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1.
Brain Inj ; 33(9): 1245-1256, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31304792

RESUMO

Primary Objective: The primary aim of this study was to determine the frequency of severe impaired self-awareness (ISA) in patients with severe traumatic brain injury (TBI) and the correlates of selected clinical, neuropsychiatric and cognitive variables. The secondary aim of the study was to assess depression and apathy on the basis of their level of self-awareness. Methods: Thirty patients with severe TBI and 30 demographically matched healthy control subjects (HCs) were compared on measures of ISA, depression, anxiety, alexithymia, neuropsychiatric symptoms and cognitive flexibility. Results: Twenty percent of the patients demonstrated severe ISA. Severe post-acute ISA was associated with more severe cognitive inflexibility, despite the absence of differences in TBI severity, as evidenced by a Glasgow Coma Scale (GCS) score lower than 9 in all cases in the acute phase. Patients with severe ISA showed lower levels of depression and anxiety but tended to show more apathy and to have greater difficulty describing their emotional state than patients with severe TBI who showed minimal or no disturbance in self-awareness. Conclusion: These findings support the general hypothesis that severe ISA following severe TBI is typically not associated with depression and anxiety, but rather with apathy and cognitive inflexibility.


Assuntos
Apatia , Lesões Encefálicas Traumáticas/complicações , Lesões Encefálicas Traumáticas/psicologia , Depressão/etiologia , Depressão/psicologia , Autoavaliação (Psicologia) , Adulto , Sintomas Afetivos/etiologia , Sintomas Afetivos/psicologia , Idoso , Conscientização , Transtornos Cognitivos/etiologia , Transtornos Cognitivos/psicologia , Feminino , Escala de Coma de Glasgow , Humanos , Masculino , Transtornos Mentais/etiologia , Transtornos Mentais/psicologia , Pessoa de Meia-Idade , Testes Neuropsicológicos , Adulto Jovem
2.
Geophys Res Lett ; 44(21): 11051-11061, 2017 11 16.
Artigo em Inglês | MEDLINE | ID: mdl-29263561

RESUMO

Greenland's bed topography is a primary control on ice flow, grounding line migration, calving dynamics, and subglacial drainage. Moreover, fjord bathymetry regulates the penetration of warm Atlantic water (AW) that rapidly melts and undercuts Greenland's marine-terminating glaciers. Here we present a new compilation of Greenland bed topography that assimilates seafloor bathymetry and ice thickness data through a mass conservation approach. A new 150 m horizontal resolution bed topography/bathymetric map of Greenland is constructed with seamless transitions at the ice/ocean interface, yielding major improvements over previous data sets, particularly in the marine-terminating sectors of northwest and southeast Greenland. Our map reveals that the total sea level potential of the Greenland ice sheet is 7.42 ± 0.05 m, which is 7 cm greater than previous estimates. Furthermore, it explains recent calving front response of numerous outlet glaciers and reveals new pathways by which AW can access glaciers with marine-based basins, thereby highlighting sectors of Greenland that are most vulnerable to future oceanic forcing.

3.
J Prev Med Hyg ; 58(2): E190-E194, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28900361

RESUMO

INTRODUCTION: In stoma care, patient education is often weak in terms of improving patients' level of acceptance of living with a stoma. Self-care educational interventions in enterostomal patients, which according to Orem's Theory should take into account these patients' specific needs, require instruments that measure patients' stoma acceptance to improve motivation based on the resumption of activities they used to carry out before having a stoma. The aim of the study was to develop an instrument that measures the level of stoma acceptance to improve motivation to adhere to enterostoma self-care. METHODS: Aspects that improve stoma acceptance and consequently motivation to adhere to enterostoma self-care were identified through 10 focus groups. In the focus groups, the motivation indicators were grouped, categorised and results entered into a Stoma Acceptance Questionnaire (SAQ). The SAQ was then piloted with 104 enterostomal patients from three general hospitals. To assess the construct validity of the SAQ, Mokken Scaling was used to explore the latent structure of the SAQ. Mokken scaling is a non-parametric method that falls under the umbrella of methods described as item response theories (IRT). RESULTS: The theme "Living with a stoma"; "Autonomy"; "Support"; "Ability to deal with stoma", plus a common underlying theme: "Stoma acceptance" were dissussed by the Focus Groups. The experts identified the items of the (SAQ) through these themes. Mokken Scaling identified the "resumption of enterostomal patients' normal activities" as a measure of stoma acceptance, thus confirming the construct validity of the SAQ. CONCLUSIONS: The tool proposed affords a pioneering example of how this gap can be bridged. Indeed, the SAQ could enable nurses adopting a standardized approach for the assessment of enterostomal patients' motivation to resume their normal activities and identify needs linked to this. The SAQ could also be used to measure the effectiveness of psychosocial and educational interventions aimed at improving stoma acceptance.


Assuntos
Motivação , Autocuidado , Estomas Cirúrgicos , Inquéritos e Questionários , Grupos Focais , Comportamentos Relacionados com a Saúde , Humanos , Educação de Pacientes como Assunto
4.
Ann Ig ; 27(5): 760-8, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26661917

RESUMO

INTRODUCTION: In order to develop an effective and accountable nursing practice is necessary to launch research projects through coordinated studies and one of the main strategies to achieve this goal is to define research priorities. METHODS: he aim of this study is define the nursing priority research in Internal Medicine and explore the possibility to define the nursing priority research in Internal Medicine. This is an observational study using a three-round Delphi method. RESULTS: Fifty-five nurses (77%) completed all three rounds. Two hundred eighty-four research priorities were recorded, organized in eighty areas. The technical - care and organized - management are the areas in which were identify more priorities. CONCLUSIONS: The top five priorities, identify as the most important, suggest the attention of Italian nurses in care of patients, management and in safe-care.


Assuntos
Medicina Interna/organização & administração , Enfermeiras e Enfermeiros/organização & administração , Pesquisa em Enfermagem/organização & administração , Adulto , Técnica Delphi , Feminino , Humanos , Itália , Masculino , Pessoa de Meia-Idade
5.
Lupus ; 21(6): 672-4, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22236910

RESUMO

The immunopathogenesis of systemic lupus erythematosus has been thoroughly investigated recently, and genome-wide association studies have identified genes statistically associated with lupus. However, the progression to overt disease is dependent on the activation of environmental factors ('triggers'), among which oestrogen stimulation is prominent. Here we report the case of a mother with long-standing SLE entering into long term drug-free remission following intensive, menopause-inducing chemoradiotherapy for cancer, and the opposite case of her daughter, who developed SLE following the initiation of her menstrual cycle.


Assuntos
Neoplasias do Ânus/terapia , Quimiorradioterapia , Lúpus Eritematoso Sistêmico/genética , Lúpus Eritematoso Sistêmico/fisiopatologia , Remissão Espontânea , Adolescente , Corticosteroides/uso terapêutico , Estrogênios/fisiologia , Feminino , Humanos , Lúpus Eritematoso Sistêmico/tratamento farmacológico , Menopausa/fisiologia , Menstruação/fisiologia , Pessoa de Meia-Idade , Linhagem , Resultado do Tratamento
6.
Clin Exp Rheumatol ; 29(3): 555-9, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21722503

RESUMO

The development of malignant lymphomas, generally of the non-Hodgkin type (NHL), and with a preference to diffuse large cell B lymphomas (DLCBL), in systemic lupus erythematosus (SLE), has been analysed in an exhaustive recent literature. The combination of germline and somatic mutations, persistent immune overstimulation and the impairment of immune surveillance facilitated by immunosuppressive drugs, is thought to be at the origin of the increased lymphoma genesis. However the treatment and course of such affected patients is less known, and prognosis is generally estimated as poor. Out of 258 patients with complete/incomplete lupus and secondary antiphospholipid syndrome (APS) seen and treated at the institutional Day Hospital between 1982 and 2009, 6 developed lymphomas (4 DLCBL, 1 Hodgkin's and 1 indolent lymphocytic lymphoma). The first 5 patients were treated with high dose chemotherapy (HDCT) and achieved complete remissions (CR) with a follow-up comprised between 13 and 172 months. One patient relapsed of lymphoma and died 15 months following CR, with persistent lupus serology. One patient achieved complete remission (CR) of both diseases. In the other 3 lupus serology, Antinuclear and antiphospholipid antibodies (ANA, aPL) persisted, with occasional lupus flares and vascular complications. While eradication of the last cancer stem cell is tantamount to cure in neoplastic disease, persistent autoantigenic overstimulation may contribute to the refractoriness of autoimmunity. The implications of these results for the increasing utilisation of haematopoietic stem cell transplantation for severe autoimmune diseases (SADS), with lupus as a paradigm, are discussed.


Assuntos
Antineoplásicos/uso terapêutico , Lúpus Eritematoso Sistêmico/complicações , Linfoma/tratamento farmacológico , Linfoma/etiologia , Adulto , Relação Dose-Resposta a Droga , Tratamento Farmacológico , Feminino , Seguimentos , Doença de Hodgkin/tratamento farmacológico , Doença de Hodgkin/etiologia , Humanos , Linfoma Difuso de Grandes Células B/tratamento farmacológico , Linfoma Difuso de Grandes Células B/etiologia , Pessoa de Meia-Idade , Recidiva , Indução de Remissão , Estudos Retrospectivos , Resultado do Tratamento
7.
G Chir ; 32(4): 206-10, 2011 Apr.
Artigo em Italiano | MEDLINE | ID: mdl-21554853

RESUMO

Venous thromboembolism (VTE) is a frequent complication in patients undergoing major surgery, with the possibility of long-term disability or fatal outcome. The rationale of the thromboprophylaxis in all patients can be summarized in three points: 1) the VTE is common in some types of surgery; 2) the VTE can be fatal; 3) thromboprophylaxis is highly effective and safe and, besides these clinical benefits, leads to lower total costs of treatment without further diagnostic and a new shelter for treating venous thrombosis. The surgical patients may present at admission one or more risk factors for VTE, The effect of this risk is cumulative, it is important to stratify the risk and to established an adequate prophylactic strategy. Today there is a unanimous consensus that the low molecular weight heparins are both effective and safe in preventing VTE in surgical patients. Unanimously approved guidelines can help surgeons in making decisions regarding VTE prophylaxis.


Assuntos
Procedimentos Cirúrgicos Operatórios/efeitos adversos , Tromboembolia Venosa/etiologia , Tromboembolia Venosa/prevenção & controle , Humanos , Fatores de Risco , Tromboembolia Venosa/epidemiologia
8.
J Prev Med Hyg ; 61(2): E246-E258, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32803011

RESUMO

INTRODUCTION: The incidence of cutaneous melanoma is increasing, although 80-95% of all deaths caused by melanoma can be avoided through protective behaviours. There is evidence that social marketing as an approach in public health can improve health-related behaviours and encourage sun-safe behaviours. METHODS: A multicentre survey was conducted to collect and compare data about cutaneous melanoma risk, knowledge, concern, and protective behaviours across Northern, Central, and Southern Italy, and explore how these data could potentially inform a social marketing intervention to improve sun-safe behaviours. Data were analysed using descriptive and inferential statistics. RESULTS: A total of 1,028 questionnaires were collected. Apart from 'Personal Risk' no statistically significant differences were found between the three regions. About 30% (n = 344) of the total sample had high levels of personal risk, and low levels of concern and protective behaviour, and over 70% (n = 711) gave priority to sun tanning. The worst scores were related to knowledge about melanoma (30% wrong answers, and over 40% 'don't know'). Protective behaviour was moderately correlated with age (p = 0.03). Personal risk was significantly higher in women (10.84 vs 10.05), and lower in individuals with a degree (9.46 vs 11.38; p < 0.001). CONCLUSIONS: Over 70% of our sample gave priority to sun tanning, which combined with low levels of concern and knowledge about melanoma, and high levels of personal risk, confirm that much still needs to be done in terms of melanoma prevention, but all these are aspects that could be effectively addressed through social marketing interventions.


Assuntos
Comportamentos Relacionados com a Saúde , Melanoma/prevenção & controle , Comportamento de Redução do Risco , Neoplasias Cutâneas/prevenção & controle , Marketing Social , Adulto , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Inquéritos Epidemiológicos , Humanos , Itália , Masculino , Pessoa de Meia-Idade , Saúde Pública , Adulto Jovem , Melanoma Maligno Cutâneo
9.
J Prev Med Hyg ; 60(3): E219-E225, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31650057

RESUMO

INTRODUCTION: There is a dearth of literature that specifically addresses the handover reporting process among healthcare staff working in children's Emergency Department (ED). Widespread gaps in service provision, such as gaps in communication in handover reports to ambulance staff have been noted in the general literature on the topic. There are also improvements observed in handover when a structured mnemonic was encouraged. Structured reports improve communication, safety and may reduce medication errors. Thus, the improvement of handover reporting in children's ED has important implications for children's healthcare practice. However, little is known about communication processes during handover reports in Italian children's ED or its consequences for errors or risks. METHODS: A qualitative description methodology was used. Semi-structured interviews were used to collect data from five children's ED nurses. Thematic content analysis was used to identify common themes. RESULTS: Emergent themes were: interpersonal influences on handover; structural issues; and local contextual factors. CONCLUSIONS: The findings of this pilot study prompted the need for a standardized tool that improves communication during handover. As such, standardizing the communication process during handover could be effectively resolved by using a mnemonic tool adapted for handover in a paediatric emergency department.


Assuntos
Comunicação , Serviço Hospitalar de Emergência , Enfermeiros Pediátricos , Transferência da Responsabilidade pelo Paciente , Humanos , Itália , Segurança do Paciente , Projetos Piloto , Pesquisa Qualitativa , Melhoria de Qualidade
10.
G Chir ; 29(10): 417-20, 2008 Oct.
Artigo em Italiano | MEDLINE | ID: mdl-18947464

RESUMO

The epigastric hernia represents a rare surgical affection, sometimes insidious, whose pathogenesis has been discussed for a long time, revealing, in the course of the years, multiple predisposing and responsible factors of its appearance. From our experience and the data reported in the literature, it is clear that a standard surgery does not exist for this pathology, and it is often necessary to perform preliminary uncommon diagnostic exams. Our retrospective study consists in the analysis of the surgical treatments executed, from 2003 to 2006, on 37 patients suffered from epigastric hernia, for everyone of which, on the basis of the clinical features, of the preoperative diagnostic results and of the characteristics of the hernia defect, it has been encouraged a personalized surgical procedure,obtaining therefore, for the same pathology, different treatment protocols (open or laparoscopic procedures, ordinary hospital stay or day-surgery, prosthetic or not surgical repair).


Assuntos
Procedimentos Cirúrgicos do Sistema Digestório/métodos , Hérnia Ventral/cirurgia , Adulto , Idoso , Feminino , Hérnia Ventral/diagnóstico , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento
11.
G Chir ; 29(3): 98-101, 2008 Mar.
Artigo em Italiano | MEDLINE | ID: mdl-18366889

RESUMO

The use of dermic substitutes is a valid and effective choice in the treatment of the cutaneous defects with loss of substance. In our experience, the aesthetic and functional results of dermic substitutes is really positive and encouraging, with better tolerance by patients than the autologue grafts.


Assuntos
Pele Artificial/estatística & dados numéricos , Úlcera Varicosa/cirurgia , Idoso , Curetagem , Feminino , Seguimentos , Humanos , Fatores de Tempo , Resultado do Tratamento
13.
G Chir ; 28(11-12): 435-8, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-18035012

RESUMO

Our study reports peritoneal diffuse malignant mesothelioma (DMM) in a 43 years old male patient, with no exposure to asbestos in his medical history; the partner of the patient was also not exposed to asbestos. The exposure to X-rays was also excluded. Different pathogenic mechanisms for the pathogenesis of a peritoneal diffuse malignant mesothelioma in this patient can be hypothesized, for example, SV40 infection and genetic susceptibility; a minimal domestic exposure to asbestos can be not excluded. Therefore, further studies in a larger number of subjects are necessary to determine whether one or all of these hypothetic pathogenic mechanisms are more significant for the development of malignant mesothelioma.


Assuntos
Mesotelioma/etiologia , Mesotelioma/cirurgia , Neoplasias Peritoneais/etiologia , Neoplasias Peritoneais/cirurgia , Adenocarcinoma/etiologia , Adenocarcinoma/cirurgia , Adulto , Amianto/efeitos adversos , Exposição Ambiental/efeitos adversos , Secções Congeladas , Predisposição Genética para Doença , Humanos , Masculino , Infecções por Polyomavirus/complicações , Vírus 40 dos Símios , Infecções Tumorais por Vírus/complicações
14.
G Chir ; 27(6-7): 262-4, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17062196

RESUMO

Cecal adenocarcinoma within an inguinal hernial sac is an uncommon clinical condition. A primary adenocarcinoma of the cecum in a right sided inguinal hernia is presented and discussed. This case represents one of the unexpected findings in a hernia sac and also very rare septic evolution. This particular condition is a main dignostic and therapeutic challenge.


Assuntos
Parede Abdominal , Abscesso , Adenocarcinoma , Neoplasias do Ceco , Hérnia Inguinal/complicações , Abscesso/complicações , Abscesso/diagnóstico , Abscesso/cirurgia , Adenocarcinoma/complicações , Adenocarcinoma/diagnóstico , Adenocarcinoma/diagnóstico por imagem , Adenocarcinoma/patologia , Adenocarcinoma/cirurgia , Idoso , Neoplasias do Ceco/complicações , Neoplasias do Ceco/diagnóstico , Neoplasias do Ceco/diagnóstico por imagem , Neoplasias do Ceco/patologia , Neoplasias do Ceco/cirurgia , Ceco/patologia , Hérnia Inguinal/diagnóstico , Hérnia Inguinal/diagnóstico por imagem , Hérnia Inguinal/cirurgia , Humanos , Masculino , Radiografia Abdominal , Tomografia Computadorizada por Raios X
15.
G Chir ; 27(11-12): 411-6, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17198549

RESUMO

This retrospective study shows that endoscopic polypectomy is the technique of choice to remove the majority of polyps; follow-up and pathologic examinations shed light on the carcinogenesis of colorectal lesions. From January 1990 to December 2001, 1302 adenomatous polyps were removed, 1175 endoscopically, 127 with surgical procedures. The anatomical and morphologic conditions of the colon and some characteristics of the polyps represent limits to the feasibility and to the efficacy of polypectomy, and the most important variables for the correct management of the patients affected by colorectal adenomatous polyps.


Assuntos
Polipose Adenomatosa do Colo/patologia , Polipose Adenomatosa do Colo/cirurgia , Endoscopia , Polipose Adenomatosa do Colo/classificação , Polipose Adenomatosa do Colo/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Colo/patologia , Colonoscopia , Estudos de Viabilidade , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Reto/patologia , Estudos Retrospectivos , Fatores de Tempo , Organização Mundial da Saúde
16.
Thromb Res ; 140 Suppl 1: S177, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27161692

RESUMO

BACKGROUND: Recent studies show that the risk of VTE in NHL pts is similar to that observed in high risk solid tumors (i.e. pancreatic, ovarian cancer). VTE in NHL occurs in most cases within three months from diagnosis and can have substantial impact on treatment delivery and outcome as well as on quality of life. However few data are available on potential predictors. AIMS: To better clarify the epidemiology of early (within six months from treatment start) VTE in NHL we conducted a pooled data analysis of 12 clinical trials from FIL. Our analysis included basic demographic features, lymphoma-related characteristics as well the Khorana score (based on histology, BMI, platelets WBC and HB counts) which is extensively used in solid tumors to predict VTE risk. PATIENTS AND METHODS: From Jan. 2010 to Dec. 2014, all pts with B-cell NHL enrolled in prospective clinical trials from FIL for frontline treatment were included. For 9 studies study period included the entire trial population was included. The analyses were conducted based on CRFs as well as pharmacovigilance reports. VTE definition and grading was stated according to standard criteria of toxicity (CTCAE V4.0). Cumulative incidence of VTE from the study enrollment was estimated using the method described by Gooley et al. accounting for death from any causes as a competing risk. The Fine & Gray survival model was used to identify predictors of VTE among NHL pts. Factors predicting the grade of VTE were investigated using an ordinal logistic regression model. This pooled data analysis was approved by local IRB. RESULTS: Overall, 1,717 patients belonging to 12 studies were evaluated. Eight were phase I/II or II (25% of pts) and 4 phase III (75% of pts). M/F ratio was 1.41, Median age was 57, (IQ range (IQR) 49-66). Histologies were: DLCL-B 34%, FL 41%, MCL 18%, other 6%. Median BMI was 25 (IQR 22-28). Median Hb, WBC and platelets counts were 13g/dl) (IQR 11.5-14.2), 7.1*10^(9)/l (IQR 5.6-10.3), 224*10^(9)/l (IQR 169-298), respectively. 1189 pts were evaluable Khorana score: 58% low risk, 30% intermediate risk, 12% were high risk. Human erythropoetin support was given to 9% of patients. All pts received Rituximab. Planned therapeutic programs included ASCT in 27% of pts, conventional chemotherapy in 67% a conventional chemotherapy plus lenalidomide in 6%. Overall 59 any grade VTE episodes occurred in 51 pts (2.9%), including 21 grade III-IV VTE (18 pts). None was fatal. Median time from study enrolment to VTE was 63 days (IQR: 35-110). Considering death as a competitive event the 6 months cumulative incidence of VTE was 2,2% in low risk Khorana score, 4.5% (95%IC: 2.3-6.7) in intermediate and 6.6% (95%IC: 2.4-10.8) in high risk (p=0.012) (figure 1). Khorana score was predictive also for grade III-IV events as they were 0,7% (95% CI:0.1-1.4) in low risk and 2.0% (95% CI:0.8-3.3) in intermediate-high risk (p=0.048). The results were similar also after excluding lenalidomide containing studies. The Fine and Gray multivariate analyses, adjusted for age and stage, showed that Khorana score (intermediate risk adjHR=1.96; 95%IC: 0.84-4.56 and high risk adjHR=3.81; 95%IC: 1.51-9.58) and DLCL-B histotype (adjHR=2.58; 95% CI: 1.01-6.55) were independently associated to an increased risk of VTE. Moreover an ordinal logistical regression model indicated that the increase of one point in the Khorana score resulted in an increased risk of VTE (OR=1.85; 95% CI: 1.23-2.79). CONCLUSIONS: Our results suggest that DLCL-B histotype and Khorana score are predictors of VTE in NHL. The latter might become a simple and effective tool to assess the risk of VTE in NHL. Prospective validation including also patients not eligible for clinical trials is needed.

17.
J Appl Physiol (1985) ; 74(2): 704-9, 1993 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-8458785

RESUMO

In normal subjects the thyroarytenoid muscle (TA), a vocal cord adductor, has phasic expiratory activity during wakefulness that disappears during non-rapid-eye-movement (NREM) sleep. Fiber-optic studies have reported absent or irregular vocal cord movements during obstructive apneas and vocal cord adduction during central apneas. This study was designed to investigate TA activity during NREM sleep in 14 subjects with sleep apnea by means of intramuscular wire electrodes. During central apneas, which were recorded in three subjects, continuous TA activity was observed. During obstructive apneas, which were recorded in all subjects, two different patterns of TA activity were observed: 1) absence of any activity until arousal and 2) phasic activity throughout the apnea. The first pattern was detected in six subjects, whereas both patterns were observed in the remaining eight subjects. No correlation was found between obstructive apnea characteristics and presence or absence of TA activity. In all subjects TA underwent a marked activation during arousal. While nasal continuous positive airway pressure was applied during NREM sleep TA activity was always absent. The persistence of TA activity during central apneas suggests that they may represent an extreme prolongation of neural expiratory discharge. We speculate that a variable interaction of different stimuli acting during obstructive apnea may activate TA, which, in turn, may contribute to glottic narrowing.


Assuntos
Músculos Laríngeos/fisiopatologia , Síndromes da Apneia do Sono/fisiopatologia , Adulto , Eletrodos , Eletromiografia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Polissonografia , Respiração com Pressão Positiva
18.
J Appl Physiol (1985) ; 70(6): 2410-6, 1991 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-1885434

RESUMO

Previous fiber-optic studies in humans have demonstrated narrowing of the glottic aperture in expiration during application of expiratory resistive loads. Nine healthy subjects were studied to determine the effect of expiratory resistive loads on the electromyographic activity of the thyroarytenoid (TA) muscle, a vocal cord adductor. Four of the nine subjects also underwent the application of inspiratory resistive loads and voluntary prolongation of either inspiratory (TI) or expiratory (TE) time. TA activity was recorded by intramuscular hooked-wire electrodes. During quiet breathing in all subjects, the TA was phasically active on expiration and often tonically active throughout the respiratory cycle. TA expiratory activity progressively increased with increasing levels of expiratory load. Inspiratory loads resulted in increased TA "inspiratory" activity. Voluntary prolongation of TE to times similar to those reached during loaded breathing induced increases in TA expiratory activity similar to those reached during the loaded state. Voluntary prolongation of TI was associated with an increase in TA inspiratory activity. Similar increases in TI during inspiratory loading or voluntary conditions were associated with comparable increases in TA inspiratory activity in three of the four subjects. In conclusion, increased activation of TA during the application of expiratory resistive loads implies that the reported narrowing of glottic aperture during expiratory loading is an active phenomenon. Changes in activation of the TA with resistive loads appear to be related to changes in respiratory pattern.


Assuntos
Músculos Laríngeos/fisiologia , Mecânica Respiratória/fisiologia , Adulto , Resistência das Vias Respiratórias/fisiologia , Eletromiografia , Feminino , Humanos , Masculino
19.
J Biomech ; 31(3): 289-94, 1998 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-9645545

RESUMO

Mathematical tools for the analysis of nonlinear dynamical systems are applied to the study of stability of bone remodeling theories. As a practical application, the same problem studied by Harrigan and Hamilton (1992) and Cowin et al. (1994b) is analysed using these tools, and their findings on the necessary and sufficient conditions to ensure local asymptotic stability are easily confirmed. Using a general approach based on Lyapunov's method the same condition has been found to be necessary and sufficient also for the global asymptotic stability, thus confirming a result obtained by Harrigan and Hamilton (1994) by variational methods applied to finite-element models. The proof is based on the discretization of the spatial domain but the results for the continuum can be easily extrapolated.


Assuntos
Remodelação Óssea/fisiologia , Modelos Biológicos , Dinâmica não Linear , Animais , Fenômenos Biomecânicos , Humanos
20.
Otol Neurotol ; 22(1): 66-9, 2001 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-11314719

RESUMO

OBJECTIVE: The purpose of this study was to determine the effectiveness of a new liberatory maneuver in the management of the geotropic variant of horizontal canal paroxysmal positional vertigo (HC-PPV). STUDY DESIGN: Case review. SETTING: Outpatient clinic. PATIENTS: The diagnosis of HC-PPV was based on the history of recurrent sudden crisis of vertigo associated with bursts of horizontal geotropic paroxysmal nystagmus provoked by turning the head from the supine to either lateral position. The patients were 11 men and 21 women ranging in age from 30 to 85 years (average 55.43 years), and the average duration of symptoms was 7.68 days. INTERVENTIONS: All patients were treated with a liberatory maneuver based on the hypothesis that the syndrome is caused by the presence of free-floating dense particles inside the endolymph of the posterior arm of the semicircular horizontal canal. The maneuver favors their outmigration into the utricle. Patients were reexamined immediately after the treatment and again 2 days later. MAIN OUTCOME MEASURE: The treatment outcome was considered as responsive when, after one or more liberatory maneuvers, the clinical signs of PPV disappeared at the end of physical therapy. RESULTS: The liberatory maneuver resulted in a complete remission of the positioning vertigo and nystagmus in all patients after the first session. CONCLUSIONS: This approach represents a simple and effective approach to the management of the geotropic form of HC-PPV.


Assuntos
Nistagmo Patológico/diagnóstico , Decúbito Dorsal , Vertigem/diagnóstico , Vertigem/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Índice de Gravidade de Doença
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