Hello and welcome to HCM,
You have mentioned that you have had a head surgery
for cancer. Necrotic tissue and pus were removed from the wound site. After few days there was pulsations, gas formation in the subcutaneous tissue
and discharge of purulent material from the wound site.
During your hospital stay you developed pseudomonal infection. Piperacillin
was the appropriate drug for pseudomonal infection.
After that the gas formation in the tissues indicates an infection called gas gangrene caused by a bacteria called Clostridium welchi.
are appropriate drugs for this condition.
Since, you are diabeteic chances of developing these infections is more as compared to general infections.
Thanks and take care.
Dr Shailja P Wahal