By Robert Machemer M.D. (auth.), George W. Blankenship, Susanne Binder, Michel Gonvers, Mario Stirpe (eds.)
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Extra info for Basic and Advanced Vitreous Surgery
Basic and advanced vitreous surgery G. W. Blankenship, M. Stirpe, M. Gonvers, S. ) Fidia Research Series, vol. 11, Liviana Press, Padova © 1986 Section 11 Preoperative evaluation and patient preparation PRE-VITRECTOMV ASSESSMENT BV ULTRASOUND Pier Enrico Gallenga and Antonio Rossi * Istituto di Oftalmologia, Universita G. D'Annunzio, Chieti. *Clinica Oculistica, Universita di Ferrara The first extensive monograph on vitreous body B-scan echography was presented by G. Bellone at the 1968 International Symposium on Ultrasound in Ophthalmology, organized in Turin by Professor Riccardo Gallenga.
Am Acad Ophthalmol Otolaryngol 75:813-820. 2. Pare! J-M, Crock GW, O'Brien B, Henderson PN, Galbraight JEK and Pericic L. (1970): Prototypal Electromicrosurgical Instruments. Med J Austr 1-709. 3. Pare! J-M, Machemer Rand Aumayr W (1974): A new concept for Vitreous Surgery, 5: An Automated Microscope. Am J Ophthalmol 77-161. 4. Pare! J-M, Machemer R, O'Grady G, Crock GW and Nose I (1983): Intraocular diathermy Coagulation. Von Graefes Arch. 221:31-34. 5. Fleishman JA, Swartz M and Dixon JA (1982): Argon Laser Endophotocoagulation.
Figure 3. Silicone-air exchange. trolled with a Schiotz or Perkins tonometer. When silicone oil appears around the needie, the exchange may be considered accomplished. However, some air may remain at the highest level; in this case it is advisable to open the temporal suture and let the air flow out. The same procedure may be used if one of the two paths is partially obstructed with vitreous. ittle adjustment of the volume of the oil. DIRECT LIQUID-OlL EXCHANGE For this kind of exchange we need a particular two-port needle that can aspirate at the end and inject silicone oillaterally in the desired direction.