ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Transvenous Doppler guidewire sonographic monitoring during treatment of a complex vertebral arteriovenous fistula associated with neurofibromatosis Type 1 (1999)

Murayama, Y. ; Usami, S. ; Abe, T. ; [et al.]

Springer

Neuroradiology 41 (1999), S. 328-333

add to mindlist on the mindlist

Details

ISSN: 1432-1920

Keywords: Key words Neurofibromatosis ; Vertebral arteriovenous fistula ; Doppler sonography ; Hemodynamics

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract A Doppler sonographic guidewire was used to monitor incremental changes in draining vein (DV) flow during endovascular occlusion of a complex vertebral arteriovenous fistula (AVF) in a patient with neurofibromatosis type 1. Transvenous monitoring of average peak velocity (APV) and the maximum-minus-minimum peak velocity (MxPV-MnPV) demonstrated a progression from a highly pulsatile, fast flow before embolization to a nonpulsatile, slow flow indicating a successful occlusion of the AVF (hemodynamic endpoint of treatment). Prior to this, apparent angiographic occlusion of the AVF was thought to signify a successful endpoint; however, persistently elevated values for APV and MxPV-MnPV in the DV signalled the presence of an additional contralateral arterial contribution. Transvenous monitoring of flow velocity appears to be ideally suited to establishing a hemodynamic endpoint of embolotherapy in the presence of complex arteriovenous shunting, as may occur with the vasculopathy of neurofibromatosis.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s002340050758

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Tast polarographic determination of Thorium(IV) by means of substitution reduction of Bismuth(III)-ethylenediaminetetraacetate chelate (1978)

Sugawara, M. ; Murayama, Y. ; Kambara, T.

Springer

Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 104-106

add to mindlist on the mindlist

Details

ISSN: 1618-2650

Keywords: Best. von Thorium(IV) ; Polarographie ; Substitutionsreduktion des Bi(III)-ÄDTE-Chelats, Tastpolarographie

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: Summary Thorium(IV) facilitates the reduction of bismuth(III)-ethylenediaminetetraacetate chelate in weakly acidic medium and gives a new wave at a more positive potential, because the EDTA anion liberated by the reduction will be caught immediately by thorium(IV) ion. The height of the substitution reduction wave is proportional to the concentration of thorium(IV) between 0.1 and 0.6 mM. Properties of the wave and the electrode process were investigated.

Notes: Zusammenfassung Thorium(IV) erleichtert die Reduktion des Wismut(III)-ÄDTE-Chelats in schwach sauerem Medium und gibt eine neue Welle bei positiverem Potential, da das durch die Reduktion freigesetzte ÄDTE-Anion vom Thorium(IV)-Ion sofort ergriffen wird. Die Höhe der Substitutionsreduktionswelle ist zwischen 0,1 und 0,6 mM der Thorium(IV)-Konzentration proportional. Eigenschaften der Welle und der Elektrodenvorgang wurden untersucht.