March 2012
Volume 53, Issue 14
Free
ARVO Annual Meeting Abstract  |   March 2012
Vitrectomy Probes and Soft-tip Cannulas Vacuum Forces Comparison
Author Affiliations & Notes
  • Leonardo M. Machado
    Ophthalmology, Federal University of Sao Paulo, São Paulo, Brazil
  • Octaviano Magalhães, Jr.
    Ophthalmology, Federal University of Sao Paulo, São Paulo, Brazil
  • Maurício Maia
    Ophthalmology, Federal University of Sao Paulo, São Paulo, Brazil
  • Michel E. Farah
    Ophthalmology, Federal University of Sao Paulo, São Paulo, Brazil
  • Kamal A. Ismail
    Mechanical Engineering, State University of Campinas, São Paulo, Brazil
  • Footnotes
    Commercial Relationships  Leonardo M. Machado, None; Octaviano Magalhães, Jr., None; Maurício Maia, None; Michel E. Farah, None; Kamal A. Ismail, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science March 2012, Vol.53, 2597. doi:https://doi.org/
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      Leonardo M. Machado, Octaviano Magalhães, Jr., Maurício Maia, Michel E. Farah, Kamal A. Ismail; Vitrectomy Probes and Soft-tip Cannulas Vacuum Forces Comparison. Invest. Ophthalmol. Vis. Sci. 2012;53(14):2597. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To evaluate and compare the sucction force of 20-, 23- and 25-gauge vitrectomy probes and soft-tip cannulas.

Methods: : The present study was executed in an experimental laboratory setting. Each of the instruments (Alcon, Ft. Worth, TX) was connected to a vaccum pump at one side and their tips faced a small weight above a precision scale. The vaccum pressure was raised until the weight was lifted. This was repeated for several weights of growing values. The results were noted and plotted in graphs.

Results: : Each of the instruments was tested for five times. Vaccum levels ranged from 0 to 600 mmHg. 20-gauge instruments showed higher results, in average, compared to the 23- and 25-gauge ones.

Conclusions: : Both 23- and 25- gauge cannulas showed smaller lifting forces, compared to 20-gauge system, owing to their smaller tips diameter (smaller sucction area). This should be useful for retinal surgeons on occasions in which these instruments are used to lift solid objects (like the posterior hyaloid and blood clots).

Keywords: vitreoretinal surgery • vitreous 
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