Validating the safety of low-dose CTPA in pregnancy: results from the OPTICA (Optimised CT Pulmonary Angiography in Pregnancy) Study.

BACKGROUND: Pulmonary embolism (PE) is a leading cause of pregnancy-related mortality. CT pulmonary angiogram (CTPA) is the first-line advanced imaging modality for suspected PE in pregnancy at institutes offering low-dose techniques; however, a protocol balancing safety with low dose remains undefined. The wide range of CTPA doses reported in pregnancy suggests a lack of confidence in implementing low-dose techniques in this group. PURPOSE: To define and validate the safety, radiation dose and image quality of a low-dose CTPA protocol optimised for pregnancy. MATERIALS AND METHODS: The OPTICA study is a prospective observational study. Pregnant study participants with suspected PE underwent the same CTPA protocol between May 2018 and February 2022. The primary outcome, CTPA safety, was judged by the reference standard; the 3-month incidence of venous thromboembolism (VTE) in study participants with a negative index CTPA. Secondary outcomes defined radiation dose and image quality. Absorbed breast, maternal effective and fetal doses were estimated by Monte-Carlo simulation on gestation-matched phantoms. Image quality was assessed by signal-to-noise and contrast-to-noise ratios and a Likert score for pulmonary arterial enhancement. RESULTS: A total of 116 CTPAs were performed in 113 pregnant women of which 16 CTPAs were excluded. PE was diagnosed on 1 CTPA and out-ruled in 99. The incidence of recurrent symptomatic VTE was 0.0% (one-sided 95% CI, 2.66%) at follow-up. The mean absorbed breast dose was 2.9 ± 2.1mGy, uterine/fetal dose was 0.1 ± 0.2mGy and maternal effective dose was 1.4 ± 0.9mSv. Signal-to-noise ratio (SNR) was 11.9 ± 3.7. Contrast-to-noise ratio (CNR) was 10.4 ± 3.5. CONCLUSION: The OPTICA CTPA protocol safely excluded PE in pregnant women across all trimesters, with low fetal and maternal radiation. CLINICAL RELEVANCE: OPTICA (Optimised CT Pulmonary Angiography in Pregnancy) is the first prospective study to define the achievable radiation dose, image-quality and safety of a low-dose CT pulmonary angiogram protocol optimised for pregnancy (NCT04179487). It provides the current benchmark for safe and achievable CT pulmonary angiogram doses in the pregnant population. KEY POINTS: • Despite the increased use of CT pulmonary angiogram in pregnancy, an optimised low-dose protocol has not been defined and reported doses in pregnancy continue to vary widely. • The OPTICA (Optimised CT Pulmonary Angiography in Pregnancy) study prospectively defines the achievable dose, image quality and safety of a low-dose CT pulmonary angiogram protocol using widely available technology. • OPTICA provides a benchmark for safe and achievable CT pulmonary angiogram doses in the pregnant population.

Intermediate-dose versus low-dose low-molecular-weight heparin in pregnant and post-partum women with a history of venous thromboembolism (Highlow study): an open-label, multicentre, randomised, controlled trial.

BACKGROUND: Pregnancy-related venous thromboembolism is a leading cause of maternal morbidity and mortality, and thromboprophylaxis is indicated in pregnant and post-partum women with a history of venous thromboembolism. The optimal dose of low-molecular-weight heparin to prevent recurrent venous thromboembolism in pregnancy and the post-partum period is uncertain. METHODS: In this open-label, randomised, controlled trial (Highlow), pregnant women with a history of venous thromboembolism were recruited from 70 hospitals in nine countries (the Netherlands, France, Ireland, Belgium, Norway, Denmark, Canada, the USA, and Russia). Women were eligible if they were aged 18 years or older with a history of objectively confirmed venous thromboembolism, and with a gestational age of 14 weeks or less. Eligible women were randomly assigned (1:1), before 14 weeks of gestational age, using a web-based system and permuted block randomisation (block size of six), stratified by centre, to either weight-adjusted intermediate-dose or fixed low-dose low-molecular-weight heparin subcutaneously once daily until 6 weeks post partum. The primary efficacy outcome was objectively confirmed venous thromboembolism (ie, deep-vein thrombosis, pulmonary embolism, or unusual site venous thrombosis), as determined by an independent central adjudication committee, in the intention-to-treat (ITT) population (ie, all women randomly assigned to treatment). The primary safety outcome was major bleeding which included antepartum, early post-partum (within 24 h after delivery), and late post-partum major bleeding (24 h or longer after delivery until 6 weeks post partum), assessed in all women who received at least one dose of assigned treatment and had a known end of treatment date. This study is registered with ClinicalTrials.gov, NCT01828697, and is now complete. FINDINGS: Between April 24, 2013, and Oct 31, 2020, 1339 pregnant women were screened for eligibility, of whom 1110 were randomly assigned to weight-adjusted intermediate-dose (n=555) or fixed low-dose (n=555) low-molecular-weight heparin (ITT population). Venous thromboembolism occurred in 11 (2%) of 555 women in the weight-adjusted intermediate-dose group and in 16 (3%) of 555 in the fixed low-dose group (relative risk [RR] 0·69 [95% CI 0·32-1·47]; p=0·33). Venous thromboembolism occurred antepartum in five (1%) women in the intermediate-dose group and in five (1%) women in the low-dose group, and post partum in six (1%) women and 11 (2%) women. On-treatment major bleeding in the safety population (N=1045) occurred in 23 (4%) of 520 women in the intermediate-dose group and in 20 (4%) of 525 in the low-dose group (RR 1·16 [95% CI 0·65-2·09]). INTERPRETATION: In women with a history of venous thromboembolism, weight-adjusted intermediate-dose low-molecular-weight heparin during the combined antepartum and post-partum periods was not associated with a lower risk of recurrence than fixed low-dose low-molecular-weight heparin. These results indicate that low-dose low-molecular-weight heparin for thromboprophylaxis during pregnancy is the appropriate dose for the prevention of pregnancy-related recurrent venous thromboembolism. FUNDING: French Ministry of Health, Health Research Board Ireland, GSK/Aspen, and Pfizer.

Left ventricular dysfunction in Duchenne muscular dystrophy.

BACKGROUND: Duchenne muscular dystrophy is associated with progressive cardiorespiratory failure, including left ventricular dysfunction. METHODS AND RESULTS: Males with probable or definite diagnosis of Duchenne muscular dystrophy, diagnosed between 1 January, 1982 and 31 December, 2011, were identified from the Muscular Dystrophy Surveillance Tracking and Research Network database. Two non-mutually exclusive groups were created: patients with ≥2 echocardiograms and non-invasive positive pressure ventilation-compliant patients with ≥1 recorded ejection fraction. Quantitative left ventricular dysfunction was defined as an ejection fraction <55%. Qualitative dysfunction was defined as mild, moderate, or severe. Progression of quantitative left ventricular dysfunction was modelled as a continuous time-varying outcome. Change in qualitative left ventricle function was assessed by the percentage of patients within each category at each age. Forty-one percent (n = 403) had ≥2 ejection fractions containing 998 qualitative assessments with a mean age at first echo of 10.8 ± 4.6 years, with an average first ejection fraction of 63.1 ± 12.6%. Mean age at first echo with an ejection fraction <55 was 15.2 ± 3.9 years. Thirty-five percent (140/403) were non-invasive positive pressure ventilation-compliant and had ejection fraction information. The estimated rate of decline in ejection fraction from first ejection fraction was 1.6% per year and initiation of non-invasive positive pressure ventilation did not change this rate. CONCLUSIONS: In our cohort, we observed that left ventricle function in patients with Duchenne muscular dystrophy declined over time, independent of non-invasive positive pressure ventilation use. Future studies are needed to examine the impact of respiratory support on cardiac function.

A Lean Approach to Improve Medication Administration Safety by Reducing Distractions and Interruptions.

BACKGROUND: Medication errors are potentially avoidable incidents that can lead to harm. Medications are often administered under challenging conditions, which creates opportunities for distractions and interruptions. PURPOSE: The aim of this study was to reduce the number of interruptions and distractions experienced by nurses during the medication administration process. METHODS: A Lean approach was used to value stream map the process, devise solutions, and measure the impact of the change. RESULTS: Sources of distraction and interruption were identified. Through collaboration the medication administration process was standardized, and a purpose-built medication administration room was developed. Frequency of interruptions and distractions from all sources was reduced. CONCLUSIONS: Value stream mapping the process enabled the identification of non-value-added activities that were threats to the integrity of the process. Standardizing the medication administration process and creating a safe space to facilitate the process successfully reduced interruptions and distractions from all sources.

Risky Business? A Year-Long Study of Adult Voluntary Admissions Who Leave Psychiatric in-Patient Care without Informing Staff.

Patients leaving inpatient psychiatric care without informing staff can have serious consequences for patient welfare, their families and staff. Even in cases where there are no serious outcomes and patients return, treatment can be interrupted and staff morale compromised. Given these potential deleterious effects, it is important to have an in-depth understanding of why people leave when they do. The aim of this study is to examine the profile of service-users who leave in-patient psychiatric care without notifying staff and to determine their reasons for doing so, what they did when they left the hospital setting and reasons for returning. This is a prospective descriptive study of service users leaving without notifying staff from a national mental health service in Ireland. It investigated the frequency, timing, and motivations of these absconding events among a sample of in-patients over a 12-month period. This year-long review identified 75 episodes of leaving without notifying staff, 55 of which met this studies criteria. 22% of episodes were from a locked unit, 58.2% were repeated episodes. 89% of service users returned to hospital following the episode and 11% were discharged against medical advice. Although no fatalities, three service users were seen in an emergency department as a result of activity during leave. Upon return from leave, all service users were reviewed and their care plans were updated where necessary.

A population survey of prevalence rates of antenatal depression in the Irish obstetric services using the Edinburgh Postnatal Depression Scale (EPDS).

Ireland has the second-highest birth rate in Europe and poorly developed perinatal psychiatry services. There are no screening services for antenatal depression and no data available on prevalence rates of depression among women attending the Irish obstetric services. The aim of this study was to assess the prevalence rates of depression during pregnancy in a population sample in Ireland using the Edinburgh Postnatal Depression Scale (EPDS) as a screening tool. Pregnant women during all stages of pregnancy were recruited from five maternity hospitals throughout the Republic of Ireland. Approximately 5000 EPDS questionnaires were collected. Information on the participant's age, gestational week, gravidity, parity, and level of education attained was also collected. A score of > 12 was used as a measure of probable depression. Overall, 15.8% of pregnant women scored > 12 in the EPDS. There was a significant association between gestational week and rates of depression, with increasing rates occurring with advancing pregnancy (p < 0.001). Overall, higher socioeconomic groups were over-represented in the sample although we replicated the well-established findings of higher EPDS scores in women with lower educational attainment (p < 0.005). This study demonstrates that prevalence rates of probable antenatal depression are high among women attending the obstetric services in Ireland and highlight the importance of increasing awareness of antenatal depression. These high rates of antenatal depression may be related to certain conditions that are specific to an Irish setting: the absence of screening for depression in the context of grossly under-resourced perinatal psychiatry services. These findings provide indirect confirmatory evidence for the need for streamlined mental health services within reproductive health services.

How Good Is Your Rule of Thumb? Validating Male-to-Female Case Ratio as a Proxy for Men Who Have Sex With Men Involvement in N. gonorrhoeae Incidence at the County Level.

BACKGROUND: Lacking information on men who have sex with men (MSM) for most reported cases, sexually transmitted disease (STD) programs in the United States have used crude measures such as male-to-female case ratios (MFCR) as a rule of thumb to gauge MSM involvement at the local level, primarily with respect to syphilis cases in the past. Suitability of this measure for gonorrhea incidence has not previously been investigated. METHODS: A random sample of gonorrhea cases reported from January 2010 through June 2013 were interviewed in selected counties participating in the STD Surveillance Network to obtain gender of sex partners and history of transactional sex. Weighted estimates of proportion of cases among MSM and proportion reporting transactional sex were developed; correlation between MFCR and proportion MSM was assessed. RESULTS: Male-to-female case ratio ranged from 0.66 to 8.7, and the proportion of cases occurring among MSM varied from 2.5% to 62.3%. The MFCR was strongly correlated with proportion of cases among MSM after controlling for transactional sex (Pearson partial r = 0.754, P < 0.0001). CONCLUSIONS: Male-to-female case ratio for gonorrhea at the county level is a reliable proxy measure indicating MSM involvement in gonorrhea case incidence and should be used by STD programs to tailor their programmatic mix to include MSM-specific interventions.

Adjustment of therapeutic LMWH to achieve specific target anti-FXa activity does not affect outcomes in pregnant patients with venous thromboembolism.

Venous thromboembolism (VTE) remains a leading cause of maternal morbidity and mortality in the developed world. Low molecular weight heparins (LMWH) are routinely used to provide therapeutic anticoagulation during pregnancy for women with VTE, with measurement of plasma anti-FXa activity used to guide dosing in certain patient groups. There is limited evidence to support the use of anti-FXa monitoring in pregnant patients. This study seeks to ascertain whether anti-FXa monitoring of pregnant patients with VTE influences patient outcomes. We performed a single-centre case series including two consecutive groups of pregnant patients treated with LMWH for VTE sustained in the index pregnancy with and without monitoring of anti-FXa levels. 35,394 patients delivered during the study period in a large urban stand-alone maternity hospital, with 26 cases of VTE eligible for inclusion. There was no significant difference between the two groups in any clinical outcome; including maternal blood loss at delivery, recurrent thromboembolic events or rates of planned delivery. These data provide clinical evidence to support current international guideline recommendations that measurement of plasma anti-FXa activity in the majority of patients receiving therapeutic-intensity antenatal LMWH is not warranted.

Thrombocalc: implementation and uptake of personalized postpartum venous thromboembolism risk assessment in a high-throughput obstetric environment.

INTRODUCTION: Venous thromboembolism risk assessment (VTERA) is recommended in all pregnant and postpartum women. Our objective was to develop, pilot and implement a user-friendly electronic VTERA tool. MATERIAL AND METHODS: We developed "Thrombocalc", an electronic VTERA tool using Microsoft EXCEL™ . Thrombocalc was designed as a score-based tool to facilitate rapid assessment of all women after childbirth. Calculation of a total score estimated risk of venous thromboembolism in line with consensus guidelines. Recommendations for thromboprophylaxis were included in the VTERA output. Implementation was phased. Uptake of the VTERA tool was assessed prospectively by monitoring the proportion of women who gave birth in our institution and had a completed risk assessment. Factors affecting completion and accuracy of risk assessments were also assessed. RESULTS: Thrombocalc was used prospectively to risk-assess 8380 women between September 2014 and December 2015. Compliance with this tool increased dramatically throughout the study period; over 92% of women were risk-assessed in the last quarter of data collection. Compliance was not adversely affected if delivery took place out of working hours [adjusted odds ratio (aOR) 1.03, 95% confidence interval (CI) 0.93-1.14]. Risk assessment was less likely in the case of cesarean deliveries (aOR 0.66, 95% CI 0.60-0.73) and stillborn infants (aOR 0.48, 95% CI 0.29-0.79). Misclassification of risk factors led to approximately 207 (2.5%) inaccurate thromboprophylaxis recommendations. CONCLUSIONS: Our electronic, score-based VTERA tool provides a highly effective mechanism for rapid assessment of individual postpartum venous thromboembolism risk in a high-throughput environment.

Outcome of pregnancy in women diagnosed with idiopathic polyhydramnios.

INTRODUCTION: Polyhydramnios is present in approximately 2% of pregnancies and it has been associated with a variety of adverse pregnancy outcomes. OBJECTIVES: The aim of our study was to evaluate the association between polyhydramnios and adverse pregnancy outcomes. METHODS: This was a retrospective case control study of 288 singleton pregnancies delivered in the Rotunda Hospital, Dublin, between 2013 and 2014. Polyhydramnios was defined as: (i) amniotic fluid index (AFI) ≥ 25 cm; (ii) maximal vertical pocket (MVP) of ≥8 cm; and (iii) a gestational age-specific threshold for AFI. Demographic information, obstetric and neonatal outcomes were obtained by review of hospital databases. Exclusion criteria included gestational or pre-existing diabetes, multiple pregnancy, carrying a fetus with structural or chromosomal abnormalities, Rhesus factor isoimmunisation, and TORCH screen positive. Outcomes were compared with outcomes of those without polyhydramnios. RESULTS: A total of 8798 deliveries occurred during the study period. The frequency of polyhydramnios was 1.6%. One hundred and forty-four women were selected in each group. There was no significant difference in preterm deliveries, low birth weight, low Apgar score at one minute and five minutes and perinatal mortality. However, increase in caesarean delivery rate (43.1% vs 21.5%), number of fetal distresses (17.4% vs 6.9%) and number of neonatal intensive care unit (NICU) admissions (17.4% vs 4.9%) were observed in our study. CONCLUSION: In conclusion, idiopathic polyhydramnios is associated with specific adverse outcomes, such as higher rate of caesarean delivery, fetal distress and NICU admissions. Therefore, close surveillance of these pregnancies is required, especially near term.

Haemorrhagic and thrombotic complications in pregnant women with acquired and congenital cardiac disease.

BACKGROUND: Pregnant patients with cardiac disease have significantly higher predicted maternal morbidity and mortality compared to the general obstetric population. Published guidelines on optimal management of these patients recommend multidisciplinary care provision. There are few published data on the incidence of haematological complications in pregnant women with cardiac disease, although the data that does exist suggests a relatively high rate of bleeding and thrombotic events. AIMS: To determine the outcomes in terms of haematological morbidity occurring within a cohort of pregnant women with cardiac disease in the setting of multidisciplinary care provision. METHODS: Patients were identified from a database compiled by the obstetric cardiology service listing all cardiac patients managed in the Rotunda maternity hospital during the period from 2004 to 2011. Data were obtained from the medical and obstetric case notes relating to details of perinatal care and the occurrence of antenatal and postnatal complications. RESULTS: During the 8-year review period, 451 women with cardiac disease were assessed. Fifty-nine were determined to have moderate to high-risk disease. Each received consultant-delivered multidisciplinary care, where written management strategies were agreed by collaborating senior colleagues either preconceptually or in early pregnancy. No venous thromboembolic events occurred and a modest rate of post-partum haemorrhage (approximately 5%) was recorded. There were no maternal deaths. CONCLUSION: The relatively favourable outcomes observed within our institution highlight the importance of a multidisciplinary approach to the management of pregnant women with cardiac disease, particularly in scenarios where limited published evidence exists to guide management.

The effect of maternal subclinical hypothyroidism on IQ in 7- to 8-year-old children: A case-control review.

BACKGROUND: In Ireland, pregnant women are not routinely screened for subclinical hypothyroidism (SCH). AIM: Our objective was to compare the intelligence quotient (IQ) of children whose mothers had been diagnosed with SCH prenatally with matched controls using a case-control retrospective study. MATERIALS AND METHODS: In a previous study from our group, 1000 healthy nulliparous women were screened anonymously for SCH. This was a laboratory diagnosis involving elevated TSH with normal fT4 or normal TSH with hypothyroxinaemia. We identified 23 cases who agreed to participate. These were matched with 47 controls. All children underwent neurodevelopmental assessment at age 7-8. Wechsler Intelligence Scale for Children IV assessment scores were used to compare the groups. Our main outcome measure was to identify whether there was a difference in IQ between the groups. RESULTS: From the cohort of cases, 23 mothers agreed to the assessment of their children as well as 47 controls. The children in the control group had higher mean scores than those in the case group across Verbal Comprehension Intelligence, Perceptual Reasoning Intelligence, Working Memory Intelligence, Processing Speed Intelligence and Full Scale IQ. Mann-Whitney U-test confirmed a significant difference in IQ between the cases (composite score 103.87) and the controls (composite score 109.11) with a 95% confidence interval (0.144, 10.330). CONCLUSIONS: Our results highlight significant differences in IQ of children of mothers who had unrecognised SCH during pregnancy. While our study size and design prevents us from making statements on causation, our data suggest significant potential public health implications for routine prenatal screening.

A comprehensive analysis of common genetic variation around six candidate loci for intrahepatic cholestasis of pregnancy.

OBJECTIVES: Intrahepatic cholestasis of pregnancy (ICP) has a complex etiology with a significant genetic component. Heterozygous mutations of canalicular transporters occur in a subset of ICP cases and a population susceptibility allele (p.444A) has been identified in ABCB11. We sought to expand our knowledge of the detailed genetic contribution to ICP by investigation of common variation around candidate loci with biological plausibility for a role in ICP (ABCB4, ABCB11, ABCC2, ATP8B1, NR1H4, and FGF19). METHODS: ICP patients (n=563) of white western European origin and controls (n=642) were analyzed in a case-control design. Single-nucleotide polymorphism (SNP) markers (n=83) were selected from the HapMap data set (Tagger, Haploview 4.1 (build 22)). Genotyping was performed by allelic discrimination assay on a robotic platform. Following quality control, SNP data were analyzed by Armitage's trend test. RESULTS: Cochran-Armitage trend testing identified six SNPs in ABCB11 together with six SNPs in ABCB4 that showed significant evidence of association. The minimum Bonferroni corrected P value for trend testing ABCB11 was 5.81×10(-4) (rs3815676) and for ABCB4 it was 4.6×10(-7)(rs2109505). Conditional analysis of the two clusters of association signals suggested a single signal in ABCB4 but evidence for two independent signals in ABCB11. To confirm these findings, a second study was performed in a further 227 cases, which confirmed and strengthened the original findings. CONCLUSIONS: Our analysis of a large cohort of ICP cases has identified a key role for common variation around the ABCB4 and ABCB11 loci, identified the core associations, and expanded our knowledge of ICP susceptibility.

Risk factors for pregnancy-associated venous thromboembolism: a review.

AIM: To critically evaluate current understanding of risk factors for pregnancy-associated venous thromboembolism (VTE) and to describe underlying molecular mechanisms. METHODS: A literature search was undertaken using the national library of medicine PubMed database. The search terms used were "pregnancy" and "venous thromboembolism". Following exclusion of unsuitable data sources, studies were identified that described specific risk factors for pregnancy-associated VTE and suggested possible underlying molecular mechanisms. Adjusted odds ratios and incident rate ratios for these specific risk factors were identified in each study and tabulated. RESULTS: A series of mainly retrospective cohort and case control studies over the past two decades have reported specific risk factors for pregnancy-associated VTE. Recent published literature has highlighted the interaction between commonly occurring risk factors, particularly the potential for a multiplicative effect on overall VTE risk, and have led to improvements in our understanding of the molecular mechanisms underlying these risk factors. CONCLUSION: Mortality from pregnancy associated VTE continues despite prevention strategies. A detailed understanding of specific risk factors, their interactions and underlying molecular mechanisms is required to identify women at highest risk and to guide development of thromboprophylaxis strategies.

Private practice dietetics: A scoping review of the literature.

AIM: Private practice is one of the most rapidly growing, but under-researched employment sectors for graduate dietitians in Australia, limiting evidence-based workforce development. This scoping review examines existing international literature to gain an understanding of the current private practice workforce size, distribution, demography and workforce development considerations, including competencies, supply and demand, remuneration and professional development activities. METHODS: The databases MEDLINE, EMBASE, CINAHL, EMCARE, PsycInfo (Ovid) and grey literature were systematically searched in August 2023 using key search terms to identify studies for inclusion. Articles were included if they related to private practice dietetics and described an aspect of workforce. Original research, government and organisational reports, statements of practice and websites providing governmental or organisational statistics were included. A directed content analysis and qualitative constant comparison technique were used to deductively map intelligence sources against a workforce development framework. A gap analysis was also conducted to provide a focus for future workforce development research. RESULTS: A total of 72 peer-reviewed and grey literature sources were included, with 65% of the studies being Australian-based publications. Private practice dietetics research interest has increased in the last decade. Despite a breadth of published sources, this review found little published data on workforce size, distribution, demography, supply, demand, continued professional development and remuneration, indicating a significant gap in the evidence base. Existing literature focuses on workforce challenges and barriers, the work of private practice dietitians, with limited exploration of competency requirements for graduate private practitioners. CONCLUSIONS: The literature on the private practice dietetics workforce is lacking worldwide, which constrains evidenced-based workforce development initiatives. Workforce development research across all workforce aspects is warranted to address current evidence gaps.

The importance of collaboration in maternal medicine: A retrospective descriptive study of a maternal multidisciplinary team meeting.

OBJECTIVE: In the present study we aimed to review the evolution and function of the maternal medicine multidisciplinary team (MMMDT) meeting of a maternal medicine service of a tertiary level stand-alone maternity hospital. METHODS: We conducted a retrospective descriptive study of all minutes of MMMDT meetings from 2014 to 2020, with the aim of evaluating meeting characteristics and patient demographics. RESULTS: There were 575 multidisciplinary team (MDT) discussions of 486 women during 43 meetings in the 7 year period. On average, 13 (range 3-23; SD = 5.28) women were discussed at each meeting, attended by 17 (range: 11-27; SD = 4.26) attendees. There were 18 women discussed during successive pregnancies. When analyzing the 2017-2020 data, preconceptual discussions made up 7.3% (n = 42) of patients discussed, with 5.7% (n = 33) being postnatal. The mean maternal age was 32.5 years (range 15-48 years) and women were most likely to be discussed in the mid-trimester period (21-24 weeks gestation). The top five primary specialities involved were hematology, neurology, rheumatology, neurosurgery and gastroenterology; however, 22 specialities were represented overall when classified by the primary medical condition. When examining the MDT input, hematology input was required in 144 patients (25.0%), radiology in 161 (28.0%) patients, and 117 in anesthesiology (20.3%). When examining the number of teams required to manage the patient, 80 women required the input of three specialities, with 16 women requiring the input of four specialities. CONCLUSION: We demonstrate the value and role of the MDT in the management of complex patients, providing a forum to discuss care in all phases of the obstetric journey.

VTE risk assessment, prevention and diagnosis in pregnancy.

Venous thromboembolism (VTE) is still reported as the leading cause of direct maternal death in pregnancy in serial international reports in developed countries. VTE risk is higher during pregnancy but is further increased by additional well-characterized risk factors. International guidelines recommend that formal VTE risk assessment should be conducted at least in early pregnancy, at delivery and when risk factors change. High quality data supporting optimal VTE prevention strategies are lacking, outside the setting of prevention of VTE recurrence. Moreover, recent high-quality studies have provided much-needed data on diagnostic strategies for pulmonary embolism (PE) in pregnancy. In this review, we summarize knowledge gaps and recently published data in the prevention and diagnosis of VTE in pregnancy. Moreover, we describe ongoing high-quality randomised trials and prospective clinical management studies in this area. High quality clinical studies and trials in pregnancy can be done and must be prioritised, through international network efforts and national funding advocacy. Ultimately, translation of study results to impact upon guidelines and policy will deliver better care to and will protect the lives and health of pregnant people and those contemplating pregnancy throughout the world.

The correlation of ultrasonographic placental architecture with placental histology in the low-risk primigravid population.

AIM: To determine the association, if any, between placental architecture findings assessed ultrasonographically at 22 and 36 weeks and placental histology. METHODS: There was prospective recruitment of 1011 low-risk primigravids from the antenatal clinic at the Rotunda Hospital, Dublin, Ireland. Ultrasound of the placenta was performed at 22 and 36 weeks and histological assessment was made of the placenta of all participants. RESULTS: Complete data pertaining to ultrasound and placental histology was available for 810 women (80%). Placental calcification on ultrasound in the third trimester was associated with a higher incidence of placental infarction identified following placental histology (80.0% vs. 21.5%; P=0.009: r=0.115). The placental thickness on ultrasound in the second trimester was less in cases complicated by chorioamnionitis (2.62 cm vs. 3.07 cm; P=0.039: r=-0.176). Chronic villitis was associated with a statistically significant increased incidence of antenatal placental infarction identified on ultrasound in the third trimester (10.7% vs. 1.9%; P=0.020: r=0.113). Intervillous thrombi occurred more frequently in cases with reduced placental thickness on ultrasound in the second trimester (3.0 cm vs. 3.3 cm; P=0.035: r=-0.171). CONCLUSIONS: Antenatal ultrasound of the placenta may aid detection of placental disease, particularly in the identification of placental infarction.

Subclinical hypothyroidism as a risk factor for placental abruption: evidence from a low-risk primigravid population.

BACKGROUND: Subclinical thyroid hypofunction in pregnancy has been shown to have an association with neurodevelopmental delay in the offspring. It is unclear whether obstetric factors may account for this observation. AIMS: To establish the prevalence of subclinical hypothyroidism (SCH) in a low-risk primigravid population and to explore its association with obstetric sequelae. MATERIALS AND METHODS: Nine hundred and fifty-three primigravid women had thyroid hormone indices analysed in the early second trimester. Delivery and neonatal outcomes were available for 904 women who met the criteria for inclusion in the study. Women with subclinical hypothyroidism (thyroid-stimulating hormone (TSH) values at or above the 98th percentile with a normal free thyroxine (fT4)) or isolated maternal hypothyroxinaemia (fT4 level at or below the second percentile with a normal-range TSH) were compared with biochemically euthyroid controls. Chi-squared test and analysis of variance were used for statistical analysis. RESULTS: The prevalence of SCH or isolated maternal hypothyroxinaemia was 4%. Positivity for antithyroid peroxidase (TPO) or antithyroglobulin (ATG) antibodies correlated with SCH status (P = 0.02). Placental abruption was observed more commonly in the setting of either SCH or isolated maternal hypothyroxinaemia when compared with euthyroid controls (P = 0.02 and 0.04, respectively). CONCLUSIONS: Subclinical hypothyroidism and isolated maternal hypothyroxinaemia are associated with placental abruption. The observation of these effects in this healthy low-risk population lends weight to the case for antenatal screening for diminished thyroid reserve.