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Author: Roland N. Pittman
Publisher: Biota Publishing
ISBN: 1615047212
Category : Medical
Languages : en
Pages : 117
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Book Description
This presentation describes various aspects of the regulation of tissue oxygenation, including the roles of the circulatory system, respiratory system, and blood, the carrier of oxygen within these components of the cardiorespiratory system. The respiratory system takes oxygen from the atmosphere and transports it by diffusion from the air in the alveoli to the blood flowing through the pulmonary capillaries. The cardiovascular system then moves the oxygenated blood from the heart to the microcirculation of the various organs by convection, where oxygen is released from hemoglobin in the red blood cells and moves to the parenchymal cells of each tissue by diffusion. Oxygen that has diffused into cells is then utilized in the mitochondria to produce adenosine triphosphate (ATP), the energy currency of all cells. The mitochondria are able to produce ATP until the oxygen tension or PO2 on the cell surface falls to a critical level of about 4–5 mm Hg. Thus, in order to meet the energetic needs of cells, it is important to maintain a continuous supply of oxygen to the mitochondria at or above the critical PO2 . In order to accomplish this desired outcome, the cardiorespiratory system, including the blood, must be capable of regulation to ensure survival of all tissues under a wide range of circumstances. The purpose of this presentation is to provide basic information about the operation and regulation of the cardiovascular and respiratory systems, as well as the properties of the blood and parenchymal cells, so that a fundamental understanding of the regulation of tissue oxygenation is achieved.
Author: Roland N. Pittman
Publisher: Biota Publishing
ISBN: 1615047212
Category : Medical
Languages : en
Pages : 117
Get Book Here
Book Description
This presentation describes various aspects of the regulation of tissue oxygenation, including the roles of the circulatory system, respiratory system, and blood, the carrier of oxygen within these components of the cardiorespiratory system. The respiratory system takes oxygen from the atmosphere and transports it by diffusion from the air in the alveoli to the blood flowing through the pulmonary capillaries. The cardiovascular system then moves the oxygenated blood from the heart to the microcirculation of the various organs by convection, where oxygen is released from hemoglobin in the red blood cells and moves to the parenchymal cells of each tissue by diffusion. Oxygen that has diffused into cells is then utilized in the mitochondria to produce adenosine triphosphate (ATP), the energy currency of all cells. The mitochondria are able to produce ATP until the oxygen tension or PO2 on the cell surface falls to a critical level of about 4–5 mm Hg. Thus, in order to meet the energetic needs of cells, it is important to maintain a continuous supply of oxygen to the mitochondria at or above the critical PO2 . In order to accomplish this desired outcome, the cardiorespiratory system, including the blood, must be capable of regulation to ensure survival of all tissues under a wide range of circumstances. The purpose of this presentation is to provide basic information about the operation and regulation of the cardiovascular and respiratory systems, as well as the properties of the blood and parenchymal cells, so that a fundamental understanding of the regulation of tissue oxygenation is achieved.
Author: Kusal Das
Publisher: BoD – Books on Demand
ISBN: 1789848288
Category : Medical
Languages : en
Pages : 146
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Book Description
The molecular deprivation of oxygen is manifested by hypoxia, a deficiency of oxygen and anoxia, or the absence of oxygen supply to the tissues. This book entitled Hypoxia and Anoxia will cover a broad range of understanding on hypoxia and anoxia from molecular mechanisms to pathophysiology. Hypoxia and anoxia stimulate multiple systems through specific cell signal transduction pathways and regulate several transcriptional factors like HIF-1, REST to encode genes for VEGF, Epo, etc. This book will also highlight different types of hypoxia and anoxia along with their impact on apoptosis, cardiovascular pathophysiology, and glucose regulatory mechanisms. This book will be a ready reckoner to give a deep understanding of the oxygen-sensing environment in vivo for researchers, academicians, and clinicians throughout the world.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309044383
Category : Medical
Languages : en
Pages : 178
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Book Description
This book summarizes current understanding of the scientific, clinical, and technical issues surrounding the use of contact lenses. It discusses the special occupational conditions experienced by military personnel, particularly in extreme environments, that give rise to the question of whether or not to use contact lenses. Experts in optometry, ophthalmology, visual psychophysics, and engineering describe recent developments in design and use; and representatives of the military services provide examples of actual situations in aerospace settings. Considerations in Contact Lens Use Under Adverse Conditions will be of particular interest to those involved in the design of contact lenses and those responsible for occupational safety and health matters in the private sector.
Author: Marilyn J. Cipolla
Publisher: Biota Publishing
ISBN: 1615047239
Category : Medical
Languages : en
Pages : 82
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Book Description
This e-book will review special features of the cerebral circulation and how they contribute to the physiology of the brain. It describes structural and functional properties of the cerebral circulation that are unique to the brain, an organ with high metabolic demands and the need for tight water and ion homeostasis. Autoregulation is pronounced in the brain, with myogenic, metabolic and neurogenic mechanisms contributing to maintain relatively constant blood flow during both increases and decreases in pressure. In addition, unlike peripheral organs where the majority of vascular resistance resides in small arteries and arterioles, large extracranial and intracranial arteries contribute significantly to vascular resistance in the brain. The prominent role of large arteries in cerebrovascular resistance helps maintain blood flow and protect downstream vessels during changes in perfusion pressure. The cerebral endothelium is also unique in that its barrier properties are in some way more like epithelium than endothelium in the periphery. The cerebral endothelium, known as the blood-brain barrier, has specialized tight junctions that do not allow ions to pass freely and has very low hydraulic conductivity and transcellular transport. This special configuration modifies Starling's forces in the brain microcirculation such that ions retained in the vascular lumen oppose water movement due to hydrostatic pressure. Tight water regulation is necessary in the brain because it has limited capacity for expansion within the skull. Increased intracranial pressure due to vasogenic edema can cause severe neurologic complications and death.
Author: Stanley F. Malamed
Publisher: Elsevier Health Sciences
ISBN: 0323171257
Category : Medical
Languages : en
Pages : 570
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Book Description
Be prepared to handle life-threatening dental emergencies! Medical Emergencies in the Dental Office, 7th Edition helps you learn the skills needed to manage medical emergencies in the dental office or clinic. It describes how to recognize and manage medical emergencies promptly and proactively, and details the resources that must be on hand to deal effectively with these situations. This edition includes new guidelines for drug-related emergencies, cardiac arrest, and more. Written by respected educator Dr. Stanley Malamed, this expert resource provides dental professionals with the tools for implementing a basic action plan for managing medical emergencies. "It successfully fulfils its aim of stimulating all members of the dental team to improve and maintain their skills in the effective prevention, recognition and management of medical emergencies." Reviewed by European Journal of Orthodontics, March 2015 "...very easy to read and provides a very comprehensive reference for a variety of medical emergencies." Reviewed by S.McKernon on behalf of British Dental Journal, July 2015 - A logical format reflects the way emergencies are encountered in a dental practice, with chapters organized by commonly seen clinical signs and symptoms, such as unconsciousness or altered consciousness, respiratory distress, seizures, drug-related emergencies, chest pain, and cardiac arrest. - Step-by-step procedures include detailed, numbered instructions for stabilizing and treating victims (PCABD) in common medical emergencies. - Full-color illustrations demonstrate emergency techniques in realistic clarity. - Summary tables and boxes make it easy to find essential concepts and information. - Quick-reference algorithms in the appendix include step-by-step diagrams showing the decision-making process in common emergency situations. - A differential diagnosis chapter ends each of the book's parts on common emergencies. - UPDATED content includes the most current guidelines for drug-related emergencies, unconsciousness, altered consciousness, and cardiac arrest as well as protocols for obstructed airway management. - UPDATED PCABD boxes reflect the American Heart Association's new sequence of steps for stabilizing and treating victims with an easy-to-remember acronym: Positioning, Circulation, Airway, Breathing, and Definitive Management. - UPDATED! Emergency drug and equipment kit instructions help you assemble emergency kits and ensure that your dental office has safe, current materials on hand.
Author: Hans-Jürgen Machulla
Publisher: Springer Science & Business Media
ISBN: 9780792355298
Category : Medical
Languages : en
Pages : 208
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Book Description
Reports observations and findings using PET, SPECT, and other imaging technologies to identify tissue that is not getting sufficient oxygen, which can enhance the development and progress of disease and increase the resistance of tumors to radiation therapy. Nine papers from a workshop in Tubingen-Buhl, Germany in 1995 consider such aspects as the biology of technetium-based hypoxic tissue localizing compounds, molecular design approaches of hypoxia tracers, pre-clinical and clinical studies of quantifying hypoxia with radiolabeled fluoromisonidazole, and evaluating hypoxia in diabetes. Annotation copyrighted by Book News, Inc., Portland, OR
Author:
Publisher: Elsevier
ISBN: 0080497195
Category : Science
Languages : en
Pages : 867
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Book Description
The ability of cells to sense and respond to changes in oxygenation underlies a multitude of developmental, physiological, and pathological processes. This volume provides a comprehensive compendium of experimental approaches to the study of oxygen sensing in 48 chapters that are written by leaders in their fields.
Author: David R. Dantzker
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 712
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Book Description
Provides current insights into critical abnormalities of the heart and lungs. The 3rd Edition includes chapters on microcirculation, regional distribution of blood flow, methods of increasing oxygen delivery, septic shock, environmental lung injury, and the effects of high pressure environments. Much more focused toward the critical care aspects of cardiopulmonary disorders.
Author: Elena Loreti
Publisher: MDPI
ISBN: 3036501487
Category : Science
Languages : en
Pages : 288
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Book Description
Molecular oxygen deficiency leads to altered cellular metabolism and can dramatically reduce crop productivity. Nearly all crops are negatively affected by a lack of oxygen (hypoxia) due to adverse environmental conditions such as excessive rain and soil waterlogging. Extensive efforts to fully understand how plants sense oxygen deficiency and their ability to respond using different strategies are crucial to increase hypoxia tolerance. Progress in our understanding has been significant in recent years. This topic certainly deserves more attention from the academic community; therefore, we have compiled a series of articles reflecting the advancements made thus far.
Author: Robert Kliegman
Publisher: Elsevier Health Sciences
ISBN: 0323761755
Category : Medical
Languages : en
Pages : 1355
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Book Description
Patients don't present with a disease; they present with symptoms. Using a practical, symptom-based organization, Nelson Pediatric Symptom-Based Diagnosis: Common Diseases and their Mimics, 2nd Edition, offers authoritative guidance on differential diagnosis and treatment of diseases and disorders in children and adolescents, and covers the symptoms you're likely to see in practice, their mimics, and uncommon disorders. Drs. Robert M. Kliegman, Heather Toth, Brett J. Bordini, and Donald Basel walk you through what to consider and how to proceed when faced with common symptoms such as cough, fever, headache, autistic-like behaviors, chronic pain, chest pain, gait disturbances, and much more. - Begins with a presenting symptom and leads you through differential diagnosis and a concise review of treatment recommendations. - Contains more than a dozen new topics including Disease Mimics: An Approach to Undiagnosed Diseases, Autistic-like Behaviors, Shock, Hypertension, Neurocognitive and Developmental Regression, Chronic Pain, Hypertonicity, Movement Disorders, Hypermobility, and more. - Features a new focus on symptoms of rarer diseases that are mimics of more common diseases. - Offers a user-friendly approach to Altered Mental Status such as coma and other CNS disorders, with numerous clinically useful tables and figures to guide clinical decision making in various care settings. - Uses a highly templated format for easy reference and quick answers to clinical questions, with the same consistent presentation in each chapter: History, Physical Examination, Diagnosis (including laboratory tests), Imaging, Diagnosis, and Treatment. - Includes numerous full-color illustrations, algorithms, tables, and "red flags" to aid differential diagnosis. - Serves as an ideal companion to Nelson Textbook of Pediatrics, 21st Edition. Content in this book is referenced and linked electronically to the larger text, providing easy access to full background and evidence-based treatment and management content when you own both references.
