Maternal Adaption of the Renal System Flashcards Preview

Midwifery > Maternal Adaption of the Renal System > Flashcards

Flashcards in Maternal Adaption of the Renal System Deck (15)
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1
Q

By full term, how many milliletres of urine can the mothers bladder hold?

A

1000ml

2
Q

What makes the bladder more prone to infection during pregnancy?

A

Changes in the bladder mucosa which can lead to oedema

3
Q

What happens to the uterers during pregnancy?

A

Elongation
Dilation
Becomes more tortuous (twists)
Lateral displacement

4
Q

By how many cm do the kidneys increase in length by during pregnancy and why?

A

By 1cm due to the increased blood volume

5
Q

Which hormone causes dilation of the renal calyces and renal pelvices?

A

Progesterone

6
Q

By what percentage does the Glomerular Filtration Rate increase by during the first trimester and to what number of ml/min does it reach?

A

50%

180 ml/min

7
Q

What effect does an increase in Glomerular Filtration Rate have on the amount of protein excreted in the urine?

A

It can increase the amount and commonly reach 260 mg/day

8
Q

Why is pregnancy a period of significant water retention?

A

The filtered load of sodium increases and sodium reabsorption increases in the tubule so a net retention of 1g per day causes water retention

9
Q

What effect do increasing oestrogen levels have on renin production?

A

It increases

10
Q

What causes an increased retention of sodium in the renal tubule?

A

Increased levels of aldosterone

11
Q

What causes glycosuira?

A

Caused by progesterone and human placental lactogen which causes:
Insulin resistance
Increased glomerular filtraion
Decreased reabsorption in the distal tubule

12
Q

Why is the supply of oxygen more than the demand in a pregnant woman?

A

Carbon dioxide removal is more efficient and oxygen absorption is more efficient

13
Q

What does excess oxygen cause?

A

Respiratory alkalosis

14
Q

What is the pH range of arterial blood during pregnancy and in the non-pregnant body?

A

Pregnant: 7.40 - 7.45

Non-pregnant: 7.35 - 7.45

15
Q

How do the kidneys try to compensate for a higher pH level of arterial blood?

A

Reabsorb hydrogen

Excrete bicarbonate