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https://read.qxmd.com/read/30896915/surface-enhanced-resonance-raman-scattering-guided-brain-tumor-surgery-showing-prognostic-benefit-in-rat-models
#1
Limei Han, Wenjia Duan, Xinwei Li, Cong Wang, Ziyi Jin, Yuting Zhai, Chong Cao, Luo Chen, Wenjing Xu, Ying Liu, Yong-Yan Bi, Jianfeng Feng, Ying Mao, Qi Yue, Xiao-Yong Zhang, Cong Li
Glioma is the most frequent form of malignant brain tumors. Surgical debulking is a major strategy for glioma treatment. However, there is a great challenge for the neurosurgeons to intra-operatively identify the true margins of glioma due to its infiltrative nature. Tumor residues or microscopic satellite foci left in resection bed are the main reasons leading to early recurrence as well as poor prognosis. In this study, a surface-enhanced resonance Raman scattering (SERRS) probe was developed to intra-operatively guide glioma resection...
March 21, 2019: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/30896099/infrared-spectral-characteristics-of-electrical-injuries-on-swine-skin-caused-by-different-voltages-based-on-machine-learning-algorithms
#2
H W Dong, W Li, S Y Li, K F Deng, N Cao, Y W Luo, Q R Sun, H C Lin, J F Huang, N G Liu, P Huang
OBJECTIVES: To explore infrared spectrum characteristics of different voltages induced electrical injuries on swine skin by using Fourier transform infrared-microspectroscopy (FTIR-MSP) combined with machine learning algorithms, thus to provide a reference to the identification of electrical skin injuries caused by different voltages. METHODS: Electrical skin injury model was established on swines. The skin was exposed to 110 V, 220 V and 380 V electric shock for 30 s and then samples were took, with normal skin tissues around the injuries as the control...
June 2018: Fa Yi Xue za Zhi
https://read.qxmd.com/read/30894584/detecting-changes-in-facial-temperature-induced-by-a-sudden-auditory-stimulus-based-on-deep-learning-assisted-face-tracking
#3
Saurabh Sonkusare, David Ahmedt-Aristizabal, Matthew J Aburn, Vinh Thai Nguyen, Tianji Pang, Sascha Frydman, Simon Denman, Clinton Fookes, Michael Breakspear, Christine C Guo
Thermal Imaging (Infrared-Imaging-IRI) is a promising new technique for psychophysiological research and application. Unlike traditional physiological measures (like skin conductance and heart rate), it is uniquely contact-free, substantially enhancing its ecological validity. Investigating facial regions and subsequent reliable signal extraction from IRI data is challenging due to head motion artefacts. Exploiting its potential thus depends on advances in analytical methods. Here, we developed a novel semi-automated thermal signal extraction method employing deep learning algorithms for facial landmark identification...
March 18, 2019: Scientific Reports
https://read.qxmd.com/read/30870816/association-between-physiological-stress-and-skin-temperature-response-after-a-half-marathon
#4
Alejandro Pérez-Guarner, Jose Ignacio Priego Quesada, Fran Oficial-Casado, Rosa María Cibrian Ortiz de Anda, Felipe P Carpes, Rosario Salvador Palmero
OBJECTIVE: The objective of this study was to determine the association between skin temperature response and the physiological stress after a half marathon. APPROACH: Seventeen runners were measured 48 h before, 24 h before, 24 h after and 48 h after completing a half marathon. The measurements on each day of testing included blood markers (creatine kinase [CK] and glutamate oxaloacetate transaminase [GOT]), perception of pain and fatigue (using a visual analogue scale), skin temperature (using infrared thermography), and jump performance (using countermovement jump test)...
March 14, 2019: Physiological Measurement
https://read.qxmd.com/read/30869856/smart-patterned-surface-with-dynamic-wrinkles
#5
Honghao Hou, Jie Yin, Xuesong Jiang
Patterned surfaces are fundamentally important to physics, chemistry, materials, and biology science, endowing significant functions and thus bearing broad and fantastic applications whether in natural or man-made events. Among the various methods for patterning surfaces, wrinkling or buckling offers a powerful alternative to prepare surface patterns because of its spontaneous nature, versatility, easy preparation in large-scale, and capability to be responsive to various stimuli. In particular, patterned surfaces with dynamic wrinkles can tailor the encoded surface properties on demand and can provide a promising alternative for smart surfaces, which has potential for wide applications in enhanced and tunable optical or photoelectric devices, responsive microstructures, switchable wettability, smart adhesion and friction, and so on...
March 14, 2019: Accounts of Chemical Research
https://read.qxmd.com/read/30865641/evaluation-of-the-temperature-of-posterior-lower-limbs-skin-during-the-whole-body-vibration-measured-by-infrared-thermography-cross-sectional-study-analysis-using-linear-mixed-effect-model
#6
Eloá Moreira-Marconi, Marcia Cristina Moura-Fernandes, Patrícia Lopes-Souza, Ygor Teixeira-Silva, Aline Reis-Silva, Renata Marques Marchon, Eliane de Oliveira Guedes-Aguiar, Laisa Liane Paineiras-Domingos, Danúbia da Cunha de Sá-Caputo, Danielle Soares Morel, Carla Fontoura Dionello, Sérgio Oliveira De-Carvalho, Mario José Dos Santos Pereira, Arlete Francisca-Santos, Gefferson Silva-Costa, Marcio Olímpio-Souza, Tânia Regina Lemos-Santos, Nasser Ribeiro Asad, Vinicius Layter Xavier, Redha Taiar, Anelise Sonza, Adérito Seixas, Darryl J Cochrane, Mario Bernardo-Filho
BACKGROUND: Whole body vibration exercise (WBVE) has been shown to improve muscular strength and power, and increase peripheral blood flow. The aim of this study was to evaluate the behavior of the skin temperature (Tsk) on regions of the lower limbs from an acute bout of WBVE. METHODS AND FINDINGS: Cross-sectional study approved by local ethics committee (Certificado de Apresentação para Apreciação Ética-CAAE-19826413.8.0000.5259) and Trial registration (Registro Brasileiro de Ensaios Clínicos-REBEC-RBR-738wng)...
2019: PloS One
https://read.qxmd.com/read/30864480/modern-technology-derived-normative-values-for-cerebral-tissue-oxygen-saturation-in-adults
#7
Christopher T Eyeington, Paolo Ancona, Eduardo A Osawa, Salvatore L Cutuli, Glenn M Eastwood, Rinaldo Bellomo
Modern near-infrared spectroscopy technology is increasingly adopted to measure cerebral tissue oxygen saturation. However, the normal range of cerebral tissue oxygen saturation in adults with such technology is unknown. We sought to measure cerebral tissue oxygen saturation in healthy volunteers using the novel O3 Regional Oximetry® device (Masimo Corporation, Irvine, CA, USA) and assess its relationship with key physical and haemodynamic characteristics. For ≥5 minutes, we continuously recorded cerebral tissue oxygen saturation, pulse oximetry, cardiac index and mean arterial pressure...
January 2019: Anaesthesia and Intensive Care
https://read.qxmd.com/read/30857569/motion-capture-system-to-assess-intraoperative-staff-movements-and-door-openings-impact-on-surrogates-of-the-infectious-risk-in-surgery
#8
Gabriel Birgand, Christine Azevedo, Stephane Rukly, Roger Pissard-Gibollet, Gaëlle Toupet, Jean-François Timsit, Jean-Christophe Lucet
OBJECTIVES: We longitudinally observed and assessed the impact of the operating room (OR) staff movements and door openings on surrogates of the exogenous infectious risk using a new technology system. DESIGN AND SETTING: This multicenter observational study included 13 ORs from 10 hospitals, performing planned cardiac and orthopedic surgery (total hip or knee replacement). Door openings during the surgical procedure were obtained from data collected by inertial sensors fixed on the doors...
March 12, 2019: Infection Control and Hospital Epidemiology
https://read.qxmd.com/read/30854275/the-ocean-s-skin-layer-in-the-tropics
#9
Oliver Wurl, William M Landing, Nur Ili Hamizah Mustaffa, Mariana Ribas-Ribas, Carson Riggs Witte, Christopher J Zappa
We provide a large data set on salinity anomalies in the ocean's skin layer together with temperature anomalies and meteorological forcing. We observed an average salinity anomaly of 0.40 ± 0.41 practical salinity unity ( n  = 23,743), and in 83% of the observations the salinity anomaly was positive; that is, the skin layer was more saline. Temperature anomalies determined by an infrared camera were -0.23 ± 0.28 °C (upper 20-μm layer in reference to nominal 1-mm depth) and slightly warmer with -0...
January 2019: Journal of Geophysical Research. Oceans
https://read.qxmd.com/read/30848203/electrospun-transdermal-patch-for-contraceptive-hormone-delivery
#10
Mohammad Mofidfar, Mark R Prausnitz
BACKGROUND: A transdermal patch for delivery of levonorgestrel (LNG) can be used for long-acting contraception. OBJECTIVE: In this study, we designed and characterized a patch made of nonwoven electrospun microfibers comprised of polycaprolactone (PCL) encapsulating LNG for slow release in a mineral oil matrix. METHODS AND RESULTS: Scanning electron microscopy showed uniform, randomly oriented PCL fibers with large interconnected voids filled with mineral oil...
March 7, 2019: Current Drug Delivery
https://read.qxmd.com/read/30843466/airbag-deployment-infrared-thermography-and-evaluation-of-thermal-damage
#11
Ehsan Shakouri, Alimohammad Mobini
The performance of airbag and its deployment are based on a fast exothermic-chemical reaction. The hot gas resulting from the chemical reaction which results in airbag deployment can cause thermal damage and skin burning for the car passenger. The thermal burns due to airbags are of two types: burns due to direct contact with the airbag surface and burns resulting from exposure to the hot gas leaving the deflation vents of the airbag. In this research, for experimental study of the burns resulting from exposure of the skin to airbag, using infrared thermography, the extent of temperature rise of the airbag surface was detected and measured from the zero moment of its inflation...
March 7, 2019: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://read.qxmd.com/read/30843432/development-of-a-closed-loop-stimulator-for-laryngeal-reanimation-part-1-devices
#12
David M Otten, James B Kobler, Robert E Hillman, Steven M Zeitels, Kevin P Seitter, James T Heaton
OBJECTIVE: The goal of this work was to create implantable stimulator systems that could be used in animal experiments on laryngeal paralysis, including "closed-loop" stimulation of impaired muscles triggered by electromyographic (EMG) potentials from healthy muscles. STUDY DESIGN: Iterative device design and testing. METHODS: A series of microcontroller-based implantable devices were built that incorporated increasingly sophisticated features for stimulation, EMG recording, and communication across the skin...
March 2019: Annals of Otology, Rhinology, and Laryngology
https://read.qxmd.com/read/30838792/dressings-cut-to-shape-alleviate-facial-tissue-loads-while-using-an-oxygen-mask
#13
Lea Peko Cohen, Zehava Ovadia-Blechman, Oshrit Hoffer, Amit Gefen
Non-invasive ventilation (NIV) masks are commonly used for respiratory support where intubation or a surgical procedure can be avoided. However, prolonged use of NIV masks involves risk to facial tissues, which are subjected to sustained deformations caused by tightening of the mask and microclimate conditions. The risk of developing such medical device-related pressure ulcers can be reduced by providing additional cushioning at the mask-face interface. In this work, we determined differences in facial tissue stresses while using an NIV mask with versus without using dressing cuts (Mepilex Lite; Mölnlycke Health Care, Gothenburg, Sweden)...
March 5, 2019: International Wound Journal
https://read.qxmd.com/read/30814418/roasted-barley-extract-mugicha-containing-cyclo-d-phe-l-pro-prevents-a-decrease-in-skin-temperature-in-cold-conditions-a-randomized-double-blind-placebo-controlled-crossover-study
#14
Hiroshi Ashigai, Mai Mizutani, Emiko Ikeshima, Keiko Nakashima, Yoshimasa Taniguchi, Yasuko Matsukura, Hiroaki Yajima
Roasted barley extract (RBE) is a traditional Japanese beverage. Previously, we reported the effects of RBE containing cyclo(d-Phe-l-Pro) on blood flow in animals and humans and investigated rapid skin temperature recovery from cold-water immersion in women. The present randomized, double-blind study investigated the effects of RBE containing cyclo(d-Phe-l-Pro) on men's and women's skin temperature in excessively air-cooled conditions. Participants felt cold in the test room (25.5±0.5ºC). They ingested an RBE or placebo beverage and remained in the air-conditioned room for 100 min...
2019: Journal of Nutritional Science and Vitaminology
https://read.qxmd.com/read/30804143/infrared-and-raman-spectroscopic-studies-of-molecular-disorders-in-skin-cancer
#15
Jane Anastassopoulou, Maria Kyriakidou, Efthymia Malesiou, Michael Rallis, Theophile Theophanides
AIM: To investigate the molecular structural disorders of cancerous skin. MATERIALS AND METHODS: Human malignant melanoma and basal cell carcinoma biopsies were used for the investigation. Fourier transform infrared (FT-IR), Raman spectroscopy, and scanning electron microscopy were utilized. Spectral differences between healthy, basal cell carcinoma and melanoma tissues were recorded. RESULTS: The FT-IR bands of vas CH2 , vs CH2 and Raman vs CH3 of cell membrane lipids were increased in intensity in melanoma due to an increased lipophilic environment...
March 2019: In Vivo
https://read.qxmd.com/read/30800613/effect-of-copper-nanoparticles-on-physico-chemical-properties-of-chitosan-and-gelatin-based-scaffold-developed-for-skin-tissue-engineering-application
#16
Shikha Kumari, Bhisham Narayan Singh, Pradeep Srivastava
Development of new and effective scaffold continues to be an area of intense research in skin tissue engineering. The objective of this study was to study the effect of copper nanoparticles over physico-chemical properties of the chitosan and gelatin composite scaffolds for skin tissue engineering. The copper-doped scaffolds were prepared using freeze-drying method. Chitosan and gelatin were taken in varied composition with 0.01%, 0.02%, and 0.03% Cu nanoparticles. The physico-chemical properties of the copper nanoparticles and the scaffolds were analyzed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy...
March 2019: 3 Biotech
https://read.qxmd.com/read/30800525/physiological-and-structural-characterization-of-human-skin-in-vivo-using-combined-photothermal-radiometry-and-diffuse-reflectance-spectroscopy
#17
Nina Verdel, Ana Marin, Matija Milanič, Boris Majaron
In this proof-of-concept study we combine two optical techniques to enable assessment of structure and composition of human skin in vivo: Pulsed photothermal radiometry (PPTR), which involves measurements of transient dynamics in mid-infrared emission from sample surface after exposure to a light pulse, and diffuse reflectance spectroscopy (DRS) in visible part of the spectrum. The analysis involves simultaneous fitting of measured PPTR signals and DRS with corresponding predictions of a Monte Carlo model of light-tissue interaction...
February 1, 2019: Biomedical Optics Express
https://read.qxmd.com/read/30797865/3d-printed-chitosan-dressing-crosslinked-with-genipin-for-potential-healing-of-chronic-wounds
#18
Forough Hafezi, Nikolaos Scoutaris, Dennis Douroumis, Joshua Boateng
Recently, various additive manufacturing (3D printing) approaches have been employed to fabricate dressings such as film scaffolds that possess well defined architecture and orientation at the micro level. In this study, crosslinked chitosan (CH) based film matrices were prepared using 3D printing with genipin (GE) as a crosslinker, with glycerol (GLY) and poly ethylene glycol (PEG) as plasticiser. The 3D printed films were functionally characterized (tensile, fluid handling, mucoadhesion, drug dissolution, morphological properties and cell viability as well physico-chemical characterization using scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction...
February 21, 2019: International Journal of Pharmaceutics
https://read.qxmd.com/read/30797808/preparation-and-characterisation-of-a-novel-silk-fibroin-hyaluronic-acid-sodium-alginate-scaffold-for-skin-repair
#19
Wei Yang, Hongjie Xu, Yong Lan, Qiyu Zhu, Yu Liu, Shaoshan Huang, Shengjun Shi, Andrei Hancharou, Bing Tang, Rui Guo
To mimic the natural structure of tissue extracellular matrix, a novel silk fibroin (SF)/hyaluronic acid (HA)/sodium alginate (SA) composite scaffold (92% in porosity) was prepared by freeze-drying. Fourier-transform infrared spectroscopy and Raman spectra indicated interactions among SF, HA, and SA molecules. Scanning electron microscopy showed that the prepared SF/HA/SA scaffold had soft, elastic characteristics, with an average pore diameter of 93 μm. Mechanical property, thermogravimetric analyses and degradation results indicated that the SF/HA/SA scaffold had good physical stability in body fluid and mechanical movement-related environments...
February 21, 2019: International Journal of Biological Macromolecules
https://read.qxmd.com/read/30791407/a-pilot-study-of-infrared-thermography-based-assessment-of-local-skin-temperature-response-in-overweight-and-lean-women-during-oral-glucose-tolerance-test
#20
Bushra Jalil, Valentina Hartwig, Davide Moroni, Ovidio Salvetti, Antonio Benassi, Zunera Jalil, Laura Pistoia, Tommaso Minutoli Tegrimi, Alfredo Quinones-Galvan, Giorgio Iervasi, Antonio L'Abbate, Letizia Guiducci
Obesity is recognized as a major public health issue, as it is linked to the increased risk of severe pathological conditions. The aim of this pilot study is to evaluate the relations between adiposity (and biophysical characteristics) and temperature profiles under thermoneutral conditions in normal and overweight females, investigating the potential role of heat production/dissipation alteration in obesity. We used Infrared Thermography (IRT) to evaluate the thermogenic response to a metabolic stimulus performed with an oral glucose tolerance test (OGTT)...
February 19, 2019: Journal of Clinical Medicine
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