# K100252: Master-VU a-Scan, MV4500

- Pathway: 510(k) (Traditional)
- Applicant: Sonomed, Inc.
- Decided: Apr 9, 2010 after 71 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
Longest line of descent: 2 generations back to K843696 (1985). 3 ancestors in all.
No later device cites it as a predicate yet.
0 of 4 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K040668: E-Z Scan AB5500+, Sonomed, Inc. (2004) Summary page 2.

## Indications for use
The Master-Vu A-Scan provides intraocular measurements of anterior chamber depth, lens thickness, and axial length which can be used with published industry-accepted refractive formulas to calculate associated IOL powers for implanted lenses.

Source page: https://510kreport.com/device/K100252
Methodology: https://510kreport.com/methodology