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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Retained Placenta and Postpartum Haemorrhage

Belachew, Johanna January 2015 (has links)
The aim was to explore the possibility to diagnose retained placental tissue and other placental complications with 3D ultrasound and to investigate the impact of previous caesarean section on placentation in forthcoming pregnancies. 3D ultrasound was used to measure the volumes of the uterine body and cavity in 50 women with uncomplicated deliveries throughout the postpartum period. These volumes were then used as reference, to diagnose retained placental tissue in 25 women with secondary postpartum haemorrhage. All but three of the 25 women had retained placental tissue confirmed at histopathology. The volume of the uterine cavity in women with retained placental tissue was larger than the reference in most cases, but even cavities with no retained placental tissue were enlarged (Studies I and II). Women with their first and second birth, recorded in the Swedish medical birth register, were studied in order to find an association between previous caesarean section and retained placenta. The risk of retained placenta with heavy bleeding (>1,000 mL) and normal bleeding (≤1,000 mL) was estimated for 19,459 women with first caesarean section delivery, using 239,150 women with first vaginal delivery as controls. There was an increased risk of retained placenta with heavy bleeding in women with previous caesarean section (adjusted OR 1.61; 95% CI 1.44-1.79). There was no increased risk of retained placenta with normal bleeding (Study III). Placental location, myometrial thickness and Vascularisation Index were recorded on 400 women previously delivered by caesarean section. The outcome was retained placenta and postpartum haemorrhage (≥1,000 mL). There was a trend towards increased risk of postpartum haemorrhage for women with anterior placentae. Women with placenta praevia had an increased risk of retained placenta and postpartum haemorrhage. Vascularisation Index and myometrial thickness did not associate (Study IV). In conclusion: 3D ultrasound can be used to measure the volume of the uterine body and cavity postpartum, but does not increase the diagnostic accuracy of retained placental tissue. Previous caesarean section increases the risk of retained placenta in subsequent pregnancy, and placenta praevia in women with previous caesarean section increases the risk for retained placenta and postpartum haemorrhage.
2

A systematic review of best practices in the acute management of postpartum haemorrhage in primary maternity care settings

Boltman-Binkowski, Haaritha January 2018 (has links)
Magister Curationis - MCur / Background: Postpartum haemorrhage (PPH) is one of the most preventable causes of maternal death, yet it still ranks as one of the main conditions responsible for maternal mortality. PPH occurs at a stage when a mother is the least likely to receive care, and mothers often do not survive to be referred to a more specialised level of care. This is compounded by the patient not being able to warn healthcare providers timeously about their condition and healthcare providers lacking training resulting in a lack of accuracy in diagnosis, lack of resources, and differing methods of treatment. Due to the lack of consensus in available treatment options, and the paucity of research aimed at clinical interventions for midwives at the primary care level, this research report aimed to investigate the evidence in order to establish the best practices and evidence for clinical interventions to manage postpartum haemorrhage for midwives at the primary care level. This is to ensure that the continuing education for midwives in practice is based on evidence to keep their skill set current and expose practitioners to the latest evidence based care. Aim: To systematically review all available published evidence for the acute non-pharmaceutical, non-surgical, management of PPH for use by midwives at a primary maternity care setting.
3

How much is too much? : exploring clinical recognition of excessive maternal blood loss during childbirth

Hancock, Angela January 2017 (has links)
Background: Postpartum haemorrhage (PPH) is the leading cause of maternal death worldwide. For every woman that dies, 20 or 30 more will experience morbidity. Severe PPH is increasing and is the leading cause of severe maternal morbidity in the UK. Rapid recognition of PPH is essential, but concealed bleeding, underestimation of blood loss and a failure to appreciate the physiological effects of blood loss, lead to delays in recognition and treatment. Experts believe that most deaths from PPH could be avoided by earlier diagnosis, but there is a lack of evidence on how to achieve this. Aims: To explore the experiences of those involved in evaluating blood loss during childbirth; and to develop and test a theory of blood loss evaluation and PPH recognition, as a prerequisite to developing strategies to support earlier diagnosis. Study Design: A sequential, exploratory mixed methods design was used. Methods: Qualitative methods included 8 focus groups and 19 one-to-one semi-structured interviews, conducted with 50 participants. These included: women and their birth partners (recruited from Liverpool Women's Hospital); and health professionals (midwives and obstetricians recruited from Saint Mary's Hospital, Manchester). A purposive sampling strategy was used to recruit women, who had experienced vaginal birth with or without PPH, and health professionals, with varying levels of experience in blood loss evaluation and PPH management. A snowball sampling strategy was used to recruit the birth partners of women participants. Phase one was completed from June to September 2014. All discussions were audio-recorded and transcribed verbatim. Data were managed using NVivo 10 qualitative data analysis software, which also supported the Framework approach to analysis and interpretation. Quantitative methods were used in phase two and involved 10 midwives and 11 obstetricians, recruited from Liverpool Women's Hospital, during February and March 2015. Two scenarios, one of fast and one of slow blood loss, were presented to the sample using clinical simulation with the NOELLE® childbirth simulator, in a pilot, randomised, cross-over study. Participants also completed three questions about the use of the NOELLE® mannequin for these types of scenarios. IBM SPSS Statistics version 23 software was used for quantitative data management and to estimate descriptive statistics. Numerical crossover data were copied into StatsDirect software, to perform the crossover analyses. Results: Women and birth partners were very perceptive to blood loss but felt ill-prepared for the reality of bleeding, with many experiencing negative emotional responses to both PPH and the lochia. Non-verbal communication from staff was used by women and their birth partners to interpret the seriousness of their blood loss. Health professionals: Recognition of PPH mainly occurs as an automatic response to the speed of blood flow. Volume of blood loss is often ascertained and used retrospectively after a PPH diagnosis, to validate the intuitive response and to guide and justify on-going decisions. This was confirmed by the simulation studies, where treatment was initiated at 100ml or less in all blood loss scenarios. Fast blood loss was more likely than slow blood loss to elicit a PPH response, despite volumes in the two groups being similar. Formal quantification of blood loss is not used routinely in practice. When it is used, values are often unofficially normalised to reflect health professionals' perceptions of the woman's clinical condition. Tools introduced to aid diagnosis, such as blood collection bags, routine weighing and the use of early warning scores, are not routinely used in the immediate post-birth period, especially if the woman and her blood loss are perceived to be normal. The tools are again used to validate intuitive feelings about blood loss and maternal condition. When they are used, the values are often modified if they contradict professional judgement. Conclusions: Women and birth partners want more information, open communication, and on-going support, to minimise the emotional impact of blood loss. For health professionals, the speed of blood loss is the crucial factor in PPH recognition rather than an accurate assessment of the volume of blood loss. The amount of visible blood is generally not initially interpreted as a volume, but is used to compare current blood losses to those previously witnessed. Experience therefore plays a crucial role in the decisions of whether blood loss is considered normal or excessive. Formal quantification of blood loss and regular recording of physiological observations do not occur routinely in the immediate post-birth period. Therefore, women with insidious blood loss can have delayed PPH diagnosis because they have a normal blood flow and exhibit minimal physiological changes, due to the compensatory mechanisms of shock. Often such women need to exhibit outward signs of physiological compromise, such as fainting or feeling unwell, before their physiological observations and blood loss are formally re-evaluated. Education of health professionals should highlight the common errors of judgement made during blood loss evaluation and provide feedback on cases of delayed recognition. Future research should examine normal postnatal bleeding in the hours following birth, and create visual aids for women to self-diagnose insidious blood loss. Training should focus on the skills of PPH recognition, particularly those with insidious blood loss and postnatal physiological assessments. Novel tools such as the shock index should be considered and evaluated as tools of assessment.
4

Postpartum Haemorrhage in Humanitarian Crises : Obstacles and facilitators to the adoption of the non-pneumatic anti-shock garment (NASG) into humanitarian settings

Lofthouse, Clare January 2014 (has links)
In 2013 around 289,000 women died from what was categorised as maternal complications. This figure is likely to be higher as only 40% of the world has an adequately function health reporting system (WHO et al 2014, p.1). Severe bleeding causes around 27% of all maternal deaths; this is the single biggest threat to pregnancy and childbirth. Moreover, maternal complications are the second biggest cause of death for women of reproductive age globally. The risks women and girls face through pregnancy and childbirth are the outcome of socio-cultural structures and norms, which increase the inequalities in many societies. The decisions we make, the choices we have, and the actions we carry out are a product of our social system’s structures and norms. Humanitarian crises painfully display the divisiveness and destruction that these structures and norms can have on the members of that system. But, crises also offer an opportunity to either, rebuild structures and norms in a way that reduces inequality and protects the vulnerable, or a regression to more traditional, more patriarchal and more hierarchical structures and norms which will ultimately disadvantage women and girls further in their plight for equality. There is a vicious circle of poverty and mortality that can be triggered by maternal death. In order to prevent these cycles from continuing, creative, simple and appropriate strategies need to be developed for humanitarian response that build on the knowledge systems and capacities of those affected, as well as the experience and expertise of practitioners. Instead of a discussion between development or humanitarian, the conversation should try to find ways for all interventions to be more homophilious with those affected and ensure that they do not worsen the structures protecting the most vulnerable. Innovation has long since been seen as a process for those who ‘have’, and not for those who ‘have not’. Criticisms of increasing inequality through a division based on socio-economic markers have only led to self-fulfilling stereotypes of who is innovative and who is not. This research is trying to shift the focus from one that is divisive to a more inclusionary approach. To address maternal mortality caused by severe bleeding, it is imperative to understand the context in which it is happening. Who is affected? Why? What do they think and believe? What happens to the family, the community? How are the structures and norms of the society affecting it? What solutions have been offered? In answering these questions it is clear how far the impact of maternal mortality can reach. It is the hope of this research, that its can be used to reduce and lessen this impact through better-targeted and tailored responses using appropriate tools – such as the non-pneumatic anti-shock garment, implemented in a mind frame of sustainability and resilience in an environment receptive to innovation. There is a need for fresh ideas and approaches to reduce a burden that does not exist in resource stable parts of the world, and a burden that has come to be seen as a problem of the poor. The non-pneumatic anti-shock garment is a game changer. It has the potential to inspire interest and access health systems, yet implementation thus far has been limited in humanitarian response. This research investigates maternal mortality caused by postpartum haemorrhage in humanitarian crises, in an endeavour to improve the discussion on including the NASG into the MISP as an appropriate tool to fight maternal mortality and the inequality that is found at its root.
5

Promotion of the Availability and Accessibility of Misoprostol under the CEDAW: Postpartum Haemorrhage among the Rural Women of the Kyrgyz Republic

Naamatova, Gulnaz 15 December 2011 (has links)
Maternal mortality in Kyrgyzstan is a discrimination of women not only based on sex, but also on rural/urban setting. Rural women are most likely to die of haemorrhage than urban women in Kyrgyzstan. Postpartum haemorrhage constitutes 45 per cent of all maternal deaths in Kyrgyzstan. This work concentrates on the obligations of Kyrgyzstan under articles 12 and 14.b of the Convention on Elimination of all Forms of Discrimination against Women (CEDAW). The work analyses the nature and scope of state obligations under respective articles. Kyrgyzstan has obligations to respect, protect and fulfill rural women’s human rights to address discriminations against rural women, provide appropriate health services and ensure availability and accessibility of misoprostol to rural women. Misoprostol is more suitable to the conditions of rural area than traditionally used oxytocin. Therefore, the availability and accessibility of rural women to misoprostol will prevent avoidable maternal deaths in haemorrhage.
6

Promotion of the Availability and Accessibility of Misoprostol under the CEDAW: Postpartum Haemorrhage among the Rural Women of the Kyrgyz Republic

Naamatova, Gulnaz 15 December 2011 (has links)
Maternal mortality in Kyrgyzstan is a discrimination of women not only based on sex, but also on rural/urban setting. Rural women are most likely to die of haemorrhage than urban women in Kyrgyzstan. Postpartum haemorrhage constitutes 45 per cent of all maternal deaths in Kyrgyzstan. This work concentrates on the obligations of Kyrgyzstan under articles 12 and 14.b of the Convention on Elimination of all Forms of Discrimination against Women (CEDAW). The work analyses the nature and scope of state obligations under respective articles. Kyrgyzstan has obligations to respect, protect and fulfill rural women’s human rights to address discriminations against rural women, provide appropriate health services and ensure availability and accessibility of misoprostol to rural women. Misoprostol is more suitable to the conditions of rural area than traditionally used oxytocin. Therefore, the availability and accessibility of rural women to misoprostol will prevent avoidable maternal deaths in haemorrhage.
7

Rôle et évolution du fibrinogène chez la femme enceinte : analyses en sang total par thrombo-élastométrie et implications pour les hémorragies de la délivrance / Role and course of fibrinogen during pregnancy : whole blood analyses by thromboelastometry and relation to postpartum haemorrhages

Huissoud, Cyril 12 December 2011 (has links)
Le rôle du fibrinogène dans les coagulopathies par hémorragie a fait récemment l'objet de travaux importants, la plupart hors du champ obstétrical. L'adaptation de la coagulation et du fibrinogène au cours de la grossesse est méconnue même si sa mise en jeu paraît indispensable à l'hémostase utérine lors de la délivrance. Nous avons donc étudié les modifications gestationnelles du fibrinogène et analysé leurs impacts sur la coagulation et l'hémorragie de la délivrance (HDD). Nous avons montré que le fibrinogène augmentait progressivement pendant la grossesse pour atteindre [3,5-6,5 g/L] (5ème-95ème p.) au 3ème trimestre. L'étude en thromboélastométrie (TEM) a révélé une élévation progressive du "potentiel coagulant" et de la fermeté du caillot chez la femme enceinte. Nous avons ensuite analysé le lien entre le taux initial de fibrinogène lors d'une HDD et le risque d'aggravation (Etude PITHAGORE 6). Le taux de fibrinogène était le meilleur marqueur du risque d'évolution grave. Des seuils de fibrinogène inférieurs à 2 et 3 g/L étaient associés à un risque accru d'aggravation par rapport aux femmes avec un taux > 3 g/L (respectivement OR=11,99 ; IC95% [2,56-56,06] et OR=1.90; IC95% [1,16-3,09]. Enfin l'étude en TEM a montré que les paramètres précoces CA5- et CA15-FIBTEM étaient étroitement corrélés aux taux de fibrinogène lors des HDD permettant l'optimisation du monitorage de la coagulation. Nos résultats nous conduisent à proposer deux scores de coagulopathie obstétricale prenant en compte les spécificités de la grossesse. Des essais seront nécessaires pour valider la pertinence de ces scores et pour évaluer le bénéfice de la compensation précoce en fibrinogène dans les HDD / The role of fibrinogen in haemorrhage-induced coagulopathies has recently been the subject of important work, most of it outside the field of obstetrics. The changes in coagulation and fibrinogen during pregnancy are poorly understood, even though its involvement is essential for uterine haemostasis during the afterbirth. We thus studied the course of fibrinogen levels during pregnancy and analysed their effects on coagulation and postpartum (third-stage) haemorrhage (PPH). We showed that fibrinogen increases progressively during pregnancy, reaching [3.5-6.5 g/L] (5th-95th p.) during the 3rd trimester. The thromboelastometry (TEM) study revealed a progressive increase in the coagulant potential and firmness of clots in pregnant women. We then analysed the association between the initial fibrinogen level during PPH and the risk of aggravation (in the PITHAGORE 6 study). A woman's fibrinogen level was the best marker of the risk that her condition would worsen. Thresholds below 2 and 3 g/L were associated with higher risks of aggravation than in women with fibrinogen concentrations >3g/L (respectively OR=11.99 ; 95% CI [2.56-56.06] and OR=1.90; 95% CI [1.16-3.09]. Finally the TEM study showed that FIBTEM assessment of the early indicators, clot amplitude at 5 and 15 minutes (CA5 and CA15), was closely correlated with fibrinogen levels during PPH and thus helped to optimise coagulation monitoring. Our results lead us to suggest two obstetric coagulopathy scores that take the specificities of pregnancy into account. Trials will be necessary to validate their relevance and to assess the benefits of early fibrinogen replacement in PPH

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