Vacuum pressure syringe assembly with locking feature

A syringe assembly comprising:

• a syringe barrel having a side wall with an inside surface defining a chamber configured to retain and expel a fluid, an open proximal end having a pair of gripping flanges and pair of connecting flanges extending radially from the open proximal end and a distal end including a distal wall having a passageway therethrough in fluid communication with the chamber;
• and
• an elongate plunger rod disposed within the syringe barrel, the elongate plunger rod comprising a distal end and a proximal end, the distal end including a stopper, the elongate plunger rod including a plurality of plunger rod locking slots located between the distal end and the proximal end, and the elongate plunger rod extendible to a plurality of different locked lengths using a locking element mounted to the proximal end of the syringe barrel to engage the plurality of plunger rod locking slots to permit varying amounts of fluid to be aspirated into the syringe barrel without rotating the elongate plunger rod.