Obstetrics Flashcards
3 most important investigations at the booking visit?
Blood pressure, dipstick, BMI
When is the booking visit?
8-10w
3 infectious diseases screened at the booking visit
Hep B, HIV, Syphilis
When is the dating scane
10 - 13+6 weeks
When is the anomaly scan
18-20+6w
When are the first and second doses of anti-d given
28w and 34w
When does hcg start to be secreted and what is it secreted by
day 8 by the syncytiotrophoblast
6 people who need high dose folic acid
what is the dose
5mg
previous child with NTD
DM
BMI above 30
Antiepileptic medication
HIV +ve
Sickle cell
Quadruple tests for downs
is PAPPA raised or reduced
DOWNS
Reduced AFP
Reduced Oestriol
Increased hcg
Increased inhibin A
Reduced PAPPA
Quadruple test for edwards
EDWARDS
Reduced AFO
Reduced Oestriol
Reduced hcg
Stable Inhibin A
First line investigation for gestational diabetes
OGGT at 28w
When do you get your first OGGT if you have a pmhx of gestational diabetes
soon after booking
Cut of levels for FASTING glucose and 2-HOUR glucose
Fasting 5.6
2-Hour 7.8
When would you immediately start insulin
If the fasting glucose is above 7
First line investigation if chicken pox exposure in pregnancy
Check antibodies
Treatment if negative antibodies and chicken pox exposure
1 dose of VZ Ig
Over 20w and present in 48hrs - oral aciclovir
What happens to urea, creatinine and hb in normal pregnancy
ALL REDUCED
Increased AFP can indicate what
Abdominal wall defects
2 normal changes to urine in pregnancy
Increased urinary protein loss and glucose
painless PV bleed at 6-9w
threatened miscarriage
light PV bleed and pregnancy sx disappear
missed (delayed) miscarriage
heavy bleed and crampy abdominal pain in early pregnancy
Incomplete inevitable miscarriage
light bleeding in early pregnancy
Complete inevitable miscarriage
shoulder tip pain and cervical excitation
Ectopic Pregnancy
Sequale of ectopics
Abdo pain then PV bleed
why is T4 raised in a molar pregnancy
hCG mimics TSH
constant lower abdo pain with a WOODY abdomen on examination, disproportionate shock and distressed foetal heart rate
placental abruption
increasing age, increasing parity, trauma, cocaine and polyhydramnios are all risk factors for what
placental abruption
what condition can progress to DIC
placental abruption
painless PV bleeding and shock in proportion to blood loss
placenta praevia
gold standard investigation for placenta praevia
transvaginal ultrasound
when would you refer for lack of foetal movements
24w
management of a low lying placenta found on the anomaly scan
rescan at 32w
Sequale of vasa praevia
ROM followed immediately by PV bleeding and foetal bradycardia
explain the difference between placenta accreta, increta and percreta
Accreta: chorionic villi attach to myometrium
Increta: chorionic villi into the myometrium
Percreta: chorionic villi into perimetrium
when can gestational hypertension be diagnosed
after 20 weeks
management of a lady with bp of 160/110
admit regardless of proteinuria
Define pre-eclampsia
new onset blood pressure above 140/90 AND proteinuria OR organ dysfunction
age above 40, renal disease, multiples, BMI above 40 and HTN increase the risk of what
pre eclampsia
management of women with SLE/antiphospholipid
75mg aspirin daily to prevent pre-eclampsia
management of eclampsia
MAGNESIUM SULPHAE until 24 hours post delivery/last seizure
increased liver and enzymes and jaundice
acute fatty liver
uterine tenderness and foul smelling discharge
choramnionitis
intense pruitis with RUQ pain, jaundice, steatorrhoea and increased bile acids
Intrahepatic cholestasis of pregnancy
Management of intrahepatic cholestasis of pregnancy
URSODEOXYCHOLIC ACID
induction at 37-28w as increased stillbirth risk
what is the main complication of induction
uterine hyperstimulation
sudden collapse after artificial rupture of membranes
amniotic fluid embolism
sudden collapse after artificial rupture of membranes
amniotic fluid embolism
main cause of cord prolapse
artificial rupture of membranes
management of cord prolapse
retrofill bladder with saline
minimal handling
keep cord warm and moist to reduce vasospasm
first line investigation for pprom
speculum exam for pooling of amniotic fluid in posterior vaginal vault
abx after pprom
10 day erythromycin
pyrexia above 38 during labour
risk of GBS
benzylpenicillin
observation of baby if +ve GBS?
24 hours
Explain the 4 categories of c-sections
1: Immediate threat to life, deliver in 30 min
2: Compromise, deliver in 75 min
3: Delivery needed but mum and baby stable
4: Elective
Contraindication to VBAC
classical s-section scar
define pph
blood loss of over 500ml
most common cause of pph
uterine atony
management of shoulder dystocia (5 steps)
- mcroberts: hyperflex legs on abdo & suprapubic pressure
2: woods screw: hand in vagina and turn
3: rubin: press on posterior shoulder
4: try on all 4’s
5: push head in and c-section
4 classifications of perineal tears
1st degree: tear in vaginal mucosa (no repair)
2nd degree: tear into perineal muscle (midwife suture on ward)
3rd degree: a. 50% external sphincter b. 100% external sphincter c. internal sphincter (dr repair in theatre)
4th degree: through sphincter to rectal mucosa (dr repair in theatre)
can you have a vaginal delivery if you have HIV
Yes - if the viral load is less than 50 copies/ml at 36w
can you breastfeed with HIV
NO
How much weight does a baby have to lose for referral to the midwife led breast feeding clinic
10% in first week
can you breastfeed with Hep B
YES
how would ROP present
absent red reflex
management of baby when mum is hep b positive
Ig within 12 hours
Vaccine after birth, 1m and 6m
investigation for lochia beyong 6w
Ultrasound
management of magnesium sulphate induced respiratory depression
calcium gluconate
DOAC in pregnancy?
Contraindicated - switch to LMWH
epidemiology of baby blues, postnatal depression and puerperal psychosis
baby blues 60-70%
postnatal depression 10%
puerperal psychosis 0.2%
women presents 3-7 days pp and is anxious, tearful and irritable
baby blues - reassure
women presents 1-3m pp with depressive sx
postnatal depression
management of postnatal depression
CBT
Sertraline or Paroxetine (safe in breastfeeding)
women presents 2-3w pp with severe mood swings and disordered perception
puerperal psychosis
management of postpartum thyrotoxicosis
propanolol
medication to supress lactation
carbegoline
medication that causes folic acid deficiency
phenytoin
define station
head in relation to the ischial spine
0 is directly on it
-2 2cm above and +2 is 2cm below
what do you monitor in DVT
factor xa
Indications for continuous CTG monitoring
-
Drugs that are safe and unsafe in breastfeeding