A mnemonic for the wells criteria scoring that I use. Based on the Clock.

From Midnight to 6am, its all about the here and now: Does this patient have PE , or does he not?

Noon to 3PM: Clinical signs of PE (3 points)

3PM-6PM: Other alternative diagnosis (3points)

6PM-9PM: All about the past (since its getting dark outside): 1.5 points for Past surgeries, 1.5 points for past DVT/PE

9PM-Midnight: Bloody Cancer 100. Hemoptysis (1 point), cancer (1 point) 100 (1.5 points, remember this b/c theres 3 digits and its .5 extra points).