
Formative for Block Hemato wk 2

Quiz
•
Biology
•
University
•
Medium
Jongkonnee Thanasai
Used 8+ times
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A 20-year woman has prolonged bleeding wound after accident. CBC: HB 11.5 g/dl Hct 34% WBC 11,130/cc.mm (N 76 L 15 M 6 E 3)
Platelet 120,000, PT 10 sec aPTT 36 sec. Ristocetin cofactor activity is decreased.
Which is the best Blood components?
A. Cryoprecipitate
B. FFP
C. Cryoprecipitate depleted plasma
D. LDPR
E. LD single donor platelets
Answer explanation
Ristocetin cofactor activity is decreased -->
This test evaluates the function of von Willebrand factor by testing ristocetin-induced aggregation of normal platelets in the presence of the patient’s plasma. It measures the binding activity of vWF to platelet glycoprotein 1b. RcoF is the most sensitive and specific test for von Willebrand’s disease, and is decreased in virtually all types of the disease.
Cryoprecipitate contains
–80 to 150 IU of Factor VIII:C (anti hemophilic factor)
–250 mg fibrinogen
–von Willebrand Factor
–Fibronectin
–Factor XIII
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ผลการตรวจหมู่เลือดจากผู้ป่วยรายหนึ่งได้ดังตาราง นิสิตคิดว่าผู้ป่วยรายนี้มีหมู่เลือดใด
A Rh+
B Rh +
O Rh +
AB Rh +
O Rh-
Answer explanation
Cell grouping is a method to detect antigen on RBC.
Serum grouping is a method to detect antibody in the serum.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A blood grouping of a 30-year-old man is shown in the table.
Which of the following is his blood group?
A, Rh positive
A, Rh negative
B, Rh positive
B, Rh negative
AB, Rh positive
Answer explanation
Cell grouping is a method to detect antigen on RBC.
Serum grouping is a method to detect antibody in the serum.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ผู้หญิงเป็นธาลัสสีเมีย ได้รับเลือด leukocyte-reduced red blood cell 20 mL จากนั้นมีอาการ fever, chill, flank
pain อยากทราบว่าเป็น reaction แบบใด
Allergic reaction
Bacterial contamination
Anaphylactic reaction
Febrile non-hemolytic transfusion reaction
ABO incompatibility
Answer explanation
Classically, acute hemolytic transfusion reaction is described as a triad of symptoms; fever, flank pain, and red or brown urine. However, this classic presentation is not seen often. Other symptoms are chills, hypotension, renal failure, back pain, or signs of disseminated intravascular coagulation.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A 5-year-old girl with thalassemia has to receive blood transfusion regularly. Which of the
following agent can protect her from complication of blood transfusion?
Deferiprone
Folic acid
Ferrous fumarate
Calcium carbonate
Vitamin B complex
Answer explanation
Complication of regular blood transfusion is iron overload. Deferiprone is a prescription medicine used to treat iron overload from blood transfusions in people with thalassemia syndromes.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A 50-year-old woman with aplastic anemia for two years. CBC: Hb 8 WBC 1,800 (N20 L80)
platelet 80,000. Which blood component should be given to this patient?
FFP
Cryoprecipitate
Packed Red Cell
Leukocyte poor PRC
Leukocyte depleted PRC
Answer explanation
การให้เลือด
1. ควรได้รับ packed red cell ในกรณีที่ผู้ป่วยมีอาการของโลหิตจาง มีความเข้มของ hemoglobin น้อยกว่า 7 g/dL หรือ hematocrit ต่ำกว่าร้อยละ 21
2. ควรได้รับเกล็ดเลือด ในกรณีที่มีเลือดออก และจำนวน เกล็ดเลือดต่ำกว่า 10,000 /uL หรือผู้ป่วยที่จำเป็นต้องได้รับการทำหัตถการถ้าหากมีจำนวนเกล็ดเลือดต่ำกว่า 50,00/uL หรือ ในกรณีที่ผู้ป่วยมีไข้ และมีจำนวนเกล็ดเลือดน้อยกว่า 10,000 /uL อาจให้เกล็ดเลือดเพื่อป้องกันเลือดออก (prophylactic platelet transfusion)
3. ควรให้เลือดที่กรองเม็ดเลือดขาวออกเพื่อป้องกันการ เกิด allo-immunization
4. ควรใช้ single donor platelet เพื่อป้องกันการเกิด allo-immunization12
5. ในกรณีที่จะรักษาด้วยการปลูกถ่ายไขกระดูก ควรให้ เลือดและเกล็ดเลือดให้น้อยที่สุด และห้ามใช้เลือดที่บริจาคจากญาติพี่น้อง
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ชายอายุ 25 ปี หมู่เลือด O ได้รับเลือดผิดหมู่ เป็นหมู่ A ต่อมามีไข้ หนาวสั่น หายใจลำบาก ความดันต่ำ ต้อง
เฝ้าระวังอาการในอวัยวะใดมากที่สุด
A. Liver
B. Lung
C. Brain
D. Kidney
E. Spleen
Answer explanation
If there is a likelihood of an ABO incompatibility reaction, treatment should be initiated while awaiting laboratory data.
In general, the following steps should be followed:
1) The severity of HTRs is generally related to the volume of blood transfused, hence the most important thing is to stop the transfusion and immediately alert the blood bank.
2) Generally, all blood banks have a protocol in place to further evaluate potential HTRs which should be activated and strictly adhered to. A mismatched unit on your patient suggests that there may be another patient at risk for a mismatched unit.
3) Hemodynamic stability should be the prime concern along with ensuring an adequate airway and intravenous access. Patient should be moved to a telemetry monitored unit.
4) Treatment starts with aggressive fluid replacement with normal saline to prevent renal failure. Ringers lactate should be avoided to trigger calcium-induced clotting of the blood in the tubing. Similarly, dextrose solutions can worsen hemolysis of blood in the tubing. The initial rate could be 100ml/hr to 150ml/hr with intermittent fluid boluses to maintain a brisk urine output and avert renal failure.
5) The intravenous tubing, transfusion records (if on paper), donor blood bag should be preserved and sent down to the blood bank.
6) A fresh sample of the patient’s blood from the opposite arm should be sent to the blood bank and blood and urine laboratory investigations should be ordered.
8.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A 3-day female newborn is icteric. Laboratory findings are; Hct 42%, direct bilirubin 18 mg%, blood group A and Rh-negativity. The mother has O and positive Rh blood group.
Which laboratory investigation is the most appropriate?
Hb typing
Coombs’ test
Acid elution test
Liver function test
Osmotic fragility test
Answer explanation
ABO-HDFN occurs almost exclusively in neonates of blood group A or B who are born to group O mothers.
Pregnancies at risk of Rh-HDFN are those in which an Rh D-negative mother becomes pregnant with an RhD-positive child (the child having inherited the D antigen from the father).
To detect 'in vivo sensitized RBC' direct Coombs test is used.
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