Exostructure to assist in accurate syringe injection

A method for delivering one or more individual units of a medicament, the method comprising:

• a) delivering the one or more individual units of the medicament from a syringe when a plunger bar is depressed in a first direction;
• b) preventing the plunger bar from being retracted in a second direction opposite the first direction with a locking pawl assembly engaging the plunger bar,
• wherein the locking pawl assembly comprises a locking pawl and a yoke integrally connected to the locking pawl by a living hinge,
• wherein the yoke is configured to at least partially surround the plunger bar,
• wherein the locking pawl assembly produces tactile feedback, audible feedback, or both tactile and audible feedback in response to movement of the plunger bar in the first direction,
• wherein an exostructure encases the locking pawl assembly, and
• wherein an interior of the exostructure comprises a slot for receiving a flange of the syringe.

A method for delivering one or more individual units of a medicament, the method comprising:

• a) depressing a plunger bar in a first direction to deliver the one or more individual units of the medicament from a syringe;
• b) wherein, as the plunger bar is depressed, a locking pawl assembly engages the plunger bar to prevent the plunger bar from being retracted in a second direction opposite the first direction,
• wherein the locking pawl assembly comprises a locking pawl and a yoke integrally connected to the locking pawl by a living hinge,
• wherein the yoke is configured to at least partially surround the plunger bar,
• wherein the locking pawl assembly produces tactile feedback, audible feedback, or both in response to movement of the plunger bar in the first direction,
• wherein an exostructure encases the locking pawl assembly, and
• wherein an interior of the exostructure comprises a slot for receiving a flange of the syringe.