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Flashcards in physiological changes Deck (13):
1

haematological

increased circulatory volume- dilution leads to anaemia. reduced oncotic pressure leads to oedema and increased GFR. incr procoagulation factors and venous stasis so incr risk DVT

2

respiratory

increased tidal volume, incr CO2 levels to facilitate diffusion across the placenta

3

cardio

ESMs and 3rd heart sound common. JVP dilated but not raised. stroke vol and HR increased

4

gastro

reflux due to reduced LOS tone and abdominal compression

5

what is the pregnant woman more at risk with regards to anaesthesia

aspiration

6

liver

more clotting factors produced

7

kidneys

increased GFR- reductioons in urea, urate, creat. glycosuria common

8

uterus

increased blood flow, uterine artery hypertrophy, maturation.

9

what does progesterone secreted by the placenta do (>12 weeks)

reduce LOS tone, increase tidal volume, stop the menstrual cycle

10

what maintains corpus luteum and inhibits FSH/LH in early pregnancy

beta HCG

11

what is linea nigra

oestrogen stimulates melanocytes to deposit more melanin. in the midline as more melanocytes here

12

what is striae gravidarum

oestrogen causes break down of elastin

13

what is increased demand by the fetus

calcium- for skeletal growth