Lung Development-
6-8 wks - smooth muscle developing, cilliated cells, diaphragm complete,
10 wks - cartilage deposition begins, goblet cells, submucosal
glands
12 wks - lobes of lung demarcated , primal breathing
14 wks - arterial pattern recognizable by arteriogram
16 wks - bronchial tree nearly complete , type I & II cells
differentiate
20 wks - capillary network developing lung fluid output increasing
24 wks - sufficient capillary interface for gas exchange, surfactant
arising
28 wks - mature carotid bodies
28 wks - interstitial tissues and saccule walls become thinner,
maturing surfactant
36 wks - actual alveoli, 100ml/kg/day fluid output from lungs (fills
to FRC level)
8 years - alveoli proliferate 100 to 700 million
Artery PO2 - 24
Venous PO2 - 48
ultrasonography
doppler
amnio-afp(fetal tissue breakdown increases this),
L/S ratio, bili (rH incompatability)
creatnine -kidney
mec staining,
cytologic examination
fhr - audible 16-20 wks
fetal scalp - 7.25+
Delivery
Nageles rule- LMP-3m + 7d derives EDC
Fundal height -cm height relates to weeks gestation
quickening
fetal heart beat
nst
st
biophysical profile
cordocentesis
chorionic villus sampling- chromosomal assessment of fetal tissue from
placenta
estriol level
amniocentesis
| Biophysical Profile score 0 or 2 for each factor | ||
| Fetal Breathing | one episode in 30 min | |
| Gross movement | three movements in 30 min | |
| Fetal Tone | extension flexion one in 30 min | |
| Reactive NST | two accellerations 15 BPM in 30 min | |
| Amnionic Fluid Volume | One pocket 1X1 cm in two directions | |