Cleared Traditional

K791903 - COULTER DIFF3 SYS. (COULTER #7400003)

K791903 is an FDA 510(k) clearance for COULTER DIFF3 SYS. (COULTER #7400003), manufactured by Coulter Electronics, Inc.. The device is a Class 2 Hematology device with product code GKZ cleared through the Traditional 510(k) pathway after a 35-day FDA review.

K791903 · Coulter Electronics, Inc. · Hematology device
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Oct 1979
Decision
35d
Days
Class 2
Risk

K791903 is an FDA 510(k) clearance for the COULTER DIFF3 SYS. (COULTER #7400003). Classified as Counter, Differential Cell (product code GKZ), Class II - Special Controls.

Submitted by Coulter Electronics, Inc. (Mchenry, US). The FDA issued a Cleared decision on October 30, 1979 after a review of 35 days - a notably fast clearance cycle.

This device falls under the Hematology FDA review panel, regulated under 21 CFR 864.5220 - 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 Coulter Electronics, Inc. devices

FDA 510(k) Submission Details - K791903

510(k) Number K791903 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received September 25, 1979
Decision Date October 30, 1979
Days to Decision 35 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
78d faster than avg
Panel avg: 113d · This submission: 35d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

GKZ Device Classification - Class 2, Special Controls

Product Code GKZ Counter, Differential Cell
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 864.5220
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 - GKZ Counter, Differential Cell

All 295
Devices cleared under the same product code (GKZ) and FDA review panel - the closest regulatory comparables to K791903.
ADC-500 AUTOMATED DIFFER. CELL CNTR. SY.
K803219 · Abbott Laboratories · Jan 1981
ADD OF RETICULOCYTE COUNT/CAPABILITIES
K800533 · Abbott Laboratories · Apr 1980
TECHNICON C/90 SYSTEM
K800121 · Technicon Instruments Corp. · Feb 1980
HEMATRAK ABNORMAL RECOGNITION
K791041 · Geometric Data, Div. Smithkline Corp. · Sep 1979
HEMATRAK MODEL 480
K790816 · Geometric Data, Div. Smithkline Corp. · Jul 1979
CONTEXT FILTER
K791108 · Geometric Data, Div. Smithkline Corp. · Jul 1979