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  • 25.40  (1)
  • Respiratory mechanics  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Elevated static compliance of the total respiratory system: Early predictor of weaning unsuccess in severe COPD patients mechanically ventilated (1995)
    Springer
    Intensive care medicine 21 (1995), S. 399-405 
    Details
    ISSN: 1432-1238
    Keywords: Respiratory mechanics ; Weaning prediction ; COPD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective To assess in a group of COPD patients mechanically ventilated for an episode of acute respiratory failure the respiratory mechanics with a simple and non invasive method at the bedside in order to evaluate if these parameters may be predictive of weaning failure or success. Design A prospective study. Setting Intensive care and intermediate intensive care units. Patients 23 COPD patients ventilated for acute respiratory failure and studied within 24 hours from intubation. Methods Using end-expiratory and end-inspiratory airway occlusion technique, we measured PEEPi, static compliance of the respiratory system (Crs, st) maximum respiratory resistance (Rrsmax) and minimum respiratory resistance (Rrsmin). Measurements and results The weaned group (A) and the not weaned group (B) were not different regarding to static PEEPi (group A 8.5±4.0 vs group B 8.9±2.6 cmH2O), to Rrsmax (22.4±5.3 versus 22.2±9.0 cmH2O/l/s) and to Rrsmin (17.6±5.5 versus 17.9±8.0 cmH2O/l/s), while a significant difference (p〈0.001) has been found in Cst, rs (62.7±17.5 versus 111.6±18.0 ml/cm H2O). The threshold value of 88.5 ml/cmH2O was identified by discriminant analysis and provided the best separation between the two groups, with a sensitivity of 0.85 and a specificity of 0.87. Conclusion Cst, rs measured non invasively in the first 24 h from intubation, provided a good separation between the patients who were successfully weaned and those who failed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01707408
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  • 2
    Electronic Resource
    Electronic Resource
    Experimental investigation of vibrational excitations in230Th (1994)
    Springer
    The European physical journal 350 (1994), S. 13-28 
    Details
    ISSN: 1434-601X
    Keywords: 23.20 ; 25.40 ; 27.90.+
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Nuclear levels in230Th have been investigated in theβ decay of230Pa, the230Th(d, pnγ) reaction and the232Th(p, t) reaction. TheK π=0 1 + , 2 1 + , and 2 2 + bands with band heads at 635, 781, and 1010 keV were observed up to the 8+, 9+, and 7+ levels, respectively. A second excited 0+ level was identified at 1297 keV which might be interpreted as the usualβ shape-oscillation. The branching ratios of theE2 transitions from the 0 1 + , 2 1 + , and 2 2 + bands are explained in the framework of the rotational model by taking into account the coupling of these bands with the ground-state band, and the coupling between the 0 1 + and 2 1 + band. A strong enhancement ofE2 transitions from the 2 1 + to the 0 1 + band reported earlier is not confirmed. For the octupole vibrations withK π=0−, 1−, and 2− theE1 branching ratios are analyzed in terms of the Coriolis coupling of these bands. An almost complete experimental set ofE1 transition moments from these negative-parity bands to the 0 g + , 0 1 + , and 2 1 + bands was obtained. It is suggested that octupole correlations might be important in explaining theseE1 moments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01285047
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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