B-0976 Can a contrast-enhanced ultrasound nephrostogram be used instead of a fluoroscopic nephrostogram: preliminary findings

 M. Daneshi, K. Patel, D. Huang, M. Sellars, P. Sidhu | Monday, March 11, 14:00 – 15:30 / Room G/H

Purpose: The use of contrast-enhanced ultrasound (CEUS) has extended beyond traditional uses, and the possibility to delineate percutaneous tubes and drains is achievable. We have compared the traditional fluoroscopic nephrostogram using iodinated contrast agents with CEUS nephrostogram to ascertain the accuracy, utility and convenience of the CEUS nephrostogram.
Methods and Materials: The standard conventional nephrostogram was performed immediately prior to the CEUS nephrostogram. The CEUS nephrostogram technique involved diluting 0.2ml of SonoVue with 40 ml of normal saline and introduced into the renal collecting system via the nephrostomy tube. Digital cine-clips and still images were recorded to allow accurate retrospective comparison by two independent reviewers to the reference standard.
Results: Twelve nephrostomies in 10 patients (median age 64 yrs, range 29-91 yrs, 6 females and 4 males) were performed and reviewed. The renal pelvicalyceal system was visualised in both CEUS and fluoroscopic nephrostograms in 11/12 (92%) with one nephrostomy tube identified as being misplaced. The entire ureter was visualised in 6/12 (50%) with a CEUS nephrostogram compared with 8/12 (75%) using traditional nephrostogram. Fluoroscopic nephrostogram showed drainage of contrast into the bladder in 10/12 (83%) cases compared with 9/12 (75%) using CEUS.
Conclusion: Preliminary results suggest that CEUS nephrostogram is a feasible method to confirm the correct positioning of the nephrostomy tube, image the ureters and determine if there is satisfactory drainage into the bladder. CEUS nephrostogram is a suitable alternative for the traditional nephrostogram in patients with contraindications to iodinated contrast agents or if the procedure needs to be performed at the bedside.

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