Adapter unit for use in sampling fluid specimens

摘要

An adapter unit, or apparatus for the receipt and containment of a fluid specimen sample under sub-atmospheric or supra-atmospheric pressure. The device is useful in facilitating the transfer of the fluid specimen to a fluid injector device, or needle syringe. In one form, the device is comprised of a valved, closed container the wall of which is fitted with oppositely disposed tubular seals within which is contained a reciprocable plunger. In another form, the device is constituted as an adapter unit which can be adjoined with a valved container for taking a sample therefrom, and subsequently separated therefrom, as desired. In either form, a yoke-like member or C-shaped frame is provided as an overall and necessary part of the combination. One end of the C-shaped frame is secured to a side of the reciprocable plunger, and the other end thereof is provided with a guide or holder. The fluid injector device or syringe can be placed within the holder, and held, such that the needle portion thereof can, in an initial positioning, be partially inserted into the axial opening of a seal adjacent to an end of the reciprocable plunger of the closed container which also lies therein, such that movement of the C-frame will shift the plunger and holder in unison. By such action, the plunger will be moved from the axial opening of the seal and its presence replaced by the needle portion of the fluid injector or syringe. The dispensing end of the needle by such action will be advanced and immersed within the fluid specimen within the container. A fluid specimen can thus be withdrawn at container pressure, locked and stored within the fluid injector device, or syringe, for subsequent injection.