Frontal infusion system for intravenous burrs
First Claim
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1. A frontal infusion system for treating a blood vessel lesion comprising:
- a burr having a distal end and a proximate end, the burr being moveable through a blood vessel containing a lesion for ablating the lesion;
a conduit connected to the burr to carry a quantity of infusion liquid thereto, the burr having one or more first passages extending at least partly in a proximate direction for expelling infusion liquid at least partly toward the proximate end portion of the burr;
one or more second passages for conveying infusion liquid and constructed and arranged relatively to expel such infusion liquid beyond the distal end of the burr, the first passages and the second passages being constructed and arranged relatively such that more infusion fluid is expelled through the first passages than through the second passages; and
an aspiration sheath having an aspiration mouth opening adjacent to the burr for aspiration of inflsion liquid expelled from the first passages and from the second passages.
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Abstract
Infusion liquid is expelled distally of an ablation burr for washing a blood vessel lesion being treated by the burr. The infusion liquid can be aspirated in a proximate direction to carry the infusion liquid and loose ablated particles of the lesion away from the treatment area. The infusion liquid can be supplied through one or more passages in the burr, In addition to distally extending passages, the burr can include transverse passages extending at least partly in a proximate direction, with the distally extending and proximately extending passages sized so that only a minor portion of the infusion liquid is expelled distally.
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Citations
15 Claims
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1. A frontal infusion system for treating a blood vessel lesion comprising:
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a burr having a distal end and a proximate end, the burr being moveable through a blood vessel containing a lesion for ablating the lesion;
a conduit connected to the burr to carry a quantity of infusion liquid thereto, the burr having one or more first passages extending at least partly in a proximate direction for expelling infusion liquid at least partly toward the proximate end portion of the burr;
one or more second passages for conveying infusion liquid and constructed and arranged relatively to expel such infusion liquid beyond the distal end of the burr, the first passages and the second passages being constructed and arranged relatively such that more infusion fluid is expelled through the first passages than through the second passages; and
an aspiration sheath having an aspiration mouth opening adjacent to the burr for aspiration of inflsion liquid expelled from the first passages and from the second passages. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A frontal infusion system for use in treating a blood vessel lesion comprising:
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a burr having a distal end and a proximate end, the burr being movable through a blood vessel containing a lesion for ablating the lesion;
a conduit connected to the burr to carry a quantity of infusion liquid thereto, the burr having a plurality of passages for expelling infusion liquid received from the conduit, said passages including at least one first passage extending at an angle in the proximate direction for expelling infusion liquid at least partly in a proximate direction and one or more second passages extending distally for expelling infision liquid from the distal end portion of the burr, the first and second passages being constructed and arranged relatively such that the major portion of the infusion liquid is expelled through the at least one first passage and a minor portion is expelled through the one or more second passages; and
an aspiration sheath having an aspiration mouth opening adjacent to the burr for aspiration of infusion liquid expelled from the first and second passages of the burr. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification