Study of How Edema After Knee Replacement Surgery Affects TENS Amplitude Settings

What this Trial Is About

This research aims to compare the amplitude settings of three different frequency modes of Transcutaneous Electrical Nerve Stimulation TENS Conventional TENS, Low Frequency LF TENS, and High Frequency HF TENS in patients who have undergone total knee arthroplasty. It investigates whether the electrical resistance of swollen edematous tissue affects the TENS amplitude settings. Participants are evaluated both before surgery and in comparison with their opposite knee to understand how edema may influence the adjustment of TENS amplitude. Participants will receive assessments of TENS amplitude settings for all three modes, documenting levels at which tingling is felt, current is clearly noted, and the maximum tolerated amplitude or muscle contraction occurs. Measurements are taken preoperatively and 2 to 3 days after surgery. The study also considers the effects of edema amount and anesthesia type on these amplitude settings. During the study, participants will be evaluated before and shortly after surgery, with assessments focusing on TENS amplitude settings and edema impact. The main outcomes measured include differences in TENS amplitudes for each mode between pre- and post-arthroplasty states. Secondary measures examine how edema and anesthesia type influence amplitudes. The study is observational and continues until December 2026, with participant involvement primarily around the surgery period.

Does Edema Affect the Adjustment of TENS Amplitude