Cleared Traditional

K252628 - CASSIE (FDA 510(k) Clearance)

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

K252628 · Wesper, Inc. · Anesthesiology device
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Apr 2026
Decision
250d
Days
Class 2
Risk

K252628 is an FDA 510(k) clearance for the CASSIE. Classified as Ventilatory Effort Recorder (product code MNR), Class II - Special Controls.

Submitted by Wesper, Inc. (Long Island City, US). The FDA issued a Cleared decision on April 27, 2026 after a review of 250 days - an extended review cycle.

This device falls under the Anesthesiology FDA review panel, regulated under 21 CFR 868.2375 - the FDA anesthesiology and respiratory 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 Anesthesiology review framework, consistent with the majority of Class II 510(k) submissions.

View all Wesper, Inc. devices

Submission Details

510(k) Number K252628 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received August 20, 2025
Decision Date April 27, 2026
Days to Decision 250 days
Submission Type Traditional
Review Panel Anesthesiology (AN)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Combination Product No
PCCP Authorized No
Regulatory Context
Review time vs. panel average
111d slower than avg
Panel avg: 139d · This submission: 250d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code MNR Ventilatory Effort Recorder
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 868.2375
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 Anesthesiology devices follow this clearance model.

Regulatory Peers - MNR Ventilatory Effort Recorder

All 160
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