published_or_final_version / Nursing Studies / Master / Master of Nursing in Advanced Practice

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by Siu Pik-ngan. / Questionnarie in Chinese. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references (leaves 74-79). / List of Tables --- p.v / List of Figures --- p.vi / List of Appendices --- p.vii / Introduction --- p.1 / Method --- p.28 / Results --- p.36 / Discussion --- p.55 / References --- p.74 / Appendices --- p.80

published_or_final_version / Social Work / Master / Master of Social Work

Intracavitary high dose rate (HDR) brachytherapy is a form of radiation therapy generally in which a post-surgical tissue margin is treated. The dose gradient of HDR brachytherapy is very steep, and thus small displacements of the applicator, even as small as 1 mm, could potentially cause significant variations of dose which could result in undesired side effects such as overdose of a critical organ. In this retrospective dosimetric study, the variation of dose due to various small range motions of gynecological applicators is investigated. The results show that the implementation of additional immobilization and localization devices along with other safety measures needs to be further investigated. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2015 / FAU Electronic Theses and Dissertations Collection

This qualitative study explored and described the experience of African women diagnosed with both HIV/AIDS and cervical cancer in order to gain an understanding of the experience of both illnesses as lived by these women. Phenomenological research methods were employed using in-depth semi-structured interviews. Communication as a strategy facilitating diagnosis, disclosure, acceptance and support for women with HIV/AIDS and cervical cancer emerged as the main theme, followed by the experience of physical symptoms and emotional experiences. The study shows the importance of communication in the management and support of these women attending public health institutions and in the community. For communication to occur the relationship between healthcare professionals and women diagnosed with HIV/AIDS and cervical cancer is very important. Treatment approaches in radiation therapy need to be developed for women diagnosed with HIV/AIDS and cervical. More research is needed in this area (HIV/AIDS and cervical cancer). / Health Studies / M.A. (Public Health)

This qualitative study explored and described the experience of African women diagnosed with both HIV/AIDS and cervical cancer in order to gain an understanding of the experience of both illnesses as lived by these women. Phenomenological research methods were employed using in-depth semi-structured interviews. Communication as a strategy facilitating diagnosis, disclosure, acceptance and support for women with HIV/AIDS and cervical cancer emerged as the main theme, followed by the experience of physical symptoms and emotional experiences. The study shows the importance of communication in the management and support of these women attending public health institutions and in the community. For communication to occur the relationship between healthcare professionals and women diagnosed with HIV/AIDS and cervical cancer is very important. Treatment approaches in radiation therapy need to be developed for women diagnosed with HIV/AIDS and cervical. More research is needed in this area (HIV/AIDS and cervical cancer). / Health Studies / M.A. (Public Health)

Background Cervical cancer is one of the common cancers worldwide. Despite the available screening services, the uptake of cancer of the cervix is very low. The incidence and mortality in western countries has reduced greatly due to the introduction of cervical cancer screening programmes. However, this is not the same in Africa where cervical cancer is more prevalent in lower resource countries to lack of access to effective screening and services that enhances early detection and treatment. Purpose/Aim of the study The purpose of this research is to determine knowledge of cervical cancer and the level of awareness of screening regimes/routines among HIV positive women in Swaziland. The study was conducted at one hospital specifically at the HIV Care Unit and Public Health Unit between January and June 2015. Methods The questionnaire was administered to collect data and consisted both open and close-ended questions. The questionnaire comprises of three sections: Section A: Socio-demographic data and Section B: Awareness on Cervical Cancer. Section C: Awareness/knowledge on cervical cancer screening. The sample consisted of 123 HIV positive who are on antiretroviral therapy (ART) or ART naive. The mean age for the respondents was 35 years. Results From this study, N=28 (23%) out of 123 (77%) reported to have received annual Pap smear for cervical cancer screening. A low proportion of the respondents (45%) had knowledge on cervical cancer screening. In addition, 63% of those who got information about cervical cancer screening through the radio perceived themselves to be at risk of getting cervical cancer. Only 4% heard about cervical cancer at the ART clinic, despite having been followed up for their care at the HIV clinic. Those who screened for cervical cancer were younger in age 25-34 years (80%). This study also revealed that education increased the changes of a woman to be screened for cervical cancer. If a woman had a university or high school education, she perceived herself to be at risk of getting cervical cancer. Conclusion Knowledge is power, cervical cancer campaigns should be conducted at national level in order to promote prevention through screening. Cervical cancer screening should be fully integrated into HIV services / Health Studies / M.A. (Public Health)

Text in English / The purpose of the study was to explore perceptions, knowledge and attitudes of women undergoing cervical cancer screening in Omaheke, Namibia. A qualitative exploratory study was conducted. Data were collected from a purposive sample of eight participants using a self-developed interview guide. Data were analysed using Tesch’s descriptive method of open coding. Three themes were identified namely; cervical cancer as a disease, perception of cervical cancer and service delivery at the facility. The findings also revealed some suggestions for the facility that could improve screening uptake. The study proposes a community education programme on cervical cancer and related topics to be covered during health education sessions. In addition the study recommends the Omaheke directorate to look into operational issues in order to facilitate access to cervical cancer screening. / Health Studies / M.P.H.

Les infections génitales par les virus du papillome humains (HPV) sont les infections virales sexuellement transmises, les plus communes chez les femmes en âge de procréer. Il est désormais bien établi que l’infection persistante par les HPV classés «à haut risque» est l’un des facteurs indispensables au développement de lésions précancéreuses et cancéreuses du col de l’utérus. Ces HPV semblent aussi être impliqués dans le développement d’autres cancers de la région ano-génitale et pourraient être également impliqués dans les cancers de la tête et du cou. Durant cette dernière décennie, des études croissantes tendent à établir un rôle étiologique des HPV dans les dysfonctionnements gestationnels. La détection des ADN HPV dans les placentas issus d’avortements spontanés et leur capacité exceptionnelle à se répliquer in vitro dans les cellules trophoblastiques cultivées en monocouche, ont apporté de nouvelles perspectives quant à la possibilité que le placenta pourrait constituer aussi un tropisme naturel des infections par HPV.<p>Six jours après la fécondation et suite à l’accolement du blastocyste à l’épithélium utérin, le trophoblaste s’engage dans des processus actifs de prolifération, d’invasion et de différenciation complexe pour la construction de l’interface physiologique indispensable aux échanges essentiels entre la mère et l’enfant ;le placenta. De façon intéressante, ses propriétés sont similaires à celles de la cellule tumorale maligne. Néanmoins, ses mécanismes sont étroitement régulés dans le trophoblaste, à la fois dans l’espace et le temps, assurant un développement normal à chaque étape de la grossesse.<p>Devant toutes ces données, nous avions émis l’hypothèse que l’expression des protéines précoces E5, E6 et E7 d’HPV de type 16 (de haut risque), pourraient modifier le développement des trophoblastes infectés. Les résultats obtenus durant ce travail de doctorat démontrent que la protéine virale E5, hautement hydrophobe, est cytotoxique et affecte la viabilité du trophoblaste. Cette cytotoxicité est neutralisée, et la viabilité est améliorée, lorsque les oncoprotéines majeures E6 et E7 sont exprimées en présence de la protéine E5. Lorsque toutes les protéines précoces sont exprimées sous le contrôle de leur propre promoteur (LCR), la viabilité est favorisée. Ces observations ont été confirmées dans les cellules cervicales également. Il a été précédemment rapporté que les oncoprotéines E6 et E7 affectaient l’adhésion du trophoblaste aux cellules endométriales. Dans le présent travail, il a été retrouvé que la protéine E5 diminuait elle aussi l’adhésion, non seulement aux cellules endométriales, mais aussi au support de culture cellulaire. Les capacités de migration et d’invasion de la matrice extracellulaire sont augmentées par l’expression de E5 et dans une plus large proportion par l’expression de E6 et E7. Des résultats similaires ont été obtenus lorsque toutes les protéines de la région précoces sont exprimées sous le contrôle de leur propre promoteur (LCR). La diminution de l’expression de la E-cadhérine est considérée comme un marqueur de malignité et de mauvais pronostic pour les cancers. Nous avons démontré que l’expression de E5, E6 ou de E7, inhibait l’expression de la E-cadhérine, reflétant l’impact des oncoprotéines du virus HPV-16 sur la diminution de l’adhésion et l’augmentation du pouvoir invasif des cellules trophoblastiques. L’investigation d’autres marqueurs de malignité et de tolérance immunitaire, l’étude de l’impact du virus HPV-6 (de bas risque) sur la migration et l’invasion des cellules trophoblastiques, et l’étude de la capacité des protéines précoces d’HPV-16 à influencer l’entrée des particules virales, ont fait l’objet de résultats préliminaires, ouvrant de larges perspectives.<p><p><p>Genital Human Papillomavirus (HPV) infections are the most common sexually transmitted infections amongst women on the age of reproduction. It is well established that persistent infection with high-risk HPVs is the necessary factor in the causation of precancerous and cancerous cervical lesions. High-risk HPVs have also been reported to be involved in the causation of head and neck cancers and other anogenital cancers. On this last decade, growing data are attempting to study the potential etiological association of HPV with gestational dysfunctions. The detection of HPV DNA in placentas resulting from spontaneous abortions and the unique ability of multiple HPV types to replicate in vitro in trophoblastic cells cultured in a monolayer system, rise new questions over the HPV tropism. <p>Six days following fertilization and once the apposition of the blastocyst on the uterine wall takes place, the trophoblast, in a very active and complex process, starts to proliferate, invade and to differentiate in order to build a physiological interface; the placenta, from where multiple mother/foetus exchanges occur. Interestingly, the way that the trophoblast behaves is very similar to malignant tumoural cells. However, the trophoblast obeys to strict spatial-temporal regulatory confines, insuring a proper development all along the pregnancy.<p>In regard to these data, we hypothesised that the expression of the high-risk HPV type 16 oncoproteins E5, E6 and E7, might modify the development of the infected trophoblast. During my Ph.D study, I demonstrated that the highly hydrophobic protein E5 is localized in many interne membranes compartments of the transfected trophoblast. E5 affects the viability of transiently and stably transfected trophoblastic cells. E6 and E7, favouring cell growth, neutralised the E5 cytotoxic effect. All HPV-16 early proteins, when expressed under the control of their endogenous promoter (LCR), favoured trophoblastic growth. These observations were also observed in cervical cell lines. In addition, E5 decreased the adhesiveness of trophoblastic cells to the tissue culture plastic and to endometrial cells similarly as previously described for E6 and E7. Cells expressing E6, E7 and in less extend E5 favoured chemotaxic migration and matrigel invasion compared to the cells expressing the LacZ control. These effects were also observed when early proteins were expressed under the control of their own viral promoter (LCR). Interestingly, the E-cadherin was down regulated in trophoblastic cells expressing E5, E6 and E7. In conclusion, HPV-16 early proteins enhanced trophoblastic growth and intensify the malignant phenotype by impairing cell adhesion leading to increased cellular motile and invasive properties. HPV-16 E5 participated, with E6 and E7, in these changes by impairing E-cadherin expression, a hallmark of malignant progression. Additional preliminary results consisting on the investigation of other markers of malignancy and immune tolerance, on studying the impact of the low-risk HPV type 6 early proteins on the migratory and invasive properties of trophoblastic cells and on the study of the ability of HPV-16 to influence the entry of virus particules, allowed to open wide perspectives.<p><p><p> / Doctorat en Sciences / info:eu-repo/semantics/nonPublished