Cleared Traditional

K981404 - FUKUDA DENSHI ULTRASOUND SCANNERS MODELS UF-3500 AND UF-4500 (FDA 510(k) Clearance)

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

K981404 · Fukuda Denshi USA, Inc. · Radiology device
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May 1998
Decision
33d
Days
Class 2
Risk

K981404 is an FDA 510(k) clearance for the FUKUDA DENSHI ULTRASOUND SCANNERS MODELS UF-3500 AND UF-4500. Classified as System, Imaging, Pulsed Echo, Ultrasonic (product code IYO), Class II - Special Controls.

Submitted by Fukuda Denshi USA, Inc. (Redmond, US). The FDA issued a Cleared decision on May 20, 1998 after a review of 33 days - a notably fast clearance cycle.

This device falls under the Radiology FDA review panel, regulated under 21 CFR 892.1560 - the FDA radiology and imaging software oversight 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 Fukuda Denshi USA, Inc. devices

Submission Details

510(k) Number K981404 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received April 17, 1998
Decision Date May 20, 1998
Days to Decision 33 days
Submission Type Traditional
Review Panel Radiology (RA)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
74d faster than avg
Panel avg: 107d · This submission: 33d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code IYO System, Imaging, Pulsed Echo, Ultrasonic
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 892.1560
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 Radiology devices follow this clearance model.

Regulatory Peers - IYO System, Imaging, Pulsed Echo, Ultrasonic

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