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Jochen-Frederick Hernekamp, Florian Neubrech, Tomke Cordts, Volker J Schmidt, Ulrich Kneser, Thomas Kremer
PURPOSE: The clinical course after major burns is characterized by microcirculatory changes and consecutive capillary leakage. However, current clinical monitoring does not properly assess microcirculation, whereas macrohemodynamic changes are continuously evaluated. Here, we assess if macrohemodynamic and microhemodynamic parameters after burn trauma are correlated in a rat model. METHODS: Burn plasma harvested from donor rats 4 hours after thermal injury (30% total body surface area, 100 °C water, 12 seconds) was administered intravenously to healthy animals during 2 hours of intravital microscopy (burn group [BG])...
October 17, 2016: Annals of Plastic Surgery
Hao-Lin Shen, Shu-Ping Yang, Kang-Jian Wang, Bei-Lei Huang, Wen-Bao Huang, Jin-Zhi Wu, Guo-Rong Lv
OBJECTIVE: Improvement in regional blood flow has been shown to ameliorate diabetic gastroparesis. We compared the gastric blood supply in diabetic patients with gastroparesis, with that in healthy subjects, by using contrast-enhanced ultrasound (CEUS). METHODS: Thirty healthy subjects and forty patients with diabetic gastroparesis were enrolled. The CEUS parameters of greater curvatures of the antrum (GCOA) and lesser curvatures of antrum (LCOA), including peak intensity (PI) and the area under the curve (AUC), were compared between the two groups...
October 19, 2016: British Journal of Radiology
Fang-Fei Wei, Nadja E A Drummen, Lutgarde Thijs, Lotte Jacobs, Marjolein Herfs, Cynthia Van't Hoofd, Cees Vermeer, Jan A Staessen
Vitamin-K-dependent carboxylation of matrix Gla protein (MGP) protects the macrocirculation against calcification. We recently reported in a multiethnic population study that the estimated glomerular filtration rate, a microvascular trait, decreased and the risk of chronic kidney disease increased with higher circulating levels of inactive dephospho-uncarboxylated MGP, a marker of vitamin K deficiency. These findings highlighted the possibility that vitamin K might have a beneficial effect on the renal microcirculation...
September 2016: Pulse (Basel, Switzerland)
Leroy L Cooper, Gary F Mitchell
BACKGROUND: Aortic stiffness is associated with cardiovascular and cerebrovascular events and cognitive decline. This mini-review focuses on relations of aortic stiffness with microvascular dysfunction and discusses the contribution of abnormal pulsatile hemodynamics to cerebrovascular damage and cognitive decline. We also provide a rationale for considering aortic stiffness as a putative and important contributor to memory impairment in older individuals. SUMMARY: Aging is associated with stiffening of the aorta but not the muscular arteries, which reduces wave reflection and increases the transmission of pulsatility into the periphery...
September 2016: Pulse (Basel, Switzerland)
Edward Gilbert-Kawai, Jonny Coppel, Hennis Phillip, Michael Grocott, Can Ince, Daniel Martin
Present knowledge of how the microcirculation is altered by prolonged exposure to hypoxia at high altitude is incomplete and modification of existing analytical techniques may improve our knowledge considerably. We set out to use a novel simplified method of measuring in vivo capillary density during an expedition to high altitude using a CytoCam incident dark field imaging video-microscope. The simplified method of data capture involved recording one-second images of the mucosal surface of the inner lip to reveal data about microvasculature density in ten individuals...
2016: F1000Research
Joyce Mendes Soares, Athos Gabriel Vilela Queiroz, Vaniely Kaliny Pinheiro de Queiroz, Ana Rodrigues Falbo, Marcelo Neves Silva, Tania Cursino de Menezes Couceiro, Luciana Cavalcanti Lima
INTRODUCTION: Blood is an important resource in several lifesaving interventions, such as anemia correction and improvement of oxygen transport capacity. Despite advances, packed red blood cell (PRBC) transfusion still involves risks. The aim of this study was to describe the knowledge of anesthesiologists about the indications, adverse effects, and alternatives to red blood cell transfusion intraoperatively. METHOD: Cross-sectional study using a questionnaire containing multiple choice questions and clinical cases related to relevant factors on the decision whether to perform PRBC transfusion, its adverse effects, hemoglobin triggers, preventive measures, and blood conservation strategies...
October 10, 2016: Revista Brasileira de Anestesiologia
Olta Gishti, Janine F Felix, Irwin Reiss, Mohammad Kamran Ikram, Eric A P Steegers, Albert Hofman, Vincent W V Jaddoe, Romy Gaillard
No abstract text is available yet for this article.
October 15, 2016: American Journal of Epidemiology
Odaro Huckstep, Adam J Lewandowski, Paul Leeson
Human clinical studies as well as laboratory animal studies demonstrate that offspring of pregnancies affected by common complications, such as preeclampsia and preterm birth, display developmental phenotypes that relate distinctly to the pregnancy disorder. Several studies have now found microvascular differences in offspring of hypertensive pregnancies, and there is interest in whether these may underlie epidemiologic associations between gestational hypertension and a higher risk of hypertension and stroke in the offspring...
October 15, 2016: American Journal of Epidemiology
Tomoaki Shiba, Mao Takahashi, Tadashi Matsumoto, Kohji Shirai, Yuichi Hori
PROPOSE: The purpose of this study was to determine whether there were significant correlations between the pulse waveform in the capillary area of the optic nerve head (ONH) microcirculation shown by laser speckle flowgraphy (LSFG) and parameters of the systemic condition, especially the cardio-ankle vascular index (CAVI). METHOD: We studied 130 men (ages 60.5 ± 10.9 years) who visited the Vascular Function Section of the Department of Cardiovascular Center of Toho University Sakura Medical Center...
October 14, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
Frederic Pastouret, Lucia Cardozo, Jan Lamote, Ronald Buyl, Pierre Lievens
BACKGROUND A whole-body vibration technique delivered in a horizontal position through a massage mattress was introduced in 2007. The present study analyzed the effects of different exposure periods to these vibrations on microcirculation of mice. MATERIAL AND METHODS Different periods of vibrations (30Hz) were locally delivered in a horizontal position on the external abdominal skin in 3 randomized groups of mice (N=42). The 3 groups receiving vibrations were compared to an untreated control group (N=14). The 3 experimental groups received 3, 6, and 10 min of vibrations...
October 14, 2016: Medical Science Monitor Basic Research
E N D'yakonova, A I Fedin, V V Makerova, V N Gorbunov
AIM: To study the efficacy of L-lysine aescinat in the treatment of vascular and microvascular disorders in patients with cerebral venous dystonia. MATERIAL AND METHODS: Sixty-eight patients, 25 male and 43 female, aged from 25 to 56 years, with disturbances of venous cerebral blood circulation and venous outflow difficulties were examined. The examination included the assessment of cerebral hemodynamics using the algorithm of complex ultrasound examinations and functional status of the microcirculation by the laser Doppler flowmetry (LDF) at baseline and 10 days after treatment with L-lysine aescinat...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Yingli Jing, Fan Bai, Hui Chen, Hao Dong
BACKGROUND: Melatonin can be neuroprotective in models of neurological injury, but its effects on blood vessel loss and neurological impairment following spinal cord injury (SCI) are unclear. Our goal herein was to evaluate the possible protective action of melatonin on the above SCI-induced damage in rats. MATERIALS AND METHODS: Sixty-three female Sprague-Dawley rats were randomly divided into three equal groups: sham, SCI and melatonin groups. Melatonin (10 mg/kg) was injected intraperitoneally and further administered twice a day at indicated time after a moderate injury at T10 in melatonin group...
October 13, 2016: Journal of Spinal Cord Medicine
Lampros Liasis, George Malietzis, George Galyfos, Thanos Athanasiou, Harry T Papaconstantinou, Fragiska Sigala, Georgios Zografos, Konstantinos Filis
INTRODUCTION: Lower limb ischaemia in diabetic patients is a result of macro- and microcirculation dysfunction. Diabetic patients undergoing limb amputation carry high mortality and morbidity rates, and decision making concerning the level of amputation is critical. Aim of this study is to evaluate a novel microdialysis technique in order to monitor tissue microcirculation preoperatively and predict the success of limb amputation in such patients. MATERIALS AND METHODS: Overall, 165 patients with type II diabetes mellitus undergoing lower limb amputation were enrolled...
October 12, 2016: Wound Repair and Regeneration
J Rothenberger, W Petersen, H E Schaller, M Held
A universal protocol determining the number of leeches and their application time does not exist. The aim of this study, therefore, is to quantify perfusion dynamics in venous congested tissues after leech application to get more detailed information about changes due to leech-induced skin microcirculation and to evaluate the usability of the O2C device in terms of determining the appropriate number of leeches and the duration of therapy. Twelve patients with the need for leech therapy participated in the study...
October 12, 2016: Wound Repair and Regeneration
Tomoko Nomura, Yasuko Yoshida-Amano, Kenichiro Yoshida, Akihiko Fujii, Masanori Tanahashi, Yoshinori Sugiyama, Kayoko Iwata, Takatoshi Murase
OBJECTIVE: Several studies have shown that a deterioration of skin properties, an impaired cutaneous microcirculation function and an imbalance of autonomic nervous activity are observed in smokers and in patients with diabetes mellitus or Raynaud's phenomenon. These observations suggest that skin properties are associated with cutaneous microcirculatory function and autonomic nervous activity in pathological conditions. However, there is no published evidence to support the concept that these two functions have any relationship with skin properties even in healthy subjects...
October 12, 2016: International Journal of Cosmetic Science
Charlotte Iacobaeus, Ellika Andolf, Malin Thorsell, Katarina Bremme, Gun JÖrneskog, Eva Östlund, Thomas Kahan
OBJECTIVE: To examine alterations in maternal vascular structure and function during normal pregnancy. METHODS: We assessed brachial and central blood pressure, pulse wave velocity and augmentation index (by pulse wave analysis and applanation tonometry), common carotid artery structure (by ultrasonography), and endothelial function in the brachial artery (by post-ischemic hyperemia induced flow mediated vasodilation and glyceryl nitrate) and in the forearm skin microcirculation (by laser Doppler perfusion imaging during iontophoretic administration of acetylcholine and sodium nitroprusside) in 52 healthy primiparous women at 14, 24 and 34 weeks of gestation, and nine months post partum...
October 12, 2016: Ultrasound in Obstetrics & Gynecology
E Christiaan Boerma, Thomas W L Scheeren
No abstract text is available yet for this article.
October 11, 2016: Journal of Clinical Monitoring and Computing
Hui Tian, Qi Wang
To conduct a quantitative analysis of microcirculation blood perfusion in patients with hepatocellular carcinoma (HCC) before and after transcatheter arterial chemoembolisation (TACE) using contrast-enhanced ultrasound (CEUS). From 2013 June to 2105 October, a total of 106 HCC patients undergoing TACE were recruited. CEUS was performed before and after TACE to determine time-intensity curve (TIC) and perfusion quantitative parameters of the HCC lesions and surrounding liver parenchyma. Quantitative perfusion parameters were obtained using the region of interest method...
October 8, 2016: European Journal of Cancer
Daojiang Yu, Shan Li, Shuai Wang, Xiujie Li, Minsheng Zhu, Shai Huang, Li Sun, Yongsheng Zhang, Yanli Liu, Shouli Wang
Radiation-induced skin injury, which remains a serious concern in radiation therapy, is currently believed to be the result of vascular endothelial cell injury and apoptosis. Here, we established a model of acute radiation-induced skin injury and compared the effect of different vascular growth factors on skin healing by observing the changes of microcirculation and cell apoptosis. Vascular endothelial growth factor (VEGF) was more effective at inhibiting apoptosis and preventing injury progression than other factors...
October 11, 2016: Marine Drugs
Wan Qin, Meredith A Roberts, Xiaoli Qi, Charles E Murry, Ying Zheng, Ruikang K Wang
In this study, we propose a novel implementation of optical coherence tomography-based angiography combined with ex vivo perfusion of fixed hearts to visualize coronary microvascular structure and function. The extracorporeal perfusion of Intralipid solution allows depth-resolved angiographic imaging, control of perfusion pressure, and high-resolution optical microangiography. The imaging technique offers new opportunities for microcirculation research in the heart, which has been challenging due to motion artifacts and the lack of independent control of pressure and flow...
October 7, 2016: Physics in Medicine and Biology
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