Search Results
Results 201 - 250 of 1557
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Nagata Koji - - 2009
Some disorders such as circulatory disease and metabolic abnormality cause many problems to peripheral blood flow condition. Therefore, frequent measurement of the blood flow condition is bound to contribute to precaution against those disorders and to control of conditions of the diseases. We propose a convenient means of blood flow ...
Altintas M A - - 2009
Various approaches are used to study microcirculation, however, no modality evaluates microcirculation and histomorphology on cellular levels. We hypothesized that reflectance-mode confocal microscopy (RCM) enables simultaneous evaluation in vivo of both microcirculation and histomorphology. The forearm of 20 volunteers was exposed to either local heat stress (HS-group), or to local ...
Jan Yih-Kuen - - 2009
The objective of this study was to investigate age-related changes of microvascular functions using wavelet analysis of blood flow oscillations (BFO), and to develop a new quantification method to present wavelet coefficients for studying the contribution of each blood flow control mechanism to the skin vasodilatory response. 20 older people ...
Clough Geraldine - - 2009
OBJECTIVE: To compare the output from a novel high power, wide separation laser Doppler flow probe (DP1-V2-HP, 4 mm, with IRLD20) with that of a standard flow probe (DP1-V2, 0.5 mm, with DRT4) (Moor UK) and to explore its potential for use in the noninvasive measurement of blood flow in ...
Petrofsky Jerrold Scott - - 2009
Numerous studies have examined the effect of local and global heating of the body on skin blood flow. However, the effect of the moisture content of the heat source on the skin blood flow response has not been examined. Thirty-three subjects, without diabetes or cardiovascular disease, between the ages of ...
Murray A K - - 2009
Superficial telangiectases associated with systemic sclerosis may be more responsive to treatment than those deeper in the dermis. We investigated whether dual-wavelength laser Doppler imaging (LDI) is sufficiently sensitive to ascertain the distribution of blood flow within telangiectases and whether blood flow relates to telangiectatic diameter. The perfusion and diameter ...
Kalincik Tomas - - 2009
Subjects with severe chronic spinal cord injury (SCI) are prone to hypothermia when they are exposed to relatively low environmental temperatures that are normally well tolerated by healthy individuals. This impaired thermoregulation is presumably due to disconnection of territories below the SCI from supraspinal thermoregulatory centers. However, it is not ...
Honda Masashi - - 2009
Bonito extract (BE) has been shown to improve various fatigue-related symptoms. The possibility that the improvement of blood flow contributes to the improvement of fatigue-related symptoms has been reported. However, even though BE has been found to increase peripheral blood flow in humans, an understanding of its mechanisms has remained ...
Ogay Vyacheslav - - 2009
Blood plexuses are characteristic anatomical features of acupuncture points (APs). We developed an optical technique using diffusive light illumination to increase the brightened area of skin for observation of the blood plexuses in skin. We found that the blood plexuses were coiled blood vessels which came out of the perforations ...
Voncken Marisol J - - 2009
This study investigates whether social anxiety disorder (SAD) patients with blushing complaints show heightened physiological blushing and arousability in social situations than SAD patients without blushing complaints and healthy controls. SAD blushers (n=32), SAD non-blushers (n=34), and healthy controls (n=25) conducted two social tasks. The physiological responses cheek and forehead ...
Good Christopher R - - 2009
BACKGROUND: Reports of glenohumeral chondrolysis following arthroscopy have raised concern about the deleterious effects that thermal devices may have on articular cartilage. The purpose of this study was to investigate the effects of flow and duration of treatment with a thermal device on temperatures within cadaveric glenohumeral joint specimens. It ...
McLellan Katie - - 2009
BACKGROUND: The present study examined the effects of local heat, global heat, and the interaction between these two endothelial stressors on the blood flow of the skin of the foot in people who are older and who have diabetes. METHODS: Subjects who were older (mean age 64.2 +/- 5.9 years) ...
Petrofsky J - - 2009
Pennes first described a model of heat transfer through the limb based only on calories delivered from a heat source, calories produced by metabolism and skin blood flow. The purpose of this study was to determine the effect of a moist versus a dry heat source on the skin in ...
Ambrozy Ewald - - 2009
To treat mixed skin ulcers effectively, it is important to investigate skin microcirculation in greater detail. Therefore, we used laser Doppler perfusion imaging and capillary microscopy for assessing both subpapillary and nutritive microcirculation in four defined regions of the skin in 17 patients with mixed ulcers caused by a combination ...
Bilgili Hasan - - 2009
OBJECTIVE: The purpose of this study was to show the hemostatic effect of spray, solution and tampon forms of Ankaferd Blood Stopper (ABS), a unique medicinal plant extract historically used as a hemostatic agent in Turkish folklore medicine, in a porcine bleeding model. MATERIALS AND METHODS: Two 1-year-old pigs were ...
Maloney-Hinds Colleen - - 2009
BACKGROUND: We recently demonstrated concomitant increases in skin blood flow and nitric oxide (NO) production in young healthy adults in response to externally applied vibration of the forearm. Research has shown that adults with type 2 diabetes exhibit depressed NO production and vascular responses to NO. We hypothesized that subjects ...
Seven Bedri - - 2009
The aim of the present experimental study was to determine and compare the effect of Hippophae rhamnoides L. extract (HRe-1) and of dexpanthenol on the blood flow of a wound region, in rats using xenon-133 ((133)Xe) clearance technique. Burn wounds were made on both thighs of rats and, HRe-1 and ...
Koskela Marjo - - 2009
The effect of sepsis on epidermal wound healing has not been previously studied. It was hypothesised that epidermal wound healing is disturbed in severe sepsis. Blister wounds were induced in 35 patients with severe sepsis and in 15 healthy controls. The healing of the wounds was followed up by measuring ...
Stephen Ian D - - 2009
Skin blood perfusion and oxygenation depends upon cardiovascular, hormonal and circulatory health in humans and provides socio-sexual signals of underlying physiology, dominance and reproductive status in some primates. We allowed participants to manipulate colour calibrated facial photographs along empirically-measured oxygenated and deoxygenated blood colour axes both separately and simultaneously, to ...
Alekseev S I - - 2009
Recently we showed that the Pennes bioheat transfer equation was not adequate to quantify mm wave heating of the skin at high blood flow rates. To do so, it is necessary to incorporate an "effective" thermal conductivity to obtain a hybrid bioheat equation (HBHE). The main aim of this study ...
Ichihashi Masaru M Safety Research Laboratory, Research Division, Mitsubishi Tanabe Pharma Corporation, Osaka-shi, - - 2009
The effects of long-term treatment with Nanpao, a kampo medicine, on cold constitution were evaluated in aged female rats. Five-month-old rats were administered Nanpao orally at doses of 0, 30, or 100 mg/kg/day. The peripheral blood flow and surface skin temperature in the hind paws were measured using a laser ...
Beed M - - 2009
BACKGROUND: Forearm skin vascular reactivity may be assessed using a transient hyperaemic response (THR) after 20 s of brachial artery compression. THR has been manipulated by iontophoresis of vasodilators, but not vasoconstrictors, possibly because of low baseline blood flow. The effects of vasoconstrictors on vascular reactivity of pre-dilated blood vessels ...
Moore T L - - 2009
BACKGROUND: Little is known about the pathophysiology of localized scleroderma (skin fibrosis, also termed 'morphoea'), although it is likely that microvascular dysfunction is a contributing factor. OBJECTIVES: Our aim was to investigate different components of blood flow in morphoea using infrared thermography and dual-wavelength laser Doppler imaging (LDI). METHODS: Eight ...
Martín-Biosca Y - - 2009
Biopartitioning micellar chromatography (BMC), a mode of micellar liquid chromatography that uses micellar mobile phases of Brij35 in adequate experimental conditions, has demonstrated to be useful in mimicking the drug partitioning process into biological systems. In this paper, the usefulness of BMC for predicting the partition coefficients from blood to ...
Forst Thomas - - 2008
Skin microvascular assessment has progressed to an important evaluation in patients with diabetes mellitus. This study was done to evaluate a new device using micro-lightguide spectrophotometry in the assessment of skin microvascular function. Twenty nondiabetic subjects (age 46.6 +/- 14.8 years; mean +/- SD) and 20 diabetic patients (age 59.4 ...
Tankanag Arina - - 2008
An original method for the analysis of oscillations of cutaneous blood flow has been developed, which makes use of laser Doppler flowmetry (LDF) data and is based on the continuous wavelet transform and adaptive wavelet theory. The potential of the method has been demonstrated in experiments with the response of ...
Husmann Marc - - 2008
To investigate whether intermittent pneumatic compression (IPC) augments skin blood flow through transient suspension of local vasoregulation, the veno-arteriolar response (VAR), in healthy controls and in patients with peripheral arterial disease (PAD). Nineteen healthy limbs and twenty-two limbs with PAD were examined. To assess VAR, skin blood flow (SBF) was ...
Shibasaki Manabu - - 2008
Previously, we found that nitric oxide (NO) inhibits cutaneous vasoconstrictor responsiveness evoked by whole body cooling, as well as an orthostatic stress in the heat-stressed human (Shibasaki M, Durand S, Davis SL, Cui J, Low DA, Keller DM, Crandall CG. J Physiol 585: 627-634, 2007). However, it remains unknown whether ...
Petrofsky J - - 2008
When electrical stimulation is used on wounds, the electrical current has difficulty penetrating areas where there is necrotic tissue. Further, for an irregularly shaped wound, current distribution is poor in some areas of the wound since conventional two-electrode delivery systems provide the greatest current in a line directly between the ...
Halson Shona L - - 2008
Cold water immersion (CWI) has become a popular means of enhancing recovery from various forms of exercise. However, there is minimal scientific information on the physiological effects of CWI following cycling in the heat. PURPOSE: To examine the safety and acute thermoregulatory, cardiovascular, metabolic, endocrine, and inflammatory responses to CWI ...
Petrofsky Jerrold S - - 2008
BACKGROUND: The environment surrounding vascular endothelial cells determines the contractile state of vascular smooth muscle. The present investigation examined the interrelationships between 3 factors known to effect skin blood flow (global heat, local heat and electrical stimulation) to see how they interacted. MATERIAL/METHODS: Twenty two males participated in 3 series ...
Bourcier Matthew E - - 2008
Orthostasis due to autonomic neuropathy can cause severe debilitation and prove refractory to treatment. This report describes a case of severe sympathetic and parasympathetic autonomic dysfunction as a consequence of acetylcholine receptor antibodies and Sjogren's syndrome. Symptomatic management, plasma fluid expanders, and IVIG therapy failed to offer a salutary response ...
Lei Jing - - 2008
The aim of the present study was to explore variation in skin blood flow and temperature following experimental muscle pain. In 14 male human subjects, 2 ml and 4.8 ml of hypertonic (5.8%) saline were injected into the left tibialis anterior (TA) muscle to induce muscle pain. The subjects rated ...
Chang Cheng-Jen - - 2008
BACKGROUND/PURPOSE: Vascular ectasia observed in port wine stain (PWS) birthmarks might be secondary to localized reduction of neural innervation and associated loss of autonomic stimulation. Our objective was to investigate this theory and evaluate nerve density, blood vessel density, and average blood vessel size in untreated and pulsed dye laser ...
Arnaud Françoise - - 2008
INTRODUCTION: Chest seals are externally applied devices used to treat an open pneumothorax. There is concern that chest seals used for treatment of an open pneumothorax can fail due to coagulation or malfunction of the external vent and poor skin adherence. Chest seal failure may lead to respiratory compromise or ...
Koskinen L-O D - - 2008
OBJECTIVE: To study the sympathetically mediated effects of transthoracic endoscopic sympathicotomy (TES) in the treatment of severe primary palmar hyperhidrosis. MATERIALS AND METHODS: The effects of TES, on sympathetic ganglia at the thoracic level of 2-3, finger blood flow, temperature, and on heat and cold provocation were investigated. Middle cerebral ...
Ley O - - 2008
Vascular reactivity (VR) denotes changes in volumetric blood flow in response to arterial occlusion. Current techniques to study VR rely on monitoring blood flow parameters and serve to predict the risk of future cardiovascular complications. Because tissue temperature is directly impacted by blood flow, a simplified thermal model was developed ...
Egaña José Tomás - - 2009
BACKGROUND AND AIMS: Neovascularization plays a pivotal role in tissue engineering and tissue regeneration. However, reliable technologies to visualize and quantify blood vessel networks in target tissue areas are still pending. In this work, we introduce a new method which allows comparing vascularization levels in normal and tissue-engineered skin. MATERIALS ...
Kai Kyoko - - 2008
OBJECTIVE: The aim of this study was to evaluate the effect of a cool environment on the peripheral skin blood flow and subjective thermal sensations of female office workers and female students. METHODS: The subjects were 26 female bank employees (mean age, 38 years) who worked in a cool environment ...
Widmer R Jay RJ The Michael E. DeBakey Institute, Texas A&M University, College Station, Texas, - - 2008
Although it is well established that the application of local heat causes a biphasic increase in skin blood flow, the responsible microvessels have not been identified. A bifurcating network of arterioles (1st-5th orders, 60-15 mum, n = 10 per group) of the intact, unanesthetized, translucent bat wing were visualized on ...
Kamiya Atsunori - - 2008
Although an importance of vasoconstrictor skin sympathetic nerve activity (SNA) in control of cutaneous circulation is widely recognized, the decoding rule that translate dynamic fluctuations of vasoconstrictor skin SNA into skin blood flow is not fully understood. In 10 male subjects who rested in supine position under normothermic condition, we ...
Fujii Naoto - - 2008
We tested the hypothesis that hyperthermic hyperventilation in part reflects enhanced chemoreceptor ventilatory O(2) drive, and that the resultant hypocapnia attenuates ventilatory responses and/or middle cerebral artery mean blood velocity (MCAV(mean)) in resting humans. Eleven healthy subjects were passively heated for 50-80 min, causing oesophageal temperature (T(oes)) to increase by ...
Ngo Binh - - 2008
BACKGROUND: Necrobiosis lipoidica diabeticorum (NLD) is a granulomatous skin reaction found in < 1% of diabetic patients. Our purpose was to determine if NLD represented areas of cutaneous ischemia. METHODS: Using laser Doppler flowmetry, we measured cutaneous blood flow in nine diabetic patients at NLD lesions and at contiguous uninvolved ...
Aggarwal Yogender - - 2008
The thermoregulatory control of human skin blood flow is vital to maintain the body heat storage during challenges of thermal homeostasis under heat stress. Whenever thermal homeostasis disturbed, the heat load exceeds heat dissipation capacity, which alters the cutaneous vascular responses along with other body physiological variables. Whole body skin ...
Manonukul Jane - - 2008
Cases of hematidrosis (bloody sweat) are extremely rare. This disease has been described in various terms and has been often tied to religious belief as stigmatization. We report a typical patient with hematidrosis in a 14-year-old girl who frequently bled from her scalp and palms, and, occasionally, from trunk, soles, ...
Perugini P - - 2008
Oleuropein, a phenolic compound derived from olive leaves and oil, is known to possess several biological properties, many of which may be attributed to its antioxidant and free radical-scavenging activities. Nevertheless, up to now, the cosmetic activity of this molecule has not been extensively investigated. The aim of this work ...
Vuksanović Vesna - - 2008
We present a study of the relationship between blood flow and skin temperature under different dynamics of skin-temperature-change: locally induced thermal shock and well controlled, gradual change. First, we demonstrate memory phenomena for blood flow and skin temperature under both conditions. Secondly, we point out that the "hysteresis" loops obtained ...
Kiyama Takahiko - - 2008
Twenty patients who underwent total hip arthroplasty were randomly allocated to have surgery through a mini incision of < or = 8 cm (mini-incision surgery [MIS] group, n = 10) or a standard incision of 14 cm (standard group, n = 10). A laser Doppler flowmeter was used to measure ...
Wissler Eugene H - - 2008
Various aspects of skin blood flow (SkBF) in human beings have been studied experimentally for more than seven decades. While reasonably complete phenomenological descriptions of individual factors have emerged from those investigations, little effort has been devoted to assembling the component parts into a coherent description of the entire system. ...
Jansen Richard G - - 2008
OBJECTIVE: To compare the tissue reactions to implanted collagen scaffolds in the palate and the skin of rats. DESIGN: Crosslinked collagen scaffolds were implanted submucoperiosteally in the palate, and subcutaneously on the skull and on the back of 25 rats and evaluated after up to 16 weeks. On H&E-stained sections, ...
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