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Microcirculation

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https://www.readbyqxmd.com/read/28934683/histological-transformations-of-the-dental-pulp-as-possible-indicator-of-post-mortem-interval-a-pilot-study
#1
Patricio A Carrasco, Claudia I Brizuela, Ismael A Rodriguez, Samuel Muñoz, Marianela E Godoy, Carolina Inostroza
BACKGROUND: The correct estimation of the post mortem interval (PMI) can be crucial on the success of a forensic investigation. Diverse methods have been used to estimate PMI, considering physical changes that occur after death, such as mortis algor, livor mortis, among others. Degradation after death of dental pulp is a complex process that has not yet been studied thoroughly. It has been described that pulp RNA degradation could be an indicator of PMI, however this study is limited to 6 days...
September 11, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28930919/2017-military-supplement-mini-review-perfluorocarbons-oxygen-transport-and-microcirculation-in-low-flow-states-in-vivo-and-in-vitro-studies
#2
Ivo P Torres Filho
The in vivo study of microvascular oxygen transport requires accurate and challenging measurements of several mass transfer parameters. Although recommended, blood flow and oxygenation are typically not measured in many studies where treatments for ischemia are tested. Therefore, the aim of this communication is to briefly review cardinal aspects of oxygen transport, and the effects of perfluorocarbon treatment on blood flow and oxygenation based mostly on studies performed in our laboratory. Since physiologically relevant events in oxygen transport take place at the microvascular level, we implemented the phosphorescence quenching technique coupled with non-invasive intravital videomicroscopy for quantitative evaluation of these events in vivo...
September 19, 2017: Shock
https://www.readbyqxmd.com/read/28930572/immune-response-to-systemic-inflammation-in-the-intestinal-microcirculation
#3
Taylor Thorburn, Maral Aali, Christian Lehmann
Systemic inflammation is characterized by acute or chronic dysregulation of the host immune response. The intestine plays an important role in systemic inflammation. Disturbances in the intestinal microcirculation due to infiltration of immune cells during systemic inflammation can increase bacterial translocation from the gut to the circulation and aggravate the pathological condition. Therefore, the intestinal microcirculation is relevant with respect to two aspects - as pathophysiological trigger and therapeutic target in systemic inflammation...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28922147/microcirculation-research-in-community-hospitals-challenges-and-chances
#4
Hartmut Kern, Nivin Sharawi, Joel Sardinha, Christian Lehmann
No abstract text is available yet for this article.
September 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28922146/preliminary-clinical-evaluation-of-automated-analysis-of-the-sublingual-microcirculation-in-the-assessment-of-patients-with-septic-shock-comparison-of-automated-versus-semi-automated-software
#5
Nivin Sharawy, Ahmed Mukhtar, Sufia Islam, Reham Mahrous, Hassan Mohamed, Mohamed Ali, Amr Abd El Hakeem, Osama Hossny, Amera Refaa, Ahmed Saka, Vladimir Cerny, Sara Whynot, Ron George, Christian Lehmann
INTRODUCTION: The outcome of patients in septic shock has been shown to be related to changes within the microcirculation. Modern imaging technologies are available to generate high resolution video recordings of the microcirculation in humans. However, evaluation of the microcirculation is not yet implemented in the routine clinical monitoring of critically ill patients. This is mainly due to large amount of time and user interaction required by the current video analysis software. The aim of this study was to validate a newly developed automated method (CCTools®) for microcirculatory analysis of sublingual capillary perfusion in septic patients in comparison to standard semi-automated software (AVA3®)...
September 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28922145/new-developments-in-clinical-microcirculation-imaging
#6
Christian Lehmann
No abstract text is available yet for this article.
September 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28918509/effects-of-tetramethylpyrazine-phosphate-on-pancreatic-islet-microcirculation-in-sd-rats
#7
X Xu, L Wu, Z Q Lu, P Xia, X P Zhu, X Gao
PURPOSES: Abnormal islet microcirculation impetus the insulin production and accelerates progression of Type 1 and 2 diabetes. In this study, we investigated whether tetramethylpyrazine phosphate (TMPP), a vasoactive substance, could regulate the islet microcirculation and insulin concentration and improve glycaemia in SD rats. METHODS: SD rats were randomly divided into two groups, the control and TMPP groups. Each group was further divided into three subgroups according to the intravenous injection of either saline, 15 or 30% glucose...
September 16, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28918059/regulatory-role-of-the-microrna-29b-il-6-signaling-in-the-formation-of-vascular-mimicry
#8
Jian-Hong Fang, Zhi-Yuan Zheng, Jin-Yu Liu, Chen Xie, Zi-Jun Zhang, Shi-Mei Zhuang
Vascular mimicry (VM) is a critical complement for microcirculation and is implicated in tumor progression. We showed that IL-6 derived from tumor cells and stroma cells promoted tumor cells to form a VM structure, whereas blocking the IL-6 signaling by RNA interference, IL-6-neutralizing antibody, or STAT3 inhibitor suppressed the VM formation of tumor cells. Mechanism investigations revealed that IL-6 stimulated VM formation by activating STAT3, in turn upregulating VE-cadherin expression and MMP2 activity...
September 15, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28917579/microcirculation-in-the-murine-liver-a-computational-fluid-dynamic-model-based-on-3d-reconstruction-from-in-vivo-microscopy
#9
Monica Piergiovanni, Elena Bianchi, Giada Capitani, Irene Li Piani, Lucia Ganzer, Luca G Guidotti, Matteo Iannacone, Gabriele Dubini
The liver is organized in hexagonal functional units - termed lobules - characterized by a rather peculiar blood microcirculation, due to the presence of a tangled network of capillaries - termed sinusoids. A better understanding of the hemodynamics that governs liver microcirculation is relevant to clinical and biological studies aimed at improving our management of liver diseases and transplantation. Herein, we built a CFD model of a 3D sinusoidal network, based on in vivo images of a physiological mouse liver obtained with a 2-photon microscope...
September 2, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28916547/automated-measurement-of-microvascular-function-reveals-dysfunction-in-systemic-sclerosis-a-cross-sectional-study
#10
Daniel R Machin, Phillip E Gates, Hans Vink, Tracy M Frech, Anthony J Donato
OBJECTIVE: The aim of our study was to determine whether an automated capture and analysis system could detect differences in structure and function of sublingual microvessels in patients with systemic sclerosis (SSc) compared to healthy controls. METHODS: Intravital microscopy of the sublingual microcirculation was automatically captured and analyzed in 40 patients with SSc and 10 age-matched healthy controls. RESULTS: Total and perfused microvascular density were lower in patients with SSc compared with controls (total microvascular density: 2471 ± 134 μm/mm(2) vs 3067 ± 197 μm/mm(2), p = 0...
September 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28915818/the-impact-of-cardiovascular-co-morbidities-and-duration-of-diabetes-on-the-association-between-microvascular-function-and-glycaemic-control
#11
F Casanova, D D Adingupu, F Adams, K M Gooding, H C Looker, K Aizawa, F Dove, S Elyas, J J F Belch, P E Gates, R C Littleford, M Gilchrist, H M Colhoun, A C Shore, F Khan, W D Strain
BACKGROUND: Good glycaemic control in type 2 diabetes (T2DM) protects the microcirculation. Current guidelines suggest glycaemic targets be relaxed in advanced diabetes. We explored whether disease duration or pre-existing macrovascular complications attenuated the association between hyperglycaemia and microvascular function. METHODS: 743 participants with T2DM (n = 222), cardiovascular disease (CVD = 183), both (n = 177) or neither (controls = 161) from two centres in the UK, underwent standard clinical measures and endothelial dependent (ACh) and independent (SNP) microvascular function assessment using laser Doppler imaging...
September 15, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28915395/effects-of-polymyxin-b-hemoperfusion-on-hemodynamics-and-prognosis-in-septic-shock-patients
#12
Chen-Tse Lee, Yu-Kang Tu, Yi-Chun Yeh, Tzu Chang, Po-Yuan Shih, Anne Chao, Hsing-Hao Huang, Ya-Jung Cheng, Yu-Chang Yeh
PURPOSE: We designed this study to examine the clinical effects of polymyxin B hemoperfusion (PMX-HP) in septic shock patients. MATERIAL AND METHODS: We retrospectively examined the effects of PMX-HP in septic shock patients with intra-abdominal or gram-negative bacterial infection during October 2013-May 2016. A one-to-one matching between the PMX-HP and conventional groups was performed, and 28-day mortality, and change in inotropic score, Sequential Organ Failure Assessment (SOFA) score, and Acute Physiology and Chronic Health Evaluation II (APACHE II) score at 24h in the two groups were compared...
April 25, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28914777/the-usefulness-of-contrast-enhanced-ultrasound-in-the-assessment-of-early-kidney-transplant-function-and-complications
#13
REVIEW
Sara Álvarez Rodríguez, Vital Hevia Palacios, Enrique Sanz Mayayo, Victoria Gómez Dos Santos, Víctor Díez Nicolás, María Dolores Sánchez Gallego, Javier Lorca Álvaro, Francisco Javier Burgos Revilla
OBJECTIVES: The routine diagnostic method for assessment of renal graft dysfunction is Doppler ultrasound. However, contrast-enhanced ultrasound (CEUS) may provide more information about parenchymal flow and vascular status of kidney allografts. The aim of the study was to assess the effectiveness of CEUS in the immediate post-transplant period, focusing on acute vascular complications. A brief review of available literature and a report of our initial experience is made. MATERIAL AND METHODS: 15 kidney transplant (KT) cases with clinical suspicion of acute surgical complication were assessed with CEUS and conventional Doppler ultrasound (US)...
September 15, 2017: Diagnostics
https://www.readbyqxmd.com/read/28913499/perioperative-hyperoxia-perhaps-a-malady-in-disguise
#14
REVIEW
Yalim Dikmen, Aybike Onur
Oxygen is an element, which is used liberally during several medical procedures. The use of oxygen during perioperative care is a controversial issue. Anesthesiologists use oxygen to prevent hypoxemia during surgical procedures, but the effects of its liberal use can be harmful. Another argument for using high oxygen concentrations is to prevent surgical site infections by increasing oxygen levels at the incision site. Although inconclusive, literature concerning the use of high oxygen concentrations during anesthesia show that this approach may cause hemodynamic changes, altered microcirculation and increased oxidative stress...
April 2017: Rom J Anaesth Intensive Care
https://www.readbyqxmd.com/read/28912722/repeated-mandibular-extension-in-rat-a-procedure-to-modulate-the-cerebral-arteriolar-tone
#15
Dominga Lapi, Maurizio Varanini, Antonio Colantuoni, Cristina Del Seppia, Sergio Ghione, Enza Fommei, Rossana Scuri
Previous data have shown both in the rat and in the human that a single mandibular extension lasting 10 min induces a significant important and prolonged reduction in blood pressure and heart rate, affecting also rat pial microcirculation by the release of endothelial factors. In the present work, we assessed whether repeated mandibular extension could further prolong these effects. We performed two mandibular extensions, the second mandibular extension being applied 10 min after the first one. The second mandibular extension produced a reduction in blood pressure and heart rate for at least 240 min...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28912573/low-magnitude-high-frequency-vibration-accelerated-the-foot-wound-healing-of-n5-streptozotocin-induced-diabetic-rats-by-enhancing-glucose-transporter-4-and-blood-microcirculation
#16
Caroline Oi-Ling Yu, Kwok-Sui Leung, Jonney Lei Jiang, Tina Bai-Yan Wang, Simon Kwoon-Ho Chow, Wing-Hoi Cheung
Delayed wound healing is a Type 2 diabetes mellitus (DM) complication caused by hyperglycemia, systemic inflammation, and decreased blood microcirculation. Skeletal muscles are also affected by hyperglycemia, resulting in reduced blood flow and glucose uptake. Low Magnitude High Frequency Vibration (LMHFV) has been proven to be beneficial to muscle contractility and blood microcirculation. We hypothesized that LMHFV could accelerate the wound healing of n5-streptozotocin (n5-STZ)-induced DM rats by enhancing muscle activity and blood microcirculation...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28910792/inflammation-a-key-contributor-to-the-genesis-and-progression-of-chronic-kidney-disease
#17
Qi Qian
It has become apparent that inflammation and inflammatory reactions can evoke renal injury and promote chronic kidney disease (CKD) progression. Under physiological condition, intrarenal vascular distribution is heterogeneous, and medulla is hypoxic. To avoid energy deprivation in the low pO2 regions of the kidney, an array of hormones, autocoids, and vasoactive substances, including medullipin, prostaglandins, endothelins, nitric oxide, angiotensin II, kinins, and adenosine, tonically regulates the microvasculature to ensure a perfect match of the microcirculation (O2 supply) and renal tubules (O2 demand)...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28906195/impact-of-leg-elevation-and-compression-bandaging-on-skin-microcirculation-in-healthy-adults
#18
Deidre D Wipke-Tevis, Jane M Armer, Donna A Williams
No abstract text is available yet for this article.
October 2017: Western Journal of Nursing Research
https://www.readbyqxmd.com/read/28904799/clinical-significance-of-measuring-plasminogen-activator-inhibitor-1-in-sepsis
#19
Toshiaki Iba, Jecko Thachil
BACKGROUND: Disseminated thrombotic process in the microcirculation is considered to be an important cause of multiple organ dysfunction in sepsis. The fundamental purpose of this prothrombotic change was believed to be in the host defense against microbial dissemination. In that process, antifibrinolytic property plays an important role. MAIN BODY: For the understanding of pathophysiology of sepsis, it is quite useful to grasp the alterations in coagulation/fibrinolytic parameters, i...
2017: Journal of Intensive Care
https://www.readbyqxmd.com/read/28904002/assessing-microvascular-function-in-humans-from-a-chronic-disease-perspective
#20
Alfons J H M Houben, Remy J H Martens, Coen D A Stehouwer
Microvascular dysfunction (MVD) is considered a crucial pathway in the development and progression of cardiometabolic and renal disease and is associated with increased cardiovascular mortality. MVD often coexists with or even precedes macrovascular disease, possibly due to shared mechanisms of vascular damage, such as inflammatory processes and oxidative stress. One of the first events in MVD is endothelial dysfunction. With the use of different physiologic or pharmacologic stimuli, endothelium-dependent (micro)vascular reactivity can be studied...
September 13, 2017: Journal of the American Society of Nephrology: JASN
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