A predicate device is an existing previously cleared 510k Certification and is marketed under a regulatory pathway that is used for the comparison between the proposed device to prove the substantial equivalent.

- It should have a similar product code, regulation number, and intended use as same as the newlyproposed device.
- It should have the same technical characteristics as the proposed device.
- It should have the same design and material as the newly proposed device.
- It should have the same safety and effectiveness as the newly proposed device.

- Same intended use and same technological characteristics as legally marketed device
- Have different characteristics but it does not raise any questions about its safety and effectiveness
- Identify predicate device for the newly proposed device
- Compare both the device
- Check if both the device has similar intended use and characteristics
- If both are similar, then it is substantially equivalent
- If it has different technological characteristics, then sufficient testing is required
- Check if the data taken from testing passes the acceptance criteria
- If both are similar, then it is substantially equivalence

PREDICATE DEVICE | SUBSTANTIAL EQUIVALENCE |
| It is a legally marketed device | It is a method to find the SE of the proposed device |
| It is used to find if the newly proposed device is safe and effective by comparing with the predicate device. | Comparison method between predicate device and proposed device to find the substantial equivalence. |






