Summary "Mark-Indexed Syringe" The present invention relates to a finger holder (1) arranged to be connected to a syringe barrel having a plunger and a plunger rod for driving said plunger. the finger support comprises a body having a lower side with finger support surfaces (13) for supporting a user's fingers during handling and a locking member (5) which is movable between an inactive position in which the member The coupling member is arranged not to engage the syringe barrel piston rod and an active position in which the coupling member is arranged to engage a grooved surface on the syringe plunger rod so that the feedback loop is disposed. provided to a user as the plunger is moved relative to the finger holder. an activation member (7) for moving the engaging member from said inactive position to said active position is embedded in the finger holder.
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