GH: growth hormone; IGF-I: insulin-like growth factor I; ULNV: upper limit normal value; R0: intercept resistance; Rm: mean resistance; S: resistance curve angular coefficient; Fr: resonance frequency; Xm: mean reactance; Cdyn:
dynamic compliance of the respiratory system; Zrs4Hz: impedance module at 4 Hz.
In this investigation, focus is placed on the modelling of
dynamic compliance of fixture/workpiece interface.
As resistance is a measure of both static and
dynamic compliance, as well as the tube internal diameter, changes in resistance will be reflected in the mean airway pressure, peak inspiratory pressure and plateau pressures.
The
dynamic compliance coefficient, [C.sub.M], of the rocking vibration of a strip foundation can be expressed as follows [27]:
We had critically read the paper by Marcus et al (2002), who randomised 20 anaesthetised children under two years of age to receive either a timed recruitment manoeuvre (30 cm[H.sub.2]O for 10 seconds using 33% oxygen in nitrous oxide), or three minutes of 100% inspired oxygen at the same ventilatory parameters The group receiving 100% inspired oxygen experienced a 9% decrease in
dynamic compliance at three minutes, whilst the recruitment manoeuvre (33% oxygen) produced a 30% increase in
dynamic compliance at one minute after the procedure.
Dynamic compliance (x 10-6 cm/dyne, 100 Hz): 10.0/mN
