【摘要】 目的：探讨孕妇空腹时长对胎儿MRI检查中胎动频率及检查效率的影响。方法：根据105名孕妇行胎儿头颅MRI检查时空腹时长将其分为空腹≤2 h组（n=50）和空腹>2 h组（n=55）；再根据孕周分为<32周组和≥32周组，以及根据孕妇检查时段分为上午检查组和下午检查组。所有孕妇均在避开日常胎动频繁时段检查，检查前及检查中由护士对孕妇做好个性化心理疏导，以缓解紧张焦躁情绪并平稳呼吸心跳。比较各组孕妇在检查中胎动情况（频繁/不频繁）及检查耗时。结果：孕妇空腹>2 h组平均耗时、胎动频率均显著低于空腹≤2 h组（P<0.05）。孕周及检查时段对MRI检查耗时及胎动频率无明显影响。结论：行胎儿MRI检查前孕妇至少空腹2 h能有效避免频繁胎动，缩短检查耗时，提高MRI检查效率，从而为孕妇MRI检查的合理预约提供依据。更多还原

【Abstract】 Purpose: To investigate the impact of maternal fasting duration on fetal movement frequency and examination efficiency during fetal MRI. Methods: This study included 105 pregnant women scheduled for fetal cranial MRI. They were categorized as follows: 1) fasting duration ≤2 hours group(n=50) and fasting duration >2 hours group(n=55) based on pre-examination fasting time; 2) gestational age <32 weeks group and ≥32 weeks group; 3) morning examination group(before 12:00 noon) and afternoon examination group. All examinations were conducted during non-active fetal movement periods based on individual fetal movement patterns. Prior to and during the procedure, nurses provided personalized psychological counseling to alleviate maternal tension and anxiety, and to promote stable breathing and heart rate. Fetal movement during the examination(categorized as frequent or infrequent) and the total examination time were recorded and compared among the groups.Results: The mean examination time was significantly shorter, and fetal movement frequency was significantly reduced, in the group with a maternal fasting duration >2 hours compared to the ≤2 hours group(P<0.05). Neither gestational age nor the time of day(morning vs afternoon) had a significant impact on the MRI examination time or fetal movement frequency.Conclusion: A maternal fasting period of at least 2 hours before fetal MRI can effectively reduce frequent fetal movements, shorten examination time, and improve the efficiency of MRI examinations. These findings provide a basis for reasonable scheduling of MRI examinations for pregnant women.更多还原