1) i would change your patient problem to impaired mobility due to pain and muscle loss from bed rest as a result of a hip fracture/ ORIF. I feel phrasing such as this encorporates your interventions such as pain control and proper nutrition better.
2) I would include a physio assessment and daily mobilization goals as interventions. You kind of have it covered, but you could be more specific... We have ortho pathways that state day 1 pt will walk x meters, day 2 will walk so much further. Our physio also provides hip surgery patients with a list of exercises and daily workout recommendations, hence why I would add physio. I recognize all hospitals are different though
3) with the question reworded, you could include assessment for ortho static hypotension fir the first time or two the patient gets up, especially if they are receiving narcotics
4) will you also do a problem of increased risk of falling?
It's a good start. Hopefully my two cents help a bit