A prosthesis for banding the main pulmonary artery, capable of serial dilatation by balloon angioplasty.
A prosthesis constructed with a fatigued steel helix encased in a silicone rubber shield was used to band the main pulmonary artery in 10 dogs. After a mean duration of 138 days the banded site was dilated with a 20 mm diameter angioplasty catheter. This dilatation produced a mean increase of 44.3% in the cross-sectional area. A further mean increase of 2.2% in the cross-sectional area was measured 137 days after the dilatation. In five uncomplicated experiments a second dilatation was performed with a 23 mm diameter angioplasty catheter after a mean interval of 140 days. The second dilatation produced a further 21% increase in the cross-sectional area. In the five experiments in which two dilatations were performed, there was a total increase in the mean cross-sectional area of 94% produced 273 days after banding. This prosthesis maintains banding of the main pulmonary artery and can be serially dilated by balloon angioplasty.
Vince
D J
DJ
University of British Columbia, British Columbia Children's Hospital, Vancouver, Canada.
Culham
J A
JA
D000800:Angioplasty, Balloon; D000818:Animals; D001807:Blood Vessel Prosthesis; D004285:Dogs; D006330:Heart Defects, Congenital / Q000601:surgery; D008026:Ligation / Q000379:methods; D010166:Palliative Care; D011651:Pulmonary Artery / Q000473:pathology / Q000601:surgery*