Manual dispensing aid for a syringe

摘要

A releasably attachable manual dispensing aid (20) is operable with a syringe (22) having a syringe body (24) and a syringe plunger (32) that is movable within the syringe body (24). The dispensing aid (20) includes a dispensing aid body (40) that is releasably attachable to the syringe body (24). The dispensing aid (20) further includes a dispensing aid plunger (44) that is attachable to the syringe plunger (32), and has a slide (46) that is slidable within the dispensing aid body (40). An electronic linear position measuring device (52) has a first portion (54) fixed to the dispensing aid body (40) and a second portion (56) fixed to the dispensing aid plunger (44). Optionally, the dispensing aid (20) includes a microprocessor (78) that receives as inputs a calibration value for a particular syringe and the position signal, and determines as an output signal the true volume of liquid displaced by the syringe plunger movement.