PROCT - Overview: Prolonged Clot Time Profile

Test Catalog

Test ID: PROCT    
Prolonged Clot Time Profile

Useful For Suggests clinical disorders or settings where the test may be helpful

Determining cause of prolongation of prothrombin time or activated partial thromboplastin time


Screening for prolonged clotting times and determining the presence of factor deficiency(ies) or inhibitor (factor-specific, lupus-like, or the presence of heparin)

Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.

Test IDReporting NameAvailable SeparatelyAlways Performed
PTCProthrombin Time (PT), PYes, (order PTTP)Yes
APTTBActivated Partial Thrombopl Time, PYes, (order APTTP)Yes
DRVTDilute Russells Viper Venom Time, PYes, (Order DRVTI)Yes
TTThrombin Time (Bovine), PYesYes
FIBCFibrinogen, PYes, (order FIBTP)Yes
DIRMD-Dimer, PYes, (order DDITT)Yes
SFMSoluble Fibrin MonomerNoYes
CCCSpecial Coagulation InterpretationNoYes

Reflex Tests Lists test(s) that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial test(s)

Test IDReporting NameAvailable SeparatelyAlways Performed
IBETHBethesda UnitsNoNo
F8ISCoag Factor VIII Assay Inhib Scrn,PNoNo
FACTVCoag Factor V Assay, PYesNo
F_7Coag Factor VII Assay, PYesNo
F_9Coag Factor IX Assay, PYesNo
F_10Coag Factor X Assay, PYesNo
F_11Coag Factor XI Assay, PYesNo
F_12Coag Factor XII Assay, PYesNo
F8ACoag Factor VIII Activity Assay, PYesNo
RPTLReptilase Time, PYesNo
F_2Coag Factor II Assay, PYesNo
PNPPlatelet Neutralization ProcedureNoNo
PTMXPT Mix 1:1NoNo
DRVTCDRVVT ConfirmationNoNo
STLAStaclot LA, PNoNo

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

Initial testing includes: prothrombin time (PT), activated partial thromboplastin time (APTT), dilute Russells viper venom time (DRVVT), thrombin time (bovine), fibrinogen, D-dimer, soluble fibrin monomer, and special coagulation interpretation.
If PT is > or =14 seconds, PT mix will be performed.
If APTT is >36 seconds, APTT mix will be performed.
If APTT mix is >36 seconds with no evidence of heparin in samples, platelet neutralization procedure will be performed.
If DRVVT ratio is > or =1.2, DRVVT mix and DRVVT confirmation will be performed.
If thrombin time is >23 seconds, reptilase time will be performed.

If PT, APTT, or DRVVT is prolonged, coagulation factor assays may be performed.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test

Method Name A short description of the method used to perform the test


FIBC: Clauss Methodology

DIRM: Automated Latex Immunoassay (LIA)

SFM: Immunoturbidimetric

PNP: Activated Partial Thromboplastin Time (APTT) Mixing Test

F_2, FACTV, F_7, F_10: Prothrombin Clot-Based Assay

F8A, F_9, F_11, F_12, F8IS, IBETH: Activated Partial Thromboplastin Clot-Based Assay

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

Prolonged Clot Time Prof

Aliases Lists additional common names for a test, as an aid in searching

Prolonged Clot Time Profile