What is diabetes mellitus Flashcards

1
Q

What hormone dominates the absorptive state (after a meal)

A

Insulin

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2
Q

What is insulins affect on adipose tissue

A

Reduces lipolysis

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3
Q

What is the effect of insulin on the liver

A

Reduced glucose production

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4
Q

What is the effect of insulin on muscle

A

Increased glucose uptake

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5
Q

What are symptoms of hyperglycaemia

A

Polydipsia, polyuria, blurred vision, weight loss and infections

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6
Q

Why does hyperglycaemia lead to polydipsia and polyuria

A

Excess glucose in the blood needs to be excreted out so micturition occurs more and more fluid is required for that to occur

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7
Q

What is a diagnostic fasting blood glucose value

A

More than or equal to 7 mmol/l

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8
Q

What is a diagnostic random blood glucose value

A

More than or equal to 11.1 mmol/l

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9
Q

What is a diagnostic HbA1c

A

more than or equal to 48mmol/mol

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10
Q

What is required to diagnose diabetes

A

One diagnostic lab glucose with symptoms
2 Diagnostic lab glucose or HbA1c without symptoms

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11
Q

What infection is common in diabetic patients

A

Thrush - high blood glucose allows the thrush causing bacteria to flourish

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12
Q

What does HbA1c show

A

Gives indication of blood glucose levels over last 8-12 weeks

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13
Q

When is HbA1c contraindicated

A

Children
pregnancy
Short duration of symptoms
People who are ill
Patients on medication which causes glucose rises such as corticosteroids
Pancreatic damage
Renal failure
HIV

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14
Q

What is intermediate hyperglycaemia fasting glucose value

A

6-1.7mmol/l

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15
Q

What is intermediate hyperglycaemia glucose tolerance test value

A

7.8 - 11mmol/l

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16
Q

What is HbA1c of intermediate hyperglycaemia

A

42-47mmol/mol

17
Q

What happens in type one diabetes

A

At some point in the individuals life they start creating autoantibodies which attack the beta cells of islets of langerhans which produce insulin

18
Q

What is the clinical presentation of type one diabetes (symptoms)

A

Thirst
tiredness
polyuria/nocturia
weight loss
blurred vision

19
Q

What is seen on examination of type one diabetics

A

Ketone breath (smells like nail polish)
Dehydration
raised resp rate, tachycardia and hypotension
infections such as thrush

20
Q

What age is type one diabEtes more commonly seen in

A

Younger patients

21
Q

What increases risk of type one diabetes

A

other autoimmune conditions and family history of other autoimmune conditions

22
Q

When can C peptide be measured reliably and what is C peptide

A

3 years after diagnosis and it is produced as a biproduct of insulin after it has been cleaved

23
Q

What does high levels of C peptide suggest

A

Patient probably does not have type one diabetes mellitus

24
Q

Type 2 diabetes has a high genetic risk

A

if both parents have it there is a 75% risk the child will develop it

25
Q

What are the symptoms of type 2 diabetes

A

may be no symptoms but usually has the general diabets symptoms - tired, polyuria, nocturia, blurred vision and polydipsia

26
Q

What are the risk factors of type 2 diabetes

A

Older
overweight
Family history of type 2 diabetes

27
Q

What is MODY - maturity onset diabetes in the young

A

Autosomal dominant - single gene defect which causes beta cell dysfunction

28
Q

What drug treatments can lead to secondary diabetes mellitus

A

corticosteroids

29
Q

What is gestational diabetes

A

Hyperglycaemia of pregnancy

30
Q

What happens in gestational diabetes

A

Increased insulin resistance in pregnancy
Usually associated with a family history of type 2 diabetes

31
Q

What neonatal issues can occur in gestational diabetes

A

Macrosomia - very large foetus

32
Q
A