Page 17 - ANZCP Gazette AUG 2023

Bubblers
VPCML
RX05, FX05
Mortality.
If divided into two periods based on the previous studies and the previously unreported data there is no statistically significant difference (p=0.19) between the groups overall. Not all early or late deaths were cardiac related.
• 1980-2005 n= 659
• 8 early deaths, 9 late deaths. • 2006-2021 n= 481
• 3 early deaths, 4 late deaths. Reintervention.
The drop in reintervention rate post 2010 is probably more of a reflection of the lack of accurate follow-up data in the pre 2010 patients making the intervention rate lower than it actually is.
Prime Constituents.
There has been a marked decrease in donor blood volume due to the changes outlined previously but also because of the switch to packed red blood cells for priming in 2006 as whole blood became unavailable.
Bubblers VPCML RX05, FX05
Bypass and Cross Clamp Time.
This is interesting in that the year to year variations are mainly due to surgeons. Some are faster than others. I confirmed this by analysis of the times of individual surgeons and the years they were operating. All surgeons operated across the ranges of patient ages and sizes. DHCA did not appear to have much effect on these times.
Length of Stay
Length of Stay has increased slightly. Data was only available for admissions post 1993. Even so, the change in length of stay is unexpected.
Freedom from reintervention sees the greatest drop in the first year post primary repair and then is relatively consistent through to 15 years post repair. The flattening after this reflects the loss of follow-up as patients are moved on to adult services on reaching 18 years of age.
How Long Until Reintervention Based On Year Of Primary Repair?
This is interesting as the start of reintervention in the first year post repair is so late in the study period. Reintervention from one to five years post repair is reasonably consistent as are the other groups. The pattern of >25 years and 15-25 years might indicate that as time progresses patients without reintervention will fall into these groups. Follow-op for this data is current but still missing some data. There were no documented reinterventions for patients treated in 1985. Only one reintervention per patient has been counted, some have had more than one reintervention.
SEPTEMBER 2023 3SCTS SPECIAL EDITION | www.anzcp.org 15