P1vital Products Limited

P1vital® PReDicT Test

User Centred Design
Research and design of a digital medical device

‘The P1vital® PReDicT Test’ is a breakthrough medical device to manage the treatment of depression. The web-based software can detect whether an antidepressant treatment is working for a patient within 7 days compared to the existing 4-6 weeks. This has the potential to significantly improve patient outcomes, reduce healthcare costs and reduce the wider costs to the economy.

As a Class I medical device P1vital had more considerations for their system design than a standard consumer focused website. PDR was tasked with using a user-centred system design approach to understand how the stakeholders will engage with the system and how the system fit into both NHS and patient workflows.

Two phases of research were conducted.  The first phase, foundation research, consisted of a workshop with P1vital staff and a series of interviews with GPs.  This helped PDR to uncover the requirements of the system and build an initial Product Specification. Using the specification gathered in the foundation research, PDR set to work on developing a prototype of the system. An open dialogue of feedback with the client throughout the process ensured that PDR maintained vision of the whole system and not simply the digital element.

The browser-based prototype facilitated the second stage of research - a formative usability study with the intended patient population. PDR recruited a variety of participants spanning a large age range, with a variation in digital literacy and all with experience of depression. As with all medical devices any deviation in intended use could cause major issues and so ensuring that the participants understood and navigated the system as PDR had intended was a top priority.

Confident that the system was fit for purpose, the final stage of the project was to implement changes identified by the user testing and create a handover file for the client to pass to their software team.

This handover file included:

  • Documentation of all research (in line with the requirements of BS EN 62366)

  • A browser-based prototype of the digital element of the system

  • A system map detailing all user flows

  • A guideline document describing the system and detailing all the ‘need to knows’ to scale the design upwards as the product develops.

The team at PDR is excited to see the system in action. It’s always great to work on products that make such a significant difference to the quality of their users' lives.

Contact Us

Alistair Ruff User Centred Design Lead
Jarred Evans Managing Director