Patent ID: 6796957
Filing Date: 2004-09-28
Classification: A61B,A61M,Y10S

Abstract:
An aspiration/injection system for a bodily liquid containing undesired components, said system comprising the following components:a) a sterile container comprising in liquid-tight arrangement: i) a liquid-tight cylindrical housing with an opening; wherein the interior of the housing is maintained in a sterile condition and has a maximum internal volume in the range of about 3 ml to about 70 ml; ii) a self-sealing puncturable sterile barrier covering the opening for receiving a hollow needle cannula, and iii) a plunger in liquid-tight co-axial connection with the interior of the housing, b) a pressure actuator co-axially coupleable to the plunger of the sterile container so that the pressure actuator exerts a positive pressure on the plunger to expel the liquid from the sterile container in a controlled volume by distal movement of the plunger one or more precisely controlled longitudinal distances; c) a flow-through filter assembly, said filter assembly comprising: i) one or more filters with pores sized to filter out undesired components from the liquid and; ii) a filter receptacle having at least a distal part and a proximal part, which parts engage to cooperatively form a liquid-tight enclosure for the one or more filters; iii) a hollow needle cannula attached to the exterior of the proximal part of the filter receptacle; and iv) a liquid-tight liquid connector attached to the exterior of the distal side of the filter receptacle; e) an aspiration needle with hub for attachment to the fluid connector; and f) a two way diverter; wherein components of the system can be operationally coupled in various fluid-tight combinations.