# K903603: Ultramark 9 Ultrasound System (UM 9)

- Pathway: 510(k) (Traditional)
- Applicant: Advanced Technology Laboratories, Inc.
- Decided: Feb 26, 1991 after 202 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.
111 later devices descend from it; 2 cite it directly.
2 of 112 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
- K992505: Teratech, Model 2000 Imaging Imaging (1999), 109 descendants of its own
- K070907: Interson Usb Ultrasound Probe System (2007), 106 descendants of its own
- K102153: Mobius Ultrasound Imaging System (2011), 103 descendants of its own
- K133833: Nuvis Diagnostic Ultrasound System (2014), 87 descendants of its own
- K152899: Philips Lumify Diagnostic Ultrasound System (2015), 79 descendants of its own

Source page: https://510kreport.com/device/K903603
Methodology: https://510kreport.com/methodology