SUMMATIVE PART 2

50問 • 1年前

問題一覧

The percentage of red cells recovered after thawing and deglycerolization of frozen blood is: A. 35% B. 50% C. 70% D. 80%

D. 80%

Frozen and thawed RBCs processed in an open system can be stored for how many days/hours? A. 3 days B. 6 hours C. 24 hours D. 15 days

C. 24 hours

For apheresis donors who donate platelets, a platelet count must be performed prior to the procedure and be at least: A. 150 x 109/L B. 250 x 109/L C. 200 x 109/L D. 300 x 109/L

A. 150 x 109/L

Which of the following precludes acceptance of a plateletpheresis donor? A. Platelet count of 75 × 109 /L in a donor who is a frequent platelet donor B. Plasma loss of 800 mL from plasmapheresis 1 week ago C. Plateletpheresis performed 4 days ago D. Aspirin ingested 7 days ago

A. Platelet count of 75 × 109 /L in a donor who is a frequent platelet donor

An important determinant of platelet viability during storage is: A. Plasma potassium concentration B. Plasma pH C. Prothrombin time D. Activated partial thromboplastin time

B. Plasma pH

What is the lowest allowable pH for a platelet component at outdate? A. 6 B. 5.9 C. 6.2 D. 6.8

C. 6.2

Platelets must be kept in constant motion for which of the following reasons? A. Maintain the pH so the platelets will be alive before transfusion B. Keep the platelets in suspension and prevent clumping of the platelets C. Mimic what is going on in the blood vessels D. Preserve the coagulation factors and platelet viability

A. Maintain the pH so the platelets will be alive before transfusion

.According to AABB Standards, Platelets prepared from Whole Blood shall have at least A. 5.5 x 1010 platelets per unit in at least 90% of the units tested B. 6.5 x 1010 platelets per unit in 90% of the units tested C. 7.5 x 1010 platelets per unit in 100% of the units tested D. 8.5 x 1010 platelets per unit in 95% of the units tested

A. 5.5 x 1010 platelets per unit in at least 90% of the units tested

The optimum storage temperature for platelets is: A. - 20ºC B. - 12ºC C. 4ºC D. 22ºC

D. 22ºC

If a platelet bag is broken or opened, the platelets must be transfused within ____ when stored at 20 to 24 o C A. 4 hours B. 24 hours C. 5 days D. 7 days

A. 4 hours

What increment of platelets/µL (platelets/L), in the typical 70-kg human, is expected to result from each single unit of random donor platelets (RDP) to recipient? A. 3,000 – 5,000 B. 5,000 – 10,000 C. 20,000 – 25,000 D. 25,000 – 30,000

B. 5,000 – 10,000

A 70-kg man has a platelet count of 15,000/µL, and there are no complicating factors such as fever or HLA sensitization. If he is given a platelet pool of 6 units, what would you expect his post-transfusion count to be? A. 21,000-27,000/µL B. 25,000-35,000/µL C. 45,000-75,000/µL D. 75,000- 125,000/µL

C. 45,000-75,000/µL

SHELF-LIFE OF FRESH FROZEN PLASMA stored at -65o C: A. 24 hours B. 5 days C. 1 year D. 7 years

D. 7 years

According to AABB standards, FRESH FROZEN PLASMA must be infused within what period of time FOLLOWING THAWING? A. 24 hours B. 36 hours C. 48 hours D. 72 hours

A. 24 hours

FFP can be transfused without regard for: A. ABO type B. Rh type C. Antibody in product D. All of these options

B. Rh type

A blood component prepared by thawing Fresh Frozen Plasma at refrigerator temperature and removing the fluid portion is: A. Plasma Protein Fraction B. Cryoprecipitate C. Factor IX Complex D. FP24

B. Cryoprecipitate

Cryoprecipitate contains how many units of Factor VIII? A. 40 B. 80 C. 130 D. 250

B. 80

Cryoprecipitate may be used to treat all of the following, except: A. von Willebrand’s disease B. Hypofibrinogenemia C. Idiopathic thrombocytopenic purpura (ITP) D. Factor XIII deficiency

C. Idiopathic thrombocytopenic purpura (ITP)

Although ABO compatibility is preferred, ABO incompatibility is acceptable for which of the following components? A. PF24 B. Cryoprecipitated AHF C. Apheresis Granulocytes D. Apheresis Platelets

B. Cryoprecipitated AHF

The optimum storage temperature for cryoprecipitate is: A. – 20 ºC B. –12ºC C. 4ºC D. 22ºC

A. – 20 ºC

Cryoprecipitate maintained in the frozen state of -18 °C or below, has a shelf life of: A. 42 days B. 6 months C. 12 months D. 36 months

C. 12 months

Cryoprecipitate must be transfused within what period of time FOLLOWING THAWING AND POOLING? A. 4 hours B. 8 hours C. 12 hours D. 24 hours

A. 4 hours

The primary indication for GRANULOCYTE TRANSFUSION is: A. Prophylactic treatment for infection B. Additional supportive therapy in those patients who are responsive to antibiotic therapy C. Clinical situations where bone marrow recovery is not anticipated D. Severe neutropenia with an infection that is nonpresponsive to antibiotic therapy

D. Severe neutropenia with an infection that is nonpresponsive to antibiotic therapy

Irradiation of a unit of Red Blood Cells is done to prevent the replication of donor: A. Granulocytes B. Lymphocytes C. Red cells D. Platelets

B. Lymphocytes

The purpose of a low-dose IRRADIATION of blood components is to: A. Prevent posttransfusion purpura B. Sterilize components C. Prevent graft-vs-host (GVH) disease D. Prevent noncardiogenic pulmonary edema

C. Prevent graft-vs-host (GVH) disease

A cancer patient recently developed a severe infection. The patient’s hemoglobin is 8 g/dL owing to chemotherapy with a drug known to cause bone marrow depression and immunodeficiency. Which blood products are indicated for this patient? A. Liquid plasma and cryoprecipitate B. Crossmatched platelets and washed RBCs C. Factor IX concentrates and FFP D. Irradiated RBCs, platelets, and granulocytes

D. Irradiated RBCs, platelets, and granulocytes

All Blood Collection Units (BCUs) shall achieve and maintain ___ voluntary blood donation. The key function of the BCU is effective donor recruitment and safe blood collection. A. 10% B. 50% C. 70% D. 100%

D. 100%

Whole blood collected in BCUs shall be stored immediately after collection and validation in a blood bank refrigerator or COLD BOX at 1 to 6 oC. As much as possible, blood should be submitted to the Blood Bank/Center within ____ after collection. A. 6 hours B. 8 hours C. 12 hours D. 24 hours

D. 24 hours

The blood warmer should have automatic temperature control with an alarm that will sound if the blood is warmed over ___°C. A. 30 oC B. 37 oC C. 40 oC D. 42 oC

D. 42 oC

LEUKOCYTE-POOR RED BLOOD CELLS would most likely be indicated for patients with a history of: A. Febrile transfusion reaction B. Hemophilia A C. Iron deficiency anemia D. von Willebrand disease

A. Febrile transfusion reaction

The type of cell MOST FREQUENTLY RESPONSIBLE FOR FEBRILE TRANSFUSION REACTIONS is the: A. Erythrocyte B. Lymphocyte C. Granulocyte D. Platelets

C. Granulocyte

With or without documentation of the existence of specific antibodies, the AABB recommends leukocytepoor preparations only after a patient has had at least ___ febrile nonhemolytic transfusion reactions. A. One B. Two C. Three D. Four

B. Two

A transfusion reaction that usually appears rapidly during transfusion termed “WARM” and may result in fever, shock, or death is which one of the following listed reactions? A. Hemolytic B. Bacterial contamination C. TACO D. Allergic

B. Bacterial contamination

An emergency trauma patient requires transfusion. Six units of blood are ordered stat. There is no time to draw a patient sample. O-negative blood is released. When will compatibility testing be performed? A. Compatibility testing must be performed before blood is issued B. Compatibility testing will be performed when a patient sample is available C. Compatibility testing may be performed immediately using donor serum D. Compatibility testing is not necessary when blood is released in emergency situations

B. Compatibility testing will be performed when a patient sample is available

PHOTOTHERAPY is most useful for which of the following antibodies: A. Anti-A B. Anti-D C. Anti-K D. Anti-S

A. Anti-A

Advantages of CORDOCENTESIS: 1. Allows measurement of fetal hemoglobin and hematocrit levels 2. Allows antigen typing of fetal blood 3. Allows direct transfusion of fetal circulation 4. Decreases risk of trauma to the placenta A. 1 and 3 B. 2 and 4 C. 1, 2 and 3 D. 1, 2, 3 and 4

C. 1, 2 and 3

The LILEY METHOD of predicting the severity of hemolytic disease of the newborn is based on the amniotic fluid: A. Bilirubin concentration by standard method B. Rh determination C. Change in optical density measured to 450 nm D. Ratio of lecithin to sphingomyelin

C. Change in optical density measured to 450 nm

Which of the following is the preferred specimen for the initial compatibility testing in exchange transfusion therapy? A. Maternal serum B. Paternal serum C. Eluate prepared from infant’s red blood cells D. Infant’s post-exchange serum

A. Maternal serum

EXCHANGE TRANSFUSIONS are used primarily to: A. Provide antigen negative RBCs B. Remove antibody C. Remove antibody coated RBCs D. Remove high levels of unconjugated bilirubin and thus prevent kernicterus

D. Remove high levels of unconjugated bilirubin and thus prevent kernicterus

All of the following are routinely performed on a cord blood sample except: A. Forward ABO typing B. Antibody screen C. Rh typing D. DAT

B. Antibody screen

All of the following are reasons for a positive DAT on cord blood cells of a newborn except: A. High concentrations of Wharton’s jelly on cord cells B. Immune anti-A from an O mother on the cells of an A baby C. Immune anti-D from an Rh negative mother on the cells of an Rh-positive baby D. Immune anti-K from an K-negative mother on the cells of a K-negative baby

D. Immune anti-K from an K-negative mother on the cells of a K-negative baby

Infants do not require crossmatching during: A. The first 4 months B. The first 6 months C. The first year D. An indefinite period if a parent’s blood is used

A. The first 4 months

Preliminary blood bank testing for neonates <4 months of age must include: A. ABO forward typing and ABO reverse typing B. ABO reverse typing and testing for K antigen C. ABO reverse typing and antibody detection testing D. ABO forward typing and Rh testing for D antigen

D. ABO forward typing and Rh testing for D antigen

Recommended speed of the SEROFUGE for agglutination grading: A. 500 g B. 800 g C. 1,000 g D. 2,000 g

C. 1,000 g

Heavy spin centrifugation: A. 2, 000 x g for 2 to 3 minutes B. 5, 000 x g for 5 minutes C. 10,000 x g for 5 minutes D. 15,000 x g for 10 minutes

B. 5, 000 x g for 5 minutes

All blood banks as mandated by law must have a: A. Water fountain B. Written laboratory safety program C. BSC D. Foot-operated hand wash

B. Written laboratory safety program

One of the best ways to protect employees and keep a safe laboratory environment is to provide employees with: A. Health insurance B. Safety education C. Rest breaks D. Fluid-repellent laboratory coats

B. Safety education

What is the purpose of competency assessment? A. Identify employees in need of retraining B. Evaluate an individual’s level of knowledge during a job interview C. Identify employees who need to be fired D. All of the above

A. Identify employees in need of retraining

A56-year-old female with cold agglutinin disease has a positive direct antiglobulin test (DAT). When the DAT is repeated using monospecific antiglobulin sera, which of the following is most likely to be detected? A. lgM B. lgG C. C3d D. C4a

C. C3d

A crossmatch is positive at AHG phase with polyspecific AHG reagent but is negative with monospecific anti-IgG AHG reagent. This may indicate the antibody: A. Is a weak anti-D B. Is a clinically insignificant Lewis antibody C. Can cause decreased survival of transfused RBCs D. Is a Duffy antibody

B. Is a clinically insignificant Lewis antibody

other names parasitology

Yves Laure Pimentel · 70問 · 2年前

other names parasitology