Effectiveness of single detachable COOK coils in closure of the patent ductus arteriosus.

Objective: To assess the efficacy and safety of single detachable coils in the closure of PDAs. Methods: Review of cases in which a single detachable coil was implanted. The diameter of the ampulla was used to select coilsize. Diameters of the PDA, ampulla and residual shunts were measured. Results: There were 36 patients with a mean minimal ductal diameter of 2.2 ′ 0.6 mm. Immediately after implantation, 46% of the patients had residual shunts and after 24 hours, only 28%. A final spontaneous closure rate of 94% was observed after 21 months. There was a significant (p 2 mm and a residual shunt, more coils may be considered.