Cleared Traditional

K771728 - AUTO. LEUCOCYTE DIFFER. ANALYZER D/90

K771728 is an FDA 510(k) clearance for AUTO. LEUCOCYTE DIFFER. ANALYZER D/90, manufactured by Technicon Instruments Corp.. The device is a Class 2 Hematology device with product code GKL cleared through the Traditional 510(k) pathway after a 54-day FDA review.

K771728 · Technicon Instruments Corp. · Hematology device
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Nov 1977
Decision
54d
Days
Class 2
Risk

K771728 is an FDA 510(k) clearance for the AUTO. LEUCOCYTE DIFFER. ANALYZER D/90. Classified as Counter, Cell, Automated (particle Counter) (product code GKL), Class II - Special Controls.

Submitted by Technicon Instruments Corp. (Mchenry, US). The FDA issued a Cleared decision on November 7, 1977 after a review of 54 days - a notably fast clearance cycle.

This device falls under the Hematology FDA review panel, regulated under 21 CFR 864.5200 - 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 Technicon Instruments Corp. devices

FDA 510(k) Submission Details - K771728

510(k) Number K771728 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received September 14, 1977
Decision Date November 07, 1977
Days to Decision 54 days
Submission Type Traditional
Review Panel Hematology (HE)
Summary -
Third-party Review No - reviewed directly by FDA
Combination Product No
PCCP Authorized No
Regulatory Context
Review time vs. panel average
59d faster than avg
Panel avg: 113d · This submission: 54d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

GKL Device Classification - Class 2, Special Controls

Product Code GKL Counter, Cell, Automated (particle Counter)
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 864.5200
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.

Regulatory Peers - GKL Counter, Cell, Automated (particle Counter)

All 97
Devices cleared under the same product code (GKL) and FDA review panel - the closest regulatory comparables to K771728.
SYSMEX PLATELET COUNTER, PL-110
K780911 · Toa Medical Electronics USA, Inc. · Jun 1978
MICROCELL COUNTER MODEL CC-108
K780224 · Toa Medical Electronics USA, Inc. · May 1978
COUNTER MODEL S PLUS BLOOD CELL COUNTER
K771512 · Coulter Electronics, Inc. · Nov 1977
DETECTOTERGE AZIDE FREE
K771790 · J.T. Baker Chemical Co. · Oct 1977
PLATELET COUNTER & HEMATOCRIT ACCES.
K771353 · Hycel, Inc. · Aug 1977
COUNTER 700 & HC-700 HEMO 0 REF.
K771107 · Hycel, Inc. · Jul 1977