Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan.
Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.
Jpn J Radiol. 2018 Mar;36(3):215-222. doi: 10.1007/s11604-018-0718-3. Epub 2018 Jan 11.
Children with congenital heart diseases (CHDs) may need to be followed up with contrast-enhanced CT following the Fontan operation because complications such as the occlusion of conduits may occur. The purpose of the present study was to develop an adequate contrast-enhanced CT protocol for children with CHD following the Fontan operation.
Between July 2012 and July 2017, 29 CT examinations for 26 patients aged 2-11 years (median 5 years) with CHD following the Fontan operation were performed using dual-source CT. A non-ionized contrast medium was injected through the dorsum manus vein. Scanning began 60 or 70 s after the start of the injection. The delayed phase was randomly selected to be 60 s in 14 cases and 70 s in 15 cases. We evaluated the enhancement of conduits following the Fontan operation at delayed phases.
The CT numbers of conduits at 60 and 70 s were 185 ± 46 and 185 ± 31 HU, respectively (P = 0.97).
In contrast-enhanced CT for children after the Fontan operation, both of the delayed phases (60 and 70 s) appeared to be adequate for evaluating intraconduit patency.
患有先天性心脏病（CHD）的儿童在 Fontan 手术后可能需要进行增强 CT 随访，因为可能会发生导管闭塞等并发症。本研究旨在为 Fontan 手术后的 CHD 儿童制定适当的增强 CT 方案。
2012 年 7 月至 2017 年 7 月，对 26 例 2-11 岁（中位数 5 岁）Fontan 手术后 CHD 患儿的 29 次 CT 检查使用双源 CT 进行。通过手背静脉注入非离子型造影剂。注射开始后 60 或 70 s 开始扫描。延迟期随机选择 60 s 14 例，70 s 15 例。我们评估了 Fontan 手术后导管的延迟期增强情况。
导管在 60 s 和 70 s 的 CT 值分别为 185 ± 46 和 185 ± 31 HU（P = 0.97）。
在 Fontan 手术后儿童的增强 CT 中，60 s 和 70 s 这两个延迟期似乎都足以评估导管内通畅性。
