Disposable slide-step percutaneous transhepatic cholangiography procedure tray

Claim 1

A two-member disposable slide-step roentgenological visualization procedure tray for sequentially performing sterile procedures comprising a one-piece lower tray member and a one-piece upper tray member; (a) said one-piece lower tray member comprising: (1) a lower tray member top surface having a generally rectangular periphery and being generally planar except for a plurality of article supporting recesses formed therein; (2) an integral outer peripheral upwardly extending rim-like retaining means surrounding three sides of said lower tray member top surface, and defining an area for the receiving of said one-piece upper tray member in a position juxtaposed upon said lower tray member top surface; said rim-like retaining means extending upwardly from said lower tray member top surface; (3) an integral, three-sided downwardly depending flange means extending downwardly from the top of said rim-like retaining means down to a generally flat plane below the lowest portion of the deepest or most downwardly extending article supporting recesses to provide a bottom edge serving as an open base for supporting said lower tray member; (4) a plurality of boss means in said rim-like retaining means spaced above said lower tray member top surface to retain said upper tray member in said area defined by said rim-like retaining means while permitting transversely sliding movement of said upper tray member with respect to said top surface of said lower tray member; and (b) said one-piece upper tray member being in a juxtaposed position upon said lower tray member top surface and transversely slideably removeable from said juxtaposed position and comprising: (1) a generally planar, generally rectangular article-supporting upper tray member top surface having a smaller area than said lower tray member top surface; (2) an integral peripheral rim surrounding the periphery of said upper tray member top surface and extending upwardly from said upper tray member top surface, the area defined by said peripheral rim being smaller than the area defined by said rim-like retaining means, whereby said peripheral rim fits within said area defined by said rim-like retaining means in closely spaced relation to said rim-like retaining means; (3) outwardly extending flange means extending outward from said rim to provide a generally peripheral flat planar surface extending outwardly beyond the area of said upper tray member top surface, for positioning below said boss means while said upper tray member is in said juxtaposed position, and for permitting sliding transverse movement of said upper tray member transversely with respect to said lower tray member top surface.