Inspiratory NO Concentration Fluctuation During Inhalational NO Administration

  • M. Sydow
  • J. Zinserling
  • S. J. Allen
Conference paper
Part of the Yearbook of Intensive Care and Emergency Medicine book series (YEARBOOK, volume 1998)


In the presence of pulmonary hypertension inhalation of nitric oxide (NO) in low concentrations produces selective pulmonary vasodilation without an effect on the systemic vasculature [1]. Inhaled NO is delivered predominantly to well ventilated lung areas. Thus, in lung diseases with severe mismatching of ventilation and perfusion (e.g., acute lung injury) pulmonary vasodilation occurs selectively in ventilated alveoli. This is in contrast to other vasodilators such as intravenous prostacyclin or nitroglycerin. Inhaled NO causes a redistribution of the pulmonary blood flow from non- or poorly ventilated areas to ventilated areas of the lung, and consequently improves oxygenation by a reduction of the intrapulmonary right-to-left shunt [2]. The selectivity of NO’s effects are mainly caused by its short action of only a few seconds. NO binds quickly to hemoglobin which is then rapidly converted via nitrosyl Fe(II)-hemoglobin to methemoglobin. Owing to its attractive properties inhalational NO has been proposed as a therapeutic agent in many cardiopulmonary diseases. However, due to its potential chemical reactivity and toxicity the delivery of inhaled NO requires special equipment and techniques.


Nitric Oxide Minute Ventilation Adult Respiratory Distress Syndrome Inspiratory Flow Concentration Fluctuation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • M. Sydow
  • J. Zinserling
  • S. J. Allen

There are no affiliations available

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