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42 Cards in this Set
- Front
- Back
Most accurate method to estimate GA |
CRL in first trimester |
|
Other techniques have a range of |
+- 2wks |
|
We need to look for other signs of IUGR when |
AC falls more than 2SD below the mean for GA |
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We need to look for skeletal dysplasia |
When FL falls short more than 2SD below the mean for GA |
|
When do we need to calcuate HC/AC |
If head and or abdomen fall short |
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What is used to determine EDC / EDD Based on LMP |
Naegele's rule |
|
Naegels rule |
EDD=LMP-3 months +7 days |
|
BPD level |
Thalami CSP |
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when can we measure BPD |
Starting from 10-12 wks |
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What is angle of asynclitism |
Fetal saggital suture and beam Has to be 90 degres |
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What measurement defines the shape of the head |
Cephaic index |
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CI normal range |
70-86% |
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Dolicochephay |
CI less than 70% |
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Brachycephaly |
CI more than 86% |
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In cases of doli or brachy |
BPD is eleminated from estiation of GA |
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What head measurement is more accurate in an abnormal head shape |
HC |
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AC is performed at level of |
Stomach Portal sinus of umbilical vein Includes soft tissue and fat |
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FL |
Measures anterior femur to reduce artifactual bowing Only diaphysis |
|
Least reliable measurement |
AC |
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Can be used in cases such as IUGR is present |
Transcerebellar distance Binocular distance |
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Other parameters when the usual ones are not accurate |
Clavicular length Foot length Binocular distance Tranacerebellar distance Other long bones |
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We can estimate GA by |
Epiphyseal apperance |
|
Ephyphyseal appearance |
Distal femoral ep-33 wks Proximal tibial-35 wks Prox humeral -38 wks |
|
Used to detect fetal asphyxia |
BPP |
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Parameters of BPP |
Breathing Movements Tone AFI Non stress test Mnemonic- BATMoN |
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First ultrasound parameter to disappear with hypoxia |
Breathing movements |
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Fetal breathing for 2 points |
One episode of 30 seconds in 30 min exam |
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Body movements for 2 points |
At least 3 body movements over 30 min exam |
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Fetal tone for 2 points |
One episode of limb extension/flexion within 30 min exam |
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Last parameter to disappear with fetal asphyxia |
Fetal tone |
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AFI for 2 points |
At least one pocket of 2 cm Some say 5 cm |
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Non stress test for 2 points |
2 episodes of accelerations >15 bpm for 15 sec over 30 min time frame |
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First parameter to disappear in fetal asphyxia |
Accelerations in heart rate |
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Fetal position is composed of |
Fetal lie Fetal presentation |
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Fetal lie |
Relationship of long axis of baby to long axis of mom Longitudinal or transverse |
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Fetal presentation |
Presenting part at internal os |
|
Fetal presentation |
Cephalic-vertex Breech Shoulder |
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Vertex |
Type of cephalic when parietal bones present first |
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Breech types |
Footling/incomplete Frank Complete |
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Footling breech |
Hips extended |
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Complete breech |
Hips flexed Knees flexed Both flexed |
|
Frank breech |
Hips flexed knees extended |