Importance

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Abstract

Disclosed herein are expandable introducer sheaths and methods of making and using the same. The sheaths minimize trauma to a patient's vasculature by allowing for temporary expansion of a portion of the sheath state after passage of the device. The sheath includes a rolled inner member having a detachable flap structure at its distal tip that facilitates expansion of the sheath lumen to increase diameters. Also, the flap structure reduces the number of layers at the tip, lowering push forces. An elastomeric free end of the tip helps reduce push and retrieval forces for balloons and implants. The expandable sheath includes an elastic outer layer that compresses the inner member and flap back into the rolled, compressed condition after the passage of the device.

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First Claim