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Chest, Vol 88, 327-334, Copyright © 1985 by American College of Chest Physicians

ARTICLES

Small solute clearance from the lungs of patients with cardiogenic and noncardiogenic pulmonary edema

GR Mason, RM Effros, JM Uszler and I Mena

The regional clearance of 99mTc-diethylenetriamine penta-acetate (99mTc- DTPA) from the lungs was measured in 14 patients with noncardiogenic pulmonary edema, six patients with acute pulmonary edema secondary to heart failure, and 29 normal subjects. The radionuclide was delivered in an aerosol which was inhaled for 120 seconds, and the subsequent decline of radioactivity from the lungs was monitored for seven minutes over each of six peripheral regions of interest with a computerized scintillation camera. The average 99mTc-DTPA clearance of these regions was accelerated above the 98 percent confidence limits in all but three of the patients with noncardiogenic edema. The mean clearance value in this group of patients was significantly greater than those in normal subjects or patients with cardiogenic pulmonary edema. Clearances returned toward normal in each of seven subjects who improved clinically. Only one of the patients with cardiogenic pulmonary edema had an elevated average clearance rate, and the mean clearance for this population was not statistically greater than normal. This procedure appears to detect increased epithelial permeability caused by lung injury and may help distinguish between cardiogenic and noncardiogenic pulmonary edema.


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Copyright © 1985 by the American College of Chest Physicians.