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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 20 of 42 for “"tonometry"”.
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An exploration of through-the-eyelid tonometry
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Effect of numerical modelling assumptions on the simulated corneal response during Goldmann applanation tonometry
… (IOP) obtained from Goldmann Applanation Tonometry (GAT). However, not much is known about the in uence of corneal material properties, especially in a clinical setting. Several numerical studies have been conducted in an attempt to quantify the in uence of corneal material properties on …
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THE UTILITY OF PULSE PRESSURE MEASURED BY RADIAL ARTERIAL TONOMETRY IN DETERMINING CARDIOVASCULAR DISEASE IN ADULTS
… and CHF. Pulse wave indices from radial arterial tonometry may be superior measures of arterial stiffness sequela compared to PPb. Relations of increased PPr with increased LVM in a cross-sectional was studied after adjustment for PPb. Second, relations of PPr with incident CHF over 4 years, was …
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Evaluation of Ocular Pulse Amplitude-related Parameters measured by Dynamic Contour Tonometry and Ocular Blood Flow Analyzer
… design. OPA was measured using dynamic contour tonometry (DCT). Pulse amplitude (PA), pulse volume (PV), and pulsatile ocular blood flow (POBF) were measured using ocular blood flow analyzer (OBFA). Intraocular pressure (IOP) was measured by Goldmann applanation tonometry (GAT), DCT and OBFA. …
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Vergleich der gastralen mit der ösophagealen Tonometrie bei Patienten mit akuten kardiovaskulären Erkrankungen
BACKGROUND: Gastric PCO2 measured by balloon tonometry can estimate the adequacy of splanchnic perfusion. However, enteral feeding and gastric content can interfere with gastric PCO2 assessment. Tonometry in other sites of the body could avoid these problems. We therefore tested the hypothesis that …
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In-vivo-and in-vitro evaluation of the 5 French neonatal gastric tonometer
Introduction - Gastrointestinal tonometry has been widely used in adult practice for the early detection of shock and multi-organ failure. Its application in paediatrics has been limited by unsuitably large tonometers and doubt about the accuracy of measurements when saline is used as a tonometric …
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Intramukosale pCO2-Tonometrie des Magens als Prognosefaktor für das Überleben von kardiologischen Intensivpatienten mit beatmungspflichtiger Linksherzdekompensation bzw. kardiogenem Schock
… inflammatory syndrome (SIRS) and sepsis. Gastric tonometry is a low invasive monitoring technique assessing gastric prCO2 and CO2-gap, thus providing an integrative indicator for the perfusion, oxygenation and cellular energy metabolism of the gastrointestinal tract. Several studies proved the …
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An exploration of through-the-eye intraocular pressure measurement device
… times throughout the day. A through-the-eyelid tonometry method is proposed to address the deficiencies of the previous techniques. Two through-the-eyelid tonometers are designed, and parts of the prototypes are built.
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Design and construction of a novel transpalpebral ophthalmic tonometer
… herein -- unlike traditional Goldman applanation tonometry which requires the use of ophthalmic anesthetics and complex diagnostic equipment- describes a novel lOP measurement method consisting of concavation of the cornea or sclera through the palpebra superior by the spherical tip of an …
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Entwicklung eines Gerätes zur Druckmessung an der Aachener Keratoprothese
… rigid and inflexible, which prevents indirect tonometry with common methods. This study confirms that the Aachen-KPro allows measurements of the intraocular pressure (IOP) due to its flexible optical part with a modified Schiotz tonometer. Methods: The Aachen-KPro was placed in a special …
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Cardiovascular Risk, Remote Ischemic Postconditioning, and Endothelial Ischemia-Reperfusion Injury
… function was measured using peripheral arterial tonometry (EndoPAT 2000, Itamar Medical Inc.) before and after 20 minutes of left arm, brachial artery ischemia, with and without the induction of rIpost (three, 5-minute bouts of right arm ischemia and reperfusion at 220 mmHg). Remote Ipost …
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Influence of Cardiovascular Risk factors on Remote Ischemic Preconditioning
… 3-5 risk factors) were studied. Digital arterial tonometry (EndoPAT 2000, Itamar Medical Inc.) was used to assess microvascular endothelial vasodilation during reactive hyperemia before and after 65 min of left arm reperfusion injury (20 min brachial artery ischemia followed by 45 min reperfusion) …
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Investigation of ultrasound-measured blood flow related parameters in radial and ulnar arteries
… AWM and compared with the waveform from a tonometry.<br/><br/>FR and WSR were both found to be overestimated by up to 50%, mainly due to the beam-vessel angle in the PW Doppler ultrasound. Measurement of the vessel diameter and assumption of the blood flow direction can also influence the …
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ACUTE EFFECTS OF LONG DISTANCE RUNNING ON C-REACTIVE PROTEIN AND ARTERIAL STIFFNESS
… <strong>METHODS: </strong>Applanation tonometry was used to measure aortic BP, AIx and PWV in 12 endurance athletes (36±2 yr) approximately 18 hours before and 24 hours after an ULT or MAR. Plasma CRP, resting BP, and LF:HF ratio were also measured. Intensity and pacing were quantified …
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PRETERM BIRTH, PHYSICAL ACTIVITY, AND ARTERIAL STIFFNESS IN YOUNG ADULTS
… Arterial stiffness was assessed via applanation tonometry from which augmentation index (AI) and AI at heart rate of 75 (AI75) were examined. Physical activity (PA) was assessed via questionnaire and past year average total hours per week (TOT-hrs), vigorous hours per week (Vig-hrs; PA > 6 METs), …
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Association of Aortic Vascular Stiffness with Epicardial and Pericardial Adipose Tissues on 64-Multidetector Computed Tomography : In Relation with Coronary Atherosclerosis
… velocity (PWV) was measured using SphygmoCor tonometry. EAT and total thoracic adipose tissue (TAT) volumes were measured using MDCT. PAT was calculated as TAT – EAT. The highest tertile of EAT (≥ 111 ml) and PAT (≥ 103 ml) were defined as significant adipose tissue depots. RESULTS: PWV was …
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Noninvasive assessment of cardiovascular health
… brachial and radial pressures were measured by tonometry and velocities at corresponding locations were measured by ultrasound. Reasonable agreement is found between the measured pressure and velocity curves and the reconstructed ones. Invasive measurements of hemodynamic parameters are …
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Impact of Prolonged Sitting on Central Hemodynamics: Role of Intermittent Pneumatic Compression Therapy
… and after sitting using carotid applanation tonometry coupled with oscillometry performed on left upper-thigh. For mechanistic insight, intermittent pneumatic compression (IPC) was applied during sitting (i.e., 3, 120 mmHg compression cycles per minute, 30 mins on/off) in a sub-set (N=9). …
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Cannabinoids: A Novel Treatment Strategy for Retinal Neurodegenerative Disorders
… mm Hg in the operated eye, measured via Goldmann tonometry under sedation. Retinal damage was induced by injecting NMDA (2 µl of 10 mM) intravitreally in Sprague-Dawley rats. In other groups O-1812 (2 mM) and O-2545 (2mM) were co-injected with NMDA. Electroretinograms (ERG) were recorded at …
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Central blood pressure
… were obtained from blood pressure cuffs, radial tonometry and a servo-controlled finger cuff. To address objective 4 additional measurements of ventricular and arterial mechanics where made using ultrasound and magnetic resonance imaging.
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