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  • 2000-2004  (2)
  • Key words: Cadmium; sediment slurries; tungsten and rhodium; permanent modifier; electrothermal atomic absorption spectrometry.  (1)
  • Koronarsinusdilatation  (1)
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  • 2000-2004  (2)
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  • 1
    ISSN: 1436-5073
    Keywords: Key words: Cadmium; sediment slurries; tungsten and rhodium; permanent modifier; electrothermal atomic absorption spectrometry.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract.  A tungsten-rhodium coating on the integrated platform of a transversely heated graphite atomiser (THGA) was used as a permanent chemical modifier for the determination of Cd in sediment slurries by electrothermal atomic absorption spectrometry. Slurries were ultrasonicated during 20 s before being delivered to the previously W-Rh treated platform. The permanent W-Rh modifier remains stable by approximately 250 measurements when 20 μl of slurries containing up to 1.0% m/v are delivered into the atomiser. In addition, the permanent modifier increases the tube lifetime up to 720 analytical firings. Also, when the W-Rh permanent modifier was employed, there was less variation of the slope of the analytical curves during the total atomiser lifetime, resulting in a decreased need of re-calibration during routine analysis, increasing the sample throughput. The atomiser lifetime was limited to the THGA wall durability, because the W-Rh treated platform was intact after more than 720 analytical firings. Detection limits based on integrated absorbance for 1.0% m/v slurries were 1.5 ng g−1 Cd for 250 μg W +200 μg Rh permanent modifier and 11.5 ng−1 Cd for 5 μg Pd +3 μg Mg(NO3)2. Results for the determination of cadmium in sediment slurries using the W-Rh permanent modifier were in agreement with those obtained with dissolved sample solutions by using Pd + Mg(NO3)2, since no statistical differences were found by the paired t-test at the 99% level.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Der Anaesthesist 49 (2000), S. 25-28 
    ISSN: 1432-055X
    Keywords: Schlüsselwörter ; Koronarsinusdilatation ; perioperative transösophageale Echokardiographie ; persistierende linke obere Hohlvene ; Kardioanästhesie ; Herzchirurgie ; Key words ; Dilated coronary sinus ; Perioperative transesophageal echocardiography ; Persistent left superior vena cava ; Cardiac anaesthesia ; Cardiac surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract A 36-year old woman was presented to our hospital with congenital ventricular septal defect and one-vessel coronary artery disease (75% proximal left main coronary artery) for CABG and repair of the VSD. After induction, a transesophageal echocardiographic (TEE) baseline examination was performed, showing a severely dilated coronary sinus (CS) measuring approximately 3 cm (abnormal 〉1 cm). We suggested a persistent left superior vena cava (PLSVC) draining into the CS. PLSVC is a common venous congenital anomaly, with a reported incidence of 0.5% in general population and in 3–5 % of patients with congenital heart defect. Injection of echo-contrast solution in a left arm vein, visualizing microbubbles passing through the PLSVC into the CS confirmed our suspicion. The diagnosis of a PLSVC and dilated CS is a contraindication for retrograde cardioplegia because of the loss of cardioplegia into the PLSVC resulting in a inadequate myocardial protection. It may be difficult to pass a pulmonary artery catheter (PAC) through a left internal or left subclavian vein and it may be associated with arrythmias. A chest radiograph shows the anomalous course of the PAC along the left heart.
    Notes: Zusammenfassung Eine 36jährige Frau, mit einem kongenitalen Ventrikelseptumdefekt (VSD) und einer koronaren 1-Gefäßerkrankung (75% Hauptstammstenose) wurde unserem Krankenhaus zur Koronarbypassoperation und Verschluß des VSD zugewiesen. Nach der Narkoseeinleitung führten wir eine transösophageale echokardiographische Basisuntersuchung durch. Es zeigte sich ein deutlich dilatierter Koronarsinus (CS) von ca. 3 cm Durchmesser (abnormal 〉1 cm). Man vermutete eine persistierende linke obere Hohlvene (PLSVC), die sich in den CS drainiert. Die PLSVC ist eine venöse kongenitale Annomalie mit einer Inzidenz von 0,5% in der Normalbevölkerung und von 3–5% bei Patienten mit kongenitalen Herzerkrankungen. Nach Injektion von Echokontrastmittel über eine linke Armvene zeigten sich sog. Microbubbles im CS und bestätigten unsere Verdachtsdiagnose. Die Diagnose einer PLSVC und eines dilatierten CS gilt als eine Kontraindikation für die retrograde Kardioplegie, da es über die PLSVC zum Verlust von Kardioplegie, mit daraus resultierender unzureichender Kardioprotektion kommt. Die Plazierung eines Pulmonalarterienkatheters über die linke V. jugularis interna oder die linke V. subclavia kann erschwert sein und zu Herzrhythmusstörungen führen. Eine Röntgenthoraxaufnahme zeigt den ungewöhnlichen Verlauf des PAK entlang des linken Herzschattens.
    Type of Medium: Electronic Resource
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