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Respiratory Rate
The respiratory rate is the rate at which breathing occurs; it is set and controlled by the respiratory center of the brain. A person's respiratory rate is usually measured in breaths per minute. Measurement The respiratory rate in humans is measured by counting the number of breaths for one minute through counting how many times the chest rises. A fibre-optic breath rate sensor can be used for monitoring patients during a magnetic resonance imaging scan. Respiration rates may increase with fever, illness, or other medical conditions. Inaccuracies in respiratory measurement have been reported in the literature. One study compared respiratory rate counted using a 90-second count period, to a full minute, and found significant differences in the rates.. Another study found that rapid respiratory rates in babies, counted using a stethoscope, were 60–80% higher than those counted from beside the cot without the aid of the stethoscope. Similar results are seen with animals when t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breathing
Breathing (spiration or ventilation) is the rhythmical process of moving air into ( inhalation) and out of ( exhalation) the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen. All aerobic creatures need oxygen for cellular respiration, which extracts energy from the reaction of oxygen with molecules derived from food and produces carbon dioxide as a waste product. Breathing, or external respiration, brings air into the lungs where gas exchange takes place in the alveoli through diffusion. The body's circulatory system transports these gases to and from the cells, where cellular respiration takes place. The breathing of all vertebrates with lungs consists of repetitive cycles of inhalation and exhalation through a highly branched system of tubes or airways which lead from the nose to the alveoli. The number of respiratory cycles per minute is the breathing or respiratory rate, and is one of the fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxygen Saturation
Oxygen saturation (symbol SO2) is a relative measure of the concentration of oxygen that is Dissolution (chemistry), dissolved or carried in a given medium as a proportion of the maximal concentration that can be dissolved in that medium at the given temperature. It can be measured with a dissolved oxygen probe such as an oxygen sensor or an optode in liquid media, usually water. The standard unit of oxygen saturation is percent (%). Oxygen saturation can be measured regionally and noninvasively. Artery, Arterial oxygen saturation (SaO2) is commonly measured using pulse oximetry. Tissue saturation at peripheral scale can be measured using near-infrared spectroscopy, NIRS. This technique can be applied on both muscle and brain. In medicine In medicine, oxygen saturation refers to ''oxygenation'', or when oxygen molecules () enter the Tissue (biology), tissues of the body. In this case blood is oxygenated in the lungs, where oxygen molecules travel from the air into the blood. O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platypnea
Platypnea or platypnoea is shortness of breath (dyspnea) that is relieved when lying down, and worsens when sitting or standing upright. It is the opposite of orthopnea. The condition was first described in 1949 and named in 1969. A related condition, orthodeoxia, describes the clinical finding of low oxygen saturation in the upright position, which improves when lying down. Platypnea and orthodeoxia (low oxygen levels when in upright posture) can co-exist, and this combination is named platypnea-orthodeoxia syndrome. The syndrome is considered extremely rare however. Causes Platypnea is usually due to either hepatopulmonary syndrome or an anatomical cardiovascular defect increasing positional right-to-left shunting (bloodflow from the right to the left part of the circulatory system) such as a patent foramen ovale. These defects include rare syndromes in which the venous blood from the liver does not pass through the lungs sufficiently, or if venous blood from the portal ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orthopnea
Orthopnea or orthopnoea is shortness of breath (dyspnea) that occurs when lying flat, causing the person to have to sleep propped up in bed or sitting in a chair. It is commonly seen as a late manifestation of heart failure, resulting from fluid redistribution into the central circulation, causing an increase in pulmonary capillary pressure and causing difficulty in breathing. It is also seen in cases of abdominal obesity or pulmonary disease. Orthopnea is the opposite of platypnea, shortness of breath that worsens when sitting or standing upright. Causes Orthopnea is often a symptom of left ventricular heart failure and/or cardiogenic pulmonary edema. It can also occur in those with asthma and chronic bronchitis, as well as those with sleep apnea or panic disorder. It is also as associated with polycystic liver disease. From a neuromuscular perspective, orthopnea is potentially a sign of severe diaphragmatic weakness. Under such circumstances, patients may describe shortness ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kussmaul Breathing
Kussmaul breathing is a deep and labored breathing pattern often associated with severe metabolic acidosis, particularly diabetic ketoacidosis (DKA) but also kidney failure. It is a form of hyperventilation, which is any breathing pattern that reduces carbon dioxide in the blood due to increased rate or depth of respiration. In metabolic acidosis, breathing is first rapid and shallow but as acidosis worsens, breathing gradually becomes deep, labored and gasping. It is this latter type of breathing pattern that is referred to as Kussmaul breathing. Terminology Adolf Kussmaul referred to breathing when metabolic acidosis was sufficiently severe for the respiratory rate to be normal or reduced. This definition is also followed by several other sources, including for instance Merriam-Webster, which defines Kussmaul breathing as "abnormally slow deep respiration characteristic of air hunger and occurring especially in acidotic states". Other sources, however, use the term Kussmau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypopnea
Hypopnea is overly shallow breathing or an abnormally low respiratory rate. Hypopnea is typically defined by a decreased amount of air movement into the lungs and can cause hypoxemia (low levels of oxygen in the blood.) It commonly is due to partial obstruction of the upper airway, but can also have neurological origins in central sleep apnea. (Or if a person has sleep apnea caused by both causes, it is variously referred to by a number of names, such as mixed sleep apnea or complex sleep apnea.) Hypopnea is traditionally considered to be less severe than apnea (the complete cessation of breathing), while other researchers have discovered hypopnea to have a "similar if not indistinguishable impact" on the negative outcomes of sleep breathing disorders. In sleep clinics, obstructive sleep apnea syndrome or obstructive sleep apnea–hypopnea syndrome (as well as central sleep apnea) is normally diagnosed based on the frequent presence of apneas and/or hypopneas rather than diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyperpnea
Hyperpnea, or hyperpnoea (forced respiration), is increased volume of air taken during breathing. It can occur with or without an increase in respiration rate. It is characterized by deep breathing. It may be physiologic—as when required by oxygen to meet metabolic demand of body tissues (for example, during or after heavy exercise, or when the body lacks oxygen at high altitude or as a result of anemia, or any other condition requiring more respiration)—or it may be pathologic, as when sepsis is severe or during pulmonary edema. Hyperpnea is further characterized by the required use of muscle contraction during both inspiration and expiration. Thus, hyperpnea is intense active breathing as opposed to the passive process of normal expiration. Hyperpnea is distinguished from tachypnea, which is a respiratory rate greater than normal, resulting in rapid and shallow breaths, but not necessarily increasing volume in breathing. Hyperpnea is also distinguished from hyperventilati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dyspnea
Shortness of breath (SOB), known as dyspnea (in AmE) or dyspnoea (in BrE), is an uncomfortable feeling of not being able to breathe well enough. The American Thoracic Society defines it as "a subjective experience of breathing discomfort that consists of qualitatively distinct sensations that vary in intensity", and recommends evaluating dyspnea by assessing the intensity of its distinct sensations, the degree of distress and discomfort involved, and its burden or impact on the patient's activities of daily living. Distinct sensations include effort/work to breathe, chest tightness or pain, and "air hunger" (the feeling of not enough oxygen). The tripod position is often assumed to be a sign. Dyspnea is a normal symptom of heavy physical exertion but becomes pathological if it occurs in unexpected situations, when resting or during light exertion. In 85% of cases it is due to asthma, pneumonia, reflux/LPR, cardiac ischemia, COVID-19, interstitial lung disease, congestive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bradypnea
Bradypnea is abnormally slow breathing. The respiratory rate at which bradypnea is diagnosed depends on the age of the person, with the limit being higher during childhood. Signs and symptoms Symptoms of bradypnea may include: *Dizziness *Near-fainting (drowsiness) or fainting *Fatigue *Weakness *Chest pains *Shortness of breath *Memory impairment or confusion *Tiring easily during any physical activity *Shortage of breath Causes *Degeneration of heart tissue because of aging *Damage to tissues in the heart from heart attack, heart disease or injury *High blood pressure or hypertension *Congenital heart defect which is a permanent disorder present at birth *Heart tissue infection also known as myocarditis -Complication of heart surgery *Hypothyroidism or an underactive thyroid glandWilliams, Mark."The Basic Geriatric Respiratory Examination."Medscape. 25 Nov 2009. *Imbalance of electrolytes which are mineral related substances needed for conducting electrical impulses *Obst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biot's Respiration
Ataxic respirations, also known as Biot's respirations or Biot's breathing, is an abnormal pattern of breathing characterized by variable tidal volume, random apneas, and no regularity. It is named for Camille Biot, who characterized it in 1876. Biot MC. Contribution a l'étude du phénomène respiratoire de Cheyne-Stokes. Lyon Med. 1876;23:517-528, 561-567. Biot's respiration is caused by damage to the medulla oblongata and pons due to trauma, stroke, opioid use, and increased intracranial pressure due to uncal or tentorial herniation. Often this condition is also associated with meningitis. In common medical practice, Biot's respiration is often mistaken for Cheyne–Stokes respiration, part of which may have been caused by them both being described by the same person and subtle differences between the types of breathing. Ataxic respirations were discovered by Dr. Camille Biot in the late 19th century as he wrote multiple papers analyzing subtle differences in Cheyne-Stokes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apnea
Apnea (also spelled apnoea in British English) is the temporary cessation of breathing. During apnea, there is no movement of the muscles of inhalation, and the volume of the lungs initially remains unchanged. Depending on how blocked the airways are ( patency), there may or may not be a flow of gas between the lungs and the environment. If there is sufficient flow, gas exchange within the lungs and cellular respiration would not be severely affected. Voluntarily doing this is called holding one's breath. Apnea may first be diagnosed in childhood, and it is recommended to consult an ENT specialist, allergist or sleep physician to discuss symptoms when noticed; malformation and/or malfunctioning of the upper airways may be observed by an orthodontist. Cause Apnea can be involuntary—for example, drug-induced (such as by opiate toxicity), mechanically / physiologically induced (for example, by strangulation or choking), or a consequence of neurological disease or tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
