18
Red line
(maximum)
Blue line
(current volume of air)
(3) Adjust the volume of air in the amnion while observing the amnion indicator. The red line
on the amnion indicator is the maximum level for filling the amnion with air. The blue line
indicates the current volume of air. To add air, pump air into the amnion using the rubber
bladder. To remove air, twist the valve on the rubber bladder counter-clockwise to loosen it.
*Filling the amnion with a volume of air that exceeds the red line (maximum) on the amnion
indicator may cause the amnion to rupture. Be sure to maintain the air volume below the red
line (maximum).
[REFERENCE]
As the volume of air in the amnion becomes larger, the situation where palpation is more
difficult can be simulated. Using a smaller volume of air simulates the situation where
palpation is easier. Adjust to suit the situation.