Darkness is my Ally.
There's a Merit one can get to do 'surgery' on vamps, but it requires very high status in (whatever the 'democratic'/ vox populi group is). That said, I would argue LaChance might be able to uncollapse a trachea or something. Not heal as such, but fix the mute status. Not important though.The pain removal worked.
I don't think normal medicine can help a vampire's injuries. You can use your Salubri healing though.
Rules as written, Obeah does not heal dead flesh. I'd surely like it to; it'd greatly improve it's utility, and I think there's a good argument for it working - the Blood is the Life, after all.
If you say it's cool, I'll spend vitae to heal her. Just letting you know the situation.