Device and method for endovascular treatment for causing closure of a blood vessel

摘要

An endovascular laser treatment device for causing closure of a blood vessel uses an optical fiber adapted to be inserted into a blood vessel. An inner sleeve is arranged around a distal portion of the optical fiber core such that both distal ends of the inner sleeve and the optical fiber core form an enlarged light emitting face. The enlarged emitting face provides substantially lower power density while providing the same amount of total energy during a treatment session. An outer sleeve arranged around the inner sleeve acts as a spacer to position the light emitting face away from an inner wall of the blood vessel. The enlarged light emitting face and the outer sleeve acting as a spacer reduces the possibility of thermal run-away and device damage, and reduce the possibility of vessel perforations, leading to less bruising, post-operative pain and other clinical complications.

主权项

1. An endovascular laser treatment device for causing closure of a blood vessel comprising:
an optical fiber adapted to be inserted into a blood vessel and having a core through which a laser light travels, the core having a proximal portion directly surrounded by a first cladding layer and a distal portion disposed distally of the proximal portion and directly surrounded by a second cladding layer that is different than the first cladding layer; an inner sleeve arranged around the distal portion of the core such that distal ends of the inner sleeve and the optical fiber core together form a single enlarged light emitting surface, wherein the inner sleeve is index matched with the core, the first cladding layer positioned proximally of the second cladding layer, the second cladding layer extending proximally from the enlarged light emitting face; and an outer sleeve arranged around the inner sleeve to position the light emitting surface away from an inner wall of the blood vessel.