Department of Radiology, Thammasat University Hospital, Pathum Thani, Thailand.
Department of Radiology, Seoul National University Hospital, Seoul, South Korea.
Diagn Interv Radiol. 2020 Sep;26(5):456-463. doi: 10.5152/dir.2020.19314.
We aimed to evaluate and compare the shapeability and stability of five microcatheters commonly used in interventional radiology after steam shaping and manual shaping.
Steam shaping was performed using three mandrels of different angles: L(S) shape (90°), U(S) shape (180°), and O(S) shape (360°). Three manual shapes-L(M), U(M), and O(M)-were made to have a similar angle to their steam-shaped counterparts. The stability of the microcatheters was evaluated by passing them through a 5 F catheter and inserting microguidewires. The tip angles of the microcatheters and the angle change rates were compared between groups.
The mean angle of the microcatheters after steam shaping was 42.4°-54.1° for L(S) shape, 80.2°-96.7° for U(S) shape, and 130.7°-150.8° for O(S) shape. Five microcatheters showed significantly different mean angle reductions after passing through the 5 F catheter (17.4%-30.3%) and inserting microguidewires (24.1%-61.2%). Different microguidewires also caused significantly different mean angle reductions (34.6%-50.8%). The reduced angle caused by the guidewire was almost completely recovered after withdrawing it (93.2%-101.6%). Although manual-shaped microcatheters showed a 4.2%-6.3% greater angle reduction than steam-shaped microcatheters after passing through the 5 F catheter, the final tip angle was not significantly different between the two groups and was within 10%.
The tip angle of the microcatheters after steam shaping using mandrels may differ depending on the shape of the mandrel and the type of microcatheter used, and the stability varies depending on the type of microcatheter. The manual shaping of microcatheters can be a good alternative to steam shaping.
我们旨在评估和比较五种介入放射学中常用的微导管在蒸汽成型和手动成型后的可成型性和稳定性。
使用三种不同角度的芯棒进行蒸汽成型：L（S）形（90°）、U（S）形（180°）和 O（S）形（360°）。制作三个手动形状-L（M）、U（M）和 O（M）-以使其与对应的蒸汽形状具有相似的角度。通过穿过 5 F 导管和插入微导丝来评估微导管的稳定性。比较各组微导管的尖端角度和角度变化率。
蒸汽成型后微导管的平均角度为 L（S）形 42.4°-54.1°，U（S）形 80.2°-96.7°，O（S）形 130.7°-150.8°。五种微导管在穿过 5 F 导管（17.4%-30.3%）和插入微导丝（24.1%-61.2%）后，平均角度明显减小。不同的微导丝也导致了明显不同的平均角度减小（34.6%-50.8%）。在取出导丝后，导丝引起的减小角度几乎完全恢复（93.2%-101.6%）。尽管手动成型的微导管在穿过 5 F 导管后比蒸汽成型的微导管平均角度减小了 4.2%-6.3%，但两组之间的最终尖端角度没有显著差异，均在 10%以内。
使用芯棒进行蒸汽成型后微导管的尖端角度可能取决于芯棒的形状和微导管的类型，稳定性取决于微导管的类型。微导管的手动成型可以作为蒸汽成型的良好替代方法。
