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Flashcards in Obs And Gynae Deck (191):
1

Which hormones are actively involved in transforming a pregnancy into the labour phase?

Progesterone levels decrease and oxytocin increases which increase uterine contractions
Prostaglandin levels increase which lead to cervical ripening and increase uterine contractions
Oestrogen and relaxin also contribute to this

2

When is a foetus considered mature?

Maintain an independent existence outside the uterus
Breathe / maintain oxygenation
Feed / Maintain blood sugars
Maintain body temperature

3

When is a foetus considered viable?

Can survive extra-uterine
Usually 23-24 weeks depending on neonatal intensive care facilities

4

When is a foetus considered term?

Gestational age
37 completed weeks till 42 weeks

5

When is a foetus considered pre term?

Earlier than 37 completed weeks and after accepted age of viability (23-24 weeks)

6

When is a foetus considered post mature?

After 42 weeks

7

What processes have to occur in the process of parturition?

Cervical ripening / effacement
Cervical dilatation
Uterine contractions
Foetal membrane rupture

8

What is cervical effacement?

Cervix shortens and thins

9

What is a bloody show?

Mucus plug loosened and released from cervix as it starts to efface

10

What is the latent phase of labour?

Once cervix effacement starts to dilation of 4cm and regular contractions have begun

11

What factors contribute to cervical ripening?

Cyclooxygenase-2
Prostaglandin E2 (PGE2) and F2-alpha
Hyaluronic acid
Chemotaxis for leukocytes, causes increased collagen degradation
Stimulation of interleukin (IL)–8 release
Activity of matrix metalloproteinases 2 and 9
Cervical collagenase and elastase

12

Why can infection or inflammation lead to pre term labour?

Cytokines: interleukins 1 and 6 released as inflammatory response can trigger the process of cervical ripening and uterine contractions as they lead to the production of prostaglandins E2 and F2a

13

What are indications for inducing labour using prostaglandins?

Prolonged pregnancy
Pre labour rupture of membranes
Concerns about health of mother: pre eclampsia
Concerns about health of baby: poor growth

14

What can be used to induce labour?

Prostaglandin E2
Propess and cervidil: controlled release vaginal insert
Prostin and glandin: vaginal suppositories

15

What are the names of the foetal membranes?

Chorion: outermost membrane, contributes to placenta formation
Amnion: when first formed, closely covers embryo, fills with amniotic fluid to become protective sac

16

What cellular changes occur to allow growth of the uterus?

Smooth muscle hyperplasia and hypertrophy

17

When is the first trimester?

0-12 weeks

18

When is the second trimester?

13-28 weeks

19

When is the third trimester?

29-40 weeks

20

What are the layers of the uterus?

Endometrium: highly vascular mucosa, stratum functionalis (shed during menstruation), stratum basalis (permanent, gives rise to new functionalis after each cycle)
Myometrium: three layers of muscle
Perimetrium/serosa: visceral peritoneum

21

What happens to the Myometrium prior to parturition?

Increased expression of contraction-associated proteins,
including oxytocin receptors, connexin-43, and prostaglandin F2alpha receptors
Down-regulation of the nitric oxide (NO) pathway and other
vasorelaxing peptides

22

What happens to the myometrium during labour?

Prostaglandins and oxytocin act in synergy to trigger contractility through an increase in intracellular Ca2+ concentration

23

What percentage of deliveries are pre term?

7-10%

24

What factors could cause pre term labour?

Increasing maternal age, stress (domestic abuse)
Pre term rupture of membranes: infection, smoking, drug use, previous PROM, polyhydramnios, multiple gestation, amniocentesis, poor nutrition, cervical insufficiency, low SES, underweight
Pre term contractions
Cervical insufficiency: previous cervical biopsy, uterine abnormalities, trauma to cervix

25

What are tocolytics? Give examples

Used to suppress premature labour, buy time for administration of betamethasone
Terbutaline/salbutamol: B2 agonist
Nifedipine: ca channel blocker
Atosiban: oxytocin antagonist
Indomethacin: NSAID
Magnesium sulfate: myosin light chain inhibitor, reduce risk of cerebral palsy

26

What is Oligohydramnios? What increases the risk of this?

Foetal chromosomal abnormalities
Intra uterine infections
PG inhibitors, ACE inhibitors
Obstruction of foetal urinary tract
Intra uterine growth restriction
Amnion nodosum: failure of secretion by amnion cells covering placenta
Post maturity

27

What is polyhydramnios? What increases the risk?

Twins/ multiple gestation
Gestational diabetes
Gastrointestinal atresia of foetus
Rhesus disease in mother
Chorioangioma
Chromosomal abnormality of foetus
Hydrous fetalis: fluid build up in foetus' abdomen or thorax

28

What factors can be used to predict the risk of pre term labour?

Past obstetric history
Cervical length
Bacterial vaginosis
Cervical factors: Fetal fibronectin, actim partus

29

What is foetal fibronectin?

Found at interface of chorion and decidua: "glue" that binds foetal sac to uterine lining
Leaks info vagina if pre term delivery is likely to occur so can be measured as a screening test

30

What is actim partus?

Phosphorylated insulin like growth factor binding protein detected in cervical samples
Has high negative predictive value - negative result, labour will not begin in next 7 days so can be sent home with confidence

31

What risks are there to the foetus if delivered pre term?

Respiratory distress syndrome (hyaline membrane disease)
Intraventricular haemorrhage
Necrotising enterocolitis
Patent ductus arteriosus
Cerebral palsy

32

What treatment can be given in clinic for pre term labour?

Bed rest
Antibiotics
Cervical stitch
Progesterone

33

What effect does bacterial vaginosis have on inducing pre term labour? What can be done to treat it?

Good predictor of PTL in high risk women - 7 fold increased risk
Clindamycin can prevent preterm labour if BV positive

34

What length should a normal cervix be?

4-5cm when not pregnant
Average of 3.5cm in pregnancy

35

What is a primigravida?

Woman who is pregnant for the first time

36

What is a multiparous woman?

Has borne more than one child

37

What is the difference between a still birth and a miscarriage?

Miscarriage: foetus dies in utero before 24 weeks, not issued a death certificate
Still birth: foetus dies in utero after 24 weeks, issued a death certificate

38

What is the transformation zone of the cervix?

Inside glandular, outside stratified squamous epithelium
Most common place for abnormal cells to develop - Pap smear

39

Which hormone is responsible for maintaining a pregnancy in quiescence?

High levels Progesterone, low levels oestrogen - uterine quiescence and and cervical rigidity

40

What is pregnancy induced hypertension?

Increase in BP, no proteinuria, returns to normal after pregnancy

41

What is pre-eclampsia/eclampsia?

Increase in BP with proteinuria

42

What is essential hypertension in pregnancy?

Occurs before 20 weeks, >140/90 mmHg

43

What change in korotkoff sounds might you get in a pregnant lady?

Pregnancy increased blood volume, can hear softening and stopping of Korotkoff sounds
In some women can hear sounds at very low cuff inflation pressure

44

What happens to MAP, CO and plasma volume through a pregnancy?

CO and plasma volume increase dramatically up to 20/30 weeks and decrease back to normal after delivery
MAP decreases slightly to 20 weeks and then rises back to baseline again towards term

45

What medication changes might be required in essential hypertension in pregnancy?

Changing doses of anti-hypertensive medication throughout pregnancy

46

What happens to GFR and urea levels in pregnancy?

Renal changes in pregnancy: Increase blood flow to kidney
Increased GFR
Lower urea levels in pregnant women

47

What is the pathophysiology of pre-eclampsia?

Failed adaptation to pregnancy
Inadequate placentation
Foetal cells don't adequately invade and so spiral artery dilation doesn't occur sufficiently
High flow, high pressure system
Placenta signals to mother that it is not receiving enough supply so causes hypertension, proteinuria, liver dysfunction and if left untreated, cerebral oedema

48

What is the treatment for pre eclampsia?

Delivery of the foetus

49

What cardiac disease problems are made worse by pregnancy?

Increased blood flow: Normal to hear end diastolic flow murmur
Arrhythmia: Worse
If valvular heart disease: May not be able to increase CO, Heart failure

50

What respiratory change occur in pregnancy?

Rib cage and breast enlargement
Diaphragm pushed cranially: changes in lung vol
Increased mucosal engorgement: nasal – epistaxis
Asthma symptoms worse as lung capacity is decreased
Respiratory rate increases: normal

51

What happens to T cell levels in pregnancy? And what significance does this have in asthma and RA?

T helper 1 cell levels decrease: this means that RA symptoms are decreased in pregnancy as less interferon gamma is released
T helper 2 cell levels increase: this means that asthma is made worse as increased mast cell activation, B cells releasing IgE and eosinophils are released

52

Describe the functional flow of immunity following antigen detection

Antigen detected by antigen presenting cell
This signals to t helper cells which release cytokines to activate natural killer cells, macrophages and B cells
B cells release antibodies to opsonise the cell
T helper cells also directly activate cytotoxic T cells

53

How do t helper cells differentiate from naive to type 1 or 2?

Naive cells signalled by IL-6 from APCs and IL-4 from mast cells, eosinophils and NK cells cause differentiation to T helper 2 cells
Naive cells signalled by IL12 from APCs and IFNgamma from NK cells and t helper 1 cells cause differentiation to t helper 1 cells

54

What do t helper 1 cells do?

Fight viruses, cancer, yeast and intracellular pneumonia
Cell mediated immune responses

55

What do t helper 2 cells do?

Normal bacteria, Parasites, Toxins, Allergens
Humoral immune response

56

What change in immune balance must occur during pregnancy?

Pregnancy maternal and paternal antigens similar to tissue graft. Change in immune balance in pregnancy: decrease in t helper 1 cells which would lead to rejection. Decrease in IL-2 and IFNgamma
Increase in t helper 2 cells which lead to tolerance. Increase in IL-4, 5 and 10
Worsening of asthma, More susceptible to influenza (H1N1), Rheumatoid arthritis better

57

If the placenta in a pregnancy is small, what does this increase the risk of for the child in later life?

Increase in heart disease, diabetes,hypertension, obesity

58

If a foetus encounters starvation during pregnancy, what are they at increased risk of in later life?

Increase in heart disease, diabetes obesity

59

What factors can cause in utero programming of a foetus which can lead to problems later in life?

Maternal stress
Infection
Smoking
Under nutrition
Placental dysfunction
Alcohol

60

What in utero programming can occur which affect vasculature and metabolism?

Thrifty phenotype hypothesis
Reduced pancreatic B cell mass
Insulin resistance in muscle liver and adipose tissue
Changes to HPA and neuroendocrine axis: results in over nutrition
Kidney glomerular number affected: hypertension and renal disease
All results in metabolic syndrome

61

Which bio marker measured antenatally is associated with failure of formation of the vertebral arches?

Raised maternal serum alpha feto protein (AFP)
Neural tube defects

62

What is genetic imprinting?

Certain genes are expressed in parent of origin specific manner
Involves methylation
Occurs in germline and maintained in all somatic cells

63

What is DNMT?

DNA methyl transferase
Catalyse transfer of methyl group to DNA
When located in a gene promoter, DNA methylation acts to repress gene transcription

64

What role does DNMT play in germ cells?

Immature gamete acted on by DNMT to convert to mature gamete

65

What role does DNMT play in silencing of the X chromosome and imprinted genes?

Acts on pluripotent stem cells to help them on an embryonic lineage

66

What placental features can affect nutrient supply to a foetus?

Hormone production and metabolism: oestrogen, progesterone, human placental lactogen and hCG
Nutrient consumption and production
Transporter abundance
Blood flow
Size and morphology

67

What is the function of hCG released by the placenta?

Prevents atrophy of the corpus luteum
Stimulates corpus luteum to release more progesterone and oestrogen

68

What is the role of progesterone released by the placenta?

Prevent spontaneous abortion as it prevents contractions of the uterus and is necessary for implantation

69

What is the role of oestrogen released by the placenta?

Proliferation of breasts and uterus
Also increases blood supply towards end of pregnancy through vasodilation

70

What is the role of human placental lactogen released from the placenta?

Develop foetal metabolism and general growth and development
Acts on lactogenic receptors to modulate embryonic development, metabolism, stimulate production of IGF, insulin, surfactant and adrenocortical hormones

71

When does oogenesis occur?

Oocytes are all formed in prior to birth
Imprinting occurs in mother uterus

72

Describe how adverse intrauterine environment for a foetus can have an effect on multiple generations

Adverse intrauterine environment can lead to poor placentation
This in turn results in adverse pregnancy outcomes which increases risk of early onset cardiovascular problems
This is exacerbated by poor socioeconomic status, deprivation and ethnicity which then increases the risk of adverse intrauterine environments in future generations

73

How is high maternal weight linked with childhood obesity?

Maternal obesity can lead to an adverse intrauterine environment and then an increased birth weight of the baby
This then predisposes to childhood obesity which is further exacerbated by low socioeconomic status, deprivation and ethnicity which then increases risk of developing into an obese adult and the cycle continues

74

What percentage of couples experience sub fertility in England and Wales?

15%

75

What percentage of couples experience recurrent miscarriages?

2%

76

What percent of pregnancies result in premature delivery?

10%

77

What percentage of women in England and Wales have maternal obesity?

30%

78

What percentage of pregnant women in the uk experience gestational diabetes?

5%

79

What percentage of pregnant women experience pre eclampsia?

2%

80

What percentage of pregnant women experience growth restriction of their foetus?

2%

81

What problems occur in pregnancy in the developing world?

Much higher incidence of complications
Low birth weight Eg Malawi 18% low birth rate
Intergenerational disease

82

Name some complications of obesity in pregnancy

Conception: decreased fertility
Embryonic period: increased risk of miscarriage and foetal malformations
Foetal period: abnormal growth, decreased detection of foetal anomalies
Pregnancy: gestational diabetes, hypertensive disorders, increased depression risk, infections, respiratory problems
Delivery: increased risk of induction of labour, instrumental delivery, Caesarian section, anaesthetic complications, intrapartum monitoring difficulties, risk of birth trauma
Postpartum: increased risk postpartum haemorrhage, thrombosis, wound infection, weight retention, T2DM, decreased breast feeding levels

83

Name some complications for the child if their mother was obese during pregnancy

Increased risk childhood obesity
Increased risk of metabolic syndrome in adulthood

84

What role does GLUT4 play in the development of diabetes in pregnant women?

Resistance to GLUT4
Reduced GLUT4 expression in adipose tissue and skeletal muscle so reduced glucose uptake by tissues

85

What molecular factors contribute to the development of insulin resistance in pregnancy?

Increased leptin
Decreased adiponectin
Increased TNF alpha
Increased AFABP (adipocyte fatty acid binding protein)

86

Why will a baby born to a diabetic mother be hypoglycaemic after birth?

High glucose levels in mum means high glucose levels in foetus
This leads to increased insulin levels in foetus which remain high after delivery and therefore more glucose is taken up into cells

87

How can obesity lead to hyperglycaemia in pregnancy?

Obesity leads to inflammation which in turn leads to insulin resistance and therefore hyperglycaemia
Hyperglycaemia causes glucotoxicity which in turn exacerbates inflammation and insulin resistance

88

How does hyperglycaemia lead to diabetes in pregnancy?

Hyperglycaemia leads to pancreatic beta cell damage which in turn results in decreased insulin output

89

What damaging effects can hyperglycaemia have in pregnancy?

Placental vascular damage
Atherosclerosis
Nephropathy
Retinopathy
Neuropathy
Immune dysfunction
Poor wound healing

90

What percentage of women across the world die of post partum haemorrhage?

10%

91

What is controlled cord traction?

Give ergometrine or oxytocin first
Pull gently, as soon as uterus feels hard, lift it towards her umbilicus
First pull downwards and backwards then more anteriorly

92

Describe the milk let down reflex and how this can help to reduce post partum haemorrhage

Baby suckling triggers mechanoreceptors in nipple
Signals sent to higher brain centres and hypothalamus (baby crying can directly stimulate these centres)
Dopaminergic neurons are inhibited, decreased signals via portal system to anterior pituitary so inhibition of prolactin cells is removed
Prolactin secretion occurs which triggers milk secretion
Hypothalamus signals also to oxytocin neurons which via posterior pituitary lead to increased oxytocin and therefore smooth muscle contraction of both the breast and the uterus, so reducing bleeding

93

What changes occur to maternal blood during pregnancy?

Increase in maternal blood volume by 45%
Increase in plasma volume by 55%
Increase in red blood cell volume by 15%
Decrease in haemoglobin by 17%
Overall haematocrit 35.5%, dilutional anaemia
Can tolerate haemorrhage better than non pregnant women

94

What are average blood losses at delivery?

600 ml with vaginal delivery
1000ml with C/Section

95

What changes in coagulation factors are present in pregnant women?

Increase in pro-coagulants: II, VII, VIII, X, XII, Fibrinogen
Decrease in Protein C&S
Decreased fibrinolytic state: Increased serum plasminogen activator
inhibitor PAI-1, Placental activator inhibitor 2

96

Why are pregnant women more prone to thrombosis?

Increased coagulation factors
Pressure effects of pregnancy
Less mobile

97

How is foetal wellbeing measured in the first trimester?

Assessment of gestational age using Crown to Rump Length (CRL): dating pregnancy
Measurement of nuchal translucency (weeks 11-13+6): Down's syndrome screening

98

When should fusion of the neural tube occur in a pregnancy? Therefore what supplement should the mother take during this time?

Should happen by 6 weeks
Take folic acid for first 12 weeks

99

What is gastroschisis?

Congenital defect of the abdo wall where baby's abdo contents freely protrude through with no overlying sac or peritoneum
Located at junction of umbilicus and normal skin and is almost always to the right of the umbilicus
Defect occurs 5-8 weeks after conception

100

What is exomphalos?

Defect in development of muscles of abdo wall
Organs can end up outside of the abdomen in a sac - omphalocele

101

What is being examined for on a mid trimester ultrasound? And when can it be performed?

18+0 to 20+6 weeks
Foetal anatomy
Placental site
Looks for: anencephaly, open spina bifida, cleft lip, diaphragmatic hernia, gastroschisis, exomphalos, serious cardiac abnormalities, bilateral renal agenesis, lethal skeletal dysplasia, Edwards syndrome (T18), Pataus syndrome (T13)

102

When do you start measuring symphysio-fundal height?

24-26 weeks
When pregnancy has moved out of pelvis and into abdomen

103

How is foetal growth measured?

Estimated weight calculated from: Head circumference, Abdominal circumference, Femur length

104

What foetal growth problems may be detected on a growth scan?

Symmetric vs asymmetric growth restriction: HC and AC similar, Reduction in AC to preserve brain development
Small for gestational age
Foetal growth restriction: Growth under 10th centile

105

What problems may small for gestational age babies encounter towards the end of pregnancy?

Normal, but have less in reserve. CTG may be abnormal
Dont cope well with stress of labour

106

What are the components of a biophysical profile to assess foetal wellbeing?

Foetal movement
Resting tone
Breathing movements
Amniotic fluid volume

107

When might a Doppler ultrasound be used to assess foetal wellbeing?

Small babies
Pre eclampsia
Diabetic mothers

108

What should a Doppler ultrasound of an umbilical cord show in utero?

2 arteries, small - deoxygenated
1 vein, big - oxygenated blood

109

What uses of Doppler ultrasound are there in pregnancy?

Assessment of fetal wellbeing: Measure flow in umbilical artery
Assessment of fetal anaemia: Measure flow in Middle Cerebral Artery
Timing of delivery: give estimate of how long we can prolong pregnancy

110

What are reassuring features on a cardiotocography trace?

Baseline 110-160 bpm
Accelerations
Variability >5
No decelerations

111

What is a CTG useful for predicting?

High negative predictive value: when normal, fetal acidaemia unlikely, When abnormal, fetus acidaemia could still be unlikely
Used antenatally: Changes may reflect the end stage process of chronic hypoxia

112

What is foetal scalp blood sampling used for?

Used during labour to confirm whether foetal oxygenation is sufficient
pH and lactate are measured: acidosis shown by low pH and high lactate, pH 7.20 or less, baby needs to come out
Shallow cut by transvaginally inserted blood lancet, followed by a thin pipe to site which samples capillary blood

113

What is atrophic vaginitis?

Reduced oestrogen levels cause atrophy of the vaginal mucosa leading to dryness and bleeding

114

What level of endometrial wall thickness should lead to a biopsy of the endometrial lining to look for cancer?

Over 5mm

115

Which metabolite of arachidonic acid can be used in termination of pregnancy?

Prostaglandin E2

116

What are risk factors for endometrial cancer?

Early menarche
Nulliparity
Late menopause
Tamoxifen or tibolone use
Pelvic irradiation
HRT
FH breast, ovarian and colon cancer

117

A 35 year old smoker comes to the gp wanting contraception 6 months after having a child. She suffers from migraines and has had previous ectopic pregnancies. She would like contraception that can be reversed as she would like another child in the near future. What is the best option?

Nexplanon implant
Migraines and smoker over the age of 35, oestrogen is contraindicated
Ectopic pregnancies mean a coil would not be advised
Progesterone injection can take 6 months to reverse so implant is the right option

118

What are risk factors for pre eclampsia?

First pregnancy
Extremes of maternal age
Family history
Co morbidities - diabetes, SLE and thrombophilia

119

What are signs and symptoms of pre eclampsia?

Headaches
Visual disturbances
Proteinuria
Hypertension
Epigastric pain
Nausea and vomiting

120

What is given to control eclampsia?

Magnesium sulphate

121

What is the quadruple test to detect Down's syndrome in pregnancy?

Maternal alpha feto protein
Unconjugated estriol
Inhibin A
Woman's age

122

What is the antibiotic of choice to treat neisseria gonorrhoea infection?

Cefixime 400mg

123

What is the treatment of choice for chlamydia infection?

Azithromycin 1g

124

What is given to treat bacterial vaginosis?

Metronidazole 400mg for 5 days

125

What would you expect to see on a microscopic analysis of a high vaginal swab from a patient with bacterial vaginosis?

Epithelial clue cells

126

What is amsels criteria which is used to diagnose bacterial vaginosis?

Thin homogenous discharge
Vaginal pH of more than 4.5
Amine odour after adding 10% potassium hydroxide to vaginal fluid
Presence of clue cells after adding sodium chloride solution
If 3/4 present then diagnosis made

127

What are clue cells?

Epithelial cells covered with bacteria after adding sodium chloride solution

128

How would a blood test differentiate between PCOS and Cushing's as a cause for infertility?

FSH:LH ratio 3:1 in PCOS
Condition starts at an earlier age

129

What are contraindications for using the combined oral contraceptive pill?

Age over 35
Current smoker of 10 cigarettes a day
History of DVT
History of migraines without focal neurological signs
BP of 140/90

130

What are some gynaecological causes of abdominal pain?

Ruptured or torted abdominal cyst
Urinary tract infection
Pelvic inflammatory disease
Pregnancy
Ectopic pregnancy
Primary dysmenorrhea
Malignancy

131

What are some causes of galactorhoea?

Pregnancy
Hyperprolactinaemia - prolactinoma, hypothyroidism, renal failure, haloperidol

132

Which HPV causes genital warts?

HPV 6

133

Which HPVs cause cervical cancer?

HPV 16 and 18

134

A 32 year old woman sees her GP about heavy periods. She was referred to a gynaecologist who diagnosed a small fibroid. She has one child. What is the most appropriate management?

Intra uterine contraceptive device to control the size and the bleeding

135

What is the most common site for implantation of an ectopic pregnancy?

Ampulla of the Fallopian tube

136

What factors may increase the risk of cervical carcinoma?

HPV 16 and 18
Prolonged pill use
High parity
High number of sexual partners
STIs and HIV infection

137

What cell type is the most common cause of cervical carcinoma?

Squamous cell

138

Describe the stages of cervical carcinoma

Stage 1: tumours confined to cervix
Stage 2: have spread to upper 2/3 of vagina
Stage 3: have spread to lower 1/3 of vagina
Stage 4: have spread to bladder and rectum
Stage 4b: have spread to distant organs

139

What signs and symptoms would be present in a patient with endometriosis?

Menorrhagia: heavy periods
Pelvic pain related to menstrual cycle
Enlarged boggy uterus felt on examination (adenomyosis)
Dyspareunia
Thigh pain
Pain on defecation

140

A woman presents to her GP complaining of vaginal discharge which is thin, frothy and offensive smelling. A swab is taken and reported as demonstrating motile Protozoa. What is the most likely diagnosis?

Trichomoniasis

141

What are some symptoms of lymphogranuloma venereum?

Blood or pus in stools
Tenesmus
Swelling
Painless sores in the genital area
Groin lymphadenopathy

142

What are features of Behçet's disease?

Systemic vasculitis
Recurrent oral and genital ulcers
Ocular inflammation
Skin manifestations
Neurological problems

143

What are side effects of progesterone?

Headaches
Acne
Breast pain
Weight gain
Mood swings

144

When in a menstrual cycle would a patient with menorrhagia be advised to take tranexamic acid?

During heavy bleeding periods

145

What are surgical options for fibroids?

Myomectomy
Uterine artery ablation
Hysterectomy

146

What is Mefenamic acid?

NSAID
Used to treat mild to moderate pain including menstrual pain and can be used to prevent migraines associated with menstruation

147

What is occurring if there is cervical dilatation in the absence of uterine contraction during pregnancy?

Cervical insufficiency

148

What is active management for the 3rd stage of labour?

Prophylactic administration of oxytocin, prostaglandins or ergot alkaloids, cord clamping/cutting and controlled cord traction

149

If on pelvic examination of a pregnant woman heading to term, macroscopic blood is present, what should be done?

Pelvic examination deferred until placenta previa is excluded with ultrasound

150

What 4 things can be determined from digital examination of a pregnant woman heading to term?

Degree of cervical dilation
Cervical effacement
Position
Consistency - soft or firm

151

What can be used to monitor timings of uterine contractions?

Tocodynamometry

152

How is foetal monitoring achieved during labour?

Cardiotocography: continuous or intermittent
Intermittent auscultation

153

How can risk of foetal intolerance for labour be assessed?

Foetal scalp capillary sampling
Assess foetal oxygenation and blood pH, below 7.2 needs further investigation

154

If a woman has premature rupture of foetal membranes, what should be done prophylactically?

Group b strep prophylaxis

155

What are the 2 methods for augmenting labour?

Low dose oxytocin with long intervals between dose increments
Early amniotomy, hourly cervical examinations, early diagnosis of inefficient uterine activity, high dose oxytocin infusion

156

What are some risk factors for labour not progressing during the first stage?

Premature rupture of membranes
Nulliparity
Induction of labour
Increasing maternal age
Previous perinatal death
Pregestational or gestational DM
HTN
Infertility treatment

157

What is the term for when the foetal head forcibly extends the vaginal outlet?

Crowning

158

Which spinal levels are involved in uterine contraction pain?

T10-L1

159

What are women who take oestrogen hrt at increased risk of?

MI
Stroke
Breast cancer
Endometrial cancer
Gallstones
Raised triglyceride levels
Blood clots

160

What factors may influence the age at which a woman experiences menopause?

Smoking
Socio economic status
Age at menarche
Parity
Previous oral contraceptive hx
BMI
Ethnicity
Family history

161

What diagnoses should be considered in a woman with vaginal itch and discharge?

Vulvovaginal candidiasis
Trichomonas
Bacterial vaginosis

162

What are the criteria for the diagnosis of bacterial vaginosis?

Three of:
Characteristic vaginal discharge
Amine test: raised vaginal pH using narrow range indicator paper >4.7
Fishy odour on mixing drop of discharge with 10% potassium hydroxide
Presence of clue cells on microscopic examination of vaginal fluid

163

What are some risk factors for uterine fibroid development?

Increased BMI
Age in 40s
Black ethnicity

164

What are risk factors for ovarian cancer?

BRCA1/2 mutations
Increasing age
FH ovarian cancer
FH breast cancer
Never used OCP
Lynch II syndrome

165

What are risk factors for ovarian cyst formation?

Pre menopausal age group
Early menarche
First trimester of pregnancy
Personal hx of infertility or PCOS
Increased intrinsic or extrinsic gonadotrophins
Tamoxifen therapy
Personal or family hx of endometriosis

166

What is hydrops fetalis?

Abnormal amounts of fluid build up in two or more body areas of a fetus or newborn
Immune: complication of Rh incompatibility
Nonimmune: more common, heart or lung problems, severe anemia (e.g. from thalassemia or infections), and genetic or developmental problems, including Turner syndrome

167

What checks are performed in a routine antenatal check?

Fundal height
Foetal movements
BP
Urine dip
Liquor
Lie
Presentation
Engagement

168

What are possible reasons for an uncomplicated pregnancy still ongoing more than 2 weeks after due date?

Patient declines induction of labour
No appointment slots available for induction
Cervix unfavourable and pt and obstetrician prefer to delay induction

169

What are the different types of lochia produced after delivery? What does each contain and what is the consistency/colour?

Lochia rubra: blood, foetal membranes, decidua, vernix caseosa. Red in colour, lasts 3-5 days
Lochia serosa: serous exudate, erythrocytes, cervical mucous. Thinned, turned brown/pink, lasts to day 10
Lochia Alba: leukocytes, epithelial cells, cholesterol, fat, mucous, microorganisms. White/yellow, from week 2-6

170

What is the single most important risk factor for post partum maternal infection?

Delivery by cesarean section

171

What are risk factors for endometritis?

Cesarean delivery
Young age
Low SES
Prolonged labour
Prolonged rupture of membranes
Multiple vaginal examinations
Placement of intrauterine catheter
Pre existing infection
Colonisation of lower genital tract
Twin delivery
Manual removal of placenta

172

What are risk factors for post partum psychiatric illness?

Unwanted pregnancy
Feeling unloved by mate
Age under 20
Unmarried status
Low self esteem
Economic problems
Limited parental support
Past or present emotional problems

173

If a cervical smear shows borderline or mild dyskaryosis what needs to be done?

Send sample for HPV test
If negative back to routine recall
If positive refer for colposcopy

174

If a cervical smear shows moderate or severe dyskaryosis what needs to be done?

Consistent with CIN II moderate
CIN III severe
Refer for colposcopy

175

What are high risk subtypes of HPV for cervical cancer?

16, 18 and 33

176

What cell type are most cervical cancers derived from?

Squamous cell carcinoma

177

What are risk factors for cervical cancer?

Young at first intercourse
Multiple sexual partners
Smoking
Long term use of COCP
Immunosuppression and HIV
Low SES
HPV: STI

178

How is HPV oncogenic?

HPV 16 and 18 produce proteins E6 and 7 which suppose products of p53 in keratinocytes

179

Describe the natural history of cervical cancer

HPV may cause CIN
CIN 1 can regress spontaneously
CIN 3: can progress to invasion

180

Where does cervical cancer most commonly occur?

Transformation zone

181

What determines whether a cervical smear result is CIN 1, 2 or 3?

The thickness of abnormal cells
Histological diagnosis

182

How is cervical screening performed?

Cells collected from cervix by liquid based cytology

183

How regularly does cervical screening occur?

25 to 49 every 3 years
50 to 64 every 5 years
65+ as required for those with recent abnormal tests
Woman who have not had an adequate screening test since age 50 may be screened on request

184

If a cervical screen report says inadequate, when should it be repeated?

3 months

185

Under which circumstances should a patient be referred to hospital following a cervical smear?

Inadequate smear on 3 occasions
Moderate dyskaryosis
Severe dyskaryosis
Abnormal glandular cells present
Suspicion of invasive disease

186

What features on colposcopy would suggest CIN or invasion?

Abnormal vascular pattern: mosaicism, punctation
Abnormal staining of tissue: aceto white, brown iodine

187

What is the treatment for CIN?

Destructive: cryocautery, diathermy, laser vaporisation
Excisional: LLETZ (large loop excision of transformation zone), cold knife cone

188

What are risks of large loop excision of transformation zone for treatment of CIN?

Bleeding
Infection
Cervical stenosis
Pre term birth
Mid trimester miscarriage

189

What is the follow up after treatment of CIN?

Smear and HPV test of cure at 6 months

190

What hormone results would you expect in a pregnant lady?

LH and FSH normal
Oestrogen raised
Prolactin raised
Testosterone normal

191

What are your differentials if a patient is amenorrhoeic but hormone studies are all normal?

Uterine or vaginal abnormalities
Imperforate hymen
Absent uterus
Lack of endometrium