Watch the ii V I online guitar lesson by Matthieu Brandt from Jump Blues
In a more jazzy approach of a jump blues progression the turnaround is often changed.
Instead of using a normal V - IV - I - V progression in the last 4 bars, we're playing a IIm7 - V7 - I - V7 .
When we do this the bass line changes and we also have to change the way we solo on it. Because the chords have changed, different scales have to be used.
As we've seen with the different types of mixolydian scales on the I, IV and V chords, we have to keep moving with the chords.