Abstract: A syringe includes a barrel having a fluid chamber, a proximal end, a distal end and an elongated tip extending from the distal end and having a passageway therethrough in fluid communication with the chamber. A collar surrounds the tip and includes at least one deflectable locking tab projecting radially inwardly from the collar. The locking tab is adapted to engage the hub of a needle assembly to prevent removal of a needle assembly away from the tip. The locking tab is configured to allow the assembly of the needle assembly to the barrel through axial motion of the hub toward the barrel. A plunger is provided for drawing fluid into and out of the barrel. The plunger includes an elongated plunger rod having a proximal portion and a distal portion connected by a breakable connection. The breakable connection is strong enough to hold the proximal portion and distal portion together during normal use of the syringe and breakable upon application of additional force to the proximal portion.

Abstract: A syringe assembly includes a barrel having a chamber for retaining fluid. The barrel has an open proximal end, a distal end and an elongated tip extending from the distal end having a passageway therethrough in fluid communication with the chamber. The tip has a diameter at its distal end of less than about 3.8 mm and a side wall tapered proximally outwardly at a taper of from 4% to 8%. A plunger rod includes an elongated body portion having a proximal end, a distal end and a stopper at the distal end. The stopper is slidably positioned in fluid-tight engagement in the barrel. An elongated projection extending distally from the distal end of the plunger rod is shaped to fit within the passageway of the elongated tip. Structure is provided for preventing proximal motion of the plunger rod with respect to the barrel after distal motion of the stopper to expel fluid through the passageway.

Abstract: A syringe includes a barrel having a fluid chamber, a proximal end, a distal end and an elongated tip extending from the distal end and having a passageway therethrough in fluid communication with the chamber. A collar surrounds the tip and includes at least one deflectable locking tab projecting radially inwardly from the collar. The locking tab is adapted to engage the hub of a needle assembly to prevent removal of a needle assembly away from the tip. The locking tab is configured to allow the assembly of the needle assembly to the barrel through axial motion of the hub toward the barrel. A plunger is provided for drawing fluid into and out of the barrel. The plunger includes an elongated plunger rod having a proximal portion and a distal portion connected by a breakable connection. The breakable connection is strong enough to hold the proximal portion and distal portion together during normal use of the syringe and breakable upon application of additional force to the proximal portion.

Abstract: A syringe includes a barrel having a fluid chamber, a proximal end, a distal end and an elongated tip extending from the distal end and having a passageway therethrough in fluid communication with the chamber. A collar surrounds the tip and includes at least one deflectable locking tab projecting radially inwardly from the collar. The locking tab is adapted to engage the hub of a needle assembly to prevent removal of a needle assembly away from the tip. The locking tab is configured to allow the assembly of the needle assembly to the barrel through axial motion of the hub toward the barrel. A plunger is provided for drawing fluid into and out of the barrel. The plunger includes an elongated plunger rod having a proximal portion and a distal portion connected by a breakable connection. The breakable connection is strong enough to hold the proximal portion and distal portion together during normal use of the syringe and breakable upon application of additional force to the proximal portion.

Abstract: A syringe includes a barrel having a fluid chamber, a proximal end, a distal end and an elongated tip extending from the distal end and having a passageway therethrough in fluid communication with the chamber. A collar surrounds the tip and includes at least one deflectable locking tab projecting radially inwardly from the collar. The locking tab is adapted to engage the hub of a needle assembly to prevent removal of a needle assembly away from the tip. The locking tab is configured to allow the assembly of the needle assembly to the barrel through axial motion of the hub toward the barrel. A plunger is provided for drawing fluid into and out of the barrel. The plunger includes an elongated plunger rod having a proximal portion and a distal portion connected by a breakable connection. The breakable connection is strong enough to hold the proximal portion and distal portion together during normal use of the syringe and breakable upon application of additional force to the proximal portion.

Abstract: A syringe assembly comprises a barrel having an inside surface describing a chamber for retaining fluid. The barrel includes an open proximal end and a distal end with an elongated tip extending therefrom having a passageway therethrough in fluid communication with the chamber. A plunger rod includes an elongated body portion having a proximal end, a distal end and a stopper at the distal end. The stopper is slidably positioned in fluid-tight engagement within the barrel. An elongated projection extends distally outwardly from the distal end of the plunger rod. The elongated projection is shaped to fit within the passageway of elongated tip. Structure is provided to prevent the removal of a needle assembly from the elongated tip of the syringe barrel. A locking element is provided to prevent the proximal motion of the plunger rod with respect to the barrel after initial distal motion of the stopper to expel fluid from the syringe barrel.