FIGURE 1.

The ventilator was tested on a lung simulator. All parameters were tested to their stated limits (over 200 individual experiments) and according to International Standards Organization standards for pressure‐controlled ventilation. Notice that the dead space is kept to a minimum by reducing the length of tube between the bag and the lung simulator; this configuration was reproducible with a full‐sized simulator manikin and a standard adjustable overbed hospital bedside table. The system shown here is an early prototype with exposed electronics, but is to be supplied with housings as depicted in Figure 2