Department of Radiology, North China Petroleum Bureau General Hospital, Renqiu, 062552, Hebei, China,
Radiol Med. 2015 Apr;120(4):386-92. doi: 10.1007/s11547-014-0463-3. Epub 2014 Oct 28.
Aortic dissection (AD) is a serious, life-threatening disease. It is currently crucial for AD patients to be transferred to a specialised hospital in a safe and timely manner. For this reason, the search for clinical and imaging changes related to transportation risk is becoming increasingly important.
The transportation risks of AD patients were assessed by studying the correlation between computed tomography angiography (CTA) parameters and shock index.
Thirty-six cases of AD confirmed with 64-slice volumetric CT (VCT) (18 cases of Stanford type A and 18 cases of type B) were divided into a high-risk group (14 cases, six Stanford type A and eight type B) and a low-risk group (22 cases, 12 Stanford type A and 10 type B) according to the modified Early Warning Score. The shock index (ratio of heart rate to systolic blood pressure) and measured CTA parameters were compared between the high-risk group and the low-risk group, and the correlation between the measured CTA parameters and shock index was analysed.
The shock index and ratio of false/true lumen were compared between Stanford type A and type B, and no statistically significant differences were found. The shock index and ratio of false/true lumen were compared between the high-risk group and low-risk group, revealing a statistically significant difference (p < 0.05). Moreover, a significant linear correlation was found between the ratio of false/true lumen and the shock index (r = 0.691; p = 0.001).
The higher the shock index and the ratio of false/true lumen are, the greater the transportation risk for AD patients. The shock index and the ratio of false/true lumen proved to be essential clinical and radiological indices for assessing the transportation risk of AD patients.
主动脉夹层（AD）是一种严重的、危及生命的疾病。目前，对于 AD 患者来说，关键是要安全、及时地转往专门的医院。出于这个原因，寻找与转运风险相关的临床和影像学变化变得越来越重要。
通过研究 CT 血管造影（CTA）参数与休克指数之间的相关性，评估 AD 患者的转运风险。
将 36 例经 64 层容积 CT（VCT）证实的 AD 患者（18 例 Stanford 型 A，18 例 Stanford 型 B）根据改良早期预警评分分为高危组（14 例，6 例 Stanford 型 A，8 例 Stanford 型 B）和低危组（22 例，12 例 Stanford 型 A，10 例 Stanford 型 B）。比较高危组与低危组之间的休克指数（心率与收缩压之比）和测量的 CTA 参数，并分析测量的 CTA 参数与休克指数之间的相关性。
Stanford 型 A 与型 B 之间比较休克指数和真假腔比值，无统计学差异。高危组与低危组之间比较休克指数和真假腔比值，差异有统计学意义（p<0.05）。而且，真假腔比值与休克指数之间存在显著的线性相关性（r=0.691；p=0.001）。
休克指数和真假腔比值越高，AD 患者的转运风险越大。休克指数和真假腔比值是评估 AD 患者转运风险的重要临床和影像学指标。
