yes please, my dad is diabetic, 73, and COPD, Congestive heart failure, and just had total knee replacement on his left knee...now has staph infection, and they went in yesterday and put in a knee that only moves 45 degrees...and want him to have another operation in 6 months...Good Lord...will he make it? I am scared...he looks very pale, has had several blood transfusions... and is weak...what should we expect