A Medical Device

A device for introducing a medicament into a patient, the device comprising:

• a cannula having an inlet end for the medicament and a discharge end for the medicament;
• and
• a passageway having an inlet opening that is proximal to or level with the discharge end of the cannula,
• wherein, in use, when the device is accidently positioned in the patient with the discharge end of the cannula and the inlet opening of the passageway penetrating a blood vein there is a flow of blood from the vein through the inlet opening of the passageway and into the passageway that provides a visual indication that the discharge end of the cannula is in the vein,
• wherein the passageway is annular in transverse section,
• wherein the cannula and the annular passageway are coaxial, and
• wherein the annular passageway is in the form of an annular tube that fits over the cannula.