II. Background

  1. Time for blood to clot in a glass tube (clotting activated by contact with glass surface)
  2. Reflects integrity of the Intrinsic Clotting Pathway

IV. Lab: Normal

  1. Whole Blood Clotting Time: 9-15 minutes

V. Technique

  1. Venous blood (2 ml) is drawn into an empty test tube
  2. Test tube is kept upright for 20 minutes
  3. Tube is flipped upside down at 20 minutes and considered abnormal if not fully clotted
    1. Grade 1: Friable clot
    2. Grade 2: No Clot Formation

VI. Interpretation: Prolonged Whole Blood Clotting Time

  1. Any defect in the Intrinsic Clotting Pathway will prolong the Whole Blood Clotting Time

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Related Studies

Ontology: Whole Blood Coagulation Time (C0043159)

Definition (MSH) The time required by whole blood to produce a visible clot.
Concepts Laboratory Procedure (T059)
MSH D014914
SnomedCT 142978002, 71819008, 165566005
CPT 85345
English Activated Coagulation Time, Whole Blood, Blood Coagulation Time, Whole, Coagulation Time, Whole Blood, Coagulation time; Lee and White, ACTIVATED COAG TIME WHOLE BLOOD, WHOLE BLOOD COAG TIME, BLOOD COAG TIME WHOLE, COAG TIME WHOLE BLOOD, Whole Blood Coagulation Time, blood coagulation time, whole blood coagulation time, COAGULATION TIME LEE AND WHITE, COAGULATION TIME LEE & WHITE, Lee and White coagulation time test, Coagulation time lee & white, Whole blood clotting time (procedure), whole blood clotting time (lab test), Coagulation time, Lee White, Lee White coagulation time, Whole blood coagulation time, Blood coagulation time, WBCT - Whole blood clotting time, Whole blood clotting time, Coagulation time, Lee White (procedure), Whole blood clotting time procedure (procedure), Whole blood clotting time procedure
Swedish Helblodskoagulationstid
Czech krev plná - koagulační čas
Finnish Hyytymisaika
French Temps de coagulation sur sang total, Temps de coagulation, TC (Temps de Coagulation), Temps de coagulation activé sur sang total
Russian VREMIA SVERTYVANIIA TSEL'NOI KROVI, SVERTYVANIE KROVI TSEL'NOI, VREMIA, SVERTYVANIIA VREMIA, TSEL'NAIA KROV', ВРЕМЯ СВЕРТЫВАНИЯ ЦЕЛЬНОЙ КРОВИ, СВЕРТЫВАНИЕ КРОВИ ЦЕЛЬНОЙ, ВРЕМЯ, СВЕРТЫВАНИЯ ВРЕМЯ, ЦЕЛЬНАЯ КРОВЬ
Polish Czas krzepnięcia krwi
Japanese 活性化凝固時間-全血, 全血凝固時間, 全血活性化凝固時間, 凝固時間-全血, 血液凝固時間-全血
Norwegian Helblodskoagulasjonstid, Aktivert koagulasjonstid, fullblod, Koagulasjonstid, fullblod, Aktivert koagulasjonstid, helblod, Fullblodskoagulasjonstid, Koagulasjonstid, helblod
Spanish TCA - tiempo de coagulación activado, procedimiento de tiempo de coagulación activado (procedimiento), procedimiento de tiempo de coagulación activado, tiempo de coagulación activado, tiempo de coagulación de Lee White, tiempo de coagulación de la sangre, tiempo de coagulación de sangre entera, tiempo de coagulación, Lee White (procedimiento), tiempo de coagulación, Lee White, Tiempo de Coagulación Sanguínea Activada, Tiempo de Coagulación de la Sangre Total
German Aktivierte Gerinnungszeit, Vollblut, Blutgerinnungszeit, Voll-, Gerinnungszeit, Vollblut-, Gesamtblut-Gerinnungszeit
Italian Tempo di coagulazione su sangue intero
Dutch Bloedstollingstijd, Bloedstollingstijd, geactiveerde
Portuguese Tempo de Coagulação do Sangue Total Ativada, Tempo de Coagulação do Sangue Total