High tlc 25000 no known reason. Tlc?

My father had a heart attack, doctors were able to save him, in his angiography there was high diffused blockage in the 3 arteries. CABG was suggested. But they are not ready to do it due to high tlc. He had high blood sugar but it is now under control. Blood oxygen level is above 90. He had his ivp baloon removed yesterday and the vitals are being monitored. He is on liquid diet consisting of lemon juice and packaged coconut water mostly, however he has been vomiting that back, so they inserted a tube through his nose to take that out and avoid vomiting. He is on broad antibiotics and epinephrine. His platelets count is 90k. Hb 10. His blood culture and urine culture came empty. They changed the iv in neck and sent that for culture as well, but that came out empty as well. They are not able to figure out reason for high tlc and said the antibiotics needs to be given emperically. An ultrasound of stomach is suggested to be done again. What can be done to diagnose the cause of high tlc?