Since I take it your concern is the possible metal (titanium) used in the hip replacement, this is the areas for consideration.
Remote mode, no issues.
Contact mode, uses electricity. If used near the hip, may conduct through the metal rather than through the body. This can cause unpleasant sensations.
Plasma mode, should be no issues. The metal in the hip is not going to be disrupted like in the case of say a bio-implant that could be damaged if based on electrical circuits.
PEMF mode - should have no negative effect, output could be warped by the metal if used near the hip.
Cold Lasers - no issues.
For more details, please check the link: