saving babies’ lives · professor asma khalil st george’s hospital, university of london, uk....
TRANSCRIPT
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Saving Babies’ Lives
Professor Asma KhalilSt George’s Hospital, University of London, UK
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Neonatal mortality (under 28-day-olds)2.8 deaths per 1,000 live births in 2017, rising 0.1 per year since 2014.
Stillbirth2873 stillbirths in 2017; 4.2 per 1,000 births. Down slightly from 4.4 in 2016.
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The UK ranks 24th out of 49 high income countries in terms of stillbirth rates, with around one in 250 pregnancies ending in stillbirth after 24 weeks of pregnancy.
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Smoking cessation
CO Testing at booking and opt
out referral pathway
Identification and surveillance of
fetal growth restriction
GAP / GrowProgramme
Perinatal Institute
Reduced fetal movement
pathwayand Leaflet
Fetal monitoring
Staff training and
competency assessment Fresh Eyes
Stillbirth Care Bundle
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Growth Assessment Protocol (GAP)
• 3 elements:• Customised Growth Charts• Online training and competency log• Rolling audit
• Low-risk pregnancies: fundal height• High-risk pregnancies: serial scans
• Obesity• Maternal age and parity• Smoking• Pre-existing diabetes• Pre-existing hypertension• Antepartum haemorrhage • History of SGA or stillbirth
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Fetal Growth Competency Assessment
Knowledge of:Definitions of IUGR
Research evidence
Risk assessment at booking
Customised growth chart and referral criteria
Standardised fundal height measurement
Customised centile at birth and ongoing management
Demonstration of:Production of a GROW chart
Standardised fundal height measurement
Plotting measurements on a chart
Post test assessment
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• Early detection of growth problems can substantially reduce the risk of stillbirth• Cohort study in the West Midlands • June 2009 and May 2011 • RR of stillbirth halved from 8.0 to 4.0 when FGR is detected antenatally
Screening for FGR
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Gardosi J et al BMJ 2013
Growth Assessment Protocol (GAP)
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RCOG Green Top Guidelines
Analysis of West Midlands PEER Database 2
009‐11; n=161,936
Growth Assessment Protocol (GAP)
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Growth Assessment Protocol (GAP)
• 25% have one major or 3 minor risk factors• 3-weekly scans
• 60% of stillbirths had at least one of theserisk factors
• Increased rate:• SGA births (OR 2.0)• Stillbirths (OR 1.6)
• 1100 additional scans / 1000 births
• Increase in IOL
Growth Assessment Protocol (GAP)
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The DESiGN Trial DEtection of Small for GestatioNal age fetus(SGA) – a cluster randomised controlled trial to evaluate the effect of the GAP programme
Chief Investigators: Dharmintra PasupathyAsma KhalilProfessor Jane Sandall
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Detection of SGA at birth (birthweight <10th centile) that were
clinically detected antenatally (by ultrasound scan > 24 weeks)
DESIGN Trial
Primary outcome
Secondary outcomes•Clinical
•Maternal
•Neonatal
•Health Economics
•Implementation
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Stillbirth Care Bundle (version 2)
Smoking cessation
CO Testing at booking and
opt out referral pathway
Identification and
surveillance of fetal growth restriction
Awareness of reduced fetal
movement
Fetalmonitoring
Staff training and
competency assessment Fresh Eyes
Reducing preterm birth
From 8% to 6%
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• Closer surveillance or early delivery. • Currently recognised risk factors are extremely poor at predicting stillbirth; in the Stillbirth
Collaborative Research Network study 81% of stillbirths occurred in women without established risk factors in early pregnancy.
• Enable further stratification of care pathways, allowing antenatal surveillance and intervention to be tailored to those at high risk.
• Investigating promising preventative therapies, such as low-dose aspirin and early delivery. • Reassure the majority of pregnant women who are at low risk of an adverse perinatal outcome,
and possibly avoid unnecessary medical intervention or earlier delivery. • Abandon surveillance tests found to be ineffective (savings in time, effort and money).
Why is the identification of pregnancies at high-risk of stillbirth important?
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1. How can the structure and function of the placenta be assessed during pregnancy to detect potential problems and reduce the risk of stillbirth?
2. Does ultrasound assessment of fetal growth in the third trimester reduce stillbirth?
3. Do modifiable ‘lifestyle’ factors (e.g. diet, vitamin deficiency, sleep position, sleep apnea, lifting and bending) cause or contribute to stillbirth risk?
4. Which investigations identify a fetus at risk of stillbirth after a mother believes she has experienced reduced fetalmovements?
5. Can the wider use of existing tests and monitoring procedures, especially in later pregnancy, and the development and implementation of novel tests (biomarkers) in the mother or in early pregnancy, help prevent stillbirth?
6. What causes stillbirth in normally grown babies?7. What is the most appropriate bereavement and postnatal care for both parents following a stillbirth?
8. Which antenatal care interventions are associated with a reduction in the number of stillbirths?
9. Would more accessible evidence‐based information on signs and symptoms of stillbirth risk, designed to empower women to raise concerns with healthcare professionals, reduce the incidence of stillbirth?
10. How can staff support women and their partners in subsequent pregnancies, using a holistic approach to reduce anxiety, stress and any associated increased visits to healthcare settings?
11. Why is the incidence of stillbirth in the UK higher than in other similar high‐income countries, and what lessons can we learn from this?
Research priorities for stillbirth
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Accuracy of clinical characteristics, biochemical and ultrasound markers in the prediction of pre-eclampsia: an Individual Participant Data (IPD) Meta-analysis
International Prediction of Pre-eclampsia IPD Collaborative Network (IPPIC)
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IPD meta-analysis
Central collection, checking and analysis of individual patient data
All published and unpublished work
Observational studies, registry data and cohorts nested within randomised trials
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Collaborators
3
South America
6
Canada
5
USA
21
UK
41
Europe
2
Africa
3
Australia
2
Middle East
4
South East Asia
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Global support Networks
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Birth Cohorts
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Stillbirth Core outcome set
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Stage 1 Identifying Potential Outcomes
Systematic Review: What outcomes have been reported before?
Qualitative Patient Interviews: What outcomes should be reported?
Stage 2 Determining Core Outcomes
Modified Delphi Method: Combining professionals’ and patients’ views before?
Consensus meeting: Stakeholder consultation
Stage 3 Determining How Core Outcomes Should Be Measured
Quality Assessment: Ensuring outcome measures fit for purpose before?
Stakeholder Consultation: Final consensus
Core Outcomes Set for Interventions aiming to prevent Stillbirth
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Outcomes for the mother Outcomes for the offspringFetal loss (to include both miscarriage and stillbirth)
Timing of stillbirth - antepartum/intrapartum
Mode of delivery (to include induced/spontaneous and instrumental/vaginal/CS)
Neonatal mortality
Maternal mortality or near miss (according to WHO definition)
Gestational age at delivery
Psychological and social impact on the mother (assessed using a validated tool appropriate to context)
Birthweight
Women's knowledge Congenital anomaly NICU/SCBU/KMC or other higher level neonatal care length of stay (days)
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Significant additional risk of stillbirth, with no corresponding reduction in neonatal mortality, when term pregnancies continue to 41 weeks compared to delivery at 40 weeks.
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Induction of labour in low-risk nulliparous
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IOL in low risk nulliparous
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Low risk nulliparous38-38+6 weeks
IOL at 39-39+4wk(n=3062)
Expectant management(n=3044)
• Primary outcome: composite of perinatal death or severe neonatal complications• Principal secondary outcome: CS
IOL in low risk nulliparous
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IOL in low risk nulliparous
IOL Expectant management
Perinatal outcomeRR 0·8 (0.64-1.00)
0
1
2
3
4
5
6
4.3% 5.4%
IOL Expectant management
CS
RR 0.84 (0.76-0.93)
0
1
2
3
4
5
6
18.6% 22.2%
IOL at 39 weeks in low-risk nulliparous women:• ↓ CS• did not result in ↓ adverse perinatal outcome
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Induction of labour in older women
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IOL in older women
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Women ≥35 years old(n=619)
IOL at 39-39+6wk(n=305)
Expectant management(n=314)
• Primary outcome: CS• The trial was not designed or powered to assess the effects of IOL on stillbirth
IOL in older women
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IOL in older women
IOL Expectant management
CSRR 0·99 (0.87-1.14)
0
5
10
15
20
25
30
35
40
32% 33%
IOL Expectant management
Instrumental deliveryRR 1.30 (0.96-1.77)
0
5
10
15
20
25
30
35
40
38% 33%
• No maternal or infant deaths • No Significant differences in women’s experience of childbirth, adverse maternal or neonatal outcomes
IOL at 39 wk in women of advanced maternal age: • no significant effect on CS • no adverse short-term effects on maternal or neonatal outcomes
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What about twin pregnancy?
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Multiple pregnancy contributes disproportionately to stillbirths, neonatal death and cerebral palsy
% of Births 2%
7%
18%
% of Stillbirth
% of NND
6 timesCerebral palsy6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
1980 1985 1990 1995 2000 2005 2010 2015
(pe
r 1
00
0 t
ota
l bir
ths)
UK multiple birth rate 1980–2015
16 per 1000 total births
ONS 2015
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Stillbirth in twins
0
1
2
3
4
5
6
7
8
9
2014 2015 2016
Year
Singleton
Twins
Ne
on
ata
l m
ort
alit
y r
ate
pe
r 1
00
0 b
irth
0
2
4
6
8
10
12
2014 2015 2016
Singleton
Twins
Year
Stillb
irth
rate
pe
r 1
00
0 b
irth
Stillbirth ↓ 50%
NND ↓ 30%
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Stillbirth in twins
0
5
10
15
20
25
30
2013 2014 2015 2016
MC twin
DC twin
singleton
Sti
llb
irth
ra
te p
er
100
0 t
ota
l b
irth
s
0
2
4
6
8
10
12
14
16
18
20
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
Sti
llb
irth
ra
te p
er
100
0 t
ota
l b
irth
s
Year
Twins
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The hidden mortality of monochorionic twins
Fetuses (%) 12.2 1.8*
2.5*Pregnancies (%) 12.7
Fetal loss: DCMC
Fetuses (%) 2.8 1.6
2.8Pregnancies (%) 4.9
Perinatal loss:
* P<0.05
Stillbirth in Twins
Cu
mu
lative
lo
ss r
ate
(%
)
Gestation (weeks)
Monochorionic
Dichorionic
0
2
4
6
8
10
12
14
16
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Sebire NJ et al., BJOG 1997
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What are the causes of stillbirth?
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11.5%
2.3%
5.3%
5.3%
8.4%
11.7%
6.3%8.9%
1.4%
28.6%
3.7%6.4%
Specific placental conditions Specific fetal conditionsInfections Maternal disordersMechanical Antepartum or intrapartum haemorrhageHypertensive disorders of pregnancy Major congenital anomalyUnclassified UnexplainedAssociated obstetric factors IUGR
21.1%
11%
2.4%1.6%
3.3%
6.9%2.4%11.4%
0.4%
21.5%
8.1%
9.5%
Stillbirth in Twins
Singleton pregnancies Twin pregnancies
n=246 twins
n=3017 singletons
CMACE Report 2009
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Over half of stillbirths are related to impaired fetal growth secondary to placental dysfunction. Until recently, two thirds of stillbirths were considered ‘unexplained’ and therefore thought to be unavoidable. Using a new classification system, however, it has been demonstrated that 43% of stillborn babies were growth restricted.
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11-14 week• Dating, labelling
• Chorionicity
• Screening for trisomy 21
20-22 week
• Detailed anatomy
• Biometry
• Amniotic fluid volume
• Cervical length
24-26 week
28-30 week
• Assessment of fetal growth
• Amniotic fluid volume
• Fetal Doppler
36-37 week
Delivery
32-34 week
• Assessment of fetal growth
• Amniotic fluid volume
• Fetal Doppler
• Assessment of fetal growth
• Amniotic fluid volume
• Fetal Doppler
• Assessment of fetal growth
• Amniotic fluid volume
• Fetal Doppler
Dichorionic Twin Pregnancy Monochorionic Twin Pregnancy
11-14 week• Dating, labelling
• Chorionicity
• Screening for trisomy 21
20 week
• Detailed anatomy
• Biometry, DVP
• UA PI, MCA PSV
• Cervical length
28 week
30 week
34 week
32 week
16 week• Fetal growth, DVP
• UA PI
18 week• Fetal growth, DVP
• UA PI
• Fetal growth, DVP
• UA PI, MCA PSV
• Fetal growth, DVP
• UA PI, MCA PSV
• Fetal growth, DVP
• UA PI, MCA PSV
• Fetal growth, DVP
• UA PI, MCA PSV
22 week
24 week
26 week• Fetal growth, DVP
• UA PI, MCA PSV
• Fetal growth, DVP
• UA PI, MCA PSV
• Fetal growth, DVP
• UA PI, MCA PSV
36 week• Fetal growth, DVP
• UA PI, MCA PSV
Twin Pregnancy: ultrasound monitoring
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When should we deliver uncomplicated twins?
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• 25,946 twin gestations
• Delivery at:
• 36+0 - 36+6 weeks in MCDA
• 37+0 - 37+6 weeks in DCDA
Prospective risk of stillbirth/neonatal complications
Optimal Timing of Delivery
05
10
15
Ris
k (
x1
00
0)
34+0-34+6 35+0-35+6 36+0-36+6 37+0-37+6 38+0-38+6
GA (weeks)
34+0-34+6 35+0-35+6 36+0-36+6 37+0-37+6 38+0-38+6 39+0-39+6
GA (weeks)
stillbirth
neonatal death
Monochorionic Dichorionic
Cheong-See et al BMJ 2016
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Timing of Delivery in Multiple Pregnancy
• DCDA twins: from 37+0 wk
• MCDA twins : from 36+0 wk after a course of steroids
• MCMA twins : 32+0 to 33+6 wk after a course of steroids
• TCTA or DCTA triplet: from 35+0 wk after a course of steroids
NICE 2019
•If declines elective birth → weekly appointments with
specialist obstetrician• ultrasound scan (including assessment of AFV and umbilical artery doppler)
• fortnightly growth scans
National Institute for Health and Care Excellence (2019) Twin and triplet pregnancy. Available from https://www.nice.org.uk/guidance/ng137
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Update on national projects
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RCOG's national quality improvement programme to reduce the number of babies who die or are left severely disabled as a result of incidents occurring during term labour.
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71% babies might have had a different outcome with different care
On average 7 critical contributory factors for each baby where different care might have had made a difference to the outcome.
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• ↓ perinatal death• ↓ stillbirth• ↓ intrapartum stillbirth• ↓ unexplained stillbirth• Mortality rates remain high for Black and Asian babies
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Thank you
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