O&G Flashcards
Herpes Mx in PregC
labour<6wks=CS aciclovir tds labour>6wks=reassure
Guidelines issued by the Royal College of Obstetricians and Gynaecologists state that women who present with first-episode genital herpes during their third trimester should be managed with daily suppressive oral aciclovir 400mg until delivery. Delivery should be by caesarean section due to a high risk of neonatal HSV (herpes simplex virus) transmission.
Headache in PregC (differentials)
Migraine-most common Viral meningitis- Cerbral vein thrombosis Subarachnoid Idiopathic intracranial hypetension
VZV infx in PregC Tx
Test for VZ Abs and give VZIG w/in 10 days
External cephalic version (Contraindications)
Offered from 36wks (37 in multiparous) Contraindications-Multiple pregnancy, Maj uterine abnorm, antepartum haemorrhage, rupture of membranes,
DM Mx postpartum
After eating and drinking ~6hrs sliding scale reduced to preprgC doses of insulin
SLE in PregC risks
Spont Miscarriage, fetal death, PET, Preterm, fetal growth restriction
Listeria trasnmission
Soft cheese and Pate
Toxoplasmosis transmission
Cats, faeces
Rashes in PrgC
Pemphigoid gestationis - Blistering of trunk, spreads from umbilicus PUPP - Abdo stretch marks and periumbilical sparing Prurigo gestationis - trunk+upper limbs abdo sparing Impetigo hepetiformis - blisting and febrile
Threatened miscarriage
PVB <24wks
Missed miscarriage
Loss of pregC w/o passage of the products of conception or PVB
Septic miscarriage
loss of PregC complicated w/ infx of the retained conceptus
Incomplete miscarriage
loss of PregC w/ PVB and passage of not all of the concptus Tx - med: misoprostol Surg: suction evacuation
Complete miscarriage
loss of PregC w/ all of products of conception expelled
Hyperemis Gravidarum
Px - Severe vomiting, dehydration, RF’s - multiple pregC Tx - fluid restoration and anti emetics
Fetal pole and fetal heart
6 wks
Blighted ovum/anembryonic pregC
Gestational sac w/o embryonic pole or yolk sac development Mx - 2 scans 10-14/7 apart
Ectopic PregC Mx med criteria (4)
Criteria: Small ectopic <3cm, no fetal pulse, no clinical compromise, no free fluid in the pouch of douglas, bHCG <3000
Med: Methotrexate IM (+/- another dose 7/7), monitor bHCG on days 4+7. Drop by 15% needed otherwise 2nd dose given
HRT risks
Inc risk of: Stroke, breat Ca, ovarian Ca, VTE, CAD
Epilepsy Mx in PregC
Carbamazepine lamotrigine
COCP
MOA - inhibits ovulation
POP
MOA - thickens cervical mucus
Desogestrel
MOA - inhibits ovulation, thickens cervical mucus
Injectable contraceptive/medoxyprogesterone acetate
Lasts how long?
MOA - inhibits ovulation, thickens cervical mucus
12wks
Implantable/etonogestrel/Implanon
MOA - inhibits ovulation, thickens cervical mucus
Lasts 3yrs
Itrauterine device
MOA - decreases sperm motility and survival
Intrauterine system/levonorgestrel
MOA - prevents endometrial proliferation, thickens cervical mucus
Levonorgestrel/Levonelle Emergency conc
MOA - Inhibits ovulation <72hrs 58% effective (24hrs 95% effective)
Ulipristal/ellaOne Emergency conc
MOA - Inhibits ovulation <120hrs effective condoms until next period
IUD Emergency conc
MOA - prevents implantation, spermicidal <5days after UPSI or expected day of ovulation
primary PPH
Def: minor 1000-500ml/maj>1000 blood loss from the genital tract w/in 24hrs Ax - 4 T’s: Tone, Tissue, Trauma, Thrombin
Fibroids
Def: benign smooth muscle tumours of the uterus, more common in black women Px - asymp, menorrhagia, lower abdo pain, bloating, urinary Sx, subfertility Ix - transvagianl US Mx - Sx Mx IUS,tranexamic acid, COCP, GnRH, myomectomy, uterine artery embolization
Menstrual cycle 6 steps
- GnRH released from hypothalamus 2. Inc FSH+LH released from ant pit. 3. FSH induces follicular growth creating oestradiol 4. Oestradiol inhibits other follicle development (only one follicle) 5. positive feedback and LH surge causing ovulation 36hrs after surge 6. Luteal phase of follicle (now corpus luteum) increases progesterone, enhancing endometrial receptivity
CMV infx in pregC Fetal effects (4)
Deafness IUGR Hydrocephalus Thrombocytopenia
DR C BRAVADO
Define risk - prev CS, PET, DM, PVB, IUGR Contractions - Baseline RAte - 110-160, tachy w/pyrexia, brady=distress Variability - 5-25, dec in fetal sleep, prolonged dec=bad Accelerations - 15 for 15s good, w/ contractions Decelerations - early/late/varied (varied=cord compression+oligohydramnios) Overall impression
Reiter’s syndrome ‘can’tx3’
Can’t see, can’t pee, can’t climb a tree conjunctivitis, urethritis, arthritis
Rise in this hormone maintains PregC if fertilized
Progesterone
Stimulates proliferation of stromal and glandular elements of endometrium
Oestradiol
3 P’s of labour
Power, passage, passenger
3 stages of labour
- From diagnosis of labour to full cervical dilation 10cm latent (<4) active (4-10) 2. From full dilation to delivery ~40mins nullips/~20mins multips 3. Delivery of fetus to delivery of placenta
Itching and derraged LFT’s esp. bile acid. Rsk=Stillbirth, preterm and meconium staining. Tx=induce @ 37-38 + Urodeoxycholic acid
Obstetric cholestasis
Ruptured membranes, Offensive pv discharge. Tx- Abx and induction of labour (removal of infx nidus)
Chorioamnionitis
Px - Severe vomiting, dehydration, RF’s - multiple pregC Tx - fluid restoration and anti emetics
Hyperemis Gravidarum
Ax - placental insufficiency Px - Microsomaly and microcephaly (head can be normal if placental insufficiency occurs later in PregC)
IUGR
Epx - under 35 Ax - 90% SCC + HPV RF: STI Px - PCB, IMB, deep dyspareunia, crampy lower abdo pain, cerval bleeding on contact Ix - Biopsy for staging Tx - surgical, chemo, radio
Cervical cancer
Def: implantation of a fertilized ovum outside of the uterus, mostly tubular Px - 6-8wks amenorrhoea, lower abdo pain, PVB, peritoneal bleeding (shoulder pain), Mx - methotrexate, or surgical
Ectopic PregC
Px - pelvic pain, fever, deep dyspareunia, discharge, menstrual irregularities, cervical excitation Tx - IMcef, po doxy, po met
Pelvic inflammatory disease
Px - sudden onset unilateral lower abdo pain, N+V, tender adnexa
Ovarian torsion
Px - chornic pelvic pain, dysmenorrhoea (pain before period), deep dyspareunia, subfertility, chocolate cyst
Endometriosis
Px - pressure/heaviness or bearing down sensation, urinary Sx i.e. incontinence, freq, urge
Urogenital prolapse
4 O’s: Obesity, O children, Oestrogen unopposed, O sugar (DM)
Endometrial Ca
Px - PVB 1st-2nd tri, uterus large for dates, hyperemesis gravidarum, snowstorm, ground glass?, inc hCG
Hydatidiform mole/molar PregC
Px - PVB 3rd tri, constant pain, signs of shock/hypovolaemia, woody uterus
Placental abruption
Px - PVB 3rd tri, no pain, non tender uterus, no BV
Placenta praevia
Ax - fetal bld vessels runs directly in front of presenting part Px - rupture of membranes followed immediately by large PVB, severe fetal distress, CS often not fast enough to save fetus
Vasa praevia
CTG normal ranges:
Baseline
Variability
Accelerations
Deeccelerations
Baseline - 110-160
Variability - >5 beats per minute
Accelerations - present
Decelerations - None
Fetal bld sampling indications
Pathological CTG
Fetal bld sampling risks/contraindications
Infx - HIV, HepC
Hb abnormalities - immune thrombocytopenia, Haemophilia B
Px - Umbilical cord below presenting part.
Important - Cord can become obstructed or spasm, starving the fetus of oxygen
Cord prolapse - Obs emergency
Cord prolapse Mx
Mx - Call fro help, IV access, stop woman pushing, elevate presenting part, deliver immediately (Instrumental/CS depending on quickest option)
Induction of labour indications (3 categories)
Contraindications (3 absolutes)
Fetal - suspected IUGR, Antepartum haemorrhage, prolonged pregnancy
Materno-fetal - PET, DM
Maternal - social, in utero death
Contraindications - acute fetal compromise,
Prostaglandin E2 (PGE2) PV
Induction of labour - starts labour/ripens cervix to allow amniotomy
Oxytocin infusion and ARM
Induction of labour
CTG sens and spec
High sens low spec
high Sens - 100 people w/ disease 98 will have +ve result
High Spec - 100 people who don’t have disease 98 won’t have it
Inductin of labour w/ intrauterine death
po mifepristone + po/pv misoprostol
Epidural contraindications (4)
Hypotension, abnormal lie, placenta praevia, pelvic obsruction
Ax - Chorionic vili in contact with the myometrium
Px - Rsk of PPH
Mx - Syntocinon, Balloon tamponade, iliac artery ligation, hysterectomy
Placenta accreta
Fetal cariac physiology (6)
Umbilical arteries occluded causing:
Reduced venous return to the right side of the heart
Therfore right atrial pressure closing the foramen ovale
Breathing causes dec pressure in pulmonary circulation=inc rt ventricular output
Pulmonary artery vasodilates
Inc pressure on left side
PDA closes due to rising oxygen levels