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  • 1990-1994  (16)
  • 1
    Electronic Resource
    Electronic Resource
    Second harmonic generation as a sensitive technique for estimating Hc1 of high Tc materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 1539-1541 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A simple and interesting technique for measuring the Hc1 of the superconducting grains in bulk high Tc superconductor (HTSC) samples is presented herein. This technique takes advantage of interesting history effects observed in the nonlinear magnetic response of HTSC samples. The hysteretic second harmonic magnetization shows sharp structure at low applied fields due to the magnetic flux trapped inside the grains. This feature is used to track the penetration of magnetic field inside the superconducting granular regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354049
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Beyond the lung: oxygen delivery and tissue oxygenation (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 48 (1993), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1993.tb07186.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    An evaluation of oxygen delivery using nasal prongs (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 47 (1992), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Oxygen delivery using nasal prongs was assessed using a lung model for spontaneous ventilation. The analogue lung was attached to a manikin, which provided a model of the ‘face and pharynx’ to which the nasal prongs were applied. Oxygen concentrations were measured in the model trachea at varying fresh gas inflow and peak inspiratory flows. The study demonstrated enormous variability in the both the peak-inspired (26.3–90.0%) and end-expired concentrations (25.2–78.6%) of oxygen delivered to the trachea. There was a regular relationship between the ratio of peak inspiratory flows, expressed over fresh gas inflow and the end-expired oxygen concentrations which could allow estimation of inspired oxygen concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1992.tb02331.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Colloid solutions in the critically ill (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 47 (1992), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: All patients admitted to an Intensive Care Unit were randomised to receive all volume replacement fluid as either human albumin solution or a synthetic colloid. A total of 475 patients were admitted during the study period. Patients' age, sex, APACHE score and calculated risk of death were assessed on admission. Outcome was assessed as length of Intensive Care stay and mortality. There was no difference between the groups. Subgroups of patients with APACHE score greater than 10, calculated risk of death greater than 50% and length of stay greater than 5 days were also evaluated but no significant differences were found between treatment groups. The use of albumin rather than 3.5% polygeline for volume replacement in the Intensive Care Unit has no influence on outcome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1992.tb01941.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A self-retaining nasopharyngeal airway (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 45 (1990), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1990.tb14541.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Anaesthesia and the lipidoses: a review of patients treated by bone marrow transplantation (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Pediatric anesthesia 2 (1992), S. 0 
    Details
    ISSN: 1460-9592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: There are many potential problems associated with anaesthesia in patients with lipid storage diseases. This review covers an 8-year period (1983–1990) during which time 13 patients presented for procedures associated with bone marrow transplantation. The case notes of 12 patients who underwent a total of 48 general anaesthetics were reviewed. Pre-operative assessment revealed cardiorespiratory disease in six patients. Eighty per cent of the children were anaemic (haemoglobin 〈 95 g1-1). Anaesthesia was tolerated well although tracheal intubation in two patients with Gaucher's disease was difficult and became progressively more difficult as they became older. Forty-five per cent of patients with Gaucher's disease were intubated with a tracheal tube smaller than predicted from the age of the child. Few complications were encountered but those which may be anticipated are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-9592.1992.tb00201.x
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  • 7
    Electronic Resource
    Electronic Resource
    The additional work of breathing imposed by Mapleson A systems (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 48 (1993), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The additional work attributable to breathing through five Mapleson A anaesthetic breathing systems (Magill, Lack, Parallel Lack, Humphrey ADE and Enclosed Magill) was studied using a lung model. With all five systems, the additional work was found to be a function of fresh gas flow, respiratory flow as well as system geometry. Within the range of fresh gas flow and respiratory flows studied, the additional work ranged between 80 mJ.1−1 and 182 mJ.1−1. Expiratory work was always greater than the inspiratory workload, increasing fresh gas inflow into the system increases expiratory work, both resistive and elastic components. The Magill system posed the least work expenditure. The values for the additional work obtained with the lung model were of the same order of magnitude when measurements were taken in volunteers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1993.tb07126.x
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  • 8
    Electronic Resource
    Electronic Resource
    The parallel Lack anaesthetic breathing system (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 48 (1993), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The parallel Lack system is a new modification of the Mapleson A system comprising separate inspiratory and expiratory tubes. To determine that the function of the system was that anticipated of a Mapleson A, the fresh gas flow requirements to prevent rebreathing during spontaneous ventilation were assessed in three situations: (I) a lung model (2) conscious volunteers and (3) anaesthetised patients. Two sets of criteria to define rebreathing were used; (A) those based on changes in ventilation or end-expired carbon dioxide tension and (B) minimum inspired carbon dioxide tension. Using A, rebreathing occurred at afresh gas flow to minute ventilation ratio (Vfjve) of 0.75 for the lung model, and 0.73 for conscious volunteers. These results were comparable to those obtained for a Magill attachment. They were also close to the point at which mechanical dead space began to increase in the lung model. Criteria B gave much lower values for the onset of rebreathing. Rebreathing was present by criteria A in five of the six anaesthetised patients at afresh gas flow of 60 ml.kg ‘.min’ (Vfjvf of 0.78). The results confirm that the parallel Lack behaves as a Mapleson A system. The resistance to breathing posed by the parallel Lack was also comparable to the Magill system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1993.tb07016.x
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  • 9
    Electronic Resource
    Electronic Resource
    Pre-oxygenation: the Hudson mask as an alternative technique (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 47 (1992), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The use of a simple oxygen facemask (Hudson) with high oxygen inflow (48 l.min−1) was investigated as a technique for pre-oxygenation, comparing it with the Magill system (oxygen flow: 100 ml.kg−1.min−1). One hundred and thirty-eight patients scheduled for elective gynaecological and orthopaedic surgery were studied: group 1. Hudson mask and group 2, Magill system (Asa 1–2, n = 107); group 3, Hudson mask and group 4, Magill system (Asa 3, n = 30). Pre-oxygenation was assessed by measuring the times to 97%, 95% and 93% arterial desaturation (finger pulse oximetry) following 3 min of pre-oxygenation. The times taken to achieve these end-points in all the study groups suggest that the Hudson mask offers an alternative technique for pre-oxygenation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1992.tb03203.x
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  • 10
    Electronic Resource
    Electronic Resource
    Rebreathing and the Humphrey ADE breathing system (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 47 (1992), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1992.tb03212.x
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