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https://www.readbyqxmd.com/read/29452029/intense-pulsed-light-is-effective-in-treating-postburn-hyperpigmentation-and-telangiectasia-in-chinese-patients
#1
Na Li, Juntao Han, Dahai Hu, Jing Cheng, Hongtao Wang, Yunchuan Wang, Xuekang Yang, Jiaqi Liu, Ting Li, Wenli Zhao
Intense pulsed light (IPL) has been used to treat postinflammatory hyperpigmentation and telangiectasia in Fitzpatrick type I -II skin. However, its therapeutic effects after superficial second-degree burns in Asian populations with Fitzpatrick type III-IV skin are uncertain. Thirty-five Han Chinese patients with facial or hand hyperpigmentation and telangiectasia due to second-degree fire burns received treatment with IPL. Each patient underwent 2-6 treatments over 3-5 weeks. The laser wavelength was 560-615 nm...
February 16, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29443068/design-and-characterization-methodology-for-efficient-wide-range-tunable-mems-filters
#2
Hasan Goktas
Here, we demonstrate the advantages of the laser Doppler vibrometer (LDV) over conventional techniques (the network analyzer), as well as the techniques to create an application-based microelectromechanical systems (MEMS) filter and how to use it efficiently (i.e., tuning the tuning-capability and avoiding both failure and stiction). LDV enables crucial measurements that are impossible with the network analyzer, such as higher mode detection (highly sensitive biosensor application) and resonance measurement for very small devices (fast prototyping)...
February 4, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29442245/retrobulbar-and-intraocular-blood-flow-in-anterior-ischaemic-optic-neuropathy-are-linked-to-the-functional-impairment
#3
David Kuerten, Matthias Fuest, Marion Bienert, Niklas Plange
PURPOSE: Evaluation of ocular haemodynamics in patients with acute non-arteritic anterior ischaemic optic neuropathy (NAION) by colour Doppler imaging and fluorescein angiography and correlation of blood flow parameters to visual field loss and visual acuity. METHODS: Blood flow velocities (peak systolic velocity (PSV), end-diastolic velocity (EDV)) of the ophthalmic artery (OA), central retinal artery (CRA) and nasal and temporal posterior ciliary arteries (PCAs) were measured via colour Doppler imaging...
February 13, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29439429/plane-wave-sh%C3%A2-piezoceramic-transduction-optimized-using-geometrical-parameters
#4
Guillaume Boivin, Martin Viens, Pierre Belanger
Structural health monitoring is a prominent alternative to the scheduled maintenance of safety-critical components. The nondispersive nature as well as the through-thickness mode shape of the fundamental shear horizontal guided wave mode (SH 0 ) make it a particularly attractive candidate for ultrasonic guided wave structural health monitoring. However, plane wave excitation of SH 0 at a high level of purity remains challenging because of the existence of the fundamental Lamb modes (A 0 and S 0 ) below the cutoff frequency thickness product of high-order modes...
February 10, 2018: Sensors
https://www.readbyqxmd.com/read/29439318/the-effect-of-three-different-surgical-techniques-for-colon-anastomosis-on-regional-postoperative-microperfusion-laser-doppler-flowmetry-study-in-pigs
#5
Milan Kaska, Slavomir Blazej, Zdenek Turek, Ales Ryska, Boris Jegorov, Vera Radochova, Jan Bezouska, Jiri Paral
BACKGROUND: The optimal surgical approach to reconnecting bowel ends safely after resection is of great importance. OBJECTIVES: This project is focused on assessment of the perianastomotic microcirculation quality in the short postoperative period when using three different anastomosis techniques in experimental animal. METHODS: The experimental study involved 27 young female domestic pigs divided into three subgroups of 9 animals according to each surgical method of anastomosis construction in the sigmoid colon region: by manual suture, by stapler, or by gluing...
2018: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29437419/nonreciprocal-localization-of-photons
#6
Hamidreza Ramezani, Pankaj K Jha, Yuan Wang, Xiang Zhang
We demonstrate that it is possible to localize photons nonreciprocally in a moving photonic lattice made by spatiotemporally modulating the atomic response, where the dispersion acquires a spectral Doppler shift with respect to the probe direction. A static defect placed in such a moving lattice produces a spatial localization of light in the band gap with a shifting frequency that depends on the direction of incident field with respect to the moving lattice. This phenomenon has an impact not only in photonics but also in broader areas such as condensed matter and acoustics, opening the doors for designing new devices such as compact isolators, circulators, nonreciprocal traps, sensors, unidirectional tunable filters, and possibly even a unidirectional laser...
January 26, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29436718/fetal-doppler-changes-one-week-after-endoscopic-equatorial-laser-for-twin-to-twin-transfusion-syndrome-a-longitudinal-study
#7
Nicola Persico, Francesco D'Ambrosi, Isabella Fabietti, Simona Boito, Elisa Aiello, Alessandro Bulfoni, Fabrizio Ciralli, Alessandra Kustermann, Fabio Mosca, Luigi Fedele
OBJECTIVE: To investigate sequential Doppler changes in donors and recipients before and one week after endoscopic laser for twin-to-twin transfusion syndrome (TTTS) and to examine factors that may be associated with such changes. METHODS: In TTTS pregnancies undergoing laser treatment, we examined fetal Doppler changes before and one week post-intervention. Intrauterine death rates and preoperative factors were analysed in relation to Doppler changes. RESULTS: Among 129 (85...
February 13, 2018: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29436080/fetoscopic-laser-photocoagulation-for-twin-twin-transfusion-syndrome
#8
Haruhiko Sago, Keisuke Ishii, Rika Sugibayashi, Katsusuke Ozawa, Masahiro Sumie, Seiji Wada
The aim of this study was to review fetoscopic laser photocoagulation (FLP), which ablates placental vascular anastomoses to treat twin-twin transfusion syndrome (TTTS). A review of studies reporting on the procedures, outcomes, complications and nonconventional applications of FLP for TTTS was conducted. FLP has been established as the primary treatment for monochorionic twin pregnancy associated with TTTS at 16-26 weeks. FLP is the only therapy that directly addresses the underlying pathophysiology. The recent technique modification of FLP, referred to as the 'Solomon technique', induces selective coagulation to connect the anastomoses ablation sites and has been introduced to reduce residual anastomoses...
February 13, 2018: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29430561/the-cgrp-receptor-antagonist-bibn4096-inhibits-prolonged-meningeal-afferent-activation-evoked-by-brief-local-k-stimulation-but-not-cortical-spreading-depression-induced-afferent-sensitization
#9
Jun Zhao, Dan Levy
Introduction: Cortical spreading depression (CSD) is believed to promote migraine headache by enhancing the activity and mechanosensitivity of trigeminal intracranial meningeal afferents. One putative mechanism underlying this afferent response involves an acute excitation of meningeal afferents by cortical efflux of K + and the ensuing antidromic release of proinflammatory sensory neuropeptides, such as calcitonin gene-related peptide (CGRP). Objectives: We sought to investigate whether (1) a brief meningeal K + stimulus leads to CGRP-dependent enhancement of meningeal afferent responses and (2) CSD-induced meningeal afferent activation and sensitization involve CGRP receptor signaling...
January 2018: Pain Reports (Baltimore, Md.)
https://www.readbyqxmd.com/read/29429820/direct-bone-conduction-stimulation-ipsilateral-effect-of-different-transducer-attachments-in-active-transcutaneous-devices
#10
Cristina Rigato, Sabine Reinfeldt, Bo Håkansson, Karl-Johan Fredén Jansson, Erik Renvall, Måns Eeg-Olofsson
Active transcutaneous bone conduction devices, where the transducer is implanted, are used for rehabilitation of hearing impaired patients by directly stimulating the skull bone. The transducer and the way it is attached to the bone play a central role in the design of such devices. The actual effect of varying the contact to bone has not been addressed yet. The aim of this study is therefore to compare how different attachment methods of the transducer to the bone for direct stimulation affect the ear canal sound pressure and vibration transmission to the ipsilateral cochlea...
January 31, 2018: Hearing Research
https://www.readbyqxmd.com/read/29428734/co-transplantation-of-exosomes-derived-from-hypoxia-preconditioned-adipose-mesenchymal-stem-cells-promotes-neovascularization-and-graft-survival-in-fat-grafting
#11
Yu-di Han, Yun Bai, Xin-Long Yan, Jing Ren, Quan Zeng, Xiao-Dong Li, Xue-Tao Pei, Yan Han
BACKGROUND: Adipose-derived stromal cells (ADSCs)-derived exosomes (ADSC-Exos) account for the proangiogenic potential of stem cell. This study aimed to investigate the effect of ADSC-derived exosomes (ADSC-Exos) on the survival in fat grafting. METHODS: A nude mouse model of subcutaneous fat grafting was adopted. Hypoxic preconditioned ADSC-Exos and ADSC-Exos were injected around the grafted tissue. The fat graft sample was weighed and examined by hematoxylin and eosin (H&E) staining and immunohistochemistry...
February 8, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29426350/effect-of-gelatin-polysuccinat-on-cerebral-oxygenation-and-microcirculation-in-a-porcine-haemorrhagic-shock-model
#12
Alexander Ziebart, Christian Möllmann, Andreas Garcia-Bardon, Jens Kamuf, Moritz Schäfer, Rainer Thomas, Erik K Hartmann
BACKGROUND: During early treatment of haemorrhagic shock maintenance of cerebral and end-organ oxygen supply by fluid resuscitation is mandatory. Gelatin-polysuccinat (GP) recently regained attention despite a still unclear risk profile and widely unknown effects on cerebral and peripheral microcirculation. This study investigates the effects of GP versus balanced electrolyte solution (BEL) with focus on cerebral regional oxygen saturation and peripheral microcirculation in a porcine haemorrhagic shock model...
February 9, 2018: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/29424350/the-contribution-of-noradrenergic-nerves-to-the-vasoconstrictor-response-during-local-cooling-of-leg-and-forearm-skin-in-humans
#13
Ramzi A Al-Horani, Mukhallad Mohammad
This study investigated the noradrenergic contribution during the cutaneous vasoconstrictor response to local cooling in the leg and forearm. On each limb, one site was perfused with Yoh/Prop to block the postsynaptic adrenoceptors and another with Lactated Ringer's (control) using microdialysis. Blood flow was measured by Laser-Doppler flowmetry (LDF). Cutaneous vascular conductance (CVC) was calculated as LDF units divided by the mean arterial pressure. After baseline measures, skin was locally cooled to 24°C...
January 2018: General Physiology and Biophysics
https://www.readbyqxmd.com/read/29423944/impact-of-mon2-monocyte-platelet-aggregates-in-humancoronary-artery-disease
#14
Richard A Brown, Gregory Y H Lip, Chetan Varma, Eduard Shantsila
INTRODUCTION: Monocyte-platelet aggregates (MPAs) form when Mon1, Mon2 or Mon3 monocyte subsets adhere to platelets. They are pathophysiologically linked to coronary artery disease (CAD). However, their individual roles in the occurrence of diffuse CAD remain unknown. METHODS: Peripheral blood from 50 patients with diffuse CAD, 40 patients with focal CAD and 50 age-matched patients with normal coronary arteries was analysed by flow cytometry to quantify MPAs associated with individual monocyte subsets...
February 9, 2018: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29422233/nerve-function-varies-with-hemoglobin-a1c-in-controls-and-type-2-diabetes
#15
Alon Abraham, Carolina Barnett, Hans D Katzberg, Leif E Lovblom, Bruce A Perkins, Vera Bril
AIMS: To determine the cross-sectional threshold at which hemoglobin A1c (HbA1c) is associated with polyneuropathy in healthy controls, and the values associated with the most pronounced decline in nerve function in patients with diabetes. METHODS: We used data from a cross-sectional cohort study of healthy controls and type 2 diabetes patients assessed between November 2010 and May 2013. Healthy controls and patients with diabetes were compared at different HbA1c ranges: <5...
December 21, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/29421897/lamb-dip-crds-of-highly-saturated-transitions-of-water-near-1-4-%C3%AE-m
#16
S Kassi, T Stoltmann, M Casado, M Daëron, A Campargue
Doppler-free saturated-absorption Lamb dips were measured at sub-Pa pressures on rovibrational lines of H216O near 7180 cm-1, using optical feedback frequency stabilized cavity ring-down spectroscopy. The saturation of the considered lines is so high that at the early stage of the ring down, the cavity loss rate remains unaffected by the absorption. By referencing the laser source to an optical frequency comb, transition frequencies are determined down to 100 Hz precision and kHz accuracy. The developed setup allows resolving highly K-type blended doublets separated by about 10 MHz (to be compared to a HWHM Doppler width on the order of 300 MHz)...
February 7, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29417191/-new-clinical-applications-for-laser-doppler-vibrometry-in-otology
#17
REVIEW
T Strenger, M Brandstetter, T Stark, F Böhnke
BACKGROUND: An instrument to measure vibration in the middle ear needs to be sensitive enough to detect displacement on a nanometer scale, yet not affect the vibration itself. Numerous techniques have been described in the literature, but laser Doppler vibrometry (LDV) has nowadays become established as the standard method in hearing research. OBJECTIVE: This article aims to present possible clinical applications of an LDV system in otology. MATERIALS AND METHODS: A commercially available single-point vibrometer was used...
February 7, 2018: HNO
https://www.readbyqxmd.com/read/29416372/effect-of-bupivacaine-and-adjuvant-drugs-for-regional-anesthesia-on-nerve-tissue-oximetry-and-nerve-blood-flow
#18
Thomas Wiesmann, Stefan Müller, Hans-Helge Müller, Hinnerk Wulf, Thorsten Steinfeldt
Background: Nerve blood flow has a critical role in acute and chronic pathologies in peripheral nerves. Influences of local anesthetics and adjuvants on tissue perfusion and oxygenation are deemed as relevant factors for nerve damage after peripheral regional anesthesia. The link between low tissue perfusion due to local anesthetics and resulting tissue oxygenation is unclear. Methods: Combined tissue spectrophotometry and laser-Doppler flowmetry were used to assess nerve blood flow in 40 surgically exposed median nerves in pigs, as well as nerve tissue oximetry for 60 min...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29415014/buttock-tissue-response-to-loading-in-men-with-spinal-cord-injury
#19
Sharon Eve Sonenblum, Stephen H Sprigle
OBJECTIVE/BACKGROUND: Despite the fact that most people with a spinal cord injury who use a wheelchair for mobility are considered at-risk for pressure ulcer (PrU) development, there still exists a spectrum of risk amongst this group. Efforts to differentiate risk level would benefit from clinical tools that can measure or predict the buttocks response to loading. Therefore, the goal of this study was to identify how tissue compliance and blood flow were impacted by clinically-measurable risk factors in young men with SCI...
2018: PloS One
https://www.readbyqxmd.com/read/29409385/evidence-for-increase-in-finger-blood-flow-evaluated-by-laser-doppler-flowmetry-following-iloprost-infusion-in-patients-with-systemic-sclerosis-a-week-long-observational-longitudinal-study
#20
C Rotondo, M Nivuori, A Chialà, E Praino, M Matucci Cerinic, M Cutolo, G Lapadula, F Iannone
OBJECTIVES: Iloprost plays an important role in the treatment of Raynaud's phenomenon (RP), but has transient vasodilatory effects owing to its very short half-time. We aimed to evaluate short- and medium-term haemodynamic effects of iloprost by measuring dorsal finger microvessel blood flow using laser Doppler flowmetry (LDF), in patients with RP associated with systemic sclerosis (SSc). METHOD: In 24 consecutive SSc patients with RP (disease duration 10.5 ± 1...
February 7, 2018: Scandinavian Journal of Rheumatology
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