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Sclerotherapy for Rectal Varices by a Small-Bore Needle Puncture Through the Greater Sciatic Foramen
Shuji Kariya1, Miyuki Nakatani2, Takuji Maruyama2
1Department of Radiology, Kansai Medical University, 2-5-1 Shinmachi, Hirakata, Osaka, 573-1010, Japan. kariyas@hirakata.kmu.ac.jp.
Purpose:
To report a sclerotherapy technique for rectal varices consisting of direct puncture of the superior rectal vein with a small-bore sheathed needle via the greater sciatic foramen without insertion of a sheath or catheter.
Materials And Methods:
The subjects of this retrospective study were three consecutive patients who underwent embolization of rectal varices, two for rupture of rectal varices and one for hepatic encephalopathy and hyperammonemia. A 5% solution of ethanolamine oleate with iodinated contrast agent (5% EOI) was injected through puncture of the superior rectal vein and carried in the blood flow, after which n-butyl cyanoacrylate mixed with lipiodol (NBCA-Lip) was immediately injected to stop the blood flow.
Results:
The 5% EOI and NBCA-Lip were successfully injected in all three patients. There was no movement of NBCA-Lip on plain radiographs or computed tomography (CT) immediately after injection, and the 5% EOI remained within the rectal varices. The mean procedure time was 53 min (42-60 min). On contrast-enhanced CT 1 month after the procedure, there was no contrast enhancement of the rectal varices that had been seen on preoperative CT in any of the three patients, confirming that the rectal varices had disappeared.
Conclusion:
Sclerotherapy for rectal varices using an approach for puncture of the superior rectal vein with a small-bore sheathed needle via the greater sciatic foramen was technically feasible and clinically effective.