Releasably locking dilator and sheath assembly
First Claim
1. A dilator and sheath assembly comprising:
- a) a dilator having;
1) an elongated dilator stem having a proximal dilator end; and
2) a dilator hub fixedly connected to the proximal dilator end, wherein the dilator hub includes a threaded portion at a distal portion thereof; and
b) a sheath having;
1) an elongated tubular portion having a proximal sheath end, a distal sheath end, and a longitudinal axis extending between the proximal sheath end and the distal sheath end, wherein the tubular portion is sized to frictionally retain the dilator stem;
2) at least one tear seam extending in a plane between the proximal sheath end and the distal sheath end; and
3) a sheath hub fixedly connected to the proximal sheath end, wherein the sheath hub includes a proximal portion and a mating threaded portion at a proximal end thereof, wherein the threaded portion of the dilator hub and the mating threaded portion of the sheath hub provide a releasably locking engagement between the dilator and the sheath.
1 Assignment
0 Petitions
Accused Products
Abstract
A releasably locking dilator and sheath assembly and methods for releasing the dilator from the sheath and longitudinally splitting the sheath are provided. The assembly includes a dilator having a dilator hub and a sheath having a sheath hub. The sheath hub has two opposing winged tabs, each tab having a perpendicular portion and an angled portion as well as a female threaded portion. The dilator hub has a male threaded portion designed to engage the female threaded portion of the sheath hub. The dilator is released from the sheath by rotating the dilator 90° in relation to the sheath and pulling the dilator out of the sheath. The sheath is longitudinally split by creating a couple on each of the winged tabs thereby forcing the sheath and the sheath hub to split longitudinally. With the sheath and sheath hub split longitudinally, the sheath is removed from around a catheter while leaving the catheter in place.
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Citations
18 Claims
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1. A dilator and sheath assembly comprising:
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a) a dilator having;
1) an elongated dilator stem having a proximal dilator end; and
2) a dilator hub fixedly connected to the proximal dilator end, wherein the dilator hub includes a threaded portion at a distal portion thereof; and
b) a sheath having;
1) an elongated tubular portion having a proximal sheath end, a distal sheath end, and a longitudinal axis extending between the proximal sheath end and the distal sheath end, wherein the tubular portion is sized to frictionally retain the dilator stem;
2) at least one tear seam extending in a plane between the proximal sheath end and the distal sheath end; and
3) a sheath hub fixedly connected to the proximal sheath end, wherein the sheath hub includes a proximal portion and a mating threaded portion at a proximal end thereof, wherein the threaded portion of the dilator hub and the mating threaded portion of the sheath hub provide a releasably locking engagement between the dilator and the sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A dilator and sheath assembly comprising:
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a) a dilator having;
1) an elongated dilator stem having a proximal dilator end; and
2) a dilator hub fixedly connected to the proximal dilator end;
b) a sheath having;
1) an elongated tubular portion having a longitudinal axis, a proximal sheath end and a distal sheath end, wherein the tubular portion is sized to frictionally retain the dilator stem;
2) at least one tear seam extending in a plane between the proximal sheath end and the distal sheath end; and
3) a sheath hub fixedly connected to the proximal sheath end; and
c) a means for providing a releasably locking engagement between the distal portion of the dilator hub and the proximate portion of the sheath hub. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A dilator and sheath assembly comprising:
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a) a dilator having an elongated dilator stem, a proximal dilator end and a dilator hub fixedly connected to the proximal dilator end, wherein the dilator hub includes a threaded portion at a distal portion thereof; and
b) a sheath having;
(i) a proximal sheath end, a distal sheath end and an elongated tubular portion having a longitudinal axis extending between the proximal sheath end and the distal sheath end;
(ii) two tear seams extending along the tubular portion between the proximal sheath end and the distal sheath end, wherein the two tear seams are located on opposite sides of the sheath and are in a plane containing the longitudinal axis of the sheath; and
(iii) a first and second opposing sheath hub portions, wherein each of the first and second sheath hub portions comprise an inverted semicircular edge fixedly connected to the sheath, whereby the first and second sheath hub portions generally encircle the tubular sheath and whereby there are small spaces between the first and second sheath hub portions, wherein the spaces between the first and second sheath hub portions are aligned with the two tear seams on the sheath;
wherein each of the first and second sheath hub portions comprise a threaded portion at a proximal end thereof, whereby the first and second threaded portions form a circular threaded portion forming the proximal end of the sheath, and whereby the threaded portion is matable with the threaded portion of the dilator hub to provide a releasably locking engagement between the dilator and the sheath.- View Dependent Claims (15, 16, 17, 18)
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Specification