Back to Journals » Medical Devices: Evidence and Research » Volume 11

Formative usability evaluation of a fixed-dose pen-injector platform device

Authors Lange J, Nemeth T

Received 13 December 2017

Accepted for publication 2 March 2018

Published 4 April 2018 Volume 2018:11 Pages 105—112

DOI https://doi.org/10.2147/MDER.S159733

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Cristina Weinberg

Peer reviewer comments 2

Editor who approved publication: Dr Scott Fraser


Jakob Lange, Tobias Nemeth

Ypsomed AG, Burgdorf, Switzerland

Background: This article for the first time presents a formative usability study of a fixed-dose pen injector platform device used for the subcutaneous delivery of biopharmaceuticals, primarily for self-administration by the patient. The study was conducted with a user population of both naïve and experienced users across a range of ages. The goals of the study were to evaluate whether users could use the devices safely and effectively relying on the instructions for use (IFU) for guidance, as well as to benchmark the device against another similar injector established in the market. Further objectives were to capture any usability issues and obtain participants’ subjective ratings on the properties and performance of both devices.
Methods: A total of 20 participants in three groups studied the IFU and performed simulated injections into an injection pad.
Results: All participants were able to use the device successfully. The device was well appreciated by all users with, maximum usability feedback scores reported by 90% or more on handling forces and device feedback, and by 85% or more on fit and grip of the device. The presence of clear audible and visible feedbacks upon successful loading of a dose and completion of injection was seen to be a significant improvement over the benchmark injector.
Conclusion: The observation that the platform device can be safely and efficiently used by all user groups provides confidence that the device and IFU in their current form will pass future summative testing in specific applications.

Keywords: human-factor engineering, pen injector, handling study, user error, instructions for use, FixPen

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]