Bio-medical injector apparatus

A bio-medical injector apparatus comprising a base unit, carriage means reciprocally secured to the base unit, hypodermic needle means removably secured to the carriage means and movable simultaneously therewith, solenoid means carried by the base unit and operably connected with the carriage means for simultaneous reciprocation of the carriage means and hypodermic needle means, motor drive means carried by the carriage means and operably connected with hypodermic needle means for injection of the contents of the hypodermic needle means during an injection procedure, power means operably connected with solenoid means and motor drive means for supplying electrical power thereto, and electronic circuitry means including sensor means for detecting the presence of blood on the hypodermic needle means, said electronic circuitry means being interposed between the power supply means and the solenoid means and motor drive means for providing the logic required to perform the operation of the injector apparatus to stop the operation of the hypodermic needle upon detection of blood.