Table 1

 Criteria used to rule in deep vein thrombosis

CriterionNumber of algorithms
*The venometer is a type of strain-gauge plethysmograph.
Positive ultrasound scan38
Positive venogram2
Positive ultrasound, confirmed by venography in low risk patients1
Positive ultrasound or positive venometry* in high risk patients1
Positive ultrasound or positive venometry in high risk patients with a positive d-dimer1