Myriam Almeida‐Jones^1,2, Nai Yu Tang^1,2, Aneela Reddy³, Evan Zahn^1,2

Congenital Heart Disease, Vol.14, No.1, pp. 60-64, 2019, DOI:10.1111/chd.12712

Abstract Clinically significant patent ductus arteriosus (PDA) has been associated with signifi‐ cant morbidity in extremely low birth weight (ELBW) infants. Current management of ELBW infants with hemodynamically significant PDA includes supportive treatment, pharmacological therapy, and surgical ligation. All of these therapeutic options have their advantages and limitations. More recently, transcatheter PDA closure has been described as a viable option in this population. In this paper, we provide a compre‐ hensive review of this emerging procedure. More >

Shyam Sathanandam, Ashley Gianinni, Eric Sefton, Kaitlyn Greer, Nathan Stecchi, Kimberly Allen, Ranjit Philip, B. Rush Waller

Congenital Heart Disease, Vol.14, No.1, pp. 85-89, 2019, DOI:10.1111/chd.12710

Abstract Objective: The objective of this article is to describe a live case transmission of tran‐ scatheter closure of a patent ductus arteriosus (PDA) in an extremely low birth weight (ELBW) infant during the first International PDA Symposium conducted in Memphis, Tennessee.
Setting: A multidisciplinary team approach including audiovisual specialists, informa‐ tion technology specialists, physicians, nurses, and other health care specialists was required to perform the transcatheter PDA closure (TCPC) in an ELBW infant at LeBonheur Children’s Hospital and the procedure was broadcast live to the attend‐ ees at the International PDA Symposium allowing for a two‐way audiovisual discus‐ sion during… More >

Leah Apalodimas, Benjamin Rush Waller III, Ranjit Philip, Judy Crawford, Jorden Cunningham, Shyam Sathanandam

Congenital Heart Disease, Vol.14, No.1, pp. 90-94, 2019, DOI:10.1111/chd.12705

Abstract Objectives: Patent ductus arteriosus (PDA) is a common finding in preterm infants. A hemodynamically significant PDA may require intervention for closure. This article aims to describe a transcatheter PDA closure (TCPC) program for preterm infants and the components of a comprehensive outpatient follow-up strategy.
Setting: A multidisciplinary team approach including neonatology, cardiology, anesthesiology, medical transport team, pulmonology, cardiac surgery, neurodevelopmental specialist, nutrition, speech therapy, social work, research collaborators, and other health care specialists is integral to the dedicated care and promotion of wellness of extremely low birth weight (ELBW) infants.
Patients: To date, we have performed TCPC on 134 ELBW… More >

Govinda Paudel, Vijaya Joshi

Congenital Heart Disease, Vol.14, No.1, pp. 42-45, 2019, DOI:10.1111/chd.12703

Abstract Management of the patent ductus arteriosus (PDA) in the premature infant has been a point of controversy for decades as smaller and earlier gestational age infants have been surviving. Increasing experience with catheter‐based device closure has gener‐ ated a new wave of interest in this subject. In this era, echocardiography plays a cen‐ tral role for collaboration within a multispecialty team. Reliability of echocardiography is improved by applying an institutionally derived standard approach to imaging, data collection, and reporting. The key aspects of both the physiology and anatomy of the PDA to distinguish infants that may benefit from intervention are… More >

Ranjit Philip¹, Jason Nathaniel Johnson^1,2, Ronak Naik¹, Dai Kimura^1,3, Umar Boston¹, Sandeep Chilakala¹, Benjamin Hendrickson¹, Benjamin Rush Waller¹, Shyam Sathanandam¹

Congenital Heart Disease, Vol.14, No.1, pp. 37-41, 2019, DOI:10.1111/chd.12702

Abstract The hemodynamic effects of a patent ductus arteriosus (PDA) are well known including systemic hypoperfusion and volume overload on the left ventricle. This article aims to provide a review of the long-standing effect of a hemodynamically significant PDA on the pulmonary vasculature and the role of cardiac catheterization in preterm infants with a PDA and pulmonary hypertension. More >

Ranjit Philip¹, Jeffrey A. Towbin¹, Shyam Sathanandam ¹, Jason Goldberg¹, Thomas Yohannan¹, Nithya Swaminathan¹, Jason Nathaniel Johnson^1,2

Congenital Heart Disease, Vol.14, No.1, pp. 33-36, 2019, DOI:10.1111/chd.12701

Abstract There continues to be controversy on the long‐term effects of a patent ductus arte‐ riosus (PDA) and its management. However, the hemodynamic effects of a large PDA in a preterm infant are well known. This article aims to provide insight into the adap‐ tive changes and remodeling effects of a PDA on the myocardium in preterm infants. More >

H. M. Choi, L. S. Cho, M. H. Ryu J. S. Cho¹, C. T. Kim²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.1, pp. 7-8, 2009, DOI:10.3970/icces.2009.012.007

Abstract The experimental study on the wake characteristics of turbomachineries is essential, when developing the turbomachineries such as pumps, fans, compressors, turbines. Various sources of losses are analyzed by studying the wake characteristics of turbomachineries. For more accurate analysis, various types of experimental equipments are used. Because of the high frequency response characteristics, the hot-wire anemometery has been widely used to measure the wake characteristics of the turbomachinery. In this research, the flow fields of the small ducted fan as a propulsion device of small R/C aircraft were measured using a hot-wire anemometry at inlet and outlet to analyze the wake… More >

Bin Dong^1,2,3, Changyong Jiang^1,3,*, Xiang Liu^1,3, Lixi Huang^1,3

The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.2, pp. 26-26, 2019, DOI:10.32604/icces.2019.05017

Abstract How to reduce fan noise has always been a significant research topic in equipment ranging from small-scale devices, such as computer cooling fans and building ventilation fans, to large high bypass ratio turbo engines. In recent years, in order to produce higher pressure rise or larger flow rate with lower noise level in the fan stage, interest in the contra-rotating fan (CRF) configuration has been rekindled. The Vold-Kalman order tracking filter technique was employed to separate tonal and broadband noise components from CRF acoustic data to study the characteristics of the noise spectrum. Based on the spectrum peaks, noise reduction… More >

G. Kosec¹, B. Šarler²

CMES-Computer Modeling in Engineering & Sciences, Vol.47, No.2, pp. 191-216, 2009, DOI:10.3970/cmes.2009.047.191

Abstract This paper explores an application of a novel mesh-free Local Radial Basis Function Collocation Method (LRBFCM) [Sarler and Vertnik (2006)] in solution of coupled heat transfer and fluid flow problems with solid-liquid phase change. The melting/freezing of a pure substance is solved in primitive variables on a fixed grid with convection suppression, proportional to the amount of the solid fraction. The involved temperature, velocity and pressure fields are represented on overlapping sub-domains through collocation by using multiquadrics Radial Basis Functions (RBF). The involved first and second derivatives of the fields are calculated from the respective derivatives of the RBF's. The… More >

Mustapha FARAJI¹

FDMP-Fluid Dynamics & Materials Processing, Vol.13, No.1, pp. 19-36, 2017, DOI:10.3970/fdmp.2017.013.019

Abstract A two-dimensional numerical model that accounts for heat transfer by conduction and natural convection in the molten region of nano enhanced Phase Change Material (PCM) is performed. Numerical investigations were conducted using an enthalpy- porosity method in order to examine the impact of the dispersion of copper (CuO) nanoparticles on the heat source temperature and the effect on the heat sink secured working time and the melting rate. Results show that heat spreads more easily along the conducting plate and to the PCM and, consequently, the PCM melts rapidly and the heat source is efficiency cooled by the addition of… More >