Microperfusion needle or fistula needle with protective element

A microperfusion needle or fistula needle with a protective element, comprising:

• a first component which comprises:
• a cannula having a tip allowing insertion thereof into a vein of a patient, and
• a body rigidly joined to said cannula, the body having substantially opposed lateral grasping wings extending therefrom;
• a second component which comprises:
• an elongate body having a cavity for slidably receiving the first component between an operating position in which said cannula projects out of said cavity at a distal first end of the elongate body and a safety position in which said cannula is entirely held within said cavity, said elongate body having lateral slots for said grasping wings to extend therethrough, said grasping wings being configured to elastically bend around and contact opposed portions defined on the elongate body, and;
• two arrays of projections being positioned on said opposed portions of the elongate body, each of said two arrays of projections comprising individual projections, wherein each of the individual projections, of said two arrays of projections, being located proximal to said distal first end of the elongate body such that each and every individual projection abut said grasping wings only when the first component is in the operating position, and
• wherein the two arrays of projections are configured to contact and mechanically interfere with said grasping wings when the first component is in the operating position with the grasping wings bent, such that when the cannula is pushed proximally towards the elongate body, proximal movement of the grasping wings is hindered relative to the elongate body, such that relative proximal sliding movement between the first component and the second component is prevented, and
• when the grasping wings are undeformed, the first component is allowed to slide proximally from the operating position to the safety position,
• wherein said two arrays of projections are unable to contact and unable to mechanically interfere with the grasping wings when the first component is in the safety position.