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1.
Prehosp Emerg Care ; : 1-6, 2023 Oct 06.
Artigo em Inglês | MEDLINE | ID: mdl-37800855

RESUMO

INTRODUCTION: Emergency medical services (EMS) facilitated telemedicine encounters have been proposed as a strategy to reduce transports to hospitals for patients who access the 9-1-1 system. It is unclear which patient impressions are most likely able to be treated in place. It is also unknown if the increased time spent facilitating the telemedicine encounter is offset by the time saved from reducing the need for transport. The objective of this study was to determine the association between the impressions of EMS clinicians of the patients' primary problems and transport avoidance, and to describe the effects of telemedicine encounters on prehospital intervals. METHODS: This was a retrospective review of EMS records from two commercial EMS agencies in New York and Tennessee. For each EMS call where a telemedicine encounter occurred, a matched pair was identified. Clinicians' impressions were mapped to the corresponding category in the International Classification of Primary Care, 2nd edition (ICPC-2). Incidence and rates of transport avoidance for each category were determined. Prehospital interval was calculated as the difference between the time of ambulance dispatch and back-in-service time. RESULTS: Of the 463 prehospital telemedicine evaluations performed from March 2021 to April 2022, 312 (67%) avoided transports to the hospital. Respiratory calls were most likely to result in transport avoidance (p = 0.018); no other categories had statistically significant transport rates. Four hundred sixty-one (99.6%) had matched pairs identified and were included in the analysis. When compared to the matched pair, telemedicine without transport was associated with a prehospital interval reduction in 68% of the cases with a median reduction of 16 min; this is significantly higher than telemedicine with transport when compared to the matched pair with a median interval increase in 27 min. Regardless of transport status, the prehospital interval was a median of 4 min shorter for telemedicine encounters than non-telemedicine encounters (p = 0.08). CONCLUSION: In this study, most telemedicine evaluations resulted in ED transport avoidance, particularly for respiratory issues. Telemedicine interventions were associated with a median four-minute decrease in prehospital interval per call. Future research should investigate the long-term effects of telemedicine on patient outcomes.

2.
Aust N Z J Psychiatry ; 54(10): 970-984, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32475125

RESUMO

BACKGROUND: Children and adolescents with intellectual disability are at risk of developing psychiatric symptoms and disorders; yet, the estimates reported in the literature have been inconsistent, presenting a potential barrier for service planning and delivery. Sources of variability could arise from differences in measurement instruments as well as subgroup membership by severity of intellectual disability, gender and age. This systematic review aimed to address these gaps. METHOD: MEDLINE and PsycINFO databases were searched from inception to 2018 and selected studies were reviewed. Studies were included if they reported point prevalence estimates of mental health symptomology or diagnoses in a general population of 6- to 21-year-old individuals with intellectual disability. The Joanna Briggs Institute Prevalence Critical Appraisal Checklist was applied to eligible papers to appraise their scientific strength. Pooled prevalence for mental health symptomology was determined using a random-effects meta-analysis. RESULTS: A total of 19 studies were included, including 6151 children and adolescents. The pooled prevalence estimate captured by the Developmental Behaviour Checklist was 38% (95% confidence interval = [31, 46]), contrasting with 49% (95% confidence interval = [46, 51]) captured by the Child Behaviour Checklist; both rates were higher than a non-intellectual disability population. Severity of intellectual disability did not significantly influence the Developmental Behaviour Checklist risks. Insufficient data were available to conduct statistical analyses on the effects of age, gender and socioeconomic status. Of diagnosed psychiatric disorders, attention deficit/hyperactivity disorder (30%), conduct disorder (3-21%) and anxiety disorders (7-34%) were the most prevalent conditions. CONCLUSION: This review consists of the largest sample hitherto evaluated. In the intellectual disability population, mental health comorbidities could be better detected by a symptom phenotype than a psychiatric diagnostic phenotype. Crucially, future research needs to address the effect of measurement validity in the intellectual disability population. Estimated prevalence rates were high compared to the general population, indicating the importance of systematic screening, case detection and appropriate management.


Assuntos
Deficiência Intelectual , Adolescente , Adulto , Transtornos de Ansiedade , Criança , Comorbidade , Humanos , Deficiência Intelectual/epidemiologia , Saúde Mental , Prevalência , Adulto Jovem
3.
J Vasc Surg ; 72(3): 790-798, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32497747

RESUMO

The global SARS-CoV-2/COVID-19 pandemic has required a reduction in nonemergency treatment for a variety of disorders. This report summarizes conclusions of an international multidisciplinary consensus group assembled to address evaluation and treatment of patients with thoracic outlet syndrome (TOS), a group of conditions characterized by extrinsic compression of the neurovascular structures serving the upper extremity. The following recommendations were developed in relation to the three defined types of TOS (neurogenic, venous, and arterial) and three phases of pandemic response (preparatory, urgent with limited resources, and emergency with complete diversion of resources). • In-person evaluation and treatment for neurogenic TOS (interventional or surgical) are generally postponed during all pandemic phases, with telephone/telemedicine visits and at-home physical therapy exercises recommended when feasible. • Venous TOS presenting with acute upper extremity deep venous thrombosis (Paget-Schroetter syndrome) is managed primarily with anticoagulation, with percutaneous interventions for venous TOS (thrombolysis) considered in early phases (I and II) and surgical treatment delayed until pandemic conditions resolve. Catheter-based interventions may also be considered for selected patients with central subclavian vein obstruction and threatened hemodialysis access in all pandemic phases, with definitive surgical treatment postponed. • Evaluation and surgical treatment for arterial TOS should be reserved for limb-threatening situations, such as acute upper extremity ischemia or acute digital embolization, in all phases of pandemic response. In late pandemic phases, surgery should be restricted to thrombolysis or brachial artery thromboembolectomy, with more definitive treatment delayed until pandemic conditions resolve.


Assuntos
Betacoronavirus/patogenicidade , Infecções por Coronavirus/prevenção & controle , Pandemias/prevenção & controle , Pneumonia Viral/prevenção & controle , Guias de Prática Clínica como Assunto , Síndrome do Desfiladeiro Torácico/diagnóstico , Triagem/normas , COVID-19 , Consenso , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/transmissão , Infecções por Coronavirus/virologia , Descompressão Cirúrgica/normas , Procedimentos Cirúrgicos Eletivos/métodos , Procedimentos Cirúrgicos Eletivos/normas , Tratamento de Emergência/métodos , Tratamento de Emergência/normas , Humanos , Controle de Infecções/normas , Comunicação Interdisciplinar , Salvamento de Membro/métodos , Salvamento de Membro/normas , Seleção de Pacientes , Pneumonia Viral/epidemiologia , Pneumonia Viral/transmissão , Pneumonia Viral/virologia , SARS-CoV-2 , Telemedicina/normas , Síndrome do Desfiladeiro Torácico/etiologia , Síndrome do Desfiladeiro Torácico/terapia , Terapia Trombolítica/métodos , Terapia Trombolítica/normas , Tempo para o Tratamento/normas
5.
Sci Rep ; 9(1): 20153, 2019 12 27.
Artigo em Inglês | MEDLINE | ID: mdl-31882779

RESUMO

Shelf seas play an important role in the global carbon cycle, absorbing atmospheric carbon dioxide (CO2) and exporting carbon (C) to the open ocean and sediments. The magnitude of these processes is poorly constrained, because observations are typically interpolated over multiple years. Here, we used 298500 observations of CO2 fugacity (fCO2) from a single year (2015), to estimate the net influx of atmospheric CO2 as 26.2 ± 4.7 Tg C yr-1 over the open NW European shelf. CO2 influx from the atmosphere was dominated by influx during winter as a consequence of high winds, despite a smaller, thermally-driven, air-sea fCO2 gradient compared to the larger, biologically-driven summer gradient. In order to understand this climate regulation service, we constructed a carbon-budget supplemented by data from the literature, where the NW European shelf is treated as a box with carbon entering and leaving the box. This budget showed that net C-burial was a small sink of 1.3 ± 3.1 Tg C yr-1, while CO2 efflux from estuaries to the atmosphere, removed the majority of river C-inputs. In contrast, the input from the Baltic Sea likely contributes to net export via the continental shelf pump and advection (34.4 ± 6.0 Tg C yr-1).

6.
Sci Data ; 6(1): 22, 2019 04 09.
Artigo em Inglês | MEDLINE | ID: mdl-30967554

RESUMO

Through regular sampling surveys, the Flanders Marine Institute is generating long term data series for the Belgian coastal water and sand bank systems, a designated site in the Long Term Ecological Research (LTER) network. The data series is built on sampling activities initiated in 2002, but gradually upgraded and extended in the framework of the LifeWatch marine observatory and the Integrated Carbon Observation System (ICOS) participation. Nine nearshore stations are sampled monthly, with additional seasonal sampling of eight offshore stations. This paper presents the generated data series for nutrients, pigments, suspended matter and turbidity. The collection, methodology and processing of the 2002-2018 dataset is described, along with its data curation, integration and quality control. Yearly versions of the data are published online in a standardized format, accompanied with extensive metadata description and labelled with digital identifiers for traceability. Data is published under a CC-BY license, allowing use of the data under the condition of providing reference to the original source.

7.
J Vasc Surg Cases Innov Tech ; 4(2): 163-165, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29942911

RESUMO

A patient with neurogenic thoracic outlet syndrome was initially treated with scalenectomy, first rib resection, and wrapping of the brachial plexus (BP) with amnion membrane (AM) to prevent postoperative adhesions. Twelve months later, at reoperation for recurrent symptoms, the AM was observed to be intact. The BP had no scar tissue around it. Recurrence was due to scarring around the nerve roots superior to the portion of the plexus that had been wrapped with AM. It was concluded that the AM had successfully protected the portion of the BP that had been wrapped. Longer term studies are in progress.

8.
Sci Total Environ ; 630: 630-647, 2018 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-29494972

RESUMO

The flow of terrestrial carbon to rivers and inland waters is a major term in the global carbon cycle. The organic fraction of this flux may be buried, remineralized or ultimately stored in the deep ocean. The latter can only occur if terrestrial organic carbon can pass through the coastal and estuarine filter, a process of unknown efficiency. Here, data are presented on the spatial distribution of terrestrial fluorescent and chromophoric dissolved organic matter (FDOM and CDOM, respectively) throughout the North Sea, which receives organic matter from multiple distinct sources. We use FDOM and CDOM as proxies for terrestrial dissolved organic matter (tDOM) to test the hypothesis that tDOM is quantitatively transferred through the North Sea to the open North Atlantic Ocean. Excitation emission matrix fluorescence and parallel factor analysis (EEM-PARAFAC) revealed a single terrestrial humic-like class of compounds whose distribution was restricted to the coastal margins and, via an inverse salinity relationship, to major riverine inputs. Two distinct sources of fluorescent humic-like material were observed associated with the combined outflows of the Rhine, Weser and Elbe rivers in the south-eastern North Sea and the Baltic Sea outflow to the eastern central North Sea. The flux of tDOM from the North Sea to the Atlantic Ocean appears insignificant, although tDOM export may occur through Norwegian coastal waters unsampled in our study. Our analysis suggests that the bulk of tDOM exported from the Northwest European and Scandinavian landmasses is buried or remineralized internally, with potential losses to the atmosphere. This interpretation implies that the residence time in estuarine and coastal systems exerts an important control over the fate of tDOM and needs to be considered when evaluating the role of terrestrial carbon losses in the global carbon cycle.

9.
Diagnostics (Basel) ; 7(3)2017 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-28788065

RESUMO

The diagnosis of brachial plexus compression-either neurogenic thoracic outlet syndrome (NTOS) or neurogenic pectoralis minor syndrome (NPMS)-is based on old fashioned history and physical examination. Tests, such as scalene muscle and pectoralis minor muscle blocks are employed to confirm a diagnosis suspected on clinical findings. Electrodiagnostic studies can confirm a diagnosis of nerve compression, but cannot establish it. This is not a diagnosis of exclusion; the differential and associated diagnoses of upper extremity pain are always considered. Also discussed is conservative and surgical treatment options.

10.
J Vasc Surg ; 64(3): 797-802, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27565596

RESUMO

Thoracic outlet syndrome (TOS) is a group of disorders all having in common compression at the thoracic outlet. Three structures are at risk: the brachial plexus, the subclavian vein, and the subclavian artery, producing neurogenic (NTOS), venous (VTOS), and arterial (ATOS) thoracic outlet syndromes, respectively. Each of these three are separate entities, though they can coexist and possibly overlap. The treatment of NTOS, in particular, has been hampered by lack of data, which in turn is the result of inconsistent definitions and diagnosis, uncertainty with regard to treatment options, and lack of consistent outcome measures. The Committee has defined NTOS as being present when three of the following four criteria are present: signs and symptoms of pathology occurring at the thoracic outlet (pain and/or tenderness), signs and symptoms of nerve compression (distal neurologic changes, often worse with arms overhead or dangling), absence of other pathology potentially explaining the symptoms, and a positive response to a properly performed scalene muscle test injection. Reporting standards for workup, treatment, and assessment of results are presented, as are reporting standards for all phases of VTOS and ATOS. The overall goal is to produce consistency in diagnosis, description of treatment, and assessment of results, in turn then allowing more valuable data to be presented.


Assuntos
Medicina Baseada em Evidências/normas , Projetos de Pesquisa/normas , Terminologia como Assunto , Síndrome do Desfiladeiro Torácico , Consenso , Humanos , Valor Preditivo dos Testes , Prognóstico , Síndrome do Desfiladeiro Torácico/classificação , Síndrome do Desfiladeiro Torácico/complicações , Síndrome do Desfiladeiro Torácico/diagnóstico , Síndrome do Desfiladeiro Torácico/terapia
11.
J Vasc Surg ; 64(3): e23-35, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27565607

RESUMO

Thoracic outlet syndrome (TOS) is a group of disorders all having in common compression at the thoracic outlet. Three structures are at risk: the brachial plexus, the subclavian vein, and the subclavian artery, producing neurogenic (NTOS), venous (VTOS), and arterial (ATOS) thoracic outlet syndromes, respectively. Each of these three are separate entities, though they can coexist and possibly overlap. The treatment of NTOS, in particular, has been hampered by lack of data, which in turn is the result of inconsistent definitions and diagnosis, uncertainty with regard to treatment options, and lack of consistent outcome measures. The Committee has defined NTOS as being present when three of the following four criteria are present: signs and symptoms of pathology occurring at the thoracic outlet (pain and/or tenderness), signs and symptoms of nerve compression (distal neurologic changes, often worse with arms overhead or dangling), absence of other pathology potentially explaining the symptoms, and a positive response to a properly performed scalene muscle test injection. Reporting standards for workup, treatment, and assessment of results are presented, as are reporting standards for all phases of VTOS and ATOS. The overall goal is to produce consistency in diagnosis, description of treatment, and assessment of results, in turn then allowing more valuable data to be presented.


Assuntos
Medicina Baseada em Evidências/normas , Projetos de Pesquisa/normas , Terminologia como Assunto , Síndrome do Desfiladeiro Torácico , Consenso , Humanos , Valor Preditivo dos Testes , Prognóstico , Síndrome do Desfiladeiro Torácico/classificação , Síndrome do Desfiladeiro Torácico/complicações , Síndrome do Desfiladeiro Torácico/diagnóstico , Síndrome do Desfiladeiro Torácico/terapia
12.
Telemed J E Health ; 21(5): 374-81, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25671795

RESUMO

BACKGROUND: One of the major barriers to the practice of telemedicine is the state-to-state inconsistency and variability of requirements for physicians to obtain a medical license. MATERIALS AND METHODS: Invitations were extended to 61 individuals, representing 21 companies and healthcare systems. The participants had to meet strict inclusion criteria. Health professionals who process well over 1,000 applicants a year were provided a 30-question survey asking about state medical boards and their assessment, including ease of obtaining a license as well as difficulties. RESULTS: Responses were received from 40 of 61 (66%) individuals. Responders ranked their expectations of state medical boards for the following qualities: responsiveness to questions, cooperation, willingness to expedite the application, and knowledge. Although 46% of respondents perceived the state medical board licensing to be reasonable, 54% reported a prolonged application process owing to variable requirements and a deficiency of board office assistance. When respondents were asked about difficulty in dealing with the state medical boards, the reasons listed included the following: failure to respond to e-mails or calls, failure to provide updates on missing content, lack of cooperation, lack of uniform process/consistency, provision of erroneous information, and failure to use the Federation Credentials Verification Service. Lost documents was a problem in that 79% had to resubmit documents that were lost. CONCLUSIONS: The rapid growth of telemedicine is consistently meeting resistance because of the timely, costly, and variable process of medical license portability. A survey of professionals who, combined, annually process over 1,000 applications revealed major disparities among states. The survey demonstrated delayed responsiveness by the medical board, lost documents, and lack of access online as to the current applicant's status. Many of the respondents felt a standardized process or even a national license was a viable solution. Several models for a solution are presented.


Assuntos
Licenciamento em Medicina/legislação & jurisprudência , Conselhos de Especialidade Profissional/normas , Inquéritos e Questionários , Telemedicina/legislação & jurisprudência , Feminino , Humanos , Licenciamento em Medicina/estatística & dados numéricos , Masculino , Avaliação das Necessidades , Estados Unidos
13.
Am J Vet Res ; 76(3): 246-52, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25710761

RESUMO

OBJECTIVE: To determine whether exercise on alternative terrain affects the development of the digital cushion and bony structures of the bovine foot. ANIMALS: 20 weaned bull calves. PROCEDURES: Two-month-old calves were randomly allocated to an exercise or control group. For 4 months, the control group was maintained in grass paddocks, and the exercise group was maintained in a 0.8-km lane with a mixed terrain of dirt, stones (0.32- to 0.95-cm pea gravel and 5-cm crusher run), and grass. Water and food for the exercise group were located at opposite ends of the lane; calves were fed twice daily, which ensured they walked 3.2 km/d. Pedometers were applied to all calves to measure distance traveled. All calves were slaughtered at 6 months of age. The right forefeet and hind feet were harvested for MRI and CT evaluation. RESULTS: Control calves walked a mean of 1.1 km daily, whereas the exercised calves walked a mean of 3.2 km daily. Mean digital cushion volume and surface area were 25,335 mm(3) and 15,647 mm(2), respectively, for the exercised calves and 17,026 mm(3) and 12,745 mm(2), respectively, for the control calves. When weight was controlled, mean digital cushion volume and surface area for the exercise group were increased by 37.10% and 18.25%, respectively, from those for the control group. CONCLUSIONS AND CLINICAL RELEVANCE: Results indicated that exercise on alternative terrain increased the volume and surface area of the digital cushion of the feet of dairy calves, which should make them less susceptible to lameness.


Assuntos
Criação de Animais Domésticos , Bovinos/crescimento & desenvolvimento , Meio Ambiente , Casco e Garras/crescimento & desenvolvimento , Condicionamento Físico Animal , Animais , Animais Recém-Nascidos , Peso Corporal , Bovinos/anatomia & histologia , Casco e Garras/anatomia & histologia , Masculino , Desmame
14.
Proc Natl Acad Sci U S A ; 112(4): 1089-94, 2015 Jan 27.
Artigo em Inglês | MEDLINE | ID: mdl-25561526

RESUMO

The biological carbon pump, which transports particulate organic carbon (POC) from the surface to the deep ocean, plays an important role in regulating atmospheric carbon dioxide (CO2) concentrations. We know very little about geographical variability in the remineralization depth of this sinking material and less about what controls such variability. Here we present previously unpublished profiles of mesopelagic POC flux derived from neutrally buoyant sediment traps deployed in the North Atlantic, from which we calculate the remineralization length scale for each site. Combining these results with corresponding data from the North Pacific, we show that the observed variability in attenuation of vertical POC flux can largely be explained by temperature, with shallower remineralization occurring in warmer waters. This is seemingly inconsistent with conclusions drawn from earlier analyses of deep-sea sediment trap and export flux data, which suggest lowest transfer efficiency at high latitudes. However, the two patterns can be reconciled by considering relatively intense remineralization of a labile fraction of material in warm waters, followed by efficient downward transfer of the remaining refractory fraction, while in cold environments, a larger labile fraction undergoes slower remineralization that continues over a longer length scale. Based on the observed relationship, future increases in ocean temperature will likely lead to shallower remineralization of POC and hence reduced storage of CO2 by the ocean.

15.
J Vasc Surg ; 61(3): 821-5, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25600336

RESUMO

The supraclavicular approach to scalenectomy and first rib resection has been modified since the original description in 1985. The incision is 1 to 2 cm above the clavicle, 1 cm lateral to the midline, and 5 to 7 cm long. Subplatysmal skin flaps are created. The sternocleidomastoid muscle is mobilized on its lateral edge and retracted but not divided. The scalene fat pad is split vertically, the omohyoid muscle excised, and the C5 nerve root dissected free. The accessory phrenic nerve is identified, if present, arising medially from C5, and preserved. The rest of the plexus is dissected free, muscular and connective tissue removed from all nerve roots and trunks, and the subclavian artery identified. The phrenic nerve is identified on the medial edge of the anterior scalene muscle (ASM). The ASM is divided on the first rib. The ASM is elevated, freed, and divided as high as possible and free of C5. The middle scalene muscle is dissected. C5 and C6 branches of the long thoracic nerve are identified and protected as the portion of middle scalene muscle adjacent to the nerves of the plexus is excised. The decision on whether the first rib is to be removed is determined by whether the lower trunk of the plexus is touching the first rib. If the rib is removed, its posterior end is freed, divided, and 1 cm excised. The rest of the rib is freed from the intercostal muscles with a periosteal elevator or harmonic scalpel, the pleura is separated from the inner surface of the rib, and the anterior end divided with an infraclavicular rib cutter. The operation has been made safer by identifying and dissecting the C5 nerve root before looking for the phrenic nerve.


Assuntos
Plexo Braquial/fisiopatologia , Clavícula/inervação , Descompressão Cirúrgica/métodos , Osteotomia/métodos , Costelas/cirurgia , Síndrome do Desfiladeiro Torácico/cirurgia , Pontos de Referência Anatômicos , Descompressão Cirúrgica/efeitos adversos , Dissecação , Humanos , Posicionamento do Paciente , Radiografia , Recidiva , Reoperação , Costelas/diagnóstico por imagem , Retalhos Cirúrgicos , Síndrome do Desfiladeiro Torácico/diagnóstico , Síndrome do Desfiladeiro Torácico/fisiopatologia , Resultado do Tratamento
16.
Ann N Y Acad Sci ; 1329: 1-17, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25308791

RESUMO

Implantable cardioverter-defibrillators (ICDs) detect ventricular arrhythmias responsible for causing sudden cardiac arrest and then deliver a high-voltage defibrillation shock to terminate the arrhythmia and restore normal cardiac function. Conventional transveneous ICD (TV-ICD) systems require one or more leads to be implanted into the heart through the venous anatomy. While TV-ICDs are well tolerated by most patients, the invasive approach can be associated with severe complications, including systemic infection, cardiac injuries, and lead failures. An entirely subcutaneous ICD (S-ICD) system was developed as a less invasive alternative to TV-ICDs without requiring leads in or on the heart. The S-ICD system provides therapy with a left lateral pulse generator and parasternal electrode configuration that is placed under the skin outside the rib cage, resulting in a much lower risk profile. Advances in defibrillation research and far-field sensing combined to enable development of the commercial S-ICD system. An investigation device exemption (IDE) clinical investigation followed, with FDA approval in September 2012. Evaluation of the long-term performance of the S-ICD system continues, with two independent postmarket registries and a prospective randomized head-to-head trial versus the transvenous ICD.


Assuntos
Morte Súbita Cardíaca/prevenção & controle , Desfibriladores Implantáveis/tendências , Desenho de Equipamento/tendências , Tela Subcutânea , Taquicardia Ventricular/terapia , Ensaios Clínicos como Assunto/instrumentação , Ensaios Clínicos como Assunto/tendências , Morte Súbita Cardíaca/epidemiologia , Desenho de Equipamento/instrumentação , Humanos , Taquicardia Ventricular/mortalidade , Taquicardia Ventricular/fisiopatologia
17.
Bioessays ; 36(12): 1132-7, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25220362

RESUMO

Sinking organic particles transfer ∼10 gigatonnes of carbon into the deep ocean each year, keeping the atmospheric CO2 concentration significantly lower than would otherwise be the case. The exact size of this effect is strongly influenced by biological activity in the ocean's twilight zone (∼50-1,000 m beneath the surface). Recent work suggests that the resident zooplankton fragment, rather than ingest, the majority of encountered organic particles, thereby stimulating bacterial proliferation and the deep-ocean microbial food web. Here we speculate that this apparently counterintuitive behaviour is an example of 'microbial gardening', a strategy that exploits the enzymatic and biosynthetic capabilities of microorganisms to facilitate the 'gardener's' access to a suite of otherwise unavailable compounds that are essential for metazoan life. We demonstrate the potential gains that zooplankton stand to make from microbial gardening using a simple steady state model, and we suggest avenues for future research.


Assuntos
Dióxido de Carbono/química , Cilióforos/fisiologia , Cadeia Alimentar , Microbiologia da Água , Zooplâncton/fisiologia , Animais , Biomassa , Ciclo do Carbono , Dióxido de Carbono/metabolismo , Comportamento Alimentar/fisiologia , Consórcios Microbianos/fisiologia , Oceanos e Mares
18.
Nature ; 507(7493): 480-3, 2014 Mar 27.
Artigo em Inglês | MEDLINE | ID: mdl-24670767

RESUMO

Photosynthesis in the surface ocean produces approximately 100 gigatonnes of organic carbon per year, of which 5 to 15 per cent is exported to the deep ocean. The rate at which the sinking carbon is converted into carbon dioxide by heterotrophic organisms at depth is important in controlling oceanic carbon storage. It remains uncertain, however, to what extent surface ocean carbon supply meets the demand of water-column biota; the discrepancy between known carbon sources and sinks is as much as two orders of magnitude. Here we present field measurements, respiration rate estimates and a steady-state model that allow us to balance carbon sources and sinks to within observational uncertainties at the Porcupine Abyssal Plain site in the eastern North Atlantic Ocean. We find that prokaryotes are responsible for 70 to 92 per cent of the estimated remineralization in the twilight zone (depths of 50 to 1,000 metres) despite the fact that much of the organic carbon is exported in the form of large, fast-sinking particles accessible to larger zooplankton. We suggest that this occurs because zooplankton fragment and ingest half of the fast-sinking particles, of which more than 30 per cent may be released as suspended and slowly sinking matter, stimulating the deep-ocean microbial loop. The synergy between microbes and zooplankton in the twilight zone is important to our understanding of the processes controlling the oceanic carbon sink.


Assuntos
Organismos Aquáticos/metabolismo , Ciclo do Carbono , Carbono/metabolismo , Água do Mar , Animais , Oceano Atlântico , Biota , Dióxido de Carbono/metabolismo , Sequestro de Carbono , Respiração Celular , Cadeia Alimentar , Observação , Água do Mar/química , Água do Mar/microbiologia , Incerteza , Zooplâncton/metabolismo
19.
Telemed J E Health ; 20(10): 902-8, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24660844

RESUMO

BACKGROUND: A critical shortage in the supply of physicians in the United States has necessitated innovative approaches to physician service delivery. Telemedicine is a viable service delivery model for a variety of physician and health services. Telemedicine is most effective when applied where physician resources are scarce, patient care is time sensitive, and service volume may be distributed across a network. Shortages in critical care and neurology specialists have led to the use of tele-intensive care unit and telestroke services in hospital settings. These hospital-based telemedicine services have gained acceptance and recommendation. Hospitalist staffing shortages may provide an opportunity to apply similar telemedicine models to hospitalist medicine. This study assesses the potential market for a nighttime telehospitalist service. MATERIALS AND METHODS: An analysis of the Florida state hospital discharge dataset investigated the potential market for a new nighttime telehospitalist service. Admissions were filtered and stratified for common hospitalist metrics, time of day, and age of patients. Admissions were further expressed by hour of day and location. RESULTS: Nineteen percent of common hospitalist admissions occurred between 7:00 p.m. and 7:00 a.m., with a range of 17%-27% or 0.23-10.09 admissions per night per facility. Eighty percent of admissions occurred prior to midnight. Nonrural facilities averaged 6.69 hospitalist admissions per night, whereas rural facilities averaged 1.35 admissions per night. CONCLUSIONS: The low volume of nighttime admissions indicates an opportunity to leverage a telehospitalist physician service to deliver inpatient medical admission services across a network. Lower volumes of nighttime admissions in rural facilities may indicate a market for telehospitalist solutions to address the dilemma of hospitalist staffing shortages.


Assuntos
Médicos Hospitalares , Assistência Noturna , Telemedicina , Florida , Humanos , Admissão do Paciente/estatística & dados numéricos , Alta do Paciente/estatística & dados numéricos , Recursos Humanos
20.
Menopause ; 21(9): 924-32, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24473530

RESUMO

OBJECTIVE: This study aims to estimate the risk of hot flashes relative to natural menopause and to evaluate the associations of hormone levels, behavioral variables, and demographic variables with the risk of hot flashes after menopause. METHODS: We performed annual assessment of 255 women who were premenopausal at baseline and reached natural menopause within 16 years of follow-up. RESULTS: The prevalence of moderate/severe hot flashes increased in each premenopausal year, reaching a peak of 46% in the first 2 years after the final menstrual period (FMP). Hot flashes decreased slowly after menopause and did not return to premenopausal levels until 9 years after the FMP. The mean (SD) duration of moderate/severe hot flashes after the FMP was 4.6 (2.9) years (for any hot flashes, 4.9 [3.1] y). One third of women at 10 years or more after menopause continued to experience moderate/severe hot flashes. African-American women (obese and nonobese) and obese white women had significantly greater risks of hot flashes compared with nonobese white women (interaction, P = 0.01). In multivariable analysis, increasing follicle-stimulating hormone levels before the FMP (P < 0.001), decreasing estradiol (odds ratio, 0.87; 95% CI, 0.78-0.96; P = 0.008), and increasing anxiety (odds ratio, 1.05; 95% CI, 1.03-1.06; P < 0.001) were significant risk factors for hot flashes, whereas higher education levels were protective (odds ratio, 0.66; 95% CI, 0.47-0.91; P = 0.011). CONCLUSIONS: Moderate/severe hot flashes continue, on average, for nearly 5 years after menopause; more than one third of women observed for 10 years or more after menopause have moderate/severe hot flashes. Continuation of hot flashes for more than 5 years after menopause underscores the importance of determining individual risks/benefits when selecting hormone or nonhormone therapy for menopausal symptoms.


Assuntos
Fogachos/epidemiologia , Menopausa , Adulto , Envelhecimento , Atitude Frente a Saúde , Estudos de Coortes , Feminino , Fogachos/etiologia , Fogachos/patologia , Humanos , Estudos Longitudinais , Pennsylvania/epidemiologia , Prevalência , Fatores de Risco , Índice de Gravidade de Doença
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