APPARATUS FOR DELIVERING FILAMENTARY MATERIAL INTO A PATIENT

摘要

There are disclosed various dispensing mechanisms for dispensing filamentary material through a catheter into a treatment site of a patient, for example into an aneurysm sack in a patient's vessel. In one embodiment, the dispensing assembly includes a chamber having a spherical carrier onto which filamentary material is wound. Upon injecting driving fluid into the dispensing assembly filamentary material unwinds from the spherical carrier and is pulled through the catheter to be dispensed from the distal end of the catheter. The apparatus includes a pressure sensitive valve disposed at the inlet or the outlet of the receptacle, the pressure sensitive valve being closed when the pressure of driving fluid is below a threshold and open when the pressure of driving fluid is above the threshold. The pressure sensitive valve, when open, allows fluid flow through the chamber and dispensation of filamentary material from the outlet.

主权项

1. Apparatus for delivering filamentary material into a patient, including a tubular delivery element having a proximal end, a distal end and a lumen extending within the tubular delivery element from the proximal to the distal ends; a receptacle provided with an internal chamber for holding the filamentary material, an inlet for receiving driving fluid into the chamber, an outlet through which the filamentary material can pass from the chamber, the outlet being coupled to the proximal end of the tubular delivery element; and a pressure sensitive valve disposed at the inlet or the outlet of the receptacle, the pressure sensitive valve being closed when pressure of the driving fluid is below a threshold and open when the pressure of the driving fluid is above the threshold, the pressure sensitive valve when open allowing fluid flow through the chamber and dispensation of the filamentary material from the outlet.