PRO TIME

• the expanded form, prothrombin time, is preferable, but if the short form is used it should be written as two words: pro time.

• Use numerals. It is acceptable to use a hyphen between the limits of a range if the following five conditions are met.
1. The phrases “from…to,” “from…through,” “between…and” are not used.
2. Decimals and/or commas do not appear in the numeric values.
3. Neither value contains four or more digits.
4. Neither value is a negative.
5. Neither value is accompanied by a symbol.

• when all five conditions are met, a hyphen may be used. (To may be used instead, even when the conditions are met.)
E.g. Our new office hours will be 1-4 p.m. Tuesday and Thursday.
Systolic blood pressures were in the 150-180 range.
BP was 120-130 over 80-90.
8-12 wbc or 8 to 12 wbc.