Systems and methods for facilitating fluid flow during enhanced detection and quantification of analytes

A sample analysis cartridge, comprising:

• a housing including one or more reservoirs and an input tunnel;
• one or more pieces of sealing material fluidly sealing fluid including sample preparation reagents within the one or more reservoirs;
• a seal piercer positioned within the housing and partially disposed within the input tunnel, the seal piercer defining a slot and comprising:
• one or more piercers configured to pierce the one or more pieces of sealing material that seals the one or more reservoirs within the housing;
• and
• an engager coupled to the one or more piercers, the one or more piercers are slidable via the slot in a first direction and a second direction, substantially perpendicular to the first direction, responsive to a force applied on the engager by a sample collection device when the sample collection device is inserted within the input tunnel, from a pre-venting position, wherein the one or more pieces of sealing material has not been pierced, to a venting position, wherein the one or more piercers has pierced the one or more pieces of sealing material to unseal the one or more reservoirs.