impaired gas exchange


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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.

im·pair·ed gas ex·change

(im-pārd gas eks-chānj)
A nursing diagnosis for a patient suffering current or future problems with oxygen/carbon dioxide balance.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
In the present study, we demonstrated that limb ischemia-reperfusion can lead to (1) a systemic inflammatory response, represented by an increase of proinflammatory factors like IL-6 and CCL2, and (2) impaired gas exchange in the lungs, demonstrated by decreased Pa[O.sub.2], A-a[O.sub.2], and RI.
Inadequate respiratory drive and oxygen intake, impaired gas exchange, shunt physiology, reduced oxygen carrying capacity, inadequate pumping of the oxygen-rich blood, and poor oxygen exchange at peripheral tissues may all contribute to the sensation of dyspnea.
(1) Most patients demonstrate impaired gas exchange, as evidenced by low oxygen-haemoglobin saturation at rest or on exercise; hypoxaemia on arterial blood gas sampling; or impaired diffusing capacity (DLCO).

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