Cleared Traditional

K904222 - VISTA GRAPH POLYSOMNOGRAPHY AMPLIFIER (FDA 510(k) Clearance)

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

K904222 · Telediagnostic Systems, Inc. · Neurology device
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Jan 1991
Decision
127d
Days
Class 2
Risk

K904222 is an FDA 510(k) clearance for the VISTA GRAPH POLYSOMNOGRAPHY AMPLIFIER. Classified as Amplifier, Physiological Signal (product code GWL), Class II - Special Controls.

Submitted by Telediagnostic Systems, Inc. (San Francisco, US). The FDA issued a Cleared decision on January 18, 1991 after a review of 127 days - within the typical 510(k) review window.

This device falls under the Neurology FDA review panel, regulated under 21 CFR 882.1835 - 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. Standard predicate reliance. 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 Telediagnostic Systems, Inc. devices

Submission Details

510(k) Number K904222 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received September 13, 1990
Decision Date January 18, 1991
Days to Decision 127 days
Submission Type Traditional
Review Panel Neurology (NE)
Summary -
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
21d faster than avg
Panel avg: 148d · This submission: 127d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code GWL Amplifier, Physiological Signal
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 882.1835
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 - GWL Amplifier, Physiological Signal

All 52
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