Blood Transfusion Flashcards

1
Q

What are the main reasons for transfusing blood?

A

1 - Bleeding

2 - Failure of production of blood

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2
Q

What causes there to be different blood groups?

A

Antigens

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3
Q

What is the A antigen?

A

N-acetyl-galactosamine

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4
Q

What is the B antigen?

A

Galactose

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5
Q

What is the O gene?

A

Non-functional allele

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6
Q

What antibodies do you have if your blood type is A?

A

B antibodies

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7
Q

What antibodies do you have if your blood type is B?

A

A antibodies

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8
Q

What antibodies do you have if your blood type is O

A

A and B antibodies

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9
Q

What antibodies do you have if your blood type is AB?

A

No antibodies against A and B

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10
Q

Regarding antibodies and antigens for blood types, which are found on blood cell surface?

A

Antigens

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11
Q

Regarding antibodies and antigens for blood types, which are found in the blood?

A

Antibodies

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12
Q

If a patient with blood Type A is given blood type B, what will happen?

A

The patient will make B antibodies

The A antigen and the B antibodies will clump together, resulting in Agglutination

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13
Q

What blood type is the universal donor?

A

Type O (they have no surface antigens, so A, B or AB patients will not react and produce any antibodies - which is good)

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14
Q

What blood type is the universal recipient?

A

Type AB

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15
Q

Why is there a difference in compatibility of patients and donors in FFP compared with red cell donors?

A

Because the red cell donors are only giving their red cells (which contain the surface antigens) and not giving their antibodies (which circulate in the plasma)

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16
Q

In the case of an FFP donor, which blood type is the universal donor?

A

AB

17
Q

In the case of an FFP donor, which blood type is the universal recipient?

A

O

18
Q

Which mode of inheritance is the Rh antigen inherited?

A

Mendellian

19
Q

Which genotypes will have Rh+ phenotype?

A

RR

Rr

20
Q

Which genotypes will have Rh- phenotype?

A

rr

21
Q

If a Rh- woman and an Rh+ man have a child together, what phenotype will the fetus be?

A

Rh+

22
Q

In the late stages of a pregnancy in which an Rh- woman is carrying an Rh+ baby, what will happen to the Rh status of the mother? What implications will this have for further pregnancies she has where the baby is Rh+ again

A

She will make Rh+ antibodies

During the 2nd pregnancy with another Rh+ baby, the Rh+ antibodies will attack the Rh antigens found on the fetal red blood cells - this is Rhesus disease

23
Q

What happens to RBC’s in Rhesus disease?

A

They rupture

24
Q

What diseases are blood from blood donors screened for?

A

Hepatitis B, C, E

HIV

Syphilis

25
Q

What are the indications for a red blood cell transfusion?

A

1 - Correcting severe anaemia

2 - Improve quality of life in patient with uncorrectable anaemia

3 - Prepare a patient for surgery

4 - Reverese damage caused by the patients own cells (e.g. sickle cell disease)

26
Q

What are the indications for a platelets transfusion?

A

1 - Massive haemorrhage

2 - Bone marrow failure

3 - Prophylaxis for surgery

27
Q

What are the 2 different types of plasma components that are commonly transfused?

A

FFP

Cryoprecipitate

28
Q

What is coombs test used to test for?

A

Autoimmune haemolytic anaemia

29
Q

If red cells are required extremely urgently (minutes), what is the best blood type to give?

A

O RhD negative red cells

30
Q

In massive haemorrhages, what should be ordered?

A

6 units of red cells

4 units FFP

1 unit platelets

31
Q

What are the main risks associated with RBC transfusion?

A

TACO - Transfusion associated circulatory overload

Fever

Anaphylaxis

32
Q

What are the common reasons for death related to transfusions?

A

Pulmonary complications

Delays in receiving product

33
Q

What is the treatment if a patient suffers TACO following a transfusion?

A

O2

Diuretic

Ventilation

Adrenaline

34
Q

How is haemolytic disease of the new born prevented?

A

Anti-D

35
Q

How is Haemolytic disease of the newborn treated?

A

IGIN

Phototherapy for Jaundice