Figure 2From: Alveolar instability caused by mechanical ventilation initially damages the nondependent normal lungAlveolar sampling technique. The microscope objective was moved to the top of the coverslip and the first field was filmed (F1). The objective was than moved down one field, viewing all new alveoli. This was sequentially repeated to the bottom of the coverslip, filming five entirely different microscopic fields of alveoli.Back to article page