Adaptable Pulmonary Artery Band for Late Arterial Switch Procedure in Transposition of the Great Arteries Nicole Sekarski, MD, Michel Hurni, MD, Ludwig.

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Adaptable Pulmonary Artery Band for Late Arterial Switch Procedure in Transposition of the Great Arteries Nicole Sekarski, MD, Michel Hurni, MD, Ludwig K. von Segesser, MD, Erik J. Meijboom, MD, Stefano Di Bernardo, MD The Annals of Thoracic Surgery Volume 94, Issue 4, Pages 1311-1316 (October 2012) DOI: 10.1016/j.athoracsur.2012.04.095 Copyright © 2012 The Society of Thoracic Surgeons Terms and Conditions

Fig 1 (A) FloWatch-PAB is an adaptable pulmonary artery band consisting of a micromotor able to move a piston covered by a silicone membrane up and down. The device is clipped around the pulmonary artery by a hinge piece. The image on the left shows the FloWatch completely opened with the piston in its original position; the image on the right shows the FloWatch closed by the movement of the piston upwards which squeezes the pulmonary artery. (B) External antenna is placed on the child's chest with its control unit. This allows signals to be sent to the micromotor, enabling it to move the piston in either direction. Data of each device are stored on a microchip memory card inserted in the control unit. The Annals of Thoracic Surgery 2012 94, 1311-1316DOI: (10.1016/j.athoracsur.2012.04.095) Copyright © 2012 The Society of Thoracic Surgeons Terms and Conditions

Fig 2 Kaplan-Meier freedom from reoperation between band placement and arterial switch operation. The Annals of Thoracic Surgery 2012 94, 1311-1316DOI: (10.1016/j.athoracsur.2012.04.095) Copyright © 2012 The Society of Thoracic Surgeons Terms and Conditions

Fig 3 Evolution of pulmonary gradient 24 hours after banding, before the switch procedure, after the switch procedure, and at last follow-up for group 1 and group 2. The Annals of Thoracic Surgery 2012 94, 1311-1316DOI: (10.1016/j.athoracsur.2012.04.095) Copyright © 2012 The Society of Thoracic Surgeons Terms and Conditions

Fig 4 Increase in left ventricular (LV) posterior wall diameter from before banding to before the switch operation (normalized for body surface area). The Annals of Thoracic Surgery 2012 94, 1311-1316DOI: (10.1016/j.athoracsur.2012.04.095) Copyright © 2012 The Society of Thoracic Surgeons Terms and Conditions