Analytical, Diagnostic and Therapeutic Techniques and Equipment Commons^™

Effects Of Acute Intracranial Pressure Changes On Optic Nerve Head Morphology In Humnans And Pig Model, Sachin Kedar

Theses & Dissertations

The optic nerve head (ONH) is located at the interface of intracranial and intraocular compartments. It is comprised of lamina cribrosa (LC), a fenestrated connective tissue tethered to the posterior sclera across the scleral canal. Since LC is exposed to intraocular pressure (IOP) anteriorly and intracranial pressure (ICP) posteriorly, it is an ideal site for noninvasively detecting intracranial pressure (ICP) fluctuation. We hypothesized that the pressure differential between IOP and ICP across LC, will determine LC position and meridional diameter of scleral canal (also called Bruch’s membrane opening- BMOD). We tested our hypothesis in 19 human subjects undergoing medically necessary …

Evaluation Of The Role Of Microvascular Pathology On Peripheral Artery Disease, Constance Mietus

Theses & Dissertations

Background: Peripheral Artery Disease (PAD) begins with atherosclerotic narrowing of arteries, including those that supply the legs. Individuals with PAD experience pain during walking, which becomes increasingly limiting. Studies from our group and others have shown that a myopathy is present in the skeletal muscle of PAD patients, and is characterized by myofiber degeneration, fibrosis, and remodeling of vessels ranging from 50 – 150 mm in diameter. However, microvascular pathology, particularly of the smallest microvessels (5 – 15 mm in diameter) remains poorly characterized. Furthermore, little is known about the relationships between microvascular architecture, microperfusion, and patient walking performance. We …

A Study Of Acoustically Activated Nanodroplets, Songita Choudhury

Theses & Dissertations

Current treatment of acute myocardial infarction (AMI), which is the main pathophysiological event leading to death in the United States, has advanced considerably with the introduction of emergent percutaneous interventions, but there remains an urgent need for novel techniques to rapidly and accurately detect infarcted or ischemic tissue that results from AMI. Ultrasound contrast agents, also known as microbubbles (MB), have become commonplace in echocardiography. However, MBs are purely intravascular tracers and unable to cross endothelial barriers due to size. The limitations of MBs, namely size and short circulation times within the human body, led to the development of phase-change …

Cervical Spine Angles, Craniocervical Posture, Neck Length, And Oropharyngeal Airway Analyses Of Sleep Apnea Patients In Both Supine And Upright Positions: A Retrospective 3-D Imaging Study, Brian Tuan Luong

Theses & Dissertations

Obstructive sleep apnea (OSA) is one of the most common respiratory disorders. Previous airway studies of OSA subjects have largely relied on 2-D radiographs.

The purpose of this study is to use 3-D imaging to the analyze the relationships among cervical spine angles, craniocervical posture, cervical spine length and the oropharyngeal airway volume in OSA patients in both the supine and upright positions.

Twenty-eight OSA subjects with 3-D imaging were included. Airway, craniocervical posture, spine angles, and spine length were assessed using Dolphin 11.8. Correlation analyses were utilized to detect associations among the recorded and measured variables. Mean differences were …