US of A?

I normally have my morning drink at the clinic while waiting for our clinic assistants to sort out files for patients scheduled for the day. I can't help smiling to myself one particular morning when I overheard the following conversation between the 2 clinic assistants:

CA1 (much older but new to the department): akak rasa patient ni takkan datang klinik hari ni pasal dia dah pergi Amerika..

CA2 (younger but has been in the department much longer): macam mana akak tau patient ni pergi Amerika?

CA1: tu...ada orang tulis kat file patient "pergi US"

CA2: ohhh.....yang tu bukan lah....pergi US maksudnya....pergi UltraSound