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Ob/Gyn > Ob Percentages > Flashcards

Ob Percentages Flashcards

1
Q

What % of pts w/ PTL deliver w/in 7 days?

A

10%

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2
Q

What % of pts w/ PTL end up giving birth at term?

A

50%

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3
Q

McRoberts, suprapubic pressure, and delivery of the posterior arm will resolve what % of SD’s w/in 4 min?

A

95%

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4
Q

What % of PPH’s are d/t uterine atony?

A

70-80%

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5
Q

At what % blood loss do pt’s begin exhibiting s/s of acute blood loss?

A

25% (~ 1500ml)

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6
Q

What is the % risk of placenta accreta in pt’s w/ a h/o 1-6 CD’s?

A

H/o 1 CD: 0.2%
H/o 2 CD’s: 0.3%
H/o 3 CD’s: 0.6%
H/o 4 CD’s: 2%
H/o 5 CD’s: 3%
H/o 6 CD’s: 6%

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7
Q

What is the % risk of placenta accreta in pt’s w/ a placenta previa and h/o of 1-5 CD’s?

A

H/o 1 CD: 3%
H/o 2 CD’s: 10%
H/o 3 CD’s: 40%
H/o 4 CD’s: 60%
H/o 5 CD’s: 67%

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8
Q

What % of live newborns weigh >/=
4,000g?
4,500g?
5,000g?

A

4,000g: 8.0%
4,500g: 1.0%
5,000g: 0.1%

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9
Q

Of infants weight >/= 4,000g, what % are assc w/ GDM alone and what % are assc w/ GDM + obesity?

A

GDM: 13%
GDM + obesity: 22%

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10
Q

What is the % risk for LGA neonates in mothers w/
GDMA1?
GDMA2?
Pre DM?

A

GDMA1/2: 30%
Pre DM: 40%

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11
Q

An EFW > 4,500g is assc w/ an increased risk of _x for CD, SD, and PPH compared to non-macrosomic neonates.

A

CD: 2x higher incidence
SD: 7x higher incidence
PPH: 3x higher incidence

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12
Q

What is the % risk for SD w/ EFW > 4,500g + GDM?

A

20-50%

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13
Q

IOL at 37-38w for EFW > 95 %ile decreases risk of SD from ___% to ___%.

A

4%
1%

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14
Q

How many times more likely is a SD w/ a VAVD in the presence of macrosomia?

A

3-5x

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15
Q

What is the % incidence of PROM?

A

8%

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16
Q

For PROM w/ expectant management, what % of pts will deliver w/in 24 hrs?

A

95%

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17
Q

For PPROM, what % of pts will deliver w/in 1 wk?

A

50%

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18
Q

For PPROM, what % of pts will experience IAI? PP infxn?

A

IAI: 15-35%
PP infxn: 15-25%

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19
Q

For Periviable PPROM, what % of pts will deliver w/in 1 wk? 2 wks?

A

1 wk: 50%
2 wks: 80%

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20
Q

What is the risk increase of 3rd & 4th degree lacs s/p FAVD? VAVD?

A

FAVD: 6x
VAVD: 2x

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21
Q

What % risk is assc w/ ICH and neurologic sequelae s/p operative vaginal delivery?

A

ICH: 0.15%
Neurologic sequelae: 0.45%

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22
Q

What % of women will experience sx recurrence of HSV during pregnancy? at delivery?

A

Pregnancy: 75%
Delivery: 15%

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23
Q

What is the overall % success rate for ECV?

A

60%

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24
Q

What is the % risk of perinatal mortality for FGR and severe FGR?

A

FGR: 1.5% (2x normal risk)
Severe FGR: 2.5% (3x normal risk)

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25
Q

What is the recurrence risk of FGR?

A

20%

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26
Q

What is the % of severe maternal morbidity for CD vs SVD?

A

CD: 2.7% (3x higher)
SVD: 1.0%

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27
Q

What is the % expulsion rate for immediate pp IUD insertion?

A

10-25%

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28
Q

What is the rate for stillbirth? A h/o a stillbirth increases the rate by ___?

A

5/1000
5x higher (0.03%)

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29
Q

What is the % incidence (for breastfeeding women) of mastitis? mastitis w/ breast abscess?

A

Mastitis: 10%
Breast abscess: 3%

30
Q

What is the incidence of pp urinary retention?

A

5/1000

31
Q

What is the % incidence of mono/mono twins?

A

0.05%

32
Q

What is the % fetal death rate for mono/mono twins?

A

17%

33
Q

What are the % rates for nuchal cord x1, x2, and x3?

A

x1: 20-35%
x2: 2-5%
x3: 0.2-0.5%

34
Q

What is the % risk of VTE in pregnancy w/ a h/o VTE? w/o h/o VTE?

A

H/o VTE: 10%
NO h/o VTE: 0.5-1.2%

35
Q

What is the % risk of uterine rupture during TOLAC w/ a h/o low transverse uterine incision? IOL w/ TOLAC?

A

TOLAC: 0.5%
IOL: 1%

36
Q

What is the % risk of recurrence of severe 3rd/4th degree laceration?

A

3%

37
Q

What % of stillbirths have an abnormal karyotype?

A

5-15%

38
Q

What is the % recurrence rate for PTD?

A

35%

39
Q

Compared to Whites and Hispanics, Blacks have a ___% higher rate of PTD?

A

50%

40
Q

What is the % recurrence risk for SD?

A

10-15%

41
Q

What % of placenta accreta have concomitant previa?

A

80%

42
Q

What % of pts w/ placenta accreta require a blood transfusion?

A

90%

43
Q

What is the % risk of uterine rupture during TOLAC w/ 2 prior LTCS’s?

A

1-2%

44
Q

What is the % risk of uterine rupture during TOLAC s/p classical hysterotomy incision?

A

1-12%
(Avg 5%)

45
Q

What is the % plasma increase during pregnancy?

A

40-50%

46
Q

What is the % RBC mass increase during pregnancy?

A

15-25%

47
Q

What % of pregnancies are affected by FGR?

A

10%

48
Q

What is the % risk of fetal death in FGR and severe FGR fetuses?

A

FGR = 1.5% (2x normal)
Severe FGR = 2.5%

49
Q

What is the % recurrence risk for HELLP syndrome?

A

7%

50
Q

What is the % risk of developing GHTN or PreE after a pregnancy w/ HELLP syndrome?

A

20% for each

51
Q

What is the % risk of PPH in non-macrosomic, and macrosomic pts?

A

Non = 2%
Macrosomic = 5%

52
Q

What is the % risk of CS in non-macrosomic and macrosomic pts?

A

Non = 12%
4,000g = 20%
4,500g = 27%

53
Q

What is the % recurrence of lactational mastitis in pts w/ + w/o Lactobacillus probiotics?

A

W/ = 25%
W/o = 57%

54
Q

What is incidence of placenta previa at < 20w vs > 20w?

A

< 20w = 5%
> 20w = <1% of the 5%

55
Q

What % of complete placenta previas will resolve by term?

A

80-90%

56
Q

What is the % recurrence risk for PTD?

A

15-20%

57
Q

What is the incidence % of velamentous cord in singleton and monochorionic twin gestations?

A

Singleton = 1%
Monochorionic = 15%

58
Q

What is the incidence of IUFD?

A

6/1,000

59
Q

What is the incidence % of uterine rupture w/ a prior low vertical vs prior T-incision?

A

Low vertical = 1-7%
T-incision = 4-9%

60
Q

What is the risk of OASIS w/ FAVD?

A

3-11%

61
Q

What % of pts w/ PTL have spontaneous resolution?

A

30%

62
Q

TXA reduces the mortality rate from obstetrical hemorrhage from 1.7% to _.

A

1.2%

63
Q

What is the rate of uterine rupture in IOL for pts undergoing TOLAC w/ and w/o PGE use?

A

W/ PGE = 2.25%
W/o PGE = 0.7%

64
Q

What is the rate of stillbirth for women under 35yo compared to the rate for AMA women?

A

< 35 = 5/1,000
AMA = 15/1,000

65
Q

What is the rate of stillbirth in women w/ SLE?

A

50-150/1,000

66
Q

What is the incidence % of acute pyelonephritis in pregnancy?

A

1-2%

67
Q

What is the rate of endometritis in SVD pts and in CD pts prior to ROM?

A

SVD = 1-3%
CD = 5-15%

68
Q

What is the risk of having a fetus w/ a neural tube defect when there is one affected sibling?

A

3%

69
Q

What % of all malignant tumors diagnosed during pregnancy are Dysgerminomas?

A

30% (MC ovarian malignancy dx’d in pregnancy)

70
Q
A

Ob/Gyn (5 decks)

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