Safety I. V. injector

Claim 1

An I.V. injector having a cylindrical barrel open at one end and closed at the other end by sealing means, a cannula mounted on the closed end outwardly of the sealing means, a plunger slidably carried in the open end of the barrel, a chamber formed in the barrel between the plunger and the sealing means, said chamber being adapted to receive a high concentrate I.V. medicament, and means at the closed end of the barrel to prevent the presentation of the cannula at an included angle between the cannula and the patient's blood vessel of less than 45°, thus preventing proper intravenous injection of the aforesaid medicament into a patient by causing the user to become aware that the usual intravenous injection procedure cannot be followed thereby inducing the user to check the injector, said means comprising spacer means mounted on the closed end of the barrel and extending perpendicularly outward from the longitudinal axis of the barrel a distance whereby the included angle between the cannula and the patient's blood vessel upon presentation of the cannula for injection will be at least 45° thereby making an intravenous injection impractical due to the steep angle of entry.