OBJECTIVE SCORING SYSTEMS FOR RISK OF PULMONARY EMBOLISM

Wells Criteria

Geneva Criteria

(Geneva is more robust than Wells)

Wells' scoring system for PE

Criteria

Points

Suspected DVT

3

Alternative diagnosis less likely than PE

3

HR > 100 bpm

1.5

Immobilisation/Surgery previous 4/52

1.5

Previous DVT/PE

1.5

Haemoptysis

1

Malignancy (active within 6 months)

1

 

Risk

Points

% Patients with these features

Probability of PE (%)

Low

0-2

40

3.6

Moderate

3-6

53

20.5

High

>6

7

66.7

Geneva scoring system for PE

Criteria

Points

Age 60-79

1

Age > 79

2

Previous DVT/PE

1

Recent Immobilisation/Surgery previous

3

HR > 100 bpm

1

pCO2

< 36
36-39

 

2
1

pO2

< 49
49-60
60-71
61-82

 

4
3
2
1

CXR

Platelike atelectasis
Elevation of hemidiaphragm

 

1
1

 

Risk

Points

% Patients with these features

Probability of PE (%)

Low

0-4

49

10

Moderate

5-8

44

38

High

9-12

6

81