Blalock –Taussig Shunt Size: Should it be Based on Body Weight or Target Branch Pulmonary Artery Size?

In conclusion, instead of weight, considering the size of the target pulmonary artery and thereby, the S/PA ratio would be more instructive in determining shunt size. There were a high number of patients in our study who showed PAH having received a shunt size based on their body weig ht. By contrast, our results showed that the S/PA ratio of ≥ 0.9 would be a good predictor of in-hospital ST.
Source: Pediatric Cardiology - Category: Cardiology Source Type: research