Key Obstetric notes Flashcards

(198 cards)

1
Q

when is the first trimester

A

0-12 weeks

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2
Q

when is the second trimester

A

13-27 weeks

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3
Q

when is the third trimester

A

28-40 weeks

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4
Q

What is the ideal baby presentation in utero

A

Presentation - head first
Lie - longitudinal
Placenta - upper segment
Attitude - Flexed vertex

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5
Q

What is gravidity

A

Number of pregnancies regardless of outcome - including current

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6
Q

what is parity

A

number of pregnancies beyond 24 weeks - not including current

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7
Q

what gestation is surfactant produced

A

34/35 weeks - comptently mature to do so then - but can be as early as 24 weeks - just not large amounts

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8
Q

If expected delivery before 35 weeks what can be done to help the lungs

A

give the mum corticosteroids
Give baby surfactant after birth

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9
Q

what hormone produced from the placenta increases the risk of DM

A

hPL (human placental lactogen)

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10
Q

what cardiovascular changes are seen for mum in pregnancy

A

decreased BP (increased CO but decreased TPR)

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11
Q

how should pregnant women sleep

A

on their side ( avoid IVC obstruction)

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12
Q

what haematological changes occur in pregnancy

A

anaemia
increased WCC
increased d-dimer

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13
Q

what GI changes in pregnancy

A

dysmotility = constipation and GORD

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14
Q

what happens to your immunity in pregnancy

A

decreases

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15
Q

what endocrine changes occur in pregnancy

A

poorer glycaemic control

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16
Q

what urology changes in pregnancy

A

increased renal excretion + increased UTI risk

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17
Q

what visual changes can be seen in pregnancy

A

enlarged stomach
linea nigra
striae gravidarum
polymorphic eruptions of pregnancy

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18
Q

when is the booking scan

A

8-12 weeks

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19
Q

what is checked for at the booking scan

A

Hep B
HIV
Sickle cell
Thalassaemia
Syphillis

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20
Q

what is in the combined test

A

USS - nuchal translucecny
beta-hCG
PAPP-A

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21
Q

what is tested for in the combined test

A

Trisomy 21
Trisomy 18
Trisomy 13

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22
Q

what combined test results might be seen in Trisomy 21

A

raised hCG
Low PAPP-A
>6 mm NT

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23
Q

when is the anomaly scan done

A

18-20 +6 weeks

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24
Q

what is checked on the anomaly scan

A

CHD
NTD
gastroschisis + omphalocele
Placenta praevia
+/- cleft lip, renal agenesis, anencephaly

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25
when is an OGTT normally done
24-28 weeks
26
when is Rh prophyslaxis given if Rh- mum
28 weeks
27
When should ECV be offered if breech
37 weeks can offer from 36 in nulliparous
28
what is the first step for inducing pregnancy
membrane sweep - sepearte chorion from decidua
29
when can chorionic villi sampling be done
11-14 weeks
30
when can amniocentesis be done
15 weeks
31
what are some risks of amniocentesis
miscarriage Rhesus sensitisation clubfoot infections
32
when can non-invasive pre-natal testing be done
15-20 weeks
33
when is the quadruple test done and what is tested
15-20 weeks beta-hCG Alpha feto-protein unconjugated estriol (E3) inhibin A All low except hCG and Inhibin-A in T.21
34
what are the two phases of stage 1 of labour
latent - cervical dilation <30% 0-4cm diameter - weak, irregular contractions 1-3 mins active - dilation 30-100% 5-10cm diamete - regular powerful contractions 60s every 1-2 mins
35
what is stage 2 of labour
Baby (2hr primi, 1 hr multi)
36
what is stage 2 of labour dependent on
power(contractions) passenger (cephalo-pelvic proportion) passage (pelvic inlet dimension)
37
what movements does baby do to exit
engage descent flex internal rotation extension external roation restituition expulsion
38
what is stage 3 of labour
placental delivery check remnants and for presence of all 3 vessels (2 arteries, 1 vein)
39
what is used to assess cervical ripeness
Bishop score
40
What would <5 Bishop score mean
unripe - unlikely to spontaneoulsy labour - incude
41
what would a score of >8 bishop mean
ripe, likely to spontaneous induce +/- can offer amniotomy
42
what can be offered for a bishop score
membrane sweep Vaginal prostaglandin (E2) PO misoprostol
43
what can be offered for a Bishop score >6
amniotomy IV oxytocin - synctocin
44
what indications are there for inducing labour
prolonged labour PPROM Maternal (GDM, Pre-Eclampsia, cholestasis)
45
what is given if a vaginal swab comes back positive for GBS
IV benpen during labour (or clindamycin)
46
what are some complications of inducing labout
uterine hyperstimulation (>6 contractions a minute) Fetal ischaemia risk Uterine rupture
47
what options are there for pain relief in labour
conservative - perianal/fundal massage, TENS Med - entonox, morphine (max 2 bolus) epidural anaesthesia
48
what are accelerations and decelerations on a CTG
FHR >15 BPM increase baseline for >15s Decrease for decels
49
when might epidural be CI
low platelets in DOAC Aspirin +/-APH, fetal distress
50
what are the side effects of epidural anaestehsia
urine retention hypotension hypoalgesia headache
51
what is variability on a CTG
FHR fluctuations 6-25 BPM
52
53
what are some CI to vaginal birth after C/S
>/= 2 prev. C/S One classical midline C/S
54
what are some complications of C/S
PPH Endometritis Rupture
55
what are some indications for C/S
Placenta praevia vasa praevia failure to progress active genital herpes cord prolpase fetomaternal distress
56
what are the categories of C/S
Cat 1 - emergency <30 mins Cat 2 - <75 mins Cat 3 Cat 4 - elective
57
what are the three interpretations of CTG
reassuring susipcious abnormal
58
what does DR CBraVADO stand for
define risk Contractions (3-5 / 10 mins) baseline rate variability accelerations decelerations overall impression
59
what could it indicate if the variability is <5 for >40 mins
baby asleep
60
what are some side effects of ventouse delivery
suction cup cephalohaematoma caput succendaenum (cross suture lines)
61
what is a risk with forcep delivery
CN 7 (facial) nerve palsy
62
how would you diagnose PPROM (preterm prelabour ROM)
<37 weeks ROM not directly preceding labout 1) Speculum fluid pool in posterior fornix 2) Nitrazine (pH) test >7.1 + fern test +ve (or IGF-1) +/- USS - oligohydramnios
63
what treatment would you give for PPROM
10d PO erythromycin - prevent chorioamnionitis - ascending infection (GBS/E.coli) Antenatal steroids
64
what are some risks to baby with PPROM
HIE still birth resp distress syndrome
65
what is cord prolapse
cord presents before baby - +/- visible through introitus
66
what are 3 risk factors for cord prolapse
polyhydramnios abnormal fetal lie ARM placenta praevia +vasa praevia multiple pregnancy breech LBW
67
what signs might be present with cord prolapse
visible cord fetal brady
68
what is the treatment for cord prolapse
All 4's (knee-chest) to reduce pressure on cord C-section - cat 1 for fetal distress, cat 2 for no fetal distress Consider tocolytics - terbutaline to buy time (stop/reduce contraction) May need to manually elevate head, but try not to touch cord
69
what is a risk of cord prolapse
fetal ischaemia
70
what do all breech babies need
USS hips
71
what are some risks of breech positioning
DDH HIE uterine rupture
72
what are some risks for perineal tears
macrosomia failure to progress
73
what are the categories of perineal tears
1) mucosal only - no Mx 2) mucosa + muscle - suture by midwife on ward 3) a)<50% EAS b) >50% EAS c) IAS + EAS 4) anal sphincter + anal/rectal mucosa 3 and 4 require theatre suture by suitably trained clinician
74
what is a miscarriage
death of a fetus in utero
75
what are some causes of miscarriages
Fetal - chromosome, structural, genetic maternal - smoking, IUGR, SLE, Placental insufficiency, DM
76
what is a threatened miscarriage
MC painless PV bleed fetal heartbeat
77
what is an inevitable miscarriage
painful PV bleed fetal HB Os OPEN pass clots
78
what is a complete miscarriage
Painful bleeding +/- stopped empty gestational sac os CLOSED
79
what is an incomplete miscarriage
painful PV bleed Retained POC os OPEN
80
what is a missed miscarriage
No pain +/- bleed empty gestation sac os CLOSED
81
how is a miscarriage diagnosed
TVUSS bHCG (may take up to 4-6 weeks for hCG to normalise after)
82
how to treat a threatened miscarriage
PV progesterone and repeat serum beta-hCG within 7 days
83
when can expectant management not be used for miscarriages
in inveitable or incomplete any other complications
84
what is medical management for miscariages
mifepristone PO then misoprostol PV 48 hours later
85
what is surgical treatment of miscarriage
dilation and curettage or suction aspiration
86
when can TOP be considered
before 24 weeks
87
88
how is TOP done before 13 weeks and then after
<13 weeks mifepristone then misoprostol >13 weeks suction D+C
89
where is the most common location for an ectopic pregnancy
ampulla of fallopian tube
90
risk factors for ectopic pregnancy
PID IVF endometriosis IUS/IUD PMHx ectopic
91
symptoms of ectopic pregnancy
unilateral R/L iliac foss pain PV bleed - light brown ammenhoreoic N+V shock KEHr sign - choulder tip cervical motion tenderness Dyschezia+dysuria
92
93
diagnosis of ectopic
serial beta-hCG elevation <63% TVUSS - extrauterine pregnancy
94
what is the treatment for an ectopic pregnancy
expectant medical surgical
95
when can expectant ectopic management be used
All: <35mm <1000 bhCG no fetal HB no pain
96
when can medical management of ectopic be used and what
IM methotrexate <35 mm <1500 bHCG no fetal HB No pain unruptured
97
when is surgical management used for an ectopic and what is done
1 of >35mm, >5000 HCG, fetal HB, pain Salpingectomy - no fertility concern salpingotomy - fertility concern - i.e. damage to other tube
98
what are some complications to ectopics
recurrence fallopina tube rupture early maternal death secondary to shock infertility with surgery
99
symptoms of molar pregnancy
PV bleed hyperemesis (very elevated hcg) HTN thyrotoxicosis large for gestation age
100
diagnosis of molar pregnancy
TVUSS - snowstorm No sign of baby
101
treatment of molar pregnancy
suction dilation and curetage FU with HCG 48hrs later
102
complication of molar pregnancy
choriocarcinoma (chemo + methotrexate)
103
risk factors for placenta praevia
multiple pregnancy previous miscarriage C-section increased age maternal smoking IVF PMHx
104
symptoms of placental praevia
painless PV bleeding bright red blood
105
Diagnosis of placenta praveia
TVUSS anomaly scan (18-20+6 weeks) - scan again at 34 weeks and may migrate up NO PV exam
106
treatment of placenta praevia
grade 1 (Lower seg <20mm internal os) consider VAG C/S
107
complications of placenta praevia
preterm birth maternal death secondary to shock morbidly adhered placenta
108
what are the spectrums of morbidly adhered placentas
accreta - surface of myometrium increta - deeply into myometrium percreta - past myomeytium and perimetrium - reach other organs
109
risk factors for morbidly adhered placenta
placenta praevia C/S Uterine surgery (D+C e.g.) multiparity increased age IVF
110
diagnosis of morbidly adhererd placenta
TVUSS anomaly scan - lkoss of normal hypoechoic retroplacental zone
111
treatment for morbidly adhered placenta
C/S!!!!! +hysterectomy
112
complications of morbidly adhered placenta
heavy PPH prematurity - plan delivery at 35-37 weeks placental infection if not hysterectomy
113
what are the three main causes of APH
placenta praevia placental abruption vasa praevia
114
risk factors for placental abruption
smoking cocaine use HTN trauma multiparity polyhydramnios
115
symptoms of placental abruption
painful dark red PV bleeding - pain not proportional to apparaent blood loss wood uterus
116
diagnosis and treatment of placental abruption
USS r/o vasa praevia stable obsevre, unstable cat 1 C/S
117
complications of placental abruption
prematurity DIC M-F death
118
risk factors for vasa praevia
IVF placenta praevia multipregnancy
119
symptoms of vasa praevia
painless heavy PV bleed simultaneous to ROM
120
siagnosis and management of vasa praevia
USS - show uterine arteries presenting Cat 1 C/S fetal death high
121
5 strong risk factors for pre-eclampsia
chronic HTN CKD aPL/SLE T1/2DM Phx pre-eclampsia
122
4 moderate risk factos for pre-eclampsia
1st pregnancy 40+ >35 BMI at booking last preg >10years FHx of pre-e
123
what should patients be started on at risk of pre-eclampsia and how is risk defined
1 high or 2 moderate risk factors 75mg aspirin from 12 weeks to birth
124
symptoms of pre-eclampsia
vision change headache abdo pain RUQ pain oliguira oedema
125
treatment for pre-eclampsia
1) labetalol (or nifedipine) 2) stable - planned delivery 37 weeks, unstable do when needed Stop prev. antihypertensives and start these if pre-existing
126
complications of pre-eclampsia
eclampsia - seizures - MgSO4 (fetal neuroprotection) _ delivery baby - moniotr for Mg toxicity with BP (+RR and reflex) (calcium gluconate if too high) HELLP - haemolysis, elevated liver enzymes, low platelets. RUQ pain, N+V - deliver ASAP DIC, IUGR, placental abruption
127
what antihypertensive should be given after birth
enalapril (nifedipine if black afro-carribean)
128
risk factors for GDM
PCOS PRe-eclampsia HTN obesity FHx DM
129
how is GDM diagnosed
OGTT at 24-28 weeks if PMHx of GDM test at booking and 24-28wks
130
how is GDM diagnosed
>5.6 FG >7.8 2hrs post
131
how is GDM managed
FPG <7 - 1-2 wks diet and exercise, resistant => metformin +/- insulin FPG >7 = insulin +/- metformin
132
complications of GDM
macrosomia => shoulder dystocia polyhydramnios traumatic birth perinatal death neonatal hypoglycaemia 50% GDM => T2DM
133
what is IUGR
growth slowing in utero due to pathology
134
what is small for gestation age
fetal growth <10th centile (+/- pathology)
135
causes of IUGR
fetal - chromosome, congential infection, congenital AB Mum - HTN, placental insufficiency, aPL, smoking, poorly controlled DM
136
what are the two types of IUGR
symmetrical - rarer abdo and brain impact - fetal defects asymmetrical - abdo and peripheral small, no brain defect - maternal placental insufficiency
137
complications of IUGR
prematurity still birth cognitive delays
138
complication of shoulder dystocia and treatment
ERB palsy!!! Help episiotomy McRoberts - legs up Pressure - suprapubic enter - internal rotation roll - all 4's
139
causes of large for gestational age
idiopathic FHx GDM polyhydramnios post-term
140
complications of LGA
perineal tears shoulder dystocia PPH
141
how is polyhydramnios diagnosed
USS AFI <>25, >2000ml
142
causes of polyhydramnios
GDM atresia - oesophageal/duodenal TORCH
143
complications of polyhydramnios
cord prolapse placental abruption PPH UTIs still birth prematurity
144
how is oligohydramnios defined
AFI <5 or <300ml
145
causes of oligohydramnios
PPROM Potter sequence utero-placental insufficiency
146
complications of oligohydramnios
fetal deformity/IUGR still birth chorioamnionitis prematurity
147
what causes vomiting in pregnancy
1/3 due to elevated bhCG from synchotrophobplast resolve by 16=20 weeks
148
risk factors for hyperemesis gravidarum
multiple preg molar preg hyperthyroidism DKA
149
symptoms of hyperemesis gravidarum
>5% pre preg wt loss dehydration electrolyte abnormal - ketonaemia
150
what would be seen on a VBG in hyperemesis gravidarum
low K low Cl metabolic alkalosis
151
treatment for hyperemesis gravidarum
1) cyclizine (antihistamine, promethazine) 2) ondansetron Other: ginger, accupuncture, hypnosis
152
what is the risk with ondansetron and metoclopromaide in pregnancy
more than 5 days use O => cleft palate M => extrapyramidal side effects
153
treatment for hyperemesis gravidarum
iv fluids + K+ +/- thiamine
154
causes of bleeding in first trimester
miscarriage extopic molar
155
156
classes of minor and major APH
minor = <50ml Major 50-1000ml
157
what is praimry and secondary postpartum haemorrhage
<24hrs >24hrs - 6 weeks !! of baby delivery not placenta !!
158
what is minor, mod and severe PPH
Minor - 500-1000 mod 1000-2000 severe >2L C-section >1000ml
159
causes of PPH
tone (MC) - atony trauma - tear, rupture tissue - retained POC thrombin - DIC
160
risk facors for PPH
polyhydramnios prolonged labour PHx C/S APH recent bleeding twins uterine fibroid multiparity
161
treatment for atony PPH
Help, Group and match - blood ready fundal massage + empty bladder 2x 14g large bore cannulae - fluid +/- blood IV oxytocin - IM then infuse then IV ergometrine (uterotonics) surgical - intrauterine balloon tamponade, blynch suture, hysterectomy
162
complication of PPH
Sheehans syndrome - hypopituitarism - ischaemic necrosis of ant. pituitary - secondary ammenorrhoea, agalactorrhoea DIC Shock => death
163
what type of hypersensitvity is rhesus disease
type 2 (IgG)
164
symptoms of rehsus disease
erythroblastosis fetalis - yellow amniotic fluid hydrops fetalis - portal HTN, pulm HTN, congestive HF = widespread oedema
165
diagnosis of Rhesus disease
+Coombs test increased reticuloblasts amniocentesis - yellow
166
treatment for rhesus disease
prevent Anti rhesus D antigen at 28 weeks, 34 weeks to Rh- mums => intraparutm, miscarriage/TOP (IM)
167
obstetric cholestasis symtpoms
itchy - esp palms worse at night looks well, normally around 34 weeks
168
diagnosis of obs cholestasis
Increased total bile salts and acids
169
treatment of obs cholestasis
ursodeoxycholic acid planned delivery 37 weeks
170
symptoms of acute fatty liver of pregnancy
jaundice in third trimester, RUQ pain, N+V V.unwell, Pre-eclampsia
171
siagnosis and Tx of AFLP
Increased bilirubin +/- DIC emergency delivery
172
risk factors for multiple pregnancy
FHx IVf idiopathic
173
diagnosis of multiple pregnancy
USS - Di-di - lambda sign mono-di - T sign
174
complications of multiple pregnancy
twin-twin transfusion syndrome (donor twin small) => twin anaemia - polychythaemia + selective growth restric low BWT increased prenatal mortality spontaenous preterm birth pre-eclampsia hyperemesis
175
treatment for twin-twin transfusion syndrome
fetoscopic laser ablation delivery 34-36+6 weeks
176
treatment for hyperthyroid in pregnancy
proprylthiouracil + propranolol
177
treatment for hypothryoid pregnancy
levothyroixine
178
what should you do with chickenpox/VZV exposure in pregnancy
check VZVIg <20 week VZVIg >20 weeks within 24hrs rash = PO aciclovir
179
what can parvovirus B19 precipitate in pregnancy
aplastic crisis in baby
180
when should pregnant urine be tested
at booking and third trimester
181
what should be used to treat UTI in pregnancy
nitro if not in third trimester cefalexin avoid trimethoprim in first trimester
182
tx cut offs for maternal anaemis
1/3 - <110 2/3 <105 3/3 <100
183
when should VTE prophylaxis be given to pregnant women
when >4 RFx - Phx, breast Ca, HTN, >30 BMI, >35 y/o, smoking, IVF, C/S, multiparity, immobility give LMWH until 6 week postpartum
184
contraception after birth
first 21 days safe lactational amenorrhoea - 6 months fully breastfed and no periods POP and implant anytime COCP not before 6 weeks IUD/IUS can be inserted within 48 hours postparum or >4 weeks postpartum
185
what cut off on edinburgh depression scale indicated Post partum depression
>/= 10
186
symptoms of PPD
decreased mood, energy, anhedonia >/=2 weeks CBT, CMHT, sertraline
187
symptoms of puerperal psychosis
severe mood swings, audiotry hallucinations, intent/thought to harm baby admit to mother baby unit
188
how is endometritis diagnosed
fever >38 within 72hrs pp w/ lower abdo pain + offensive discharge
189
common causes for endometritis
GBS KEEPS (esp e.coli)
190
treatment for endometritis
IV clindamycin + gentamicin
191
symptoms of amniotic fluid embolus
sudden onset shock SOB (anaphylaxis from amniotic fluid in maternal circulation
192
treatment of amniotic fluid embolous
A-E fluid ITU monitor blood transfuse + FFP
193
what key CVS changes occur in pregnancy
increase blood volume increase plasma volume increase cardiac output decrease vascular resistance decrease blood pressure
194
what key hormone changes occur in pregnancy
increase steroid hormones increase T3/T4 increase prolactin increase oest + prog increase hCG
195
what key resp system changes occur in pregnancy
increase tidal volume increase resp rate
196
what key renal changes occur in pregnancy
increase renal blood flow increase GFR increase water reabsorption
197
what key blood changes occur in pregnancy
increase FBC production increase WBC decrease platelets decrease albumin increase clotting factors increase ALP - placenta
198
what key skin changes occur in pregnancy
linea nigra melasma spider naevi striae gravidarum