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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 119 for “"catheters"”.
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The Development of a Computational Model of Thrombosis in Hemodialysis Catheters
… of blood-contacting devices such as hemodialysis catheters. Computer simulation of TE can provide understanding of the process and can facilitate the design of more effective devices. Previous work conducted at BYU successfully modeled TE in a simple, two-dimensional flow cell design by adding …
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Flow optimization of ventricular catheters for shear stress-induced death of astrocytes
… coupled with the fluid dynamics of ventricular catheters and cerebrospinal fluid (CSF). Recent studies have shown that glial tissue, which is mainly comprised of astrocytes, is the major contributor to obstruction. Impeding glial tissue formation should then be the foremost goal of the …
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Evaluation of Prototype Cell Delivery Catheters Using Agarose Gel and Cell Culture Experiments
… However damage to tissues during insertion of catheters, release of air in the brain and consequent backtracking of dye are some disadvantages with this mode of treatment. We evaluated prototype cell delivery catheters (each with outer and inner catheter) developed to minimize these …
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Axial, flexural and torsional rigidities of two-dimensional braided fibre composite medical catheters
… development of optimal rigidity cardiovascular catheters. To begin, the axial, torsional and flexural rigidities of existing medical catheters were reviewed and measured. A model to predict the longitudinal tensile and in-plane shear moduli of 2D braided structures, needed for the calculations …
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Dwell Time of Peripheral Intravenous Catheters and Incidence of Phlebitis: A Randomized Controlled Study
… a sample of acute hospitalized patients whose IV catheters are changed at 48 hours, at 72 hours, and over 72 hours.<br> 3. To identify the incidence of phlebitis with each sample subgroup.</p>
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Phlebitis Rates in Trauma Patients: Peripheral Intravenous Catheters Started In or Outside the Emergency Department
… About 150 million peripheral intravenous catheters (PIVC) are inserted in the United States each year with phlebitis rates reported between 5% and 70%. Many PIVCs are started on trauma patients, but the rate of phlebitis in trauma patients whether the PIVC is started outside the emergency …
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The Effect of Early Removal of Urinary Catheters on Establishing Normal Voiding Patterns in Postoperative Urology Patients
… were randomly assigned to either group I where catheters were removed at 6 am, or group II where the catheters were removed at midnight. The time between catheter removal and discharge was significantly (p=0.002) shorter for the midnight group compared to the 6 am group. There were no other …
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Empowering Patients with Central Venous Catheters: Utilizing Evidence-Based Video-Assisted Education to Reduce Central Line-Associated Bloodstream Infections
<p>An evidence-based Central Venous Catheter (CVC) dressing change video was created to enhance patient independence, and to increase resource efficiency among nursing staff in an inpatient pediatric setting in which Central Line-Associated Bloodstream Infection (CLABSI) rates were rising. …
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DYNAMIC SURFACES FOR URINARY CATHETERS: THE EFFECT OF POLY (GLYCEROL SEBACATE CITRATE) COMPOSITION ON DEGRADATION, ENCRUSTATION RESISTANCE AND BACTERIAL RESPONSE
Encrustation and blockage of urinary catheters, caused by the formation of crystalline biofilms, has been a problem since their invention more than 90 years ago. This thesis addresses the issue via a biomaterials approach, specifically, utilising poly glycerol sebacate citrate (PGSC) produced …
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Bacteriology and antibiotic sensitivity patterns of urine in urology patients with indwelling urinary catheters at the University Teaching Hospital in Lusaka, Zambia.
… present in urine of patients with indwelling catheters at UTH and the aim is be to bring down the prevalence of CAUTI at the institution with the knowledge of the antibiotic sensitivity of pathogens isolated. The study was a descriptive cross-sectional which was conducted at UTH over a period …
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Bacteriuria as a Precursor of Intracatheter Encrustation
… complications could be eliminated by changing catheters before obstruction occurred due to encrustation.</p> <p>It was the purpose of this study to: 1) explore some indications for catheter change, 2) determine if encrustation of urinary catheters necessitates catheter change, and 3) estimate …
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Standards of Care and Practice to Reduce Catheter-Associated Urinary Tract Infections
… supports decreasing the number of indwelling catheters and reducing the number of day’s catheters remain inserted, the persistent infection rates demonstrate the need for continued improvements in hospital processes and nursing practices related to urinary catheters. </p>
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HAP Prevention: One Tracheostomy at a Time
… on the importance of discarding used suction catheters. The intention of this project is to provide awareness and education on the negative implications of re-using a saved one-time use tracheal suction catheters. As a future CNL, through the competency as the Clinician, designating and …
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Design and Development of an Anti-fouling Urinary Catheter Utilizing Active Surface Deformation
<p>There are over 30 million Foley urinary catheters used annually, and the greatest problem with Foley catheters is catheter-associated urinary tract infections (CAUTIs). CAUTIs are the number one cause of hospital-acquired infections and make up to 40% of nosocomial infections. Biofilms on …
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The effects of indwelling transurethral catheterization and tube cystostomy on urethral anastomoses in dogs
… Group U dogs (n=5) received transurethral catheters. Group C dogs (n=5) received tube cystostomy catheters, and Group B dogs (n=5 ) had both a transurethral catheter and a cystostomy tube placed. All dogs had catheters maintained with a closed urine collection system for seven days. Dogs …
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Echogenic Biomaterials for Medical Ultrasound Tracking
… Patients with peripherally inserted central catheters (PICCs) are routinely discharged with the catheters in place. PICCs, only capable of being tracked through x-ray imaging, will routinely experience complications due to thrombosis or accidental dislodgement from poor at-home care. …
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Application and Development of Algebraic Reconstruction Algorithms for High Dose Rate Brachytherapy Gel Dosimetry with Optical Computed Tomography Readout
… a dosimeter, but the insertion of brachytherapy catheters into the gel cause streak artifacts in the reconstructed dose distributions, ruining the dosimeter’s accuracy. The objective of this work was to investigate the feasibility of using radiochromic gel dosimeters for HDR brachytherapy …
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The Effects of Carbadox, a Synthetic Antimicrobial Agent, on Bile Acid Metabolism in The Domestic Pig
… technique was developed to place indwelling catheters into the hepatic portal vein (HP) which allowed multiple sampling of the blood and did not affect the performance of the pigs. An indwelling catheter was also placed in the anterior vena cava vein (VC).
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A Study to Demonstrate the Immediate Destination of an Embolus Formed in the Lumen of a Peripheral Venous Catheter
… the frequent use of intravenous polyethylene catheters, (2) experimental studies that showed that clots were formed around intravenous catheters, (3) the evidence that intravenous catheters predispose to venous thrombosis, and (4) probable relationship of multiple small emboli from catheter …
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