Criterion | Number of algorithms |
---|---|
Negative d-dimer in low risk patients | 20 |
Negative d-dimer in low or moderate risk patients | 4 |
Negative venometry in low risk patients | 1 |
Negative d-dimer and venometry in low risk patients | 4 |
Negative d-dimer in low risk patients or negative venometry in any patient | 2 |
Negative d-dimer and venometry in any patient | 1 |
Negative d-dimer in any patient | 2 |
Low Wells score alone | 1 |
None, other than negative ultrasound or venogram | 8 |