Page 757 - Clinical Hematology_ Theory _ Procedures ( PDFDrive )

Glossary 741

vasa vasorum – small networks o blood vessels that supply nutri- W

ents to the tissues o the wall o a blood vessel Wal enström’s primary macroglobulinemia – neoplastic proli era-
vascular integrity – the resistance to vessel disruption tion o the lymphocyte plasma cell system

vasoconstriction – contraction o the blood vessel wall war arin – a blood anticoagulant with the brand name, Coumadin

vasoocclusion – a blockage in a blood vessel Western blot – hybridization technique similar to the Southern blot

VCS – volume, conductivity, scatter in which the electrophoresed sample is protein and the detector

veins – collecting vessels that return blood to the heart is immunoglobulin
venipuncture – a medical procedure to withdraw a sample o circu- Wiskott-Al rich syn rome – a blood coagulation disorder charac-

lating blood rom a vein terized by extremely small platelets (thrombocytes)

ventricles – cerebral ventricles are hollow spaces in the brain Worl Health Organization (WHO) Classi cation – the organiza-
venules – microscopically sized veins tion o blood abnormalities by a recognized medical organization

VH – variable region o the immunoglobulin heavy chain gene Wright stain – a Romanowsky-type blood stain

locus

viscosity – thickness X

vitamin B – cobalamin
12
vitamin B e ciency – see pernicious anemia xanthochromia – yellow color
12
von Willebran ’s isease – a genetic disorder producing a de -

ciency and de ect o blood coagulation actor VII and de ective Z
platelet unction zymogen – an inactive blood-clotting actor