keyword
MENU ▼
Read by QxMD icon Read
search

Skin blood flow

keyword
https://www.readbyqxmd.com/read/28927459/microarchitecture-of-the-tsetse-fly-proboscis
#1
Wendy Gibson, Lori Peacock, Rachel Hutchinson
BACKGROUND: Tsetse flies (genus Glossina) are large blood-sucking dipteran flies that are important as vectors of human and animal trypanosomiasis in sub-Saharan Africa. Tsetse anatomy has been well described, including detailed accounts of the functional anatomy of the proboscis for piercing host skin and sucking up blood. The proboscis also serves as the developmental site for the infective metacyclic stages of several species of pathogenic livestock trypanosomes that are inoculated into the host with fly saliva...
September 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28919754/preparation-of-coffee-oil-algae-oil-based-nanoemulsions-and-the-study-of-their-inhibition-effect-on-uva-induced-skin-damage-in-mice-and-melanoma-cell-growth
#2
Chu-Ching Yang, Chi-Feng Hung, Bing-Huei Chen
Coffee grounds, a waste by-product generated after making coffee, contains approximately 15% coffee oil which can be used as a raw material in cosmetics. Algae oil rich in docosahexaenoic acid (DHA) has been demonstrated to possess anticancer and anti-inflammation functions. The objectives of this study were to develop a gas chromatography-mass spectrometry (GC-MS) method for the determination of fatty acids in coffee oil and algae oil and prepare a nanoemulsion for studying its inhibition effect on ultraviolet A-induced skin damage in mice and growth of melanoma cells B16-F10...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28913282/the-versatility-of-cheek-rotation-flaps
#3
Kyung Pil Kim, Ho Seup Sim, Jun Ho Choi, Sam Yong Lee, Do Hun Lee, Seong Hwan Kim, Hong Min Kim, Jae Ha Hwang, Kwang Seog Kim
BACKGROUND: The cheek rotation flap has sufficient blood flow and large flap size and it is also flexible and easy to manipulate. It has been used for reconstruction of defects on cheek, lower eyelid, or medial and lateral canthus. For the large defects on central nose, paramedian forehead flap has been used, but patients were reluctant despite the remaining same skin tone on damaged area because of remaining scars on forehead. However, the cheek flap is cosmetically superior as it uses the adjacent large flap...
December 2016: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28904760/maintaining-genetic-integrity-of-coexisting-wild-and-domestic-populations-genetic-differentiation-between-wild-and-domestic-rangifer-with-long-traditions-of-intentional-interbreeding
#4
David G Anderson, Kjersti S Kvie, Vladimir N Davydov, Knut H Røed
This study investigates the genetic effect of an indigenous tradition of deliberate and controlled interbreeding between wild and domestic Rangifer. The results are interpreted in the context of conservation concerns and debates on the origin of domestic animals. The study is located in Northeastern Zabaĭkal'e, Russia at approximately 57 degrees North latitude. Blood and skin samples, collected from wild and domestic Rangifer, are analyzed for their mtDNA and microsatellite signatures. Local husbandry traditions are documented ethnographically...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28895317/assessment-of-a-noninvasive-optical-photoplethysmography-imaging-device-with-dynamic-tissue-phantom-models
#5
C Ikenna Nwafor, Kevin D Plant, Darlene R King, Brian P McCall, John J Squiers, Wensheng Fan, J Michael DiMaio, Jeffrey E Thatcher
Noncontact photoplethysmography (PPG) has been studied as a method to provide low-cost, noninvasive, two-dimensional blood oxygenation measurements and medical imaging for a variety of near-surface pathologies. To evaluate this technology in a laboratory setting, dynamic tissue phantoms were developed with tunable parameters that mimic physiologic properties of the skin, including blood vessel volume change, pulse wave frequency, and tissue scattering and absorption. Tissue phantoms were generated using an elastic tubing to represent a blood vessel where the luminal volume could be modulated with a pulsatile fluid flow...
September 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28892025/a-novel-approach-to-overcome-movement-artifact-when-using-a-laser-speckle-contrast-imaging-system-for-alternating-speeds-of-blood-microcirculation
#6
Shayan Bahadori, Tikki Immins, Thomas W Wainwright
The laser speckle contrast imager (LSCI) provides a powerful yet simple technique for measuring microcirculatory blood flow. Ideal for blood dynamic responses, the LSCI is used in the same way as a conventional Laser Doppler Imager (LDI). However, with a maximum skin depth of approximately 1 mm, the LSCI is designed to focus on mainly superficial blood flow. It is used to measure skin surface areas of up to 15 cm x 20 cm. The new technique introduced in this paper accounts for alternating speeds of microcirculations; i...
August 30, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28886806/high-frequency-ultrasound-examination-in-the-diagnosis-of-skin-cancer
#7
REVIEW
Robert L Bard
Ultrasound above 14 MHz images epidermis, dermis, and subcutaneous tissues in real time. Tumor depth is ascertained with B-mode. Three-dimensional imaging depicts nonpalpable, in-transit, and satellite lesions. Doppler blood flow technologies measure tumor neovascularity and map vascular structures. Three-dimensional Doppler histogram reconstruction measures tumor aggression and metastatic potential proportional to the percentage of malignant vessels. Subcutaneous investigation reveals nonpalpable metastatic disease and nodal basin lymphadenopathy...
October 2017: Dermatologic Clinics
https://www.readbyqxmd.com/read/28885211/postoperative-control-of-functional-muscle-flaps-for-facial-palsy-reconstruction-ultrasound-guided-tissue-monitoring-using-contrast-enhanced-ultrasound-ceus-and-ultrasound-elastography
#8
A Kehrer, V Mandlik, C Taeger, S Geis, L Prantl, E M Jung
BACKGROUND AND OBJECTIVES: Facial paralysis causes excruciating impairments including facial asymmetry, limited eye closure, oral incontinence and social dysfunction. Modern plastic surgical reconstructions render favorable results with well-perfused dynamic muscle flaps. Post-operative tissue monitoring is a critical determinant for success. Contrast-enhanced Ultrasound (CEUS) and elastography have proven superior properties to evaluate tissue perfusion in various organs. We evaluated their role for functional muscle flaps positioned at the sub-skin level in facial palsy patients...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28885202/reference-range-and-variability-of-laser-doppler-fluxmetry
#9
C Mrowietz, R P Franke, G Pindur, U Wolf, F Jung
The Laser Doppler technique, a noninvasive method to estimate skin blood flow (LDF), is frequently used in research and clinical routine [1]. Here, the measurements were carried out with a new Laser Doppler system, the DOPsystem, which allows to measure frequency spectra in four different frequency windows according to the velocities in venules (low velocity), capillaries (low to medium velocities), and in arteries (with high and very high velocities). However, the diagnostic reliability or the effectiveness of the LDF has not yet been evaluated sufficiently, which is indispensable, where medical diagnostics and therapy controls are concerned...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28877131/resolvin-d2-limits-secondary-tissue-necrosis-after-burn-wounds-in-rats
#10
Yoshitaka Inoue, Yuk Ming Liu, Masayuki Otawara, Isabel Chico Calero, Ahhyun Stephanie Nam, Yong-Ming Yu, Philip Chang, Kathryn L Butler, Rosalynn M Nazarian, Jeremy Goverman, Benjamin J Vakoc, Daniel Irimia
Secondary burn necrosis is the expansion and deepening of the original burn injury several days after injury. Limiting the extent of secondary burn necrosis may improve outcomes. In this study, we examined the ability of the lipid mediator of inflammation-resolution resolvin D2 (RvD2) and chromatin-lysing enzyme (DNase) to reduce secondary burn necrosis. Male Wistar rats were injured using a brass comb with 4 prongs heated in boiling water. This method created 2 parallel rows of 4 rectangular burned areas separated by 3 unburned interspaces...
August 31, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28873356/follicular-lymphoma-with-hyaline-vascular-castleman-like-features-analysis-of-6-cases-and-review-of-the-literature
#11
Sergio Pina-Oviedo, Roberto N Miranda, Pei Lin, John T Manning, L Jeffrey Medeiros
Follicular lymphoma (FL) with features reminiscent of hyaline-vascular Castleman disease (CD) is an unusual morphologic variant that may create diagnostic difficulties. To our knowledge, only 5 cases of this variant have been reported. We describe the clinicopathologic features of 6 cases including 2 men and 4 women with a median age of 63years (range, 41-77). Morphologically, all lymph node biopsy specimens showed at least a focal area of conventional FL; 4 cases showed neoplastic follicles with hyalinized blood vessels penetrating into germinal centers (lollipop-like lesions); 4 cases had interfollicular areas with increased vascular stroma, 2 cases showed small neoplastic follicles with prominent, onion skin-like mantle zones, and 1 case showed two or more germinal centers within follicles (twinning)...
September 2, 2017: Human Pathology
https://www.readbyqxmd.com/read/28870566/pre-and-postganglionic-vasomotor-dysfunction-causes-distal-limb-coldness-in-multiple-system-atrophy
#12
Kazumasa Shindo, Mai Tsuchiya, Yuta Ichinose, Kishin Koh, Takanori Hata, Nobuo Yamashiro, Fumikazu Kobayashi, Takamura Nagasaka, Yoshihisa Takiyama
BACKGROUND: The detailed pathophysiology of limb coldness in multiple system atrophy (MSA) is unknown. METHODS: We evaluated cutaneous vasomotor neural function in 18 MSA patients with or without limb coldness, and in 20 healthy volunteers as controls. We measured resting skin sympathetic nerve activity (SSNA) and spontaneous changes of the sympathetic skin response (SSR) and skin blood flow (skin vasomotor reflex: SVR), as well as SVR and reflex changes of SSNA after electrical stimulation...
September 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28868099/relationship-between-hemorheology-assessed-using-microchannel-array-flow-analyzer-and-kidney-function-in-hypertensive-patients
#13
Takashi Hitsumoto
BACKGROUND: Kidney function is known to be closely associated with the pathogenesis of hypertension. In contrast, hemorheology assessed using microchannel array flow analyzer (MC-FAN) has demonstrated the significance of cardiovascular risk factors in recent clinical studies. The present cross-sectional study aimed to clarify the relationship between hemorheology assessed by MC-FAN and kidney function in hypertensive patients from the perspective of primary prevention of cardiovascular events...
August 2017: Cardiology Research
https://www.readbyqxmd.com/read/28862474/tympanic-membrane-temperature-decreases-during-head-up-tilt-relation-to-frontal-lobe-oxygenation-and-middle-cerebral-artery-mean-blood-flow-velocity
#14
David Lorr, Anton Lund, Mats Fredrikson, Niels H Secher
INTRODUCTION: Changes in blood flow influence temperature of surrounding tissues. Since the internal carotid artery (ICA) and internal jugular vein (IJV) neighbor the tympanic membrane, changes in their blood flow most likely determine changes in tympanic membrane temperature (TMT). We sought to evaluate the relationship between changes during a head-up tilt (HUT) induced reduction in cerebral blood flow (CBF) and TMT. METHODS: Ten male subjects (age 19-28 years) underwent 50° HUT until presyncope...
September 1, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28857373/effect-of-direct-cold-atmospheric-plasma-dicap-on-microcirculation-of-intact-skin-in-a-controlled-mechanical-environment
#15
Thomas Borchardt, Jennifer Ernst, Andreas Helmke, Murat Tanyeli, Arndt F Schilling, Gunther Felmerer, Wolfgang Viöl
OBJECTIVE: The microcirculatory response of intact human skin to exposure with direct cold atmospheric plasma (diCAP) for different durations with a focus on the effect of implied mechanical pressure during plasma treatment was investigated. METHODS: Local relative hemoglobin, blood flow velocity, tissue oxygen saturation and blood flow were monitored non-invasively for up to 1 h in 1-2 mm depth by optical techniques, as well as temperature, pH values and moisture before and after skin stimulation...
August 31, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28856323/serratia-liquefaciens-infection-of-a-previously-excluded-popliteal-artery-aneurysm
#16
A Coelho, M Lobo, V Martins, R Gouveia, P Sousa, J Campos, R Augusto, N Coelho, A Canedo
INTRODUCTION: Popliteal artery aneurysms (PAAs) are rare in the general population, but they account for nearly 70% of peripheral arterial aneurysms. There are several possible surgical approaches including exclusion of the aneurysm and bypass grafting, or endoaneurysmorrhaphy and interposition of a prosthetic conduit. The outcomes following the first approach are favorable, but persistent blood flow in the aneurysm sac has been documented in up to one third of patients in the early post-operative setting...
2017: EJVES Short Rep
https://www.readbyqxmd.com/read/28855885/laser-doppler-assessment-of-vasomotor-axon-reflex-responsiveness-to-evaluate-neurovascular-function
#17
REVIEW
Marie Luise Kubasch, Anne Sophie Kubasch, Juliana Torres Pacheco, Sylvia J Buchmann, Ben Min-Woo Illigens, Kristian Barlinn, Timo Siepmann
The vasomotor axon reflex can be evoked in peripheral epidermal nociceptive C-fibers to induce local vasodilation. This neurogenic flare response is a measure of C-fiber functional integrity and therefore shows impairment in patients with small fiber neuropathy. Laser Doppler flowmetry (LDF) and laser Doppler imaging (LDI) are both techniques to analyze vasomotor small fiber function by quantifying the integrity of the vasomotor-mediated axon reflex. While LDF assesses the flare response following acetylcholine iontophoresis with temporal resolution at a single defined skin point, LDI records flare responses with spatial and temporal resolution, generating a two-dimensional map of superficial blood flow...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28854716/livebirth-and-utero-placental-insufficiency-in-papio-hamadryas-baboons-with-uterus-angiosome-perfused-by-bilateral-utero-ovarian-microsurgical-anastomoses-alone
#18
B Beran, K Arnolds, M Shockley, K Rivas, M Medina, P F Escobar, A Tzakis, T Falcone, M L Sprague, S Zimberg
STUDY QUESTION: Can the baboon uterus support a gestation to livebirth with an angiosome using microsurgically anastomosed utero-ovarian vessels and lacking uterine arteries and veins? SUMMARY ANSWER: Our angiosome model allows healthy livebirth albeit with risk of fetal growth restriction and stillbirth. WHAT IS KNOWN ALREADY: Uterine transplant can provide livebirth in humans, but requires a living donor to undergo a prolonged laparotomy for hysterectomy...
September 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28853122/temporospatial-angiogenisis-associated-gene-expression-profiles-in-rat-ischemic-skin-flaps
#19
Thomas M Johnson, Esra Toussaint-Barrett, Jose M Pizarro
OBJECTIVES: Emerging therapies designed to improve soft tissue flap survival include the use of angiogenic factors. However, endogenous expression patterns for these factors have not been characterized. The purpose of this study was to identify spatial and temporal variations in expression patterns of angiogenesis-associated genes in ischemic rat skin flaps. STUDY DESIGN: This is an observational animal study characterizing spatial and temporal angiogenesis associated gene expression patterns in rat ischemic skin flaps...
July 2017: U.S. Army Medical Department Journal
https://www.readbyqxmd.com/read/28822656/phenylephrine-infusion-impact-on-surgical-site-infections-after-lower-extremity-bypass-surgery
#20
Craig Curry, Jens Eldrup-Jorgensen, Janelle Richard, Michele C Siciliano, Wendy Y Craig
OBJECTIVE: Lower extremity bypass (LEB) operations have high rates of surgical site infections (SSI). Phenylephrine is a commonly used vasoconstrictor which may reduce skin blood flow and increase the likelihood of SSI in these patients. We studied the potential effect of phenylephrine infusion during LEB surgery on SSI. METHODS: LEB cases and their demographic data were identified through the Vascular Quality Initiative registry. SSI in this population was identified using the hospital epidemiology surveillance database...
August 16, 2017: Journal of Vascular Surgery
keyword
keyword
51712
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"