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.
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Showing 1 to 19 of 19 for “"arterio-venous"”.
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The use of brachio-basilic arterio-venous fistulae for haemodialysis – a single centre descriptive study
… local experience with the use of brachio-basilic arteriovenous fistulae (BBAVFs) and to encourage wider local acceptance of the procedure in accordance with international guidelines. The primary aim of the study was to report on access patency, including primary, assisted-primary and secondary …
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4D flow and displacement sensitive MR imaging of upper arm arterio-venous connections for haemodialysis
… requires a vascular access method, commonly Arteriovenous (AV) fistulae and grafts. These access methods must be regularly assessed to ensure the access remains unblocked and the flow rate is normal. Phase Contrast MRA (PC-MRA) is a versatile Magnetic Resonance Imaging (MRI) modality which is …
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Evaluation of alterations in cardiovascular structure and function in end-stage renal failure.
… we evaluated the cardiovascular sequelae of arterio-venous fistula formation in advanced chronic kidney disease, and the impact of elective arterio-venous fistula ligation following successful renal transplantation. Furthermore, we undertook to evaluate the diagnostic accuracy of …
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Myocardial intermediary metabolism: with special reference to the isolated, contracting, perfused rat heart
… catheterization. By determining the coronary arterio-venous differences of various substrates, Sing and other workers (Goodale, Olson) have been able to describe the overall picture of myocardial metabollism in man and intact experimental animals. This technique dos not, however, allow …
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Biotransformation of blood long-chain fatty acids and oxylipins in peripheral tissue during hemodialysis
… lipidomic study and tested the hypothesis that arterio–venous (A–V) differences in blood LCFAs and oxylipins are present in vivo and sensitive to single HD treatment. Methods: We took arterial and venous blood samples specimens from ESRD patients (n=12) before and after HD and determined LCFAs …
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Specific bio-modeling and analysis techniques at cellular and systems level
… more accurate modeling of digits incorporating arterio-venous anastomoses (AVA) mechanisms that the fingers and toes use for better control of heat transfer.
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Studies of Mammary Amino Acid Transport
… was found to be very small and no significant arterio-venous difference of plasma glutathione was detected across the mammary gland. However, a significant difference in whole blood glutathione was observed. It is possible that glutathione might be acted on by mammary (gamma)-glutamyl …
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Measurement of Cerebral Metabolism and Vascular Function with Magnetic Resonance Imaging
… CMRO2. This method uses the Fick principle of arterio-venous difference for the calculation of CMRO2.and employs phase-contrast MRI for quantitative blood flow measurement and T2-relaxation-under-spin-tagging (TRUST) MRI for venous oxygenation estimation. During this thesis, I conducted several …
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Interrogating and potentiating energy metabolism in the human brain after traumatic brain injury
… increased in some TBI patients. Study IV: I used arterio-venous gradients to measure glucose and lactate delivery to the brain. There are periods after injury when lactate is imported from the circulation despite relatively high brain lactate levels suggesting up-regulation of lactate transport. …
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Pitfalls in Interpreting Umbilical Cord Blood Gases and Lactate at Birth
… on the distribution of veno-arterial and arterio-venous gradients (Δ values) in umbilical cord blood. Validation criteria based on fixed ΔpH and ΔpCO2 values may then exclude correct samples of clinical outliers. Lactate cannot be used for validation of umbilical cord blood samples. A …
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Record review of post-haemodialysis blood results to assess adherence to guidelines for end stage renal disease
… similarly 102/166 (62.5%) for serum phosphate. Arterio-venous fistula or graft is recommended for vascular access for HD and 112/169 (66.27%) patients had either. While all patients should receive erythropoiesis stimulating agents and iron therapy, 110/169 (65.08%) and 104/169 (61.53%) …
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Αιμοδυναμική μελέτη της ταυτόχρονης δημιουργίας εξωτερικής (shunt) & εσωτερικής (fistula) αρτηριοφλεβικής επικοινωνίας στα μηριαία αγγεία σκύλου: Πειραματική εργασία
… two methods are: a) The "shunt" or external arterio-venous (Αν) communication and b) The "Fistula" or internal A-V communication. Following this, the basic principles that govern the blood flow in the vessels are mentioned and the hemodynamic behavior of the A-V communication is analyzed. …
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EVALUATION OF THE IMPORTANCE OF SMOOTH MUSCLE TO THE DEVELOPMENT OF FUNCTIONAL TISSUE ENGINEERED BLOOD VESSELS
… TEBV grafts were implanted either as arterio-venous fistula (AVF) or as an arterial interposition (AI) graft in an ovine model. Two months post-implantation, retrieved AVF grafts demonstrated no signs of infection, aneurysm or dilation over time indicating their potential clinical …
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Investigation of novel biomarkers associated with renal disease
… To assess the association between retinal arteriolar and venular calibre, arterio-venous ratio (AVR), fractal dimension, and tortuosity were measured and their associations with estimated glomerular filtration rate (eGFR) and urinary albumin to creatinine ratio (ACR) were tested in …
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Does smoking impact on the association between oxidative stress and vascular function in young normotensives? the African-Predict study
… between black and white groups, whereas CRAE and arterio-venous ratio (AVR) were higher in white than in black non-smokers. In single regression analysis, ROS correlated positively with the CRVE (r=0.29; p=0.014) and inversely with AVR (r=-0.37; p=0.002) in black smokers only. After partially …
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Numerical methods for computationally efficient and accurate blood flow simulations in complex vascular networks: Application to cerebral blood flow
… of cerebral blood flow, with emphasis on the venous side. We develop a methodology that, departing from the high-resolution MRI data obtained from a novel in-vivo microvascular imaging technique of the human brain, allows to reconstruct detailed subject-specific cerebral networks of specific …
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Computational modelling of global haemodynamics and its interaction with cerebrospinal fluid and brain dynamics with application to essential hypertension
… thesis: firstly, the potential link between the venous circulation and several neurological pathologies, secondly arterial hypertension. The work presented in this thesis consists of a multiscale model of the global, arterio-venous circulation in the entire human body. The present model …
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Advanced Studies in Veterinary Anatomy: Angiogenesis in Caprine Reproductive Organs of Non-Pregnant and Pregnant Normal and Swainsonine-Treated Does
… estrous cycle. During pregnancy, this arterio-venous arrangement may transfer luteotropic substances from uterus to ovary, which may serve in maternal recognition of pregnancy and fit the fact that the goat is CL dependent throughout gestation. In some cases of triplets, the size of the …