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1.
Oecologia ; 193(2): 377-388, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32533359

RESUMO

Rapidly increasing urbanisation requires mitigation against associated losses of biodiversity and species abundance. In urban-breeding birds, altered food availability for nestlings is thought to reduce reproductive success compared to forest populations. To compensate for shortages of preferred foods, urban parents could increase their search effort for optimal diets or provision other foods. Here, we used telemetry and faecal metabarcoding on blue tits from one urban and one forest populations to compare parental effort and comprehensively describe nestling diet. Urban parents travelled on average 30% further than those in the forest, likely to offset limited availability of high-quality nestling food (i.e. caterpillars) in cities. Metabarcoding, based on a mean number of 30 identified taxa per faeces, revealed that the diets of urban chicks were nonetheless substantially shifted to include alternative foods. While in the forest caterpillars comprised 82 ± 11% of taxa provisioned to nestlings, in the city they constituted just 44 ± 10%. Pre-fledging chick mass as well as offspring numbers were lower in urban than in forest-reared broods. Thus, at least in our comparison of two sites, the hard labour of urban parents did not fully pay off, suggesting that improved habitat management is required to support urban-breeding birds.


Assuntos
Aves Canoras , Animais , Cidades , Dieta , Frutas , Telemetria
2.
Curr Allergy Asthma Rep ; 20(8): 36, 2020 06 06.
Artigo em Inglês | MEDLINE | ID: mdl-32506184

RESUMO

PURPOSE OF REVIEW: Our day-to-day life is saturated with health data that was previously out of reach. Over the last decade, new devices and fitness technology companies are attempting to tap into this data, uncovering a treasure trove of useful information that, when applied correctly, has the potential to revolutionize the way we approach healthcare and chronic conditions like asthma, especially in the wake of the COVID-19 pandemic. RECENT FINDINGS: By harnessing exciting developments in personalization, digitization, wellness, and patient engagement, care providers can improve health outcomes for our patients in a way we have never been able to do in the past. While new technologies to capture individual health metrics are everywhere, how can we use this information to make a real difference in our patients' lives? Navigating the complicated landscape of personal wearable devices, asthma inhaler sensors, and exercise apps can be daunting to even the most tech savvy physician. This manuscript will give you the tools necessary to make lasting changes in your patients' lives by exposing them to a world of usable, affordable, and relatable health technology that resonates with their personal fitness and wellness goals. These tools will be even more important post-COVID-19, as the landscape of clinical outpatient care changes from mainly in-person visits to a greater reliance on telemedicine and remote monitoring.


Assuntos
Telemedicina , Telemetria , Dispositivos Eletrônicos Vestíveis , Asma/diagnóstico , Asma/terapia , Betacoronavirus , Doença Crônica/terapia , Infecções por Coronavirus/diagnóstico , Infecções por Coronavirus/terapia , Promoção da Saúde , Humanos , Pandemias , Pneumonia Viral/diagnóstico , Pneumonia Viral/terapia , Medicina de Precisão , Saúde Pública
3.
Rev Bras Parasitol Vet ; 29(1): e022419, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32236336

RESUMO

This study aimed to evaluate the occurrence of diseases transmitted by Amblyomma ovale in 61 dogs monitored for three years through collections of ticks and blood, interviews, telemetry and camera traps in three areas of Serra do Mar State Park, Brazil. Blood samples were used to investigate infection by Rangelia vitalii by real-time TaqMan PCR and Rickettsia parkeri by IIFA. The collected ticks were submitted to conventional PCR to investigate the presence of R. parkeri . These data were compared with the monitoring results and interviews with the owners. Dogs considered as companion presented a risk of infection by R. parkeri strain Mata Atlantica 5.4 times higher than those not considered as companion (p = 0.009). Dogs that had at least one A. ovale collected during the campaigns had a 10 times higher risk of infection by R. parkeri strain Mata Atlantica than those who did not (p = 0.009). One dog positive for R. vitalii by real-time TaqMan PCR was parasitized by A. ovale frequently during monitoring. Sequenced ompaA - positive DNA samples had 100% identity of R. parkeri strain Mata Atlantica clone As106. From the findings, it is urgent to control domestic dogs around rainforests to reduce zoonoses transmission.


Assuntos
Doenças do Cão/epidemiologia , Ixodidae/microbiologia , Infecções por Rickettsia/veterinária , Rickettsia/isolamento & purificação , Animais , Brasil/epidemiologia , DNA Bacteriano/análise , Doenças do Cão/diagnóstico , Doenças do Cão/microbiologia , Cães , Técnica Indireta de Fluorescência para Anticorpo , Reação em Cadeia da Polimerase , Floresta Úmida , Rickettsia/classificação , Rickettsia/genética , Infecções por Rickettsia/diagnóstico , Infecções por Rickettsia/epidemiologia , Análise de Sequência de DNA , Telemetria
4.
PLoS One ; 15(3): e0230100, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32210429

RESUMO

Significant effort has been invested in downsizing telemetry transmitters so they can be used to monitor survival and behavior in a variety of fish species and life stages. Commercially available "micro" transmitters in particular have presented researchers with the opportunity to tag very small fish (< 250 mm fork length). We conducted a release/recapture study in tandem with a laboratory study of tag effects on juvenile yearling spring and subyearling fall Chinook salmon (Oncorhynchus tshawytscha). Fish surgically implanted with both a micro-acoustic transmitter and passive integrated transponder (PIT) tags were compared with fish injected with only a PIT tag. Detections from both tag types showed that during the downstream migration, fish surgically implanted with both a micro-acoustic transmitter and PIT tag did not survive at the same rate or behave in the same manner as those injected with only a PIT tag. Differences in survival were more pronounced in subyearlings than in yearlings. This was likely due to warmer temperatures experienced by migrating subyearlings, their higher metabolic rate, and their smaller size and consequently higher tag-burden. To identify the mechanisms driving these differences, we necropsied migrating study fish recaptured at locations 225-460 km downstream from the release site. Results revealed that compared with PIT-tagged fish, micro-acoustic-tagged fish had heightened inflammatory responses within the body cavity, delayed healing of surgical incision sites, and poor body-condition. For study fish tagged along with those released to the river but held in the laboratory for observation, outcomes revealed that tag effects were similar in direction, but not as pronounced under artificial conditions.


Assuntos
Sistemas de Identificação Animal , Migração Animal , Salmão/fisiologia , Telemetria/veterinária , Animais , Rios , Telemetria/instrumentação
6.
Nat Commun ; 11(1): 789, 2020 02 07.
Artigo em Inglês | MEDLINE | ID: mdl-32034157

RESUMO

Place cells are spatially modulated neurons found in the hippocampus that underlie spatial memory and navigation: how these neurons represent 3D space is crucial for a full understanding of spatial cognition. We wirelessly recorded place cells in rats as they explored a cubic lattice climbing frame which could be aligned or tilted with respect to gravity. Place cells represented the entire volume of the mazes: their activity tended to be aligned with the maze axes, and when it was more difficult for the animals to move vertically the cells represented space less accurately and less stably. These results demonstrate that even surface-dwelling animals represent 3D space and suggests there is a fundamental relationship between environment structure, gravity, movement and spatial memory.


Assuntos
Células de Lugar/fisiologia , Percepção Espacial/fisiologia , Memória Espacial/fisiologia , Animais , Gravitação , Aprendizagem em Labirinto , Ratos , Telemetria/métodos
7.
Invest Ophthalmol Vis Sci ; 61(2): 37, 2020 02 07.
Artigo em Inglês | MEDLINE | ID: mdl-32097479

RESUMO

Purpose: Recent retrospective clinical studies and animal experiments have suggested that cerebrospinal fluid pressure (CSFP) is important in glaucoma pathogenesis. Intraocular pressure (IOP) and CSFP are the driving components of the translaminar pressure (TLP), which directly effects the optic nerve head. This study measured the diurnal cycle of TLP using continuous wireless telemetry in nonhuman primates (NHPs), a common animal model of glaucoma. Methods: We have developed an implantable wireless telemetry system based on a small piezoelectric pressure transducer with low drift. Unilateral IOP was measured in the anterior chamber of the eye, and intracranial pressure (ICP, a surrogate measure of CSFP) was measured in the brain parenchyma in four awake, behaving NHPs for periods of 22 to 281 days. IOP and ICP telemetry transducers were calibrated with direct pressure measurements in the eye (every 2 weeks) and brain (monthly). TLP was quantified in real time as IOP-ICP, and hourly means of IOP, ICP, and TLP were analyzed. Results: Results show that mean ICP is significantly higher by an average of 4.8 ± 0.8 mmHg during sleeping hours in NHPs (P < 0.01). IOP showed a small but significant nocturnal elevation in two of four animals despite NHPs sleeping upright (P < 0.05). TLP was significantly lower during sleep (7.1 ± 0.6 mmHg; P < 0.01) than when the animals were awake and active (11.0 ± 0.9 mmHg), driven primarily by the large increase in ICP during sleep. Conclusions: The 56% increase in TLP during waking hours in NHPs matches the increase in TLP due to postural change from supine to upright reported previously in humans.


Assuntos
Câmara Anterior/fisiologia , Ritmo Circadiano/fisiologia , Glaucoma/fisiopatologia , Pressão Intracraniana/fisiologia , Pressão Intraocular/fisiologia , Animais , Macaca mulatta , Masculino , Estudos Retrospectivos , Telemetria/métodos
9.
PLoS One ; 15(1): e0227272, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31914159

RESUMO

Thorough preoperative planning in total knee arthroplasty is essential to reduce implant failure by proper implant sizing and alignment. The "gold standard" in conventional preoperative planning is based on anterior-posterior long-leg radiographs. However, the coronal component alignment is still an open discussion in literature, since studies have reported contradictory outcomes on survivorship, indicating that optimal individual alignment goals still need to be defined. Two-dimensional biomechanical models of the knee have the potential to predict joint forces and, therefore, objectify therapy planning. Previously published two-dimensional biomechanical models were evaluated and validated for the first time in this study by comparison of model predictions to corresponding in vivo measurements obtained from telemetric implants for a one- and two-leg stance. Model input parameters were acquired from weight-bearing anterior-posterior long-leg radiographs and statistical assumptions for patient-specific model adaptation. The overall time from initialization to load prediction was in the range of 7-8 minutes per patient for all models. However, no model could accurately predict the correct trend of knee joint forces over patients. Two dimensional biomechanical models of the knee have the potential to improve preoperative planning in total knee arthroplasty by providing additional individual biomechanical information to the surgeon. Although integration into the clinical workflow might be performed with acceptable costs, the models' accuracy is insufficient for the moment. Future work is needed for model optimization and more sophisticated modelling approaches.


Assuntos
Artroplastia do Joelho/instrumentação , Articulação do Joelho/fisiologia , Prótese do Joelho , Modelos Biológicos , Planejamento de Assistência ao Paciente , Idoso , Fenômenos Biomecânicos , Simulação por Computador , Feminino , Humanos , Articulação do Joelho/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Período Pré-Operatório , Desenho de Prótese/métodos , Radiografia , Telemetria , Suporte de Carga/fisiologia
10.
J Fish Biol ; 96(2): 327-336, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31661157

RESUMO

The year-round thermal habitat at sea for adult Atlantic salmon Salmo salar (n = 49) from northern Norway was investigated using archival tags over a 10 year study period. During their ocean feeding migration, the fish spent 90% of the time in waters with temperatures from 1.6-8.4°C. Daily mean temperatures ranged from -0.5 to 12.9°C, with daily temperature variation up to 9.6°C. Fish experienced the coldest water during winter (November-March) and the greatest thermal range during the first summer at sea (July-August). Trends in sea-surface temperatures influenced the thermal habitat of salmon during late summer and autumn (August-October), with fish experiencing warmer temperatures in warmer years. This pattern was absent during winter (November-March), when daily mean temperatures ranged from 3.4-5.0°C, in both colder and warmer years. The observations of a constant thermal habitat during winter in both warmer and colder years, may suggest that the ocean distribution of salmon is flexible and that individual migration routes could shift as a response to spatiotemporal alterations of favourable prey fields and ocean temperatures.


Assuntos
Migração Animal/fisiologia , Salmo salar , Telemetria , Animais , Ecossistema , Oceanos e Mares , Salmo salar/fisiologia , Estações do Ano , Análise Espaço-Temporal , Telemetria/métodos , Temperatura
11.
J Fish Biol ; 96(2): 539-542, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31823370

RESUMO

Here we present records of sharks obtained using baited remote underwater stereo-video systems (stereo-BRUVS) at two Brazilian oceanic islands. Fourteen of the 60 deployments recorded 19 sharks in Trindade Island. In Saint Peter and Saint Paul Archipelago (SPSPA), two pelagic and two demersal deployments recorded two and one shark, respectively, including the locally extinct Galapagos shark Carcharhinus galapagensis. Stereo-BRUVS should be considered as adjuncts to other non-invasive methods to monitor shark populations.


Assuntos
Tubarões/fisiologia , Animais , Oceano Atlântico , Brasil , Conservação dos Recursos Naturais , Extinção Biológica , Ilhas , Densidade Demográfica , Especificidade da Espécie , Telemetria
12.
Am J Ophthalmol ; 209: 187-196, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31545953

RESUMO

PURPOSE: The aim of this study was to investigate the safety and performance of the second generation of an implantable intraocular pressure (IOP) sensor in patients with primary open angle glaucoma (POAG). DESIGN: prospective, noncomparative, open-label, multicenter clinical investigation. METHODS: In this study, patients with POAG, regularly scheduled for cataract surgery, were implanted with a ring-shaped, sulcus-placed, foldable IOP sensor in a single procedure after intraocular lens implantation. Surgical complications as well as adverse events (AEs) during 12 months of follow-up were recorded. At each follow-up visit, a complete ophthalmic examination, including visual acuity, IOP, slit lamp examination, and dilated funduscopy as well as comparative measurements between Goldmann applanation tonometry and the EYEMATE-IO implant were performed. RESULTS: The EYEMATE-IO implant was successfully implanted in 22 patients with few surgical complications and no unexpected device-related AEs. All ocular AEs resolved quickly under appropriate treatment. Comparative measurements showed good agreement between EYEMATE-IO and Goldmann applanation tonometry (GAT) with an intraclass correlation coefficient (ICC(3,k)) of 0.783 (95% confidence interval [CI]: 0.743, 0.817). EYEMATE-IO measurements were higher than GAT, with a mean difference of 3.2 mm Hg (95% CI: 2.8, 3.5 mm Hg). CONCLUSIONS: The EYEMATE-IO sensor was safely implanted in 22 patients and performed reliably until the end of follow-up. This device allows for continual and long-term measurements of IOP.


Assuntos
Técnicas Biossensoriais/instrumentação , Glaucoma de Ângulo Aberto/diagnóstico , Pressão Intraocular/fisiologia , Telemetria/métodos , Tonometria Ocular/instrumentação , Idoso , Eletrodos Implantados , Desenho de Equipamento , Feminino , Glaucoma de Ângulo Aberto/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Acuidade Visual
13.
Audiol Neurootol ; 24(6): 299-308, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31846976

RESUMO

INTRODUCTION: Precurved cochlear implant (CI) electrode arrays were developed in an attempt to improve the auditory outcome of cochlear implantation, which varies greatly. The recent CI532 (Cochlear Corp., Sydney, Australia) may offer further advantages as its electrode array is thinner than previous precurved CI electrode arrays. The aims here were to investigate 1-year postoperative speech recognition, intraoperative electrically evoked compound action potentials (ECAPs), and their possible relation in patients implanted with a CI532 or its predecessor CI512. METHODS: A retrospective analysis of data from 63 patients subjected to cochlear implantation at the Karolinska University Hospital, Sweden, was performed. Speech recognition of the implanted ear was evaluated using phonemically balanced monosyllabic Swedish words at 65 dB SPL. ECAPs were evaluated using the intraoperative ECAP threshold across ≥8 electrodes generated by the automated neural response telemetry of the CI. RESULTS: The median aided speech recognition score (SRS) 1 year after implantation was 52% (quartile 1 = 40%, quartile 3 = 60%, n = 63) and did not differ statistically significantly between patients with CI512 (n = 38) and CI532 (n = 25). The mean ECAP threshold was 188 CL (current level; SD = 15 CL, n = 54) intraoperatively and did not differ statistically significantly between patients with CI512 (n = 32) and CI532 (n = 22), but the threshold for each electrode varied more between patients with a CI512 (p < 0.0001). A higher mean ECAP threshold was associated with a worse SRS (Spearman's ρ = -0.46, p = 0.0004, n = 54). The association remained among those with a CI512 (Spearman's ρ = -0.62, p = 0.0001, n = 32) when stratified by CI electrode array. CONCLUSION: No statistically significant difference in speech recognition 1 year after cochlear implantation or in mean threshold of ECAP intraoperatively was found between patients with a CI512 and the more recent, slim CI532, but the ECAP thresholds varied more between those with a CI512. A statistically significant association between SRS and mean ECAP threshold was found, but stratified analysis suggests that the association may be true only for patients with a CI512.


Assuntos
Potenciais de Ação/fisiologia , Implante Coclear , Implantes Cocleares , Potenciais Evocados Auditivos/fisiologia , Perda Auditiva Neurossensorial/reabilitação , Percepção da Fala , Adulto , Idoso , Idoso de 80 Anos ou mais , Limiar Auditivo/fisiologia , Eletrodos Implantados , Feminino , Perda Auditiva Neurossensorial/fisiopatologia , Humanos , Período Intraoperatório , Masculino , Pessoa de Meia-Idade , Período Pós-Operatório , Estudos Retrospectivos , Índice de Gravidade de Doença , Telemetria
14.
Sensors (Basel) ; 20(1)2019 Dec 19.
Artigo em Inglês | MEDLINE | ID: mdl-31861539

RESUMO

The coming years may see the advent of distributed implantable devices to support bioelectronic medicinal treatments. Communication between implantable components and between deep implants and the outside world can be challenging. Percutaneous wired connectivity is undesirable and both radiofrequency and optical methods are limited by tissue absorption and power safety limits. As such, there is a significant potential niche for ultrasound communications in this domain. In this paper, we present the design and testing of a reliable and efficient ultrasonic communication telemetry scheme using piezoelectric transducers that operate at 320 kHz frequency. A key challenge results from the multi-propagation path effect. Therefore, we present a method, using short pulse sequences with relaxation intervals. To counter an increasing bit, and thus packet, error rate with distance, we have incorporated an error correction encoding scheme. We then demonstrate how the communication scheme can scale to a network of implantable devices. We demonstrate that we can achieve an effective, error-free, data rate of 0.6 kbps, which is sufficient for low data rate bioelectronic medicine applications. Transmission can be achieved at an energy cost of 642 nJ per bit data packet using on/off power cycling in the electronics.


Assuntos
Telemetria/métodos , Humanos , Próteses e Implantes , Ondas de Rádio , Razão Sinal-Ruído , Telemedicina , Telemetria/instrumentação , Transdutores , Tecnologia sem Fio
15.
IEEE Trans Biomed Circuits Syst ; 13(6): 1783-1791, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31714233

RESUMO

Wireless transmission of voltage signals are particularly useful for sensors embedded inside a closed environment where long-term operation without internal batteries is desirable. For this purpose, voltage tuning resonators can be used, because their voltage-dependent frequency responses can be contactlessly characterized by loop antennas connected to the output and input ports of a network analyzer. However, such passive sensors have limited remote detectability and temporal resolution, especially for smaller frequency shifts that would require repetitive averaging for acceptable measurement accuracy. To overcome these limitations, a double frequency parametric resonator is inductively coupled with a voltage tuning resonator to convert resonance frequency shifts of the passive sensor into frequency encoded oscillation signals that can be instantaneously detected over larger distance separations. This antenna powered FM transmitter has a compact design to achieve good voltage sensitivity and linearity, making it potentially useful for multiple applications from PH sensing to electrophysiological recording.


Assuntos
Oscilometria/instrumentação , Telemetria/instrumentação , Algoritmos , Desenho de Equipamento , Transdutores , Tecnologia sem Fio
16.
BMC Musculoskelet Disord ; 20(1): 546, 2019 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-31731893

RESUMO

BACKGROUND: Wearable sensors are acquiring more and more influence in diagnostic and rehabilitation field to assess motor abilities of people with neurological or musculoskeletal impairments. The aim of this systematic literature review is to analyze the wearable systems for monitoring shoulder kinematics and their applicability in clinical settings and rehabilitation. METHODS: A comprehensive search of PubMed, Medline, Google Scholar and IEEE Xplore was performed and results were included up to July 2019. All studies concerning wearable sensors to assess shoulder kinematics were retrieved. RESULTS: Seventy-three studies were included because they have fulfilled the inclusion criteria. The results showed that magneto and/or inertial sensors are the most used. Wearable sensors measuring upper limb and/or shoulder kinematics have been proposed to be applied in patients with different pathological conditions such as stroke, multiple sclerosis, osteoarthritis, rotator cuff tear. Sensors placement and method of attachment were broadly heterogeneous among the examined studies. CONCLUSIONS: Wearable systems are a promising solution to provide quantitative and meaningful clinical information about progress in a rehabilitation pathway and to extrapolate meaningful parameters in the diagnosis of shoulder pathologies. There is a strong need for development of this novel technologies which undeniably serves in shoulder evaluation and therapy.


Assuntos
Monitorização Ambulatorial/instrumentação , Doenças Musculoesqueléticas/diagnóstico , Doenças do Sistema Nervoso/diagnóstico , Articulação do Ombro/fisiopatologia , Materiais Inteligentes , Telemetria/instrumentação , Dispositivos Eletrônicos Vestíveis , Adolescente , Adulto , Idoso , Fenômenos Biomecânicos , Desenho de Equipamento , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Doenças Musculoesqueléticas/fisiopatologia , Doenças Musculoesqueléticas/reabilitação , Doenças do Sistema Nervoso/fisiopatologia , Doenças do Sistema Nervoso/reabilitação , Valor Preditivo dos Testes , Prognóstico , Amplitude de Movimento Articular , Adulto Jovem
17.
Home Healthc Now ; 37(6): 345-349, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31688469

RESUMO

Heart failure (HF) is ranked as one of the leading causes of hospitalizations and mortality among adults of all racial/ethnic groups in the United States. Telemonitoring, as a home care intervention for HF management, has been used across all groups although the benefit for Hispanics has not been established. The purpose of this retrospective, quantitative study was to determine the differences in hospital readmission between Hispanic, non-Hispanic Black, and non-Hispanic White patients with HF who either received or did not receive home telemonitoring services from a home care agency in Connecticut. A purposive sample of 138 records of patients admitted between January 1, 2012, and June 30, 2017, with a diagnosis of HF provided the data for the study. Data were analyzed by conducting simple and multiple logistic regression analyses. The key findings showed that Hispanics who used telemonitoring were almost four times less likely to be readmitted to the hospital compared with Hispanics who did not use telemonitoring (p = .04). Race, age, gender, and insurance were not significant predictors of readmissions (p > .05). The findings from this study may provide healthcare providers with a better understanding of the outcomes of home telemonitoring for treating adult Hispanic patients with HF.


Assuntos
Afro-Americanos/estatística & dados numéricos , Grupo com Ancestrais do Continente Europeu/estatística & dados numéricos , Insuficiência Cardíaca/terapia , Hispano-Americanos/estatística & dados numéricos , Serviços de Assistência Domiciliar , Telemetria/estatística & dados numéricos , Adulto , Idoso , Idoso de 80 Anos ou mais , Connecticut , Feminino , Insuficiência Cardíaca/etnologia , Insuficiência Cardíaca/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Readmissão do Paciente/estatística & dados numéricos , Estudos Retrospectivos
18.
Cardiovasc Eng Technol ; 10(4): 618-627, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31598894

RESUMO

PURPOSE: Prompt detection of congestion is an essential target in order to prevent heart failure (HF) related hospitalization, being ambulatory monitoring a promising strategy to do so. A successful non-invasive ambulatory monitoring system requires automatic devices for physiological data recording; these data must give information about HF deterioration early enough to predict HF-related adverse events. This work aims to evaluate seven vascular parameters for the ambulatory monitoring of congestive heart failure patients. METHODS: Seven vascular parameters are proposed as indicators of HF deterioration. These parameters are obtained using venous occlusion plethysmography; a technique that uses hardware able of being miniaturized and easily integrated into wearables for ambulatory monitoring. The ability of the proposed vascular parameters to detect congestion is evaluated in eight healthy volunteers and ten congestive heart failure patients with different congestion levels-mild, moderate and severe. RESULTS: Most parameters distinguish between healthy volunteers and heart failure patients, and some of them present significant differences between volunteers and low levels of congestion-mild or moderate. CONCLUSION: Home monitoring of some of the proposed parameters could detect HF deterioration on its onset and alert to health personnel.


Assuntos
Insuficiência Cardíaca/diagnóstico , Hemodinâmica , Monitorização Ambulatorial/métodos , Pletismografia , Telemetria , Adulto , Idoso , Estudos de Casos e Controles , Desenho de Equipamento , Feminino , Insuficiência Cardíaca/fisiopatologia , Insuficiência Cardíaca/terapia , Humanos , Masculino , Pessoa de Meia-Idade , Miniaturização , Modelos Cardiovasculares , Monitorização Ambulatorial/instrumentação , Pletismografia/instrumentação , Valor Preditivo dos Testes , Prognóstico , Estudo de Prova de Conceito , Índice de Gravidade de Doença , Telemetria/instrumentação , Função Ventricular Esquerda , Dispositivos Eletrônicos Vestíveis , Adulto Jovem
19.
J Fish Biol ; 95(6): 1512-1516, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31605542

RESUMO

Bloater Coregonus hoyi (n = 48) were implanted with V9DT-2x predation transmitters and monitored on 105 acoustic receivers in eastern Lake Ontario for >6 months. Twenty-three predation events were observed, with predator retention of tags ranging from ≤1 to ≥194 days and 30% of retentions lasting >150 days. Long tag retention times raise concerns for acoustic telemetry analysis and the health of piscivorous predators retaining tags.


Assuntos
Sistemas de Identificação Animal , Comportamento Predatório , Salmonidae , Telemetria , Acústica , Animais , Lagos , Ontário
20.
Sensors (Basel) ; 19(19)2019 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-31569585

RESUMO

Localization technologies play an important role in disaster management and emergence response. In areas where the environment does not change much after an accident or in the case of dangerous areas monitoring, indoor fingerprint-based localization can be used. In such scenarios, a positioning system needs to have both a high accuracy and a rapid response. However, these two requirements are usually conflicting since a fingerprint-based indoor localization system with high accuracy usually has complex algorithms and needs to process a large amount of data, and therefore has a slow response. This problem becomes even worse when both the size of monitoring area and the number of reference nodes increase. To address this challenging problem, this paper proposes a two-level positioning algorithm in order to improve both the accuracy and the response time. In the off-line stage, a fingerprint database is divided into several sub databases by using an affinity propagation clustering (APC) algorithm based on Shepard similarity. The online stage has two steps: (1) a coarse positioning algorithm is adopted to find the most similar sub database by matching the cluster center with the fingerprint of the node tested, which will narrow the search space and consequently save time; (2) in the sub database area, a support vector regression (SVR) algorithm with its parameters being optimized by particle swarm optimization (PSO) is used for fine positioning, thus improving the online positioning accuracy. Both experiment results and actual implementations proved that the proposed two-level localization method is more suitable than other methods in term of algorithm complexity, storage requirements and localization accuracy in dangerous area monitoring.


Assuntos
Algoritmos , Tecnologia de Sensoriamento Remoto/métodos , Telemetria/métodos , Tecnologia sem Fio , Indústria Química , Análise por Conglomerados , Humanos
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