Devices descending from K143270
6 later devices reach Optima XR646 through their predicates, nearest generation first.
| Generation | Number | Device | Applicant | Decided | Own descendants | Recalls |
|---|---|---|---|---|---|---|
| +1 | K172869 | Discovery XR656 HD | Ge Hualun Medical Systems Co., Ltd. | 2017 | 5 | 1 |
| +2 | K231892 | Definium Pace Select | Ge Hualun Medical Systems Co., Ltd. | 2023 | 1 | 1 |
| +2 | K191699 | Discovery XR656 HD with VolumeRad | Ge Hualun Medical Systems Co., Ltd. | 2019 | 1 | 3 |
| +2 | K173612 | Optima XR646 HD | Ge Hualun Medical Systems Co., Ltd. | 2017 | 0 | 1 |
| +3 | K250788 | Definium Tempo Select | Ge Hualun Medical Systems Co., Ltd. | 2025 | 0 | — |
| +3 | K242678 | Definium Pace Select ET | Ge Hualun Medical Systems Co., Ltd. | 2024 | 0 | — |