Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"flowmetry"”.
-
Intra-operative optical monitoring of bowel tissue viability based on photoplethysmography and laser doppler flowmetry
… the established techniques, laser Doppler flowmetry (LDF) and Photoplethysmography (PPG), into one probe intended for assessment of perfusion in abdominal tissue during bowel resection intraoperatively. In PPG, changes in transmission of light through tissue due to pulsation of small …
-
Distal Intraoperative Flowmetry for Assessment if Haemodynamics after Infrainguinal Arterial Reconstructions // Дистална интраоперативна флоуметрия за оценка на хемодинамиката след инфраингвинални артериални реконструкции
Цел: Да се представят и интерпретират термодинамичните показатели с прогностично значение за изхода от реконструктивни операции под ингвиналния лигамент, чрез интраоперативна флоуметрия и ефекта от медикаментозна вазодилатация под дисталната анастомоза на периферните байпаси. Представени са …
-
The development of biomedical instrumentation using backscattered laser light
… using the techniques of laser Doppler flowmetry and pulse oximetry. An investigation of the responses of Doppler flowmeters using different signal processing bandwidths and laser sources revealed two major findings. Firstly, that careful choice of processing bandwidth is required in …
-
Dietary nitrate supplementation augments nitric oxide synthase-dependent and independent reflex cutaneous vasodilation in healthy humans
… Skin blood flow was measured via laser-Doppler flowmetry and mean arterial pressure determined; cutaneous vascular conductance (CVC) was calculated and expressed as %CVCmax. Subjects underwent heat stress pre- and post-nitrate supplementation (3 days of BRJ: 5mM, 0.45g nitrates per day). BRJ …
-
Oscillations in microvascular flow : their relationship to tissue oxygenation, cellular metabolic function and their diagnostic potential for detecting skin melanoma - clinical, experimental and theoretical investigations
… humans. Here, data recorded using laser Doppler flowmetry (LDF) in malignant melanoma and control lesions are analysed using techniques designed for application to non-stationary, time-varying data. Many studies utilising LDF have previously revealed increased blood flow in malignant lesions, but …
-
The Contribution of Nitric Oxide to the Skin Blood Flow Response to Exercise in Boys and Men
… y) and 12 men (22.22.0 y) using laser-Doppler flowmetry and L-NAME to inhibit nitric oxide (NO). The exercise-induced SkBF increase was greater in boys versus men (p=0.03). L-NAME blunted SkBF response during exercise in boys and men (p<0.01) (758±201 to 429±229 percent change from baseline vs. …
-
Quantifying the Relationship of Bilateral Blood Flow in Glabrous Skin at Rest and During Sympathetic Perturbations
… from both middle fingers via laser Doppler flowmetry, while at rest in a thermoneutral room for 20 minutes and in response to 4 randomized sympathetic perturbations (2 breath holds and 2 cold stimuli) while centrally vasodilated via heating of the back. Correlation coefficients while at …
-
Retinal Ischemia in the In Vivo Rodent: Cellular and Vascular Characteristics
… an imaging technique known as laser speckle flowmetry (LSF) to generate two dimensional maps of blood flow changes. We demonstrated that the inner retinal and choroidal circulations could be imaged noninvasively, and used this technique to study functional hyperemia responses in the retina. …
-
Novel Multifunctional Laser Diagnostics
… tissue oxygen saturation and laser Doppler flowmetry, provides new insights into bio-technological issues. The challenges identified with biological characteristics include sampling zones and physiological features of the skin. Technological, photonics, electronics and computing challenges …
-
Akutmonitoring bei Lappenplastiken mittels Laser-Doppler-Flussmessung in Kombination mit einem Lagewechseltest
With the help of Laser Doppler flowmetry (LDF), fifteen patients with skin grafting on different skin areas were tested with the transposition test for post-operative vitality control and for observation of microcirculatory changes depending on position. The instrument used was a LDF-monitor DRT4 …
-
Determining whether plasma levels of KATP channels are related to vascular function
… using (i) iontophoresis with laser Doppler flowmetry (LDF); (ii) post-occlusive reactive hyperaemia test (PORH) in the skin microvessels; (iii) pulse wave analysis (PWA) for arterial stiffness and (iv) flow-mediated dilation (FMD) in the macrovessels. <br/><br/>Results: This study showed …
-
Effects of Mild Blast Traumatic Brain Injury on Cerebral Vascular Function, Histopathological and Behavioral Outcomes in Rats
… relative cerebral perfusion (laser Doppler flowmetry, LDF) and cerebral vascular resistance (CVR) were monitored for two hours post-blast in a second study. To assess the effects of bTBI on neuronal injury, numbers of FluoroJade-C (FJC) positive cells were counted in brain sections obtained …
-
Negative Pressure Wound Therapy - Mechanisms of Action and Protecting Exposed Blood Vessels in the Wound Bed
… was studied with transcutaneous laser Doppler flowmetry (LDF), invasive LDF, and thermodiffusion. Femoral artery blood flow was studied with invasive LDF. Pressure in the wound edge tissue, in the wound cavity and periarterial pressure was measured with pressure transducers. Wound contraction …
-
Evaluating local skin heating as an early detection method for small-fiber neuropathy in women with breast cancer receiving paclitaxel (Taxol®)
… Axon reflexes were measured using laser Doppler Flowmetry. Axon flares were measured using full-field laser perfusion imaging. TIPN was measured using the 5-item Short Form of the Total Neuropathy Score (Reduced Version). Results identified potential signs of small-fiber TIPN in BCS after 6 weeks …
-
Αιμοδυναμική μελέτη της ταυτόχρονης δημιουργίας εξωτερικής (shunt) & εσωτερικής (fistula) αρτηριοφλεβικής επικοινωνίας στα μηριαία αγγεία σκύλου: Πειραματική εργασία
… the general principles of the "electromagnetic flowmetry" since this method was used for the study of the blood flow in our experimental model. Consequently we describe the design of the experiment, the method the A-V fistula is created and the external shunt is connected. This "mixed" vascular …
-
Stellenwert der Messung des renalen Widerstandsindex bei Patienten mit Leberzirrhose
… was no significant difference in the doppler flowmetry of RI before and after medical treatment [(spironolacton (n = 37), furosemid (n = 29), beta- blocker (n = 12) or lactulose (n = 27)]. Only the reduction of xipamid showed a significant increase of RI (p<0,05). There was a direct …
-
Adenosine receptors in cutaneous thermal hyperemia and active vasodilation in humans
… skin blood flow was monitored via laser-Doppler flowmetry (LDF). The data obtained from these experiments suggest A[subscript]1/A[subscript]2 adenosine receptor activation directly contributes to cutaneous thermal hyperemia. These data further suggest a portion of the NO response may be explained …
-
Nonlinear Dynamics of Microcirculation and Energy Metabolism for the Prediction of Cardiovascular Risk
… methods used for this task are the laser Doppler flowmetry (LDF) and laser fluorescence spectroscopy (LFS), which respectively allow tracing blood flow and the amounts of the coenzyme NAD(P)H (nicotamide adenine dinucleotide) that is involved in the cellular production of ATP (adenosine …
-
Peripheral blood flow changes in response to post-exercise cold water immersion
… of blood flow in thigh skin (laser Doppler flowmetry), vastus lateralis muscle (near infrared spectroscopy), and common femoral artery (Doppler ultrasound), heart rate, mean arterial pressure, skin, muscle, rectal, and mean body temperatures were obtained prior to exercise and up to 60 min …
Page 1 of 2