Abscess . Localized collection of pus in a cavity formed by tissue degeneration.
Absorption. To soak up; as a sponge
Acapnia. Reduced carbon dioxide tension in the blood; results from increased pulmonary ventilation.
Acarbia. Reduced level of carbon dioxide in the blood with a proportional reduction in the alkaline bicarbon- ate.
Acid-base balance. The human body cannot survive if the bloodstream becomes either markedly acid or al- kaline; it must remain in a very narrow range of bal- ance between acidity and alkalinity. Normal range is a pH of 7.35 to 7.45, neutral is a pH of 7, so the body normally is slightly alkaline. pH means the in- verse of the log of the hydrogen ion concentration in the bloodstream.
Acidosis. A condition characterized by the presence of excessive quantities of acids in the blood; used mostly to indicate a decrease in the alkaline reserve below normal levels.
Acute. Sharp, severe, occurring suddenly.
Adhesive force. The clinging of the walls of the bron- chioles of a diseased lung that has sticky secretions as a result of the disease.
Adrenalin (epinephrine). Medication used as a vaso- constrictor and cardiac stimulant in acute circulatory failure; also used as a local vasoconstrictor to relieve hemorrhage and local congestion and to relax the bronchi in asthmatic paroxysms.
Aerosol. Liquid droplets suspended in a stream of gas
Air trapping. Abnormal condition in which air cannot be expelled from the alveoli during exhalation as a re- sult of collapse of bronchioles or blockage by tena- cious mucus
Airway. The path air travels from the atmosphere to and from the alveoli. In anesthesia or resuscitation, a mechanical device used to keep the passages of the upper respiratory tract open for the passage of air.
Alcohol. A colorless, flammable liquid made from the fermentation of carbohydrates by yeast, used primar- ily for disinfection. In respiratory therapy ethyl alco- hol is used to break up bubbles in pulmonary edema by lowering the surface tension of the bubbles
Alkalosis A condition in which the alkaline (hy- droxyl ion concentration) content in the blood in- creases above normal limits. A term used most often to indicate an increase in alkaline reserve above nor- mal levels.
Allergy. A hypersensitive state acquired through ex- posure to a particular allergen
Alveolar. Pertaining to the alveoli.
Alveoli. Air sacs located at the end of the respiratory tract that are microscopic in size. The total number of these sacs has been estimated at 300 million (singular: alveolus)
Ambient. Pressure equal to the atmosphere around an organism.
Amelioration. Improvement
Anaphylaxis. A rapid, exaggerated, allergic reaction.
Anemia. A condition in which blood is deficient in volume or quality of red blood cells.
Aneurysm. A weakness in the wall of the artery caus- ing a dilation in that area
Angina. A severe constricting pain; usually related to a heart condition
Anoxia. A term that literally means without oxygen. This term is used generally to indicate lack of oxygen
in the blood and tissues of the body.
Antibiotic. Inhibits the growth of microorganisms and fights infection.
Antiseptic. An agent that inhibits the growth of mi-
croorganisms
Antitussive. Cough stopping.
Aortic. Pertaining to the aorta
Apnea. Complete cessation of respiration from any
Cause
Apneic. Not breathing.
Apneusis. Abnormal respiration characterized by a prolonged inspiration.
Articular. Of, relating to, or affecting a joint
Arrested. As this pertains to disease, it means that the course of the disease has been stopped-that the dis- ease is staying in its present condition and not getting worse; the disease is not progressing.
Dysrythmia (also known as arythmia). Variation from the normal rhythm, especially of the heart
Arterial. Pertaining to the arteries
Articulate. To unite by joints; to join.
Aseptic. Sterile: free from septic or poisonous mate- rial
Asphyxia. A condition characterized by interference with oxygenation and carbon dioxide elimination;
usually associated with the environment.
Aspirate. Inhalation of any foreign matter, such as food, saliva, or stomach contents (as after vomiting), into the airway.
Asthma. A disease state characterized with difficult
respiration and wheezing on expiration. Wheezes are caused as exhaled air flows past narrowed air pas- sages caused by spasms of circular muscles around bronchi and bronchioles; usually complicated by se- cretions inside the airway that increase the difficulty in breathing and lead to infection.