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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 3370-3370 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The Personnel Safety System (PSS) at the Advanced Photon Source is a high reliability, fail-safe, redundant, engineered safety system that provides personnel access control to prevent inadvertent entry into experimental stations when hazardous radiation conditions exist and warns personnel of changes in safe operating conditions inside these stations. Single fault tolerant access control is provided by two independent interlock "chains'' implemented via programmable logic controllers (PLCs). Reduction of common mode failures is accomplished by different hardware and software platforms for the two chains. The system design is presented. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods In Physics Research 212 (1983), S. 135-144 
    ISSN: 0167-5087
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Der Chirurg 71 (2000), S. 1144-1151 
    ISSN: 1433-0385
    Keywords: Schlüsselwörter: Obere Halswirbelsäule ; Tumorchirurgie ; Tumorresektion ; Stabilisierung ; Wirbelkörperersatz. ; Keywords: Upper cervical spine ; Tumor surgery ; Tumor removal ; Stabilization ; Vertebral body replacement.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract. Our own series of tumors of the upper cervical spine was analyzed retrospectively. The standard treatment strategies were reevaluated. A total of nine patients (mean age 61 years, metastasis 4, plasmocytoma 3, chordoma 1, histiocytosis 1) were treated between 1/92 and 2/99. A total of 12 operations were carried out. One-step procedures (6): Three extraoral, one transoral, one dorsal and in one case combined dorsal and extraoral tumor removal were performed. Three dorsal occipitocervical or atlantoaxial stabilizations, one ventral plating and two combined ventral plating plus dorsal three-point fixations, and four vertebral body replacements were carried out. Two-step procedures (3): three extraoral tumor removals with ventral plating plus dorsal three-point fixation, in combination with vertebral body replacement in two cases. The neurological status and the quality of life (Karnofsky performance status, pain levels) were analyzed preoperatively and at the follow-up outpatient examinations (mean follow-up: 18 months). Flexion-extension radiographs were performed at the follow-up. There was no operative mortality. The transient morbidity was 11 %. The operative intervention improved the quality of life in all patients. Three patients died within 27 months of operation. Tumor resection at the upper cervical spine using individually modified surgical strategies over an approach corresponding to the tumor location, stabilization and vertebral body replacement increases significantly the time of survival and quality of life with an acceptable surgical risk for complications.
    Notes: Zusammenfassung: Die eigenen Patienten mit Tumoren der oberen Halswirbelsäule (HWS) werden retrospektiv analysiert, die Indikationen und die operativen Verfahren dargelegt. Zwischen 1/92 und 2/99 wurden 9 Patienten (Durchschnittsalter 62 Jahre, Karcinommetastase 4, Plasmocytom 3, Chordom 1, Histiocytose 1) behandelt. Es erfolgten 12 Operationen; einzeitiges Vorgehen (6): extraorale (3), transorale (1), dorsale (1) und kombinierte dorsale und extraorale Tumorresektion (1) mit dorsaler occipitocervicaler bzw. atlantoaxialer Stabilisierung (3), kombinierter ventraler Plattenosteosynthese plus dorsaler 3-Punktefixierung (2) und ventraler Plattenosteosynthese (1) mit Wirbelkörperersatz (2); zweizeitiges Vorgehen (3): extraorale Tumorresektion (3) mit ventraler Plattenosteosynthese plus dorsaler 3-Punktefixierung (3) mit Wirbelkörperersatz (2). Der neurologische Status und die Lebensqualität (Karnofsky-Performance Status, Schmerzskala) wurden präoperativ und zur Nachuntersuchung (mean follow-up: 18 Monate) erfaßt und die postoperative Stabilität durch Bewegungsaufnahmen nachgewiesen. Die operationsbedingte Mortalität lag bei 0 %, die passagere Morbidität bei 11 %. Weitere Komplikationen wurden nicht beobachtet. Der operative Eingriff verbesserte bei allen Patienten deutlich die Lebensqualität. Drei Patienten sind mittlerweile mit einer durchschnittlichen Überlebenszeit von 27 Monaten nach Operation verstorben. Die Tumorchirurgie an der oberen HWS mit Tumorresektion über einem der Tumorläsion entsprechenden Zugangsweg, osteosynthetischer Stabilisierung und Wirbelkörperersatz ermöglicht eine signifikante Verlängerung der Überlebenszeit und Lebensqualität bei akzeptablen Operationsrisiken.
    Type of Medium: Electronic Resource
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