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Figure 89. Schematic diagram showing the apparatus set up for performing the Raised Volume
manoeuvres
5.6.1.2 To start raised volume RTC data recording
 Maintain continuous monitoring of the infant’s vital signs
 Select “Raised Volume Squeeze” in the LabMan main program page (Figure 18)
 Click on [F6] (“Change reservoir pressure”) to set the optimal reservoir pressure (P r) as
determined during the preceding tidal RTC manoeuvres. If the required Pr is > 5 kPa, click on
the [Advance] button to allow appropriate Pr setting
 Gently and carefully remove the balloon shutter from the PNT/mask unit (which is already
applied to the infant)
 Turn on the medical air supply at a flow of ~812 L/min to the NeopuffTM Infant the
Resuscitator system. Prior to connecting the Neopuff T-piece/connector to the PNT/mask
(already in place over the infant’s airway opening) (Figure 90), it is vital to check that the PIP
is set appropriately at 30 cmH2O (2.94 kPa): this can be done by closing off one end of the
Neopuff T-piece and intermittently occluding the “PEEP” end to read off the PIP setting from
the Neopuff system (Figure 15). Prior to commencing RV manoeuvres, the medical air flow
needs to be titrated and checks made at each test session to ensure that, in accordance to
consensus (section 7.4.4), lung volume is augmented using PIP of 30 cmH2O
Note: The larger the expected FVC, the higher the medical air flow should be set such that the
infant is not being inflated too slowly (as he/she may start to actively breathe in before full
inflation) or too rapidly (difficult to trigger the squeeze on time). However, if medical air
flow is set >10 L/min, care must be taken to check that PIP does not exceed 30 cmH2O.
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