Pulse oximeter that can be directly connected to Luscii
One kind of pulse oximeter can be directly connected to Luscii: the iHealth Air.
Other Pulse Oximeters
Not all hospitals send a pulse oximeter to patients and then it is fine to use your own pulse oximeter.
In this case, you can link your pulse oximeter to the Apple Health app (iOS) or the Google Fit app (Android). Luscii can also load your saturation through these apps.
If you have a pulse oximeter that cannot be paired with bluetooth, you can also enter your measurement manually. You can read in this article how to set up submissions via the Apple Health app (iOS) or the Google Fit app, or manually.