Cleared Traditional

FRESENIUS POLYSULFONE DIALYZERS (K921134) - FDA 510(k) Clearance

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

K921134 · Fresenius USA, Inc. · Gastroenterology & Urology device
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Dec 1993
Decision
632d
Days
Class 2
Risk

K921134 is an FDA 510(k) clearance for the FRESENIUS POLYSULFONE DIALYZERS. Classified as Dialyzer, High Permeability With Or Without Sealed Dialysate System (product code KDI), Class II - Special Controls.

Submitted by Fresenius USA, Inc. (Walnut Creek, US). The FDA issued a Cleared decision on December 2, 1993 after a review of 632 days - an unusually long review period, suggesting complex equivalence evaluation.

This device falls under the Gastroenterology & Urology FDA review panel, regulated under 21 CFR 876.5860 - the FDA gastroenterology and urology 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: High-complexity regulatory submission. Elevated predicate reliance profile. The extended review timeline suggests the FDA required additional documentation before confirming substantial equivalence - a pattern common in complex or first-of-kind Gastroenterology & Urology submissions.

View all Fresenius USA, Inc. devices

Submission Details

510(k) Number K921134 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received March 10, 1992
Decision Date December 02, 1993
Days to Decision 632 days
Submission Type Traditional
Review Panel Gastroenterology & Urology (GU)
Summary Statement
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
502d slower than avg
Panel avg: 130d · This submission: 632d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code KDI Dialyzer, High Permeability With Or Without Sealed Dialysate System
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 876.5860
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 Gastroenterology & Urology devices follow this clearance model.

Regulatory Peers - KDI Dialyzer, High Permeability With Or Without Sealed Dialysate System

All 78
Devices cleared under the same product code (KDI) and FDA review panel - the closest regulatory comparables to K921134.
BENTLEY QUICK-PRIME HEMOCONCENTRATOR WITH DURAFLO TREATMENT
K963203 · Baxter Healthcare Corp · Mar 1997
CAHP HIGH PERFORMANCE CELLULOSE DIACETATE HOLLOW FIBER DIALYZER
K950522 · Baxter Healthcare Corp · Apr 1995
BAXTER CT DIALYZER
K926568 · Baxter Healthcare Corp · Sep 1994
INPERSOL CAPD BIOCAP ADMINISTRATION SET
K911094 · Abbott Laboratories · Apr 1991
CAPILLARY FLOW DIALYZERS MODELS CT110G & CT190G
K890315 · Baxter Healthcare Corp · Feb 1989
HIGH EFFICIENCY HEMODIALYSIS SYSTEM
K861776 · Travenol Laboratories, S.A. · Jun 1986