Final answer:
To achieve a desired effect in a patient's treatment without increasing intensity, which is already at the patient's maximum toleration, one would increase the Pulse Duration. This change can deliver more energy per pulse while keeping intensity constant, but it must be done within safe and tolerable limits.
Step-by-step explanation:
If the intensity of a therapy is set to a patient's maximum toleration and a desired effect has not been achieved, the other parameter you would increase is c. Pulse Duration. Intensity refers to the strength of the therapy being applied and is directly related to the amount of energy delivered. However, when a patient has reached their maximum tolerable intensity, one cannot simply increase the intensity further.
Pulse Duration, or the length of time each pulse lasts, is a parameter that can be adjusted to modify the energy delivered without increasing the intensity. By increasing the Pulse Duration, the therapy can deliver more energy per pulse, which might help achieve the desired therapeutic effect.
It is important to note that when adjusting Pulse Duration, patient comfort and safety should always be considered to prevent any potential tissue damage or adverse effects.