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New Mercury Vacuum Pump and System of Slowly Applied Vacuum for Phakoerisis

New Mercury Vacuum Pump and System of Slowly Applied Vacuum for Phakoerisis Abstract The suction method for intracapsular cataract extraction is nowadays far less popular than the forceps method. However, a comparative study of the grasping mechanism with forceps and with the vacuum cup clearly demonstrates the superiority of the latter. In fact, the forceps "pinches" a small piece of the delicate capsule, from which the lens will hang loosely. As Thomas1 has stated: "The entire weight of the lens and its attachments are suspended from a relatively small area." The mechanism of the grasp with a vacuum cup is quite different. When atmospheric pressure between the cup and the lens drops, the air pushes the lens against the cup, to which it adheres. Dimitry2 has expressed this in terms physically exact when stating, "The atmospheric pressure, seeking to balance the vacuum, forces the lens into the cup." The advantages of this grasp are the following: 1. There is no pinching References 1. References 5 and 6. 2. References 5 and 6. 3. Thomas, C.: Cataract Extraction by the Suction Method , Arch. Ophth. 39:805, 1948.Crossref 4. Dimitry, T. J.: Evolution of a Sucking Disk for Intracapsular Extraction of Cataract , Arch. Ophth. 21:261, 1939.Crossref 5. Castroviejo, R.: Theoretical and Practical Study of the Intracapsular Cataract Operation , Am. J. Ophth. 15:406, 1932. 6. Moreu, A.: Notas relativas a la extracción intracapsular del cristalino , in Estudios e informaciones oftalmológicas , Instituto Barraquer, 1949, Vol. 1, No. 14. 7. Barraquer, I.: Sur la Phakoérisis , Ann. ocul. 157:702, 1920. 8. Barraquer, I.: Intracapsular Method of Cataract Extraction , Brit. M. J. 2:660, 1924. 9. Dimitry, T. J.: A Vacuum Grasping Instrument for Removal of Cataract in Capsule , Arch. Ophth. 9:261, 1933.Crossref 10. Perez Llorca, J.: Simplicación del procedimiento del vacío para la extracción de la catarata senil , Arch. Soc. oftal. hispano-am. 7:384, 1947. 11. Bell, A.: A Modified Erisophake , Am. J. Ophth. 31:610, 1948. 12. Harrington, D.: A New and Simplified Erisophake , Am. J. Ophth. 34:435, 1951. 13. Marbaix: Réflexions sur trois cas d'extraction de la cataracte dans sa capsule par la ventouse de Barraquer sans vide vibratoire , Ann. ocul. 158:801, 1921. 14. Falcão, P.: Technique of Cataract Operation with the Oral Suction Cupping Apparatus , Am. J. Ophth. 30:1428, 1947. 15. Muñoz Urra, F.: Un Moyen simple pour la production du vide nécessaire pour l'extraction de la cataracte "in toto" selon la méthode de Barraquer (phacoérisis) , Ann. ocul. 158:809, 1921. 16. Hulen, V. H.: Vacuum Fixation of the Lens and Flap Suture in the Extraction of a Cataract in Its Capsule , J. A. M. A. 57:188, 1911.Crossref 17. Lagrange, H.: L'extraction pneumatique du cristallin par rupture zonulaire , Ann. ocul. 174: 387, 1937. 18. O'Reilly, G., and Grant, G.: La Extracción neumática de la catarata , Arch. chilen. oftal. 10: 125, 1953. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png A.M.A. Archives of Ophthalmology American Medical Association

New Mercury Vacuum Pump and System of Slowly Applied Vacuum for Phakoerisis

VILLASECA, ALFREDO
A.M.A. Archives of Ophthalmology , Volume 55 (1) – Jan 1, 1956
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References (17)

Publisher
American Medical Association
Copyright
Copyright © 1956 American Medical Association. All Rights Reserved.
ISSN
0096-6339
DOI
10.1001/archopht.1956.00930030011003
Publisher site
See Article on Publisher Site

Abstract

Abstract The suction method for intracapsular cataract extraction is nowadays far less popular than the forceps method. However, a comparative study of the grasping mechanism with forceps and with the vacuum cup clearly demonstrates the superiority of the latter. In fact, the forceps "pinches" a small piece of the delicate capsule, from which the lens will hang loosely. As Thomas1 has stated: "The entire weight of the lens and its attachments are suspended from a relatively small area." The mechanism of the grasp with a vacuum cup is quite different. When atmospheric pressure between the cup and the lens drops, the air pushes the lens against the cup, to which it adheres. Dimitry2 has expressed this in terms physically exact when stating, "The atmospheric pressure, seeking to balance the vacuum, forces the lens into the cup." The advantages of this grasp are the following: 1. There is no pinching References 1. References 5 and 6. 2. References 5 and 6. 3. Thomas, C.: Cataract Extraction by the Suction Method , Arch. Ophth. 39:805, 1948.Crossref 4. Dimitry, T. J.: Evolution of a Sucking Disk for Intracapsular Extraction of Cataract , Arch. Ophth. 21:261, 1939.Crossref 5. Castroviejo, R.: Theoretical and Practical Study of the Intracapsular Cataract Operation , Am. J. Ophth. 15:406, 1932. 6. Moreu, A.: Notas relativas a la extracción intracapsular del cristalino , in Estudios e informaciones oftalmológicas , Instituto Barraquer, 1949, Vol. 1, No. 14. 7. Barraquer, I.: Sur la Phakoérisis , Ann. ocul. 157:702, 1920. 8. Barraquer, I.: Intracapsular Method of Cataract Extraction , Brit. M. J. 2:660, 1924. 9. Dimitry, T. J.: A Vacuum Grasping Instrument for Removal of Cataract in Capsule , Arch. Ophth. 9:261, 1933.Crossref 10. Perez Llorca, J.: Simplicación del procedimiento del vacío para la extracción de la catarata senil , Arch. Soc. oftal. hispano-am. 7:384, 1947. 11. Bell, A.: A Modified Erisophake , Am. J. Ophth. 31:610, 1948. 12. Harrington, D.: A New and Simplified Erisophake , Am. J. Ophth. 34:435, 1951. 13. Marbaix: Réflexions sur trois cas d'extraction de la cataracte dans sa capsule par la ventouse de Barraquer sans vide vibratoire , Ann. ocul. 158:801, 1921. 14. Falcão, P.: Technique of Cataract Operation with the Oral Suction Cupping Apparatus , Am. J. Ophth. 30:1428, 1947. 15. Muñoz Urra, F.: Un Moyen simple pour la production du vide nécessaire pour l'extraction de la cataracte "in toto" selon la méthode de Barraquer (phacoérisis) , Ann. ocul. 158:809, 1921. 16. Hulen, V. H.: Vacuum Fixation of the Lens and Flap Suture in the Extraction of a Cataract in Its Capsule , J. A. M. A. 57:188, 1911.Crossref 17. Lagrange, H.: L'extraction pneumatique du cristallin par rupture zonulaire , Ann. ocul. 174: 387, 1937. 18. O'Reilly, G., and Grant, G.: La Extracción neumática de la catarata , Arch. chilen. oftal. 10: 125, 1953.

Journal

A.M.A. Archives of Ophthalmology – American Medical Association

Published: Jan 1, 1956

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