WOMENS HEALTH - OBSTETRICS AND GYNAE Flashcards
(130 cards)
MISCARRIAGE
What is the medical management of a miscarriage?
What is the follow up?
- PV/PO synthetic prostaglandin misoprostol
- Contact HCP if no bleeding in 24h
- Urinary beta-hCG 3w after to exclude ectopic or molar
HYPEREMESIS
What is the diagnostic triad for hyperemesis gravidarum?
Triad –
- >5% weight loss compared to before pregnancy
- Dehydration
- Electrolyte imbalance
ANTENATAL SCREENING
What screening is offered if the mother is too late for the combined test and when?
Triple or quadruple test 15–20w but only tests for Down’s syndrome –
- Beta-hCG
- Alpha-fetoprotein
- Oestriol
- Inhibin (quadruple)
PLACENTA PRAEVIA
What are some risk factors for placenta praevia?
- Embryos more likely to implant on lower segment scar from previous c-section
- Multiple pregnancy
- Multiparity
- Previous praevia
- Assisted conception
PLACENTAL ABRUPTION
What are the major risk factors for placental abruption?
What are some other risk factors?
- IUGR, pre-eclampsia or pre-existing HTN, maternal smoking + previous abruption
- Cocaine use, multiple pregnancy or high parity, trauma
VASA PRAEVIA
What are some risk factors for vasa praevia?
- Placenta praevia
- Multiple pregnancy
- IVF pregnancy
- Bilobed placentas
PRE-ECLAMPSIA
How can pre-eclampsia be classified?
- Mild-mod = pre-eclampsia without severe HTN (<160/110) and NO Sx, biochemical or haematological impairment
- Severe = pre-eclampsia w/ severe HTN ± Sx ± biochem ± haem impairment
- Early <34w, late >34w
PRE-ECLAMPSIA
What is the result of placental ischaemia?
- Pro-inflammatory protein + thromboplastin release leads to endothelial damage > vasoconstriction, clotting dysfunction + increased vascular permeability
- Ultimately leads to poor renal perfusion > RAAS activation > HTN, proteinuria ± oedema > pre-eclampsia + eclampsia (if continues)
PRE-ECLAMPSIA
What are the…
i) high risk
ii) moderate risk
factors for pre-eclampsia?
i) Pre-existing HTN, previous pre-eclampsia, CKD, autoimmune (SLE, T1DM)
ii) Nulliparity, multiple pregnancy, >10y pregnancy interval, FHx, >40y, BMI >35kg/m^2
PRE-ECLAMPSIA
What are the 2 main causes of symptoms in pre-eclampsia?
- Local areas of vasospasm leading to hypoperfusion
- Oedema due to increased vascular permeability + hypoproteinaemia
PRE-ECLAMPSIA
What blood investigations would you do in pre-eclampsia?
- FBC with platelets (thrombocytopenia)
- Serum uric acid levels (raised due to renal issues)
- LFTs (elevated liver enzymes ALT + AST)
PRE-ECLAMPSIA
What other investigations could you perform in pre-eclampsia?
- Proteinuria on dipstick (++ or +++ is severe)
- Protein:Creatinine ratio (PCR) ≥30ng/nmol = significant proteinuria
- Accurate dating + USS to assess foetal growth
IUGR
What are the 3 broad categories causing IUGR?
- Placental insufficiency (most common cause)
- Maternal factors
- Foetal factors
IUGR
What are some maternal causes of IUGR?
- Chronic disease (HTN, cardiac, CKD)
- Substance abuse (cocaine, alcohol) smoking, previous SGA baby
- Autoimmune
- Low socioeconomic status
- > 40
IUGR
When would you be concerned about IUGR?
What would you do?
- SFH < 10th centile, slow or static growth or crossing centiles
- Refer for serial growth scans (USS) every 2w, umbilical artery doppler + amniotic fluid volume
- MCA doppler performed after 32w
MULTIPLE PREGNANCY
What are some predisposing factors to multiple pregnancies?
- Previous twins,
FHx,
increasing parity + maternal age,
IVF,
race (Afro-Caribbean)
MULTIPLE PREGNANCY
What is the management of multiple pregnancies?
- Steroids if <34w
- Monochorionic/amniotic twins = elective c-section 32-34w
- Diamniotic twins = 37–38w, vaginal if presenting twin cephalic but may need c-section for second
OLIGOHYDRAMNIOS
What are some causes of oligohydramnios?
- PROM or SROM
- Renal agenesis (Potter’s syndrome) or non-functional kidneys
- Placental insufficiency (pre-eclampsia, post-term gestation) as blood redistributed to brain so reduced urine output
- Genetic anomalies
- Obstructive uropathy
POLYHYDRAMNIOS
What are the causes of polyhydramnios?
- Increased foetal urine production (maternal DM), twin-twin transfusion, foetal hydrops
- Foetal inability to swallow/absorb amniotic fluid (GI tract obstruction e.g. duodenal atresia, foetal neuro/muscular issues)
RHESUS DISEASE
What is the pathophysiology of rhesus disease in the first pregnancy?
- Rh-ve woman exposed to Rh+ve foetal blood, her immune system recognises as foreign + produce antibodies against rhesus D (sensitisation)
- Usually no issues in 1st pregnancy as IgM produced that cannot cross placenta
RHESUS DISEASE
What is the pathophysiology of rhesus disease in subsequent pregnancies?
- Memory cells produce IgG which can cross placenta so if Rh+ve foetus will attack leading to haemolysis (haemolytic disease of newborn) with jaundice + hydrops fetalis (abnormal accumulation of fluid)
GESTATIONAL DIABETES
What are some anti-insulin hormones produced by the placenta?
- Main one is human placental lactogen (hPL)
- Also glucagon + cortisol
INFECTIONS + PREGNANCY
What are the risks of Varicella zoster?
- Maternal risk = 5x greater risk of pneumonitis
- Foetal varicella syndrome = skin scarring, microphthalmia, limb hypoplasia, microcephaly + learning difficulties
PROM
What is the management of PPROM?
- 1st line = IM corticosteroids if foetus <34w
- Prophylactic PO erythromycin given to prevent chorioamnionitis for 10d or until labour is established if within 10d
- Consider induction at 34w (trade off)