Yen Christopher J, Mehollin-Ray Amy R, Bernardo Felisa, Zhang Wei, Cassady Christopher I
Department of Radiology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX, 77030, USA.
Department of Radiology, Texas Children's Hospital, Houston, TX, USA.
Pediatr Radiol. 2019 Jan;49(1):46-50. doi: 10.1007/s00247-018-4254-1. Epub 2018 Sep 27.
Motion remains a major limitation of fetal magnetic resonance imaging (MRI). Some centers have required mothers to fast before MRI in an effort to reduce motion; however, there is no current literature that describes the effect of maternal diet on fetal activity.
The objective is to define associations between specific foods and beverages consumed before and the severity of fetal motion during fetal MRI.
Patients were asked to recall the specific foods or drinks consumed before their scan. An experienced technologist rated the level of fetal activity on a 3-point scale, from much less motion than normal (1) to much more (3). Two hundred twenty-eight patients were included. A non-inferiority test was used to establish statistical equivalence between the MR scores of those having a particular food item and those not. For items not shown to be equivalent, an additional superiority analysis evaluated for the presence of any significant difference. Additional data on time from meal to MRI and amniotic fluid index were also analyzed.
Eleven of 15 comparisons were statistically significant for equivalence (P<0.05). In the remaining four categories, a superiority analysis revealed no significant differences. Analysis of meal-to-scan times showed no significant association with mean MR score (P=0.57). Amniotic fluid index correlated positively with scores, but the association was not statistically significant (P=0.39).
Neither fasting nor a specific consumption was associated with a significant difference in fetal motion on MR. It is therefore likely unnecessary for mothers to alter their diets on the day of an MRI study.
运动仍然是胎儿磁共振成像(MRI)的一个主要限制因素。一些中心要求母亲在MRI检查前禁食,以减少胎动;然而,目前尚无文献描述母亲饮食对胎儿活动的影响。
确定胎儿MRI检查前食用的特定食物和饮料与胎儿运动严重程度之间的关联。
要求患者回忆扫描前食用的特定食物或饮料。一位经验丰富的技术人员采用3分制对胎儿活动水平进行评分,从比正常情况胎动少得多(1分)到多得多(3分)。共纳入228例患者。采用非劣效性检验来确定食用特定食物的患者与未食用者的磁共振成像(MR)评分之间的统计学等效性。对于未显示等效性的项目,进行额外的优效性分析以评估是否存在任何显著差异。还分析了从进食到MRI检查的时间以及羊水指数的其他数据。
15项比较中有11项在统计学上具有等效性(P<0.05)。在其余四类中,优效性分析未发现显著差异。进食至扫描时间的分析显示与平均MR评分无显著关联(P=0.57)。羊水指数与评分呈正相关,但该关联无统计学意义(P=0.39)。
禁食和特定的食物摄入与胎儿在MR检查中的运动无显著差异。因此,母亲在MRI检查当天改变饮食可能没有必要。