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Stretched minimal diameter of the ductus and coil occlusion
Author(s) -
Tomita Hideshi,
Fuse Shigeto,
Chiba Shunzo
Publication year - 1998
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/j.1442-200x.1998.tb01967.x
Subject(s) - ductus arteriosus , medicine , electromagnetic coil , loop (graph theory) , anatomy , surgery , mathematics , combinatorics , physics , quantum mechanics
Background:Stretching of the ductus was supposed to determine the size mismatch of the coil with the ductus in coil occlusion that results in residual leak or migration.Methods:We measured the minimal diameter (D) and the stretched minimal diameter (S) of the ductus in 12 patients with patent ductus arteriosus (PDA). The stretch index (SI) was calculated as S divided by D. We calculated ratios of the loop diameter of the first implanted coil to D (C,/D) and S (C/S) and those of the sum of all the loop diameters of all implanted coils for complete closure to D (total C/D) and to S (total CIS).Results:Stretched minimal diameter divided by D was 1.8 ± 0.3. Ratios of the loop diameter of the first implanted coil to D (C 1 /D), and S (C 1 /S) were 3.7 ± 1.8 and 2.1 ± 0.9, respectively. Ratios of the sum of all the loop diameters of all coils to D (total C/D) and S (total C/S) were 5.2 ± 1.6 and 2.9 ± 0.9, respectively. Standard deviations of C 1 /S and total C/S are significantly smaller than those of C 1 /D and total C/D, respectively.Conclusions:The narrowest segment of the ductus could be stretched to twice the size of the minimal diameter. The stretched minimal diameter may be a more reliable parameter to select the loop diameter of coils than the angiographic minimal diameter.