Battin M, Maalouf E F, Counsell S, Herlihy A, Hall A, Azzopardi D, Edwards A D
Section of Paediatrics, Imperial College School of Medicine, Hammersmith Hospital, London, UK.
Early Hum Dev. 1998 Sep;52(2):101-10. doi: 10.1016/s0378-3782(98)00024-3.
This study looked for evidence of physiological disturbance in preterm infants undergoing magnetic resonance imaging (MRI).
Intensive care was continued, as appropriate, throughout scanning in each infant. The heart rate, oxygen saturation (SaO2), temperature and mean arterial blood pressure (BP) was monitored during MRI in preterm infants, median gestational age at birth 27 (range 23-32) weeks and median postnatal age at initial MRI, 3 days (range 1-42). The acoustic noise level during imaging was also measured.
2087 min of data were obtained from 39 examinations in 23 infants. The median heart rate was 159 and no bradycardia < 100 or tachycardia > 200 bpm occurred. Although 42 episodes of desaturation < 90% were detected only three were < 80, and these occurred in one infant due to endotracheal tube blockage. The median axillary temperature was 36.9 degrees C (range 35.7-37.8) and median BP (n = 6) was 37 mmHg (24-48). The ambient noise level in the MR system during scanning was 67-72 dBA.
In preterm infants who required intensive care during scanning, MRI could be performed without major physiological instability.
本研究旨在寻找接受磁共振成像（MRI）的早产儿出现生理紊乱的证据。
在对每个婴儿进行扫描的全过程中，酌情持续进行重症监护。对出生时胎龄中位数为27周（范围23 - 32周）、初次MRI检查时出生后年龄中位数为3天（范围1 - 42天）的早产儿在MRI检查期间监测心率、血氧饱和度（SaO2）、体温和平均动脉血压（BP）。同时还测量了成像过程中的噪音水平。
从23名婴儿的39次检查中获取了2087分钟的数据。心率中位数为159，未出现心率<100次/分钟的心动过缓或>200次/分钟的心动过速。虽然检测到42次血氧饱和度<90%的情况，但只有3次<80%，且这3次均发生在一名因气管插管堵塞的婴儿身上。腋窝温度中位数为36.9摄氏度（范围35.7 - 37.8），平均动脉血压中位数（n = 6）为37 mmHg（24 - 48）。扫描期间MR系统中的环境噪音水平为67 - 72 dBA。
对于在扫描期间需要重症监护的早产儿，可在无重大生理不稳定的情况下进行MRI检查。
