The Infrex Plus Pain machne in interferential mode treatment is an excellent alternative to knee pain medication. The Infrex Plus is a combination interferential and tens unit in one pain machine. Bob Johnson shows proper electrode placement for best results for treating chronic knee pain using the Infrex Plus unit on Interferential mode. Infrex Plus also is a tens unit and can be used on TENS, TNS, machine mode as well as carryover pain relief from the interferential mode. Electgrode placement for knee pain is the same in tens mode or interferential mode.
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