Cleared Traditional

K033156 - OB1 OBSTETRICAL DOPPLER (FDA 510(k) Clearance)

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

K033156 · D. E. Hokanson, Inc. · Radiology device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Dec 2003
Decision
70d
Days
Class 2
Risk

K033156 is an FDA 510(k) clearance for the OB1 OBSTETRICAL DOPPLER. Classified as Monitor, Ultrasonic, Fetal (product code KNG), Class II - Special Controls.

Submitted by D. E. Hokanson, Inc. (Bellevue, US). The FDA issued a Cleared decision on December 9, 2003 after a review of 70 days - a notably fast clearance cycle.

This device falls under the Radiology FDA review panel, regulated under 21 CFR 884.2660 - 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 D. E. Hokanson, Inc. devices

Submission Details

510(k) Number K033156 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received September 30, 2003
Decision Date December 09, 2003
Days to Decision 70 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
37d faster than avg
Panel avg: 107d · This submission: 70d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code KNG Monitor, Ultrasonic, Fetal
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 884.2660
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 - KNG Monitor, Ultrasonic, Fetal

All 59
Devices cleared under the same product code (KNG) and FDA review panel - the closest regulatory comparables to K033156.
Fetal Doppler U8-25, U9-25
K252669 · Zhongshan Xiaolan Town Senlan Electronic Factory · Jan 2026
Doppler FHR Detector (BF-500D+, BF-560)
K242846 · Shenzhen Bestman Instrument Co., Ltd. · Jun 2025
Ultrasonic Fetal Doppler
K233823 · Shenzhen Jamr Technology Co., Ltd. · Jun 2024
Pocket Fetal Doppler (CONTEC 10D), Pocket Fetal Doppler (CONTEC 10E), Pocket Fetal Doppler (CONTEC 10F)
K232893 · Contec Medical Systems Co.,Ltd · Jun 2024
Pocket Fetal Doppler (Models CONTEC10C and CONTEC10CL)
K220245 · Contec Medical Systems Co.,Ltd · Sep 2022