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  • 2000-2004  (1)
  • 1985-1989  (1)
  • Acute renal failure  (1)
  • Chlorophyll a fluorescence  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 26 (2000), S. 565-571 
    ISSN: 1432-1238
    Keywords: Key words Cardiopulmonary bypass ; Acute renal failure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To assess the incidence of acute renal failure (ARF) developing perioperatively in adult patients requiring cardiopulmonary bypass surgery (CPB) and to make comparisons with data from the same institution published earlier. Design: Prospective, observational. Setting: Tertiary referral centre for cardiopulmonary medicine. Patients and participants: All patients admitted to the intensive care unit (ICU) who developed ARF perioperatively necessitating continuous veno-venous haemofiltration (CVVH) during the 24 months January 1997–December 1998. Interventions: None. Measurements and results: Of 2337 adult patients undergoing cardiac surgery, 47 (2.0 %) needed CVVH. Patients were excluded from analysis who underwent cardiac transplantation (n = 4), pericardial surgery (n = 3) or insertion of a left ventricular assist device (n = 1). Of the remaining 39, 21 patients died in ICU (53.8 % mortality). Relatively more non-survivors suffered from diabetes, hypertension and preoperative renal dysfunction. A previous report from our Unit revealed that, in 1989–90, 2.7 % of all patients undergoing CPB required CVVH with an in-hospital mortality of 83 %. The current study population were older (65.3 vs 56.0 years in 1990), and more severely ill as evidenced by a higher percentage of patients requiring redo (30 % vs 8.6 % in 1990) and emergency (50 % vs 25.7 % in 1990) surgery. Conclusions: The need for CVVH following CPB may be diminishing despite increased risk factors. ARF-associated mortality in these circumstances is falling.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-5079
    Keywords: Chlorophyll a fluorescence ; photoacoustic spectroscopy ; photosystem I ; photosystem II ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Usisng intact leaves, the extent of the decrease in chlorophyll a fluorescenece caused by the addition of continuous 710 nm light superimposed on modulated (20 Hz) 550 nm light was used to determine the distribution of this absorbed light between photosystems I (α) and II (β). The Fo and Fm levels, which defined the total variable fluorescenece, were taken as equal to those obtained with excess 710 nm light and with saturating blue-green light, respectively. An analogous procedure was used with a photoacoustic detector, saturating white light defining a base line for oxygen yield, the levels with an without 710 nm light being used to define β and α respectively. The two methods gave similar values for the distribution of light between the two photosystems for the experimental conditions used, β averaging 0.55 for a range of Triticum genotypes and Brachypodium sylvaticum grown in high or low light.
    Type of Medium: Electronic Resource
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