Helex

For an accurate in situ 234U/238U and 230Th/232Th isotope microanalysis of silicate glasses and iron oxides, an excimer laser ablation system (HelEx, Lambda Physik Compex llOi ArF ... 

Congenital heart disease (CHD) occurs in approximately 25 000 births per year in the United States. An atrial septal defect (ASD) is a spedfic form of CHD and is the third most common type of defect. Many people suffer from this disorder and in many cases it is only detected when the patient reaches middle age. Effective and efficient methods of repair are therefore needed to minimize the risks associated with traditional methods of ASD repair. In recent years, transcatheter closure methods for secundum type ASD have been developed. Currently the Amplatzer Septal Occluder, the Gore Helex Septal Occluder and the NMT Medical CardioSEAL-STARFiex Septal Occlusion systems have received FDA approval for ASD repair, the first of these only in 2001. This indicates that the use of these devices is still in its infancy. It can therefore be assumed that much more can be done to develop improved and more effective closure devices. It is the purpose of this chapter to describe ASDs and to outline the available technology with regard to transcatheter ASD repair devices. Hie discussion will centre around their construction and functioning, with special reference to their textile component. 

Gore HELEX Septal Occluder Nitinol with ePTFE membrane Small to medium Secundum ASD (smaller than 18 mm) Nonself-centering device Double patch... 

Gore Medical Brochures and Booklets [Internet] [dted 2 April 2009]. Available from http //www.goremedical.com/library/brochure-files7selected products=helex. 

Wilson N. Atrial septal defect closure using the helex device. In H. Sievert, S. A. Qureshi, N. Wilson, Z. M. Hijazi, eds. Percutaneous Interventions for Congenital Heart Disease. London Informa UK Ltd. 2007. 

Wilson N. Interventional closure of defects in the atrial septum using the HELEX septal occluder. In S. J. D. Brecker, ed. Percutaneous Device Closure of the Atrial Septum. United Kingdom Informa Heathcare 2006. 

Latson LA, Jones TK, Jacobson J, Zahn E and Rhodes JE Analysis of factors related to successful transcatheter closure of secundum atrial septal defects using the HELEX septal occluder. Am Heart J 2006 5 151(5) 1129.e7-1129.ell. 

Jones TK, Latson LA,Zahn E,Fleishman CE, Jacobson J,VincentRandKanter K. Results of the U.S. multicenter pivotal study of the HELEX septal occluder for percutaneous closure of secundum atrial septal defects./Aw Coll Cardiol 2007 6/5 49(22) 2215-2221. 

Taaffe M, Fischer E, Baranowski A, Majunke N, Heinisch C, Leetz M, Hern R, Bayard Y, Btlscheck F, Reschke M, Hoffmann I, Wunderlich N, Wilson N and Sievert H. Comparison of three patent foramen ovale closure devices in a randomized trial (amplatzer versus CardioSEAL-STARflex versus helex occluder). Am J Cardiol 2008 5/1 101(9) 1353-1358. 

Taaffe, M., Fischer, E., Baranowski, A., Majunke, N., Heinisch, C., Leetz, M., Hein, R., Bayard, Y., Buscheck, F., Reschke, M., Hoffmann, L, Wunderhch, N., Wilson, N., Sievert, H., 2008. Comparison of three patent foramen ovale closure devices in a randomized trial (Amplatzer versus CardioSEAL-STARflex versus Helex occluder). American Journal of Cardiology 101, 1353-1358. 

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