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 :
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.
(x 10-6 cm/dyne, 100 Hz): 10.0/mN