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Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

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Additional Details

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Item Value
ClinicalQuestion Does my patient have von Willebrand disease? If so, which type?
TestEntryNumber 802
TestCode PTT
TestName Complete Blood Count (includes Platelet Count)
Synonyms blood count; CBC; hematology survey; RBC; Red cell count; Hemoglobin; Hematocrit; Red Cell Indices
IsThisScreeningTest It depends
PubMedID PMID:18315614,11686101
NLMID:101518625,101539022
Comment - prolongation is neither sensitive nor specific for vWD, although prolongation may be a feature of vWD (in particular, severe type 1 as well as types 2N and 3)
- consider other diagnoses in addition to vWD if prolonged
Sensitivity low
Specificity low
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