| UCO | ultrasonic cardiac output; urethral catheter out; urinary catheter out |
|---|---|
| FPRA | first pass radionuclide angiogram |
| HPF | heparin-precipitable fraction; hepatic plasma flow; high-pass filter; high-power field [microscope];... |
| LOP | leave on pass; left occipitoposterior [fetal position] |
| LPFN | low-pass filtered noise |