Cleared Traditional

K840661 - PARAMAX ACID PHOSPHATASE REAGENT (FDA 510(k) Clearance)

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

K840661 · American Dade · Hematology device
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Apr 1984
Decision
49d
Days
Class 2
Risk

K840661 is an FDA 510(k) clearance for the PARAMAX ACID PHOSPHATASE REAGENT. Classified as Acid Phosphatase, Naphthyl Phosphate (product code CKB), Class II - Special Controls.

Submitted by American Dade (Mchenry, US). The FDA issued a Cleared decision on April 4, 1984 after a review of 49 days - a notably fast clearance cycle.

This device falls under the Hematology FDA review panel, regulated under 21 CFR 862.1020 - 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: Fast-track predicate clearance. Standard predicate reliance. The short review cycle indicates strong predicate alignment - the FDA found sufficient equivalence without extended technical review.

View all American Dade devices

Submission Details

510(k) Number K840661 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received February 15, 1984
Decision Date April 04, 1984
Days to Decision 49 days
Submission Type Traditional
Review Panel Hematology (HE)
Summary -
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
64d faster than avg
Panel avg: 113d · This submission: 49d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code CKB Acid Phosphatase, Naphthyl Phosphate
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 862.1020
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.