gas exchange

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Related to Pulmonary gas exchange: Gaseous exchange

exchange

 [eks-chānj´]
1. the substitution of one thing for another.
2. to substitute one thing for another.
gas exchange the passage of oxygen and carbon dioxide in opposite directions across the alveolocapillary membrane.
health care information exchange in the nursing interventions classification, a nursing intervention defined as providing patient care information to health professionals in other agencies.
impaired gas exchange a nursing diagnosis approved by the North American Nursing Diagnosis Association, defined as excess or deficit in oxygenation and/or carbon dioxide elimination at the alveolocapillary membrane (see gas exchange). Etiological and contributing factors include an altered oxygen supply, changes in the alveolar-capillary membrane, altered blood flow, and altered oxygen-carrying capacity of the blood. Defining characteristics include changes in mental status such as confusion, somnolence, restlessness, and irritability; ineffective coughing and inability to move secretions from the air passages; hypercapnia; and hypoxia. For specific medical treatments and nursing interventions, see airway clearance, ineffective; breathing patterns, ineffective; chronic airflow limitation; and anemia.
plasma exchange see plasma exchange.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

gas exchange

or

gas carriage

the transfer of gases between an organism and the environment. In RESPIRATION, oxygen is taken in and carbon dioxide given out. Photosynthesis in plants complicates this system in that during the process carbon dioxide is required by the plant and oxygen given off (see COMPENSATION PERIOD). In plants and small animals such as PROTOZOANS and PLATYHELMINTHS, gas exchange occurs by DIFFUSION. In higher animals, special respiratory surfaces have been developed, for example, internal and external gills, lungs and trachea.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Gas exchange

The process by which oxygen is extracted from inhaled air into the bloodstream, and, at the same time, carbon dioxide is eliminated from the blood and exhaled.
Mentioned in: Respiratory Failure
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Rees, "Minimal model quantification of pulmonary gas exchange in intensive care patients," Medical Engineering & Physics, vol.
Bai et al., "Pulmonary gas exchange impairment following tourniquet deflation: a prospective, single-blind clinical trial," Orthopedics, vol.
Interpreting ABG results: assessing pulmonary gas exchange
(2003) Muscle oxygenation and pulmonary gas exchange kinetics during cycling exercise ontransitions in humans.
Hiba Ayub, head of tobacco control at the CCO at KHCC presented the most recent study conducted by CCO under the title of"The acute effects of water-pipe smoking on pulmonary gas exchange and exercise capacity in healthy subjects".
The PFC liquids used to support pulmonary gas exchange are a type of synthetic liquid fluorinated hydrocarbon (hydrocarbons with the hydrogen replaced by fluorine, and for perflubron where a bromine atom is added as well) with high solubility for oxygen and carbon dioxide.
Lung aeration and pulmonary gas exchange during lumbar epidural anaesthesia and in the lithotomy position in elderly patients.
Effect of age on pulmonary gas exchange during laparoscopy in the Trendelenburg lithotomy position.
An automated pulmonary gas exchange system was used to assess breath by breath cardio-respiratory function.
Pulmonary gas exchange during apnoea in exercising men.

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