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2.
Eur J Dent Educ ; 21 Suppl 1: 11-13, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29205780

RESUMO

This position paper outlines the areas of competence and learning outcomes of "The Graduating European Dentist" that specifically relate to Professionalism. Professionalism is a commitment to a set of values, behaviours and relationships, which underpin the trust that the public hold in dental care professionals. Shortcomings within this domain are often responsible for patient dissatisfaction, concern and complaint-and emphasis is placed on the importance of embedding these values from an early stage within the curriculum.


Assuntos
Educação em Odontologia/normas , Profissionalismo/normas , Educação Baseada em Competências , Currículo , Educação em Odontologia/organização & administração , Europa (Continente) , Humanos
3.
Eur J Dent Educ ; 21 Suppl 1: 28-35, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29205776

RESUMO

It is often the case that good teachers just "intuitively" know how to teach. Whilst that may be true, there is now a greater need to understand the various processes that underpin both the ways in which a curriculum is delivered, and the way in which the students engage with learning; curricula need to be designed to meet the changing needs of our new graduates, providing new, and robust learning opportunities, and be communicated effectively to both staff and students. The aim of this document is to draw together robust and contemporaneous methods of teaching, learning and assessment that help to overcome some of the more traditional barriers within dental undergraduate programmes. The methods have been chosen to map specifically to The Graduating European Dentist, and should be considered in parallel with the benchmarking process that educators and institutions employ locally.


Assuntos
Educação em Odontologia/normas , Avaliação Educacional , Aprendizagem , Ensino , Competência Clínica , Educação Baseada em Competências , Currículo , Educação em Odontologia/organização & administração , Europa (Continente) , Retroalimentação , Humanos , Modelos Educacionais
4.
Ir J Psychol Med ; : 1-7, 2024 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-38818869

RESUMO

BACKGROUND: To examine if the COVID-19 pandemic was associated with a differential effect longitudinally in relation to its psychological and functional impact on patients with bipolar disorder and Emotionally Unstable Personality Disorder (EUPD). METHODS: Semi-structured interviews were conducted with 29 individuals attending the Galway-Roscommon Mental Health Services with an ICD-10 diagnosis of either bipolar disorder (n = 18) or EUPD (n = 11). The impact of the COVID-19 pandemic was assessed in relation to anxiety and mood symptoms, social and occupational functioning, and quality of life utilising psychometric instruments and Likert scale data, with qualitative data assessing participants' subjective experiences. RESULTS: Individuals with EUPD exhibited significant anxiety and depressive symptoms and increased hopelessness compared to individuals with bipolar disorder. Repeated measures data demonstrated no significant change in symptomatology for either the EUPD or bipolar disorder group over time, but demonstrated an improvement in social (t = 4.40, p < 0.001) and occupational functioning (t = 3.65, p = 0.03), and in quality of life (t = 4.03, p < 0.001) for both participant groups. Themes attained from qualitative data included the positive impact of the discontinuation of COVID-19 mandated restrictions (n = 19), and difficulties experienced secondary to reductions in the provision of mental health services during the COVID-19 pandemic (n = 17). CONCLUSION: Individuals with EUPD demonstrated increased symptomatology over a two-year period compared to those with bipolar disorder. The importance of face-to-face mental health supports for this cohort are indicated, particularly if future pandemics impact the delivery of mental health services.

5.
Phys Rev Lett ; 111(14): 140501, 2013 Oct 04.
Artigo em Inglês | MEDLINE | ID: mdl-24138229

RESUMO

Many schemes for implementing quantum information processing require that the atomic states used have a nonzero magnetic moment; however, such magnetically sensitive states of an atom are vulnerable to decoherence due to fluctuating magnetic fields. Dressing an atom with external fields is a powerful method of reducing such decoherence [N. Timoney et al., Nature (London) 476, 185 (2011)]. We introduce an experimentally simpler method of manipulating such a dressed-state qubit, which allows the implementation of general rotations of the qubit, and demonstrate this method using a trapped ytterbium ion.

6.
Int J Law Psychiatry ; 83: 101810, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35696760

RESUMO

Studies seeking predictors of outcomes after involuntary admission, including quality of life (QoL), are limited and results inconsistent. We aimed to describe QoL 3 months after involuntary psychiatric admission and to investigate associated factors. One hundred and fifty-three involuntarily admitted inpatients were assessed for a range of sociodemographic and clinical variables. Structured scales included the Brief Psychiatric Rating Scale (BPRS), the MacArthur Admission Experience Survey, the Heinrichs Quality of Life Scale and the World Health Organisation Quality of Life Brief Assessment (WHOQOL-BREF, n = 124). The mean total score on the Heinrichs QoL scale at 3 months was 69.3 (SD = 24.1). Predictors of higher 3 month QoL after involuntary admission in a multiple regression model (adjusted R2 = 0.37, F = 7.1 (14, 138), p ≤0.001) were less severe negative symptoms on the BPRS at baseline (B = -4.56, p < 0.001), improvement in negative symptom scores between baseline and follow up (B = 4.58, p < 0.001) and higher current social class (B = -14.31, p = 0.001). Events during involuntary admission, such as being subject to coercive experiences, were not significantly associated with QoL after admission. The results suggest that a core determinant of service users' QoL after involuntary admission is negative symptom severity and change over time.


Assuntos
Coerção , Qualidade de Vida , Hospitalização , Humanos , Pacientes Internados/psicologia , Inquéritos e Questionários
7.
Obstet Med ; 15(4): 267-269, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36523881

RESUMO

Multi-disciplinary collaborative care for pregnant women with complex and emergent conditions is essential. Logistical planning, clear communication and human factor awareness are all non-clinical skills which need to be utilised in order to maximise outcomes. We describe the case of a proximal aortic dissection in the late third trimester of pregnancy diagnosed in a peripheral hospital that was transferred to a cardiothoracic centre for successful operative management 160 km away. This required the time-sensitive mobilisation and liaison of a receiving cardiothoracic, anaesthesiology and perfusionist team in conjunction with obstetric and midwifery support from an affiliated maternity hospital, as well as the national neonatal transport team. We emphasise the importance of multidisciplinary team management in complex cases and how imperative good inter-disciplinary communication is to ensure safe inter-hospital transfer.

8.
Eur J Dent Educ ; 15(3): 133-41, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21762317

RESUMO

This paper presents an updated statement on behalf of the Association for Dental Education in Europe (ADEE) in relation to proposals for undergraduate Curriculum Structure, Content, Learning, Assessment and Student / Staff Exchange for dental education in Europe. A task force was constituted to consider these issues and the two previous, related publications produced by the Association (Plasschaert et al 2006 and 2007) were revised. The broad European dental community was circulated and contributed to the revisions. The paper was approved at the General Assembly of ADEE, held in Amsterdam in August 2010 and will be updated again in 2015.


Assuntos
Educação em Odontologia/normas , Educação Baseada em Competências , Currículo , Educação em Odontologia/métodos , Educação em Odontologia/organização & administração , Educação a Distância , Avaliação Educacional , Europa (Continente) , União Europeia , Humanos , Intercâmbio Educacional Internacional , Aprendizagem , Modelos Educacionais , Papel Profissional , Avaliação de Programas e Projetos de Saúde , Estudantes de Odontologia , Ensino/métodos
9.
Ir J Psychol Med ; 38(1): 40-48, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-32204737

RESUMO

OBJECTIVES: To examine the rate of monitoring of metabolic syndrome and actual rates of metabolic syndrome in two patient cohorts [clozapine treatment and long-acting injectable (LAI) antipsychotic] who are reviewed on an equally regular basis (1-4 weekly) for administration of treatment. METHODS: Clinical and laboratory data are examined on 119 patients treated with clozapine and 116 patients treated with LAI antipsychotic medications to determine the rates of metabolic syndrome and evidence of monitoring for metabolic syndrome in the previous 6 months. Individuals with insufficient data from these cohorts were invited to attend for metabolic screening to determine actual rates of metabolic syndrome in these two cohorts of patients. RESULTS: All metabolic parameters were monitored to a significantly greater extent in the clozapine cohort (>90%), compared to those treated with LAI antipsychotic medications (<50%) (blood pressure, weight, lipid and glucose levels; p < 0.001). Metabolic syndrome was present in 38.9% of those treated with clozapine compared to 31.1% of patients treated with LAI antipsychotic medications (X2 = 0.54, p = 0.46). CONCLUSIONS: These findings suggest that a robust screening plan should be in place to monitor for metabolic syndrome in individuals treated with LAI antipsychotic medications. This screening should include measurement of body weight, waist circumference, fasting glucose, lipids and fasting insulin levels. Early recognition of abnormal metabolic parameters allows early intervention, therefore, improving long-term cardiovascular outcomes.


Assuntos
Antipsicóticos , Clozapina , Síndrome Metabólica , Esquizofrenia , Antipsicóticos/efeitos adversos , Clozapina/efeitos adversos , Estudos Transversais , Preparações de Ação Retardada/uso terapêutico , Humanos , Síndrome Metabólica/induzido quimicamente , Síndrome Metabólica/diagnóstico , Síndrome Metabólica/epidemiologia , Esquizofrenia/tratamento farmacológico
10.
J Nutr Health Aging ; 24(10): 1116-1119, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33244570

RESUMO

D-dimer is routinely measured to exclude the diagnosis of venous thromboembolism and is its main biomarker. Appropriate age-adjusted D-dimer testing improves D-dimer specificity, could decrease inappropriate CT pulmonary angiograms in the older person, and prevent unnecessary radiation exposure. A "COVID-19 blood battery", designed to increase the efficiency of evaluation of COVID-19 suspected patients is used in our institution. It includes D-dimers which are elevated in COVID-19 infections and potentially an index of severe infection. These 3 very frail patients presented late to the emergency department, all acutely and non-specifically unwell, with high prevalence of comorbidities and were transferred in by ambulance. They were triaged to the COVID-19 pathway of our hospital, and subsequently had negative COVID-19 swabs. All had an incidental finding of markedly elevated D-dimers, with potential causes of their symptoms other than pulmonary embolus. They were transferred to an acute geriatric ward specifically designated to manage older patients (>75years) who had negative nasopharyngeal swab results. They were all ultimately diagnosed with extensive pulmonary emboli with evidence of raised pulmonary pressures on CTPA and/or echocardiogram. It is possible that these patients had false negative COVID-19 swabs. Allowing for the novel nature of COVID-19, prospective evaluation for new symptoms and complications such as thromboembolic disease in those affected by milder symptoms should be considered. In the absence of clinical improvement following treatment of other conditions in frail older patients, D-dimer testing could be indicated with pursuit of specific diagnostic evaluation for venous thromboembolism when significantly elevated.


Assuntos
COVID-19/sangue , COVID-19/complicações , Idoso Fragilizado , Embolia Pulmonar/diagnóstico , Tromboembolia Venosa/diagnóstico , Idoso , Idoso de 80 Anos ou mais , Biomarcadores/sangue , Serviço Hospitalar de Emergência , Feminino , Produtos de Degradação da Fibrina e do Fibrinogênio/análise , Humanos , Pulmão/patologia , Pandemias , Prevalência , Estudos Prospectivos , Embolia Pulmonar/sangue , Embolia Pulmonar/complicações , Embolia Pulmonar/epidemiologia , SARS-CoV-2 , Sensibilidade e Especificidade , Tromboembolia Venosa/sangue , Tromboembolia Venosa/complicações , Tromboembolia Venosa/epidemiologia
11.
Urol Int ; 83(2): 155-9, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-19752609

RESUMO

OBJECTIVE: To prospectively evaluate the diagnostic yield of 12 versus 15 core ultrasound-guided needle prostate biopsy protocol for detection of prostate cancer. PATIENTS AND METHODS: 244 patients were prospectively randomized to undergo 12 (group A), or 15 (group B) biopsies. The cancer detection rate was compared between these groups and within group B. RESULTS: There were no differences in the age, PSA, prostate volume or Gleason score of diagnosed cancers between groups. 113 (46%) of all patients were found to have carcinoma. The number of cancers diagnosed in each group was: 63 (51.6%) in group A, and 50 (41.0%) in group B. In both groups, performing 12 biopsies increased the number of cancer cases identified by around 10% compared to 6. The frequency of cancer cases increased when 15 biopsies were performed, but not significantly (1.7%). The probability of finding a cancer after 12 biopsies was the same as after 15 biopsies (p = 0.125, McNemar's test). CONCLUSIONS: There was no advantage in increasing the number of biopsy cores from 12 to 15 for the diagnosis of prostate cancer in men with an elevated PSA but normal digital rectal examination.


Assuntos
Biópsia por Agulha/métodos , Próstata/patologia , Neoplasias da Próstata/patologia , Idoso , Biópsia por Agulha/estatística & dados numéricos , Protocolos Clínicos , Humanos , Masculino , Estudos Prospectivos
12.
Community Dent Health ; 26(1): 32-7, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19385438

RESUMO

OBJECTIVE: The aim was to record dental caries levels and the presence of fissure sealants in 12-year-old schoolchildren whose domestic water supply had been fluoridated since birth in Dublin (Ireland). RESEARCH DESIGN: Cross-sectional study. Participants A representative, random sample of 12-year-old schoolchildren in north-west Dublin. OUTCOME MEASURES: Dental caries levels were recorded using WHO criteria and fissure sealant was recorded when sealant was detectable on a permanent molar tooth. Medical card ownership, as a surrogate for disadvantage, was recorded by use of a questionnaire. RESULTS: Three-hundred and thirty-two (332) children were examined. The mean DMFT was 0.80 (SD 1.24). Analysis (Mann-Whitney U test) based on stratification of the sample according to medical-card status revealed no statistically significant difference between DMFT median scores of children of medical-card holders (i.e., social disadvantage background) and non medical-card holders (p-value = 0.23). However, the data revealed a social gradient in the presence of at least one fissure sealant. Approximately 10% more children in the group of medical-card holders had no fissure sealants present. Fisher's exact test was used to examine the association between the absence of fissure sealants and at least one fissure sealant between the two groups and was considered to be statistically significant (p-value = 0.04). CONCLUSION: This study demonstrated a social gradient in the presence of fissure sealants, but no such gradient in dental caries levels. This demonstrates the importance of population-based measures in the prevention of dental caries, such as water fluoridation, in reducing oral health inequalities.


Assuntos
Assistência Odontológica para Crianças/estatística & dados numéricos , Cárie Dentária/epidemiologia , Selantes de Fossas e Fissuras/economia , Adolescente , Criança , Estudos Transversais , Assistência Odontológica para Crianças/economia , Cárie Dentária/economia , Cárie Dentária/prevenção & controle , Inquéritos de Saúde Bucal , Dentição Permanente , Humanos , Irlanda/epidemiologia , Dente Molar , Pobreza , Prevalência , Fatores Socioeconômicos
13.
J Nutr Health Aging ; 20(6): 671-6, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27273359

RESUMO

Moving visual fields can have strong destabilising effects on balance, particularly when visually perceived motion does not correspond to postural movements. This study investigated relationships between visual field dependence (VFD), as assessed using the roll vection test, and reported dizziness, falls and sway under eyes open, eyes closed and optokinetic conditions. Ninety five falls clinic attendees undertook the roll vection test (i.e. attempted to align a rod to the vertical while exposed to a rotating visual field). Sway was assessed under different visual conditions by centre of pressure movement. Participants also completed questionnaires on space and motion discomfort, fear of falling, depression and anxiety. Thirty four (35.8%) participants exhibited VFD, i.e. had an error > 6.5º in the roll vection test. Compared to participants without VFD, participants with VFD demonstrated less movement of the centre of pressure across all visual conditions, were more likely to report space and motion discomfort and to have suffered more multiple falls in the past year. VFD was independent of fear of falling, anxiety and depression. VFD in a falls clinic population is associated with reduced sway possibly due to a stiffening strategy to maintain stance, dizziness symptoms and an increased risk of falls.


Assuntos
Acidentes por Quedas/estatística & dados numéricos , Tontura/etiologia , Transtornos da Visão/complicações , Campos Visuais/fisiologia , Idoso de 80 Anos ou mais , Assistência Ambulatorial , Feminino , Humanos , Masculino , Movimento , Equilíbrio Postural
14.
J Perinatol ; 36(4): 300-5, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26658124

RESUMO

OBJECTIVE: To estimate the incidence and identify risk factors for surgical site infections (SSIs) among infants in the neonatal intensive care unit (NICU). STUDY DESIGN: A prospective cohort study of infants undergoing surgical procedures from May 2009 to April 2012 in three NICUs was performed. SSI was identified if documented by an attending neonatologist and treated with intravenous antibiotics. Independent risk factors were identified using logistic regression, adjusting for NICU. RESULT: A total of 902 infants underwent 1346 procedures and experienced 60 SSIs (incidence: 4.46/100 surgeries). Risk factors for SSIs included younger chronological age (odds ratio (OR) 1.03 per day decrease, 95% confidence interval (CI) 1.01, 1.04), lower gestational age (OR 1.09 per week decrease, CI 1.02, 1.18), male sex (OR 1.17, CI 1.04, 1.34) and use of central venous catheter (OR 4.40, CI 1.19, 9.62). Only 43% had surgical site cultures obtained and Staphylococcus aureus was most commonly isolated. CONCLUSION: SSIs complicated 4.46% of procedures performed in the NICU. Although few modifiable risk factors for SSIs were identified, future efforts should focus on evaluating the impact of current prevention strategies on the incidence of neonatal SSI.


Assuntos
Unidades de Terapia Intensiva Neonatal , Infecções Estafilocócicas/epidemiologia , Infecção da Ferida Cirúrgica/epidemiologia , Antibacterianos/uso terapêutico , Cefazolina/uso terapêutico , Feminino , Humanos , Incidência , Recém-Nascido , Tempo de Internação , Estudos Longitudinais , Masculino , Estudos Prospectivos , Fatores de Risco , Infecções Estafilocócicas/tratamento farmacológico , Staphylococcus aureus/isolamento & purificação , Infecção da Ferida Cirúrgica/tratamento farmacológico , Vancomicina/uso terapêutico
15.
Br Dent J ; 218(12): E17, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26067892

RESUMO

AIM: Emergency dental care is a vital service that new graduates should be prepared to offer. There are few published data relating to emergency dental care education. To assess this, and to gain a profile of accident and emergency departments (A&E) in dental schools, an online survey was sent to all of the dental schools in the Republic of Ireland and the UK. SETTING: The survey addressed the school's A&E curriculum, teaching methods, undergraduate exposure and departmental details. RESULTS: The majority of A&E departments operated during normal working hours with a minority offering an out-of-hours service. Teaching of A&E topics, and undergraduate experience, vary significantly between schools. A&E departments were diversely named and exhibited significant regional variation. Approximately half employed a triage system. It is unclear what represents an adequate level of undergraduate exposure, and more research is required in this area. CONCLUSIONS: Assessment of undergraduates following time in clinic is an important component of any A&E module. We consider a reflective portfolio to represent a suitable form of assessment, and would recommend their introduction. In addition, we recommend that dental hospitals consider a nurse-led triage system.


Assuntos
Medicina de Emergência/educação , Serviço Hospitalar de Emergência/estatística & dados numéricos , Faculdades de Odontologia/estatística & dados numéricos , Currículo/estatística & dados numéricos , Humanos , Irlanda , Faculdades de Odontologia/organização & administração , Inquéritos e Questionários , Reino Unido
16.
Endocrinology ; 133(3): 1108-15, 1993 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-8365356

RESUMO

Platelet-activating factor (PAF) and the prostaglandins have recently been shown to stimulate atrial natriuretic factor (ANF) secretion from the heart. As PAF also potentiates the release of cyclooxygenase products from isolated hearts, the role of these substances in PAF-induced ANF secretion was investigated. Using an isolated perfused rat heart preparation, cyclooxygenase inhibition by indomethacin or meclofenamic acid (10 microM for each) significantly attenuated the rise in ANF associated with PAF administration (2.5 nmol). Prostaglandin F2 alpha (PGF) produced an immediate and dose-dependent increase in ANF secretion, which was significant at 0.01 mumol and reached 348 +/- 66% over baseline values after a 1-mumol injection. Prostaglandin E2 (PGE) generated a much smaller 98 +/- 25% increase after a 1-mumol administration. Furthermore, PGF but not PGE was released from isolated hearts immediately after PAF administration. PGF release reached a maximum of 0.06 nmol/min g Heart-1 1 min after PAF stimulation and had returned to undetectable baseline values by 6 min. Cyclooxygenase inhibition abolished the release of PGF after PAF, in addition to attenuating (by 60-70%) the increased secretion of ANF after PAF injection. These results demonstrate very clearly that PGF is the major mediator for PAF-stimulated ANF secretion. Such an interaction may provide an alternative mechanism to atrial distension for the secretion of ANF in pathologies such as myocardial infarction, where autacoids such as PAF and the PGs are released from damaged cardiac muscle and elevated plasma levels of ANF are observed.


Assuntos
Fator Natriurético Atrial/metabolismo , Dinoprosta/farmacologia , Coração/fisiologia , Fator de Ativação de Plaquetas/farmacologia , Animais , Dinoprostona/farmacologia , Coração/efeitos dos fármacos , Frequência Cardíaca/efeitos dos fármacos , Indometacina/farmacologia , Cinética , Masculino , Ácido Meclofenâmico/farmacologia , Contração Miocárdica/efeitos dos fármacos , Perfusão , Prostaglandinas E/metabolismo , Prostaglandinas F/metabolismo , Ratos
17.
Br J Pharmacol ; 82(3): 609-14, 1984 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-6743915

RESUMO

The effects of multivalent cations, membrane potential and temperature on caffeine contractures of rat soleus and extensor digitorus longus (e.d.l.) muscles were investigated. The amplitude of the caffeine contracture was depressed by the removal of calcium and by the addition of a high concentration (1 mM) of lanthanum. Low concentrations of lanthanum (0.1-0.5 mM) augmented the caffeine contracture. Low levels of depolarization by potassium (10-40 mM) augmented the amplitude of the caffeine contracture, while higher concentrations of potassium depressed the contracture. Maximum augmentation of the caffeine contracture occurred with a higher concentration of potassium (20 mM vs 10 mM) in the e.d.l. than in the soleus muscle. The amplitude of contractures was directly related to temperature between 22 and 37 degrees C and inversely related to temperature below 22 degrees C. The effects of caffeine in rat skeletal muscle are suggested to be exerted on the sarcolemma and the mechanisms of action are by modification of the processes of activation and inactivation.


Assuntos
Cafeína/farmacologia , Cálcio/farmacologia , Contração Muscular/efeitos dos fármacos , Músculos/efeitos dos fármacos , Temperatura , Animais , Cátions , Feminino , Técnicas In Vitro , Lantânio/farmacologia , Potenciais da Membrana/efeitos dos fármacos , Músculos/fisiologia , Potássio/farmacologia , Ratos , Ratos Endogâmicos
18.
Br J Pharmacol ; 82(3): 615-21, 1984 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-6743916

RESUMO

The effects of cations, temperature and tetracaine on potassium-induced contractures of rat soleus and extensor digitorus longus (e.d.l.) muscles were investigated. In the soleus, the threshold for the potassium contracture was lower (10-20 vs 20-40 mM), the peak amplitude was up to fourteen times larger, and the time course was about one half that in the e.d.l. muscle. The extent of inactivation of a test potassium contracture was directly related to the concentration of potassium in the conditioning solution and the period of exposure. Removal of calcium reduced the amplitude and time course of potassium contractures in both preparations. Addition of cobalt (10 mM) reduced the amplitude but prolonged the time course of contractures. Exposure of muscles to tetracaine (10(-5)-10(-6) M for 30 min) increased, but higher concentrations reduced, the amplitude of potassium contractures. When present for one minute, tetracaine (1 mM) moved the potassium activation curve to higher, and the potassium inactivation curve to lower, potassium concentrations.


Assuntos
Contração Muscular/efeitos dos fármacos , Músculos/efeitos dos fármacos , Potássio/farmacologia , Temperatura , Tetracaína/farmacologia , Animais , Cálcio/farmacologia , Cátions , Cobalto/farmacologia , Relação Dose-Resposta a Droga , Feminino , Técnicas In Vitro , Músculos/fisiologia , Ratos
19.
Am J Kidney Dis ; 34(6): 1105-13, 1999 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-10585321

RESUMO

The presence of late potentials (LPs) on signal-averaged electrocardiography (SAECG) is predictive of ventricular tachycardia. The effect of hemodialysis (HD) on SAECG has not been well studied. SAECG was evaluated in 28 patients with chronic renal failure immediately before and after HD. In each SAECG, QRS duration, low-amplitude signal duration (LASd), and root-mean-square voltage of the terminal 40 milliseconds of the QRS (RMS40) were measured. To evaluate the effect of fluid removal on SAECG, the last 12 patients were studied during two different HD sessions, one with and one without fluid removal. Two-dimensional echocardiography was performed before and after HD on these 12 patients. At baseline, four patients met the criteria for LPs on SAECG. Only one patient met the criteria for LPs on SAECG after HD. After HD, the mean LASd decreased (28.3 +/- 12.9 to 24.9 +/- 10.1 milliseconds; P = 0.041) and RMS40 increased (63.0 +/- 56.9 to 79.0 +/- 59.2 microV; P = 0. 006). Among the 12 patients who underwent HD with and without fluid removal, left ventricular end-diastolic dimension decreased with (5. 4 +/- 0.6 to 5.1 +/- 0.6 cm; P = 0.024) but not without fluid removal (5.2 +/- 0.3 to 5.1 +/- 0.4 cm; P = not significant [NS]). RMS40 improved with (43.8 +/- 23.1 to 53.2 +/- 22.6 microV; P = 0. 03) but not without fluid removal (51.0 +/- 26.5 to 51.5 +/- 24.2 microV; P = NS). A significant negative correlation was found between change in body weight and change in RMS40 parameter (r = 0. 456; P = 0.0381). SAECG parameters are abnormal in a significant proportion of patients with chronic renal failure and improve with HD despite electrolyte and other proarrhythmic changes. Decreased left ventricular dimension because of fluid removal during HD is one possible explanation for this improvement.


Assuntos
Eletrocardiografia , Diálise Renal , Processamento de Sinais Assistido por Computador , Feminino , Humanos , Falência Renal Crônica/fisiopatologia , Falência Renal Crônica/terapia , Masculino , Pessoa de Meia-Idade
20.
Hum Pathol ; 23(4): 381-94, 1992 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-1563738

RESUMO

Metastatic malignant disease is the single most common cause of treatment failure and subsequent mortality of most human malignancies, including prostate cancer. Presently, cells expressing the metastatic phenotype cannot be identified within a primary tumor population. Hence, accurate assessment of the likely behavior of an individual primary malignancy cannot be made at the time of diagnosis. The studies now reported have been aimed at identifying some of the features that may be associated with the metastatic phenotype of prostatic cancer. Insight into those factors that may be involved in prostate cancer metastasis has been gained from a variety of experimental approaches as well as study of intact human prostate cancers.


Assuntos
Biomarcadores Tumorais , Oligossacarídeos/metabolismo , Neoplasias da Próstata/patologia , Animais , Sequência de Carboidratos , Citometria de Fluxo , Genes Supressores de Tumor , Humanos , Masculino , Dados de Sequência Molecular , Metástase Neoplásica/genética , Oncogenes , Fenótipo , Neoplasias da Próstata/genética , Neoplasias da Próstata/metabolismo
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