Yoshida S, Hata J, Haruma K, Kusunoki H, Sumii K, Kajiyama G
First Department of Internal Medicine, Hiroshima University School of Medicine, Japan.
J Ultrasound Med. 2000 Nov;19(11):751-5. doi: 10.7863/jum.2000.19.11.751.
Although it is important to assess gastrointestinal blood flow, no generally useful, noninvasive assessment method has been established. Harmonic flash echo imaging, which is an intermittent second harmonic imaging technique, has recently become available to evaluate blood flow. We investigated the usefulness of harmonic flash echo imaging in the assessment of the gastrointestinal tract, and we used this technique to study the effect of nicotine on small bowel blood flow. Harmonic flash echo imaging was performed at the beginning of intravenous injection of a contrast agent. It was also performed on the small bowel immediately before and 10 min after nicotine administration to evaluate blood flow. Gastric and small bowel walls were clearly enhanced on the primary images. Small bowel enhancement, which is regarded as transmural blood flow, significantly decreased after nicotine administration. Harmonic flash echo imaging appears to be useful in the assessment of the transmural blood flow in the gastrointestinal wall.
虽然评估胃肠道血流很重要，但尚未建立普遍适用的非侵入性评估方法。谐波闪光回波成像作为一种间歇性二次谐波成像技术，最近已可用于评估血流。我们研究了谐波闪光回波成像在胃肠道评估中的实用性，并使用该技术研究尼古丁对小肠血流的影响。在静脉注射造影剂开始时进行谐波闪光回波成像。在尼古丁给药前及给药后10分钟也对小肠进行该成像以评估血流。在原始图像上胃和小肠壁明显增强。被视为跨壁血流的小肠增强在尼古丁给药后显著降低。谐波闪光回波成像似乎对评估胃肠道壁的跨壁血流有用。
