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ASCP hem & coag
| Question | Answer |
|---|---|
| t(15;17) | Acute promyelocytic leukemia /M3 Females w/ sudden onset of bleeding// DIC Retinoic acid receptor alpha gene Retinoic acid= complete remission |
| t(9;22) | CML Philadelphia chromosome// flower garden/// decreased LAP score |
| t(8;21) | AML/ M2 Adults, dysmeylopoiesis, psuedo pelger huet Myeloblastic anemia w/o maturation |
| 11q23 | AML/M5 Schilling type Monoblastic young adults & children |
| t(16;16) | AML myelomonocytic M4 Eo variation |
| CD 10, CD19, CD22, CD24 | ALL B cell precursors |
| CD2,CD4, CD5, CD8 | ALL T cell precursors |
| CD 19, CD20, CD23, CD5 | CLL |
| CD103, CD11c, CD25, TRAP | Hairy cell leukemia |
| Waldenstrom's macroglobulinemia | Malignancy of the lymphoplasmacytoid cells which manufacture IgM |
| WBC scatter plot: A: top left, B middle, C right, D bottom left | A:monocytes B:neutrophils C: Eosinophils D: lymphocytes |
| Why is the WBC count increased when the PB is analyzed automatically in a sickle cell anemia patient? | Sickled RBC's are resistant to lysis so are counted among the WBC population |
| What reagents are used in the PT test? | Thromboplastin and calcium replace the tissue thromboplastin and calcium necessary in vivo to activate factors VII and VIIa. this ultimately generates thrombin from pro thrombin via the coagulation cascade |
| Which ratio of coagulant to blood is correct for coagulation procedures? | 1:9 |
| The anticoagulant of choice for most routine coagulation studies is... | Sodium citrate |
| Which results would be expected for the prothrombin time PT and activated partial thromboplastin time APTT in a patient with polycythemia? | Both prolonged: The blood in a polycythemia patient contain so little plasma that access anticoagulant remains in is available to buy in to reagent calcium thereby resulting in a prolongation of the PT and aPTT |
| Which test would be abnormal in a e patient with Stewart power factor (factor X) deficiency? | Stewart power factor (factor X)!is involved in the common pathway of the coagulation cascade therefore it's deficiency prolongs both PT in aPTT |
| Normal Hgb | A, F, A2 |
| Sickle cell trait hgb | A: 50-70%, S: 20-40%, A2,F |
| Sickle cell anemia Hgb | S, F, A2 |
| Hgb AC trait | C,A, A2, F |
| Hgb SC disease | C,S, F A2 |
| Beta thalassemia minor Hgb | A2, A in equal parts F small |
| Beta thalassemia majior | Lg F, md A2, small A |
| Which clotting factor is not measured by PT and APTT test? | Factor XIII (fibrin stabilizing factor) It creates covalent bonds between fibrin monomers formed during the coagulation process to produce a stable fibrin clot. |
| What happens in the absence of factor 13 | The hydrogen bonded fiber in a polymers are soluble and 5M urea or in 1% monochloroacetic acid |
| A modification of which procedure can be used to measure measure fibrinogen? | Thrombin time. Fibrinogen can be quantitatively measured by a modification of thrombin time by diluting the plasma since of thrombin clotting time of diluted plasma is inversely proportional to the concentration of fibrinogen. (th clause method) |
| Vitamin K is necessary for activation of which clotting factors | Factors II,VII, IX and X It is required for Corboxylatiin of glutamate residues of these coagulation factors |
| Is vitamin K enhanced by heprin therapy | No |
| Distribution 30% spleen, 70% peripheral blood Reference ranges for platelets are 150,000 to 400,000/ mm3 the lifespan is 9 to 12 days | |
| What does the PFA test do | A test to see if platelets properly adhere an aggregate at the injury site. Basically checks if platelets are working correctly It takes the place of the historical bleeding time test |
| What does thrombin do? | Cleves peptides off of the fibrinogen molecules to form fibrin which polymerizes to form insoluble fibrin strands. thrombin also activates factor 13 which cross-links the fibrin strands at the D region . (birth of the D dimer) |
| Other function is of thrombin are | Feeds back to protonate factors V & VIII recruits and aggregates platelets turns on endothelial cell thrombomodulin (receptor/ activator for protein C and protein S system) to in activate factors V and VIII. |
| INR : | International normalized ratio reference ranges under 13 seconds therapeutic goal is 2.0 to 3.5 INR( patient result/ mean of ref range)^ISI |
| APTT | Screen for intrinsic and common pathways measures all factors except for VII & XIII monitors heparin therapy. Reagents: activator (Kaolin, celite, or ellagic acid), PLT phospholipid, cacl2 |
| APTT reference range | 20 to 40 seconds therapeutic goal is 1.5 to 2.5 times normal or use heparin response curve |
| Fibrinogen assay | Quantitative measure of factor I (fibrinogen) reference ranges : 200 to 400 mg/dl |
| PT prothrombin time | Screen for extrinsic and common pathways Measures factors I, II, V, VII, and X Monitors oral anticoagulants (warfarin Coumadin) Reagents: tissue thromboplastin and CACL2 sensitive to vitamin k factors INR |
| PT time reference range | < 13 seconds therapeutic reference range: 2.0 to 3.5 |
| Von Willebrand's disease | Wimpy Willy normal platelets decreased factor VIII decreased vWF |
| Bernard-Soulier | Super Bernie giant platelets |
| Reptile lease time | Snake venom enzyme. Test similar to thrombin time but is not inhibited by heparin (good to use on patients on heparin) reference range: 18 to 22 seconds |
| Abnormal ristocetin induced aggregation | Bernard- Soulier & von Willebrand |
| Hemophilia A | Inherited disorder deficiency of factor VIIII, sex linked recessive (men) spontaneous bleeding into joints, treat with commercial factor VIIII |
| Hemophilia B | Inherited disorder deficiency and factor IX, sex linked recessive ( men) clinically identical; hemophilia A treat with factor IX concentrates |
| Hemophilia C | Inherited disorder, deficiency in factor XI Incomplete Autosomal recessive, wide ranging clinical severity, high incidence in Ashkenazi Jews, only contact factor associated with bleeding |
| Von Willebrand disease | Inherited disorder, primary { 1*}defect in the von Willebrand factor, vWF factor Binds platelets via the glycoprotein 1B/V/IX receptor. 2*: deficiency a factor VIII, Autosomal dominant abnormal PFA test treat with cryoprecipitate |
| Factor XIII DEFICIENCY | Inherited disorder, Autosomal recessive, not detected by common coagulation test, poor wound healing, detected with the 5M urea test |
| Inherited disorders coagulation | Hemophilia A, hemophilia B, hemophilia C, von Willebrand disease, factor XIII deficiency |
| Intrinsic pathway | Pk, hk, XII, XI, IV, VIII |
| Extrinsic | III, VII, TF |
| COMMON patheay | X, V, II, I II: prothrombin I: fibrinogen |
| What is required to activate Protien C and become fully functional? | Streptokinase |
Created by:
Hdickerson79
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