| 主权项 |
1. An accessory for a syringe having a plunger and a barrel, the accessory comprising:
a housing configured to removably attach to the barrel, the housing including a holder and a base removably attached to the holder along a first direction, wherein the holder and the base define a housing channel that is elongate through the housing along a second direction, the second direction being substantially perpendicular to the first direction; and a rack configured to removably attach to the plunger, at least a portion of the rack and the plunger being moveably disposed within the housing channel, the rack further configured to intermittently contact the housing as the plunger is pressed into the barrel, wherein a number of intermittent contacts between the housing and the rack is providing a feedback indicative of a distance the plunger has traveled relative to the barrel. |
