Dr Ethne Nussbaum said:
Setting aside the concern of stimulating cell growth, there is also doubt that a portable stimulator would be of any use. Portable devices commonly provide pulse durations up to 300ms and newer models likely up to 450-500ms. You do not mention whether there are signs of re-inervation of the calf muscles. Prior to that point, you may not be able to elicit a muscle contraction using a short pulse duration and a current amplitude that the patient can tolerate.
Well, we use stimulators that are capable of producing contractions of fully denervated muscles via long (miliseconds) biphasic impulses. I mean they are specifically created with capability to stimulate denervated muscles.