I saw this article for the first time today. Unlike prior articles I have read, this one has specifics on the start of testing.

https://www.healio.com/news/nephrology/20210511/us-issues-patent-for-wearable-artificial-kidney?fbclid=IwAR3UXlorpcYuHide1jiN2gKCElunqJ7yuyVHNTjn9suV9qE6rK-lc6XGsSE