Cleared Traditional

K841871 - LIQUA-SONIC GEL

K841871 is an FDA 510(k) clearance for LIQUA-SONIC GEL, manufactured by Chester Labs, Inc.. The device is a Class 2 Neurology device with product code GYB cleared through the Traditional 510(k) pathway after a 311-day FDA review.

K841871 · Chester Labs, Inc. · Neurology device
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Mar 1985
Decision
311d
Days
Class 2
Risk

K841871 is an FDA 510(k) clearance for the LIQUA-SONIC GEL. Classified as Media, Electroconductive (product code GYB), Class II - Special Controls.

Submitted by Chester Labs, Inc. (Erlanger, US). The FDA issued a Cleared decision on March 14, 1985 after a review of 311 days - an unusually long review period, suggesting complex equivalence evaluation.

This device falls under the Neurology FDA review panel, regulated under 21 CFR 882.1275 - the FDA neurology 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. Elevated predicate reliance profile. This clearance follows a standard predicate-based equivalence path within the Neurology review framework, consistent with the majority of Class II 510(k) submissions.

View all Chester Labs, Inc. devices

FDA 510(k) Submission Details - K841871

510(k) Number K841871 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received May 07, 1984
Decision Date March 14, 1985
Days to Decision 311 days
Submission Type Traditional
Review Panel Neurology (NE)
Summary -
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
163d slower than avg
Panel avg: 148d · This submission: 311d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

GYB Device Classification - Class 2, Special Controls

Product Code GYB Media, Electroconductive
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 882.1275
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 Neurology devices follow this clearance model.

Regulatory Peers - GYB Media, Electroconductive

All 37
Devices cleared under the same product code (GYB) and FDA review panel - the closest regulatory comparables to K841871.
SKIN PURE
K862799 · Nihon Kohden America, Inc. · Nov 1986
ELEFIX ELECTRODE CREAM
K860210 · Nihon Kohden America, Inc. · Jul 1986
CONTACT CONDUCTIVE ADHESIVE GEL COMPOSITION
K852956 · Parker Laboratories, Inc. · Aug 1985
ECG & ULTRASOUND GELS, CREAMS & LOTION
K803151 · Abco Dealers, Inc. · Dec 1980
SPECTRA R PAD
K791013 · Parker Laboratories, Inc. · Sep 1979
MEDI-TRACE EEG CREME
K790818 · Graphic Controls Corp. · Jun 1979