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Ann Thorac Surg 2001;72:1358-1361
© 2001 The Society of Thoracic Surgeons

Original article: cardiovascular

A new percutaneously adjustable, thoracoscopically implantable, pulmonary artery banding: an experimental study

Emmanuel Le Bret, MDa, Philipp Bonhoeffer, MDb, Thierry A. Folliguet, MDa, Daniel Sidi, MDb, François Laborde, MDa, Marc R. de Leval, MDc, Pascal Vouhé, MDb

a Institut Mutualiste Montsouris, Paris, France
b Hôpital Necker-Enfants Malades, Paris, France
c Great Ormond Street Hospital for Children NHS Trust, London, England, United Kingdom

Accepted for publication May 30, 2001.

Address reprint requests to Dr Le Bret, Departement Cardio-Vasculaire, L’Institut Mutualiste Montsouris, 42 Blvd Jourdan 75014 Paris, France
e-mail: emmanuel.lebret{at}imm.fr

Background. In patients who undergo left ventricular retraining, multiple reoperations are often necessary to adjust the pulmonary artery banding. The availability of a percutaneously adjustable band would be very useful.

Methods. Ten lambs (10 to 25 kg) underwent pulmonary artery banding using a new device, 7 by thoracotomy and 3 by thoracoscopy. The possibility of percutaneously adjusting the band was evaluated immediately after operation in 10 animals and at 3 months in 8 animals.

Results. One death occurred on the day of the procedure from displacement of the device and another death was from infection. Immediate hemodynamic studies proved the feasibility of increasing right ventricular afterload in a precise and reversible way. After 3 months the band could still be precisely loosened or tightened in all but 1 animal. Autopsy revealed that all the devices were in the correct position and no fibrosis or adhesions were present around the devices, and there was no residual stenosis noted on the pulmonary artery.

Conclusions. This new device may be a valuable alternative to the repeated pulmonary artery banding needed for ventricular preparation.




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