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What Is Substantial Equivalence (SE) in FDA 510(k)? Definition & Criteria
In 510(k) , substantial equivalence (SE)  means your device has the same intended use  as a predicate  and either the same tech...
Jul 46 min read


What Is an RTA Hold? FDA 510(k) Acceptance Review (2025 Guide)
An RTA hold  happens when a 510(k)  fails FDA’s acceptance review  and is not accepted  for substantive review; you then have 180 days...
Jul 46 min read


What Is FDA's eSTAR? Electronic Submission Template Guide 2025
eSTAR  is FDA’s interactive PDF template that structures medical-device submissions in the same layout reviewers use, with built-in...
Jul 37 min read


What Is an FDA Pre-Submission (Q-Sub)? Complete 2025 Guide
An FDA Pre-Submission (Q-Sub)  is a voluntary  way to get FDA feedback—by written response and/or a meeting—before or during an IDE,...
Jul 28 min read


Humanitarian Device Exemption (HDE): 2025 FDA Guide
An HDE  is a marketing application for a Humanitarian Use Device (HUD) —a device intended to treat/diagnose a condition that affects or...
Jul 17 min read


What Is an IDE? FDA Investigational Device Exemption Guide 2025
An Investigational Device Exemption (IDE)  lets an unapproved  or new-use  device be used in a U.S. clinical study to collect...
Jun 266 min read
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