Importance

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Abstract

A catheter introducer assembly includes an introducer sheath mounted on a dilator. The distal end of the dilator protrudes beyond the distal end of the sheath and defines an arrowhead having a proximally facing surface that cooperates with the distal end of the sheath to reduce the risk of tissue trauma while facilitating smooth entry into and through tissue. The proximal hubs of the dilator and sheath are configured with respect to the relation between the distal end of the dilator and sheath to provide smooth controlled withdrawal of the dilator through the sheath. The sheath is attached, at its proximal end, to a housing with a mechanical connection that does not require the use of adhesives, welding or other bonding techniques. The connection also may incorporate an integral strain relief for the proximal end of the sheath. The housing at the proximal end of the sheath includes a proximal end cap construction that is secure and is easily attached without requiring ultrasonic welding or other bonding techniques. Methods are described for assembling the introducer and for forming the arrowhead portion of the dilator.

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First Claim