Obstetrics and gynae Flashcards
when is a pregnancy considered full term
37-40 weeks
differnetials to post menopausal bleeding
- atrophic vaginitis
- endometrial polyp, hyperplasia or cancer
- cervical polyps or cancer
risk facors for endometrial cancer
- unopposed oestrogen (HRT)
- early menarche, late menopause
- nulliparity
- obesity
- PCOS
- tamoxifen
- FH (Lynch, HNPCC)
symptoms of endometrial cancer
- postmenopausal bleeding
- premenopausal change in intermenstrual bleeding
investigations for endometrial cancer
- women > 55 with PMB: 2WW
- transvaginal ultrasound (normal thickness <4mm)
- hysterectomy and endometrial biopsy
management of endometrial cancer
- localised disease: total abdominal hysterectomy with bilateral salpingo-oopherectomy (+ maybe post operative radiotherapy)
- progesterone if women frail and not suitable for surgery
def parity
nb of times pregnant beyond 24 weeks
def gravidity
nb of times women pregnant (including miscarriages and abortions)
how do you write the nb of pregnancies (including abortions/miscarriages)
Para x + y
x: parity
y: gravity
Trimester dates
T1: up to w12
T2: w13-w28
T3: w29-w40
beta HCG (curve of production and function)
- detectable 24-48h after implantation, peaks at 3 months
- produced by placenta to keep corpeus luteum alive (to produce oestrogen and progesterone)
progesterone if pregnancy (curve of production and function)
- continuously rising throughuot pregnancy, drops just before birth (produced by CL first then placenta)
- function: smooth muscle relaxant, maintains uterine lining, strengthens cervical mucus, stimulates growth of breast tissue
oestrogen during pregnancy (curve of production and function)
- continuously rises throughout pregnancy, drops just before birth (produced by CL and the placenta)
- function: increases nb of oxytocin receptors in uterus , increases uterine blood flow, stimulates breast tissue
changes to resp system during pregnancy
- increase in intraabdominal pressuer leading to more of a diaphragmatic breathing
- relative hyperventilation
- increase tidal volume
changes to cardiovascular system during pregnancy
- increase in CO
- drop in BP in T1 and T2
- heart and valves displaced to the right
changes to haematological system during pregnancy
- increase in plasma volume (oedema and anaemia (disproportionate increase in plasma volume over red blood cell volume)
- reeduced platelets (does not increase bleeding risk)
- hypercoaguability
- immunodeficient (protective to fetus)
changes to MSK system during pregnancy
- increase in BMI
- lower back pain
- lordosis
- carpal tunnel syndrome
- siatica
- muscle cramps
endocrine changes during pregnancy
- bHCG, oestrogen, progesterone, placental lactogen and GH
- hypertophy of ant pituitary gland
- increase in thyroid hormones
- increase in aldosterone and renin
- increase in relaxin (to loosen pelvis)
dermatological changes during pregnancy
- increase in skin pigmentation
- distention and proliferation of blood vessels
- spider angiomata, facial flusing and striae gravidarum
gynaecological changes during pregnancy
- breast enlargement
- areolar pigmentation
- uteric hypertrophy and stretching
- cervical gland hypertrophy (softening of cervix + mucus plug)
- vagina lactobacilli proliferation: increase in lactic acid, decrease in pH
breast changes during pregnancy
oestrogen
- increase adipose tissue
- increase lactiferous duct system
progesterone:
- breast lobule enlargement
- milk production
change to urological system during pregnancy
- renal blood flow increased (increase eGFR and kidney size)
- increase chance of UTI (uteric stretching + decrease in uteric motility)
change to GI system during pregnancy
- oesophageal relaxation (GORD)
- increase intraabdominal pressure (haemorhoids)
- reduced bowel motions
planning pregnancy management
LIFESTYLE
- folic acid 400 micrograms for 12/52 before pregnancy (or 5mg if diabetes, FH neuraal tube defects or on antiepileptic meds)
- vit D
- smoking: stop
- alcohol
- weight: BMI <25/30
PMH
- optimise health conditions: diabetes, epilepsy, cardiac, resp & GI disease, coeliac disease, psychiatry disorders
- seek pre- pregnancy counselling
VACCINATION
- flu
- MMR
- whooping
how do you calculate date of birth
- take first day of last period, add 1 year and substract 3 months then add 7 days
- ultrasound
ilpact of overweight on baby
- high BP
- blood clots
- miscarriage
- gestational diabetes
affect of smoking on baby
- time of birth
- weight of baby
- miscarriage
- sudden infant death syndrome
- breathing problems in first 6/12 of life
risk factors for high risk pregnancy
- age <20, >40
- ethnicity
- PMH
- previous surgery
- IVF treatment
- previous C section
- previous pb in pregnancy (hypertension FGR, fetal abnormalities, premature labour, APH/PPH, preeclampsia, thrombocytopaenia, 3rd/4th degree tear, previous stillbirth, late miscarriage or noeonatal death)
- FH
- SH (domestic abuse, homelessness, addition, financial support)
what needs to be assessed at each antenatal visit
- BP
- urine
- symphysiofundal height
- fetal movements
how do you assess for gestational age on USS
crown rump length
if > 84mm: use head circumference
timeline antenatal care for normal pregancy
- first contact: planning pregnancy
- 8 weeks: booking appointment
- 10+0 - 13+6: dating USS and nuchal fold measurement
- 16w: appointment for discussion
- 18+0 to 20+6: USS for fetal abnormalities/anatomy
- 25 weeks: routine appointment for nulliparous
- 26-28 weeks: glucose tolerance test
- 28 weeks: antiD (if at risk)
- 31w: appointment for nulliparous
- 34w: 2nd dose antiD
- routine appointments at 36, 38 and 40w
- 41w: induction
what is done at a booking appointment
- Hx taking
- discussion about: dvlpt of baby, nutrition and diet, exercise, place of birth, pregnancy care pathway, breastfeeding, screening, mental health
- bloods: Hb, platelets, infection (HIV, hep B, syphylis), blood group and ab status
screening in normal pregnancy
- infections (HIV, heep B, syphilis)
- sickle cell and thalassaemia (if high risk)
- down syndrome: nuchal translucency, PAPP-A, HCG
- gestational diabetes at 28 weeks
- pre eclampsia from
- placenta praevia
- bloods to check for anaemia, clotting etc
hormones prodcued by placenta to regulate insulin
human placental lactogen: increase insulin resistance
- human chorionic somatommatrophin: increase production of insulin
pathophysiology of gestational diabetes
- increase insulin resistance
- reduced glucose tolerance
- reduced renal tubular threshold for glucose
risk factors for GDM
- BMI > 30
- previous macrosomic baby > 4.5kg
- previous GDM
- FH of diabetes
- ethnicity
- PCOS
screening for GDM
- at 24-28 weeks (12-16 weeks if previous GDM)
- 2h 75g glucose tolerance test
- diagnostic criteria:
fasting glucose levels > 5.6 mmol/L
2h blood glucose levels >7.8 mmol/L
treatment of GDM
- diet and excercise
- metformin
- insulin
- monitoring before and after each meal
birth plan for GDM
offer delivery at 40+6 weeks
complications of GDM
- more likely to develop diabetes later (mother)
- same as diabetes in pregnancy (for baby)
pb of diabetes in pregnancy for baby
- glucose crosses placenta
- from w10, fetus produces insulin; increase fetal growth: macrosomia, polyhydramniosis, organomegaly, chronic fetal hypocia, shoulder dystocia, intrauterine fetal death, hypoglycaemia at birth, defects (cardiac, neural tube and renal abnormalities)
effect of pregnancy on diabetes
- insulin requirements increase during T2 and T3
- tight glycaemic control may worsen diabetic retinopathy
- increased hypoglycaemic attacks
effects of diabetes on pregnancy
- increased incidence of preeclampsia
- UTI
- miscarriage
- worsening renal disease
- increase C section
management of diabetes in pregnancy
- measure blood glucose fasting, pre and post meals and bedtime
- metformin or insulin
- aspirin 75mg (before 12/40 to educe risk of preeclampsia)
target blood glucose levels during pregnancy for women with diabetes
- fasting < 5.3
- 1h post meal: < 7.8
timeline of antenatal appointments for diabetic pregnancy
- booking appointment 10w
- USS 7-9 weeks
- 16w: retinal assessment (if retinopathy persent)
- 20w: USS fetal abnormalities
- 28w: USS fetal growth and liquor volume + retinal assessment (+ those with GDM enter pathway) and antiD
- 31w: routine invest (nulliparous)
- 32w: USS fetal growth and liquor volume
- 34w: antiD
- 36w:: USS fetal growth and liquor volume + info about delivery
- 37+0 - 38+6: offer induction/C section
- 38 and 39 weeks: offer test of fetal wellbeing
how many appointments should a nulliparous women with normal pregancy have
10
how many appointments should a parous women with normal pregancy have
7
how often should anomaly scan be done for women with diabetes
from 20 weeks, every 4 weeks
birth plan for pregnancy with diabetes
- delivery should be at 38w
- offer LSCS or IOL (esp if macrosomia), give steroids if before 39 weeks
- if T1DM: insulin dextrose sliding scle during labour
- first feed should be within 30mins and fetal blood sugars check every 2-4h
which medications should be avoided during pregnancy
- ACEi/ARB
- statins
- glibenclamide
- diuretics
- warfarin
- epileptic drugs: phenobarbitone, phenytoin, sodium valproate
- sex hormones, radioactive iodine
- methotrexate, cyclosphamide, NSAIDs
- trimethroprim (in T1) and nitrofurantoin (at term)
which meds are commonly used during pregnancy for the following
- diabetes, hypertension, clotting disorder, epilepsy, endocrine, inflammatory conditions, UTI, antiemetics
- diabetes: metformin, insulin
- hypertension: labetalol, nifedipine, methyldopa
- clotting: LMWH
- epilepsy: lamotrigine
- endocrine: carbimazole, propylthiouracil (only in T1)
- inflam: sulfazalazine, mesalazine, prednisolone
- UTI: nitrofurantoin
- antiemetics: cyclizine
hypertensive disorders in pregnancy
- chronic hypertension
- pregnancy induced hypertension /gestational hypertension
def pre-eclampsia
hypertension edveloping after 20 weeks gestation with 1+ of following:
- proteinuria
- maternal organ dysfunction (renal insufficiency, liver involvement, neurological, haematological
- fetal growth restriction
what are the maternal organ dysfunction in pre-eclampsia
- renal insufficiency: creatinine <90
- liver: elevated transaminase, RUQ or epigastric pain
- neuro: altered mental status, blindness, stroke, hyperreflexia, severe headache
- haematological: thrombocytopaenia, DIC, haemolysis
def eclampsia
Neurological involvement (generalised tonic clonic convulsiuons) in women with pre-eclampsia
BP curve during pregancy
- T1: normal
- T2: decreases
- T3: increases back to normal
def pregnancy induced hypertension
hypertension ( >140/90) in second half of pregnancy in absence of proteinuria or other markers of pre-eclampsia
treatment of hypertension in pregnancy
nifedipine and labetalol
risk factors for pre-eclampsia
- first pregnancy
- FH
- extremes of age
- obesity
- PMH: pre-existing hypertension, renal disease, acquired/inherited thrombophilia, connective tissue disease, DM
- obstretics factors: multiple pregnancies, previous pre-eclampsia, triploidy, inter-pregnancy interval > 10y, IVF
pathophysioogy of pre-eclampsia
- abnormal immunological response and genetic predisposition leading to poor placental development.
hypoperfused placenta and release of circulating factors which leads to activated vascular endothelium –> hypertension and organ damage
symtoms of preeclampsia
- sevre headache
- severe RUQ or epigastric pain
- sudden swelling of hands, face or feet
- visual disturbances (burring, flashing, scotomas)
- vomiting
- restlessness/agitation
signs of pre-eclampsia
- hypertension and proteinuria
- hyperreflexia and clonus
- serum creatinine raised
- decreased platelet count
- haemolytic anaemia
- elevated liver enzymes
- retinal haemorrhage and papilloedema
investigations for pre-eclampsia
- BP monitoring
- urine dipstick
- bloods: FBC, U&Es, coag, LFTs
- fetal assessment: SFH, fetal mvnt, USS (liquor volume and umbilical artery)
diagnosis of pre-eclampsia
- > 140/90 on 2 occasions, 4h appart
- proteinuria > 300mg/24h or >30mg on spot test proteine creatinine ratio
management of pre-eclampsia
- consultant led care
- BP < 160: labetalol, nifedipine, hydrallazine
- aspirin 75mg qd from 12/40 to birth
- lifestyle advice + fluid restriction
- management of HELLP
- induction of labour/C section at 37-38w
complications of pre-eclampsia (maternal and neonatal)
- maternal: placental rupture, DIC, HELLP syndrome, pulmonary oedema, aspiration, eclampsia, liver failure/haemorrage, stroke, death, long term CV mortality
- neonatal: pre-term delivery, intrauterine growth restriction, hypoxia neurological delay, perinatal death, long term CV morbidity (low birth weight association)
def small for gestational age
fetus with weight less than 10th centile (in personlised growth chart)
def fetal growth restriction
failure of fetus to reach predetermined growth potential due to pathology
(faltered growth)
types of FGR
- symmetrical: head and abdominal size are equally small. due to insult early in pregnancy/chromosomal/congenital abnormalities, Intrauterine infections, substance abuse
- assymetrical: inadequate nutrition: redistribution of blood flow to head/brain and heart. usually due to insult later in pregnancy: PET, essential hypertension, maternal smoking
risk factors for FGR
- mat age > 40
- pat or mat SGA
- prev SGA or stillbirth or PET
- nulliparity
- pregnancy interval < 6m or >6y??
PMH: renal impairement, chronic HTN, DM with vascular disease, APS, heavy BVP - IVF
- low PAPP-A
- smoking
- cocaine use
investigations if risk factors for FGR
- uterine artery doppler scan at 20w if low risk (if normal, single scan in T3 and if abnormal, serial scans from 28 weeks)
- if high risk; serial scans from 28 weeks
aetiology of FGR
- gas exchange and nutrient delivery to fetus impaired (impaired maternal oxygen carrying and delivery, placental damage)
- instrinsic pb with fetus (chromosal or congenital abnormalities, intrauterine inf)
implications for fetus of FGR
short term:
- premature birth
- low APGAR
- hypoglycaemia and hypocalcaemia
- NICU stay
long term:
- learning difficulties
- short stature
- failure to thrive
- cerebral palsy
- HTN
- DMT2
- heart disease
management of FGR
- early onset < 32w: suggestive of congenital infection or chromosomal abnormalitie: USS and amniocentesis, steroids and intensiive monitoring
- late onset: >32w: surveillance and delivery if needed (36w with steroids)
management of iron deficiency anaemai in pregnancy
oral iron for 2 weeks, then test again. if not come up,, do follow up tests
uterine relaxants
magnesium relaxin nefedipine terbutaline atosiban oxytoxin endothelin misoprostol nitric oxide indomethacin
uterine stimulants
oxytoxin endothelin misoprostol prostin ergometrine
risk factors for ectopic pregancy
- previous ectopic pregnancy
- previous/current PID
- previous surgery to tubes
- IUS/IUD
- assisted concetion, especially in vitro
- smoking (reduces cilia function)
sites of occurance of ectopic pregnancy
- Fallopian tube (mainly ampulla)
- ovary
- cervix
- interstitial
- C section scar
- heterotopic (multiple pregnancies, one implanted right, the other ectopic)
- abdominal
presentation of ectopic pregnancy
- usually by 5-7 weeks
- pelvic tenderness
- adnexal tenderness
- abdominal tenderness
+ cervical excitation
- rebound tenderness or peritoneal signs
- pallor
- abdominal distention
- enlarged uterus
- tachycardia, hypotension/ shock, collapse
- free fluid in pouch of douglas
- referred pain to shoulder
investigations for ectopic pregnancy
bloods: baseline, HCG (baseline and 48h), G&S, progesterone
- transvaginal USS
management of ectopic pregnancy
- call for help and refer to EPAU
- conservative: monitor and pain relief
- medical: methotrexate up to two doses
- surgical: salphingectomy or salphingotomy
- give anti D (if rhesus neg)
- book scan if pregnant again
what must be communicated in medical management of ectopic pregnancy
delay pregnany for 3 months after due to methotrexate teratogenicity
what must be communicated in medical surgical of ectopic pregnancy
salphinotomy can increase risk of future ectopic pregnancies