Patent ID: 7161488

Claim:
A method of identifying, testing or clearing a prefilled medicinal syringe having a coding thereon indicating the medicinal in said syringe before use of the syringe by a patient, said method comprising the steps of sequentially: (a) inserting said syringe into a tubular test device having in an interior thereof a reader for said coding and displacing said syringe relative to said reader rotationally about an axis of the syringe through at least two revolutions, thereby reading any coding on the syringe at least twice; (b) comparing the read coding with stored information; (c) upon a positive or negative correlation of the read coding and the stored information, generating a signal at an indicator on said test device which represents to a user whether or not the contents of the syringe are usable; and (d) printing on the syringe an additional code.