B Flashcards

1
Q

Which supplement is advised to take to a patient with sickle cell disease?

A

Folate (folic acid)

Sickle cell disease is a genetic condition where red blood cells become rigid and shaped like sickles, or crescent moons, instead of round. This abnormal shape can cause blockages in blood vessels, leading to pain, organ damage, and other health problems.

Folic acid is advised for patients with sickle cell disease because they often have an increased rate of red blood cell turnover, leading to a higher need for folic acid. Folic acid helps in the production of red blood cells, which can be depleted due to the condition.

In sickle cell disease, red blood cells are fragile and can break down more easily than normal. This increased fragility leads to a higher rate of red blood cell turnover, where the body needs to produce new red blood cells more frequently to replace the ones that are lost or damaged.

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2
Q

What drug can reduce the frequency of sickle cell crises

A

Hydroxycarbamide

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3
Q

What are the individuals with G6PD deficiency susceptible to developing what?

A

Acute haemolytic anaemia

“G6PD,” which stands for glucose-6-phosphate dehydrogenase. It’s an enzyme that plays a crucial role in protecting red blood cells from oxidative stress. When deficient, it can lead to a condition called G6PD deficiency, which can cause acute hemolytic anemia under certain conditions.

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4
Q

Which foods can cause acute haemolytic anaemia?

A

Fava beans, broad beans, fresh fava beans

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5
Q

State the drugs with definite risk of haemolysis in most G6PD-deficient individuals?

A

These drugs can induce oxidative stress in red blood cells, leading to the destruction of red blood cells in individuals with G6PD deficiency

Antimalarial drugs like fluoroquinolones

Rasburicase

Sulfonamide antibiotics/ Sulfones such as sulfamethoxazole (part of Bactrim or
Septra)

Nitrofurantoin, an antibiotic commonly used for urinary tract infections

Dapsone, which is used to treat leprosy, dermatitis herpetiformis, and certain other conditions

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6
Q

What is used to treat anemia associated with erythropoietin deficiency in chronic renal failure?

A

Epoetin’s

In chronic renal failure, the kidneys are unable to produce enough erythropoietin, which is a hormone responsible for stimulating the production of red blood cells in the bone marrow. This deficiency in erythropoietin leads to a condition called anemia of chronic kidney disease (CKD)

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7
Q

Which erythropoietin is used to treat anemia in preterm neonates of low-birth weight?

A

Epoetin beta

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8
Q

Which erythropoietin has a longer half-life and can be administered less frequently?

A

Darbepoetin

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9
Q

State the MHRA warning for epoetin’s?

A

Steven-johns syndrome

toxic epidermal necrolysis

Steven-Johnson syndrome is a severe skin reaction that typically occurs as a reaction to medication or an infection. It causes painful blisters, skin peeling, and can affect mucous membranes, including those in the mouth and eyes. It’s considered a medical emergency and requires immediate attention.

Toxic epidermal necrolysis (TEN) is a severe skin condition where the top layer of the skin separates from the lower layers due to a reaction to medication or infection. It causes widespread blistering and skin shedding, often accompanied by fever and other systemic symptoms. It’s a medical emergency requiring urgent treatment.

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10
Q

Advise patients of symptoms of severe skin reactions, stop treatment if:

A

They develop widespread rash / blistering

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11
Q

What are the symptoms of iron deficiency anaemia?

A

Lethargy
shortness of breath
heart palpitations
pale skin

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12
Q

State the conditions in which prophylaxis is required with iron?

A

Malabsorption
gastrectomy
menorrhagia
haemodialysis
pregnancy
premature infants

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13
Q

What patient counselling advice do you give to patients taking iron?

A

Take with or after food, and take with glass of orange juice to aid absorption

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14
Q

State the MHRA advice for intravenous iron?

A

Caution with every IV dose

Monitor for 30 mins after each injection

High risk in allergies

Avoid in pregnancy, especially first trimester

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15
Q

Define megaloblastic anaemia:

A

Most result from a lack of either vitamin B12 or folate

Megaloblastic anemia is a type of anemia characterized by the presence of unusually large and immature red blood cells called megaloblasts in the bone marrow. This condition is typically caused by a deficiency in vitamin B12 or folic acid, which are essential for normal red blood cell production. Without adequate levels of these vitamins, red blood cells fail to mature properly,

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16
Q

State one cause of megaloblastic anaemia:

A

Pernicious anemia in which lack of gastric intrinsic factor resulting from an autoimmune gastritis causes malabsorption of vitamin B12

This statement means that pernicious anemia is caused by an autoimmune condition where the body attacks the cells in the stomach that produce a substance called intrinsic factor. Intrinsic factor is needed to absorb vitamin B12 from food. Without enough intrinsic factor, the body can’t absorb vitamin B12 properly, leading to a deficiency and causing pernicious anemia.

17
Q

State treatment of B12 neuropathy:

A

Hydroxocobalamin or cyanocobalamin

Vitamin B12 plays a crucial role in maintaining the health of nerves and the myelin sheath, which is the protective covering of nerve fibers. When there’s a deficiency of vitamin B12, nerve cells can become damaged over time, leading to a condition called peripheral neuropathy.

This damage can disrupt the normal functioning of nerves,

18
Q

State treatment of folate deficiency:

A

Most causes are self-limiting or will yield a short course treatment with folic acid

19
Q

State treatment of folate-deficient megaloblastic anaemia:

A

Folic acid daily

20
Q

State prophylaxis in chronic haemolytic states, malabsorption, or in renal dialysis:

A

Folic acid is given daily or sometimes weekly

Chronic haemolytic states: Persistent conditions where red blood cells are continuously destroyed faster than they are produced in the body, leading to a long-term imbalance and resulting in ongoing anemia.

21
Q

State treatment for the prevention of methotrexate-induced side-effects in severe Crohn’s disease, rheumatic disease and severe psoriasis:

A

Folic acid

22
Q

State treatment of folate deficient megaloblastic anemia:

A

Folinic acid - but it is generally used in association with cytotoxic drugs; it is given as calcium folinate

23
Q

State which vaccinations and drug treatment a patient with sickle-cell disease is advised to take:

A

Pneumococcal vaccine

Haemophilus influenzae type b vaccine

Annual influenza vaccine

Hepatitis B if patient is not immune

Lifelong prophylactic penicillin can reduce risk of infection

24
Q

State which drug can prevent acute chest syndrome and reduce the frequency of painful crises and reduce transfusion requirement in sickle-cell disease:

A

Hydroxycarbamide

25
Q

State which drug is an option for preventing recurrent sickle cell crises (vaso-occlusive crises):

A

Crizanlizumab

Vaso-occlusive crises in sickle cell disease happen when sickle-shaped red blood cells block small blood vessels, causing severe pain and tissue damage

26
Q

State treatment of aplastic anemia:

A

Intravenous horse antithymocyte globulin in combination with ciclosporin

Ciclosporin alone

Oxymetholone

Aplastic anemia is a rare disorder where the bone marrow fails to produce enough blood cells, including red blood cells, white blood cells, and platelets. This deficiency can lead to fatigue, frequent infections, and excessive bleeding or bruising.

Intravenous horse antithymocyte globulin (ATGAM) is a medication derived from horse serum used in the treatment of certain conditions. It works by suppressing the immune system, particularly T cells, which can be overactive and attack healthy tissues in conditions like aplastic anemia. By dampening this immune response, ATGAM helps to restore normal bone marrow function in aplastic anemia patients. However, because it is derived from horse serum, there is a risk of allergic reactions, so it is typically administered under close medical supervision.

27
Q

State treatment for idiopathic sideroblastic anaemia:

A

Pyridoxine hcl

Idiopathic sideroblastic anemia is a rare blood disorder where the bone marrow produces abnormal red blood cells containing excess iron. This leads to problems with oxygen transport in the body. “Idiopathic” means the cause is unknown. Symptoms may include fatigue, weakness, and difficulty breathing.

28
Q

State what are epoetin’s used for:

A

Used to treat anemia associated with erythropoietin deficiency in chronic renal failure, to increase the yield of autologous blood in normal individuals and to shorten the period of symptomatic anemia in patients receiving cytotoxic chemotherapy

Autologous blood refers to blood that is donated by a person for their own use.

Cytotoxic drugs, also known as chemotherapy drugs, are medications used to kill or inhibit the growth of rapidly dividing cells. While they primarily target cancer cells, they can also affect normal cells that divide rapidly, such as those in the bone marrow or hair follicles, leading to side effects like bone marrow suppression, hair loss, and gastrointestinal issues. Examples of cytotoxic drugs include methotrexate, cisplatin, and doxorubicin.

29
Q

State what epoetin is used for preventions of anaemia in preterm neonates of low birth-weight:

A

Epoetin beta

Darbepoetin alfa (is a hyperglycosylated derivative of epoetin)

30
Q

State which drug is used for symptomatic anemia associated with chronic kidney disease:

A

Methoxy polyethylene glycol-epoetin beta

31
Q

State treatment of iron overload associated with haemochromatosis:

A

Repeated venesection

Desferrioxamine mesylate

Repeated venesection, also known as phlebotomy, refers to the process of drawing blood from a vein, typically for therapeutic purposes. In certain medical conditions, such as hemochromatosis or polycythemia vera, the body may produce too much iron or red blood cells. Repeated venesection is used as a treatment to reduce these excess levels.

32
Q

State the antidote for magnesium toxicity:

A

Calcium gluconate injection

33
Q

What can hypomagnesaemia often cause:

A

Secondary hypocalcaemia and also hypokalaemia

34
Q

Define neural tube defects:

A

Represents a group of congenital defects caused by incomplete closure of the neural tube within 28 days of conception

The most common forms are anencephaly, spina bifida and encephalocele

Pregnant women or who wish to become pregnant should be advised to take folic acid before conception and until week 12 of pregnancy

This can cause serious health problems for the baby, including paralysis, learning difficulties, and even death

35
Q

A higher daily dose (5mg) is recommended for women at high risk:

A

Women who previously had an infant with neural tube defects

Women receiving antiepileptic medication

Women who have diabetes

Women who have sickle-cell disease

36
Q

Define neutropoenia:

A

Characterised by low neutrophil count

37
Q

State the granulocyte-colony stimulating factors that can help increase the neutrophil count:

A

Filgastrim

Lenograstim

Pegfilgrastim

Lipegfilgrastim

Granulocyte-colony stimulating factors (G-CSF) are substances in the body that help stimulate the production of a type of white blood cell called granulocytes.