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IMPACTILL Model of Spyropoulos et al for Identifying a Hospitalized Medical Patient at Risk for Venous Thromboembolism

Purpose: To predict the risk of venous thromboembolism (VTE) in a medical patient using the IMPACTILL model of Spyropoulos et al.

Description

Spyropoulos et al evaluated hospitalized medical patients for the risk of venous thromboembolism (VTE). They developed a model that can be used to identify patients who may benefit from more aggressive management. The study was performed by the International Medical Prevention Registry on Venous Thromboembolism (IMPROVE) investigators.


Mnemonic: IMPACTILL

 

Term

Parameter

IM

immobilized

P

previous VTE

A

age

C

cancer

T

thrombophilia

I

ICU or CCU stay

LL

lower limb paralysis

 

 

Parameter

Finding

Points

immobilization

none or < 7 days

0

 

>= 7 days

1

history of thromboembolism

no

0

 

yes

3

age of the patient in years

<= 60 years of age

0

 

> 60 years of age

1

current cancer

no

0

 

yes

2

known thrombophilia

no

0

 

yes

2

ICU or CCU stay

no

0

 

yes

1

lower limb paralysis

no

0

 

yes

2

 

total score =

= SUM(points for all 7 parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 12

• The higher the score the greater the risk of venous thromboembolism within the next 3 months.

 

Score

Observed VTE

Observed Pulmonary Emboli (Half VTE)

0 or 1

<= 0.6%

0.3%

2 or 3

1.5%

0.6 to 0.8%

4

4.8%

2.8%

5 to 10

8%

3.8%


 


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Specialty

Objective

ICD-10