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  • 1
    Electronic Resource
    Electronic Resource
    Self-consistent magnetohydrodynamic equilibria for the closure of field-aligned currents in the ionosphere (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 1452-1458 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Results are presented of numerical calculations of self-consistent equilibria based on a simple fluid model for the interaction of plasma and neutral gas in the lower ionosphere (E and F layer). The model focuses on the aspect of the closure of field-aligned (Birkeland) currents which flow into and out of the lower ionosphere. The dependence of the current structure on the parameters of the model and on the boundary conditions is investigated. It is shown that the model is largely consistent with the observed large scale features of the ionospheric current system. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871735
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  • 2
    Electronic Resource
    Electronic Resource
    Spin-resolved time-of-flight electron spectroscopy following excitation with circularly polarized synchrotron radiation (abstract) : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1505-1505 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new type of spectrometer for the spin-polarization sensitive analysis of electrons has been developed. This instrument allows for multichannel detection by employing a retarding-field Mott polarimeter along with a time-of-flight analyzer for the energy selection of the incoming electrons. This method is particularly advantageous for spectra with many lines spread over a wide range of energies, as the whole spectrum can be recorded simultaneously. Such conditions are common for most cases of inner-shell photoionization, where in addition to the photolines a large variety of corresponding Auger lines occurs. The spectrometer was particularly designed to study such processes. First measurements were taken at the crossed-field undulator beamline U2 at BESSY. We obtained results for the Xe 5p photoelectrons in the photon energy range between 42 and 60 eV and for Xe 4d photoelectrons and the following NOO Auger decay at 95 eV. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145890
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  • 3
    Electronic Resource
    Electronic Resource
    Die einzeitige treppenförmige Verlängerungsosteotomie des Femurs (1997)
    Springer
    Der Unfallchirurg 100 (1997), S. 124-132 
    Details
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Beinverkürzung ; Femur ; Verlängerungsosteotomie ; Treppe ; Key words Leg shortening ; Femur ; Prolongation osteotomy ; One-stage ; Step
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Intraindividual length differences up to 1.2 cm in femora, up to 1.0 cm in tibiae and up to 1.4 cm in whole leg length can be regarded as physiological. Length differences in childhood are frequently compensated for by functional adaptation in the chain of adjacent limbs. In adults, however, that adaptability is diminished and correction osteotomy after post-traumatic shortening may therefore be indicated more generously dependent on local and general criteria of operability. A conscientious analysis of bone geometry by clinical means, radiology and computed tomography is mandatory for the indication and planning of any correction osteotomy. Intraindividual leg length differences of more than 4 cm are preferentially treated by continuous callus distraction techniques. Shortening by less than 4 cm, however, is suitable for a one-stage stepwise prolongation osteotomy in the metaphysis of the femur, i.e. in the subtrochanteric or supracondylar region. These osteotomies are than stabilized by long condylar plates; the bony defects are filled up by auto- or allogenous corticospongeous bone. Simple modifications of the stepwise prolongation osteotomy permit additional corrections of torsional deviations up to 20° or of axial deviations in the frontal or sagittal plane up to 5°. The results of 24 one-stage stepwise prolongation osteotomies of the subtrochanteric and supracondylar femur after congenital or post-traumatic shortening are presented as well as the reason and respective therapies for three important complications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050103
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  • 4
    Electronic Resource
    Electronic Resource
    Plica syndrome as a cause of recurrent knee complaints (1998)
    Springer
    Der Unfallchirurg 101 (1998), S. 440-445 
    Details
    ISSN: 1433-044X
    Keywords: Key words Knee joint • Plica • Arthroscopy • Surgery • Treatment outcome ; Schlüsselwörter Kniegelenk • Plicasyndrom • Arthroskopie • Therapie • Ergebnis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Von 1850 zwischen 1991–1995 durchgeführten Kniegelenkarthroskopien wurde in 102 Fällen (5,5 %) die Diagnose „Plica-Syndrom“ gestellt und eine arthroskopische Resektion vorgenommen. In 54 Fällen handelte es sich um ein isoliertes Plicasyndrom; 38 von 54 Patienten konnten im Mittel nach 31 (8–78) Monaten anhand eines modifizierten Fragebogens nach Lysholm nachkontrolliert werden. Von 21 Patienten ohne plicainduzierte Knorpelläsion (Gruppe 1) zeigten 90 % subjektiv ein sehr gutes und gutes und 10 % ein unbefriedigendes Ergebnis. Schlechtere Ergebnisse fanden sich bei den 17 Patienten mit plicainduzierter Knorpelläsion (Gruppe 2) mit 64 % subjektiv sehr guten und guten Resultaten. In beiden Gruppen konnte durch die Operation eine präoperativ bestehende Bewegungsstörung oder Schwellneigung verbessert werden. Die durchschnittliche Nachbehandlungszeit dauerte bei Patienten ohne Knorpelläsion mit durchschnittlich 1,7 Monaten gegenüber 3,2 Monaten bei Vorliegen einer Knorpelläsion nur halb so lang.
    Notes: Summary In a series of 1850 consecutive knee arthroscopies between 1991 and 1995, plicasyndrome was diagnosed and resected by arthroscopy in 102 patients (5.5 %). Clinical response was evaluated for 38 of 54 patients with an isolated plicasyndrome by use of a modified Lysholm questionnaire at an average follow-up of 31 months (range, 8–78 months). Excellent or good results were obtained in 90 % of 21 patients without plica-induced lesions of the cartilage (group 1) and poor results in 10 %. Only 64 % of 17 patients with plica-induced lesions of the cartilage (group 2) had excellent or good results. Both groups showed an improvement for range of motion and swelling postoperatively. The mean time for rehabilitation was 3.2. and 1.7 months for patients with and without cartilage lesions, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050293
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  • 5
    Electronic Resource
    Electronic Resource
    Arthroskopische Kapsel-Labrum-Refixation bei der vorderen Schulterluxation. Primär- oder Sekundärversorgung? (1996)
    Springer
    Der Unfallchirurg 99 (1996), S. 831-835 
    Details
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Arthroskopische Kapsel-Labrum-Refixation ; Akute und chronische Schulterluxationen ; Isokinetik ; Key words Acute and chronic shoulder instability ; Arthrosopic suture repair ; Isokinetic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: We examined 30 patients with an arthroscopic suture repair for anterior shoulder instability in a retrospective evaluation. The follow-up period ranged from 12 to 58 months with an average of 22 months. Arthroscopic suture repairs were done on 14 patients (acute group, average age 26.1 years) with acute detached glenoid labrum, confirmed on arthro-CT, within 10 days after the injury and on 16 patients (secondary group, average age 25 years) with chronic should dislocation. The evaluation according to the Rowe scale resulted in a mean score of 97.1 for the acute group, compared with 92.7 for the secondary group. In each group we found one recurrent dislocation, which in the acute group was due to an adequate trauma. Two of the 14 acute group patients showed a reduction in external rotation of up to 20°, compared with 6 patients in the secondary group. The external rotation of one patient in the secondary group was reduced to 40°. The isokinetic muscle strength was decreased in both groups, both for 60°/s and for 120°/s, to 85% compared with the healthy side. The primary surgical therapy of young patients (below 25 years) with an acute shoulder dislocation and a detached glenoid labrum is recommended owing to the lower redislocation rate, an overall shortened course of treatment and a trend to better postsurgical range of motion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050062
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  • 6
    Electronic Resource
    Electronic Resource
    Arthroscopic Bankart repair with a biodegradable device (1998)
    Springer
    Der Unfallchirurg 101 (1998), S. 537-542 
    Details
    ISSN: 1433-044X
    Keywords: Key words Shoulder instability • Arthroscopic repair • Implants bioabsorbable • Surgical technique ; Schlüsselwörter Schulterinstabilität • Arthroskopie • Resorbierbares Implantat • Operationstechnik
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nach arthroskopisch, mit resorbierbaren Dübeln, versorgter vorderer Schulterluxation wurden 38 Patienten prospektiv durchschnittlich nach 22 (12–33) Monaten nachuntersucht. Das Durchschnittsalter zum Zeitpunkt der Operation betrug 28,4 (15–57) Jahre, das Intervall zwischen Erstluxation und Operation im Mittel 50 (3–244) Monate; 33 Patienten erreichten im Rowe-Score ein ausgezeichnetes Ergebnis, 3 ein gutes und je einer ein mäßiges oder schlechtes Ergebnis. Eine freie Beweglichkeit zeigten 26 Patienten, bei 11 war die Außenrotation 〈 10 ° und bei 1 〈 20 ° eingeschränkt. Die Gesamtreluxationsrate betrug 8 % (je 1 Patient mit 2 maliger Voroperation, habitueller und multidirektionaler Instabilität). Die arthroskopische Versorgung der vorderen Schulterluxation mit resorbierbaren Dübeln führt bei richtiger Indikation und Beachtung operationstechnischer Details zu sehr guten, den offenen Verfahren gleichwertigen Resultaten. Insbesondere Patienten mit unidirektionaler, rezidivierender Schulterinstabilität mit in der Regel gut erhaltenem Kapsel-Band-Gewebe eignen sich für die beschriebene Technik.
    Notes: Summary We examined 38 patients with an arthroscopic bioabsorbable tack repair for anterior shoulder instability in a prospective evaluation. The mean follow-up was 22 months (range 12 to 33). The average age was 28.4 years (range 15 to 57), the operation was performed at average of 50 months (3 to 244 months) after injury. Assessment using the Rowe score revealed excellent results in 33 and good results in 3 patients. 1 patient had a fair result and 1 had a poor result. 26 shoulders obtained full range of motion, 11 had minor (〈 10 °) loss of external rotation, 1 experienced greater (〈 20 °) loss of external rotation. 3 of the 38 patients (8 %) had recurrent instability, 1 patient with 2 preceding operations and atraumatic and voluntary dislocation, respectively. The recurrence rate of arthroscopic Bankart repair with bioabsorbable tacks are comparable to open Bankart procedures. Success of the procedure depends on appropriate surgical technique and suitable selection of patients with unidirectional, posttraumatic, anterior instability who are found to have well-developed ligamentous tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050306
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