Publications by authors named "Mark T O'Connell"

This article will debate the usefulness of POCT measurements and the contribution microdialysis can make to generating valuable information. A particular theme will be the rarely considered difference between ex vivo sampling, which typically generates only a static measure of concentration, and in vivo measurements that are subject to dynamic changes due to mass transfer. Those dynamic changes provide information about the patients' physiological state.

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The present paper describes a compact point of care (POC) optical device for therapeutic drug monitoring (TDM). The core of the device is a disposable plastic chip where an immunoassay for the determination of immunosuppressants takes place. The chip is designed in order to have ten parallel microchannels allowing the simultaneous detection of more than one analyte with replicate measurements.

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Microdialysis enables the chemistry of the extracellular interstitial space to be monitored. Use of this technique in patients with acute brain injury has increased our understanding of the pathophysiology of several acute neurological disorders. In 2004, a consensus document on the clinical application of cerebral microdialysis was published.

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Purpose: Despite increasing frequency, little evidence guides cholesterol screening in less traditional health care settings, such as rural health fairs.

Methods: The Miller School of Medicine Department of Community Service (DOCS) is a student-run organization providing free basic health care to underserved South Florida communities. We retrospectively reviewed all new patients seen at 2007 DOCS rural fairs to describe their low-density lipoprotein (LDL) and high-density lipoprotein (HDL) values.

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Background: Despite an increased need, residents of rural communities have decreased access to healthcare and oftenpresentuniquehealthcare challenges associated with their rurality. Ensuring medical students receive adequate exposure to these issues is complicated by the urban location of most medical schools. Health fairs (fairs) conducted in rural communities can provide students exposure to ruralhealth;however, it is unknown how participation affects attitudes regarding these issues.

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Objectives: Only half of eligible patients in the United States undergo colorectal cancer (CRC) screening as recommended. Hypothesizing that the medical philanthropy platform may be effective in improving access to CRC screening, we aimed to demonstrate the feasibility of a flexible sigmoidoscopy (FS)-based CRC screening "health fair" for uninsured patients.

Methods: Uninsured patients older than 50 years who had not undergone CRC screening in the preceding 10 years were recruited through local free clinics and health fairs.

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Objectives: Residents of rural communities, especially in the Southeast, have decreased access to health care. Ensuring medical students receive adequate exposure to their issues is complicated by the urban location of most schools. We describe health fairs conducted in rural communities to suggest how having medical students use screening tools can identify patients with risk factors for disease which can offer students the opportunity to learn about rural health issues through patient counseling.

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Secondary insults can adversely influence outcome following severe traumatic brain injury. Monitoring of cerebral extracellular chemistry with microdialysis has the potential for early detection of metabolic derangements associated with such events. The objective of this study was to determine the relationship between the fundamental biochemical markers and neurological outcome in a large cohort of patients with traumatic brain injury.

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Background: Microdialysis continuously monitors the chemistry of a small focal volume of the cerebral extracellular space. Positron emission tomography (PET) establishes metabolism of the whole brain but only for the scan's duration. This study's objective was to apply these techniques together, in patients with traumatic brain injury, to assess the relationship between microdialysis (extracellular glucose, lactate, pyruvate, and the lactate/pyruvate (L/P) ratio as a marker of anaerobic metabolism) and PET parameters of glucose metabolism using the glucose analogue [(18)F]-fluorodeoxyglucose (FDG).

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Following traumatic brain injury (TBI), cascades of inflammatory processes occur. Laboratory studies implicate the cytokines interleukin-1alpha (IL-1alpha) and IL-1beta in the pathophysiology of TBI and cerebral ischemia, whilst exogenous and endogenous interleukin-1 receptor antagonist (IL-1ra) is neuroprotective. We analyzed IL-1alpha, IL-1beta, and IL-1ra in brain microdialysates (100-kDa membrane) in 15 TBI patients.

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In August 2007, the first class of University of Miami Miller School of Medicine (UM) medical students will begin the four-year undergraduate medical education program at the regional medical campus at Florida Atlantic University (FAU) The authors describe how UM and FAU were able to make a successful case to state policymakers for a regional medical campus as a cost-effective approach to expanding undergraduate and graduate medical education opportunities in southeast Florida The authors discuss what motivated UM and FAU to partner to create a regional medical campus, and they describe the challenges that have been encountered since 2004, particularly those relating to delivering a comparable two-year program on two campuses using distance-learning technologies. The opportunities that have resulted from expansion of the regional campus from two to four years are also described, including the development of a new and innovative four-year curriculum emphasizing comprehensive chronic disease management and case-based and patient-centered education using collaborative, small-group student learning communities. UM medical students thus have a choice between two educational tracks.

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Objective: In this study we have used O positron emission tomography, brain tissue oxygen monitoring, and cerebral microdialysis to assess the effects of cerebral perfusion pressure augmentation on regional physiology and metabolism in the setting of traumatic brain injury.

Design: Prospective interventional study.

Setting: Neurosciences critical care unit of a university hospital.

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Background: To provide efficient, quality patient care, physicians must have a fundamental understanding of how the health care delivery system functions and how to appropriately use the various components of this system. As part of the Undergraduate Medical Education for the 21st Century (UME-21) initiative, the University of Miami in partnership with AvMed Health Plans, a nonprofit managed care organization (MCO) developed a longitudinal educational program that prepares all students for medical practice in emerging systems of care.

Methods: The program, which spans the 4-year undergraduate curriculum, incorporates didactic sessions and practical experiences to teach about the clinical, managerial, financial, and ethical aspects of systems-based care.

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Background And Objectives: The Institute of Medicine and the new Accreditation Council for Graduate Medical Education General Essentials have focused attention on the Undergraduate Medical Education for the 21st Century (UME-21) core content area of systems-based care. Through teaching systems-based care, medical students can learn how physicians effectively deliver and coordinate care within the health system. While medical students can be introduced to the organization, financing, and delivery of the health care system through lectures, the principles and practice of systems-based care must be reinforced through structured learning experiences during the clinical (ie, third and fourth) years.

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Background: The health care system in the United States is changing at an ever-increasing rate. Recent reports by the Institute of Medicine raising concerns regarding rates of medical errors and suggesting the need for reengineering of the health care delivery system have focused attention on the need for quality measurement and improvement.

Methods: We abstracted data from final written reports submitted by 18 Undergraduate Medical Education for the 21st Century (UME-21) schools, as well as other materials available from participating UME-21 schools.

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Background: The health care delivery system is experiencing enormous flux. The knowledge and skills sets required of today's physicians include expertise in competency areas that have not been included in the traditional medical curricula. The Undergraduate Medical Education for the 21st Century (UME-21) project was designed to develop innovative curricula that addressed the training necessary for medical students to gain skills required to provide high-quality, accessible, and affordable care in the modern health care environment.

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Microdialysis continuously monitors the chemistry of a small focal volume of the cerebral extracellular space. Conversely, positron emission tomography (PET) establishes metabolism of the whole brain, but only for the duration of the scan. The objective of this study was to apply both techniques to head-injured patients simultaneously to assess the relation between microdialysis (glucose, lactate, lactate/pyruvate [L/P] ratio, and glutamate) and PET (cerebral blood flow [CBF], cerebral blood volume, oxygen extraction fraction (OEF), and cerebral metabolic rate of oxygen) parameters.

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