Recanalization apparatus and devices for use therein and method
First Claim
1. A recanalization apparatus for use in crossing a stenosis forming a total occlusion in a lumen in a vessel formed by a vessel wall, the stenosis having a fibrous cap, comprising a guiding sheath comprised of a flexible elongate tubular member having proximal and distal extremities and having a lumen extending from the proximal extremity to the distal extremity, hemostasis valve means mounted on the proximal extremity of the flexible elongate tubular member, a needle cannula slidably mounted in the lumen of the guiding sheath, said needle cannula having proximal and distal extremities and having a lumen extending from the proximal extremity to the distal extremity and a sharpened tip mounted on the distal extremity, said needle cannula having a length so that its proximal extremity extends beyond the proximal extremity of the guiding sheath when the sharpened tip is deployed beyond the distal extremity of the guiding sheath.
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Accused Products
Abstract
Recanalization apparatus for crossing a stenosis forming a total occlusion in a lumen in a vessel formed by a vessel wall. The stenosis has a fibrous cap comprising a guiding sheath comprised of a flexible elongate tubular member having proximal and distal extremities. A lumen extends from the proximal extremity to the distal extremity. A hemostasis valve is mounted on the proximal extremity of the flexible elongate tubular member. A needle cannula is slidably mounted in the lumen of the guiding sheath and has proximal and distal extremities and has a lumen extending from the proximal extremity to the distal extremity. A sharpened tip is mounted on the distal extremity. The needle cannula has a length so that its proximal extremity extends beyond the proximal extremity of the guiding sheath when the sharpened tip is deployed beyond the distal extremity of the guiding sheath.
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Citations
19 Claims
- 1. A recanalization apparatus for use in crossing a stenosis forming a total occlusion in a lumen in a vessel formed by a vessel wall, the stenosis having a fibrous cap, comprising a guiding sheath comprised of a flexible elongate tubular member having proximal and distal extremities and having a lumen extending from the proximal extremity to the distal extremity, hemostasis valve means mounted on the proximal extremity of the flexible elongate tubular member, a needle cannula slidably mounted in the lumen of the guiding sheath, said needle cannula having proximal and distal extremities and having a lumen extending from the proximal extremity to the distal extremity and a sharpened tip mounted on the distal extremity, said needle cannula having a length so that its proximal extremity extends beyond the proximal extremity of the guiding sheath when the sharpened tip is deployed beyond the distal extremity of the guiding sheath.
- 13. A method for crossing a stenosis forming a total occlusion in a lumen in a vessel formed by a vessel wall, the lesion having proximal and distal fibrous caps by the use of a guiding sheath having proximal and distal extremities and having a lumen extending from the proximal extremity to the distal extremity comprising introducing the guiding sheath into the vessel and advancing it in the vessel until the distal extremity is in close proximity to a fibrous cap of the lesion and extends in a direction substantially perpendicular thereto, introducing a needle cannula through the lumen of the guiding sheath and advancing the needle cannula through the fibrous cap and through the lesion and thereafter advancing the guiding sheath over the needle cannula until it penetrates the fibrous cap and the lesion to cross the lesion.
Specification