# K181108: Fresenius Liberty Select Cycler

- Pathway: 510(k) (Special)
- Applicant: Fresenius Medical Care Renal Therapies Group, LLC
- Decided: May 24, 2018 after 27 days
- Product code: FKX (System, Peritoneal, Automatic Delivery)
- Device class: 2
- Regulation: 21 CFR 876.5630
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 6 generations back to K923065 (1994). 8 ancestors in all.
3 later devices descend from it; 3 cite it directly.
0 of 12 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K171652: Fresenius Liberty Select Cycler, Fresenius Medical Care Renal Therapies Group, LLC (2017) Summary page 4.

## Most influential descendants
- K243371: Byonyks X-1 APD Cycler; Byonyks Automated PD Set DS-1 (2025), 0 descendants of its own
- K222318: Fresenius Liberty Select Cycler (2022), 0 descendants of its own
- K212522: Lilliput APD System (2022), 0 descendants of its own

## Indications for use
The Fresenius Liberty Select Cycler is indicated for acute and chronic peritoneal dialysis.

Source page: https://510kreport.com/device/K181108
Methodology: https://510kreport.com/methodology