Hello Capegirl,
I found a medical acronym file that has some if not all of the acronyms you inquired about. For instance, O/E means On Examination; PN means Poorly Nourished; PV means Plasma Volume or Peripheral Vascular.
Here is the link so you can check it out:
http://www.jdmd.com/glossary/medabbr.pdf
Good luck,
Barbie
These are possible and are medically acceptable abbreviations. D/E(deferred exam), O/E (on exam), IWR (I will report), PN/PV (paranigral / plasma volume), SIR (somatostatin immunoreactivity), DNR (did not report).