Obstetrics and Gynecology Flashcards
Spontaneous abortion : definition (timeline) ?
types (6) ?
pregnancy loss <20 weeks
threatened
inevitable
incomplete
complete
missed
septic
DDx of spontaneous abortion (5)
Cervical abnormality
Ectopic
Infection
Molar Pregnancy
Subchorionic hemorrhage
When and how much Anti-D (WinRho) to give?
In SA :
120IM if <12wks
300IM if >12wks
N Pregnancy :
at 28 weeks
+ 72h PP if BB is Rh+
Risk factors for spontaneous abortions
Advanced maternal age
Thrombophilia, lupus (antiphosphilipid antibody syn)
Infections (TORCH)
Previous SA
Conception before 6mo after last
IUD
Uterine abnormalities
Misoprostol, retinoids, MTX, NSAIDs
Habits
Medication for spontaneous abortion? For medical abortion?
Spontaneous : Misoprostol 800mcg vaginally + 24-72h if no bleeding
Medical : Mifepristone 200mg PO then Misoprostol 800mcg PO in 24-48h
Differentiate threatened, inevitable, incomplete, complete, missed and septic abortions
threatened : soft and closed cervix
inevitable: open and dilated cervix
incomplete : open cervix
complete : open and dilated cervix
missed : closed cervix, fetal demise w/o uterine activity (no bleed)
septic abortions : SA + uterine infx (SIRS)
What antibiotics to give in a septic abortion?
Gentamicin + Clindamycin
Prescribe a medical abortion.
Day 1 : Mifepristone 200mg PO
- progesterone receptor antagonist = decr proga action and cessation of pregnancy
Day 2 or 3: Misoprostol 800mcg + 2nd dose 3-6h later if 9+0 - 12+0 weeks
- synthetic prostaglandin causing expulsion
Give 4 obstetrical DDx for 3rd trimester vaginal bleeding
Placenta Previa (accreta, increta or percreta) : low lying placenta <2cm from os) : PP is POORLY POSITIONED PLACENTA and is PAINLESS (can bleed spontaneously or w/ cervical change)
Placenta Abruption (total vs partial) : separation of maternal vessels : PA is AWFUL (PAINFUL)
Bloody Show : effaced+dialated cervix = mucus plug passes
Vasa Previa : fetal vessels run along os (70% mortality) : VP is VESSELS are POORLY POSITIONED and is PAINLESS (bleeds after membrane rupture)
Placenta previa definition, presentation and risk factors
Definition: placenta is positioned low in the uterus and partially or completely covers the internal cervical os (the opening to the cervix).
Bleeding: painless vaginal bleeding and can occur in the third trimester as the cervix starts to thin and dilate, disrupting placental attachment.
Risk Factors: prior C-sections, advanced maternal age, multiple pregnancies, or uterine scarring.
Mnemonic: PP is POOR POSITIONED PLACENTA and is PAINLESS
Vasa Previa definition, presentation, risk factors and management
Definition: fetal blood vessels run through the membranes covering the internal cervical os, without being protected by the umbilical cord or placenta.
Bleeding: Can lead to significant, life-threatening bleeding for the fetus if vessels rupture. Typically associated with a sudden onset of painless vaginal bleeding right AFTER membrane rupture.
Risk Factors: velamentous cord insertion or succenturiate lobes of the placenta.
Mnemonic: Think “Vasa” for “Vessels” (fetal vessels lying unprotected).
Management : Apt test (pink=+=fetal blood=bad=urgent c/s)
Placental Abruption definition, presentation, risk factors and management
Definition : separation of maternal vessels (partial or complete)
Bleeding : painful bleeding, abdo/pack pain, incr uterine tone, non-reassuring FHR
Risk Factors : PPROM, multiparity, previous abruption, HTN, DM2, thrombophilia, drugs, fibroids
Management : Kleihauer-Betke test, ABC, IVF, monitor for DIC, monitor preterms, induce VD in stable terms, and c/s in unstable pts
Definite Antiphospholipid Antibody Syndrome (APLA/APS)
APS is an autoimmune disorder where the immune system produces antiphospholipid antibodies (aPL) that mistakenly target proteins associated with phospholipids (fat molecules) in cell membranes, especially on blood vessel walls. This immune reaction increases the tendency for abnormal blood clotting (thrombosis).
APS diagnostic criteria
Need 1 Clinical Criteria:
* Vascular Thrombosis: Documented episodes of blood clots, either venous (e.g., deep vein thrombosis or DVT) or arterial (e.g., stroke, myocardial infarction).
- Pregnancy Complications:
– ≥1 unexplained fetal deaths >10wks
– Premature birth >34wks due to preeclampsia, eclampsia, or placental insufficiency
– ≥3 unexplained, consecutive miscarriages >10wks
Need 1 Laboratory Criteria (+ x 2 at least 12 weeks apart):
- Presence of lupus anticoagulant.
- Elevated anticardiolipin antibodies (IgG or IgM).
- Elevated anti-β2-glycoprotein I antibodies (IgG or IgM).
Treatment of APS patients (non-pregnant and pregnant).
Pregnant : LMWH + ASA
Non-pregnant : Warfarin + ASA
APS causes low or high platelettes?
Low (paradoxically as APS causes clots!)
Describe physiological discharge. When does it increase?
1-4mL fluid/24hrs, white / transparent, thick, odourless
increases with pregnancy, ovulation, OCPs
Provide DDx for vaginitis
- Bacterial vaginosis**most common
- Trichomoniasis
- Candidiasis
- Chlamydia
- Gonorrhea
- Lichen Sclerosis
- Vulvar Cancer
- Vaginal Atrophy
PROM vs PPROM
Premature rupture (after 37wks, before labor)
Preterm Premature rupture (before 37wks)
Vaginosis vs Trichomoniasis vs Candidiasis presentation
Vaginosis (BV) : asx vs fishy, white/grey thin d/c
Trich : pruritis, dysuria, white/yellow frothy d/c, straberry cervix, erythema of the vulva
Candidiasis : asx vs pruritis, dysuria, dyspareunia, white clumpy curdy d/c, erythema + edema of vagina
Treatments for BV, Trich, Candida
BV : Metronidazole 500mg PO BID x 7d (ok in 3rd trimester otherwise use 0.75% 5g PV cream x5d) or Clinda 2%cream 5g PV HS x7d
or Metro 2gx1
or Clinda 300mg BID
Trich : Metronidazole 500mg PO BID x 7d
AND TX MALES : 2g x 1
Candida : Clotrimazole 200mg PV x 3d or 2% cream x3d
or Miconazole 400mg PV x 3d or 4% x 3d
or Fluconazole 150mg PO x 1
**if reccurent ≥4x/y : Fluco 150mg PO q3d x 3 doses, topical azole x 10-14d then treat for 3-6mo w/ Fluc 150mg PO q1wk
Chlamydia vs Gono Treatment
Chalm : Azithro 1gx1 (ok if pregnant) or Doxy 100mg BIDx7d or Erythro 2g/dx7d or Amox 500mg TIDx7d (ok if preg)
** no test of cure unless prepubertal 3-4wks, but repeat screen in 3-6mo
Gono : Azithro 1gx1 AND Ceftriaxone 250mg IMx1
if allergic to cephalos : Axithro 2gx1
if tx failure : Azithro 2gx1 and Ceftri 1g IM x1
**think CEFtri for SAFEsex
Treatment for vaginal lichen sclerosis
Clobetasol
Treatment for vaginal atrophy
Lifestyle : no smoking, regular sex
Topical : Replens, lubes
Estrogen :
- Premarin cream 0.625mg qHS x 2wks then q2-3d x6mo
- Estring q3mo
- Vagifem tablets 1tab PV HS x 2wks then 2/wk
What are common non-pharmacologic treatments for dysmenorrhea?
Heat application, regular exercise, dietary adjustments (such as reducing caffeine ortaking ginger 750-2000mgdays 1-4 of menses), and acupuncture.
Name two classes of medications commonly used to manage dysmenorrhea.
NSAIDs (e.g., ibuprofen) and hormonal contraceptives (e.g., oral contraceptive pills).
Why are NSAIDs effective for primary dysmenorrhea?
NSAIDs reduce prostaglandin production, which helps decrease uterine contractions and pain.
How do combined oral contraceptives help in managing dysmenorrhea?
They reduce the volume of menstrual flow and lower endometrial prostaglandin production, decreasing pain.
Name (at least) 3 causes of secondary dysmenorrhea?
Endometriosis, adenomyosis, fibroids, pelvic inflammatory disease, and intrauterine devices (IUDs).
When should you suspect secondary dysmenorrhea?
When menstrual pain begins later in life, worsens over time, or is associated with other symptoms like heavy bleeding or pain outside of menstruation.
How much blood loss defines menorrhagia?
Menorrhagia is defined as menstrual blood loss of more than 80 mL per cycle or periods lasting more than 7 days.
List some common causes of menorrhagia.
Causes include hormonal imbalances, uterine fibroids, polyps, adenomyosis, bleeding disorders, thyroid disorders, and malignancies.
What surgical options exist for menorrhagia or dysmenorrhea if conservative treatments fail?
Options include endometrial ablation, uterine artery embolization, and hysterectomy.
If fertility is wanted for dysmenorrhea, consider : uterine nerve ablation or presacral neurectomy
What are common symptoms of endometriosis?
Symptoms include chronic pelvic pain, dysmenorrhea, dyspareunia (pain during intercourse), dyschezia (painful bowel movements), and infertility.
Which sites are most commonly affected by endometriosis?
Common sites include the ovaries, fallopian tubes, pelvic peritoneum, and, less frequently, the bladder, intestines, and rectum.
What is the leading theory for the cause of endometriosis?
The retrograde menstruation theory suggests that menstrual blood flows backward through the fallopian tubes into the pelvis, depositing endometrial cells that implant and grow.
How is endometriosis diagnosed?
GOLD STANDARD
Definitive diagnosis requires laparoscopy with biopsy, but it can be suspected based on symptoms and imaging, especially transvaginal ultrasound.