Cleared Traditional

K953981 - SYNTHASIL APTT REAGENT (FDA 510(k) Clearance)

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

K953981 · Ortho Diagnostic Systems, Inc. · Hematology device
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Nov 1995
Decision
99d
Days
Class 2
Risk

K953981 is an FDA 510(k) clearance for the SYNTHASIL APTT REAGENT. Classified as Activated Partial Thromboplastin (product code GFO), Class II - Special Controls.

Submitted by Ortho Diagnostic Systems, Inc. (Raritan, US). The FDA issued a Cleared decision on November 30, 1995 after a review of 99 days - within the typical 510(k) review window.

This device falls under the Hematology FDA review panel, regulated under 21 CFR 864.7925 - the FDA hematology device framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Standard predicate-based submission. Standard predicate reliance. This clearance follows a standard predicate-based equivalence path within the Hematology review framework, consistent with the majority of Class II 510(k) submissions.

View all Ortho Diagnostic Systems, Inc. devices

Submission Details

510(k) Number K953981 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received August 23, 1995
Decision Date November 30, 1995
Days to Decision 99 days
Submission Type Traditional
Review Panel Hematology (HE)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
14d faster than avg
Panel avg: 113d · This submission: 99d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code GFO Activated Partial Thromboplastin
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 864.7925
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 Hematology devices follow this clearance model.