hello,
if the patient is stable he wont be on the ventilator for more than 12 hours ,so there is no need to disturb the patient un necessarly as he will be off the ventilator soon!!!!! now if due to certain complications the ventilatory support is to be continued, then u have to act according to the patients presentations of symptoms make sure that no routine physiotherapy is given unnecessarily i.e given only if needed and indicated.