Oxygen equivalent. Oxygen equivalent compares the relative amount of oxygen available for respiration at a variable pressure to that available at SATP. As external respiration depends on the exchange of gases due to partial pressures across a semipermeable membrane and normally occurs at SATP, an oxygen equivalent may aid in recognizing and managing variable oxygen availabiity during procedures such as hyperbaric oxygen therapy or medical air transport.
It does so by expressing oxygen concentration as a ratio of the partial pressure of oxygen at a given altitude or pressure to Standard Atmospheric Pressure; rather than as a ratio of the PO2 at a given pressure to the total pressure of the gas mixture. The latter would generally be 0.2095, the atmospheric concentration by volume of O2, although FO2 and Patm vary for extraterrestrials. Calculations occur as follows: O2E = FO2(Pb + dP)/ Patm It is worthwhile to note that pressures may often be expressed in units of distance such as feet when diving. Pulmonology. Pulmonology is a medical specialty that deals with diseases involving the respiratory tract. The term is derived from the Latin word pulmō, pulmonis ("lung") and the Greek -λογία, -logia. Pulmonology is synonymous with pneumology (from the Greek πνεύμων ("lung") and -λογία, -logia), respirology and respiratory medicine.
Pulmonology is known as chest medicine and respiratory medicine in some countries and areas. Pulmonology is considered a branch of internal medicine, and is related to intensive care medicine. Pulmonology often involves managing patients who need life support and mechanical ventilation. Variations in nomenclature In the United Kingdom, Ireland, South Africa[dubious ], and Australia the term "respiratory physician" is used (rather than pulmonologist) to distinguish a physician that practices pulmonology. Diagnosis The pulmonologist begins the diagnostic process with a general review focusing on: Procedures Surgical procedures References
Exsufflation. Exsufflation is a strongly forced expiration of air. In medicine, airway secretions can be cleared with manual and mechanical exsufflation. Mechanical insufflation-exsufflation devices (also known as In-Exsufflator, Cofflator, and cough machine) alternate positive and negative airway pressure to stimulate cough. It is typically used in patients with neuromuscular disorders and sleep apnea. After certain surgical procedures, the gases (such as carbon dioxide) used to expand body cavities are mechanically or manually exsufflated.
The term is also used of certain rituals in the Christian religion involving the blowing of air to remove evil spirits; these survive in Eastern Christianity, but between the sixteenth and twentieth centuries were progressively abandoned in the West. For details see Insufflation. Müller's maneuver. Müller's Manoeuvre After a forced expiration, an attempt at inspiration is made with closed mouth and nose, whereby the negative pressure in the chest and lungs is made very subatmospheric; the reverse of Valsalva manoeuvre. This technique is designed to look for collapsed sections of airways such as the trachea and upper airways. In this maneuver, the patient attempts to inhale with his mouth closed and his nostrils plugged, which leads to a collapse of the airway.
Introducing a flexible fiberoptic scope into the hypopharynx to obtain a view, the examiner may witness the collapse and identify weakened sections of the airway. Müller's maneuver is used to help determine the cause of sleep apnea. A positive test result means the site of upper airway obstruction is likely below the level of the soft palate, and the patient will probably not benefit from a uvulopalatopharyngoplasty alone. Textbook of Medical Physiology p784 - Arthur C.
Breathing set. A breathing set may refer to: Timeline of respiratory therapy. From Wikipedia, the free encyclopedia Ancient period 1550 BC: (EG) The Ebers Papyrus describes ancient Egyptian inhalation treatments for asthma. Eighteenth Century (1700s) 1771: (US) Carl Scheele (1742–1786) makes "fire air" (oxygen) by heating magnesium oxide. His findings are published in June 1774.1774: (US) Joseph Priestley (1733–1804), credited with the discovery of oxygen, publishes his work on "dephlogisticated air" oxygen 3 months after a report by Carl Scheele. Nineteenth Century (1800s) 1816: (US) Rene T.H. Twentieth Century (1900s) 1900-1920 1908: (US) George Poe demonstrated his mechanical respirator by asphyxiating dogs and seemingly bringing them back to life.1918: Oxygen masks are used to treat combat-induced pulmonary edema. 1920-1940 1928: Phillip Drinker develops the "iron lung" negative pressure ventilator.1935: Carl Matthes invented the first noninvasive oximeter employing an ear probe. 1940-1960 1960-1980 1980-2000
Respiratory examination. Respiratory examination In medicine, the respiratory examination is performed as part of a physical examination, or when a patient presents with a respiratory problem (dyspnea (shortness of breath), cough, chest pain) or a history that suggests a pathology of the lungs. It is very rarely performed in its entirety or in isolation, most commonly it's merged with the cardiac examination. Positioning and Environment In the respiratory examination, the patient is asked to sit upright on an examination table, with arms at the side.
Adequate lighting is ensured, and the patient is asked to expose the chest. Later in the examination, when the back is examined, the patient is usually asked to move the arms forward so that the scapulae are not in the way of examining the upper lung fields. The respiratory exam has conventionally been split into different stages: One method to remember the steps of the examination is through the mnemonic PIPPA: Inspection Palpation
Liquid breathing. Perfluorochemical (perfluorocarbon) molecules have very different structures that impart different physical properties such as respiratory gas solubility, density, viscosity, vapor pressure, and lipid solubility. Thus, it is critical to select the appropriate PFC for a specific biomedical application, such as liquid ventilation, drug delivery or blood substitutes. The physical properties of PFC liquids vary substantially; however, the one common property is their high solubility for respiratory gases. In fact, these liquids carry more oxygen and carbon dioxide than blood. In theory, liquid breathing could assist in the treatment of patients with severe pulmonary or cardiac trauma, especially in pediatric cases. Liquid breathing has also been proposed for use in deep diving and space travel. Despite some recent advances in liquid ventilation, a standard mode of application has not been established yet.
Approaches Total liquid ventilation PFC vapor
Physiology of respiratory. Bronchoscopy. Bronchoscopy is an endoscopic technique of visualizing the inside of the airways for diagnostic and therapeutic purposes. An instrument (bronchoscope) is inserted into the airways, usually through the nose or mouth, or occasionally through a tracheostomy. This allows the practitioner to examine the patient's airways for abnormalities such as foreign bodies, bleeding, tumors, or inflammation. Specimens may be taken from inside the lungs. The construction of bronchoscopes ranges from rigid metal tubes with attached lighting devices to flexible optical fiber instruments with realtime video equipment.
History A German, Gustav Killian, performed the first bronchoscopy in 1897. Killian used rigid bronchoscope to remove a pork bone. An American, Chevalier Jackson, refined the rigid bronchoscope in the 1920s, using this rigid tube to visually inspect the trachea and mainstem bronchi. A Japanese, Shigeto Ikeda, invented the flexible bronchoscope in 1966.
Types Rigid Purposes Carbon dioxide scrubber. A carbon dioxide scrubber is a device which absorbs carbon dioxide (CO2). It is used to treat exhaust gases from industrial plants or from exhaled air in life support systems such as rebreathers or in spacecraft, submersible craft or airtight chambers. Carbon dioxide scrubbers are also used in controlled atmosphere (CA) storage. Technologies Amine scrubbing The dominant application for CO2 scrubbing is for removal of CO2 from the exhaust of coal- and gas-fired power plants. Virtually the only technology being seriously evaluated involves the use of various amines, e.g. monoethanolamine. As of 2009[update], this technology has only been lightly implemented because of capital costs of installing the facility and the operating costs of utilizing it. Minerals and zeolites Several minerals and mineral-like materials reversibly bind CO2. Most often, these minerals are oxides, and often the CO2 is bound as carbonate.
Sodium hydroxide ΔH° = -5.3 kJ/mol ΔH° = -64.5 kJ/mol. Respiratory Care Week. Respiratory Care Week is a week set to honor and recognize respiratory therapists. Respiratory Care Week is celebrated internationally but most notably in Canada and the United States. Respiratory Care Week is usually the last full week of October. United States President Ronald Reagan proclaimed the first week dedicated to honoring respiratory therapists in 1982. Originally November 7 through November 13, 1982 Previous dates 1982: November 7 — November 131983: September 15 — October 12011: October 23 — October 29 last full week of October (Sunday through Saturday) See also International Nurses Day References Valsalva maneuver. The Valsalva maneuver or Valsalva manoeuvre is performed by moderately forceful attempted exhalation against a closed airway, usually done by closing one's mouth, pinching one's nose shut while pressing out as if blowing up a balloon.
Variations of the maneuver can be used either in medical examination as a test of cardiac function and autonomic nervous control of the heart, or to "clear" the ears and sinuses (that is, to equalize pressure between them) when ambient pressure changes, as in diving, hyperbaric oxygen therapy, or air travel. The technique is named after Antonio Maria Valsalva, a 17th-century physician and anatomist from Bologna whose principal scientific interest was the human ear. He described the Eustachian tube and the maneuver to test its patency (openness). He also described the use of this maneuver to expel pus from the middle ear. A modified version is done by expiring against a closed glottis. Physiological response Normalizing middle-ear pressures Pulmonology. High-altitude pulmonary edema. High-altitude pulmonary edema (HAPE) (HAPO spelled oedema in British English) is a life-threatening form of non-cardiogenic pulmonary edema (fluid accumulation in the lungs) that occurs in otherwise healthy mountaineers at altitudes typically above 2,500 meters (8,200 ft). Some cases, however, have been reported also at lower altitudes (between 1,500–2,500 metres or 4,900–8,200 feet in highly vulnerable subjects), although what makes some people susceptible to HAPE is not currently known.
HAPE remains the major cause of death related to high-altitude exposure, with a high mortality rate in the absence of adequate emergency treatment. Symptoms Physiological and symptomatic changes often vary according to the altitude involved. The Lake Louise Consensus Definition for High-Altitude Pulmonary Edema has set widely used criteria for defining HAPE symptoms: Symptoms: at least two of: Signs: at least two of: Incidence Predisposing factors Research See also