Keller M S, Chawla H S
J Can Assoc Radiol. 1985 Sep;36(3):223-5.
A diagnosis of patent ductus arterious (PDA) in neonates is occasionally difficult. With an umbilical artery catheter in the descending thoracic aorta, agitated saline or dextrose solutions can be used as a sonographic contrast agent during real-time ultrasound monitoring of the origins of the great arteries. Videorecording is performed during rapid injection of 1-2 ml of sonographic contrast. Detection of echoes in the pulmonary artery signifies a PDA. Angiosonography is a clinically useful bedside procedure performed in the neonatal intensive care unit without the use of ionizing radiation, iodinated contrast or extensive catheter manipulation.
新生儿动脉导管未闭（PDA）的诊断有时颇具难度。在降主动脉置入脐动脉导管后，于实时超声监测大动脉起始部时，可使用振荡生理盐水或葡萄糖溶液作为超声造影剂。在快速注射1 - 2毫升超声造影剂期间进行视频记录。肺动脉内出现回声提示动脉导管未闭。血管超声检查是在新生儿重症监护病房床边进行的一项临床实用检查，无需使用电离辐射、碘化造影剂或进行广泛的导管操作。
