METHODS OF USING A DUAL-LUMEN SHEATH IN INTRALUMINAL PROCEDURES

摘要

Disclosed are sheaths that comprise a first sheath member having a first passageway, a first length, and a first proximal end defined by a first valve apparatus configured to seal the first passageway, the first passageway having a first passageway diameter at a location in the first passageway; and a second sheath member coupled to the first sheath member, the second sheath member having a second passageway and a second length, the second passageway having a second passageway diameter at a location in the second passageway; where the first passageway and the second passageway are separate from each other and not co-axial, the first length is different from the second length, and the first and second sheath members are positioned beside each other for a portion of their first and second lengths.

主权项

1. A method of navigating a spinal subarchnoid space in a living being, comprising:
percutaneously introducing a device into the spinal subarachnoid space at an entry location, the device having a first passageway sized to slidably receive, and work with, at least a guidewire; and advancing the device within the spinal subarachnoid space at least more than 10 centimeters from the entry location.