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 20 of 86 for “"negative pressure"”.
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Myocardial Topical Negative Pressure
… microvasular blood flow by applying a topical negative pressure source directly onto the myocardium. Topical negative pressure is a relatively new wound healing technique. When used in wound therapy, topical negative pressure has been shown to increase microvascular blood flow, to stimulate …
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The biomechanics of negative-pressure wound therapy
Despite the success of negative-pressure wound therapy, its mechanism of action remains unclear. The common perception that it reduces tissue pressure and increases perfusion has recently been challenged following the observation that tissue necrosis can be caused as a result of its application. A …
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Development of a simplified negative pressure wound device
… a successful, chronic wound treatment, known as negative pressure wound therapy (NPWT), has not been readily used, although many patients would benefit. Aiming to expand this therapy, the viability of inexpensive, purely mechanical simplified negative pressure wound therapy (sNPWT) systems is …
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Development of fMRI compatible lower body negative pressure system
The lower body negative pressure (LBNP) system provides a controlled, measured orthostatic stress to the cardiovascular system, which can be used with a magnetic resonance imaging (MRI) machine to study cardiovascular and cerebrovascular responses to graded LBNP. In the past, even though functional …
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Tolerance to Lower Body Negative Pressure: Effects of Sex and Sufentanil
… to a simulation of hemorrhage (lower-body negative pressure; LBNP). METHODS: Participants for both studies were instrumented for continuous measurements of heart rate (electrocardiography), beat-to-beat blood pressure (finometer), and muscle sympathetic nerve activity (microneurography: …
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INTERACTION OF NEGATIVE PRESSURE WOUND THERAPY AND COMPOSITE BIOMATERIALS FOR SPINAL FUSION
… 2014, Rajaee et al. 2012, Stranges et al. 2009). Negative pressure wound therapy (NPWT) or vacuum assisted closure (VAC) has shown superior clinical results when used in combination with biomaterials to accelerate wound healing in treating complicated wound with exposed bone (Wijewardena et al. …
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Negative Pressure Wound Therapy - Effects on Sternotomy Wounds and the Intrathoracic Organs
Negative pressure wound therapy (NPWT) has been widely adopted for the treatment of deep sternal wound infections due to its excellent clinical outcome. However, the mechanisms of action and effects on hemodynamics have not been thoroughly elucidated. The aims of the work presented in this thesis …
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Designing a Localized Lower Body Negative Pressure Garment for Long-Duration Spaceflight
Lower Body Negative Pressure (LBNP) has long been explored as a countermeasure to the physiological deconditioning and orthostatic intolerance associated with prolonged microgravity exposure. Traditional LBNP systems, however, are large, stationary devices that require astronauts to remain immobile …
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Partial Gravity Load Simulation Using Mechanical Off-Loading and Lower Body Negative Pressure
… this thesis evaluates a collapsible lower body negative pressure (LBNP) suit as a wearable countermeasure for micro and partial gravity environments. By applying negative pressure to the lower body, the suit helps restore the mechanical loading and hydrostatic fluid gradients typically provided …
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Design and development of a smart, self-contained, portable negative pressure wound therapy device
Negative pressure wound therapy (NPWT) is a commonly used treatment in which the application of a low vacuum (-20kPa) is used to accelerate the recovery of chronic, hard-to-heal wounds. Costs of chronic wounds such as diabetic foot ulcers are estimated to be $25 billion, with 6.5 million patients …
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Negative Pressure Wound Therapy - Mechanisms of Action and Protecting Exposed Blood Vessels in the Wound Bed
… 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 and wound fluid removal were also studied. Tissue pressure 0.1 cm from the wound edge decreased while an …
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Does altering brachial artery tone with lower-body negative pressure and flow-mediated dilation affect arterial stiffness?
… sympathetic stimulation induced via lower-body negative pressure (LBNP). Similarly, the impact of flow-mediated dilation (FMD) on brachial artery compliance and distensibility remains unresolved, hi addition, before such measures can be used as prognostic tools, it is important to investigate …
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Adaptive Control Strategies for Mitigating Spaceflight Fluid Shifts Using Lower Body Negative Pressure and Non-Invasive Fluid Shift Sensing
… the feedback from these sensors into Lower Body Negative Pressure (LBNP) chambers could allow for the development of an adaptive Lower Body Negative Pressure regulation framework. Coaxial RF sensors were designed and characterized using tissue phantoms, and tested in a human subject study …
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A Novel Resistance Exercise Machine for Use in a Lower Body Negative Pressure Box to Counteract the Effects of Weightlessness
… Resistance exercise coupled with lower body negative pressure (LBNP) has been shown to be effective in counteracting some of the deconditioning related problems. This thesis describes the development of a compact and effective resistance exercise machine that works within an existing …
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Influence of an Irrigation System Utilizing Apical Negative Pressure on Bacterial Elimination during Endodontic Therapy: a prospective randomized clinical study
… root canal debridement using an apical negative pressure irrigation system, EndoVac<sup>TM </sup>(EVI), have demonstrated promising results canals. We conducted a randomized, controlled, prospective <em>in-vivo</em> clinical investigation comparing the efficacy of EVI to standard needle …
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Cefazolin Concentration in Surgically Created Wounds Treated with Negative Pressure Wound Therapy Compared to Surgically Created Wounds Treated with Nonadherent Wound Dressings
… from surgically created wounds treated with negative pressure wound therapy to those collected from surgically created wounds treated with nonadherent dressings. The study design was a prospective, controlled, experimental study. The animal population included 12 female spayed beagles. We …
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Reducing booster-pump-induced contaminant intrusion in Indian water systems with a self-actuated, back-pressure regulating valve
… is to supplement the water system's pressure by using a household, or residential, booster pump. When such booster pumps are directly connected to the water utility's supply pipe, without an underground isolation tank (sump), they often induce negative pressure in the supply pipe …
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Continuous High-Pressure Negative Suction Drain: New Powerful Tool for Closed Wound Management: Clinical Experience
… wound healing, and even flap failures. The negative-pressure wound therapy has been described in detail in the literature to assist open chronic/complex wound closure in reconstructive surgery. However, the negative-pressure wound therapy was difficult to be applied under the incisional …
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Terapia Por Pressão Negativa (TPN) vs.Terapia Convencional em Ferimentos Complexos - Revisão sistemática
NEGATIVE PRESSURE THERAPY (TPN) VS. CONVENTIONAL THERAPY IN COMPLEX INJURIES - SYSTEMATIC REVIEW. With the increase in longevity associated to incapacitating diseases, and also to the ability to keep alive severe patients, the prevalence of complex wounds has increased in the infirmary beds and …
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An evaluation of the compliance to the ventilation aspects of airborne infectious disease control in Cape Town, South Africa
… IRs with regards to air changes per hour (ACH), negative pressure ventilation with relation to the surrounding areas and appropriate discharge of air outdoors or via filters before recirculation was measured using standard objective engineering methods. Results: 19 IRs in 8 ECs were evaluated, …
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