Cleared Traditional

K811787 - QUANTAPHASE T-4 RIA (FDA 510(k) Clearance)

Class II Chemistry device cleared through predicate-based substantial equivalence - typically does not require clinical trials.

K811787 · Bio-Rad · Chemistry device
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Jul 1981
Decision
17d
Days
Class 2
Risk

K811787 is an FDA 510(k) clearance for the QUANTAPHASE T-4 RIA. Classified as Radioimmunoassay, Total Thyroxine (product code CDX), Class II - Special Controls.

Submitted by Bio-Rad (Mchenry, US). The FDA issued a Cleared decision on July 10, 1981 after a review of 17 days - a notably fast clearance cycle.

This device falls under the Chemistry FDA review panel, regulated under 21 CFR 862.1700 - the FDA in vitro diagnostics and chemistry framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Fast-track predicate clearance. Standard predicate reliance. The short review cycle indicates strong predicate alignment - the FDA found sufficient equivalence without extended technical review.

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Submission Details

510(k) Number K811787 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received June 23, 1981
Decision Date July 10, 1981
Days to Decision 17 days
Submission Type Traditional
Review Panel Chemistry (CH)
Summary -
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
71d faster than avg
Panel avg: 88d · This submission: 17d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code CDX Radioimmunoassay, Total Thyroxine
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 862.1700
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Chemistry devices follow this clearance model.