Multi-compartment syringe

A syringe device comprising:

• a syringe body having an opening at each of its top and bottom ends;
• a shoulder provided between the top and the bottom ends defining a top-compartment sidewall portion between the top end and the shoulder;
• at least one middle ridge located between the shoulder and the bottom end defining a middle-compartment sidewall portion between the shoulder and the middle ridge, and a bottom-compartment sidewall portion between the middle ridge and the bottom end;
• the top-compartment sidewall portion, the middle-compartment sidewall portion and the bottom-compartment sidewall portion having successively larger diameters;
• a plunger having a shaft, a distal end, a proximal end, and a plunger head provided at the distal end;
• the plunger inserted into the syringe body plunger head first through the bottom end opening;
• the plunger head configured and adapted to form a slidable hermetic seal when the plunger head engages the top-compartment sidewall,
• wherein the plunger is axially translatable between a first position where the plunger head is sealingly engaged with the top-compartment sidewall defining a top compartment between the top end and the plunger head, and a second position where the plunger head is disengaged from the top-compartment sidewall;
• at least two bungs, each having a central aperture in which the plunger shaft is slidably disposed, wherein one of the at least two bungs is a terminal bung positioned on the plunger shaft between the plunger head and the proximal end for sealingly engaging the bottom end opening of the syringe body, and the other of the at least two bungs is an intermediate bung positioned on the plunger shaft between the plunger head and the terminal bung;
• the intermediate bung slidable along the plunger shaft between a sealed position sealingly engaging the at least one middle ridge, providing a partition between the middle compartment and the bottom compartment, and an unsealed position where the middle compartment and the bottom compartment is in flow communication;
• the terminal bung slidable along the plunger shaft between a sealed position sealing the bottom-end opening, and an unsealed position;
• and
• the plunger axially translatable between the first position and the second position without dislodging the terminal bung from its sealed position, and a flow communication is established among the compartments when the plunger is in the second position.