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1.
Pharm Res ; 38(9): 1563-1583, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34495486

RESUMO

PURPOSE: To evaluate a modified high purity polysorbate 20 (RO HP PS20)-with lower levels of stearate, palmitate and myristate esters than the non-modified HP PS20-as a surfactant in biopharmaceutical drug products (DP). RO HP PS20 was designed to provide functional equivalence as a surfactant while delaying the onset of free fatty acid (FFA) particle formation upon hydrolytic degradation relative to HP PS20. METHODS: Analytical characterization of RO HP PS20 raw material included fatty acid ester (FAE) distribution, higher order ester (HOE) fraction, FFA levels and trace metals. Functional assessments included 1) vial and intravenous bag agitation; 2) oxidation via a placebo and methionine surrogate study; and 3) hydrolytic PS20 degradation studies to evaluate FFA particle formation with and without metal nucleation. RESULTS: Interfacial protection and oxidation propensity were comparable between the two polysorbates. Upon hydrolytic degradation, FFA particle onset was delayed in RO HP PS20. The delay was more pronounced when HOEs of PS20 were preferentially degraded. Furthermore, the hydrolytic degradants of RO HP PS20 formed fewer particles in the presence of spiked aluminum. CONCLUSION: This work highlights the criticality of having tighter control on long chain FAE levels of PS20 to reduce the occurrence of FFA particle formation upon hydrolytic degradation and lower the variability in its onset. By simultaneously meeting compendial PS20 specifications while narrowing the allowable range for each FAE and shifting its composition towards the shorter carbon chain species, RO HP PS20 provides a promising alternative to HP PS20 for biopharmaceutical DPs.


Assuntos
Ácidos Graxos não Esterificados/química , Polissorbatos/química , Produtos Biológicos/química , Química Farmacêutica/métodos , Ésteres/química , Hidrólise , Oxirredução , Tensoativos/química
2.
Qual Health Res ; 29(8): 1199-1212, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-30764720

RESUMO

Studies in sub-Saharan Africa show that masculine identities contribute to men's relatively lower uptake of HIV services. Although useful, these studies pay less attention to men's agency to negotiate and refashion masculine identities which better suit their lives as men living with HIV. In this article, I analyze the refashioning of masculine identities among men living with HIV in Uganda, adjustment processes which helped their self-management, and adherence to treatment. In-depth interviews with 18 men are thematically analyzed. Physical recovery was the embodiment of recovered masculinity and underpinned the men's ability to refashion alternative, hybrid masculinities. Men negotiated and refashioned two forms of dominant masculinity already identified in this context, respectability and reputation, notably being a responsible father again and supporting other men with HIV, and being strong, resilient and an HIV survivor. Understanding men's refashioning of masculinities can inform service providers' approaches to reach more men with HIV treatment.


Assuntos
Antirretrovirais/uso terapêutico , Infecções por HIV/tratamento farmacológico , Infecções por HIV/psicologia , Masculinidade , Autogestão/psicologia , Adaptação Psicológica , Adulto , Idoso , Antirretrovirais/administração & dosagem , Comportamentos Relacionados com a Saúde , Humanos , Masculino , Saúde do Homem , Pessoa de Meia-Idade , Aceitação pelo Paciente de Cuidados de Saúde , Pesquisa Qualitativa , Estigma Social , Uganda
3.
J Cancer Educ ; 33(3): 551-556, 2018 06.
Artigo em Inglês | MEDLINE | ID: mdl-27526692

RESUMO

The purpose of this study is to determine the effectiveness of multimedia educational tools to improve CT planning preparation for intensity modulated radiotherapy (IMRT) for prostate cancer. Many patients are not prepared when given verbal preparation instructions to have a full bladder and empty rectum for their IMRT and require being rescanned, which results in additional costs for the patient and the hospital. A pamphlet and video outlining the proper preparation for prostate IMRT was created to decrease additional scans and the associated costs, while increasing patient satisfaction. A controlled, randomized experimental group study was conducted to examine the effectiveness of the multimedia tools (the video and the pamphlet), as compared to the pamphlet only, in preparing patients for their planning CT appointment. We found no statistical difference between the multimedia group and the pamphlet group in patients' preparedness for their appointments and the rescanning rate. However, patients in the multimedia group indicated that they felt more prepared about their treatment after watching the video and stated that they would recommend the video to other patients with prostate cancer. Furthermore, patients who had to wait longer for their planning CT appointment felt less prepared by the materials than those with a shorter wait time. We recommend reducing wait times between appointments as much as possible to increase patients' preparedness for the planning CT. We conclude that providing multimedia treatment information and minimizing wait times increases patients' feelings of preparedness leading to a more positive treatment experience and reducing costly rescans. TRIAL REGISTRATION: ClinicalTrials.gov NCT02410291.


Assuntos
Multimídia , Educação de Pacientes como Assunto/métodos , Neoplasias da Próstata/radioterapia , Radioterapia de Intensidade Modulada/métodos , Idoso , Idoso de 80 Anos ou mais , Humanos , Masculino , Pessoa de Meia-Idade , Folhetos , Satisfação do Paciente , Gravação de Videoteipe
4.
Sociol Health Illn ; 38(1): 58-72, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26382288

RESUMO

Antiretroviral therapy (ART) has the potential to change processes of HIV stigmatisation. In this article, changing processes of stigmatisation among a group of people living with HIV (PLWH) on ART in Wakiso District, Uganda, are analysed using qualitative data from a study of PLWH's self-management of HIV on ART. There were 38 respondents (20 women, 18 men) who had been taking ART for at least 1 year. They were purposefully selected from government and non-government ART providers. Two in-depth interviews were held with each participant. Processes of reduced self-stigmatisation were clearly evident, caused by the recovery of their physical appearance and support from health workers. However most participants continued to conceal their status because they anticipated stigma; for example, they feared gossip, rejection and their status being used against them. Anticipated stigma was gendered: women expressed greater fear of enacted forms of stigma such as rejection by their partner; in contrast men's fears focused on gossip, loss of dignity and self-stigmatisation. The evidence indicates that ART has not reduced underlying structural drivers of stigmatisation, notably gender identities and inequalities, and that interventions are still required to mitigate and tackle stigmatisation, such as counselling, peer-led education and support groups that can help PLWH reconstruct alternative and more positive identities. A video abstract of this article can be found at: https://youtu.be/WtIaZJQ3Y_8.


Assuntos
Antirretrovirais/uso terapêutico , Infecções por HIV/tratamento farmacológico , Estigma Social , Estereotipagem , Adolescente , Adulto , Doença Crônica , Feminino , Infecções por HIV/psicologia , Humanos , Entrevistas como Assunto , Masculino , Pessoa de Meia-Idade , Pesquisa Qualitativa , Autocuidado/psicologia , Uganda , Adulto Jovem
5.
Qual Health Res ; 26(11): 1447-58, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26246523

RESUMO

In this article, we examine how people living with HIV (PLWH) were able to reconceptualize or "reframe" their understanding of HIV and enhance their capacity to self-manage the condition. Two in-depth interviews were held with 38 PLWH (20 women, 18 men) selected from three government and nongovernment antiretroviral therapy (ART) delivery sites in Wakiso District, and the narratives analyzed. ART providers played an important role in shaping participants' HIV self-management processes. Health workers helped PLWH realize that they could control their condition, provided useful concepts and language for emotional coping, and gave advice about practical self-management tasks, although this could not always be put into practice. ART providers in this setting were spaces for the development of a collective identity and a particular form of therapeutic citizenship that encouraged self-management, including adherence to ART. Positive framing institutions are important for many PLWH in resource-limited settings and the success of ART programs.


Assuntos
Antivirais/uso terapêutico , Infecções por HIV/tratamento farmacológico , Autocuidado , Adaptação Psicológica , Adulto , Feminino , Humanos , Masculino , Modalidades de Fisioterapia , Uganda
6.
Med Educ ; 48(7): 674-86, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24909529

RESUMO

CONTEXT: Medical schools have tended to admit students with strong backgrounds in the biomedical sciences. Previous studies have shown that those with backgrounds in the social sciences can be as successful in medical school as those with science backgrounds. However, the experience of being a 'non-science' student over time has not been well described. METHODS: A mixed-methods study was developed and run with the aim of elucidating the personal experiences of science and non-science students at our institution. Data were generated from a student survey that focused on participants' self-identification as science or non-science students, and on their sense of preparedness and stress, and from a series of student focus groups exploring participants' experiences of science and non-science issues in all aspects of their training. Descriptive statistics were generated for structured survey data. Focus group data and unstructured survey data were analysed to identify common themes. End-of-module and end-of-year examination data for the four class cohorts in the programme were also analysed to compare science and non-science student performance over time. RESULTS: There were clear differences between the experiences and performance of science and non-science students. We found dichotomies in students' self-reported sense of preparedness and stress levels, and marked differences in their examination performance, which diminished over time to converge around the third year of their studies. Combining science and non-science students in the same class affected the students to different extents and in different ways. The potential disruption of mixing science and non-science students diminished as their levels of performance converged. CONCLUSIONS: The psychosocial stress experienced by non-science students and the challenges it posed, in both their academic and their personal lives, have implications for how such students should be supported, and how curricula can be configured to afford quality learning for all medical students.


Assuntos
Atitude do Pessoal de Saúde , Disciplinas das Ciências Biológicas , Educação de Graduação em Medicina , Estudantes de Medicina/psicologia , Comportamento Cooperativo , Currículo , Coleta de Dados , Escolaridade , Humanos , Pesquisa Qualitativa , Critérios de Admissão Escolar , Autoimagem , Estresse Psicológico/psicologia , Fatores de Tempo
7.
Sex Reprod Health Matters ; 31(1): 2134629, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36811853

RESUMO

Infertility is a reproductive health concern that deserves attention, as reconfirmed by the 2018 report of the Guttmacher-Lancet Commission on Sexual and Reproductive Health and Rights (SRHR). However, governments and SRHR organisations tend to neglect infertility. We conducted a scoping review of existing interventions aiming to decrease the stigmatisation of infertility in low- and middle-income countries (LMICs). The review consisted of a combination of research methods: academic database (Embase, Socological abstracts, google scholar; resulting in 15 articles), Google and social media searches, and primary data collection (18 key informant interviews and 3 focus group discussions). The results distinguish between infertility stigma interventions targeted at intrapersonal, interpersonal and structural levels of stigma. The review shows that published studies on interventions tackling infertility stigmatisation in LMICs are rare. Nevertheless, we found several interventions at intra- and interpersonal levels aiming to support women and men to cope with and mitigate infertility stigmatisation (e.g. counselling, telephone hotlines, and support groups). A limited number of interventions addressed stigmatisation at a structural level (e.g. empowering infertile women to become financially independent). The review suggests that infertility destigmatisation interventions need to be implemented across all levels. Interventions geared to individuals experiencing infertility should include women and men and also be offered beyond the clinical setting; and interventions should also aim to combat stigmatising attitudes of family or community members. At the structural level, interventions could aim to empower women, reshape masculinities and improve access to and quality of comprehensive fertility care. Interventions should be undertaken by policymakers, professionals, activists, and others working on infertility in LMICs, and accompanied with evaluation research to assess their effectiveness.


Assuntos
Países em Desenvolvimento , Infertilidade Feminina , Masculino , Humanos , Feminino , Estereotipagem , Estigma Social , Aconselhamento
8.
J Med Imaging Radiat Sci ; 54(4): 611-619, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37718151

RESUMO

BACKGROUND: Time is a valuable commodity that impacts hospital flow, patient experience and economic resources. This study aims to identify factors that affect daily treatment time over a course of radiation therapy (RT) in patients who underwent adjuvant breast RT. METHODS: In all adjuvant breast/chestwall RT patients treated from October 2017 to May 2018, daily set-up, beam delivery time, and overall treatment times were collected. A multivariable linear regression analysis was conducted to identify significant predictive factors related to treatment time. A general linear regression model was used to determine whether there was a learning curve effect throughout the course of treatment that decreased treatment time as patient and staff familiarity with the treatment procedure increased. RESULTS: A total of 567 patients were included with a median age of 61 years. The average overall treatment time for 2-field and 4-field RT was 8.3 (SD 2.4) and 13.1 (SD 5.6) minutes, respectively. Factors that significantly increased overall treatment times in patients prescribed 2-field RT were: bilateral techniques, breath-hold (BH) techniques, prone techniques (PR), reverse decubitus techniques (RD), wide tangents techniques, the use of bolus and number of segments delivered. (p < 0.05). Factors that significantly increased overall treatment times in patients who received 3-field and 4-field RT were: wide tangents volumes, a higher number of monitor units (MUs), bilateral techniques and BH techniques (p < 0.05). Older patients (≥60) who underwent 3-field and 4-field RT demonstrated a statistically significant increase in set-up time (p < 0.0001). Overall treatment time decreased from 10.0 to 9.3 min over the course of treatment, suggesting a minor learning curve (p = 0.009). CONCLUSION: The use of bilateral RT, BH, PR, RD, wide tangents, bolus, increasing treatment volumes, and increasing plan complexity were associated with increased treatment times. Future research should quantify the impact of other factors (BMI, mobility, patient care assessments, and imaging protocols) and utility of technological tools (time-predicting models, machine learning tools, and operations research models) on treatment time to optimize RT scheduling and improve resource management.


Assuntos
Neoplasias , Humanos , Pessoa de Meia-Idade , Ontário , Radioterapia Adjuvante , Suspensão da Respiração , Fatores de Tempo
9.
Asian J Nanosci Mater ; 4(3): 229-239, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38192303

RESUMO

Iron nanoparticles (MNPs) are known to induce membrane damage and apoptosis of cancer cells. In our study we determined whether FDG coupled with iron oxide magnetic nanoparticles can exert the same destructive effect on cancer cells. This research study presents data involving NIC-H727 human lung, bronchus epithelial cells exposed to conjugated fluorodeoxyglucose conjugated with iron-oxide magnetic nanoparticles and indocyanine green (ICG) dye (FDG-MNP-ICG), with and without the application of a magnetic field. Cell viability inferred from MTT assay revealed that FDG-MNPs had no significant toxicity towards noncancerous NIC-H727 human lung, bronchus epithelial cells. However, percentage cell death was much higher using a magnetic field, for the concentration of FDG-MNP-ICC used in our experiments. Magnetic field was able to destroy cells containing MNPs, while MNPs alone had significantly lower effects. Additionally, MNPs alone in these low concentrations had less adverse effects on healthy (non-target) cells.

10.
Asian J Nanosci Mater ; 4(1): 53-66, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38234577

RESUMO

We present a report regarding the cytotoxic effects of iron-based magnetic nanoparticles conjugated with fluorodeoxyglucose (FDG-mNPs) on the viability of NCI-H727 and SH-SY5Y cancer cells. MTT assays were performed to determine cell viability in treated cancer cells grown under standard 2D culture conditions. FDG-mNP concentrations of 0.075 mg/mL, 0.15 mg/mL, and 0.3 mg/mL decreased mean cell viability of NCI-H727 cells to 92.5%, 82.9%, and 75% respectively. FDG-mNPs was also shown to have a detrimental effect on the viability of SY5Y cells: a decrease of 5.7%, 18.6%, and 36.4% was found for SY5Y cells treated with 0.075 mg/mL, 0.15 mg/mL, and 0.3 mg/mL concentrations of FDG-mNPs, respectively. When NCI-H727 and SH-SY5Y cancer cells were grown as 3D spheroids, morphology was visibly changed and the number of viable cells was decerased in spheroids treated with FDG-mNPs compared with untreated spheroids. The results of our study demonstrated that FDG-mNP has toxic effects on NCI-H7272 and SY5Y cancer cells, and we conclude that conjugated FDG-mNPs are promising in the development of clinical applications for the destruction of cancer cells.

11.
CJC Open ; 3(12): 1438-1443, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34993455

RESUMO

BACKGROUND: Radiation therapy (RT) is a standard cancer treatment modality, and an increasing number of patients with cardiac implantable electronic devices (CIEDs) are being referred for RT. The goals of this study were as follows: (i) to determine the incidence of CIED malfunction following RT; (ii) to characterize the various types of malfunctions that occur; and (iii) to identify risk factors associated with CIED malfunction following RT. METHODS: A retrospective study of patients with CIEDs who received RT between 2007 and 2018 at 4 Canadian centres (Sunnybrook Health Sciences Centre, Kingston General Hospital, Hamilton Health Sciences Centre, and University of Ottawa Heart Institute) was conducted. Patients underwent CIED interrogation after completion of RT, to assess for late damage to the CIEDs. Data on demographics, devices, and RT were compared for the primary outcome of device malfunction. RESULTS: Of 1041 patients with CIEDs who received RT, 811 patients with complete data were included. Device malfunctions occurred in 32 of 811 patients (4%). The most common device malfunctions were reduced ventricular/atrial sensing (in 13 of 32 [41%]), an increase in lead threshold (in 9 of 32 [22%]), lead noise (in 5 of 32 [16%]), and electrical reset (in 2 of 32 [6%]). Higher beam energy (≥ 10 MV) was associated with malfunction (P < 0.0001). Radiation dose was not significantly different between the malfunction and non-malfunction groups (58.3 cGy vs 65 cGy, respectively, P = 0.71). CONCLUSIONS: Although RT-induced CIED malfunctions are rare (occurring in 4% of patients with a CIED who undergo RT), collaborative efforts between radiation oncologists and cardiac rhythm device clinics to optimize CIED monitoring are needed, to detect and manage CIED malfunctions. Malfunctions are more common in patients receiving higher-beam energy ( ≥ 10 MV ) RT.


CONTEXTE: La radiothérapie (RT) est une modalité standard de traitement du cancer, et un nombre croissant de patients porteurs de dispositifs cardiaques électroniques implantables (DCEI) doivent recevoir un traitement de RT. Les objectifs de cette étude étaient les suivants : (i) déterminer l'incidence d'une défaillance du DCEI après une RT; (ii) caractériser les différents types de défaillances qui se produisent; (iii) déterminer les facteurs de risque associés à la défaillance du DCEI après une RT. MÉTHODOLOGIE: Une étude rétrospective des patients avec un DCEI ayant reçu une RT entre 2007 et 2018 dans quatre centres canadiens (Sunnybrook Health Sciences Centre, Kingston General Hospital, Hamilton Health Sciences Centre et Institut de cardiologie de l'Université d'Ottawa) a été menée. Le DCEI des patients a été interrogé après la fin de la RT, pour en évaluer les dommages tardifs. Les données sur les caractéristiques démographiques, les dispositifs et la RT ont été comparées pour le paramètre d'évaluation principal, soit la défaillance du dispositif. RÉSULTATS: Sur les 1 041 patients avec un DCEI ayant reçu une RT, 811 patients avec des données complètes ont été inclus. Des défaillances du dispositif sont survenues chez 32 des 811 patients (4 %). Les défaillances les plus fréquentes du dispositif étaient une détection ventriculaire/atriale réduite (chez 13 des 32 patients [41 %]), une augmentation du seuil de la sonde (chez 9 des 32 patients [22 %]), un bruit provenant de la sonde (chez 5 des 32 patients [16 %]) et une réinitialisation électrique (chez 2 des 32 patients [6 %]). Une énergie de faisceau plus élevée (≥ 10 MV) était associée à une défaillance (p < 0,0001). La dose de rayonnement ne présentait pas de différence significative entre le groupe où une défaillance a été constatée et l'autre groupe (58,3 cGy vs 65 cGy, respectivement, p = 0,71). CONCLUSIONS: Bien que les défaillances du DCEI causées par la RT soient rares (survenant chez 4 % des patients avec un DCEI qui subissent une RT), une collaboration est nécessaire entre les radio-oncologues et les cliniques de dispositifs de gestion du rythme cardiaque, afin d'optimiser la surveillance du DCEI et de détecter et de gérer ces défaillances. Les défaillances sont plus fréquentes chez les patients recevant une énergie de faisceau plus élevée au moment de la RT ( ≥ 10 MV ) .

12.
J Med Imaging Radiat Sci ; 51(3): 379-393, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32362536

RESUMO

INTRODUCTION: Breast cancer radiotherapy (RT) can increase the risk of cardiac disease with increasing dose; as such, reducing excessive dosage to the heart is a concern for clinicians. The purpose of the present study was to assess mean heart dose (MHD) in patients with breast cancer receiving RT, where it was hypothesized that MHD decreased over time. METHODS: Patients planned for adjuvant unilateral whole breast/chest wall RT from 2011 to 2018 were included for a retrospective chart-review at a single-institution, academic center. MHD (Gy) was summarized by laterality, fractionation, and heart-sparing techniques. RESULTS: A total of 4,687 patients were included. The median MHD for left-sided conventional RT (50 Gy in 25 fractions) was 2.16 Gy across all years, decreasing until 2015 and increasing after. Median MHD for left-sided hypofractionated RT (42.6 Gy in 16 fractions) was 1.47 Gy, also decreasing until 2015 and increasing after. The increase in MHD after 2015 was attributed to a significant increase in the use of wide tangents (including internal mammary chain) after 2015 (P < .0001). Several treatment factors were associated with higher MHD in both right- and left-sided cancers, including locoregional RT, high tangents, wide tangents, bolus, heart shielding, treatment to the chest wall, higher volume of tissue irradiated by tangential fields, higher baseline breast separation values, and smaller heart volume. After adjusting for laterality and fractionation in the multivariate analysis, locoregional RT, wide tangents, heart shielding, boost, treatment to the chest wall, higher volume of tissue irradiated by tangential fields, higher baseline breast separation, and lower heart volume were significantly associated with higher MHD (P < .0001). DISCUSSION/CONCLUSIONS: MHD should be considered when determining the most appropriate RT techniques for both right- and left-sided cancers as higher MHD was significantly associated with various treatment techniques and patient factors.


Assuntos
Fracionamento da Dose de Radiação , Coração/efeitos da radiação , Órgãos em Risco , Neoplasias Unilaterais da Mama/radioterapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Cardiopatias/prevenção & controle , Humanos , Pessoa de Meia-Idade , Hipofracionamento da Dose de Radiação , Lesões por Radiação/prevenção & controle , Proteção Radiológica , Radioterapia Adjuvante , Estudos Retrospectivos , Adulto Jovem
13.
Blood Cancer J ; 10(2): 20, 2020 02 25.
Artigo em Inglês | MEDLINE | ID: mdl-32098948

RESUMO

In patients with immunoglobulin light-chain (AL) amyloidosis, depth of hematologic response correlates with both organ response and overall survival. Our group has demonstrated that screening with a matrix-assisted laser desorption/ionization-time-of-flight (TOF) mass spectrometry (MS) is a quick, sensitive, and accurate means to diagnose and monitor the serum of patients with plasma cell disorders. Microflow liquid chromatography coupled with electrospray ionization and quadrupole TOF MS adds further sensitivity. We identified 33 patients with AL amyloidosis who achieved amyloid complete hematologic response, who also had negative bone marrow by six-color flow cytometry, and who had paired serum samples to test by MS. These samples were subjected to blood MS. Four patients (12%) were found to have residual disease by these techniques. The presence of residual disease by MS was associated with a poorer time to progression (at 50 months 75% versus 13%, p = 0.003). MS of the blood out-performed serum and urine immunofixation, the serum immunoglobulin free light chain, and six-color flow cytometry of the bone marrow in detecting residual disease. Additional studies that include urine MS and next-generation techniques to detect clonal plasma cells in the bone marrow will further elucidate the full potential of this technique.


Assuntos
Biomarcadores Tumorais/sangue , Cromatografia Líquida/métodos , Amiloidose de Cadeia Leve de Imunoglobulina/diagnóstico , Espectrometria de Massas/métodos , Neoplasia Residual/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Seguimentos , Humanos , Amiloidose de Cadeia Leve de Imunoglobulina/sangue , Masculino , Pessoa de Meia-Idade , Neoplasia Residual/sangue , Prognóstico , Estudos Retrospectivos , Taxa de Sobrevida
14.
BMC Genet ; 10: 65, 2009 Oct 09.
Artigo em Inglês | MEDLINE | ID: mdl-19818141

RESUMO

BACKGROUND: Developing a greater understanding of population genetic structure in lowland tropical plant species is highly relevant to our knowledge of increasingly fragmented forests and to the conservation of threatened species. Specific studies are particularly needed for taxa whose population dynamics are further impacted by human harvesting practices. One such case is the fishtail or xaté palm (Chamaedorea ernesti-augusti) of Central America, whose wild-collected leaves are becoming progressively more important to the global ornamental industry. We use microsatellite markers to describe the population genetics of this species in Belize and test the effects of climate change and deforestation on its recent and historical effective population size. RESULTS: We found high levels of inbreeding coupled with moderate or high allelic diversity within populations. Overall high gene flow was observed, with a north and south gradient and ongoing differentiation at smaller spatial scales. Immigration rates among populations were more difficult to discern, with minimal evidence for isolation by distance. We infer a tenfold reduction in effective population size ca. 10,000 years ago, but fail to detect changes attributable to Mayan or contemporary deforestation. CONCLUSION: Populations of C. ernesti-augusti are genetically heterogeneous demes at a local spatial scale, but are widely connected at a regional level in Belize. We suggest that the inferred patterns in population genetic structure are the result of the colonization of this species into Belize following expansion of humid forests in combination with demographic and mating patterns. Within populations, we hypothesize that low aggregated population density over large areas, short distance pollen dispersal via thrips, low adult survival, and low fruiting combined with early flowering may contribute towards local inbreeding via genetic drift. Relatively high levels of regional connectivity are likely the result of animal-mediated long-distance seed dispersal. The greatest present threat to the species is the potential onset of inbreeding depression as the result of increased human harvesting activities. Future genetic studies in understory palms should focus on both fine-scale and landscape-level genetic structure.


Assuntos
Arecaceae/genética , Evolução Molecular , Genética Populacional , Belize , DNA de Plantas/genética , Fluxo Gênico , Variação Genética , Genótipo , Geografia , Endogamia , Repetições de Microssatélites , Densidade Demográfica , Análise de Sequência de DNA , Árvores/genética
15.
Trop Med Int Health ; 14(4): 458-67, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19254274

RESUMO

OBJECTIVE: To measure the direct cost burdens (health care expenditure as a percent of total household expenditure) for households in rural South Africa, and examine the expenditure and use patterns driving those burdens, in a setting with free public primary health care and hospital exemptions for the poor. METHODS: Data on illness events, treatment patterns and health expenditure in the previous month were assessed from a cross-sectional survey of 280 households conducted in the Agincourt Health and Demographic Surveillance site, South Africa. RESULTS: On average, a household experiencing illness incurred a direct cost burden of 4.5% of total household expenditure. A visit to a public clinic generated a mean burden of 1.3%. Complex sequences of treatments led 20% of households to incur a burden over 10%, with transport costs generating 42% of this burden. An outpatient public hospital visit generated a burden of 8.2%, as only 58% of those eligible obtained an exemption; inpatient stays incurred a burden of 45%. Consultations with private providers incurred a mean burden of 9.5%. About 38% of individuals who reported illness did not take any treatment action, 55% of whom identified financial and perceived supply-side barriers as reasons. CONCLUSION: The low overall mean cost burden of 4.5% suggests that free primary care and hospital exemptions provided financial protection. However, transport costs, the difficulty of obtaining hospital exemptions, use of private providers, and complex treatment patterns meant state-provided protection had limitations. The significant non-use of care shows the need for other measures such as more outreach services and more exemptions in rural areas. The findings also imply that fee removal anywhere must be accompanied by wider measures to ensure improved access.


Assuntos
Atenção à Saúde/economia , Honorários e Preços , Gastos em Saúde , Acessibilidade aos Serviços de Saúde/economia , Aceitação pelo Paciente de Cuidados de Saúde , Atenção Primária à Saúde/economia , Serviços de Saúde Rural/economia , Estudos Transversais , Humanos , Saúde da População Rural , África do Sul
16.
J Med Imaging Radiat Sci ; 50(1): 5-11, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30777248

RESUMO

INTRODUCTION: Health care services use surveys to assess patient satisfaction and identify areas for improvement. While it is important to assess patient satisfaction to ensure their needs are met, lengthy questionnaires with closed-ended questions often focus on areas that may be considered important by institutions rather than patients. Recently, focus has shifted toward patient and caregiver experience, which institutions address via appreciative inquiry. The aim of this initiative was the development of a patient experience survey (PES) for radiation therapy patients and caregivers which would allow them to express their opinions and priorities. This patient feedback would then be addressed through quality improvement (QI) projects geared toward improving the overall patient and caregiver experience in radiation therapy. METHODS: A three-question minute survey was developed for use as a PES in the radiation therapy department of an academic oncology program located in a large metropolitan area. Feedback was obtained from patient education and person-centred care experts, as well as 10 radiation therapy patients. All feedback was incorporated to create the final PES; respondents rated their agreement on a five-point Likert scale with the statement "My overall experience in Radiation Therapy was great" and two open-ended questions allowed them to highlight departmental strengths and areas for improvement. An initial 3-month pilot was conducted where PESs were available on a self-serve basis to patients and caregivers in waiting areas and at radiation therapy treatment units. All responses were anonymous and completed surveys were returned via drop boxes. Descriptive statistics and thematic analysis were used to analyse responses. RESULTS: A total of 86 surveys were returned. Of those, 80 (93%) responded to the Likert scale question with 83% agreeing or strongly agreeing that their experience in radiation therapy was great. Several strengths were identified by respondents including teamwork, professionalism, and knowledge. Areas identified for improvement included management of appointment delays and communication of delays to patients, as well as environmental improvements. CONCLUSIONS: Although most respondents reported a favourable experience, this pilot demonstrated the minute survey can identify areas for improvement that can be addressed through QI. Including the patient perspective in QI is evidenced to enhance its outcome and aligns with institutional, provincial, and national strategic goals of improving the quality of cancer care through patient engagement.


Assuntos
Satisfação do Paciente , Melhoria de Qualidade , Radioterapia/normas , Inquéritos e Questionários , Humanos
17.
Value Health ; 11 Suppl 1: S52-60, 2008 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18387068

RESUMO

OBJECTIVES: In Thailand, policymakers have come under increasing pressure to use economic evaluation to inform health-care resource allocation decisions, especially after the introduction of the Universal Health Insurance Coverage (UC) scheme. This article presents qualitative findings from research that assessed a range of policymakers' perspectives on the acceptability of using economic evaluation for the development of health-care benefit packages in Thailand. The policy analysis examined their opinions about existing decision-making processes for including health interventions in the UC benefit package, their understanding of health economic evaluation, and their attitudes, acceptance, and values relating to the use of the method. METHODS: Semistructured interviews were conducted with 36 policy actors who play a major role or have some input into health resource allocation decisions within the Thai health-care system. These included 14 senior policymakers at the national level, 5 hospital directors, 10 health professionals, and 7 academics. RESULTS AND CONCLUSIONS: Policy actors thought that economic evaluation information was relevant for decision-making because of the increasing need for rationing and more transparent criteria for making UC coverage decisions. Nevertheless, they raised several difficulties with using economic evaluation that would pose barriers to its introduction, including distrust in the method, conflicting philosophical positions and priorities compared to that of "health maximization," organizational allegiances, existing decision-making procedures that would be hard to change, and concerns about political pressure and acceptability.


Assuntos
Atitude do Pessoal de Saúde , Tomada de Decisões Gerenciais , Política de Saúde/economia , Pesquisa sobre Serviços de Saúde/economia , Cobertura Universal do Seguro de Saúde/economia , Análise Custo-Benefício , Prioridades em Saúde , Humanos , Entrevistas como Assunto , Tailândia
18.
BMC Health Serv Res ; 8: 197, 2008 Sep 26.
Artigo em Inglês | MEDLINE | ID: mdl-18817579

RESUMO

BACKGROUND: This paper presents qualitative findings from an assessment of the acceptability of using economic evaluation among policy actors in Thailand. Using cost-utility data from two economic analyses a hypothetical case scenario was created in which policy actors had to choose between two competing interventions to include in a public health benefit package. The two competing interventions, laparoscopic cholecystectomy (LC) for gallbladder disease versus renal dialysis for chronic renal disease, were selected because they highlighted conflicting criteria influencing the allocation of healthcare resources. METHODS: Semi-structured interviews were conducted with 36 policy actors who play a major role in resource allocation decisions within the Thai healthcare system. These included 14 policy makers at the national level, five hospital directors, ten health professionals and seven academics. RESULTS: Twenty six out of 36 (72%) respondents were not convinced by the presentation of economic evaluation findings and chose not to support the inclusion of a proven cost-effective intervention (LC) in the benefit package due to ethical, institutional and political considerations. There were only six respondents, including three policy makers at national level, one hospital director, one health professional and one academic, (6/36, 17%) whose decisions were influenced by economic evaluation evidence. CONCLUSION: This paper illustrates limitations of using economic evaluation information in decision making priorities of health care, perceived by different policy actors. It demonstrates that the concept of maximising health utility fails to recognise other important societal values in making health resource allocation decisions.


Assuntos
Tomada de Decisões Gerenciais , Política de Saúde/economia , Cobertura do Seguro/economia , Modelos Econômicos , Formulação de Políticas , Colecistectomia Laparoscópica/economia , Custos e Análise de Custo , Doenças da Vesícula Biliar/cirurgia , Pesquisa sobre Serviços de Saúde , Humanos , Entrevistas como Assunto , Nefropatias/terapia , Diálise Renal/economia , Alocação de Recursos , Tailândia
19.
J Med Imaging Radiat Sci ; 49(2): 136-144, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32074031

RESUMO

BACKGROUND: Radiation oncology Care Plans are predefined procedures that outline a patient's radiation therapy (RT) path of care. Care Plans allow for standardization of centre-specific procedures and workflows, thereby laying the foundation for autoforwarding of RT tasks and mandatory information capture via assessment forms. However, the integration of Care Plans at a large centre with established workflows is challenging and requires a redesign of numerous processes across all disciplines and site groups in an electronic data management system. Here, we describe the development and implementation experience of IQ Script enabled MOSAIQ Care Plans at the Odette Cancer Centre between summer 2014 and summer 2016. METHODS: A core Care Plan development group was formed that included membership from key stakeholders in RT, oncology, and physics. Care Plan pre-development planning was performed in three phases that included (1) collection and organization of all site and technique-specific protocols and procedures, (2) creation of workflow process maps and intimate discussions with potential stakeholders regarding automation and information capture, and (3) integration of design concepts into the IQ Script enabled Care Plans authoring framework. Following pre-planning, IQ Script enabled Care Plans authoring was performed on a test server with standardized naming conventions and tracking sheets for all IQ scripting triggers and events. Care Plan workflows were tested, and a senior therapist transferred individual Care Plans to the production server. Care Plans were then released gradually over a 1-year period, starting with pilot sites with the highest site group member buy-in. A post-implementation survey was performed to assess end-user feedback. SUMMARY AND CONCLUSIONS: IQ Script enabled Care Plans resulted in standardization of clinical processes including patient booking, autoforwarding of RT tasks, and mandatory information capture. Survey results indicated stakeholder satisfaction with the implementation process. Comments for improving Care Plans included changes to computed tomography simulation assessment forms for more robust capture of dose prescription and fractionation. Overall, the transition to Care Plans allowed our center to enhance information documentation, streamline our RT workflow, and ultimately improve the accuracy and efficiency of patient care. For the radiation oncologist, the use of Care Plans has also eliminated the use of another software system in which to request planning.

20.
Pract Radiat Oncol ; 8(2): 116-122, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29329996

RESUMO

INTRODUCTION: Radiation therapy is a standard treatment option for prostate cancer. With growing use of escalated doses and tighter margins, procedures to limit rectal size variation are needed to reduce prostate motion, increase treatment accuracy, and minimize rectal toxicity. This prospective study was done to determine whether the introduction of an antiflatulent medication would decrease rectal distention at computed tomography (CT) simulation and throughout a course of radiation therapy. METHODS AND MATERIALS: Patients undergoing a radical course of radiation therapy to the prostate/prostate bed were eligible to participate. Participants were randomly assigned to the intervention arm (antiflatulent medication) or the control arm (no medication). For each participant, the number of CT simulation rescans was recorded. Rectal diameters were measured on CT simulation and treatment cone beam CT scans. Acute rectal toxicities were assessed at baseline and weekly using National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 4.0. A χ2 analysis was used to compare the number of participants requiring a rescan in each study arm. Change in rectal diameter over time was assessed using repeated measures analysis of variance. RESULTS: A total of 78 patients participated, with equal numbers assigned to each study arm. There was no significant difference between arms in the number of participants requiring a CT simulation rescan (P = .5551). There was no significant variation in rectal diameter between arms (P = .8999); however, there was a significant effect of time (P = .0017) and a significant interaction effect between study arm and time on rectal diameter (P = .0141). No acute rectal toxicities above grade 2 were reported. CONCLUSIONS: The addition of antiflatulent medication did not affect the frequency of CT simulation rescans. Both time and the interaction between study arm and time had a statistically significant effect on rectal diameter, although neither finding was clinically significant. Instead, standardized bowel preparation education developed for this study may have been sufficient to limit rectal size variation.


Assuntos
Antiespumantes/uso terapêutico , Neoplasias da Próstata/tratamento farmacológico , Neoplasias da Próstata/radioterapia , Radioterapia Guiada por Imagem/métodos , Idoso , Antiespumantes/farmacologia , Humanos , Masculino
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