Syringe systems and methods for multi-stage fluid delivery

A syringe-based apparatus for delivering fluid comprising:

• (a) a housing, the housing having an open proximal end and a distal end defining an inner volume;
• (b) a needle coupled with the distal end of the housing;
• (c) an actuator mechanism, the actuator mechanism being coupled with the housing, the actuator mechanism comprising a syringe body and a plunger, the syringe body and the plunger being insertable into the open proximal end of the housing;
• (d) a medicament reservoir, the medicament reservoir being defined at least partially by the housing and the actuator mechanism;
• and
• (e) a reconstitution fluid reservoir operably configured to retain an amount of a fluid, the reconstitution fluid reservoir being defined at least partially by the syringe body and the plunger of the actuator mechanism;
• wherein the plunger is operably configured to move relative to the syringe body to expel the amount of the fluid from the reconstitution fluid reservoir into the medicament reservoir;
• wherein the actuator mechanism is operably configured to move relative to the housing to expel the amount of the fluid from the medicament reservoir through the needle.

A syringe-based apparatus for delivering fluid comprising:

• (a) a housing, the housing having an open proximal end and a distal end defining an inner volume, wherein the housing defines a viewing window;
• (b) a needle coupled with the distal end of the housing;
• (c) a glass sleeve having a proximal end and a distal end, the glass sleeve being insertable into the open proximal end of the housing into the inner volume of the housing, wherein the glass sleeve comprises a valve at the distal end of the glass sleeve;
• (d) an actuator mechanism, the actuator mechanism being coupled with the housing, the actuator mechanism comprising a syringe body and a plunger, the syringe body and the plunger being insertable into the proximal end of the glass sleeve;
• (e) a locking mechanism, wherein the locking mechanism is operably configured to fixedly couple the plunger and the syringe body when the plunger is urged distally;
• (f) a medicament reservoir, the medicament reservoir being defined at least partially by the glass sleeve positioned within the housing and the actuator mechanism;
• and
• (g) a reconstitution fluid reservoir retaining an amount of a fluid, the reconstitution fluid reservoir being defined at least partially by the syringe body and the plunger of the actuator mechanism;
• wherein the plunger is moveable relative to the syringe body to expel the amount of the fluid from the reconstitution fluid reservoir into the medicament reservoir such that the amount of the fluid and the amount of the medicament form a reconstituted medication;
• wherein the actuator mechanism is moveable relative to the housing to expel the reconstituted medication from the medicament reservoir through the needle.