The relationship between neural activity and accompanying changes in cerebral blood flow (CBF) and oxygenation must be fully understood before data from brain imaging techniques can be correctly interpreted. Whether signals in fMRI reflect the neural input or output of an activated region is still unclear. Similarly, quantitative relationships between neural activity and changes in CBF are not ...

The article presents the results of studies melanin effect on recorded signals in laser Doppler flowmetry (LDF) and tissue reflectance oximetry (TO). By investigating properties microvascular blood flow skin oxygenation signals, we have gained new knowledge about race-related differences formation these signals. content intensity LDF TO methods was evaluated, limitations use representatives dif...

BACKGROUND There is a paucity of reports in the literature examining the pattern of sensory and autonomic neural recovery of myocutaneous microvascular flaps and skin grafts to the lower limbs after a prolonged period of time. OBJECTIVES To investigate the recovery of sensation and autonomic nerve activity in long-standing split-skin grafts applied to fascial beds and in myocutaneous microvas...

Results 48 clinicians (35 dms, 13 prs) from across the UK responded. At time of survey response, dms reported managing a mean 4.2 CYP with JLS; prs 17.9. 26% dms managed all CYP in collaboration (with a PR, paediatrician, adult rheumatologist or another DM) whilst 31% prs managed all CYP in collaboration (with a DM or paediatrician). 43% of dms and 91% prs reported formal transition arrangement...

Time irreversibility can be qualitatively defined as the degree of a signal for temporal asymmetry. Recently, a time irreversibility characterization method based on entropies of positive and negative increments has been proposed for experimental signals and applied to heart rate variability (HRV) data (central cardiovascular system (CVS)). The results led to interesting information as a time a...

BACKGROUND AND OBJECTIVES Low-intensity laser therapy (LILT) is widely used for wound healing promotion and its mechanism of action may be due to an enhancement of blood supply. The aim of this study was to evaluate blood flow alterations in a wound healing model, using laser Doppler flowmetry (LDF) associated with a normalized perfusion parameter. STUDY DESIGN/MATERIALS AND METHODS An injury...

Port-wine stain (PWS) birthmarks are one class of benign congenital vascular malformation. Laser therapy is the most successful treatment modality of PWS. Unfortunately, this approach has limited efficacy, with only 10% of patients experiencing complete blanching of the PWS. To address this problem, several research groups have developed technologies and methods designed to study treatment outc...

background: autonomic disturbance can leads to blood flow changes that can be studied by various methods.   objective: to assess the blood flow changes in patients with severe carpal tunnel syndrome  by laser doppler flowmetry   methods: ten patients with severe unilateral carpal tunnel syndrome confirmed by electrodiagnostic examination enrolled in this study. patients comprised one man and ni...

The serotonin receptor blocker ketanserin was given orally in a double blind crossover study to 10 patients with connective tissue disorders and Raynaud's phenomenon. Eight of the 10 patients improved clinically on ketanserin and none on placebo. Digital blood flow was assessed with laser Doppler flowmetry (LDF), photoplethysmography, and skin temperature measurements. Laser Doppler flowmetry w...

BACKGROUND Terlipressin has been suggested as the ideal drug to treat anesthesia-induced hypotension in patients under long-term renin-angiotensin system inhibitor treatment for arterial hypertension. The authors compared the effects of terlipressin and norepinephrine on systemic hemodynamic parameters and gastric mucosal perfusion using a laser Doppler flowmetry technique in patients treated w...