Transseptal needle apparatus
First Claim
1. An apparatus comprising:
- a needle assembly including;
an outer cannula including a tubular sidewall disposed around a lumen, at least a portion of the sidewall including an exterior including a polymeric material configured to inhibit skiving of an interior of a dilator with movement of the outer cannula within the dilator;
an inner cannula disposed within the lumen and selectively slidable with respect to the outer cannula, the inner cannula including a distal end including a sharpened tip, wherein the sharpened tip of the inner cannula remains disposed within the outer cannula during insertion of the needle assembly within the dilator to protect the interior of the dilator from the sharpened tip and inhibit skiving of the interior of the dilator by the sharpened tip; and
an outer cannula cover extending distally from the outer cannula to cover over and completely close off a distal opening of the outer cannula and to shield the sharpened tip of the inner cannula to further guard against skiving of the interior of the dilator by the sharpened tip, wherein the outer cannula cover includes a frangible distal end, such that a non-resealable opening is formed in the outer cannula cover with extension of the sharpened tip of the inner cannula through the outer cannula cover; and
a handle disposed at a proximal portion of the needle assembly, the handle including;
a first handle portion coupled to and movable with the outer cannula; and
a second handle portion coupled to and movable with the inner cannula, wherein the first handle portion is selectively movable with respect to the second handle portion to extend the sharpened tip of the inner cannula outwardly from within the lumen of the outer cannula.
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Accused Products
Abstract
In various examples, an apparatus includes a needle assembly including an outer cannula including a tubular sidewall disposed around a lumen. At least a portion of the sidewall includes an exterior including a polymeric material configured to inhibit skiving of an interior of a dilator with movement of the outer cannula within the dilator. An inner cannula is disposed within the lumen and is selectively slidable with respect to the outer cannula. A handle is disposed at a proximal portion of the needle assembly. The handle includes a first handle portion coupled to and movable with the outer cannula. A second handle portion is coupled to and movable with the inner cannula, wherein the first handle portion is selectively movable with respect to the second handle portion to extend a distal end of the inner cannula from within the lumen of the outer cannula.
66 Citations
22 Claims
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1. An apparatus comprising:
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a needle assembly including; an outer cannula including a tubular sidewall disposed around a lumen, at least a portion of the sidewall including an exterior including a polymeric material configured to inhibit skiving of an interior of a dilator with movement of the outer cannula within the dilator; an inner cannula disposed within the lumen and selectively slidable with respect to the outer cannula, the inner cannula including a distal end including a sharpened tip, wherein the sharpened tip of the inner cannula remains disposed within the outer cannula during insertion of the needle assembly within the dilator to protect the interior of the dilator from the sharpened tip and inhibit skiving of the interior of the dilator by the sharpened tip; and an outer cannula cover extending distally from the outer cannula to cover over and completely close off a distal opening of the outer cannula and to shield the sharpened tip of the inner cannula to further guard against skiving of the interior of the dilator by the sharpened tip, wherein the outer cannula cover includes a frangible distal end, such that a non-resealable opening is formed in the outer cannula cover with extension of the sharpened tip of the inner cannula through the outer cannula cover; and a handle disposed at a proximal portion of the needle assembly, the handle including; a first handle portion coupled to and movable with the outer cannula; and a second handle portion coupled to and movable with the inner cannula, wherein the first handle portion is selectively movable with respect to the second handle portion to extend the sharpened tip of the inner cannula outwardly from within the lumen of the outer cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
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a needle assembly including; an outer cannula including a tubular sidewall disposed around a lumen, at least a portion of the sidewall including an exterior including a polymeric material configured to inhibit skiving of an interior of a dilator with movement of the outer cannula within the dilator; an inner cannula disposed within the lumen and selectively slidable with respect to the outer cannula, the inner cannula including a distal end including a sharpened tip, wherein the sharpened tip of the inner cannula remains disposed within the outer cannula during insertion of the needle assembly within the dilator to protect the interior of the dilator from the sharpened tip and inhibit skiving of the interior of the dilator by the sharpened tip; and an outer cannula cover extending distally from the outer cannula to cover over and completely close off a distal opening of the outer cannula and to shield the sharpened tip of the inner cannula to further guard against skiving of the interior of the dilator by the sharpened tip, wherein the outer cannula cover includes a frangible distal end, such that a non-resealable opening is formed in the outer cannula cover with extension of the sharpened tip of the inner cannula through the outer cannula cover; a handle disposed at a proximal portion of the needle assembly, the handle including; a first handle portion coupled to and movable with the outer cannula; and a second handle portion coupled to and movable with the inner cannula, wherein the first handle portion is selectively movable with respect to the second handle portion to extend the sharpened tip of the inner cannula outwardly from within the lumen of the outer cannula, wherein the outer cannula cover is puncturable by the sharpened tip of the inner cannula with extension of the distal end of the inner cannula from within the lumen and out of the distal opening of the outer cannula; and a handle lock including a first position in which the handle lock inhibits movement of the second handle portion with respect to the first handle portion and a second position in which the handle lock allows movement of the second handle portion with respect to the first handle portion. - View Dependent Claims (19, 20, 21, 22)
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Specification