Water-enhanced antegrade MR pyelography in pregnancy: a novel radiation-free approach

被引:1
|
作者
Allen G.N. [1 ]
Buckley B.W. [2 ]
Conroy D.M. [3 ]
Lundon D.J. [1 ,2 ]
MacMathuna P. [1 ]
O’Malley K. [1 ]
Lawler L.P. [1 ]
Ridge C.A. [1 ]
机构
[1] Mater Misericordiae University Hospital, Dublin
[2] University College Dublin, Dublin
[3] Belfast City Hospital, Belfast
关键词
Antegrade MR pyelography; Magnetic resonance imaging; Percutaneous nephrostomy; Pregnancy; Urologic diseases;
D O I
10.1186/s41747-017-0019-0
中图分类号
学科分类号
摘要
Our aim was to determine if water-enhanced antegrade magnetic resonance (MR) pyelography can be an alternative to conventional antegrade pyelography in pregnant patients who require percutaneous nephrostomy placement for urosepsis and/or obstructive uropathy. The pregnant patient was placed supine in a 1.5-T MRI scanner seven days after percutaneous nephrostomy placement using ultrasound. Serial axial and coronal T2-weighted echo-planar fast spin-echo sequences were performed before and after injection of the catheter. The right nephrostomy catheter hub was sterilised using chlorhexidine. Sixty millilitres of sterile water were slowly injected. No Gd-based contrast agent was utilised due to safety concerns for the foetus. MR antegrade pyelography demonstrated the level of ureteric obstruction and the absence of renal calculi using sterile water as a contrast medium injected through a percutaneous nephrostomy followed by T2-weighted imaging. Air bubbles in the injected solution were differentiated from calculi due to their mobility on serial scans and their anti-dependent position. Water-enhanced antegrade MR pyelography was a safe and effective method of imaging the pregnant patient. It served as an alternative to conventional antegrade pyelography and minimised potential risks to the foetus. © 2017, The Author(s).
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