# K924311: Sonomed 4000P Ultrasonic Pachymeter

- Pathway: 510(k) (Traditional)
- Applicant: Sonomed, Inc.
- Decided: Dec 8, 1992 after 104 days
- Product code: IYO (System, Imaging, Pulsed Echo, Ultrasonic)
- Device class: 2
- Regulation: 21 CFR 892.1560
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
8 later devices descend from it; 1 cites it directly.
0 of 9 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
- K993674: Pocket Ultrasonic Pachymeter (2000), 7 descendants of its own
- K094038: Compact Touch (2010), 3 descendants of its own
- K180265: COMPACT TOUCH Ophthalmic Ultrasound System (2018), 1 descendant of its own
- K232302: Pocket III (2024), 0 descendants of its own
- K213254: Axialis Ophthalmic Ultrasound System (2021), 0 descendants of its own

Source page: https://510kreport.com/device/K924311
Methodology: https://510kreport.com/methodology