wk 4- haemotological Flashcards

1
Q

define anaemia, symptoms,

A

decrease in hemoglobin, red cells or haematocrit

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2
Q

symptoms of anaemia

A

pallor,
fatigue,
dyspnoea,
palpitations,
headache,
loss of appetite,
skin and nail changes (koolonychia, spoon shaped- iron deficiency anaemia)

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3
Q

how can anaemia develop (3)

A
  1. blood loss (acute: trauma, childbirth, surgery or chronic: menorrhagia, GI bleeding)
  2. inadequate red cell production (iron deficiency, chronic disease, alcohol)
  3. excessive red cell destruction (red cell disease- sickle cell, conditons, infections)
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4
Q

what causes abnormal bleeding

A
  1. abnormal coagulation (hereditary- haemophilias, acquired- liver disease, immune thromboctopenia purpura)
  2. or platelets (hereditary- von willebrand disease)
  3. or blood vessels (hereditary haemorrhagic telengiectasia, ehlers-danlos syndrome)
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5
Q

define Von Willebrand disease, symptoms, diagnosis and treamtnet

A

hereditary deficiency of von willebrand factor (VWF)

VWF is synethesised by vascular endothelium and promotes platelet adhesion at the site of vascular injury

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6
Q

symptoms of VWD

A

symptoms:
easily bruised
mucosal bleeding
excessive bleeding from small cuts
menorrhagia
abnormal bleeding after surgery

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7
Q

diagnosis of VWD

A

-measurement of VWF antigen on blood testing

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8
Q

VWD management

A
  1. desmopressin or
  2. VWF replacement
    usually only necessary for surgery or excessive bleeding
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9
Q

define haemophilia, who it most likely affects, symptoms, treatment

A

2 types
hemophilia A (common), deficiency in factor VIII
hemophilia B, deficiency in factor IX

effects males the most as it is on the X chromosome

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10
Q

symptoms of haemophilia

A

bleeding into tissues frollowing minimal trauma
hemarthroses
muscle haematomas
retroperitoneal haemorrhage

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11
Q

treatment for haemophilia

A

for surgery
replacement clotting factor given

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12
Q

define immune thromboctopaenia purpura, common in, symptoms, diagnosis, treatment

A

easy bruising, purpura and bleeding from mucous membranes

common in children

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13
Q

symptoms of immune thromboctopenia purpa

A

muocutaneous bleeding
possibly post viral infection

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14
Q

diagnosis of ITP

A

diagnosis through FBC, isolated low platelets normal peripheral blood cells and smear

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15
Q

ITP management

A

usually not needed but
1. cortciosteroids,
2. IV immunoglobulin
3. anti-D

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16
Q

how can liver disease cause abnormal bleeding

A
  1. vitamin K deficiency due to cholestasis
  2. reduced synthesis of clotting factors
  3. thrombocytopaenia due to hypersplenism
  4. functional abnormalities in platelets and fibrinogen
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17
Q

what causes abnormal clotting

A
  1. inherited procoagulation disorder (factor V leiden)
  2. acquired procaogulation disorders
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18
Q

how does factor V leiden occur and treatment

A

Factor V is mutated to become resistant to degradation by activated protein C which results in excessive activation of coagulation cascade and tendency to thrombosis- typically causes unprovoked DVT

19
Q

treatment for factor V leiden

A

anticoagulants

20
Q

types of haematological malignancy (3)

A
  1. leukaemia
  2. lymphoma
  3. multiple myeloma
21
Q

define leukaemia

A

Malignant white blood cells (myeloid and lymphoid lineages) formed in the bone marrow, and which can circulate in the blood and to other tissues

22
Q

acute and chronic symptoms of leukaemia

A

acute symptoms:
anaemia
recurrent infections
easy bruising
bleeding

chronic symptoms:
-asymptomtic or
anaemia
recurrent infections
lymph node/liver/spleen enlargment

23
Q

diagnosis of leukaemia

A

peripheral blood examination and confirmed bone marrow biopsy

24
Q

leukaemia management

A

chemo

for chronic
2. monoclonal antibodies
3. bone marrow stem cell transplantation

25
Q

define lymphoma

A

tumours of malignant white cells (lymphoid lineages) arising in the reticuloendothelial and lymphatic systems

2 types:
1. hodgkin lymphoma (reed-sternberg cells)
2. non hodkin lymphoma

26
Q

symptoms of lymphoma

A

painless lymphadenopathy
fever, night sweats, weight loss

27
Q

diagnosis of lymphoma

A

lymph node biopsy

28
Q

treatment for lymphoma

A

chemo/radiotherapy

29
Q

define multiple myeloma

A

A cancer of abnormal bone marrow plasma cells (those that produce antibodies)

30
Q

symptoms of multple myeloma

A

fatigue/ anaemia
bone pain
recurrent infections

31
Q

diagnosis of multiple myeloid

A

serum and urine electrophoresis and immunofixation, bone marrow biospy

32
Q

treatment for multiple myeloid

A
  1. chemotherapy
  2. monoclonal antibody therapy
  3. radiotherapy
  4. autologous stem cell transplantation
33
Q

drugs used in haematology (3)

A
  1. anticoagulants (warfarin and heparin)
  2. antiplatelets (aspirin and clopidogrel)
  3. fibrinolysis (streptokinase and tissue plasminogen activators)
34
Q

normal haemostasis (3)

A
  1. primary haemostasis: formation of a haemostatic
    platelet plug which stops the bleeding
  2. Secondary haemostasis: activation of the clotting
    cascade, resulting in a fribin-reinforced platelet plug
  3. Fibrinolysis: clot is dissolved once injury has healed
35
Q

define thrombosis

A

formation of a haemostatic plug within the vasculature in the absence of bleeding

36
Q

what is the virchows triad

A

increased risk of clotting
1. Vessel wall injury (e.g. secondary to hypertension, smoking, dyslipidaemia)
2. Alterations in blood flow (turbulent or slowed) and
3. Abnormal coagulability of the blood

37
Q

heparin, how do they work

A

immediate acting injectable that inhibits coagulation by activation of antithrombin III

38
Q

Warfarin how does it work

A

oral tablet that takes several days to take effect but it interferes with production of functional vitamin K dependent clotting factors (II, VII, IX, X)

Can be reversed with Vitamin K antidote

warfarin has a narrow therapeutic range which varies depending on the condition it is prescribed for

39
Q

what would u use antiplatelets for

A

ischaemic heart disease
post acute coronary syndrome, stroke,
peripheral vascular disease

40
Q

what does aspirin do

A
  1. alters the balance between thromboxane A2 which promotes platelet aggregration and prostaglandin I2 which inhibits it,
  2. inactivates COX to reduce TXA2 synthesis in platelets

7-10 days for new platelets

41
Q

what does clopidogrel do

A

inhibits platelet responses to adenosine biphosphate = inhibits aggregation

42
Q

high INR means

A

bleeding risk

43
Q

full blood count levels

A