Because hospitals have a new revenue model. It goes like this:

Call every possible illness “COVID” and route them to the ICU, sedate them and put them on a ventilator. When the ventilator kills them, call it a “COVID death”. Keep your ICU at a high level of occupancy with these people and rake in a massive flow of taxpayer cash. No need for insurance claims, no need to do anything but call it COVID and take in the moolah.

Your ultrasound is chump change and will only cause them overhead with paperwork anyway. COVID is all they want to do now. It will never end.