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  • fiber optics  (2)
  • Equestrian sports  (1)
  • Key words Metacarpal fracture • Analysis of literature • Conservative treatment • Operation  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of nondestructive evaluation 6 (1987), S. 57-64 
    ISSN: 1573-4862
    Keywords: Ultrasonics ; fiber optics ; lasers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract This paper describes experiments designed to generate acoustic waves by using a laser pulse, transmitted through fiber optics, to thermally shock the surface of a steel specimen. The purpose of this effort was to explore the noncontacting generation of Rayleigh surface waves appropriate to the interrogation of structures for the detection of subcritical defects, with the ultimate goal of developing an efficient laser-based nondestructive evaluation technique utilizing flexible fiber optics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of nondestructive evaluation 6 (1987), S. 135-146 
    ISSN: 1573-4862
    Keywords: Ultrasonics ; fiber optics ; lasers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract An innovative approach to nondestructive evaluation (NDE) using noncontacting optical sensors has demonstrated. In this effort a single mode optical fiber interferometer (OFI) was used to sense the presence and form of Rayleigh waves traveling along the surface of a steel test bar at a velocity of nearly 3mm/µs. Acousto-optic time-domain data was successfully used to detect the presence and locate the position of a test “flaw” (a machined slot) in the bar, and spectrum analysis was used to estimate its geometry and size. This approach has many potential applications in the ultrasonic evaluation of real flaws in structures with complex geometries. Coupled with the authors' earlier work demonstrating the feasibility of generating acoustic waves in metals using laser light pulses transmitted through the fiber optic probes, this latest achievement points to the development of a fully noncontacting, fiber optic based thermal-acousto-photonic (TAP) NDE system, with potential applications to the reliability testing of many important structures where composition, scale, geometry, or restricted access preclude the use of conventional NDE techniques.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Der Unfallchirurg 103 (2000), S. 688-692 
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Jockey ; Pferderennen ; Wirbelkörperfraktur ; Pathomechanismus ; Reitunfall ; Key words Jockey ; Equestrian sports ; Vertebral fracture ; Pathomechanism ; Horse-racing-related injury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Two cases of severe spinal cord injuries to professional horse-racing jockeys are presented. There is only one comprehensive study conducted to ascertain the nature and incidence of injuries in the literature. The pathomechanism and surgical therapy of vertebral trauma in jockeys was analysed.
    Notes: Zusammenfassung Es werden zwei schwere Wirbelsäulenverletzungen bei professionellen Jockeys vorgestellt. Der Pathomechanismus wurde anhand einer Videoaufzeichnung des Unfallhergangs analysiert. Die aktuellen Therapiekonzepte werden nach Darstellung der Literatur diskutiert. Die schwere Wirbelsäulenverletzung des Jockeys ist ein Arbeitsunfall und bedarf der interdisziplinären Diagnostik und Therapie.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1433-044X
    Keywords: Key words Metacarpal fracture • Analysis of literature • Conservative treatment • Operation ; Schlüsselwörter Mittelhandbruch • Literaturrecherche • Konservative Therapie • Operation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Da auch heutzutage die Behandlung der Mittelhandbrüche kontrovers diskutiert wird, wurde eine Literaturanalyse durchgeführt, um die unterschiedlichen Therapien, Indikationen und deren Ergebnisse aufzuzeigen. Aus der Literatur vom 1. 1. 1984–31. 03. 1996 wurden Daten von 1602 nachuntersuchten Patienten verglichen; 522 operativ versorgte Patienten wurden mit Kirschner (K)-Drähten, Schrauben, Plättchen, Cerclage oder Minifixateur externe behandelt. Die konservativen Ansätze reichen von der Immobilisation bis hin zu unterschiedlichsten frühfunktionellen Methoden mit verschiedensten Hilfsmitteln oder gar ohne jede Fixation des Bruches. Die frühfunktionelle Therapie mit einem Brace kam bei 95 % zu sehr guten und guten Ergebnissen, hatte aber eine Therapieabbruchrate von bis zu 23 % aufgrund von lokalen Druckstellen und Hautnekrosen (3 %). Die teilweise Ruhigstellung mit unterstützendem Handcast, Tape etc. kam bei 94 % zu sehr guten und guten Ergebnissen. Hierbei traten keine Komplikationen auf. Jeweils 85 % sehr gute und gute Resultate erzielten die operativen Verfahren und die Immobilisationsbehandlung. Die Reposition von Mittelhandknochen (MHK)-V-Frakturen hatte nur bei 15 % der Patienten Erfolg. Metarkapalefrakturen mit Dislokationen unter 30 °, einer Verkürzung von weniger als 5 mm, einer Rotationsfehlstellung unter 10 °, keiner Gelenkstufe und ohne relevantes Weichteiltrauma benötigen nach unseren Ergebnissen keine Operation und sollten auch nach den Ergebnissen der Literaturrecherche frühfunktionell behandelt werden. Bei Überschreitung dieser Grenzen ist eine primäre operative Therapie gerechtfertigt. Die Immobilisation von Mittelhandfrakturen über mehr als 3–4 Wochen ist nicht sinnvoll.
    Notes: Summary As the treatment of metacarpal fractures is today still a controversial subject, we conducted an analysis of the literature in order to present the different therapy guidelines, indications, and their results. The data from the follow-up of 1602 patients was taken from literature which dated from 1 January 1984 to 31 March 1996. A total of 522 patients who underwent surgery received K-wires, screws or external minifixateur. The conservative approaches ranged from immobilization to various methods of mobilization with different aids or without fixation of the fracture. The mobilization in a brace provided good to excellent results in 95 % of the cases; however, the failure rate of therapy was 23 % because of local bruises and skin necrosis (3 %). The mobilization with handcast, tape etc. attained good to excellent results in 94 % of the cases. Here, no complications occurred. Both the immobilization treatment and the surgery provided good to excellent results in 85 % of the cases. The reposition of fractures of the fifth metacarpal was successful in only 15 % of the cases. Fractures with dislocations below 30 °, a shortening of less than 5 mm, no rotational displacement or that below 10 °, no articular incongruency, and no relevant soft tissue trauma do not need surgery according to our results and should be treated with early mobilization as suggested by the survey. Beyond these limits a primary surgical therapy is justified. The immobilization of metacarpal fractures over a period of more than 3–4 weeks is not necessary.
    Type of Medium: Electronic Resource
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