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1.
Lupus ; 26(1): 38-47, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27225211

RESUMO

BACKGROUND: African American ethnicity is independently associated with lupus myocarditis compared with other ethnic groups. In the mixed racial population of the Western Cape, South Africa, no data exists on the clinical features/outcome of lupus myocarditis. OBJECTIVES: The objective of this study was to give a comprehensive description of the clinical features and outcome of acute lupus myocarditis in a mixed racial population. METHODS: Clinical records (between 2008 and 2014) of adult systemic lupus erythematosus (SLE) patients at a tertiary referral centre were retrospectively screened for a clinical and echocardiographic diagnosis of lupus myocarditis. Clinical features, laboratory results, management and outcome were described. Echocardiographic images stored in a digital archive were reanalysed including global and regional left ventricular function. A poor outcome was defined as lupus myocarditis related mortality or final left ventricular ejection fraction (LVEF) <40%. RESULTS: Twenty-eight of 457 lupus patients (6.1%) met inclusion criteria: 92.9% were female and 89.3% were of mixed racial origin. Fifty-three per cent of patients presented within three months after being diagnosed with SLE. Seventy-five per cent had severely active disease (SLE disease activity index ≥ 12) and 67.9% of patients had concomitant lupus nephritis. Laboratory results included: lymphopenia (69%) and an increased aRNP (61.5%). Treatment included corticosteroids (96%) and cyclophosphamide (75%); 14% of patients required additional immunosuppression including rituximab. Diastolic dysfunction and regional wall motion abnormalities occurred in > 90% of patients. LVEF improved from 35% to 47% (p = 0.023) and wall motion score from 1.88 to 1.5 (p = 0.017) following treatment. Overall mortality was high (12/28): five patients (17.9%) died due to lupus myocarditis (bimodal pattern). Patients who died of lupus myocarditis had a longer duration of SLE (p = 0.045) and a lower absolute lymphocyte count (p = 0.041) at diagnosis. LVEF at diagnosis was lower in patients who died of lupus myocarditis (p = 0.099) and in those with a persistent LVEF < 40% (n = 5; p = 0.046). CONCLUSIONS: This is the largest reported series on lupus myocarditis. The mixed racial population had a similar prevalence, but higher mortality compared with other ethnic groups (internationally published literature). Patients typically presented with high SLE disease activity and the majority had concomitant lupus nephritis. Lymphopenia and low LVEF at presentation were of prognostic significance, associated with lupus myocarditis related mortality or a persistent LVEF < 40%.


Assuntos
Lúpus Eritematoso Sistêmico/complicações , Miocardite/etiologia , Grupos Raciais/estatística & dados numéricos , Disfunção Ventricular Esquerda/etiologia , Doença Aguda , Adolescente , Adulto , Feminino , Humanos , Lúpus Eritematoso Sistêmico/epidemiologia , Lúpus Eritematoso Sistêmico/etnologia , Linfopenia/epidemiologia , Masculino , Miocardite/epidemiologia , Miocardite/etnologia , Prevalência , Prognóstico , Estudos Retrospectivos , África do Sul/epidemiologia , Fatores de Tempo , Disfunção Ventricular Esquerda/epidemiologia , Função Ventricular Esquerda , Adulto Jovem
2.
S Afr J Surg ; 54(3): 43, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28240470

RESUMO

Typical cases of acute appendicitis have excellent treatment outcomes, if managed appropriately.1 We discuss an unusual case of perforated retrocaecal appendicitis that presented as a right thigh abscess without prominent abdominal symptoms, which highlights the lethal nature of advanced appendicitis even when appropriate surgical therapy is instituted.

3.
Educ Health (Abingdon) ; 24(3): 641, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22267360

RESUMO

INTRODUCTION: In 2006, a Postgraduate Diploma in Eye Care (PGDEC) for mid-level health personnel was initiated in Papua New Guinea, in partnership with The Fred Hollows Foundation New Zealand, the local government and Divine Word University. In the absence of national accreditation and with limited resources, an interim evaluation was needed. METHODS: We adapted the World Federation for Medical Education (WFME) standards to use in a self-audit to evaluate nine areas and 38 subareas of programme structure, processes and implementation. We developed a rating system: each area and subarea was scored for partial or complete attainment of basic or quality development levels. Ratings were referenced with supporting documents. Data were gathered internally, through document census and meetings between stakeholders. FINDINGS: A qualitative and quantitative portrait emerged: all nine programme areas completely attained at least basic level and two completely attained the quality development level. Twenty-six (68%) subareas completely attained the quality development level. Key successes included the administration of the PGDEC, synergies between the partnership's stakeholders and its relationship with the public health system. DISCUSSION AND CONCLUSIONS: This self-audit adapted from WFME standards provided a simple, yet systematic and largely objective evaluation. It proved beneficial to further develop the programme, highlighting strengths and areas for improvement.


Assuntos
Competência Clínica , Educação Médica/normas , Auditoria Médica/métodos , Oftalmologia/educação , Atitude do Pessoal de Saúde , Comportamento Cooperativo , Educação Médica/métodos , Avaliação Educacional , Escolaridade , Oftalmopatias , Saúde Global , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Oftalmologia/normas , Ilhas do Pacífico , Pesquisa Qualitativa , Controle de Qualidade
4.
Int Nurs Rev ; 58(1): 79-88, 2011 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-21281298

RESUMO

BACKGROUND: Sufficient, appropriately trained health personnel need to be retained in the workforce, and their performance maintained, to achieve quality care. Mid-level ophthalmic personnel in Western Pacific Island Countries and Territories (WPICT) are no exception. AIM: The study aims to assess influences on the quality of care provided by specialist mid-level ophthalmic personnel in WPICT and devise strategies to train, retain and maintain performance of these personnel. METHODS: A situational assessment employed a checklist and semi-structured interviews with specialist mid-level ophthalmic personnel, nursing bodies and Ministry of Health representatives from seven WPICT. A selective literature review guided strategies to address the issues identified. RESULTS: Appropriate training allows nurses to fulfill a mid-level role in WPICT as specialist ophthalmic nurses. Resources generally do not restrict practice. Nursing structures have generally failed to support professionalism: scope and conditions of service, clinical supervision, career structures, professional recognition and opportunities for continuing professional development are rudimentary. Ophthalmic nurses were dissatisfied with the lack of specialty recognition, career progression and salary increase. Regional and local strategies tailored to each country have been devised to establish sustainable processes for support. CONCLUSION: Salary was a major cause of dissatisfaction. It should be addressed along with professional recognition and related processes. Without professional support, specialist and advanced cadres within nursing may cease to exist, nurses' performance may be affected or they may leave. Specialist ophthalmic nursing, recognized, situated within and properly supported by nursing structures can provide a model for specialist clinical care for other specialties and in other countries.


Assuntos
Oftalmologia , Qualidade da Assistência à Saúde , Especialidades de Enfermagem , Mobilidade Ocupacional , Lista de Checagem , Competência Clínica , Humanos , Entrevistas como Assunto , Oftalmologia/educação , Ilhas do Pacífico , Reorganização de Recursos Humanos , Salários e Benefícios
5.
S Afr Med J ; 111(8): 720-723, 2021 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-35227350

RESUMO

Herbal medicines made from the bark of the Cinchona tree, and later quinine, have been widely used for centuries to treat medical conditions such as tropical malaria. More recently, chloroquine (CQ) and its synthetic derivatives have been used as antimalarials and to treat systemic lupus erythematosus, rheumatoid arthritis, and in the past 14 months or so, COVID-19 pneumonia. Anecdotal evidence and the erratic covering through social media of its potential efficacy in the treatment of COVID-19 pneumonia have resulted in the widespread off-label use of CQ in South Africa and worldwide. This study aimed to show that access to CQ as a chronic medication for rheumatic and musculoskeletal diseases was limited during the COVID-19 pandemic, and that this resulted in an increased incidence of flares in these patients, affecting their morbidity and potentially leading to mortality.


Assuntos
Cloroquina/farmacologia , Reumatologia/normas , Instituições de Assistência Ambulatorial/organização & administração , Instituições de Assistência Ambulatorial/estatística & dados numéricos , Antirreumáticos/farmacologia , Antirreumáticos/uso terapêutico , Cloroquina/uso terapêutico , Humanos , Doenças Musculoesqueléticas/tratamento farmacológico , Doenças Reumáticas/tratamento farmacológico , Reumatologia/métodos , Reumatologia/estatística & dados numéricos , Tratamento Farmacológico da COVID-19
6.
Educ Health (Abingdon) ; 23(2): 368, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20853239

RESUMO

INTRODUCTION: The Western Pacific region has a dearth of appropriately educated eye care providers, training programs and large and increasing eye health needs. METHOD: To ensure regional eye health needs would be met, an iterative process sought triangulations between the literature and consultations with local stakeholders from various fields. This information was used to develop competencies to meet quality standards for educational outcomes. A framework for social accountability was used to evaluate the proposed educational initiative, and the subsequent eye care service the graduates could provide. RESULTS: Current human resource development and deployment is inadequate to protect and restore ocular and visual health in the region. Some of these service needs could be met by task-shifting from conventional health professionals to appropriately trained mid-level personnel. A competency-based curriculum was developed to meet eye care needs and define this new cadre of mid-level professionals in relation to other professionals. This initiative met the relevance, equity, cost effectiveness and quality criteria for social accountability. DISCUSSION: The consultative process resulted in broad acceptance of the need for an appropriately educated mid-level cadre that could be recruited, educated, deployed, supported and retained in the Western Pacific region to supplement and substitute for established eye care professionals. This process also provided validation of the initiative prior to implementation, as being appropriate to the region, meeting educational standards and social accountability criteria for outcomes. It could be replicated in other regions that wish to develop such an education for new cadres of health care professionals.


Assuntos
Competência Clínica , Olho , Necessidades e Demandas de Serviços de Saúde , Oftalmologia/educação , Desenvolvimento de Programas , Responsabilidade Social , Currículo , Escolaridade , Fiji , Conhecimentos, Atitudes e Prática em Saúde , Acessibilidade aos Serviços de Saúde , Nível de Saúde , Humanos , Avaliação das Necessidades , Papua Nova Guiné
7.
S Afr Med J ; 110(12): 1231-1237, 2020 Nov 27.
Artigo em Inglês | MEDLINE | ID: mdl-33403971

RESUMO

BACKGROUND: Biological disease-modifying antirheumatic drug therapies have become the gold standard of treatment for refractory rheumatic conditions in well-resourced countries. There is a significant risk of infection and reactivation of latent infections, in particular tuberculosis, with the use of biological therapies. Their safety and reasons for discontinuation in a resource-limited environment are still unclear. OBJECTIVES: The primary objective was to describe the nature and frequency of adverse events as well as the main reason for discontinuation of biological treatment. METHODS: We conducted a retrospective, descriptive folder review of all patients started on biological therapy for rheumatic conditions from November 2011 to December 2016. RESULTS: A total of 31 patients were included. The rheumatic diseases included in the study were ankylosing spondylitis (AS) (35%), rheumatoid arthritis (RA) (19%), systemic lupus erythematosus (16%), juvenile idiopathic arthritis (13%), vasculitides (10%) and psoriatic arthritis (7%). Adverse events occurred in 26 patients (84%). Serious adverse events occurred in 14 patients (45%) with recurrent uveitis being the most common, occurring in 5 patients (16%). One patient developed pulmonary tuberculosis (PTB). Discontinuation or switching of biological therapy occurred in 13 patients (42%), with the main reasons being serious adverse events in 7 patients (23%) and treatment failure in 6 (19%). The median (interquartile range (IQR)) Bath Ankylosing Spondylitis Disease Activity Index score improved from 6.4 (5 - 7.4) to 2.8 (0.9 - 5.0), a statistically significant difference of -3.5 (p=0.001) (95% confidence interval (CI) -5.3 - -1.7) over a median (IQR) of 20 (9 - 30) months in the AS group. The median (IQR) Clinical Disease Activity Index score improved from 39 (34.5 - 43) to 21 (18.7 - 25.5), a statistically significant difference of -17.4 (p=0.044) (95% CI -34.1 - -0.7) over a median (IQR) of 39 (21 - 50) months in the RA group. CONCLUSIONS: Recurrent uveitis occurred in almost half of the patients with AS and was also the main reason for discontinuation of biological therapy. We did not document an increased risk of PTB. Disease activity scores showed significant improvement. The study is limited by the small number of patients on biological therapy, a reflection of the impact of severe resource constraints.


Assuntos
Antirreumáticos/efeitos adversos , Produtos Biológicos/efeitos adversos , Doenças Reumáticas/tratamento farmacológico , Adulto , Antirreumáticos/administração & dosagem , Produtos Biológicos/administração & dosagem , Terapia Biológica/efeitos adversos , Terapia Biológica/métodos , Humanos , Estudos Retrospectivos , Doenças Reumáticas/fisiopatologia , Uveíte/induzido quimicamente , Uveíte/epidemiologia , Suspensão de Tratamento/estatística & dados numéricos
8.
S Afr J Surg ; 51(2): 44-5, 2013 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-23725890
9.
S Afr Med J ; 108(3): 210-216, 2018 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-30004365

RESUMO

BACKGROUND: At present, much of the global surgical workforce consists of non-specialist physicians (general practitioners (GPs)) whose only formal surgical training was in medical school as an undergraduate. However, there is widespread concern that GPs do not have the skills necessary to deliver essential surgical care in a rural setting. This requires that a specific training programme be developed to train rural GPs in essential surgical skills for rural settings. OBJECTIVES: To perform a critical analysis to determine essential surgical skills required by GPs in rural South Africa, with the intention of developing the content of an accredited continuing professional development (CPD) learning programme to address needs identified. METHODS: This was a descriptive study in which a desk-top review analysis and a questionnaire survey were used to obtain both qualitative and quantitative data on essential skills required for rural surgical practice. RESULTS: Of 300 GPs, 102 (34.0%) completed the questionnaire. Some of the skills listed as essential for rural surgical practice were removal of foreign objects not in the visual axis (90.0%), packing of epistaxis (93.0%), haematoma drainage (78.3%) and wound debridement and suturing (96.0%). The study also identified the outcomes and essential content of a proposed CPD programme to provide GPs in the rural setting with the required surgical skills. CONCLUSIONS: Enhancing skills of GPs in essential surgical techniques and procedures through an accredited CPD short learning programme will ensure that adequate and comprehensive essential surgical care is provided to people living in rural communities.

10.
Br J Ophthalmol ; 91(7): 860-6, 2007 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-17576709

RESUMO

AIM: To investigate the aspects of spectacle correction of vision-impairing refractive error and presbyopia in those aged >or=40 years in Timor-Leste. METHOD: A population-based cross-sectional survey with cluster random sampling was used to select 50 clusters of 30 people. Those who had uncorrected or undercorrected refractive error (presenting acuity worse than 6/18, but at least 6/18 with pinhole), uncorrected or undercorrected presbyopia (near vision worse than N8), and/or who were using or had used spectacles were identified. Dispensing history, willingness to wear and willingness to pay for spectacles were elicited. RESULTS: Of 1470 people enumerated, 1414 were examined (96.2%). The "met refractive error need" in the sample was 2.2%, and the "unmet refractive error need" was 11.7%. The "refractive error correction coverage" was 15.7%. The "met presbyopic need" was 11.5%, and the "unmet presbyopic need" was 32.3%. The "presbyopia correction coverage" was 26.2%. Lower correction coverage was associated with rural domicile, illiteracy and farming. Of the sample, 96.0% were willing to wear spectacles correcting impaired vision. Of these, 17.0% were willing to pay US$3 ( pound 1.52, euro 2.24) for spectacles, whereas 50.2% were unwilling to pay US$1 ( pound 0.51, euro 0.75). Women and rural dwellers were less likely to be willing to pay at least US$1 for spectacles. CONCLUSION: Refractive error and presbyopia correction coverage rates are low in Timor-Leste. There is a large need for spectacles, especially for elderly and illiterate people, farmers and rural dwellers: those least able to pay for them. An equitable cross-subsidisation spectacle system should be possible.


Assuntos
Óculos/estatística & dados numéricos , Erros de Refração/terapia , Adulto , Fatores Etários , Idoso , Custos e Análise de Custo/estatística & dados numéricos , Estudos Transversais , Países em Desenvolvimento , Óculos/economia , Feminino , Necessidades e Demandas de Serviços de Saúde , Humanos , Masculino , Pessoa de Meia-Idade , Cooperação do Paciente/estatística & dados numéricos , Presbiopia/epidemiologia , Presbiopia/terapia , Erros de Refração/epidemiologia , Timor-Leste/epidemiologia , Recusa do Paciente ao Tratamento
12.
Cancer Res ; 50(16): 4911-4, 1990 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-2199031

RESUMO

The molecular mechanisms underlying the induction of esophageal and gastric cancer are not yet understood. It is possible that different etiological factors from geographically distinct areas play a role in the onset of these cancers. Twenty-seven primary esophageal and 11 gastric cancers originating from the high-incidence areas of South Africa were analyzed for the presence of ras protooncogene mutations. We found no evidence for mutations in codons 12, 13, or 61 or the H-ras, K-ras, and N-ras genes in these primary cancers. Our results indicate that etiological factors such as fungal contamination of basic foodstuffs in a high-incidence area for these cancers do not play a role in the activation of ras genes and that mutations in these genes are not directly involved in the development of primary esophageal and gastric cancers in the South African population.


Assuntos
Códon/genética , Neoplasias Esofágicas/epidemiologia , Genes ras , Mutação , RNA Mensageiro/genética , Neoplasias Gástricas/epidemiologia , Sequência de Bases , Carcinoma de Células Escamosas/epidemiologia , Carcinoma de Células Escamosas/genética , DNA Polimerase Dirigida por DNA , Neoplasias Esofágicas/genética , Humanos , Incidência , Dados de Sequência Molecular , Hibridização de Ácido Nucleico , Sondas de Oligonucleotídeos , Reação em Cadeia da Polimerase , África do Sul , Neoplasias Gástricas/genética , Taq Polimerase
13.
Curationis ; 29(2): 77-86, 2006 May.
Artigo em Inglês | MEDLINE | ID: mdl-16910137

RESUMO

Due to feedback from students, student abuse during fieldwork, was brought to the attention of the researchers. The study aimed to determine whether a need for a non-abusive intervention programme (NIP) existed amongst the School of Health Care Science students at the University of Pretoria. All students enrolled at the School of Health Care Sciences completed a questionnaire. An overwhelming response indicated that the majority of students (95.85%) have a need for a non-abusive intervention programme (NIP). A significant need was identified especially among Nursing-, Physiotherapy- and Radiography students, 2nd and 4th year students, and within a psychiatric fieldwork setting. Two surprise findings were firstly, that students who have no history of abuse have a greater need for an intervention programme than students with a history of abuse. Secondly superiors in the field are responsible for the majority of abusive incidences reported by students. The implementation of a non-abusive intervention programme (NIP) to help students handle abusive incidences effectively and humanely is strongly recommended.


Assuntos
Pessoal Técnico de Saúde/educação , Educação em Enfermagem , Avaliação das Necessidades , Violência/prevenção & controle , Feminino , Humanos , Masculino , África do Sul
15.
S Afr J Surg ; 43(3): 88, 2005 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16180394

RESUMO

OBJECTIVES: Patients with AIDS who present with an acute abdomen pose a new challenge to surgeons. The purpose of this study was to determine the nature and outcome of intra-abdominal catastrophes in AIDS patients. METHODS: A prospective clinical study was conducted on HIV-positive patients who presented with an acute abdomen. RESULTS: Thirteen patients were included. Average age was 36 years. Seven patients presented with advanced AIDS. In 10 the ileo-caecal region was affected by a chronic inflammatory process resulting in ulceration and necrosis. Intestinal tuberculosis was found in 7 patients. Despite optimal treatment more than half the study group died in hospital. CONCLUSION: The 'acute AIDS abdomen' proved to be different in nature and prognosis than has been described previously. Intestinal tuberculosis can reasonably be suspected. Operative mortality is unacceptably high. Other treatment options are being investigated.


Assuntos
Síndrome da Imunodeficiência Adquirida/complicações , Abdome Agudo , Adulto , Feminino , Humanos , Masculino , Tuberculose Gastrointestinal/complicações
16.
S Afr Med J ; 105(3): 209-14, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26294829

RESUMO

BACKGROUND: Cyclophosphamide (CPM) is still considered to be the first-line treatment for many life-threatening autoimmune conditions. It does, however, carry a significant risk of serious adverse events, especially infections. At present CPM is administered as either a daily oral dose (DOC) or an intravenous pulse (PIVC). There is uncertainty regarding the safety profiles of both regimens in settings with a high burden of infectious diseases. OBJECTIVE: To compare the frequency and nature of adverse events related to the use of DOC and PIVC in such a setting. METHODS: A cohort of patients treated with CPM for autoimmune diseases at Tygerberg Academic Hospital, Cape Town, South Africa, from 1 January 2008 to 31 May 2013 was studied. We compared participants receiving DOC and PIVC with regard to disease characteristics and the occurrence of major adverse events. RESULTS: A total of 134 participants (92 DOC and 42 PIVC) were included. Participants in the DOC group were treated for longer (174 v. 101 days; p<0.01) and with higher cumulative doses (17 276 v. 3 327 mg; p<0.01). Risk of infection was similar in the two groups, although there were 6 deaths from leucopenic sepsis in the DOC group (v. 0; p=0.18). Nadir leucocyte counts were also lower in the DOC group (median 3.8 v. 5.3 × 109/L; p=0.02). CONCLUSION: Infection rates in the two groups were similar, but DOC was associated with longer treatment duration, greater cumulative CPM doses and more severe leucopenia. If resources allow and available literature provides support for efficacy, consideration should be given to greater use of PIVC.

17.
S Afr Med J ; 105(12): 1049-52, 2015 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-26792164

RESUMO

BACKGROUND: Integrated positron emission tomography/computed tomography (PET-CT) is a well-validated modality for assessing pulmonary mass lesions and specifically for estimating risk of malignancy. Tuberculosis (TB) is known to cause false-positive PET-CT findings. OBJECTIVE: To investigate the utility of PET-CT in the evaluation of pulmonary mass lesions and nodules in a high TB prevalence setting. METHODS: All patients referred for the evaluation of a solitary pulmonary nodule or mass and who underwent PET-CT scanning over a 3-year period were included. The PET-CT findings, including maximum standardised uptake value (SUVmax), were compared with the gold standard (tissue or microbiological diagnosis). The sensitivity, specificity, positive and negative predictive values and diagnostic accuracy for malignant disease were calculated according to the SUVmax cut-off of 2.5 and a proposed cut-off obtained from a receiver operating characteristic (ROC) curve. RESULTS: Forty-nine patients (mean (standard deviation) age 60.1 (10.2) years; 29 males) were included, of whom 30 had malignancy. Using an SUVmax cut-off of 2.5, PET-CT had a sensitivity, specificity, positive and negative predictive value and diagnostic accuracy for malignancy of 93.3%, 36.8%, 70.0%, 77.8% and 71.4%, respectively. After a ROC curve analysis, a suggested SUVmax cut-off of 5.0 improved the specificity to 78.9% and the diagnostic accuracy to 86.7%, with a small reduction in sensitivity to 90.0%. CONCLUSIONS: The diagnostic accuracy of PET-CT in the evaluation of pulmonary mass lesions using the conventional SUVmax cut-off of 2.5 was reduced in a TB-endemic area. An SUVmax cut-off of 5.0 has a higher specificity and diagnostic accuracy for malignancy, with a comparable sensitivity.

18.
Invest Ophthalmol Vis Sci ; 40(13): 3116-21, 1999 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-10586932

RESUMO

PURPOSE: To compare central corneal swelling and light scatter after 8 hours of sleep in eyes wearing high- and low-Dk hydrogel lenses and to the contralateral control eyes. METHODS: Twenty neophyte subjects wore a Lotrafilcon A (Dk, 140; Ciba Vision, Duluth GA) silicone hydrogel lens and an Etafilcon A (Dk, 18; Acuvue; Vistakon, Jacksonville, FL) 58% water content hydrogel lens of similar center thickness in random order in the right eye only, for overnight 8-hour periods. The contralateral nonwearing left eyes served as controls. Central corneal thickness was measured using an optical pachometer and light scatter using a Van den Berg stray-light meter before lens insertion, after lens removal on waking, and every 20 minutes for the next 3 hours. RESULTS: Central corneal swelling induced by the Etafilcon A lens on eye opening was significantly higher than with the Lotrafilcon A lens (8.66%+/-2.84% versus 2.71%+/-1.91%; P<0.00001). Light scatter induced by the Etafilcon A lens on eye opening was significantly higher than with the Lotrafilcon A lens (46.09+/-5.62 versus 42.78+/-6.07 Van den Berg units, P = 0.0078). The swelling of the control eyes paired with the Etafilcon A lens-wearing eyes was also slightly but significantly higher than that of the control eyes paired with the Lotrafilcon A lens-wearing eyes (2.34%+/-1.26% versus 1.44%+/-0.91%; P = 0.0002). Light-scatter measurements were not significantly different between control sets of eyes but showed the same trend. CONCLUSIONS: In neophyte subjects, corneal swelling of the contralateral control eyes appears to be influenced by the swelling of the fellow lens-wearing eyes-that is, the swelling of the contralateral control eye was significantly lower when there was less swelling of the fellow eye wearing the high-Dk lens. Although there was no statistically significant difference in light-scatter measurements between the control sets of eyes, a trend similar to the corneal swelling results was observed, which could be used to support the suggestion that this may be a sympathetic physiological response rather than an unusual sampling coincidence.


Assuntos
Lentes de Contato Hidrofílicas/efeitos adversos , Córnea/patologia , Edema da Córnea/etiologia , Adulto , Edema da Córnea/patologia , Método Duplo-Cego , Feminino , Humanos , Hidrogel de Polietilenoglicol-Dimetacrilato , Luz , Masculino , Espalhamento de Radiação
19.
Ann N Y Acad Sci ; 330: 35-52, 1979.
Artigo em Inglês | MEDLINE | ID: mdl-294187

RESUMO

X-rays of all while and mixed-race men employed in crocidolite and amosite mines and mills were read independently by three experienced readers according to the ILO U/C classification. Abnormality was regarded as present if reported by two or more readers. Parenchymal abnormality, defined as the presence of small irregular opacities of profusion 1/0 or greater, was found in 7.3% of the workers. Pleural thickening was found in 4.5% of the workers, costophrenic angle obliteration in 3.2%, and pleural calcification in 1.7%. The prevalences of both pleural and parenchymal abnormality were strongly related to the duration of exposure to asbestos at work. The overall prevalence of abnormality increase from 4.0% in men with exposure for 1 year or less to 47.9% in men with more than 15 years of exposure. After taking into account the effects of age and duration of asbestos exposure, the prevalence of pleural abnormality was not predicted by fiber concentration. However, white men working with amosite tended to develop a higher prevalence of pleural abnormality than did those working with crocidolite. Compared to whites, men of mixed race, who only work with crocidolite, had a high prevalence of pleural abnormality in each exposure duration category. In contrast to pleural abnormality, the prevalence of parenchymal abnormality, after taking into account the effects of age and duration of exposure, was significantly predicted by fiber concentration but not by race or asbestos type. Our results suggest that parenchymal abnormality in workers in South African asbestos mines could be largely prevented by reducing exposure to fibers visible under the light microscope. However, this may not be the case for pleural abnormality.


Assuntos
Amianto/efeitos adversos , Asbestose/epidemiologia , Mineração , Adulto , Métodos Epidemiológicos , Humanos , Masculino , Doenças Pleurais/epidemiologia , Risco , África do Sul , Fatores de Tempo
20.
Eur J Surg Oncol ; 17(3): 251-7, 1991 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-1646127

RESUMO

One-hundred-and-seventy-one patients with invasive lobular carcinomas have been matched with 342 patients with non-lobular invasive carcinomas for lymph node stage, tumour differentiation and patient age on a one to two basis. The two groups were investigated for differences in prognostic factors, survival, disease-free interval, metastatic patterns, receptor status, response to endocrine therapy after distant metastases and bilateral cancer rates. Patients with lobular carcinomas survived significantly longer than patients with carcinomas of no specific type, particularly in survival from the time of diagnosis of distant metastases; lobular carcinomas more often responded to endocrine treatment for systemic disease. Lobular cancers had a significantly higher rate of local recurrence, particularly after treatment by excision and breast irradiation. No differences were found between the two groups with respect to regional or distant recurrence rates, distant organ involvement patterns, distant metastatic free intervals and receptor status. Bilateral cancer was more frequent in patients with lobular carcinoma.


Assuntos
Neoplasias da Mama/patologia , Carcinoma Intraductal não Infiltrante/patologia , Carcinoma/patologia , Recidiva Local de Neoplasia , Receptores de Estrogênio/análise , Neoplasias da Mama/mortalidade , Carcinoma/mortalidade , Carcinoma Intraductal não Infiltrante/mortalidade , Distribuição de Qui-Quadrado , Feminino , Humanos , Tábuas de Vida , Pessoa de Meia-Idade , Invasividade Neoplásica , Metástase Neoplásica , Prognóstico , Taxa de Sobrevida , Reino Unido/epidemiologia
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