INTRODUCER INCLUDING SHAPED DISTAL REGION
First Claim
1. An introducer for introducing a medical device into a vasculature of a patient, comprising:
- a sheath defining a proximal end, an open distal end, and a central bore extending therebetween, a distal region of the sheath including at least one curved outer surface portion proximally extending from the distal end thereof, a cross section of the at least one curved outer surface portion at least partially defined by a first radius; and
a dilator that is removably received within the central bore of the sheath such that at least a portion of a distal tapered region of the dilator extends distally of the distal end of the sheath.
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Accused Products
Abstract
An introducer for providing intravascular access to a patient is disclosed, and includes a dilator and sheath that are configured to prevent peelback, or “fishmouthing,” of the sheath during introducer advancement. In one embodiment, the introducer comprises a dilator including a distal tapered region, and a sheath including an inner bore that receives the dilator such that a portion of the tapered region of the dilator extends from the sheath distal end. A distal outer surface of the sheath includes a first curved portion defined by a first radius and extending proximally from the distal end of the sheath to a first end point, and a second curved portion defined by a second radius and extending proximally from the first end point to a second end point. Additionally, an interference fit is established between the dilator tapered region and the sheath distal end to further prevent sheath end deformation.
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Citations
27 Claims
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1. An introducer for introducing a medical device into a vasculature of a patient, comprising:
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a sheath defining a proximal end, an open distal end, and a central bore extending therebetween, a distal region of the sheath including at least one curved outer surface portion proximally extending from the distal end thereof, a cross section of the at least one curved outer surface portion at least partially defined by a first radius; and a dilator that is removably received within the central bore of the sheath such that at least a portion of a distal tapered region of the dilator extends distally of the distal end of the sheath. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A sheath assembly for use with an introducer in introducing a medical device into a vasculature of a patient, comprising:
a sheath defining a proximal end, an open distal end, and a central bore extending therebetween, a distal region of an outer surface of the sheath including; a first curved portion defined in cross section by a first radius and extending proximally from the sheath distal end to a first endpoint; and a second curved portion defined in cross section by a second radius and extending proximally of the first endpoint to a second endpoint. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An introducer for introducing a medical device into a vasculature of a patient, the introducer comprising:
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a dilator including a distal tapered region; and a sheath including an inner bore extending between a proximal and a distal end thereof for removably receiving the dilator therein such that at least a portion of the distal tapered region of the dilator distally extends from the distal end of the sheath, an outer surface of the sheath including; a first curved portion cross sectionally defined by a first radius and extending proximally from the distal end of the sheath to a first end point; and a second curved portion cross sectionally defined by a second radius and extending proximally from the first end point to a second end point. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification