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Hematology Coagulation Testing and Methods II
Exam 6 Lecture 39 Rodak Chapter 45
58
Biology
Undergraduate 3
11/19/2014

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Term
Intrinsic system is measured by
Definition
APTT
Term
APTT measures ALL coagulation factors EXCEPT
Definition
VII, XIII
Term
Factors measured by APTT include factors
Definition
I, II, V, VIII, IX, X, XI, XII
Term
APTT - Reagents include an ___ ___ (__), a ____ _____, and an ___ _ ___ ( ___ ___)
Definition
activation substance (actin)
-Phospholipid substitute
-Activator of XII (calcium chloride)
Term
Normal APTT time is
Definition
25-35 seconds
Term
T or F:
You use the same device to measure APTT as you use to measure PT
Definition
True
Term
APTT is used to detect ___ ___ and to monitor ___ ____
Definition
inherited deficiencies
heparin therapy
Term
APTT (with heparin therapy) should be ___-___ times the baseline
Definition
1.5
2.0
Term
APTT can also be used to detect ____ and ___ ___
Definition
DIC
Circulating anticoagulants
Term
Factor assays are used to detect ____ ___ ___
Definition
inherited factor deficiencies
Term
What 2 types of Plasma will you use in factor assays?
Definition
Pooled normal plasma
Factor deficient plasma
Term
If patient is deficient in a factor, what will mixing the patient's plasma with pooled normal plasma do?
Definition
Correct
Term
% of factor activity is determined by the amount of _______ detected when specific dilutions of patient plasma are added to the factor-deficient plasma
Definition
correction
Term
If patient has the factor that is missing in the factor-deficient plasma, the APTT will be _____
Definition
normal
Term
If the patient does NOT have the factor that is missing in the factor-deficient plasma, the APTT will still be ______
Definition
abnormal
Term
Normal range for Factor Assay Results
Definition
50-150%
Term
Factor Assay Results:
No bleeding tendencies until <_____
Definition
50%
Term
Factor Assay Results:
Hemophilia values are often <______
Definition
10%
Term
What may be used when the APTT is prolonged?
Definition
Mixing studies using patient plasma and normal plasma in a 50:50 mix (1:1)
Term
If you use 50:50 and the APTT correct to normal, what will be present?
Definition
Factor deficiency
Term
If you use 50:50 and the APTT does NOT correct to normal, what will be present?
Definition
Inhibitor
Term
Lupus is an example of what when referring to APTT?
Definition
Inhibitor
Term
3 Tests for common pathway
Definition
Thrombin Time
Reptilase
Fibrinogen
Term
Time to convert fibrinogen to an insoluble fibrin clot after the addition of excess thrombin
Definition
Thrombin time
Term
The reagent thrombin cleaves ____
Definition
fibrinogen
Term
What does Thrombin Time NOT measure?
Definition
Intrinsic or Extrinsic pathways
Term
Thrombin time by-passes the ____
Definition
cascade
Term
Normal values of Thrombin Time are
Definition
10-15 seconds
Term
Thrombin Time will be prolonged in (5)
Definition
hypofibrinogenemia
dysfibrinogenemia
heparin therapy
circulating anticoagulants
DIC
Term
Thrombin Time is ____ ____ to heparin
Definition
Extremely sensitive
Term
Reptilase measures conversion of ____ to ____ without ____
Definition
Fibrinogen
Fibrin
Thrombin
Term
T or F:
Reptilase is NOT affected by HEPARIN
Definition
True
Term
Thrombin clotting time is inversely proportional to the ____ ___ _____
Definition
concentration of fibrinogen
Term
Normal Range of Clauss Method (Fibrinogen)
Definition
200-400 mg/dL
Term
_____ _____ ______ is inversely related to the concentration of fibrinogen
Definition
Fibrinogen clotting time
Term
____ ___ ___ measures fibrin products
Definition
Fibrin Split Products
Term
___-___ ___ measures the cross-linked fibrin
Definition
D-dimer assay
Term
Latex Agglutination for FDP or FSP:
Latex particles are coated with __ _ & ___ ___
Definition
Anti D and E fragments
Term
Normal for Latex Agglutination is <_____
Definition
10 micrograms/mL
Term
Latex agglutination will be ______ in DIC and heart attack/thrombosis detection
Definition
Increased
Term
D-Dimer Test:
______ also acts on the fibrin clot that leads to the generation of cross-linked fibrin containing D-dimer
Definition
Plasmin
Term
As the clot is broken down, the cross-links of factor _____ are removed, revealing fibrin monomers
Definition
XIII
Term
The D-dimer test specifically detects ___ __ _____
Definition
crosslinked D fragments
Term
Positive D-dimer test may be seen whenever ____ occurs
Definition
fibrinolysis
Term
Positive D-dimer test will not be seen when ____ occurs
Definition
fibrinogenolysis
Term
Advantage of the D-dimer test is that there is no interference from
Definition
fibrinogen
Term
3 Miscellaneous Coag Tests
Definition
Factor XIII assay
Inhibitors to coagulation
Screening for Lupus anticoagulants
Term
______ is observed in DIC, Deep vein thrombosis, pulmonary embolism
Definition
Fibrinolysis
Term
In absence of XIII, clots are ____ __ ___ ___ in a ___ ___ ___
Definition
unstable and easily soluble
weak urea solution
Term
Factor XIII Screening Test
Definition
Urea Solubility Test
Term
XIII converts ___ bonds to ____ bonds
Definition
Hydrogen
Covalent
Term
3 Inhibitors to Coagulation
Definition
AT-III
Protein C
Protein S
Term
____ ___ ___ are commonly used to measure functional levels of inhibitors to coagulation
Definition
Chromogenic automated methods
Term
____ ____ are used to screen for Lupus Anticoagulants
Definition
Mixing Studies
Term
3 Tests used to Confirm Lupus Anticoagulants
Definition
Platelet Neutralization Test
Anti-phospholipid ABY
Dilute Russell's Viper venom
Term
____ _____ are ABYs against phospholipids, observed in SLE, autoimmune disorders, malignancies, and certain drugs
Definition
Lupus Anticoagulants
Term
Factors used in Adsorbed Plasma
Definition
I
V
VIII
XI
XII
XIII
Term
Factors used in Aged Serum
Definition
VII
IX
X
XI
XII
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