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Balloon sizing of pulmonary branch stenosis: a useful method to guide stent implantation
1Mattel Children s Hospital at UCLA, 108333 Le Conte Avenue, B2-427 MDCC, Los Angeles, CA, 90095-1743, USA.
Insights
Calibrated angiography may underestimate pulmonary branch stenosis size in congenital heart disease patients. A compliant sizing balloon catheter provided more accurate vessel dimensions, leading to optimal stent selection for improved outcomes.
Area of Science:
- Cardiology
- Interventional Radiology
Background:
- Pulmonary branch stenosis is common in congenital heart disease.
- Stent implantation is a frequent treatment for this condition.
- Accurate vessel sizing is crucial for successful stent implantation.
Purpose of the Study:
- To compare vessel dimensions measured by standard calibrated angiography versus a compliant sizing balloon catheter.
- To evaluate the impact of sizing method on angioplasty balloon and stent selection.
Main Methods:
- Selective calibrated angiography was performed in 9 patients with 11 pulmonary branch stenoses.
- Measurements were repeated using inflated Amplatzer sizing balloon catheters.
- Statistical analysis compared diameters obtained from both methods.
Main Results:
- Vessel diameters (minimum, maximum proximal, maximum distal) were significantly larger (p < 0.01) with the sizing balloon method.
- Sizing balloon measurements led to the selection of larger angioplasty balloons and stents.
- In 7 of 8 stented lesions, larger balloons were chosen than with standard angiography.
Conclusions:
- Standard calibrated angiography may underestimate pulmonary branch vessel diameters.
- Compliant sizing balloons offer a more accurate method for guiding stent implantation in pulmonary branch stenosis.
- This method may improve stent selection and treatment outcomes.
Unlabelled:
Among patients with congenital heart disease, pulmonary branch stenosis is a common indication for stent implantation. Selective calibrated angiography is the standard method of vessel sizing to guide angioplasty balloon and stent selection. Our aim was to compare vessel dimensions from standard calibrated selective angiography with those obtained using a compliant sizing balloon catheter.
Methods:
9 patients with 11 pulmonary branch stenoses underwent selective calibrated angiography. Amplatzer sizing balloon catheters positioned across the stenoses were inflated with dilute contrast agent. Digital angiograms were repeated in the same projections. Measurements from both methods were analyzed statistically. Minimum, maximum proximal and maximum distal vessel diameters were all significantly larger (p < 0.01) when measured by the sizing balloon method. Angioplasty balloons and stent diameters were chosen according to the sizing balloon measurements. In 7 of 8 stented lesions, larger angioplasty balloon diameters were selected for stent implantation than would have been chosen by standard angiography. Calibrated selective angiography may undersize vessel diameters. Use of a compliant sizing balloon appears to offer an accurate method to guide stent implantation in pulmonary branch stenosis.