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OB Cards Flashcards

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1
Q

Antibodies that do NOT cause hemolytic disease

A

Lewis, I, Duffy (Fyb)

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2
Q

Antibodies that DO cause hemolytic disease

A

Kidd, Kell, Duffy (Fya)

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3
Q

Antibodies that cause severe hemolytic disease of newborn

A

D, E, C, k1 (Kell) ‘DECK’

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4
Q

Aneuploidy risk by maternal age of Down Syndrome

A

30: 1/1000
35: 1/365
40: 1/100
45: 1/36

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5
Q

Aneuploidy risk by maternal age of any chromosomal abnormality

A

30: 1/500
35: 1/180
40: 1/50
45: 1/18

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6
Q

When to perform NT

A

11.0-13.6, ideally 12th week

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7
Q

Abnormal NT size?

A

> 3mm

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8
Q

Concerns if +NT but negative genetics?

A

Suspect cardiac anomaly

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9
Q

Elevated NT associated with which aneuploidies?

A

18, 21

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10
Q

Molecules that cross placenta

A

PIMP TILTT
PTU, Iodine, Mag, Propranolol
TRH, IgG, LATS, T3, T4,

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11
Q

Molecules that do NOT cross placenta

A

Tyrosine, Triiodothyronine, Insulin, Heparin, Prednisone, TSH, Glucagon

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12
Q

Molecules that cross placenta via simple diffusion

A

O2, CO2, electrolyes, ketones

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13
Q

Molecules that cross placenta via active transport

A

PICA
Phosphorous, Iron, Calcium, Amino Acids

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14
Q

Molecules that cross placenta via facilitated diffusion

A

-ose
Glucose, sucrose, fructose

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15
Q

Molecules that cross placenta via endocytosis

A

IgG

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16
Q

Molecules that cross placenta via bulk flow

A

Water

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17
Q

Molecules that cross placenta via carrier mediated

A

Iodine

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18
Q

Expected O2, CO2, pH, base excess of umbilical vein

A

O2: 30
CO2: 40
Base excess: -2.4 to -4.5
pH: 7.32-7.34

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19
Q

Expected O2, CO2, pH, base excess of umbilical arteries

A

O2: 20
CO2: 50
Base excess: -2.7 to -5.6
pH: 7.24–7.27

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20
Q

Recommended mg iron/day

A

4mg/iron QD

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21
Q

Which reflects more of the fetal acid/base status, artery or vein gasses?

A

Artery (coming FROM fetus, shows how it metabolizes)

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22
Q

CV changes increased in pregnancy

A

HR, CO, plasma volume, red cell volume

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23
Q

CV changes decreased in pregnancy

A

SVR

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24
Q

Renal changes increased in pregnancy

A

GFR (50%)

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25
Respiratory changes increased in pregnancy
Minute ventilation IC TV
26
Respiratory changes decreased in pregnancy
TLC, ERV, RV, FRC (TERF), partial pressure CO2
27
Respiratory changes unchanged in pregnancy
VC, IRV
28
Thyroid hormone that decreases in pregnancy?
T3, Iodide TSH initially decreases first 10 weeks, then unchanged/increased
29
How does LDL and HDL change with progesterone?
Progesterone increases LDL, decreases HDL
30
Pro-coagulant factors increased in pregnancy
Fibrinogen (1), 7, 8, 10, VW, PA-1, PA-2
31
Pro-coagulant factors decreased in pregnancy
11, 13 (Gram + Pop)
32
Pro-coagulant factors unchanged in pregnancy
2,5,9
33
Anti-coagulant factors increased in pregnancy
N/A
34
Anti-coagulant factors decreased in pregnancy
Protein S (Saba)
35
Anti-coagulant factors unchanged in pregnancy
Protein C, Anti-Thrombin 3
36
How does T4 and free T4 change in pregnancy?
T4 increases, free T4 stays the same (because TBG also increases)
37
Hypothyroid meds to use in each trimester and A/E
1: PTU - liver disease, agranulocystosis (sore throat, fevers) 2: Methimazole - aplasia cutis (if used before second trimester) 3: Methimazole - aplasia cutis
38
Limiting dimension for delivery?
Ischial spines
39
Definition of diagonal conjugate
Symphysis pubis to sacral promontory
40
Which pelvic conjugates can be directly measured
Diagonal conjugate
41
Which pelvic conjugates cannot be directly measured
Obstetric conjugate, true conjugate
42
Calculate obstetric conjugate
Diagonal conjugate - 1.5
43
Definition of contracted obstetric conjugate
<10.5
44
Cephalad to caudad conjugate measurements
TOD True Obstetric Diagonal
45
What should BPD measurement be on term baby
9.3cm
46
What should femur length measurement be on term baby
7.4
47
CRL + ** = weeks in gestation
CRL in cm + 6.5
48
Definition of engagement
BPD passed plane of inlet (presenting part at ischial spines)
49
Most accomodating pelvic shapes for delivery
Gynecoid, Anthropoid
50
Pelvic shape most commonly associated with OP
AnthrOPoid
51
Pelvic shape with prominent ischial spines
Android
52
Stages of embryonic development and when do things change from haploid to diploid
Secondary oocyte (n) > fertilization (n + n) > zygote (sperm+egg, 2n) > 2/4/8 cell stage (fertilized egg, 2n) > Morula (16 cells, embryo days 2-3 post fertilization, 2n) > Blastocyst (32 cells, embryo days 4-5 post-fertilization, 2n)
53
Female = Male: Paraurethral glands
Prostate Gland
54
Female = Male: Labia majora
Scrotum
55
Female = Male: Labia minora
Median raphe
56
Female = Male: Round ligament
Gubernaculum testis
57
Female = Male: Gartner's duct
Vas deferens
58
Female = Male: Clitoris
Phallus
59
Female = Male: Bartholin
Cowper
60
Female = Male: Uterus
Utricle prostaticus
61
Female = Male: Vestibular bulb
Corpus spongiosum
62
Female = Male: Granulosa
Sertoli
63
Female = Male: Clitoris
Penis
64
Most common type of twin and percentage?
Dizygous, 66%
65
Days of splitting per type of twin
Di-di: 0-3 Mo-di: 4-8 Mo-Mo: 9-12 Conjoined: 13+
66
Of monozygous twins, what type is the most common?
Mo-di (2/3)
67
Sign for dichorionic pregnancy
Lambda/Delta/Twin peak
68

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