Patent ID: 6443979
Filing Date: 2002-09-03
Classification: A61F

Abstract:
A delivery sheath device for use with an interventional device which protects a lesion from abrasion caused by the delivery of the interventional device through the lesion, comprising:an expandable sheath portion having a proximal end and a distal end, with an inner lumen extending therethrough, the sheath portion having a substantial constant low profile diameter to cross the lesion and being expandable against the lesion by the subsequent introduction of an interventional device into the inner lumen to prevent abrasion between the interventional device and the lesion; and a catheter portion having a proximal end and a distal end, with an inner lumen extending therethrough, wherein the distal end of the catheter portion is attached to proximal end of the expandable sheath portion and the inner lumen of the catheter portion is used to deliver the interventional device into the inner lumen of the expandable sheath portion, the inner lumen of the catheter portion being larger than the inner lumen of the expandable sheath portion prior to the introduction of the interventional device into the inner lumen of the expandable sheath.