Abstract: The invention relates to an access device comprising: a base (1) for aligning the access device with the skin of a patient; a needle for puncturing the skin, the needle comprising a hub (2) and a cannula (10), and the needle being movably mounted in the base (1) such that it can move between a first, fully retracted, and a second, maximally extended, position; and a locking mechanism which engages when the needle retracts from the second position and reaches a discrete third position, inhibiting the needle from further retracting to the first position. According to the invention, the access device is actuatable to disengage the locking mechanism.

Abstract: An attachment (1, 1a) for or on a device (100) for injecting a fluid into or under the skin (200), which is for example suitable for injecting botulinum toxin into facial muscles of a human patient, comprises: a proximal part (2, 2a) which is couplable or is connected to the device (100) and which bears a cannula (3). A distal part (4, 4a) surrounds the cannula (3) at least in places and is rotationally mobile relative to the proximal part (2, 2a) and vice versa, such that an extent (d3) by which the cannula projects out from the distal part (2, 2a) is modifiable. A discrete number of stopping positions is provided with regard to the rotational movement, which correspond to a different extent by which the cannula (3) projects out from the distal part (2, 2a).

Abstract: The invention relates to an access device comprising: a base (1) for aligning the access device with the skin of a patient; a needle for puncturing the skin, the needle comprising a hub (2) and a cannula (10), and the needle being movably mounted in the base (1) such that it can move between a first, fully retracted, and a second, maximally extended, position; and a locking mechanism which engages when the needle retracts from the second position and reaches a discrete third position, inhibiting the needle from further retracting to the first position. According to the invention, the access device is actuatable to disengage the locking mechanism.