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https://www.readbyqxmd.com/read/28535540/development-of-a-synthetic-substrate-for-the-in-vitro-performance-testing-of-sunscreens
#1
Myriam Sohn, Camille Malburet, Laure Baptiste, Yvonne Prigl
PURPOSE: Polymethylmethacrylate (PMMA) plates generally used for the in vitro testing of sunscreens have failed to yield a satisfactory correlation between the sun protection factor (SPF) in vitro and that in vivo. In the present study, various polymers were investigated as alternative substrates to PMMA plates. PROCEDURES: In total, 14 polymers were tested in terms of ultraviolet (UV) transparency by transmission spectroscopy, and surface properties by contact angle measurement...
May 24, 2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/28535235/effect-of-cephalexin-plus-trimethoprim-sulfamethoxazole-vs-cephalexin-alone-on-clinical-cure-of-uncomplicated-cellulitis-a-randomized-clinical-trial
#2
Gregory J Moran, Anusha Krishnadasan, William R Mower, Fredrick M Abrahamian, Frank LoVecchio, Mark T Steele, Richard E Rothman, David J Karras, Rebecca Hoagland, Stephanie Pettibone, David A Talan
Importance: Emergency department visits for skin infections in the United States have increased with the emergence of methicillin-resistant Staphylococcus aureus (MRSA). For cellulitis without purulent drainage, β-hemolytic streptococci are presumed to be the predominant pathogens. It is unknown if antimicrobial regimens possessing in vitro MRSA activity provide improved outcomes compared with treatments lacking MRSA activity. Objective: To determine whether cephalexin plus trimethoprim-sulfamethoxazole yields a higher clinical cure rate of uncomplicated cellulitis than cephalexin alone...
May 23, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28534787/effect-of-waveform-on-tactile-perception-by-electrovibration-displayed-on-touch-screens
#3
Yasemin Vardar, Burak Guclu, Cagatay Basdogan
In this study, we investigated the effect of input voltage waveform on our haptic perception of electrovibration on touch screens. Through psychophysical experiments performed with eight subjects, we first measured the detection thresholds of electrovibration stimuli generated by sinusoidal and square voltages at various fundamental frequencies. We observed that the subjects were more sensitive to stimuli generated by square wave voltage than sinusoidal one for frequencies lower than 60 Hz. Using Matlab simulations, we showed that the sensation difference of waveforms in low fundamental frequencies occurred due to the frequency-dependent electrical properties of human skin and human tactile sensitivity...
May 16, 2017: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/28534393/simple-approach-to-high-performance-stretchable-heaters-based-on-kirigami-patterning-of-conductive-paper-for-wearable-thermotherapy-applications
#4
Nam-Su Jang, Kang-Hyun Kim, Sung-Hun Ha, Soo-Ho Jung, Hye Moon Lee, Jong-Man Kim
Recent efforts to develop stretchable resistive heaters open up the possibility for their use in wearable thermotherapy applications. Such heaters should have high electrothermal performance and stability to be used practically, and the fabrication must be simple, economic, reproducible, and scalable. Here we present a simple yet highly efficient way of producing high-performance stretchable heaters, which is based on a facile kirigami pattering (the art of cutting and folding paper) of a highly conductive paper for practical wearable thermotherapy...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28533933/negative-wound-pressure-therapy-is-safe-and-useful-in-pediatric-burn-patients
#5
Yanhan Ren, Philip Chang, Robert L Sheridan
INTRODUCTION: Negative Pressure Wound Therapy (NPWT) has proven to be a powerful tool in facilitating healing of difficult wounds of a variety of etiologies. The pediatric experience with NPWT has been limited due to concerns about vascular compression and pain associated with treatment. METHOD: A retrospective review was performed to evaluate the therapeutic effect of NPWT on children with difficult wounds due to burns or soft-tissue trauma. NPWT was instituted in the operating room under general anesthesia using a commercially available system...
2017: International Journal of Burns and Trauma
https://www.readbyqxmd.com/read/28533848/dermatology-in-ghana-a-retrospective-review-of-skin-disease-at-the-korle-bu-teaching-hospital-dermatology-clinic
#6
Brooke E Rosenbaum, Rebecca Klein, Paa Gyasi Hagan, Mark-Young Seadey, Naa Larteley Quarcoo, Rachel Hoffmann, Maria Robinson, Margaret Lartey, Marie C Leger
INTRODUCTION: Ghana is currently developing its provision of dermatology services. Epidemiologic studies of the skin diseases seen by Ghanaian dermatologists are needed to guide these efforts. We aimed to describe the skin conditions seen by and management practices of Ghanaian dermatologists in a specialized clinic. METHODS: We conducted a chart review of new patients presenting to the Korle Bu Teaching Hospital dermatology clinic during 2014. RESULTS: Among the 529 patients studied, 700 discrete diagnoses were made...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28530781/an-unusual-etiology-in-cold-injury-liquefied-petroleum-gas
#7
Emin Kapı, Mehmet Bozkurt, Gaye Taylan Filinte, Samet Vasfi Kuvat, Celal Alioğlu
Cold injury is a condition that causes reversible and irreversible damage when tissues are exposed to cold. This injury occurs due to various etiologies, and the most commonly observed ones include contact with liquefied petroleum gas (LPG) used in households, vehicles, and industry. LPG is a type of gas stored in liquid state under high pressure within cylinders. LPG contains a mixture of propane and butane gases. Direct contact of these gases with the tissues has the potential to cause metabolic, toxic, and respiratory damage...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28525582/challenges-in-the-estimation-of-the-annual-risk-of-mycobacterium-tuberculosis-infection-in-children-aged-under-5-years
#8
P Y Khan, J R Glynn, T Mzembe, D Mulawa, R Chiumya, A C Crampin, K Kranzer, K L Fielding
Accurate estimates of Mycobacterium tuberculosis (M.tb) infection in young children provide a critical indicator of on-going community M.tb transmission. Cross reactions due to infection with environmental mycobacteria and/or Bacille Calmette-Guérin (BCG) vaccination compromise the estimates derived from population-level tuberculin skin test surveys using traditional cut-off methods. Newer statistical approaches are prone to failure of model convergence, especially in settings where the prevalence of M.tb infection is low and environmental sensitisation is high...
May 19, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28520656/the-power-of-a-parent-s-touch-evaluation-of-reach-and-impact-of-a-targeted-evidence-based-youtube-video
#9
Marsha Campbell-Yeo, Justine Dol, Timothy Disher, Britney Benoit, Christine T Chambers, Kaitlyn Sheffield, Talia Boates, Denise Harrison, Brenda Hewitt, Krista Jangaard, Jennifer Stinson, Anna Taddio, Jennifer A Parker, Kim Caddell
Despite strong evidence that skin-to-skin contact and breast-feeding are effective pain-relieving interventions for infants undergoing painful procedures, they remain underutilized in clinical practice. Given the important contribution of parents, there is a need to find innovative ways to assist parents to become actively involved in their infant's care. We developed a YouTube video to disseminate evidence-based information on the effectiveness of skin-to-skin contact and breast-feeding for infant pain management...
May 17, 2017: Journal of Perinatal & Neonatal Nursing
https://www.readbyqxmd.com/read/28516256/-skin-diseases-associated-with-environmental-factors
#10
REVIEW
Vera Mahler
BACKGROUND: Multiple environmental exposures may derange the regulatory and repair mechanisms of the skin and lead to dermatological disease. OBJECTIVES: Provide an overview of non-allergic skin diseases associated with environmental factors. MATERIALS AND METHODS: Review of current scientific evidence for associations of non-allergic skin diseases with environmental exposures: irritation, chemicals, infection, UV-radiation, temperature. RESULTS: Predisposition (constitution e...
May 17, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/28514320/preoperative-warming-versus-no-preoperative-warming-for-maintenance-of-normothermia-in-women-receiving-intrathecal-morphine-for-cesarean-delivery-a-single-blinded-randomized-controlled-trial
#11
Judy Munday, Sonya Osborne, Patsy Yates, David Sturgess, Lee Jones, Edward Gosden
BACKGROUND: Rates of hypothermia for women undergoing spinal anesthesia for cesarean delivery are high and prevention is desirable. This trial compared the effectiveness of preoperative warming versus usual care among women receiving intrathecal morphine, which is thought to exacerbate perioperative heat loss. METHODS: A prospective, single-blinded, randomized controlled trial compared 20 minutes of forced air warming (plus intravenous fluid warming) versus no active preoperative warming (plus intravenous fluid warming) in 50 healthy American Society of Anesthesiologists graded II women receiving intrathecal morphine as part of spinal anesthesia for elective cesarean delivery...
May 12, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28513988/aquagenic-cutaneous-disorders
#12
REVIEW
Fang Wang, Yu-Kun Zhao, Ze-Yu Luo, Qian Gao, Wei Wu, Rashmi Sarkar, Di-Qing Luo
Aquagenic cutaneous disorders, which include aquagenic urticaria, aquagenic pruritus, and aquagenic acrokeratoderma, are a group of rare diseases characterized by skin lesions or discomfort induced by brief contact with water. Aquagenic urticaria is characterized by pruritic wheals that occur at the sites of water contact, either immediately or within minutes, and disappear within 30-60 min after water removal. Aquagenic pruritus presents with severe pruritus or a stinging, tingling, or burning sensation without any visible skin changes...
May 17, 2017: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/28513067/interventions-for-cutaneous-molluscum-contagiosum
#13
REVIEW
Johannes C van der Wouden, Renske van der Sande, Emma J Kruithof, Annet Sollie, Lisette Wa van Suijlekom-Smit, Sander Koning
BACKGROUND: Molluscum contagiosum is a common skin infection that is caused by a pox virus and occurs mainly in children. The infection usually resolves within months in people without immune deficiency, but treatment may be preferred for social and cosmetic reasons or to avoid spreading the infection. A clear evidence base supporting the various treatments is lacking.This is an update of a Cochrane Review first published in 2006, and updated previously in 2009. OBJECTIVES: To assess the effects of specific treatments and management strategies, including waiting for natural resolution, for cutaneous, non-genital molluscum contagiosum in people without immune deficiency...
May 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28511392/the-diagnostic-value-of-urine-lipoarabinomannan-lam-antigen-in-childhood-tuberculosis
#14
Agustin Iskandar, Erlin Nursiloningrum, Maimun Zulhaidah Arthamin, Ery Olivianto, Mas Slamet Chandrakusuma
INTRODUCTION: Diagnosis of Tuberculosis (TB) in children is difficult because the clinical presentation is not specific, the chest X-ray interpretation has low accuracy and sputum sample is difficult to obtain. Antigen detection test such as rapid urine LAM is a non-invasive alternative for diagnosing TB . Lipoarabinomannan (LAM) is the main component of M.tuberculosis cell wall. AIM: To determine the diagnostic value of urinary LAM antigen for diagnosis of childhood TB...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28509715/epidemic-of-isothiazolinone-allergy-in-north-america-prevalence-data-from-the-north-american-contact-dermatitis-group-2013-2014
#15
Matthew J Zirwas, Dathan Hamann, Erin M Warshaw, Howard I Maibach, James S Taylor, Denis Sasseville, Joel G DeKoven, Anthony F Fransway, C G Toby Mathias, Kathryn A Zug, Vincent A DeLeo, Joseph F Fowler, James G Marks, Melanie D Pratt, Donald V Belsito
BACKGROUND: Preservative sensitivity patterns evolve with changing use patterns in products. During the last decade, the use of methylisothiazolinone (MI) at higher concentrations in both leave-on and rinse-off products has significantly increased. This is the first North American Contact Dermatitis Group reporting cycle that includes both methylchloroisothiazolinone (MCI)/MI and MI data. OBJECTIVE: The aim of this study was to report the prevalence of isothiazolinone allergy (MCI/MI and MI) in the North American Contact Dermatitis Group patch-test population from January 1, 2013, to December 31, 2014...
May 2017: Dermatitis
https://www.readbyqxmd.com/read/28509523/skin-diseases-and-tattoos-a-five-year-experience
#16
Maddalena Napolitano, Matteo Megna, Milena Cappello, Caterina Mazzella, Cataldo Patruno
BACKGROUND: Decorative tattooing as a body art form underwent an exponential increase during the last two decades, particularly among teenagers and young adults. Consequently, the number of reported adverse reactions after tattooing has increased. The most frequent reported skin reactions to tattoo include infectious (bacterial, viral, fungal) or inflammatory (allergic contact dermatitis and granulomatous reaction) diseases. Moreover, tattoos can also induce the development of typical skin lesions of pre-existing dermatoses, a phenomenon known as isomorphism reactive or Koëbner phenomenon, which commonly occurs in patients with psoriasis, vitiligo, or lichen planus...
May 16, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/28507830/dermatitis-due-to-paederus-colombinus-report-of-an-epidemic-outbreak-of-68-cases-in-the-province-of-darien-panama
#17
Lorenzo Cáceres, Jose A Suarez, Carmela Jackman, Amanda Galbster, Roberto Miranda, Ingrid Murgas, Juan Pascale, Nestor Sosa, Alfonso J Rodriguez-Morales
INTRODUCTION: Contact dermatitis due to Paederus is a particular form of accident by animal contact. It is characterized by the sudden onset of erythematous and vesicular lesions with burning sensation on exposed areas of the body. The aim of this study was to describe the epidemiological and clinical findings of an outbreak of Paederus dermatitis in Panama. METHODS: Clinical and epidemiological findings of an outbreak of contact dermatitis caused by Paederus sp...
April 12, 2017: Curēus
https://www.readbyqxmd.com/read/28505718/mechanics-of-a-granular-skin
#18
Somnath Karmakar, Anit Sane, S Bhattacharya, Shankar Ghosh
Magic sand, a hydrophobic toy granular material, is widely used in popular science instructions because of its nonintuitive mechanical properties. A detailed study of the failure of an underwater column of magic sand shows that these properties can be traced to a single phenomenon: the system self-generates a cohesive skin that encapsulates the material inside. The skin, consisting of pinned air-water-grain interfaces, shows multiscale mechanical properties: they range from contact-line dynamics in the intragrain roughness scale, to plastic flow at the grain scale, all the way to sample-scale mechanical responses...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28500339/a-role-for-core-planar-polarity-proteins-in-cell-contact-mediated-orientation-of-planar-cell-division-across-the-mammalian-embryonic-skin
#19
Fazal Oozeer, Laura L Yates, Charlotte Dean, Caroline J Formstone
The question of how cell division orientation is determined is fundamentally important for understanding tissue and organ shape in both healthy or disease conditions. Here we provide evidence for cell contact-dependent orientation of planar cell division in the mammalian embryonic skin. We propose a model where the core planar polarity proteins Celsr1 and Frizzled-6 (Fz6) communicate the long axis orientation of interphase basal cells to neighbouring basal mitoses so that they align their horizontal division plane along the same axis...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28499812/modeling-of-the-interaction-between-grip-force-and-vibration-transmissibility-of-a-finger
#20
John Z Wu, Daniel E Welcome, Thomas W McDowell, Xueyan S Xu, Ren G Dong
It is known that the vibration characteristics of the fingers and hand and the level of grip action interacts when operating a power tool. In the current study, we developed a hybrid finger model to simulate the vibrations of the hand-finger system when gripping a vibrating handle covered with soft materials. The hybrid finger model combines the characteristics of conventional finite element (FE) models, multi-body musculoskeletal models, and lumped mass models. The distal, middle, and proximal finger segments were constructed using FE models, the finger segments were connected via three flexible joint linkages (i...
May 9, 2017: Medical Engineering & Physics
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