# Ion Endoluminal System revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Model: [Ion Endoluminal System](/models/intuitive-ion.md)

## Recorded posture

- First recorded event: 2019-02-20
- Last material change: 2019-02-20
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2019-02-20**: created (source: https://isrg.intuitive.com/news-releases/news-release-details/u-s-fda-grants-clearance-ion-intuitive/) (verified)

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date. To restate a recorded change, write a new event through the updateEntityField chokepoint.

_Canonical URL: /models/intuitive-ion/history. REST: /v1/models/0e2f5d6f-8ce6-4726-9301-d438ecf732bc/history. HTML: [/models/intuitive-ion/history](/models/intuitive-ion/history)._