my mother suffers from high blood pressure, she is diabetic and has high cholesterol, she has also had a stroke. she recently had 2 operations to remove blood clots in her arterie (right leg) however 2 days after the op the leg from the knee below has gone cold and the doctors can not get a pulse either. they are saying there is cerculation there but it is minimal, wanted to ask is this normal and can it happen post op? also what questions should i be asking the doctors/surgeons as she has been in this condition for over a week and its not improving or getting worse? please advise