amniotic fluid Flashcards Preview

Obstetrics > amniotic fluid > Flashcards

Flashcards in amniotic fluid Deck (21):
1

what is it secreted by

amniotic cells (which lie over the placenta) into the amniotic sac

2

what happens to the amniotic fluid

99% water. swallowed by fetus, enters fetal circulation absorbed by intestinal villi or transudation through skin. in last 1/4 pregnancy- fetal urinary adds to it

3

what is polyhydramnios

increased secretion amniotic fluid because of a large placenta or fetal malformation preventing the fetus from swallowing the fluid or being absorbed

4

causes of polyhydramnios

diabetes, multiple pregnancy (large placenta); anencephaly, spina bifida, atresia of the upper GI tract (abnormalities of the fetus)

5

what happens in acute polyhydramnios

fluid accumulates quickly. distress to mother

6

signs acute polyhydramnios

dyspnoea, tachycardia, abdominal pain, vomiting

7

what is acute most freq associated with

monochorionic twins

8

treat acute polyhydramnios

remove fluid by amniocentesis

9

what is chronic polyhydramnios

slow accumulation. symptoms similar to acute. distended uterus- feel a fluid thrill

10

test in polyhydramnios

ultrasound

11

treatment polyhydramnios

minor- relieved by sedation at night. amniocentesis- 500ml removed at one time. after 35 weeks- induce vaginal amniocentesis

12

what is the risk of amniocentesis in poly

pre term labour, abruption

13

why should the liquor be released slowly in treatment poly

prevent cord prolapse

14

what is likely after treatment poly

PPH

15

what is oligohydramnios

defective liquor secreting cells or in late pregnancy- renal tract malformation preventing fetal urination

16

associations oligohydramnios

post date, renal tract malformation, following rupture of membranes

17

if oligohydramnios occurs early in pregnancy what is the management

abortion

18

if pregnancy continues in oligohydramnios what may happen

amniotic bands form which can damage the fetus

19

test oligohydramnios

ultrasound

20

what can oligohydramnios cause later in pregnancy

pulmonary hypoplasia pressure deformities- wry neck, club foot, altered shape of the skull

21

what can oligohydramnios cause in labour

lack of amniotic fluid can lead to umbilical cord compression and fetal distress- transcervical infusion of saline into the amniotic sac