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  • 1
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    German Medical Science; Düsseldorf, Köln
    In:  67. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 89. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie und 44. Tagung des Berufsverbandes der Fachärzte für Orthopädie; 20031111-20031116; Berlin; DOC03dguB1-10 /20031111/
    Publication Date: 2003-11-11
    Keywords: ddc: 610
    Language: German
    Type: conferenceObject
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  • 2
    ISSN: 1432-1246
    Keywords: Shoulder and neck pain ; Risk factors ; Psychological factors ; Psychosocial factors ; Work
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Risk factors associated with work-related shoulder and neck myalgia were investigated in a case-control study with pairs matched for age, gender, and physical exposure. Guided interviews with standardized and self-constructed questionnaires were performed among manual (n = 15 pairs) and office (n = 24 pairs) workers. Perceived general tension was the variable with the strongest association with shoulder and neck pain in both work groups. Otherwise, the results in the two groups were very different, indicating that different risk factors and mechanisms were associated with shoulder and neck pain in the two work groups. The study provides background information for future attempts to establish causal relationships between physical and psychosocial exposure and shoulder and neck pain, which can be more accurately investigated in a longitudinal rather than a cross-sectional experimental design.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2277
    Keywords: Xenotransplantation ; Total lymphoid irradiation, in xenotransplantation ; Immunosuppression, in xenotransplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Treatment with preoperative total lymphoid irradiation and post-transplant cyclosporin A has been shown to have a synergistic effect on graft survival in allo-and xenotransplantation. Specific monoclonal antibodies against T cells and T cell subpopulations could offer new ways of preventing graft rejection in xenotransplantation. Graft survival and histology were examined after total lymphoid irradiation plus cyclosporin A treatment versus cyclosporin A plus a monoclonal antibody in a concordant, heterotopic, hamster-to-rat heart transplantation model. Preoperative total lymphoid irradiation was given at a dose of 1.25 Gy, 12 times over a period of 3 weeks. Cyclosporin A at a dose of 12.5 mg/kg per day was administered perorally and OX-19, a pan T cell monoclonal antibody, was given as intraperitoneal injections at doses of 100 μg or 500 μg/kg per day from day 0 until graft rejection. While total lymphoid irradiation alone prolonged graft survival to 9.4 days, total lymphoid irradiation plus cyclosporin A extended graft survival to a mean of 22 days. Cyclosporin alone or combined with the monoclonal antibody could not increase graft survival significantly when compared to untreated animals, which rejected their grafts within 3.7 days. Vascular rejection was the characteristic morphological finding, even after some weeks of excellent graft function. In conclusion, total lymphoid irradiation and cyclosporin A had a synergistic effect on graft survival in this concordant xenotransplantation model, although recent impressive results from other groups could not be reproduced. Total lymphoid irradiation combined with cyclosporin A appears to delay a primary humoral graft rejection, while the mechanism of rejection, judged by histology, stays the same.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of virology 70 (1981), S. 11-19 
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Baby rabbits surviving infection with pleural effusion disease virus (PEDV) developed viraemia persisting for at least six months. Only the infectious serum samples collected during the first 2 months of disease could transfer the typical PED. Six months after neonatal infection, virus concentration in serum was 102 to 104 rabbit-infectious doses per ml, the level of IgG appeared elevated, and serum rendered non-infectious by ether-treatment had a protective effect in passive immunisation experiments. No evidence of glomerulonephritis or deposits of immunoglobulins could be demonstrated in the kidneys. During the nursing period PEDV was transmitted from infected baby rabbits to two out of four dams, but not to control litter-mates. After the nursing period control rabbits, caged together with the viraemic rabbits for 60 to 150 days, remained free from PEDV infection.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Few body systems 15 (1993), S. 129-143 
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We propose a hyperspherical adiabatic formalism for the calculation of the 3-to-3S-matrix at low energy, for repulsive potentials, and use it then in a model calculation. That is for McGuire's model (3 particles in one dimension subject to repulsive delta-function interactions), we use analytical expressions for the hyperspherical adiabatic basis, the adiabatic coupling matrix elements, and eigenpotentials to obtain the first terms of the exactS-matrix analytically, in an expansion in powers of the wave number. We were able to associate the definite powers ofq in the expansion of theS-matrix to the corresponding inverse powers of ρ in the expansions of the adiabatic eigenpotentials and coupling matrix elements. We investigate the effect of making the “usual” approximations found in the literature (extreme and uncoupled adiabatic approximations), when calculating the diagonal and off-diagonalS-matrix elements. Finally, we show that the coupled adiabatic equations uncouple as the energy goes to zero.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Few body systems 23 (1998), S. 87-109 
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. For a model of three particles on a line, subject to attractive delta-function interactions, we consider the phase shift. We do this from the point of view of the calculation of the S-matrix in a hyperspherical adiabatic basis (an adiabatic S-matrix), and for energies ranging from the (negative) energy of the two-body bound state to a total energy of zero. We derive analytical expansions and present numerical work, for different approximations, and compare with the exact results that we obtain from the work of McGuire, whose model we have borrowed. We show that the simplest adiabatic approximation gives results that are qualitatively wrong, but that better approximations yield, for most of our range, excellent agreement with the exact result. Understanding the threshold behaviour, however, requires a zero-energy three-body bound state, or resonance, previously unsuspected for this model. The methods developed for the case of the simplest adiabatic approximation also yield threshold and low-energy results applicable to the two-body problem in two dimensions.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 18 (1994), S. 131-134 
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Cinq cas de fracture par enfoncement du plateau tibial externe ont été traités par relévement du fragment impacté, greffe osseuse et vis à spongieux. Au cours de l'intervention des marqueurs au tantale ont été placés dans le fragment enfoncé et dans la métaphyse tibiale pour analyse stéreophotogramétrique. En post-opératoire un plâtre a été maintenu pendant un mois et l'appui n'a été autorisé qu'à la fin du troisième mois. Une récidive de l'enfoncement du fragment relevé (2.8 mm au maximum) est survenue dans trois cas, durant le premier mois post-opératoire. Les auteurs concluent que la mise en décharge post-opératoire n'est pas indispensable et qu'une mobilistion précoce plus active pourrait être envisagée.
    Notes: Summary Five cases of fracture of the lateral tibial condyle of the split-depression type were treated by elevation of the depressed fragment, bone grafting and cancellous bone screws. During the operation, tantalum markers were inserted into the depressed fragment and the tibial metaphysis for radiographic stereophotogrammetric analysis. Postoperatively a plaster cast was applied for one month and weightbearing was not allowed for 3 months. In three cases, a depression of the elevated fragment, at the most 2.8 mm, recurred during the first month after operation. This was not considered to be significant and more aggressive postoperative mobilisation may be warranted.
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  • 8
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé La fixation de prothèses du genou PCA Modular à tige tibiale cruciforme, cimentée ou non, a été étudiée par analyse stéréophotométrique, 6 semaines après l'intervention, chez 26 patients randomisés. Des contraintes externes physiologiques ont été appliquées en rotation externe et interne et l'accroupissement a simulé la mise en charge excentrique postérieure. Dans tous les cas un déplacement provoqué a pu être constaté. Une différence statistiquement significative, entre les deux groupes, n'a pu être mise en évidence ni pour le déplacement provoqué, ni pour la migration initiale, à l'exception de l'abaissement constaté entre les positions couché sur le ventre et debout (0,0 pour le groupe cimenté contre 0,2 mm pour le non-cimenté, p〈0.05). Dans certains cas le déplacement le plus important a été noté durant le passage de la position de repos à la position debout ou lors des contraintes en rotation interne-externe, alors que dans d'autres cas le déplacement le plus grand a été observé lors de l'accroupissement. Une différence statistiquement significative de l'abaissement de la prothèse dans cette position a été constatée, puisqu'il est nul pour les pièces cimentées et de 0,2 mm pour les non-cimentées (p〈0,05). La forme de la prothèse avec une queue cruciforme ainsi que l'utilisation d'une lame de scie à refroidissement interne peuvent expliquer que la différence ne soit que minime entre les deux groupes, cimenté et non-cimenté.
    Notes: Summary The fixation of cemented and uncemented PCA modular cruciform-stemmed tibial components was examined 6 weeks after operation using roentgenstereophotogrammetric analysis in 26 randomly selected patients. Physiological external forces were applied in external/internal rotation and eccentric posterior loading generated by squatting. All cases showed inducible displacement, but there were no statistically significant differences between the 2 groups in inducible displacement or in the initial migration, except for subsidence between the lying and standing position. In some, the greatest movement was found when changing from resting to standing, or during rotational stress; in others, the greatest movement was found during squatting. There was a statistical difference in subsidence on squatting which was greater in the uncemented group. The design of the cruciform stem and the use of an internally cooled saw may explain this small differences between the 2 groups.
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  • 9
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the integro-differential-equation approach (IDEA) and its associated hyperspherical-harmonic expansion method (HHEM) terms appear involving the potential for a single pair of particles. This introduces a spurious component in the potential that is eliminated in the Schrödinger equation by summing over all pairs. We calculate the contribution of this spurious potential in the solution of the HHEM for an even number of bosons in the ground state, using the Afnan-Tang S3 and Malfliet-Tjon MT5 interactions.
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  • 10
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We obtain a set of four-dimensional hyperspherical harmonics in closed form. These harmonics are not only quantized with respect to the rotation group (O 2), but are an irreducible basis for the permutation groupS 3. An additional symmetry is found which allows us to write hyperspherical harmonics classified with respect to a 12 element groupS 3×i×O 2. We give a set of three mutually commuting operators whose eigenvalues uniquely characterize each spherical harmonic with respect to degree, symmetry, and angular momentum in the plane.
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