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[PMID]:29444392
[Au] Autor:Momeni M; Gaudin A
[Ti] Título:Intraoperative cerebral hypoperfusion and electroencephalogram suppression resulting in neurological complications after cardiac surgery : the need for an in depth investigation.
[So] Source:Acta Anaesthesiol Belg;67(2):73-79, 2016.
[Is] ISSN:0001-5164
[Cp] País de publicação:Belgium
[La] Idioma:eng
[Ab] Resumo:Reports on the demographic profile of older populations estimate that, in 2050, 19 countries will have at least 10% of their population aged 80 years or more. Many high risk elderly patients undergo cardiac surgery. In addition, advanced age has been shown to be a strong predictor of adverse neurological outcome. Despite sig- nificant improvements achieved in the perioperative care of cardiac surgical patients, neurological complications remain a global health issue. Recent findings have pointed out that cerebral hypoperfusion and too deep levels of anesthesia are major sources of adverse neurological outcomes. Cerebral near-in-frared spectroscopy provides information about cerebral perfusion non-invasively, and is increasingly used. Depth of anesthesia is evaluated using monitors that are based on processed electroencephalogram. This non-systematic review focuses on the results of studies performed with each monitor separately, and the need for a combined evaluation of their utility and eventual impact on neurological outcomes. The use of a combined cerebral monitoring strategy based on the two aforementioned monitors is proposed in order to optimize cerebral outcomes.
[Mh] Termos MeSH primário: Procedimentos Cirúrgicos Cardíacos/efeitos adversos
Transtornos Cerebrovasculares/etiologia
Eletroencefalografia
Monitorização Intraoperatória
Complicações Pós-Operatórias/etiologia
[Mh] Termos MeSH secundário: Disfunção Cognitiva/etiologia
Delírio/etiologia
Seres Humanos
Espectroscopia de Luz Próxima ao Infravermelho
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180215
[St] Status:MEDLINE


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[PMID]:29341066
[Au] Autor:Yu Y; Zhang K; Zhang L; Zong H; Meng L; Han R
[Ad] Endereço:Department of Anesthesiology, Beijing Tiantan Hospital, Capital Medical University, No.6 Tiantan Xili, Beijing, China, 100050.
[Ti] Título:Cerebral near-infrared spectroscopy (NIRS) for perioperative monitoring of brain oxygenation in children and adults.
[So] Source:Cochrane Database Syst Rev;1:CD010947, 2018 Jan 17.
[Is] ISSN:1469-493X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Various techniques have been employed for the early detection of perioperative cerebral ischaemia and hypoxia. Cerebral near-infrared spectroscopy (NIRS) is increasingly used in this clinical scenario to monitor brain oxygenation. However, it is unknown whether perioperative cerebral NIRS monitoring and the subsequent treatment strategies are of benefit to patients. OBJECTIVES: To assess the effects of perioperative cerebral NIRS monitoring and corresponding treatment strategies in adults and children, compared with blinded or no cerebral oxygenation monitoring, or cerebral oxygenation monitoring based on non-NIRS technologies, on the detection of cerebral oxygen desaturation events (CDEs), neurological outcomes, non-neurological outcomes and socioeconomic impact (including cost of hospitalization and length of hospital stay). SEARCH METHODS: We searched the Cochrane Central Register of Controlled Trials (CENTRAL 2016, Issue 12), Embase (1974 to 20 December 2016) and MEDLINE (PubMed) (1975 to 20 December 2016). We also searched the World Health Organization (WHO) International Clinical Trials Registry Platform for ongoing studies on 20 December 2016. We updated this search in November 2017, but these results have not yet been incorporated in the review. We imposed no language restriction. SELECTION CRITERIA: We included all relevant randomized controlled trials (RCTs) dealing with the use of cerebral NIRS in the perioperative setting (during the operation and within 72 hours after the operation), including the operating room, the postanaesthesia care unit and the intensive care unit. DATA COLLECTION AND ANALYSIS: Two authors independently selected studies, assessed risk of bias and extracted data. For binary outcomes, we calculated the risk ratio (RR) and its 95% confidence interval (CI). For continuous data, we estimated the mean difference (MD) between groups and its 95% CI. As we expected clinical and methodological heterogeneity between studies, we employed a random-effects model for analyses and we examined the data for heterogeneity (I statistic). We created a 'Summary of findings' table using GRADEpro. MAIN RESULTS: We included 15 studies in the review, comprising a total of 1822 adult participants. There are 12 studies awaiting classification, and eight ongoing studies.None of the 15 included studies considered the paediatric population. Four studies were conducted in the abdominal and orthopaedic surgery setting (lumbar spine, or knee and hip replacement), one study in the carotid endarterectomy setting, and the remaining 10 studies in the aortic or cardiac surgery setting. The main sources of bias in the included studies related to potential conflict of interest from industry sponsorship, unclear blinding status or missing participant data.Two studies with 312 participants considered postoperative neurological injury, however no pooled effect estimate could be calculated due to discordant direction of effect between studies (low-quality evidence). One study (N = 126) in participants undergoing major abdominal surgery reported that 4/66 participants experienced neurological injury with blinded monitoring versus 0/56 in the active monitoring group. A second study (N = 195) in participants having coronary artery bypass surgery reported that 1/96 participants experienced neurological injury in the blinded monitoring group compared with 4/94 participants in the active monitoring group.We are uncertain whether active cerebral NIRS monitoring has an important effect on the risk of postoperative stroke because of the low number of events and wide confidence interval (RR 0.25, 95% CI 0.03 to 2.20; 2 studies, 240 participants; low-quality evidence).We are uncertain whether active cerebral NIRS monitoring has an important effect on postoperative delirium because of the wide confidence interval (RR 0.63, 95% CI 0.27 to 1.45; 1 study, 190 participants; low-quality evidence).Two studies with 126 participants showed that active cerebral NIRS monitoring may reduce the incidence of mild postoperative cognitive dysfunction (POCD) as defined by the original studies at one week after surgery (RR 0.53, 95% CI 0.30 to 0.95, I = 49%, low-quality evidence).Based on six studies with 962 participants, there was moderate-quality evidence that active cerebral oxygenation monitoring probably does not decrease the occurrence of POCD (decline in cognitive function) at one week after surgery (RR 0.62, 95% CI 0.37 to 1.04, I = 80%). The different type of monitoring equipment in one study could potentially be the cause of the heterogeneity.We are uncertain whether active cerebral NIRS monitoring has an important effect on intraoperative mortality or postoperative mortality because of the low number of events and wide confidence interval (RR 0.63, 95% CI 0.08 to 5.03, I = 0%; 3 studies, 390 participants; low-quality evidence). There was no evidence to determine whether routine use of NIRS-based cerebral oxygenation monitoring causes adverse effects. AUTHORS' CONCLUSIONS: The effects of perioperative active cerebral NIRS monitoring of brain oxygenation in adults for reducing the occurrence of short-term, mild POCD are uncertain due to the low quality of the evidence. There is uncertainty as to whether active cerebral NIRS monitoring has an important effect on postoperative stroke, delirium or death because of the low number of events and wide confidence intervals. The conclusions of this review may change when the eight ongoing studies are published and the 12 studies awaiting assessment are classified. More RCTs performed in the paediatric population and high-risk patients undergoing non-cardiac surgery (e.g. neurosurgery, carotid endarterectomy and other surgery) are needed.
[Mh] Termos MeSH primário: Encéfalo/metabolismo
Hipóxia-Isquemia Encefálica/diagnóstico
Consumo de Oxigênio/fisiologia
Espectroscopia de Luz Próxima ao Infravermelho
[Mh] Termos MeSH secundário: Abdome/cirurgia
Adulto
Artroplastia de Quadril
Artroplastia do Joelho
Criança
Transtornos Cognitivos/prevenção & controle
Seres Humanos
Vértebras Lombares/cirurgia
Monitorização Intraoperatória
Complicações Pós-Operatórias/prevenção & controle
Ensaios Clínicos Controlados Aleatórios como Assunto
[Pt] Tipo de publicação:JOURNAL ARTICLE; META-ANALYSIS; REVIEW
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE
[do] DOI:10.1002/14651858.CD010947.pub2


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[PMID]:29386445
[Au] Autor:Sugiura A; Eto T; Kinoshita F; Takada H
[Ad] Endereço:Department of Radiological Technology, Gifu University of Medical Science.
[Ti] Título:[Effect of Reading a Book on a Tablet Computer on Cerebral Blood Flow in the Prefrontal Cortex].
[So] Source:Nihon Eiseigaku Zasshi;73(1):39-45, 2018.
[Is] ISSN:1882-6482
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Ab] Resumo:OBJECTIVES: By measuring cerebral blood flow in the prefrontal cortex, we aimed to determine how reading a book on a tablet computer affects sleep. METHODS: Seven students (7 men age range, 21-32 years) participated in this study. In a controlled illuminance environment, the subjects read a novel in printed form or on a tablet computer from any distance. As the subjects were reading, the cerebral blood flow in their prefrontal cortex was measured by near-infrared spectroscopy. The study protocol was as follows. 1) Subjects mentally counted a sequence of numbers for 30 s as a pretest to standardized thinking and then 2) read the novel for 10 min, using the printed book or tablet computer. In step 2), the use of the book or tablet computer was in a random sequence. Subjects rested between the two tasks. RESULTS: Significantly increased brain activity (increase in regional cerebral blood flow) was observed following reading a novel on a tablet computer compared with that after reading a printed book. Furthermore, the region around Broca's area was more active when reading on a tablet computer than when reading a printed book. CONCLUSIONS: Considering the results of this study and previous studies on physiological characteristics during nonrapid eye movement sleep, we concluded that reading a book on a tablet computer before the onset of sleep leads to the potential inhibition of sound sleep through mechanisms other than the suppression of melatonin secretion.
[Mh] Termos MeSH primário: Circulação Cerebrovascular/fisiologia
Computadores de Mão
Córtex Pré-Frontal/irrigação sanguínea
Leitura
Transtornos do Sono-Vigília/etiologia
Sono/fisiologia
[Mh] Termos MeSH secundário: Adulto
Livros
Seres Humanos
Masculino
Melatonina/secreção
Espectroscopia de Luz Próxima ao Infravermelho
Fatores de Tempo
Adulto Jovem
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
JL5DK93RCL (Melatonin)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180202
[St] Status:MEDLINE
[do] DOI:10.1265/jjh.73.39


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[PMID]:29338060
[Au] Autor:Saita K; Morishita T; Arima H; Hyakutake K; Ogata T; Yagi K; Shiota E; Inoue T
[Ad] Endereço:Department of Neurosurgery, Faculty of Medicine, Fukuoka University, Fukuoka, Japan.
[Ti] Título:Biofeedback effect of hybrid assistive limb in stroke rehabilitation: A proof of concept study using functional near infrared spectroscopy.
[So] Source:PLoS One;13(1):e0191361, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:INTRODUCTION: Robot-assisted rehabilitation has been increasingly drawing attention in the field of neurorehabilitation. The hybrid assistive limb (HAL) is an exoskeleton robot developed based on the "interactive biofeedback" theory, and several studies have shown its efficacy for patients with stroke. We aimed to investigate the mechanisms of the facilitative effect of neurorehabilitation using a single-joint HAL (HAL-SJ) and functional near-infrared spectroscopy (fNIRS). MATERIALS AND METHODS: Subacute stroke patients admitted to our hospital were assessed in this study for HAL eligibility. We evaluated motor-related cortical activity using an fNIRS system at baseline and immediately after HAL-SJ treatment on the same day. Cortical activity was determined through the relative changes in the hemoglobin concentrations. For statistical analysis, we compared the number of flexion/extension movements before and immediately after HAL-SJ treatment using paired t-test. fNIRS used both the methods of statistical parametric mapping and random effect analysis. RESULTS: We finally included 10 patients (eight men, two women; mean age: 66.8 ± 12.0 years). The mean number of flexion/extension movements within 15 s increased significantly from 4.2 ± 3.1 to 5.3 ± 4.1 immediately after training. fNIRS showed increased cortical activation in the primary motor cortex of the ipsilesional hemisphere immediately after HAL-SJ treatment compared to the baseline condition. CONCLUSIONS: This study is the first to support the concept of the biofeedback effect from the perspective of changes in cortical activity measured with an fNIRS system. The biofeedback effect of HAL immediately increased the task-related cortical activity, and this may address the functional recovery. Further studies are warranted to support our findings.
[Mh] Termos MeSH primário: Biorretroalimentação Psicológica/instrumentação
Exoesqueleto Energizado
Espectroscopia de Luz Próxima ao Infravermelho
Reabilitação do Acidente Vascular Cerebral/instrumentação
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Imagem por Ressonância Magnética
Masculino
Meia-Idade
Tomografia Computadorizada por Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180117
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191361


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[PMID]:29317625
[Au] Autor:Hall MP; Woodroofe CC; Wood MG; Que I; Van't Root M; Ridwan Y; Shi C; Kirkland TA; Encell LP; Wood KV; Löwik C; Mezzanotte L
[Ad] Endereço:Promega Corporation, Madison, WI, 53711, USA.
[Ti] Título:Click beetle luciferase mutant and near infrared naphthyl-luciferins for improved bioluminescence imaging.
[So] Source:Nat Commun;9(1):132, 2018 01 09.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The sensitivity of bioluminescence imaging in animals is primarily dependent on the amount of photons emitted by the luciferase enzyme at wavelengths greater than 620 nm where tissue penetration is high. This area of work has been dominated by firefly luciferase and its substrate, D-luciferin, due to the system's peak emission (~ 600 nm), high signal to noise ratio, and generally favorable biodistribution of D-luciferin in mice. Here we report on the development of a codon optimized mutant of click beetle red luciferase that produces substantially more light output than firefly luciferase when the two enzymes are compared in transplanted cells within the skin of black fur mice or in deep brain. The mutant enzyme utilizes two new naphthyl-luciferin substrates to produce near infrared emission (730 nm and 743 nm). The stable luminescence signal and near infrared emission enable unprecedented sensitivity and accuracy for performing deep tissue multispectral tomography in mice.
[Mh] Termos MeSH primário: Benzotiazóis/metabolismo
Coleópteros/enzimologia
Proteínas de Insetos/metabolismo
Luciferases/metabolismo
[Mh] Termos MeSH secundário: Animais
Benzotiazóis/química
Células HEK293
Seres Humanos
Proteínas de Insetos/genética
Luciferases/genética
Luminescência
Medições Luminescentes/métodos
Células MCF-7
Camundongos Endogâmicos C57BL
Camundongos Nus
Microscopia de Fluorescência
Mutação
Espectroscopia de Luz Próxima ao Infravermelho
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Benzothiazoles); 0 (D-luciferin); 0 (Insect Proteins); EC 1.13.12.- (Luciferases)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180111
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02542-9


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[PMID]:28747364
[Au] Autor:Lorenz L; Marulli A; Dawson JA; Owen LS; Manley BJ; Donath SM; Davis PG; Kamlin COF
[Ad] Endereço:Newborn Research Centre and Neonatal Services, The Royal Women's Hospital, Melbourne, Australia.
[Ti] Título:Cerebral oxygenation during skin-to-skin care in preterm infants not receiving respiratory support.
[So] Source:Arch Dis Child Fetal Neonatal Ed;103(2):F137-F142, 2018 Mar.
[Is] ISSN:1468-2052
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: Skin-to-skin care (SSC) has proven benefits in preterm infants, but increased hypoxic and bradycardic events have been reported. This may make clinicians hesitant to recommend SSC as standard care. We hypothesised that regional cerebral oxygenation (rStO ) measured with near infrared spectroscopy is not worse during SSC compared with standard incubator care. DESIGN: Prospective, observational, non-inferiority study. SETTING: Single tertiary perinatal centre in Australia. PATIENTS: Forty preterm infants (median (IQR) 30.6 (29.1-31.7) weeks' gestation) not receiving respiratory support were studied on day 14 (8-38). INTERVENTIONS: Recordings during 90 min of incubator care, followed by 90 min of SSC. Each infant acted as their own control and caregivers were blinded to the rStO measurements. MAIN OUTCOME MEASURES: The primary outcome was the mean difference in rStO between SSC and incubator care. The prespecified margin of non-inferiority was -1.5%. Secondary outcomes included heart rate (HR), peripheral oxygen saturation (SpO ), time in quiet sleep, temperature and hypoxic (SpO <80% for >5 s) or bradycardic events (HR <80 bpm for >5 s) and time spent in cerebral hypoxia (rStO <55%) and hyperoxia (rStO >85%). RESULTS: Mean (SD) rStO was lower during SSC compared with incubator care: 73.6 (6.0)% vs 74.8 (4.6)%, mean difference (95% CI) 1.3 (2.2 to 0.4)%. HR was 5 bpm higher, SpO 1% lower and time in quiet sleep 24% longer during SSC. Little evidence of a difference was observed in temperature. The number of hypoxic or bradycardic events as well as the proportion of time spent in cerebral hypoxia and hyperoxia was very low in both periods. CONCLUSIONS: Mean rStO was marginally lower during SSC without observed differences in hypoxic or bardycardic events but an increase in time spent in quiet sleep. TRIAL REGISTRATION NUMBER: This trial is linked to Australian New Zealand Clinical Trials Registry: identifier 12616000240448. It was registered pre-results.
[Mh] Termos MeSH primário: Circulação Cerebrovascular/fisiologia
Recém-Nascido Prematuro
Método Canguru/métodos
Oxigênio/sangue
[Mh] Termos MeSH secundário: Austrália
Feminino
Seres Humanos
Lactente Extremamente Prematuro
Recém-Nascido
Masculino
Oximetria
Estudos Prospectivos
Espectroscopia de Luz Próxima ao Infravermelho
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Nm] Nome de substância:
S88TT14065 (Oxygen)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170728
[St] Status:MEDLINE
[do] DOI:10.1136/archdischild-2016-312471


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[PMID]:28471110
[Au] Autor:Luo Y; Li WL; Huang WH; Liu XH; Song YG; Qu HB
[Ad] Endereço:Pharmaceutical Informatics Institute, Zhejiang University, Hangzhou 310058, China.
[Ti] Título:Rapid quantification of multi-components in alcohol precipitation liquid of Codonopsis Radix using near infrared spectroscopy (NIRS).
[So] Source:J Zhejiang Univ Sci B;18(5):383-392, 2017 May.
[Is] ISSN:1862-1783
[Cp] País de publicação:China
[La] Idioma:eng
[Ab] Resumo:A near infrared spectroscopy (NIRS) approach was established for quality control of the alcohol precipitation liquid in the manufacture of Codonopsis Radix. By applying NIRS with multivariate analysis, it was possible to build variation into the calibration sample set, and the Plackett-Burman design, Box-Behnken design, and a concentrating-diluting method were used to obtain the sample set covered with sufficient fluctuation of process parameters and extended concentration information. NIR data were calibrated to predict the four quality indicators using partial least squares regression (PLSR). In the four calibration models, the root mean squares errors of prediction (RMSEPs) were 1.22 µg/ml, 10.5 µg/ml, 1.43 µg/ml, and 0.433% for lobetyolin, total flavonoids, pigments, and total solid contents, respectively. The results indicated that multi-components quantification of the alcohol precipitation liquid of Codonopsis Radix could be achieved with an NIRS-based method, which offers a useful tool for real-time release testing (RTRT) of intermediates in the manufacture of Codonopsis Radix.
[Mh] Termos MeSH primário: Codonopsis/química
Medicamentos de Ervas Chinesas/química
Etanol/química
Precipitação Fracionada/métodos
Modelos Estatísticos
Extratos Vegetais/química
Espectroscopia de Luz Próxima ao Infravermelho/métodos
[Mh] Termos MeSH secundário: Misturas Complexas/análise
Misturas Complexas/química
Simulação por Computador
Medicamentos de Ervas Chinesas/análise
Modelos Químicos
Extratos Vegetais/análise
Soluções/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Complex Mixtures); 0 (Drugs, Chinese Herbal); 0 (Plant Extracts); 0 (Solutions); 3K9958V90M (Ethanol)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170505
[St] Status:MEDLINE
[do] DOI:10.1631/jzus.B1600141


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[PMID]:29304152
[Au] Autor:Hu M; Zhai G; Li D; Fan Y; Duan H; Zhu W; Yang X
[Ad] Endereço:Shanghai Institute for Advanced Communication and Data Science, Shanghai Key Laboratory of Digital Media Processing and Transmission, Shanghai Jiao Tong University, Shanghai, China.
[Ti] Título:Combination of near-infrared and thermal imaging techniques for the remote and simultaneous measurements of breathing and heart rates under sleep situation.
[So] Source:PLoS One;13(1):e0190466, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:To achieve the simultaneous and unobtrusive breathing rate (BR) and heart rate (HR) measurements during nighttime, we leverage a far-infrared imager and an infrared camera equipped with IR-Cut lens and an infrared lighting array to develop a dual-camera imaging system. A custom-built cascade face classifier, containing the conventional Adaboost model and fully convolutional network trained by 32K images, was used to detect the face region in registered infrared images. The region of interest (ROI) inclusive of mouth and nose regions was afterwards confirmed by the discriminative regression and coordinate conversions of three selected landmarks. Subsequently, a tracking algorithm based on spatio-temporal context learning was applied for following the ROI in thermal video, and the raw signal was synchronously extracted. Finally, a custom-made time-domain signal analysis approach was developed for the determinations of BR and HR. A dual-mode sleep video database, including the videos obtained under environment where illumination intensity ranged from 0 to 3 Lux, was constructed to evaluate the effectiveness of the proposed system and algorithms. In linear regression analysis, the determination coefficient (R2) of 0.831 had been observed for the measured BR and reference BR, and this value was 0.933 for HR measurement. In addition, the Bland-Altman plots of BR and HR demonstrated that almost all the data points located within their own 95% limits of agreement. Consequently, the overall performance of the proposed technique is acceptable for BR and HR estimations during nighttime.
[Mh] Termos MeSH primário: Frequência Cardíaca
Respiração
Sono/fisiologia
Espectroscopia de Luz Próxima ao Infravermelho/métodos
[Mh] Termos MeSH secundário: Seres Humanos
Modelos Biológicos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180106
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190466


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[PMID]:29195365
[Au] Autor:Wang P; Cao Y; Yin M; Li Y; Wu J
[Ad] Endereço:College of Communication Engineering, Chongqing University, Chongqing 400044, China.
[Ti] Título:A burn depth detection system based on near infrared spectroscopy and ensemble learning.
[So] Source:Rev Sci Instrum;88(11):114302, 2017 Nov.
[Is] ISSN:1089-7623
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Near infrared (NIR) spectroscopy can effectively detect the changes in the burned tissue. However, due to the complex relationship between the spectral signals and the burn depth, simple methods of data analysis are difficult to solve this problem effectively. Therefore, in this paper, a machine learning method is introduced into the NIR spectral signal analysis, which is used to establish the relationship between NIR spectral signals and burn depth. First, based on the intensity of the spectral signal and the diffuse reflection theory, the optical properties that can reflect the change of burned tissue are extracted. And then the chained-agent genetic algorithm (CAGA) optimized support vector regression (SVR) is applied to establish a regression model between the optical property parameters and burn depth. Finally, the porcine model was used for verification. The experimental results demonstrate that the proposed CAGA-SVR integrated inversion model with optical properties can perform accurate inversion of burn depth and provide a reference for doctors.
[Mh] Termos MeSH primário: Queimaduras/diagnóstico por imagem
Espectroscopia de Luz Próxima ao Infravermelho
[Mh] Termos MeSH secundário: Algoritmos
Animais
Modelos Animais
Suínos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171203
[St] Status:MEDLINE
[do] DOI:10.1063/1.4997121


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[PMID]:28456232
[Au] Autor:Dai W; Lin L; Li G
[Ad] Endereço:State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China.
[Ti] Título:New method of extracting information of arterial oxygen saturation based on ∑|𝚫|.
[So] Source:Rev Sci Instrum;88(4):043107, 2017 Apr.
[Is] ISSN:1089-7623
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Noninvasive detection of oxygen saturation with near-infrared spectroscopy has been widely used in clinics. In order to further enhance its detection precision and reliability, this paper proposes a method of time domain absolute difference summation (∑|Δ|) based on a dynamic spectrum. In this method, the ratio of absolute differences between intervals of two differential sampling points at the same moment on logarithm photoplethysmography signals of red and infrared light was obtained in turn, and then they obtained a ratio sequence which was screened with a statistical method. Finally, use the summation of the screened ratio sequence as the oxygen saturation coefficient Q. We collected 120 reference samples of SpO and then compared the result of two methods, which are ∑|Δ| and peak-peak. Average root-mean-square errors of the two methods were 3.02% and 6.80%, respectively, in the 20 cases which were selected randomly. In addition, the average variance of Q of the 10 samples, which were obtained by the new method, reduced to 22.77% of that obtained by the peak-peak method. Comparing with the commercial product, the new method makes the results more accurate. Theoretical and experimental analysis indicates that the application of the ∑|Δ| method could enhance the precision and reliability of oxygen saturation detection in real time.
[Mh] Termos MeSH primário: Oximetria
Oxigênio/análise
Espectroscopia de Luz Próxima ao Infravermelho/métodos
[Mh] Termos MeSH secundário: Seres Humanos
Fotopletismografia
Reprodutibilidade dos Testes
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
S88TT14065 (Oxygen)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170501
[St] Status:MEDLINE
[do] DOI:10.1063/1.4979878



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