| Popis: |
WE have recently been puzzled by an apparent paradox. The Model 20 or 21 Kreiselman apparatus for resuscitation of the newborn infant, used for years in our delivery rooms, has been effective in initiating respiration in some depressed infants when the pressure relief indicator beside the water column was set to a limit of 10 mm. of mercury (13.6 cm. of water).1 , 2 On the other hand, studies with lungs excised from animals and infants suggest that higher pressures must be sustained a minute or more before air is observed to enter the lung.3 , 4 A pressure of 13.6 cm. of water . . . |
