I've just come across a paper on this very subject [1]. Fisher and Walker write:

"Looking further ahead, Rodriguez‐Molinero et al. ... hypothesised that in the future, body‐worn sensors could be used in conjunction with drug infusion pumps to provide dynamic real‐time dose adjustment in response to both the patient’s disease state and their level of activity."

Reference:

[1] Fisher JM & Walker RW (2013).
"Identification and treatment of wearing off in Parkinson’s disease."
Scottish Universities Medical Journal, 2.2,pp58-63
http://sumj.dundee.ac.uk/data/upload...2i2p.58-63.pdf

John