Understanding IRB Requirements for Usability Studies Involving Medical Devices

When conducting usability studies, particularly those involving medical devices, one critical question researchers and developers face is: Do we need IRB approval? The answer directly impacts your timeline, budget, and regulatory compliance, and often hinges on whether the study qualifies as human subjects research under federal regulations. If you're unsure where your study falls, our Study Operations team can help determine your IRB requirements and manage the submission process so your timeline stays on track.

What is IRB Review and Why Does It Matter?

An Institutional Review Board (IRB) is an oversight committee that reviews research involving human participants to ensure their rights and welfare are protected. Federal regulations require IRB approval for research that involves human subjects and aims to contribute to generalizable knowledge. Operating without required IRB approval can result in regulatory action, invalidated data, and significant project delays. Consider partnering with IRB experts to navigate this complex process efficiently.

When Does a Usability Study Qualify as Human Subjects Research?

Defining Human Subjects Research Under 45 CFR 46

According to 45 CFR 46, human subjects research involves:

• Intervention or interaction with living individuals (e.g., usability testing, interviews, observation), or

• Accessing identifiable private information (e.g., health records, user demographics, performance data).

If your usability study involves observing or interacting with participants to gather data on their experience with a medical device, and that data is identifiable or intended to be generalizable, you must obtain IRB review.

What Counts as Generalizable Knowledge?

Research contributes to generalizable knowledge when it:

• Is intended for publication, presentation, or dissemination,

• Aims to influence policy, practice, or design standards,

• Applies findings beyond the immediate setting or group studied.

Critical point: If you're planning to share your usability results externally—including in FDA submissions, marketing materials, or conference presentations—IRB oversight is required.

Additional Requirements for FDA-Regulated Studies

For studies supporting FDA approval of a medical device, IRB review is mandatory, not optional. FDA regulations (21 CFR 50 and 56) unequivocally require IRB approval for clinical investigations involving devices, drugs, or biologics that gather data on safety and effectiveness. Non-compliance can halt your regulatory submission.

When IRB Review May Not Be Required

Not all usability testing meets the threshold for human subjects research. Studies may not require IRB approval when they:

• Involve no human interaction (e.g., bench testing, simulation studies),

• Collect no identifiable data whatsoever, and

• Are purely for internal quality improvement with no intent to generalize.

Important: Even when you believe IRB review isn't required, always document this determination formally with your IRB office to ensure compliance and protect your organization.

Best Practices for IRB Compliance in Usability Studies

• Engage your IRB early: Submit a determination request as soon as you begin planning any human-participant study—not after you've designed protocols.

• Never self-determine exemption: While some minimal-risk usability studies may qualify as exempt, only an IRB can make this official determination.

  • While some minimal-risk usability studies may qualify as exempt, only an IRB can make this official determination. A Regulatory Gap Analysis can help clarify which level of review applies to your study before you finalize your protocol.

• Document everything: Clearly state whether your study aims to generate internal insights only or will inform broader knowledge, regulatory submissions, or public claims.

How ClariMed Can Help

Usability studies are essential for developing safe and effective medical devices, but overlooking ethical and regulatory requirements can derail your project. When in doubt, err on the side of caution: if your study involves any human interaction or could support regulatory approval, engage your IRB early.

From initial determination through final approval, our Human Factors & Usability services integrate ethical oversight directly into study design and execution, so compliance doesn't become a bottleneck. Whether you need help clarifying your IRB requirements, managing the submission process, or planning your study end to end, our team can keep your project on track.

Contact us to discuss how we can support your next medical device usability study.