Example units versus Units and Range

I have a problem with pressure units. The data I’m using comes in kPa. The relevant LOINC terms (i.e. 11556-8 Oxygen [Partial pressure] in Blood) all give only mmHg as the example units and the “Units and Range” field also gives only mmHg. Are the mmHg units only recommendations, so that I can use these LOINC terms with my data anyway stating separately what the actual units are?