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Carbachol increases lung fluid reabsorption as determined by a fluorometric determination of lung fluid (5). This figure shows lung fluid clearance following saline challenge in mice receiving an intraperitoneal (IP) injection of 100, 250, or 500 nM carbachol or 500 nM atropine plus 500 nM carbachol. Control group represents mice receiving only a tracheal instillation of saline (values are means ± SD, n = 4 per group).
