| 摘要 |
A stylet has a proximal end a distal end and an outer surface. The stylet is substantially cylindrical. The outer surface of the stylet is treated, or roughened, preferably by a glass peening or a bead blasting operation, such that its maximum profile peak height is greater than 30 mum, its roughness average is greater than 5 mum, and its root mean square roughness is greater than 8 mum. This results in reducing the removal force of the treated stylet from a silicone catheter.
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