Tough one.
My MO also suggested additional treatment after the 7 cisplatin/carboplatin treatments I had concurrent with the IMRT. The idea was to provide additional insurance. Ultimately, I decided against it, since any chemo regimen is inherently risky. It is a risk benefit thing... with the added complication that you do not know what is going on. Both RO and oral surgeon did not see the point of doing it. In my case the decision to continue with chemo treatment or not nearly coincided with the post TX PET/CT scan. I decided the following:
A) if the scan was clean then no more chemo
B) if the scan was ambiguous then get ROs opinion and likely have chemo
C) if the scan was positive... no choice chemo
as it turned out the scan was clean with one enlarged node with no activity. So I chose not to do it. (BWT that node behaved by the time the time I had the second PET/CT). The problem is that you only know in hindsight if that was a good decision or not. Even if you have the additional chemo this is no guarantee against a recurrence.
I have no first hand experience with the pump. My IMPRESSION is, if this is done alone it is not that big a deal (for 5-FU)
see the OC site or
http://www.cancerhelp.org.uk/help/default.asp?page=4007#commonMarkus