Funaro A H, Ring E J, Freiman D B, Oleaga J A, Gordon R L
AJR Am J Roentgenol. 1979 Dec;133(6):1123-5. doi: 10.2214/ajr.133.6.1123.
Coronary veins in seven of eight patients with bleeding esophageal varices were successfully catheterized and embolized with Gelfoam followed by multiple steel coils. Bleeding immediately ceased in all seven, but recurred within 1 month in six. One had not rebled on 3 month follow-up. Therefore, steel coils do not prevent recurrent bleeding any more effectively than other embolic materials used for this purpose.
8例食管静脉曲张破裂出血患者中，有7例的冠状静脉成功插管，并先用明胶海绵栓塞，随后用多个钢圈栓塞。7例患者的出血均立即停止，但6例在1个月内复发。1例在3个月随访时未再出血。因此，钢圈在预防复发性出血方面并不比用于此目的的其他栓塞材料更有效。
