In the commentary by Douketis,1 the third sentence is incorrect. It should be “Recent studies have established that the combination of a negative d-dimer test result with a normal DUS or normal impedance plethysmographic measurement obviates the need for repeated non-invasive testing (1–3).”
References
- 1.
Douketis J. Commentary on “A negative d-dimer result and low-risk clinical status effectively ruled out DVT in symptomatic patients” and “A negative d-dimer test alone or combined with low-risk clinical status effectively ruled out symptomatic DVT.” Evidence-Based Medicine 2000 May/Jun;3:92–3.
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Comment on Aschwanden M, Labs KH, Jeanneret C, et al. The value of rapid d-dimer testing combined with structured clinical evaluation for the diagnosis of deep vein thrombosis. J Vasc Surg 1999 Nov;30:929-35; and
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Lennox AF, Delis KT, Serunkuma S, et al. Combination of a clinical risk assessment score and rapid whole blood d-dimer testing in the diagnosis of deep vein thrombosis in symptomatic patients. J Vasc Surg 1999 Nov;30:794–804.
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