Thank you all for your responses it has been much appreciated.
titch, yes i had a hip replacement about two years ago now and i was up walking and out of hospital in 4 days .
i thought my wife would have a similar experience. sadly not to be,
And I feel a bit guilty about encouraging her to have the OP.
Anna Marina , Thank you for that link it has been very helpful.
My son and I have a meeting with the Doctor and nurses tomorrow about her prognossis and what options are available to us about her future care, apparently after about 17 years of parkinsons she is now showing signs of dementia also.
Thank you for your concern
smiddy