Telescoping Dilator Sheaths
Also called Byrd Dilator Sheaths, non-powered dilator sheaths
Non-powered sheaths that telescope over each other and are slightly larger than the pacing lead. They are made of Teflon, plastic or metal; one series used polypropylene (Byrd Dilator Sheaths, SightRail).
Primary uses
What this instrument is on the table to do.
Transvenous lead extraction. When traction with a standard or locking stylet fails, the sheaths are passed over the lead to free it from scar. When the long sheath reaches the lead tip, it pushes against the heart wall (countertraction) while the locking stylet pulls the lead tip.
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