# K211991: Catalyst R1 Reverse Shoulder System

- Pathway: 510(k) (Special)
- Applicant: Catalyst Orthoscience, Inc.
- Decided: Jul 28, 2021 after 30 days
- Product code: PHX (Shoulder Prosthesis, Reverse Configuration)
- Device class: 2
- Regulation: 21 CFR 888.3660
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 18 generations back to K911686 (1991). 175 ancestors in all.
3 later devices descend from it; 2 cite it directly.
1 of 179 devices in its family (counting itself) has a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K202611: Catalyst OrthoScience R1 Reverse Shoulder System, Catalyst Orthoscience, Inc. (2021) Summary page 4.

## Most influential descendants
- K232583: Catalyst R1 Reverse Shoulder System (2023), 1 descendant of its own
- K234105: Catalyst F1x Shoulder System (2024), 0 descendants of its own
- K223655: Catalyst R1 Reverse Shoulder System (2023), 0 descendants of its own

## Indications for use
The Catalyst RI Reverse Shoulder System is a reverse total shoulder replacement for patients with a functional deltoid muscle and a grossly deficient rotator cuffjoint suffering from pain and dysfunction due to: • Severe arthropathy with a grossly deficient rotator cuff; • Previously failed joint replacement with a grossly deficient rotator cuff; • Fracture of glenohumeral joint from trauma or pathologic conditions of the shoulder including humeral head fracture, displaced 3- or 4-part fractures of proximal humerus, or reconstruction after tumor resection; • Bone defect in proximal humerus; • Non-inflammatory degenerative disease including osteoarthritis and avascular necrosis of the natural humeral head and/ or glenoid; • Inflammatory arthritis including rheumatoid arthritis; • Correction of functional deformity The humeral stems are intended for cemented or uncemented applications. The glenoid baseplate is intended for uncemented use with the addition of screws for fixation.

Source page: https://510kreport.com/device/K211991
Methodology: https://510kreport.com/methodology