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1.
J Biomed Opt ; 26(4)2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33715317

RESUMO

SIGNIFICANCE: The need for regulatory review of infrared thermographs (IRTs) used on humans was removed in response to the unique circumstances of the SARS-CoV-2 pandemic (a.k.a., COVID-19). The market for these devices has since expanded considerably. This evaluation of IRT performance may have significant implications for febrility screening worldwide. AIM: Perform controlled nonhuman trials of IRT devices to identify and quantify deviations in the human temperature range. APPROACH: We compared IRT readings of a temperature-controlled non-human subject with one FDA-cleared IRT and one FDA-cleared handheld NCIT. In individual trials for each device, the subject was measured between 35°C and 40°C at 0.25°C increments. RESULTS: The IRT device measurements were consistently normalized around the human mean (∼37 ° C). Temperatures were decremented as they approached the febrile range, and systematically reported as normal across all seven devices. This effect does not appear to be explained by a fixed offset or any known approach to estimating body temperature, or by random error. CONCLUSION: The IRTs in this study generated human temperature measurements that were systematically biased to the mean human temperature. Given that these devices are utilized for sentinel detection of possible infectious disease transmission, and are now globally employed, the implications for reduced detection of febrility are a widespread false sense of security. This vulnerability must be considered with respect to facility access control, clinical applications, and travel screening in the context of the ongoing COVID-19 pandemic response.


Assuntos
Temperatura Corporal , Febre/diagnóstico , Termografia/métodos , Febre/etiologia , Humanos , Programas de Rastreamento , Termografia/instrumentação
2.
Sensors (Basel) ; 21(4)2021 Feb 21.
Artigo em Inglês | MEDLINE | ID: mdl-33670066

RESUMO

Infrared thermography for camera-based skin temperature measurement is increasingly used in medical practice, e.g., to detect fevers and infections, such as recently in the COVID-19 pandemic. This contactless method is a promising technology to continuously monitor the vital signs of patients in clinical environments. In this study, we investigated both skin temperature trend measurement and the extraction of respiration-related chest movements to determine the respiratory rate using low-cost hardware in combination with advanced algorithms. In addition, the frequency of medical examinations or visits to the patients was extracted. We implemented a deep learning-based algorithm for real-time vital sign extraction from thermography images. A clinical trial was conducted to record data from patients on an intensive care unit. The YOLOv4-Tiny object detector was applied to extract image regions containing vital signs (head and chest). The infrared frames were manually labeled for evaluation. Validation was performed on a hold-out test dataset of 6 patients and revealed good detector performance (0.75 intersection over union, 0.94 mean average precision). An optical flow algorithm was used to extract the respiratory rate from the chest region. The results show a mean absolute error of 2.69 bpm. We observed a computational performance of 47 fps on an NVIDIA Jetson Xavier NX module for YOLOv4-Tiny, which proves real-time capability on an embedded GPU system. In conclusion, the proposed method can perform real-time vital sign extraction on a low-cost system-on-module and may thus be a useful method for future contactless vital sign measurements.


Assuntos
Aprendizado Profundo , Unidades de Terapia Intensiva , Termografia/instrumentação , Sinais Vitais , Humanos
3.
Artigo em Inglês | MEDLINE | ID: mdl-33530640

RESUMO

Thermography is widely used in the medical field, including in the detection of breast disorders. The aim of the research was to characterize the range of breast surface temperature values, taking into account the entire area of the mammary gland and, independently, the nipple, in healthy women. An additional aim was to assess the symmetry of the breast temperature distribution (using an IR camera) and the correlation of temperatures with the content of adipose tissue. Thermograms were made for the right and left breasts, each time delineating the area of the entire breast and a separate area of the nipple, chest, and abdomen. Analyzing the intergroup differences in temperature of selected body areas (Tmean), it was shown that, in all cases, they were significantly higher in younger women. Statistical analysis showed no significant differences between breast and nipple temperatures in relation to the body sides. The highest temperatures within the mammary gland were recorded for the nipple area. The use of the high-resolution digital infrared thermal imaging method in early and screening preventive diagnoses of changes in the mammary gland requires individual interpretation of the results, taking into account the assessment of the physiological pattern of temperature distribution in both breasts.


Assuntos
Neoplasias da Mama , Termografia , Temperatura Corporal , Mama , Feminino , Humanos , Temperatura
4.
Sensors (Basel) ; 21(3)2021 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-33573296

RESUMO

Thermography enables non-invasive, accessible, and easily repeated foot temperature measurements for diabetic patients, promoting early detection and regular monitoring protocols, that limit the incidence of disabling conditions associated with diabetic foot disorders. The establishment of this application into standard diabetic care protocols requires to overcome technical issues, particularly the foot sole segmentation. In this work we implemented and evaluated several segmentation approaches which include conventional and Deep Learning methods. Multimodal images, constituted by registered visual-light, infrared and depth images, were acquired for 37 healthy subjects. The segmentation methods explored were based on both visual-light as well as infrared images, and optimization was achieved using the spatial information provided by the depth images. Furthermore, a ground truth was established from the manual segmentation performed by two independent researchers. Overall, the performance level of all the implemented approaches was satisfactory. Although the best performance, in terms of spatial overlap, accuracy, and precision, was found for the Skin and U-Net approaches optimized by the spatial information. However, the robustness of the U-Net approach is preferred.


Assuntos
Aprendizado Profundo , Diabetes Mellitus , Pé Diabético , Doenças do Pé , Pé Diabético/diagnóstico por imagem , Diagnóstico Precoce , Pé/diagnóstico por imagem , Humanos , Termografia
5.
Medicine (Baltimore) ; 100(5): e23804, 2021 Feb 05.
Artigo em Inglês | MEDLINE | ID: mdl-33592838

RESUMO

BACKGROUND: The vast majority of previous studies focused on the relationship between 1 meridian and 1 organ, and the comparison and specificity between 2 meridians is rarely explored. Thus, the aim of this study is to compare the heat transport characteristics between 2 different meridians and the specificity between them will also be investigated. METHODS: The Lung and Heart meridians are chosen for comparison of 2 different meridians. We will enroll 120 subjects and divide them into the healthy control group, chronic obstructive pulmonary disease (COPD) group and healthy intervention group, in a 1:1:1 ratio. Infrared thermography (IRT) will be used to assess the heat transport characteristics of the Heart and Lung meridians. The specificity for the meridian-visceral association will be investigated by comparing the difference in heat transport characteristic between the Heart and Lung meridians in the healthy control group and COPD group. Meanwhile, moxibustion will be given to subjects in the Heart meridian and Lung meridian respectively in the healthy intervention group to verify the specificity for the surface-surface association. RESULTS: The primary outcomes will be the temperature of corresponding sites along the Heart and Lung meridians. CONCLUSION: This study will verify the specificity between different meridians by comparing the difference in heat transport characteristic. The findings will guide the selection of acupoints to optimize the therapeutic effect of acupuncture and help determine whether IRT could be used to assist in the diagnosis of COPD. ETHICS AND DISSEMINATION: The study has been approved by the Third Affiliated Hospital of Zhejiang Chinese Medical University (Approval No. ZSLL-KY-2019-001G-01). TRIAL REGISTRATION NUMBERS: NCT04046588.


Assuntos
Meridianos , Doença Pulmonar Obstrutiva Crônica/fisiopatologia , Termografia , Adulto , Idoso , Transporte Biológico , Estudos de Casos e Controles , Feminino , Coração , Temperatura Alta , Humanos , Pulmão/metabolismo , Masculino , Pessoa de Meia-Idade , Miocárdio/metabolismo , Doença Pulmonar Obstrutiva Crônica/terapia
6.
Sensors (Basel) ; 21(2)2021 Jan 06.
Artigo em Inglês | MEDLINE | ID: mdl-33419187

RESUMO

The need to measure body temperature contactless and quickly during the COVID-19 pandemic emergency has led to the widespread use of infrared thermometers, thermal imaging cameras and thermal scanners as an alternative to the traditional contact clinical thermometers. However, limits and issues of noncontact temperature measurement devices are not well known and technical-scientific literature itself sometimes provides conflicting reference values on the body and skin temperature of healthy subjects. To limit the risk of contagion, national authorities have set the obligation to measure body temperature of workers at the entrance to the workplace. In this paper, the authors analyze noncontact body temperature measurement issues from both clinical and metrological points of view with the aim to (i) improve body temperature measurements accuracy; (ii) estimate the uncertainty of body temperature measurement on the field; (iii) propose a screening decision rule for the prevention of the spread of COVID-19. The approach adopted in this paper takes into account both the traditional instrumental uncertainty sources and clinical-medical ones related to the subjectivity of the measurand. A proper screening protocol for body temperature measurement considering the role of uncertainty is essential to correctly choose the threshold temperature value and measurement method to access critical places during COVID-19 pandemic emergency.


Assuntos
Temperatura Corporal , /isolamento & purificação , Incerteza , /fisiopatologia , Humanos , Termografia/instrumentação
7.
Anticancer Res ; 41(1): 453-458, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33419843

RESUMO

BACKGROUND AND AIM: Anastomotic leakage, the most common major complication after esophagectomy, is an important early postoperative complication that results in reoperation, delayed discharge, and psychological and financial distress. The current study focused on gastric conduit blood flow and investigated the relationship between gastric conduit temperature and anastomotic leakage. PATIENTS AND METHODS: Between July 2015 and December 2017, a total of 51 patients aged 38 to 84 years who underwent esophagectomy followed by esophagogastric anastomosis with gastric conduit reconstruction were enrolled. Thermography was then used to measure the temperature of the intact stomach and gastric conduit before anastomosis. RESULTS: The temperature of the planned site of gastric conduit anastomosis was significantly inversely correlated with anastomotic leakage, with the receiver operator characteristic curve showing a cutoff point of 27.6°C for predicting anastomotic leakage. CONCLUSION: The temperature of the planned gastric tube anastomosis line should be kept at 27.6°C or higher to reduce anastomotic leakage.


Assuntos
Fístula Anastomótica/diagnóstico , Fístula Anastomótica/etiologia , Neoplasias Esofágicas/complicações , Esofagectomia/efeitos adversos , Complicações Pós-Operatórias/diagnóstico , Procedimentos Cirúrgicos Reconstrutivos , Estômago/cirurgia , Termografia , Adulto , Idoso , Idoso de 80 Anos ou mais , Temperatura Corporal , Neoplasias Esofágicas/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/etiologia , Prognóstico , Procedimentos Cirúrgicos Reconstrutivos/métodos , Estudos Retrospectivos , Termografia/métodos
8.
Arq Bras Oftalmol ; 84(1): 22-30, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33470338

RESUMO

PURPOSE: The aim of this study was to present our own experience with the use of thermography as a complementary method for the initial diagnosis and differentiation of intraocular tumors, as well as for the evaluation of the efficacy of treatment of intraocular melanomas. METHODS: The study group comprised 37 patients with intraocular tumors, including 9 with uveal melanoma, 8 with uveal melanoma after I125 brachytherapy, 12 with a focal metastasis to the uvea, and 8 with retinal capillary hemangioblastoma. A FLIR T640 camera was used to capture images in the central point of the cornea, eye area, and orbital cavity area. RESULTS: Eyes with uveal melanoma had higher temperature compared with the fellow normal eye of the patient in the range of all measured parameters in the regions of interest. In the group of patients with melanoma after unsuccessful brachytherapy, higher temperature was observed at the central point of the cornea. In patients with tumor regression, all measured parameters were lower in the affected eye. We observed lower tempe-ratures in the range of all tested parameters and areas in eyes with choroidal metastases. Eyes with diagnosed intraocular hemangioblastoma were characterized by higher parameters for the regions of interest versus eyes without this pathology. CONCLUSIONS: A thermographic examination of the eye can be used as an additional first-line diagnostic tool for the differentiation of intraocular tumors. Thermography can be a helpful tool in monitoring the treatment outcome in patients with intraocular melanoma.


Assuntos
Braquiterapia , Melanoma , Neoplasias Uveais , Humanos , Melanoma/diagnóstico , Termografia , Úvea , Neoplasias Uveais/diagnóstico , Neoplasias Uveais/radioterapia
9.
BMC Neurol ; 21(1): 39, 2021 Jan 28.
Artigo em Inglês | MEDLINE | ID: mdl-33509130

RESUMO

BACKGROUND: Ramsay Hunt syndrome (RHS) is caused by a reactivation of varicella-zoster virus (VZV) infection, and it is characterized by the symptoms of facial paralysis, otalgia, auricular rash, and/or an oral lesion. Elderly patients or immunocompromised patients, deep pain at the initial visit and no prompt treatment are significant predictors of postherpetic neuralgia (PHN). When PHN occurs, especially involved cranial polyneuropathy, multiple modalities should be administered for patients with the intractable PHN. The use of thermography in the follow-up of PHN secondary to RHS with multicranial nerve involvement has not yet been described yet in the literature. CASE PRESENTATION: The patient was a 78-year-old man with the chief complaint of a 3-month history of PHN secondary to RHS with polycranial nerve (V, VII, VIII, and IX) involvement. Multimodality therapy with oral gabapentin, pulsed radiofrequency (PRF) application to the Gasserian ganglion for pain in the trigeminal nerve region, linear-polarized near-infrared light irradiation for pain in the facial nerve region, and 2% lidocaine spray for pain in the glossopharyngeal nerve region was used to the treat patient, and follow-up evaluations included thermography. This comprehensive treatment obviously improved the quality of life, resulting in considerable pain relief, as indicated by a decrease in the numerical rating scale (NRS) score from 9 to 3 and a decrease in thermal imaging temperature from higher to average temperature on the ipsilateral side compared with the contralateral side. Lidocaine spray on the tonsillar branches of the glossopharyngeal nerve resulted in an improvement in odynophagia, and the NRS score decreased from 9 to 0 for glossopharyngeal neuralgia after three applications. CONCLUSION: Although the use of thermography in the follow-up of RHS with multiple cranial nerve (V, VII, VIII, and IX) involvement is very rare, in this patient, thermal imaging showed the efficacy of combination therapy (oral gabapentin, 2% lidocaine sprayed, PRF application and linear-polarized near-infrared light irradiation) and that is a good option for treatment.


Assuntos
Herpes Zoster da Orelha Externa/complicações , Herpes Zoster da Orelha Externa/diagnóstico , Neuralgia Pós-Herpética/diagnóstico , Neuralgia Pós-Herpética/etiologia , Termografia/métodos , Idoso , Analgésicos/uso terapêutico , Anestésicos Locais/uso terapêutico , Seguimentos , Gabapentina/uso terapêutico , Humanos , Lidocaína/uso terapêutico , Masculino , Neuralgia Pós-Herpética/terapia , Fototerapia/métodos , Tratamento por Radiofrequência Pulsada/métodos
10.
Chemosphere ; 262: 127648, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32771705

RESUMO

Spectrometric analysis is one of the most widely used approaches to characterize the chemical nature of microplastics. Despite recent developments, this key step remains time consuming. The aim of this paper is to propose a new method for the pre-detection of microplastics based on mid-infrared imaging. Plastic particles were mixed with sand particles and placed on a glass filter. Infrared observation with a thermal camera shows a stronger thermal contrast measured between the filter and the plastics than between the filter and the sand, which reveals the plastic particles in a few tens of seconds. An image processing tool is then used to amplify this contrast. Furthermore, this pre-detection method makes it possible to propose hypotheses on the most probable chemical nature of the particles identified. Consequently, pre-detection using active thermography constitutes a promising way of significantly accelerating microplastic study.


Assuntos
Monitoramento Ambiental/métodos , Microplásticos , Plásticos/química , Termografia , Poluentes Químicos da Água/análise
11.
Ultrasonics ; 110: 106292, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33152656

RESUMO

Thermal strain imaging (TSI) is a promising technique for ultrasonic thermometry, especially in the applications of thermal therapies. The accuracy of TSI is dependent on the sampling rate and line density of B-Scan images, and the prevalent IQ-demodulated ultrasound data outputted from low- and middle-end machines are therefore insufficient. Here, the feasibility of using interpolated IQ images for TSI (based on the "infinitesimal echo strain filter" model) is studied through in vivo experiments targeting the perirenal fat of pigs. It is demonstrated that, axial interpolations, especially those using the zero-padding algorithm, can recover the capabilities of the low-sampling-rate complex IQ images in TSI, and make their performances comparable to those of RF/IQ complex images with higher sample rate. Meanwhile, interpolations along the lateral direction can increase the line density of IQ images, reduce TSI errors, and reveal more details in the temperature maps. In the experiments, the variation in the thermometry coefficient (the k-value) is well below 3%. The findings here bring down the requirement of high sampling rate as well as high line density of US images in TSI, making it possible to be applied on common US machines.


Assuntos
Tecido Adiposo/diagnóstico por imagem , Rim/diagnóstico por imagem , Termografia/métodos , Ultrassonografia de Intervenção/métodos , Algoritmos , Animais , Temperatura Alta , Micro-Ondas , Estresse Mecânico , Suínos
12.
Eur J Clin Invest ; 51(3): e13474, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33336385

RESUMO

INTRODUCTION: Despite being widely used as a screening tool, a rigorous scientific evaluation of infrared thermography for the diagnosis of minimally symptomatic patients suspected of having COVID-19 infection has not been performed. METHODS: A consecutive sample of 60 adult individuals with a history of close contact with COVID-19 infected individuals and mild respiratory symptoms for less than 7 days and 20 confirmed COVID-19 negative healthy volunteers were enrolled in the study. Infrared thermograms of the face were obtained with a mobile camera, and RT-PCR was used as the reference standard test to diagnose COVID-19 infection. Temperature values and distribution of the face of healthy volunteers and patients with and without COVID-19 infection were then compared. RESULTS: Thirty-four patients had an RT-PCR confirmed diagnosis of COVID-19 and 26 had negative test results. The temperature asymmetry between the lacrimal caruncles and the forehead was significantly higher in COVID-19 positive individuals. Through a random forest analysis, a cut-off value of 0.55°C was found to discriminate with an 82% accuracy between patients with and without COVID-19 confirmed infection. CONCLUSIONS: Among adults with a history of COVID-19 exposure and mild respiratory symptoms, a temperature asymmetry of ≥ 0.55°C between the lacrimal caruncle and the forehead is highly suggestive of COVID-19 infection. This finding questions the widespread use of the measurement of absolute temperature values of the forehead as a COVID-19 screening tool.


Assuntos
Temperatura Corporal , Olho , Testa , Termografia/métodos , Adulto , Estudos de Casos e Controles , Feminino , Humanos , Raios Infravermelhos , Aprendizado de Máquina , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Estudos Prospectivos , Índice de Gravidade de Doença
13.
Fisioterapia (Madr., Ed. impr.) ; 42(6): 327-331, nov.-dic. 2020. graf, ilus
Artigo em Espanhol | IBECS | ID: ibc-197912

RESUMO

OBJETIVO: Describir los cambios termográficos tras la intervención con terapia manual instrumentalizada (TMI) en un sujeto con lumbalgia. MATERIAL Y MÉTODOS: Sujeto de estudio mujer de 28 años, oficinista, parcialmente activa con periodos prolongados de inactividad, sin toxicomanías. Presenta antecedentes de lumbalgia crónica, criterio principal de inclusión. El proceso de intervención fue realizado por un fisioterapeuta certificado en TMI siguiendo el protocolo de lumbalgia. La evaluación e intervención se desarrolló en una sola sesión con un total de 6 imágenes. Se analizó el comportamiento de la temperatura en grados centígrados una vez marcados los puntos térmicos a evaluar en cada zona. RESULTADOS: Se registraron cambios de temperatura en región lumbar con un aumento promedio de 0,45°C. Para la zona abdominal la temperatura final no superó la inicial a excepción del oblicuo derecho. CONCLUSIONES: La evaluación termográfica tras la intervención con TMI evidenció cambios en la temperatura de la zona intervenida. La termografía mostró ser una herramienta que ayuda a determinar los cambios de temperatura y sirve como pauta para la valoración del curso de intervención fisioterapéutica


OBJECTIVE: To describe the thermographic changes after intervention with Instrumentalized Manual Therapy (IMT) in a subject with low back pain. MATERIAL AND METHODS: 28-year-old female study subject, office worker, partially active with prolonged periods of inactivity. Presenting a history of chronic low back pain, the main inclusion criteria. The intervention process was carried out by an IMT-certified physical therapist following the low back pain protocol. The evaluation and intervention were carried out in a single session with a total of 6 images. The behaviour of the temperature in degrees centigrade was analysed once the thermal points to be evaluated in each zone were marked. RESULTS: Temperature changes were recorded in the lumbar region with an average increase of .45° C. For the abdominal area, the final temperature did not exceed the initial temperature except for the right oblique. CONCLUSIONS: The thermographic evaluation after the intervention with IMT showed changes in the temperature of the manipulated area. Thermography proved to be a tool that helps determine temperature changes and serves as a guideline for evaluating the course of physiotherapeutic intervention


Assuntos
Humanos , Feminino , Adulto , Termografia/classificação , Termografia/instrumentação , Dor Lombar/terapia , Temperatura Corporal/fisiologia , Manipulação da Coluna/métodos , Modalidades de Fisioterapia , Dor Lombar/reabilitação
14.
Apunts, Med. esport (Internet) ; 55(208): 120-127, oct.-dic. 2020. tab, graf, ilus
Artigo em Inglês | IBECS | ID: ibc-197955

RESUMO

INTRODUCTION: Exercise induces modifications in thermal homeostasis. The type of exercise may have a specific impact on skin temperature (Tsk). OBJECTIVE: To analyze and compare the behavior of Tsk in a resistance training between men and women and monitor the thermal recovery response. MATERIAL AND METHODS: Sixteen male and female adults (24.56±3.22 years old) underwent a resistance circuit training session. They performed 3 sets of 12 repetitions with 70-80% 1 RM for lat pulldown, leg press, and biceps arm curl exercises. Thermograms were taken in anterior and posterior body view at rest, 20min, and 24h after training. Tsk was measured in the body regions of interest corresponding to the brachial biceps, quadriceps, and upper back. ANOVA with Tukey's post hoc test was used to analyze Tsk changes among moments, and independent samples t-test was used to compare Tsk between males and females. RESULTS: At rest, women showed Tsk significantly lower than men. There was no significant Tsk change 20min after exercise. However, Tsk increased 24h after exercise in the upper back for men compared with baseline and in quadriceps for women compared with baseline and 20min after exercise (p < 0.05). CONCLUSION: The Tsk of women at rest is lower than that of men. A resistance circuit training session does not significantly change Tsk 20min after exercise, but it increases Tsk 24h after training in the upper back for men and quadriceps for women


No disponible


Assuntos
Humanos , Masculino , Feminino , Adulto , Termografia/instrumentação , Estudo de Prova de Conceito , Resistência Física/efeitos da radiação , Termografia/métodos , Treinamento de Resistência/métodos , Análise de Variância , Regulação da Temperatura Corporal , Músculo Esquelético/efeitos da radiação , Músculo Quadríceps/efeitos da radiação
16.
Medicine (Baltimore) ; 99(46): e22391, 2020 Nov 13.
Artigo em Inglês | MEDLINE | ID: mdl-33181638

RESUMO

Although plantar thermography can evaluate the immediate perfusion result after an endovascular therapy (EVT) has been performed, a relevant wound outcome study is still lacking.This study was to investigate whether angiosome-based plantar thermography could predict wound healing and freedom from major amputation after EVT in patients with critical limb ischemia (CLI).All 124 patients with CLI (Rutherford category 5 and 6) who underwent EVT from January 2017 to February 2019 were prospectively enrolled. All patients received thermography both before and after EVT. Both wound healing and freedom from major amputation at the 6-month follow-up period were recorded. There were 61 patients in the healing group and 63 patients in the non-healing group, whereas the major amputation total was 14 patients. The mean pre- and post-EVT temperature of the foot was significantly higher in the healing group than in the non-healing group (30.78 °C vs 29.42 °C, P = .015; and 32.34 °C vs 30.96 °C, P = .004, respectively). DIFF2 was significantly lower in the non-healing group (-1.38 vs -0.90, P = .009). DIFF1 and DIFF2 were significantly lower in the amputation group (-1.85 °C vs -1.11 °C, P = .026; and -1.82 °C vs -1.08 °C, P = .004). Multivariate analysis showed that DIFF2 stood out as an independent predictor for freedom from major amputation (hazard ratio 0.51, P = .045). Receiver operating characteristic curve analysis showed a DIFF2 cut-off value of -1.30 °C, which best predicts freedom from major amputation.Plantar thermography is associated with wound healing and helps predict freedom from major amputation in CLI patients undergoing EVT.


Assuntos
Extremidades/cirurgia , Isquemia/cirurgia , Termografia/métodos , Idoso , Idoso de 80 Anos ou mais , Amputação , Procedimentos Endovasculares/métodos , Extremidades/fisiopatologia , Feminino , Humanos , Isquemia/complicações , Salvamento de Membro/métodos , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Termografia/estatística & dados numéricos
17.
Sensors (Basel) ; 20(19)2020 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-33023039

RESUMO

COVID-19, caused by SARS-CoV-2, has resulted in a global pandemic recently. With no approved vaccination or treatment, governments around the world have issued guidance to their citizens to remain at home in efforts to control the spread of the disease. The goal of controlling the spread of the virus is to prevent strain on hospitals. In this paper, we focus on how non-invasive methods are being used to detect COVID-19 and assist healthcare workers in caring for COVID-19 patients. Early detection of COVID-19 can allow for early isolation to prevent further spread. This study outlines the advantages and disadvantages and a breakdown of the methods applied in the current state-of-the-art approaches. In addition, the paper highlights some future research directions, which need to be explored further to produce innovative technologies to control this pandemic.


Assuntos
Técnicas de Laboratório Clínico/métodos , Infecções por Coronavirus/diagnóstico , Pulmão/diagnóstico por imagem , Pneumonia Viral/diagnóstico , Infecções por Coronavirus/diagnóstico por imagem , Infecções por Coronavirus/etiologia , Humanos , Pulmão/virologia , Pandemias , Pneumonia Viral/diagnóstico por imagem , Pneumonia Viral/etiologia , Termografia/métodos , Tomografia Computadorizada por Raios X , Ultrassonografia/métodos
18.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 1528-1531, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018282

RESUMO

Raynaud's phenomenon (RP) is a disease characterized by a transient ischemic process, in an exaggerated vascular response to cold or emotional stress. Thermography is a resource applied to support diagnosis of changes in the circulatory system. The aim of the study was to use the DistalDorsal Thermography Difference (DDD) in thermographic images to assess thermal behavior in individuals with secondary RP. The research was carried out in the period between 2018 and 2019. The sample means of the Distal-consisted of 44 individuals in a control group (Control) and 44 individuals in a pathological group (RP2). The participants, after acclimatization, were submitted to the cold stress protocol. The protocol consisted of immersing hands in a container of water at a temperature of 15°C for 60 seconds. The acquisition of thermographic images was performed at the pre-test moment and at the 1st, 3rd, 5th, 7th, 10th and 15th minute. At each time, the DDD values (of all fingers - minimum, maximum and sum) between the groups were analyzed. For statistical analysis, the independent t test and Cohen's d test were used. Regarding the results, there was a difference in relation to the rate of temperature recovery between the groups. The first group showed a rate of reheating just after the first minute subsequent to the cold stress test, while the RP2 group was unable to recover the temperature over 15 minutes. DDD, regardless of the selected criterion, proved to be a valid index for verifying the temperature gradient in the study with individuals identified with secondary RP.


Assuntos
Doença de Raynaud , Termografia , Temperatura Baixa , Dedos/irrigação sanguínea , Mãos , Humanos , Isquemia , Doença de Raynaud/diagnóstico
19.
Vestn Oftalmol ; 136(6): 15-18, 2020.
Artigo em Russo | MEDLINE | ID: mdl-33084274

RESUMO

PURPOSE: To determine the thermographic parameters of ocular surface tissues in various types of anti-glaucoma operations. MATERIAL AND METHODS: The study included 70 patients with glaucoma (140 eyes) and 28 patients (56 eyes) with cataract and planned phacoemulsification. All patients underwent dynamic infrared thermography of the eye surface to evaluate the aseptic inflammatory response before and after surgery. RESULTS: The increase in the temperature of the ocular surface tissues was longer after penetrating glaucoma surgery than after the non-penetrating type, which indicates a more prolonged inflammatory aseptic reaction in response to surgical intervention. CONCLUSION: The obtained results allow the development of a rational tactic of preoperative drug preparation and more effective postoperative management.


Assuntos
Catarata , Facoemulsificação , Humanos , Inflamação/diagnóstico , Inflamação/etiologia , Facoemulsificação/efeitos adversos , Período Pós-Operatório , Termografia
20.
J Med Eng Technol ; 44(8): 468-471, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32990119

RESUMO

COVID-19 pandemics required a reorganisation of social spaces to prevent the spread of the virus. Due to the common presence of fever in the symptomatic patients, temperature measurement is one of the most common screening protocols. Indeed, regulations in many countries require temperature measurements before entering shops, workplaces, and public buildings. Due to the necessity of providing rapid non-contact and non-invasive protocols to measure body temperature, infra-red thermometry is mostly used. Many countries are now facing the need to organise the return to school and universities in the COVID-19 era, which require solutions to prevent the risk of contagion between students and/or teachers and technical/administrative staff. This paper highlights and discusses some of the strengths and limitations of infra-red cameras, including the site of measurements and the influence of the environment, and recommends to be careful to consider such measurements as a single "safety rule" for a good return to normality.


Assuntos
Temperatura Corporal/fisiologia , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/prevenção & controle , Pandemias/prevenção & controle , Pneumonia Viral/epidemiologia , Pneumonia Viral/prevenção & controle , Instituições Acadêmicas , Betacoronavirus , Infecções por Coronavirus/diagnóstico , Infecções por Coronavirus/fisiopatologia , Febre/diagnóstico , Humanos , Raios Infravermelhos , Pneumonia Viral/diagnóstico , Pneumonia Viral/fisiopatologia , Termografia
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