The non-circular shape of FloWatch®-PAB prevents the need for pulmonary artery reconstruction after banding.Computational fluid dynamics and clinical correlations

Corno, Antonio F.; Prosi, Martin; Fridez, Pierre; Zunino, Paolo; Quarteroni, Alfio; Segesser, Ludwig Karl von

doi:10.1016/j.ejcts.2005.10.029

Cited by 35 publications

(71 citation statements)

References 23 publications

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“…Based upon their observations, Corno and associates suggested that (1) FW-PAB eliminates the need for reoperation to adjust the PAB, not only in the early postoperative period but for as long as 3 years after hospital discharge; (2) postoperative management is simplified and the durations of postoperative mechanical ventilation, ICU stay, and hospital stay are significantly reduced, particularly in more compromised and difficult to manage infants, such as the ones with associated anomalies; (3) the cost of the device is more than offset by the reduction in duration of postoperative mechanical ventilation, length of stay in the ICU and in the hospital, and avoidance of any PAB-related reoperation; and (4) pulmonary artery reconstruction is not required when intracardiac repair is undertaken. 30 Our experience, as reported here, has not affirmed all of the potential advantages of FW-PAB touted by others on the basis of their own observations. We acknowledge the theoretical advantage of FW-PAB for ''ventricular retraining'' purposes, although we have used it only once in such a setting and the surgical literature to date does not describe use of such a device in more than a few instances.…”

Section: Discussioncontrasting

confidence: 78%

Pulmonary Artery Banding

D’Alfonso

Quarti

Colaneri

et al. 2010

World J Pediatr Congenit Heart Surg

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Proponents of a telemetrically adjustable pulmonary artery band (PAB) device have cited simplified postoperative management and shortened length of stay as advantages associated with that technology. This report concerns a recent experience with both conventional pulmonary artery banding (conv-PAB) and the telemetrically adjustable PAB FloWatch (FW-PAB). From January 2005 through December 2008, 19 consecutive infants underwent either conv-PAB (8 patients, mean age 3.5 months, mean weight 4.1 kg) or FW-PAB (11 patients, mean age 2.6 months, mean weight 3.1 kg). Indications for PAB were left ventricular retraining (1 patient in FW-PAB), palliation prior to biventricular repair (7 patients in conv-PAB and 10 in FW-PAB group), and staged univentricular repair (1 patient in conv-PAB). In-hospital mortality was 0%. In the FW-PAB group, 1 FloWatch device was removed because of hemodynamic compromise related to the bulk of the device. There were no major complications in the conv-PAB group and no differences between groups with respect to postoperative ventilation time or length of stay in the intensive care unit or in hospital. In the FW-PAB group, a mean of 3.1 ± 1.7 regulations per patient were undertaken. Of the regulations, 85% (29/34) were adjustments to tighten the device, and 15% (5/34) were to loosen it. During follow-up, 8 patients underwent intracardiac repair and pulmonary artery debanding: 4 in the conv-PAB group and 4 in the FW-PAB group. The course of patients in both groups after PAB were similar. Major differences in length of stay and resource utilization were not apparent.

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Section: Discussioncontrasting

confidence: 78%

Pulmonary Artery Banding

D’Alfonso

Quarti

Colaneri

et al. 2010

World J Pediatr Congenit Heart Surg

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“…2), and normalized wall pressure difference along the length of the domain. The axial component of the velocity u z is normalized with respect to the average axial velocity at the inlet ū i : (30) where Q is the volumetric flow rate calculated from the throat Reynolds number (see table I). The pressure difference data are normalized with respect to the average velocity at the throat ū t : (31) where p z denotes the wall pressure along the z axis and p z=0 is the wall pressure at z = 0.…”

Section: The Fda Benchmarkmentioning

confidence: 99%

Validation of an Open Source Framework for the Simulation of Blood Flow in Rigid and Deformable Vessels

Passerini

Quaini

Villa

et al. 2013

Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotran

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SUMMARYWe discuss in this paper the validation of an open source framework for the solution of problems arising in hemodynamics. The proposed framework is assessed through experimental data for fluid flow in an idealized medical device with rigid boundaries and a numerical benchmark for flow in compliant vessels. The core of the framework is an open source parallel finite element library that features several algorithms to solve both fluid and fluid-structure interaction problems. The numerical results for the flow in the idealized medical device (consisting of a conical convergent, a narrow throat, and a sudden expansion) are in good quantitative agreement with the measured axial components of the velocity and pressures for three different flow rates corresponding to laminar, transitional, and turbulent regimes. We emphasize the crucial role played by the accuracy in performing numerical integration, mesh, and time step to match the measurements. The numerical fluid-structure interaction benchmark deals with the propagation of a pressure wave in a fluid-filled elastic tube. The computed pressure wave speed and frequency of oscillations, and the axial velocity of the fluid on the tube axis are close to the values predicted by the analytical solution associated with the benchmark. A detailed account of the methods used for both benchmarks is provided.

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“…Despite the fact that CFD was originally developed for industrial and engineering purposes, in recent years applications in the biomedical field have also attracted considerable attention (Xu et al 2006), aided by the increasing power of computers (Politis et al 2007). CFD has been previously applied to investigate several problems in the cardiovascular and the respiratory system (Pekkan et al 2005, Yoganathan et al 2005, Corno et al 2006, Jung et al 2006, van Tricht et al 2006, Xu et al 2006, Yang et al 2006a,b, Politis et al 2007.…”

Section: Introductionmentioning

confidence: 99%