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Updated: Jun 23, 2026
A Pulmonary Trunk Banding Model of Pressure Overload Induced Right Ventricular Hypertrophy and Failure
Published on: November 29, 2018
Modification of Trusler's formula for the pulmonary artery banding
1Division of Cardiothoracic Surgery, Department of Cardiovascular Diseases, King Faisal Specialist Hospital and Research Center, Jeddah 21499, Saudi Arabia. gbaslaim@hotmail.com
Background:
The major difficulty of pulmonary artery banding (PAB) is optimal intraoperative adjustment. In this study, a target intraoperative shunt ratio (Q(p)/Q(s)) was utilised to evaluate a fixed Trusler's formula for the degree of PAB of infants destined for either univentricular or biventricular surgical route.
Methods:
Ten consecutive infants (median age, 1.62 months) undergoing PAB through median sternotomy were studied. A fixed Trusler's formula (20mm+1mm/kg body weight) was used to set the initial band size, and subsequent intraoperative adjustment was based on target Q(p)/Q(s) (using oxymetric data). Suitable target Q(p)/Q(s) was set
Results:
In the biventricular group, the target mean Q(p)/Q(s) of 0.4 was achieved according to the fixed formula. However the band size was narrower in the univentricular group by 2.25 mm to achieve the target mean Q(p)/Q(s) of 0.27 instead of a higher level (2.2) with the fixed formula.
Conclusion:
Using the intraoperative Q(p)/Q(s) calculation, the circumference of the band was in agreement with the fixed formula of Trusler for the biventricular repair group, however a narrower band size is recommended for the univentricualr palliation group.
