WBlood test
WAbelin reaction
WAnti-neutrophil cytoplasmic antibody
WAnticoagulant
WArterial blood gas test
WAshby technique
WBence Jones protein
WBlood culture
WBlood film
WBlood sugar level
WBlood typing
WC-reactive protein
WCaptopril challenge test
WCaptopril suppression test
WComplete blood count
WComprehensive metabolic panel
WCounterimmunoelectrophoresis
WCPK-MB test
WCytometry
WDilute Russell's viper venom time
WEcarin clotting time
WElliptocyte
WErythrocyte sedimentation rate
WFecal occult blood
WFerritin
WFingerstick
WFlow cytometry
WGel electrophoresis of proteins
WBlood glucose monitoring
WHematocrit
WHemoglobin electrophoresis
WKleihauer–Betke test
WMalaria antigen detection testsWMean corpuscular hemoglobinWMean corpuscular hemoglobin concentration
WPartial thromboplastin time
WPentagastrin
WPhlebotomy
WProcalcitonin
WProstate-specific antigen
WProthrombin time
WRed blood cell distribution width
WAssessment of kidney functionWGlomerular filtration rate
WThrombin time
WTotal iron-binding capacity
WVenipuncture
WWhite blood cell differential