Table 3. Average tidal volume delivered (ml) for each BVM tested, at the start of the extended day trial, and after the completion of seven days of continuous use.

	Ambu PEEP 5 (ml)	Ambu (ml)	Laerdal LSR Silicone (ml)	Laerdal PVC (ml)	Rüsch (ml)
Day 0	322 +/- 1	327 +/- 2	332 +/- 2	395 +/- 0.5	323 +/- 1
Day 7	325 +/- 1	328 +/- 2	323 +/- 1	391 +/- 0.5	320 +/- 1
Day 30					300 +/- 0.4
Day 45					304 +/- 0.4
Percent difference	0.5	0.2	1.4	0.5	3.7