| 摘要 |
An accessory for a syringe having a plunger and a barrel, wherein the accessory comprises a housing and a rack; the housing is configured to be attached to the barrel; the rack is configured to be attached to the plunger; the rack and housing are configured so that, when: (a) the housing is attached to the syringe barrel; (b) the rack is attached to the syringe plunger; and (c) a user advances the plunger into the barrel; then the rack interacts with the housing without substantially impeding the movement of the plunger relative to the barrel, thereby providing feedback to the user, the feedback being indicative of the distance the plunger has traveled relative to the barrel. |
