ADJUSTABLE VASCULAR RING, MEANS FOR TREATING SFS SYNDROME AND IMPLANTABLE KIT COMPRISING SUCH A RING, MOULD AND METHOD FOR OBTAINING SUCH A RING

摘要

The invention relates to a perivascular ring having an inner diameter adjustable by inflation/deflation and adapted to be implanted and closed about a vessel for controlling the inner diameter of said vessel and thus the flow and/or pressure of a fluid flowing in said vessel. The ring of the invention is capable of regulating blood flow to the liver, in particular after an hepatectomy or hepatic transplant, and to substantially improve the survival chances of the patient. The ring according the invention has an adjustable inner diameter (φi) for implantation and locking about a vessel.

主权项

1. Ring with an adjustable inner diameter, intended to be implanted and closed around a biological duct, preferably a vessel, in order to control the diameter of this duct and thus the flow rate and/or pressure of a fluid circulating in the duct, this ring comprising:
an outer belt with a constant diameter in the closed position; an inner chamber that can be inflated and deflated in the closed position, so as to vary its inner diameter; a flexible inflation/deflation tube one end of which is connected to the inner chamber and the other end of which is intended to be connected to inflation means;the outer belt and the inner chamber forming open collars, at least one of which, preferably that forming the outer belt is equipped with means for closing the ring around the duct;wherein the inner chamber, at rest and in the closed position, has an inner diameter corresponding to the smallest reduced diameter required when in use for controlling the diameter of the duct.