working time was utilised in image acquisition. The 'pre-' and 'post-scan' times together accounted for 19% and 'down' time for 11% of working time. Prolonged 'pre-' and 'post-scan' times were independently associated with age less than 12 years, anaesthesia, sedation and immobility ( < 0.01 in all cases). The longest median combined 'pre-' and 'post-scan' time by anatomical site (cholangiopancreatography, 21:46 min) was more than six times the shortest (pituitary fossa, 3:11 min).
A critical analysis of magnetic resonance 'pre-' and 'post-scan' times can provide valuable insights into opportunities for enhanced service efficiency.
全球范围内，对磁共振成像（MRI）需求的不断增加导致患者等待时间延长。在资源有限的环境中尤其如此，这促使我们进行本次机构工作流程分析。
确定南非一家三级公立部门医院在正常工作时间进行的MRI检查的“扫描前”和“扫描后”时间，并评估其与人口统计学细节、患者特征、解剖部位和扫描参数之间的任何关联。第二个目的是确定平均每日MR“停机”时间。
一项前瞻性描述性研究，将MRI工作流程分为“扫描前”、“扫描”、“扫描后”和“停机”时间。在“扫描前”和“扫描后”时间内，患者占据扫描仪，而工作人员执行间接有助于图像采集的任务。在“停机”时间内，没有患者占用MRI室。使用相关分析或方差分析（ANOVA）将“扫描前”和“扫描后”时间与人口统计学细节、患者特征、解剖部位和研究参数进行比较。
在为期23天的审查期内，共有223名患者（n = 223）接受了286项检查。70%的常规工作时间用于图像采集。“扫描前”和“扫描后”时间加起来占工作时间的19%，“停机”时间占11%。“扫描前”和“扫描后’时间延长与年龄小于12岁、麻醉、镇静和不能活动独立相关（所有情况下P < 0.01）。按解剖部位划分，最长的中位联合“扫描前”和“扫描后”时间（胰胆管造影，21:46分钟）是最短时间（垂体窝，3:11分钟）的六倍多。
对磁共振“扫描前”和“扫描后’时间进行批判性分析，可以为提高服务效率的机会提供有价值的见解。
