age < 50 years
heart rate < 100 beats per minute
room air oxygen saturation ≥ 95%
no prior DVT or PE
no recent trauma or surgery (4 weeks)
no hemoptysis
no exogenous estrogen
no clinical signs suggestive of DVT
If all 8 criteria present, there is ~ 1% risk of VTE @ 45 days (Kline, et al. J Thromb Haemost. 2008 May;6(5):772-80)
Well's Score for PE (Wells, et al. Thromb Haemost. 2000;83:416-420):
Clinically suspected DVT: 3 points
Alternative diagnosis is less likely than PE: 3 points
HR > 100: 1.5 points
Immobilization/surgery in previous four weeks: 1.5 points
History of DVT or PE: 1.5 points
Hemoptysis: 1 point
Malignancy (treatment for within 6 months, palliative): 1 point
< 2: 2.9% PE
2-6: 15.8% PE } Pooled data from outpatients
> 6: 40.8% PE (Ceriani et al. J Thromb Haemost. 2010;8:957-70)
≤ 4 and neg d-dimer: 0.5% non-fatal VTE @ 3mo (van Belle et al. JAMA. 2006 Jan 11;295(2):172-9)
Revised Geneva Score (Ann Intern Med 2006;144:165) and
Simplified Revised Geneva Score ( 2008;168:2131):
Revised Simplified
Age >65: 1 1
DVT or PE in Past: 3 1
Surgery with General or Leg Fracture (within 1 month: 2 1
Active Cancer (or cured <1y): 2 1
Unilateral Lower Limb Pain: 3 1
Hemoptysis: 2 1
Heart Rate 75-94: 3 1
>=95: 5 2
Pain on lower limb deep venous palpation AND unilateral edema: 4 1
Results
0-3: 8% PE 0-1: 7.7% PE
4-10: 29% PE 2-4: 29.4% PE
≥ 11: 74% PE 5-7: 64.3% PE