Accuracy and performance of a commercially available Dosing Aid.
OBJECTIVE
To evaluate the recently introduced Travatan Dosing Aid (TDA) for its accuracy in recording and dispensing eyedrops.


METHODS
The number of eyedrops dispensed with each lever depression and agreement of total number of drops dispensed with that recorded by the device was evaluated in a controlled setting.


RESULTS
The TDA correctly recorded a drop being dispensed 100% of the time with full TDA lever depression for <3 s. Under these conditions, agreement between numbers of drops dispensed and recorded was 99%. However, failure to fully depress the lever or prolonged lever depression for >4 s resulted in unreliable TDA recording.


CONCLUSIONS
Eyedrops were reliably recorded by the TDA after each full lever depression. However, patients need to be instructed about optimal technique so that evaluation of compliance is not confounded by mechanical factors.
Cronin
Tara H
TH
UPMC Eye Center, University of Pittsburgh, 203 Lothrop Street, Suite 800, Pittsburgh, PA 15213, USA.
Kahook
Malik Y
MY
Lathrop
Kira L
KL
Noecker
Robert J
RJ
D000959:Antihypertensive Agents / Q000008:administration & dosage*; D003008:Cloprostenol / Q000008:administration & dosage / Q000031:analogs & derivatives*; D004334:Drug Administration Schedule; D016503:Drug Delivery Systems / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D009883:Ophthalmic Solutions; D010349:Patient Compliance; D000069557:Travoprost
D000959:Antihypertensive Agents; D009883:Ophthalmic Solutions; D003008:Cloprostenol; D000069557:Travoprost