# K991756: 3 Channel Knee Electronic Amplified Stethoscope

- Pathway: 510(k) (Traditional)
- Applicant: Bio-Research Associates, Inc.
- Decided: Dec 10, 1999 after 200 days
- Product code: DQD (Stethoscope, Electronic)
- Device class: 2
- Regulation: 21 CFR 870.1875
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
1 later device descends from it; 1 cites it directly.
0 of 2 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. The FDA summary names its predicate without a number.
- (no number) 3M Littmann Electronic Stethoscope: named in the summary without a submission number
- (no number) Transmedica Model 100 Digital Electronic Stethoscope: named in the summary without a submission number

## Most influential descendants
- K252076: Kneevoice Cartilage Evaluation System (750-3600-001) (2026), 0 descendants of its own

## Indications for use
The 3 Channel Knee Electronic Amplified Stethoscope is intended for use by a physician as a noninvasive tool to amplify and record distinct sounds (vibrations) within the three compartments (medial, lateral, and patellar) of the knee joint.

Source page: https://510kreport.com/device/K991756
Methodology: https://510kreport.com/methodology