Which of the following is NOT a parameter used in electrical stimulation therapy?

In the context of electrical stimulation therapy, waveforms, intensity, and duration are critical parameters that directly influence the efficacy of treatment. Each parameter plays a distinct role in how electrical impulses are delivered to the tissues:

• Waveforms determine the shape and characteristics of the electrical current, which can vary to achieve specific therapeutic goals. Different waveforms can produce different effects on muscle contraction and pain modulation.

• Intensity refers to the strength of the electrical current. Adjusting the intensity allows the clinician to tailor the stimulation to the patient's tolerance and treatment goals, such as muscle activation or pain relief.

• Duration indicates the time over which the electrical stimulation is applied during each pulse or train of pulses. This parameter affects how long the tissue is exposed to stimulation, which is crucial for achieving therapeutic effects.

While electrode size does have some impact on the distribution of the electrical current and comfort of the treatment, it is not typically categorized as a parameter of the electrical stimulation itself. Instead, it can be viewed more as a consideration for setting up the treatment rather than a controlling factor in the modulation of the therapy's electrical parameters. Therefore, it is not included as one of the key parameters used in electrical stimulation therapy.