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Digitale Medien

Percutaneous reposition of dislodged coils in the treatment of a vertebral arteriovenous fistula — with CT follow-up (1991)

Teng, M. M. H. ; Chang, T. ; Huang, C. I. ; [weitere]

Springer

Neuroradiology 33 (1991), S. 195-199

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ISSN: 1432-1920

Schlagwort(e): Vertebral arteriovenous fistula ; Embolization ; Endovascular occlusion ; Detachable balloon ; CT

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Summary We report a case of vertebral arteriovenous fistula, in which embolization was complicated by migration of two coils and a partially inflated balloon. In order to relieve compression to the spinal cord, the displaced balloon was punctured percutaneously. For both relieving compression to the spinal cord and obliterating the residual fistula, the dislodged coils in the partially thrombosed epidural venous sinus were removed percutaneously and placed in the fistula, and more coils were implanted in the fistula percutaneously through the needle. CT follow-up half a year later showed complete resolution of compression of the spinal cord and complete recovery from myelopathy was clinically apparent.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00588216

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Digitale Medien

Chemical potential prediction in realistic fluid models with scaled particle theory (1990)

Pfund, D. M. ; Lee, L. L. ; Cochran, H. D.

Springer

International journal of thermophysics 11 (1990), S. 73-86

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ISSN: 1572-9567

Schlagwort(e): chemical potential ; Kirkwood charging process ; Lennard-Jones fluid ; scaled particle theory

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A procedure frequently proposed in the literature for calculating chemical potentials relies on the Kirkwood charging process. Numerical problems associated with coupling large repulsive forces can be avoided by estimating the contribution to the chemical potential due to these forces with scaled particle theory. The contribution due to soft repulsive forces and attractive forces can be calculated with the Kirkwood charging process using distribution functions for a test particle obtained from integral equation theories. We have used the accurate HMSA theory of Zerah and Hansen to provide distribution functions in mixtures of Lennard-Jones molecules, and we have used the PYP theory of Lee to scale the distribution functions over the charging process. The theory provides accurate estimates of chemical potentials over a range of densities from gas-like to liquid-like when the reduced temperature kT/ɛ is greater than 2. Accurate results for excess free energy changes of mixing are also obtained at these conditions. At lower temperatures accurate results are obtained for low to moderate reduced densities (ρσ 3⩽0.5).

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00503860

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