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OB/GYN > UWorld 1 > Flashcards

UWorld 1 Flashcards

1
Q

35 yo F evaluated for fixed palpated breast mass s/p b/l reduction mammoplasty for mammary hyperplasia 2 yrs ago

  • mammo shows spiculated 3x3 mass w/ calcifications
  • US: hyperechoic mass
  • Core biopsy: foamy macrophages and fat globules

(a) Dx
(b) Tx

A

(a) Fat necrosis = benign
- associated w/ prior breast surgery: reduction/reconstruction
- give away is the biopsy

(b) Tx = reassurance and f/u

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2
Q

Tx of uterine atony

A

First: bimanual massage and oxytocin

Then uterotonic meds

  • methylergonovine (if no h/o HTN) b/c vasoconstricts
  • carbopost (if no h/o asthma)
  • misoprostol
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3
Q

Normal pH of vaginal secretions

A

3.8-4.5

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4
Q

Congenital rubella syndrome triad

A

Deafness, cataracts, cardiac defect = congenital rubella

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5
Q

When to give bethamethasone

A

Immature fetus can benefit from bethamethasone if given btwn 24-34 weeks
-also takes 24-48 hrs to take full effect => wouldn’t give to fetus that is urgently getting delivered

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6
Q

How finding of malignant features changes workup of an ovarian cyst

A

Changes workup if CA-125 is not elevated, if CA-125 is elevated you automatically do CT scan or met disease exploratory surgery anyway

CA-125 not elevated, if don’t have any malignant features, can observe w/ serial CA-125 and US

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7
Q

Mammary Paget disease

A

Mammary Paget disease = painful, ithcy, eczematous +/- ulcerating rash on nipple that spreads to areola

-85% have underlying malignancy (adenocarcinoma)

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8
Q

How to differenate fat necrosis vs. breast cancer

A

Need biopsy

Fat necrosis- will see fat globules and foamy histiocytes (macrophages).

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9
Q

25 yo nulligravid p/w pelvic and lower sacral back pain x1 yr, intensifies before menstruation

  • unimproved w/ ibuprophen/OCPs
  • PE: fornix tenderness, decreased uterine motility, thickening of uterosacral lig

Dx and Mgmt

A

Dx = endometriosis- chronic pelvic pain

Next step = laproscopy = direct visualization, biopsy, and removal of endometrial lesions
-indicated when conservative tx (NSAIDs/OCPs) fail

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10
Q

Contraindications to breast feeding

A

Active Tb, maternal HIV, herpetic lesions, varicella less than 5 days before or 2 days after delivery

  • chemo/radiation
  • active substance use (EtOH, drugs)**

-NOT HEP C

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11
Q

Describe the 5 parts of the BPP

  1. NST
  2. Amniotic fluid volume
  3. Fetal breathing movement
  4. fetal movement
  5. fetal tone
A

BPP: get 2 pts for each, 2 accels

(2) Amniotic fluid volume- single fluid pocket > 2x1cm or amniotic fluid index over 5
(3) 1+ breathing episode for 30+ seconds
(4) 3+ general body movements
(5) 1+ episodes of flexion/extension of fetal limbs or spine

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12
Q

Fetal US shows anterior placenta covering the cervical os and amniotic fluid index under 1.5 with single fluid pocket of 1.5x1cm

  • 4 episodes of fetal mov’t
  • 2 extension/flexion events
  • nonreactive NST
  • no fetal breathing

Calculate the BPP

A

BPP:

(1) 0 pts for nonreactive NST
(2) Oligohydramnios- want amniotic fluid index over 5 => 0 for amniotic fluid volume
(3) no breathing episodes => 0 for breathing episode (want 1+ for 30+ seconds)
(4) 2 pts for 3+ general body movements
(5) 2 pts for 1+ flexion/extension

= 4/10 = indicates fetal hypoxia 2/2 placental dysfunction/insufficiency

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13
Q

34 yo F at 32 weeks gestation p/w intense itching especially on soles of feet

  • negative hepatitis panel
  • elevated total bile acids, AST/ALT, D. bili

Dx

A

Intrahepatic cholestasis of pregnancy = functional d/o of bile formation

  • presents w/ intense pruritis, 10% present w/ jaundice
  • dx of exclusion
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14
Q

Clomiphene citrate

(a) Mechanism
(b) Indication

A

SERM = selective estrogen receptor modulator prescribed to induce ovulation
-pro-fertility agent to reverse anovaulation (ex: PCOS) or oligoovulation

Acts as estrogen analog to increase GnRH (and therefore FSH) release to stimulate ovulation

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15
Q

Presentation of HELLP syndrome

A

HELLP = Hemolytic anemia w/ Elevated Liver enzymes and Low Plts

-preeclampsia, nausea/vom, RUQ pain

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16
Q

Describe 3 changes in the BMP seen in pregnancy

A
  1. Decreased BUN
  2. Decrease creatinine
    ^both 2/2 increased GRD
  3. Mild hyponatremia 2/2 increase in ADH release
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17
Q

Triad of congenital toxo

A

Chorioretinitis, hydrocephalus, intracranial calcifications

-big give away is intracranial calcifications = toxo

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18
Q

When is GBS testing performed

A

Test results are valid for about 5 weeks => perform at 35-37 weeks

-purpose is to identify mothers who need ppx abx to prevent transmission

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19
Q

Signs of IUFD

A

Signs of intrauterine fetal demise (death of fetus after 20 weeks)

  • disappearance of fetal movement
  • decrease or stagnation in uterine size
  • fetal heart sounds no longer present

Not beta-hCG decline- b/c remains elevated as placenta is still in tact

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20
Q

Timeline for giving RhoGAM

A

Up to 72 hrs after delivery

-so if it’s an emergency and mother starts bleeding you can wait and deal w/ other stuff first

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21
Q

RF for vasa previa

A

Placenta previa in 2nd T that resolves in the 3rd- b/c possibly leaves vessels over the internal cervical os

Recall: vasa previa = fetal vessels transverse the membranes over the internal cervical os

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22
Q

Presenation of vasa previa

A

Painless vaginal bleeding w/ ROM
+
Fetal deterioration: sinusoidal waveform or bradycardia

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23
Q

Differentiate fibrocystic changes and fibroadenoma

A

Both are cyclic changes in breast tissue causing premenstrual tenderness

Fibrocystic changes = multiple diffuse nodulocystic masses
Firboadenoma = solitary nodule

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24
Q

Why do we screen for bacturia in pregnant ladies?

(a) When is the screening?

A

B/c pregnant F are more likely to have asymptomatic bacturia which can => cystitis, low fetal birth weight, pyelo, preterm birth, increased perinatal mortality

(a) Screen w/ clean-catch UA at 12-16 wks

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25
Q

How to prevent vertical transmission of HIV

A

Maternal combination (triple drug) tx + neonatal Zidovudine reduces perineal HIV transmission to under 1%

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26
Q

First step to work up a nonreactive fetal stress test

A

First thing is to let the test go on longer, test is only 20 minutes but fetal sleep cycle can be up to 40 mins => extend test to 40-120 minutes to ensure fetus is not sleepping

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27
Q

Most common symptom of neisseria gonorrhoeae

A 
Usually asymptomatic (over 50%), if symptoms = cervicitis
-mucopurulent discharge w/ friable and easily bleeding cervix
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28
Q

What a BPP of 2/10 tells you

A

BPP tells you about the FUNCTION of the placenta (not location)

BPP under 4/10 indicates fetal hypoxia 2/2 placental insufficiency/dysfunction

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29
Q

Explain why pregnancy is a prothrombic state

A
  • decrease protein S activity

- increase in fibrinogen and cogulation factors

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30
Q

Describe management if pt presents at 37 and 5/7 w/ vaginal spotting
-on exam visualize placental tissue over the internal cervical os

A

Dx = placenta previa

Mgmt = C-section, vaginal delivery would require placenta to be delivered before the fetus => deprive fetus of O2

-first step would NOT be rhogam, you can give that later!

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31
Q

Describe a reactive fetal nonstress test

A

3 components for a fetal nonstress test (track HR for 20 mins) to be considered ‘reactive’- aka reassuring or good negative predictive value to r/o fetal hypoxia

  1. baseline HR 110-160
  2. moderate variability: 6-25/min
  3. 2 or more accels w/in 20 mins, each peaking about 15/min above baseline and lasting over 15 sec
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32
Q

NST on a premature fetus

-Describe and explain findings

A

Premature fetus will have no accels on NST b/c the fetal sympathetic nervous system doesn’t develop until 26-28 weeks

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33
Q

Presentation of placental abruption

A

Sudden onset bleeding, abdominal pain, hypertonic/tender uterus, tachysystole (frequent contractions)

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34
Q

Differentiate presentation of vasa previa and placenta previa

A 
Vasa previa (fetal vessels transverse membranes overthe internal cervical os)- presents w/ painless vaginal bleeding and fetal deterioration 
-so see FHR decompensate (tachy --> brady or sinusoidal), while maternal VS remain stable

Placenta previa- bleeding is maternal in origin => you see maternal instead of fetal deterioration

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35
Q

Differentiate active vs. latent labor?

A

Labor split into 3 stages: dilation of cervix, delivery of baby, delivery of placenta

Dilation of cervix is split into

  1. latent = 0 to 6 cm
  2. active = 6 to 10 cm
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36
Q

Malignant features of an ovarian cyst

A

Solid mass, large size, thick septations, loculations

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37
Q

Describe vaginal discharge/inflammation seen in

(a) Bacterial vaginosis
(b) Trichomoniasis
(c) Candida vaginosis

A

Type of vaginal discharge/inflammation

(a) Bacterial vaginosis- thin, off white d/c w/ fishy odor
- no vaginal inflammation

(b) Trich- thin yellow/green malodorous frothy d/c
+vaginal inflammation

(c) Cadida- thick ‘cottage cheese’ d/c
+vaginal inflammation

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38
Q

62 yo nulligravid F w/ right adnexal enlargement
-US reveals 5cm r. ovarian cyst

First step in dx

A

Evaluating adenexal mass in postmeno F- first step is measure CA-125
-dont measure CA-125 in premenopausal b/c can be elevated for tons of other reasons (fibroids etc)

Then tx depends on CA-125
If elevated => CT scan or met disease exploratory surgery

CA-125 not elevated- see if malignant features of ultrasound

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39
Q

40 yo G5P0040 at 35 weeks p/w no fetal mov’t x24hr, NST for 1 hr shows no accels, US at 32 wks showed fetus in breech w/ placenta previa

Next step in management?

A

BPP (biophysical profile)

After nonreactive NST- do BPP or CST (contraction stimulation test) to determine if C-section is indicated
-in this case there is placenta previa => CST is contraindicated

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40
Q

How to differentiate fetal head compression vs. umbilical cord compression on fetal stress test

A

Fetal head compression causes fetal autonomic response to the alteration in ICP caused by contractions => get early decels
-shallow decrease in FHR that occurs w/ contractions

Cord compression causes variable decels
-abrupt drops in FHR ranging in depth/duration

41
Q

23 yo at 38 weeks gestation presents w/ ROM at 2cm dilated, -1 station.

  • 8cm dilation and 0 station over next 5 hrs
  • over next 3 hrs: no change in cervical dilation or fetal descent
  • contractions are adequate
  • NST reactive

Next step?

A

Close observation for 1 more hour- by definition this pt is in protracted labor (slower than expected progress)

Not yet in arrested labor (after which you’d do C-section) b/c arrested labor = dilation over 6cm w/ ROM + either

  • no cervical change for 6+ hrs w/ inadequate contractions
  • no cervical change for 4+ despite adequate contractions
42
Q

Clinical presentation of ruptured hepatic adenoma

A

Intraabdominal bleeding w/ peritoneal signs (rebound/guarding) and hypotension (2/2 acute blood loss)

43
Q

Mother smokes- can she BF?

A

Not an absolute contraindication (EtOH and drug use is tho)

-but smoking and BF does increase risk of SCID and infant respiratory allergies

44
Q

Tx for pt w/ PCOS who wants to get pregnant

A

Metformin- independently shown to improve ovulation

Clomiphene citrate = SERM (estrogen analogue) to induce ovulation

45
Q

Contraindication to BF from infant

A

Only one is galactosemia

all others come from the mother- active infxn, substance use

46
Q

When is C-section indicated in HIV+ mother

A

Only if viral load is under 1,000 copies

-so if mother is HIV+ w/ viral load under 1,000 there is no increased risk of transmission from vaginal delivery

47
Q

Presentation of placenta previa

A

Painless vaginal bleeding

-confirm w/ US

48
Q

27 yo w/ h/o PID p/w infertility

Key step in assessment

A

Assess fallopian tube patency w/ hysterosalpingogram

-assessing for tubar scarring/obstruction

49
Q

When is RhoGAM given?

A

To Rh (-) mother first at 28-32 weeks, then again within 72 hrs of labor (or induced abortion, or abnormal vaginal bleeding etc) `

50
Q

Mother w/ hep C- can she breast feed?

A

Yes! Never been demonstrated to be transmitted thru breast milk

  • strongly encourage BF
  • only stop if nipples are cracked or bleeding
51
Q

Etiology of premature ovarian failure

A

Most commonly idiopathic
-mumps, oophoritis, irradiation, chemo

2/2 accelerated follicular atresia or low number of initial primordial follicles

52
Q

5 parts of the biophysical profile

A

BPP: 8 out of 10 is considered normal and suggests fetus is not hypoxic (well oxygenated)

2 pts for each

  1. NST
  2. Amniotic fluid volume
  3. Fetal breathing movement
  4. fetal movement
  5. fetal tone
53
Q

Pregnant mother w/ new onset hirsuitism and acne
-US: bilateral solid 7cm cysts in both ovaries

Dx
Mgmt

A

Pregnancy luteomas and theca luteum cysts are the most common causes of hyperandrogenism in pregnancy

Both benign, luteomas more likely than tehca luteum cysts to cause fetal virilization

Both likely to spontaneously regress, watch and wait

54
Q

What is a bloody show?

A

Small amount of blood or blood-tinged mucus that comes out the vagina right before or at the beginning of labor
-freeing mucus and blood that occupied the cervical galnds or cervical os as the cervix changes shape

55
Q

24 yo G2P1 p/w routine clean-catch UA with 120k colonies of E. Coli

Dx
Tx

A

Dx = Asymptomatic bacturia
-treat this in pregnant ladies b/c can => cystitis, pyelo, low birth wt, preterm bith, increased perinatal mortality

Tx:
Nitrofurantoin 5-7 days
Amox (or augmentin) 3-7 days
Fosfomycin single dose

Recall Batrim containdicated in pregnancy

56
Q

Differentiate protracted from arrested labor

Differentiate management

A

Both describing the first stage of labor (0 to 10cm dilation of cervix)

Protracted = slower than expected progress, watch and wait, act if persists to arrested

Arrested = dilation over 6cm w/ ROM + either
-no cervical change for 4+ hrs despite adequate contractions
-no cervical change for 6+ hrs w/ inadequate contractions
Mgmt = C-section

57
Q

Next step after NST is nonreactive for 90 minutes

A

Nonreactive stress test- high false positive rate => C-section is only indicated if BPP (biophysical profile) or CST (contraction stimulation test) is also abnormal)

58
Q

Slide prep of

(a) BV
(b) Trich
(c) Candida vaginitis

A

Slide prep findings

(a) BV- Clue cells
+Whiff test- amine odor w/ KOH

(b) Trich- motile trichomonads
(c) Candida- pseudohyphae

59
Q

Presentation of uterine rupture

A

Sudden onset vaginal bleeding w/ abdominal pain

  • cessation of uterine contractions
  • loss of fetal station
  • fetal deterioriation
60
Q

What is adenomyosis?

A

Ectopic endometrial tissue in the myometrium (endometrial galnds in the uterine muscle)

61
Q

Changes in the following during pregnancy

(a) Cardiac output
(b) HR

A

Blood volume increases, SVR decreases => increase in HR and CO

62
Q

When is the quad screen done?

A

15-20 wks

63
Q

Ddx for abnormal pH of vaginal secretions

A

Bacterial vagnosis and trich have vaginal secretions over 4.5

64
Q

Tx for

(a) BV
(b) Trich
(c) Candida vaginitis

A

Tx for

(a) BV- metronidazole or clindamycin
(b) Trich- metronidazole for pt and partner
(c) Fluconazole

65
Q

26 yo G2P2 6 hrs s/p NSVD w/ epidural presents w/ continuous dribbling of urine and fullness/tenderness above the pubic symphysis on exam

Dx
Mgmt

A

Dx = pospartum urinary retention w/ overflow incontinence
-RF include nulliparity, prolonged labor, epidural anesthesia

Mgmt = insert urinary catheter (diagnostic and therapeutic)
-can’t watch and wait b/c don’t want to allow overdistention of the bladder
=> can damage detreusor or cause bladder wall ischemia

66
Q

Tx of Graves’ disease during pregnancy

A

Preferred drug for hyperthryoid during 2nd/3rd T = Methimazole

67
Q

Explain CBC changes seen in pregnancy

A

Diluational anemia 2/2 increase in plasma volume w/ smaller increase in RBC mass

68
Q

Risk factors for placenta previa

A

Maternal age over 35, multiparity

69
Q

Define premature ovarian failure

A

Amenorrhea (3+ mo), hypoestrogenism, elevated gonadotropic hormones in female under 40 yoa

70
Q

How ultrasound can be used to differentiate uterine atony and retained placental parts as a cause of postpartum hemorrhage

A

Ultrasound to look at the endometrial stripe

-thin endometrial stripe suggests empty and normal uterine cavity

71
Q

24 yo at 28 wks gestation presents for absence of fetal cardiac activity x2 wks
-low serum fibrinogen, thrombocytopenia, prolonged PT/PTT

(a) Dx
(b) Next best step

A

(a) IUFD = intrauterine fetal demise = death of fetus in utero after 20 wks
Retention of dead fetus can => chronic consumptive coagulopathy

(b) If any coagulation derangement is suspected- tx is delivery w/o delay
- dont need to give FFP transfusion first bc expected that abnormalities will resolve after birth of retained parts

72
Q

RF for cervical insufficiency

A

Cervical LEEP or cone biopsy
DES exposure
Multiple gestation, h/o preterm birth, or 2nd trimester pregnancy loss

73
Q

Pt p/w “closed cervix appearing shorter than normal”

Next step in management

A

Transvaginal ultrasound = gold standard diagnostic test for cervix incompetence

74
Q

Why is early diagnosis of premature ovarian failure important?

A

Prevent osteoporosis at a young age

Early dx- why criteria is only 3 mo (instead of a year) of amenorrhea

75
Q

27 yo G2P1 at 19 weeks gestation p/w N/V/RLQ pain

  • febrile to 100.4, WBC 16k
  • tenderness and guarding in RLQ

Dx and mgmt

A

Acute appendicitis- first step is abdominal ultrasound

NOT CT (umm pregnancy and radiation is a no no)

76
Q

73 yo F p/w foul smelling bloody vaginal d/c for several mo, 40 pack yr smoker
PE: irregular lesion of the upper 1/3 of the posterior vaginal wall

Next step?

A

Dx w/ biopsy- most likely squamous cell carcinoma of the vagina

Vaginal cancers

  • squamous cell: over age 60, associated w/ smoking, upper 1/3 of posterior vaginal wall
  • Clear cell: under 20 yoa, inutero DES exposure, upper 1/3 of anterior vaginal wall
77
Q

Etiologies of IUFD

A

Intrauterine fetal demise (death of fetus after 20 weeks)

  • diabetes, hypertensive d/o of mother
  • antiphospholipid syndrome
  • luteal phase defect in mother
  • infections: TORCH or listeriosis
78
Q

What is vasa previa?

How does it present?

A

Vasa previa = fetal vessels transverse the membranes over the internal cervical os
=> p/w painless vaginal bleeding w/ ROM and fetal deterioriation (tachy then brady or sinusoidal) while mothers VS remain stable

79
Q

27 yo G1P0 at 28 weeks p/w lack of fetal movement x48 hrs

Next step in management

A

Real-time sono

  • to demonstrate absence of fetal movement and cardiac activity
  • aka to rule in/out IUFD (intrauterine fetal demise)
80
Q

Differentiate dermoid cyst from hydrosalpinx findings on US

A

Dermoid cyst on US = hyperechoic/calcified mass in ovary

Hydrosalpinx = mass separate from the ovary

81
Q

Risk factors for impaired oocyte transport => infertility

A

Previous PID or endometriosis

82
Q

Define dysparenuria

A

Painful or difficult sexual intercourse

83
Q

25 yo w/ endometriosis is at greatest risk for developing what?

A

Infertility

-resection of endometriosis improves conception rate

84
Q

40 yo G2P1 at 10 wks gestation
-cousin w/ Downs and wants to know her risk

Next best step

A

Order plasma cell-free fetal DNA testing = cffDNA can be ordered anytime 10+ wks gestation, graet sensitivity and specificity for trisomy (21, 18, 15)

If abnormal- confirm results w/ CVS (10-12 wks) or amniocentesis (15-20 wks)

85
Q

What is tachysystole?

A

Abnormal or excessive uterine contractions that impair blood flow and oxygen delivery to the fetus

ex: if give oxytocin to already appropriately contracting mother

86
Q

Why do we not use the following to tx UTI in pregnancy

(a) Fluoroquinolones
(b) Bactrim

A

(a) Fluoroquinolones increase risk of fetal cartilage abnormalities
(b) Bactrim relatively contraindicated in 1st and 3rd T b/c of increased risk of neonatal kernicterus

87
Q

Describe ABG changes seen in pregnancy

A

Chronic respiratory alkalosis (low pCO2) w/ metabolic compensation (kidney excretes bicarb)
-due to progesterone’s direct stimulation of the central respiratory centers to increase TV and minute ventilation

88
Q

Ultrasound appearance of a mature teratoma

A

Mature teratoma = Dermoid cyst

Calcification and hyperechoic nodule on ultrasound

89
Q

When you can do amnio and CVS

A

Amnio 15-20 wks (same time when quad screen done)- second trimester

Chorionic villi sampling- earlier, 10-12 wks

90
Q

Tx for HELLP

A

Microangiopathic hemolytic anemia and elevated liver enzymes w/ low plts

  1. Delivery the child
  2. Mg for seizure ppx
  3. Antihypertensive meds
91
Q

Define IUFD

A

IUFD = intrauterine fetal demise = death of fetus after 20 weeks

92
Q

23 yo at 38 wks gestation presents w/ ROM at 2cm dilated, 01 station

  • next 5 hrs: 8cm dilated and 0 station
  • next 3 hrs: no change in cervical dilation or fetal descent
  • IUPC shows adequate contractions
  • NST

Role of oxytocin in her management?

A

Wouldn’t help- she’s having normal contractions (IUPS showing contractions w/ montevideo units over 200)

-oxytocin would only put her at risk for tachysystole

93
Q

27 yo nulliparious p/w intermittent l. pelvic pain x8 mo

  • exacerbated by exercise
  • stopped OCPs 2 yrs ago to have child w/ husband
  • PE: normal sized uterus w/ enlarged left adnexa
  • US: homogeneous cystic-appearing mass on left ovary

Dx

A

Endometriosis

  • chronic (6+ mo) pelvic pain in reproductive age F
  • noncyclic pain exacerbated by exercise
  • fixed immobile uterus, adenexal mass
  • cyst suggestive of ovarian endometrioma
  • common consequence = inferility
94
Q

53 yo G2P2 F p/w r. sided pelvic pain w/ bloating x3 mo, h/o chlamydia in 40s
-pelvic US: r. ovarian mass w/ thick septations and moderate periotneal fluid

Dx

A

Dx = ovarian carcinoma

-septations and ascites suggestive of malignancy

95
Q

What is a dermoid cyst?

A

Dermoid cyst = mature cystic teratoma = benign ovarian tumor from ectodermal cells

-appears hyperechoic/calcified on US

96
Q

Presentation of congenital syphilis in baby

A

Syphilis = intermittent fever, osteitis (bony inflammation), mucocutaneous lesions

97
Q

Ultrasound findings of a uterine mass suggestive of cancer

A
  • solid mass
  • thick septations
  • peritoneal free fluid (ascites)
98
Q

What is a contraction stimulation test

A

Administer oxytocin or nipple stimulation until 3 contractions occur q10 min

99
Q

Mechanism of consumptive coagulopathy in retention of dead fetus

A

Gradual release of tissue factor (thromboplastin) from the placenta into maternal circulation

OB/GYN (10 decks)

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