| 主权项 |
1. A system of devices for treating an artery, comprising:
an arterial access sheath adapted to introduce an interventional catheter into an artery, the arterial access sheath including a sheath body sized and shaped to be introduced into a common carotid artery via a carotid artery access site, the sheath body defining an internal lumen that provides a passageway for introducing a catheter into the common carotid artery when the sheath body is positioned in the common carotid artery, wherein the sheath body has a proximal section and a distalmost section that is more flexible than the proximal section, and wherein a ratio of an entire length of the distalmost section to an overall length of the sheath body is one tenth to one half the overall length of the sheath body; a tubular, proximal extension having an internal lumen and being connected to a proximal-most end of the sheath body, the proximal extension having a hemostasis valve that provides access to the internal lumen of the proximal extension, wherein the internal lumen of the proximal extension fluidly communicates with the internal lumen of the sheath body when the proximal extension is connected to the sheath body, wherein the proximal extension has an inner diameter and an outer diameter that is larger than an inner diameter and an outer diameter, respectively, of the sheath body so as to form a step between the sheath body and the proximal extension; an elongated dilator positionable within the internal lumen of the sheath body, wherein the arterial access sheath and the dilator can be collectively introduced into the common carotid artery; and a first catheter formed of an elongated catheter body having an internal lumen and sized and shaped to be introduced via a carotid artery access site into a common carotid artery through the internal lumen of the arterial access sheath, the catheter body sized and shaped to be navigated distally to an intracranial artery through the common carotid artery via the access location in the carotid artery, wherein the catheter body has a length of 40 cm to 70 cm, and wherein the catheter body has a proximal most section and a distal most section wherein the proximal most section is a stiffest portion of the catheter body, and wherein the catheter body has an overall length and a distal most section length such that the distal most section can be positioned in an intracranial artery and at least a portion of the proximal most section is positioned in the common carotid artery during use; a second catheter having a tubular distal region that fits co-axially into the internal lumen of the first catheter, the tubular distal region having an outer seal that seals with the internal lumen of the first catheter, the second catheter further having a proximal tether wire attached to the tubular distal region and extending in a proximal direction from the tubular distal region, the tether wire being be of sufficient rigidity to push the catheter without buckling. |
