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Schlechte funktionelle Ergebnisse nach Larnyektomie sind durch die logopädische Therapie nur eingeschränkt zu bessern. Ziel der Studie war es durch Korrelation von Antomie und Funktion eine Grundlage für eine eventuelle sekundäre operative Stimmverbesserung zu schaffen. Patienten: 36 Patienten; Stimmmodus: Flüstersprache 3, Elektrolarynx 3, Provox®-Prothese 20; Ösophagusersatzstimme 10. Stimmlichen Leistungsfähigkeit: RBH-Skalierung, Postlaryngektomietest nach Pfrang und Zenner; Worte pro Atemzug und Worte pro Minute; maximale Phonationsdauer des Vokals "a"; Umfang der Stimmdynamik in dB und Halbtonschritten beim Reihensprechen und beim Phonieren des Vokals "a"; Anzahl der stimmhaften Samples in % beim Phonieren des Vokals "a". Gesamtscore aus 17 Parametern. Anatomische Strukturen mittels Videokinematographie: Länge der Pseudoglottis (PG); Querdurchmesser der PG; Querdurchmesser HWK3; Einschnürkoeffizient: PG-Querdurchmesser/Durchmesser HWK 3; Form der Pseudoglottis (plump/schlank). Statistik: Spearman-Korrelation. Der Gesamtscore und eine Reihe der Subscores der Stimmqualität korrelierte signifikant positiv mit dem Querdurchmesser der Pseudoglottis (Korrelationskoeffizient p = 0,359) und dem Einschnürquotienten der Pseudoglottis (p = 0,432). Die gefundene Korrelation kann Basis für eine operative Intervention sein.

Hot section gas turbine engine components have relied on the use of superalloys which contain high percentages of strategic elements to attain an optimum compromise of high temperature strength, corrosion and oxidation resistance. Due to limited availability and price fluctuations of certain key alloying elements, such as cobalt and tantalum, selection and substitution of superalloys with lower strategic element content is being accomplished. The change in alloy often leads to the use of materials with less corrosion and oxidation resistance. This paper describes the development of protective coatings that have enabled the implementation of less environmentally stable alloys with no loss, and sometimes an increase, in component capability and life. Development of tailored MCrA1Y overlay coatings, improved diffusion aluminides, thermal barriers, and alternate wear resistant coatings has enabled the coating corrosion and oxidation life to be more independent of the base superalloy composition and hence allow more latitude in alloy selection. The resulting coating developments and their effects on reducing strategic element use are presented., This article is from the Proceedings of the Meeting of the Structures and Materials Panel (57th) Held at Vimeiro, Portugal on 14-19 Oct 83, AD-A148 598, p18-1 - 18-7.

The worldwide shortages and price escalations of cobalt, titanium, tantalum and other key elements in the late 1970's instigated manufacturing development programs to reduce their usage in gas turbine engines. This paper describes several programs which provided significant results in reducing raw material requirements, that have been reduced to practice. The programs include forging and casting complex parts to near net shape, recycling of machining scrap and used parts, repair and refurbishment of damaged or worn parts, and component retirement for cause. In addition to reduction of strategic material usage, these programs have resulted in lower cost parts due to reduced material input requirements and less machining. (Author), This article is from the Proceedings of the Meeting of the Structures and Materials Panel (57th) Held at Vimeiro, Portugal on 14-19 Oct 83, AD-A148 598, p10-1 - 10-8.