A sterile dual-purpose closed intermittent urinary catheter system that may be used as either a drain line or a collection bag. A catheter resides within an inner cavity of an extensible sheath and may be extracted from a forward end through a hub for insertion into the urethra. A valve at a rearward end of the sheath may be opened to permit the sheath to function as a drain line, or closed to permit the sheath to function as a collection bag. The sheath has an extended length substantially longer than the catheter length. The catheter is extracted from within the sheath and inserted into the urethra to start urine flow. The urine may be collected in the sheath with the valve closed, or drained straight into a toilet with the valve open. The hub may have a source of lubrication to wet the catheter as it passes through.
