The microscopic appearance of a sodium-potassium exchange resin in histologic sections

The histologic appearance of Kayexalate, an ion-exchange resin, in bronchioles and alveolar spaces is described. Aspiration of this material occurred as a terminal event in an infant who suffered neonatal asphyxia and meconium aspiration. A solution of Kayexalate prepared for comparison appears to be identical to that found in the lung sections.