Meclofenamate enhances blood oxygenation in acute oleic acid lung injury.

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Title:	Meclofenamate enhances blood oxygenation in acute oleic acid lung injury.
Author:	Schulman, L L : Lennon, P F : Ratner, S J : Enson, Y
Citation:	J-Appl-Physiol. 1988 Feb; 64(2): 710-8
Abstract:	To assess the role of vasoactive prostanoids in acute lung injury, we studied 16 dogs after intravenous injection of oleic acid (OA; 0.08 ml/kg). Animals were ventilated with 100% O2 and zero end-expiratory pressure. Base-line hemodynamic and blood gas observations were obtained 90-120 min following OA. Observations were repeated 30 min after infusion of meclofenamate (2 mg/kg; n = 10), or after saline (n = 6). Resistance to pulmonary blood flow was assessed using the difference between pulmonary arterial diastolic and left atrial pressures (PDG). Ventilation-perfusion (VA/Q) distributions were derived with the multiple inert gas technique. Prior to infusion, there were no significant differences between the two groups. PDG was elevated mildly above normal levels, and shunt flow was the principal gas exchange disturbance. Saline induced no significant changes in hemodynamics or gas exchange. Meclofenamate enhanced PDG to a small, significant degree and effected a 32% reduction in shunt flow (P less than 0.01). Perfusion was redistributed to normal VA/Q units with little change in low VA/Q perfusion or in overall flow. Arterial PO2 rose from 75 +/- 36 to 184 +/- 143 Torr (P less than 0.05). At autopsy, there were no significant differences in wet to dry lung weights. Prostaglandin inhibition redistributes perfusion from shunt to normal VA/Q units, thereby improving arterial PO2, without altering lung water acutely.
Review References:	None
Notes:	Copyright American Physiological Society. Abstracts are reprinted by the permission of the publisher of the journal for volume, pages, and dates cited. Hypertext links to electronic journal sites, if available, can be found in the the Peer Reviewed Journal List on the IBIDS home page.
Language:	English
Publication Type:	Journal-Article
Keywords:	Anthranilic Acids pharmacology : Lung physiopathology : Meclofenamic Acid pharmacology : Oleic Acids pharmacology : Oxygen blood : Respiration drug effects
URL:	http://www.jap.org