# K854212: Acoustascope Esophageal Stethoscope W/Temp Sensor

- Pathway: 510(k) (Traditional)
- Applicant: Respiratory Support Products, Inc.
- Decided: Jan 3, 1986 after 78 days
- Product code: BZT (Stethoscope, Esophageal, With Electrical Conductors)
- Device class: 2
- Regulation: 21 CFR 868.1920
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
2 later devices descend from it; 1 cites it directly.
0 of 3 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K111050: Esophageal / Rectal Temperature Probe, 9FR, 12FR, Esophageal Stethoscope with Temperature Sensor, 9FR, 12FR, 18FR, 24FR (2012), 1 descendant of its own
- K140134: Esophageal Stethoscope with Temperature Sensor (Non-Sterile),Esophageal Stethoscope Temperature with Attached Ear Piece (2014), 0 descendants of its own

Source page: https://510kreport.com/device/K854212
Methodology: https://510kreport.com/methodology