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  • 1990-1994  (7)
  • 1920-1924
  • general relativity  (5)
  • Diagnostic laparoscopy  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical endoscopy and other interventional techniques 8 (1994), S. 361-365 
    ISSN: 1432-2218
    Keywords: Acalculous cholecystitis ; ICU ; Diagnostic laparoscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Patients who require prolonged intensive care following traumatic injuries are at risk for developing acute acalculous cholecystitis (AAC). The diagnosis of AAC is often difficult to establish, resulting in increased morbidity and mortality in this critically ill population. We reasoned that diagnostic laparoscopy might provide a more accurate and timely method of diagnosis. Laparoscopy was performed in nine trauma ICU patients with suspected AAC. Four procedures were considered positive and five were negative. There were no false-positive or false-negative laparoscopic exams, and no procedure-related morbidity occurred. Comparison of multiple clinical, laboratory, and radiologic findings showed that only laparoscopy accurately distinguished between those patients with AAC and those without AAC. We conclude that diagnostic laparoscopy is safe and definitive in trauma ICU patients with suspected AAC and should be performed prior to proceeding with laparotomy.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Surgical endoscopy and other interventional techniques 7 (1993), S. 168-172 
    ISSN: 1432-2218
    Keywords: Acute abdomen ; ICU ; Diagnostic laparoscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Evaluation of a potential acute abdomen in patients who require intensive care for concurrent medical/surgical problems is often difficult due to ambiguities in the physical exam and ancillary diagnostic tests. Between August 1990, and February 1992, 25 ICU patients underwent diagnostic laparoscopy to evaluate a suspected acute intraabdominal process. Thirteen laparoscopies were negative, and 12 were positive. The overall accuracy for laparoscopy was 96% as confirmed by subsequent laparotomy, autopsy, or clinical course. Laparoscopic findings led to a change in management in nine patients (36%), leading to earlier exploration in four patients, and avoidance of laparotomy in five. No significant hemodynamic effects were noted during laparoscopy, and the procedure-related morbidity was low (8.0%). Diagnostic laparoscopy is a safe and accurate guide for managing the ICU patient with a suspected acute surgical abdomen. The use of laparoscopy can help avoid nontherapeutic laparotomy or confirm the need for operative intervention in these complex cases.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Foundations of physics 5 (1992), S. 221-248 
    ISSN: 1572-9524
    Keywords: quantum gravity ; general relativity ; spacetime tangent bundle ; Finsler spacetime ; maximal proper acceleration ; differential geometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Levi-Civita connection coefficients of the spacetime tangent bundle, for the case of a Finsler spacetime, are reduced to the form given by Yano and Davies for a generic tangent bundle of a Finsler manifold. A useful expression is also obtained for the Riemann curvature scalar of a Finsler-spacetime tangent bundle.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Foundations of physics 6 (1993), S. 245-255 
    ISSN: 1572-9524
    Keywords: general relativity ; complex spacetime tangent bundle ; Finsler spacetime ; complex analytic manifolds ; Kähler manifolds ; maximal proper acceleration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is demonstrated that the spacetime tangent bundle, in the case of a Finsler spacetime, is complex, provided that the gauge curvature field vanishes. This is accomplished by determining the conditions for the vanishing of the Nijenhuis tensor in the anholonomic frame adapted to the spacetime connection.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Foundations of physics 4 (1991), S. 523-536 
    ISSN: 1572-9524
    Keywords: quantum gravity ; general relativity ; string theory ; space-time tangent bundle ; maximal proper acceleration ; red shift
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The universal upper limit on attainable proper acceleration relative to the vacuum imposes restrictions on possible structures in the spacetime tangent bundle. Various features of the differential geometry of the spacetime tangent bundle are presented here. Also, a modified Schwarzschild solution is obtained, and the associated gravitational red shift is calculated.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Foundations of physics 5 (1992), S. 43-55 
    ISSN: 1572-9524
    Keywords: quantum gravity ; general relativity ; spacetime tangent bundle ; maximal proper acceleration ; Finsler spacetime ; differential geometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The maximum possible proper acceleration relative to the vacuum determines much of the differential geometric structure of the space-time tangent bundle. By working in an anholonomic basis adapted to the spacetime affine connection, one derives a useful expression for the Riemann curvature scalar of the bundle manifold. The explicit documentation of the proof is important because of the central role of the curvature scalar in the formulation of an action with resulting field equations and associated solutions to physical problems.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Foundations of physics 5 (1992), S. 315-336 
    ISSN: 1572-9524
    Keywords: quantum gravity ; general relativity ; spacetime tangent bundle ; Finsler spacetime ; maximal proper acceleration ; Kähler manifold
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Requirements are delineated for the spacetime tangent bundle to be Kählerian. In particlar, an almost complex structure is constructed in the case of a Finsler spacetime, and its covariant derivative in terms of the bundle connection is shown to be vanishing, provided the gauge curvature field is vanishing. The Levi-Civita connection coefficients and the Riemann curvature scalar are also specified for the Kähler spacetime tangent bundle.
    Type of Medium: Electronic Resource
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