Jet injector with data logging system for use in compliance and dose monitoring programs

An integral vacuum control and data logging system for a fluid medicament injector having an injector tip, said system comprising:

• an electrical power source;
• a vacuum pump for producing a suction at the injector tip;
• at least one switch mounted on said injector for changing state during an injection procedure;
• and
• an electrical circuit for selectively passing a current from said power source to said vacuum pump and for establishing the time at which said switch changes states during the injection procedure, said time for use in a compliance monitoring program;
• wherein said at least one switch comprises a first switch for arming the injector, a second switch for changing state in response to the firing of the injector and a third switch for changing state upon the completion of an injection and wherein said electrical circuit is configured to pass current from said power source to said vacuum pump in response to a state change of said first switch and stop current flow to said vacuum in response to a state change of said third switch.

A system for preventing injections from an injector having a tip when the injector tip is not in contact with a surface, said system for use in a compliance monitoring program, said system comprising:

• a safety mounted on said injector, said safety being reconfigurable between a first configuration wherein said injector is prevented from firing and a second configuration wherein said injector is armed;
• a vacuum pump for establishing a vacuum at the injector tip to hold the injector tip against the surface during an injection;
• a sensor for determining whether a predetermined vacuum level is present at the injector tip indicating that the injector tip is in contact with the surface;
• and
• a means responsive to said sensor for reconfiguring said safety to arm said injector when said predetermined vacuum level is present at the injector tip;
• wherein said sensor measures a vacuum level to determine whether said predetermined vacuum level is present at the injector tip.

A system for preventing injections from an injector having a tip when the injector tip is not in contact with a surface, said system for use in a compliance monitoring program, said system comprising:

• a safety mounted on said injector, said safety being reconfigurable between a first configuration wherein said injector is prevented from firing and a second configuration wherein said injector is armed;
• a vacuum pump for establishing a vacuum at the injector tip to hold the injector tip against the surface during an injection;
• a sensor for determining whether a predetermined vacuum level is present at the injector tip indicating that the injector tip is in contact with the surface;
• and
• a means responsive to said sensor for reconfiguring said safety to arm said injector when said predetermined vacuum level is present at the injector tip;
• wherein said sensor measures a motor current of said vacuum pump to determine whether said predetermined vacuum level is present at the injector tip.