Difficult times for you chrissa....he is an ill man and has been for a long time with a multiplicity of medical problems all challenging his body resources as the same time. Diabetes, peripheral vascular disease, hypertension, an undiagnosed back condition and now the onset of pneumonia.
The draining of his "stomach" fluid is significant of many disorders,any one of which could have serious consequences.
I do not know what type of pneumonia it is nor do I know what organism or organisms that are invading his lungs, so I cannot say if his condition can be "turned around"
Difficult for you chrissa and worrying for the medical staff.