Physiology of Maternal Changes Flashcards

1
Q

What happens to CO and HR?

A

CO increases (CO=HRxSV) as a result HR increases

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2
Q

What happens to BP?

A

Drops during 2nd trimester

Increases back to pre-pregnancy in 3rd trimester

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3
Q

What nutrients must a mother take?

A

Iron during 2nd half of pregnancy
- iron requirements massively increase

Folic acid - 12wks prior and post fertilisation

Vit D

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4
Q

Why does blood viscosity decrease during pregnancy?

A

Less Hb mainly caused by dilation as plasma volume increases

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5
Q

Do reference ranges change during pregnancy?

A

Yes lots do!!! - important
Most are more sensitive to change apart from anaemia

  • have to have lower than non-pregnancy levels of Hb to be deemed anaemic (lower Hb levels are normal to an extent due to dilation)
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6
Q

Why does RR and tidal volume increase?

A

Increased demand for O2

Progesterone signals for lowering of CO2

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7
Q

Is there an increased or decreased renal plasma flow?

A

Increased

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8
Q

Pregnant women have hypercoaguable blood which helps during blood loss in pregnancy but what does it put them at higher risk of?

A

VTe - venous thrombotic event

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9
Q

What is the average maternal weight gain?

A

11kg

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10
Q

What hormone is responsible for increased appetite?

A

Progesterone

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11
Q

During what half of the pregnancy is the nutritional demand of baby higher?

A

2nd half

1st half = anabolic phase
2nd half = catabolic

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12
Q

Why must women take 400mcg folic acid?

When must they take it?

Who needs 5mg?

A

reduce risk of neural tube defects

12 weeks prior and 12 weeks in to pregnancy

Diabetics and epileptic

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