National Women's Annual Clinical Report 2010

9.4.4 IVH (Benchmarked with ANZNN) (see tables in appendix)
50%
40%
30%
20%
10%
ANZNN NW
0%
1995 1998 2001 2004 2007 2010
25%
20%
15%
10%
5%
ANZNN NW
0%
1995 1998 2001 2004 2007 2010
Figure 89: Any IVH at 24-27 weeks Figure 91: Any IVH at 28-31 weeks
20%
15%
10%
5%
ANZNN NW
0%
1995 1998 2001 2004 2007 2010
6%
4%
2%
0%
ANZNN NW
1995 1998 2001 2004 2007 2010
Figure 90: Severe (G3-4) IVH at 24-27 weeks Figure 92: Severe (G3-4) IVH at 28-31 weeks
The increase in severe IVH at 24-27 weeks in 2009 represented an increase from 4 to 13
cases but for 2010 the number decreased to a more typical 7 cases (12%). Severe IVH at
28-31 weeks was only 3 cases, including one retrieval baby, which was equal to 2009.
However, the apparent minor increase is due to a small decrease in the denominator. Note
that in 2005 there was a change in policy with routine imaging no longer being performed for
clinically stable babies greater than 30 weeks gestation. Previously results were reported for
28-31 weeks to be consistent with ANZNN and pre 2005 data. However, for 2010 to avoid
major changes in the denominator we have interpreted those infants in whom an ultrasound
was not performed, due to the policy change, as negative (no IVH). Thus figure 91&92 is
represented differently to the previous years. This rationale is supported by previous data on
IVH for this age group and the fact that clinically unstable infants still have an ultrasound
performed.
9.4.5 Assisted ventilation (all admissions)
9.4.6 Use and duration of assisted ventilation
Data in this section are presented for all inborn babies at ACH, thus excluding babies
transferred to NICU in the postnatal period. This allows more meaningful comparisons of
postnatal care at ACH over time. Note that although the total number of admissions has
plateaued, the total number of babies receiving IPPV has increased dramatically from 132 to
134