Port geometry and its influence on vitrectomy

Charles Deboer, Sophia Y Fang, Luiz H. Lima, Matt McCormick, Prashant Bhadri, Ralph Kerns, Mark Humayun

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

PURPOSE: To determine the influence of port geometry on water and vitreous flow rates and test novel vitreous cutter tips in specific surgical situations. METHODS: Custom 20-gauge and 25-gauge vitreous cutter tips with different sized ports were evaluated through porcine vitreous and water flow rates. Five cutter tips were designed and fabricated for specific surgical functionalities. Tips were compared with a normal control tip and evaluated by water and porcine vitreous flow rates, vacuum level required to cut porcine retina, time required to cut and aspirate a porcine lens, and surgical evaluation in enucleated porcine eyes. RESULTS: Both vitreous and water flow asymptotically approached a maximum flow as the port diameter increased. Some tips removed water faster than the normal control tip, but none removed vitreous or lens faster. Several tips required higher vacuum levels to cut retina than the normal tip. CONCLUSIONS: Increasing the port diameter of a vitreous cutter to increase flow becomes less effective as the port becomes larger. Furthermore, modifying the port geometry of a vitreous cutter affects its surgical interactions with tissue. In the future, combinational instruments or surgery specific instruments may allow the surgeon to use an optimal port for a specific surgical task.

Original languageEnglish (US)
Pages (from-to)1061-1067
Number of pages7
JournalRetina
Volume28
Issue number8
DOIs
StatePublished - Sep 2008
Externally publishedYes

Fingerprint

Vitrectomy
Swine
Water
Vacuum
Lenses
Retina

Keywords

  • Flow
  • Instrumentation
  • Port
  • Retina
  • Surgery
  • Vitrectomy
  • Vitreoretinal surgery
  • Vitreous
  • Vitreous body

ASJC Scopus subject areas

  • Ophthalmology
  • Medicine(all)

Cite this

Deboer, C., Fang, S. Y., Lima, L. H., McCormick, M., Bhadri, P., Kerns, R., & Humayun, M. (2008). Port geometry and its influence on vitrectomy. Retina, 28(8), 1061-1067. https://doi.org/10.1097/IAE.0b013e3181840b64

Port geometry and its influence on vitrectomy. / Deboer, Charles; Fang, Sophia Y; Lima, Luiz H.; McCormick, Matt; Bhadri, Prashant; Kerns, Ralph; Humayun, Mark.

In: Retina, Vol. 28, No. 8, 09.2008, p. 1061-1067.

Research output: Contribution to journalArticle

Deboer, C, Fang, SY, Lima, LH, McCormick, M, Bhadri, P, Kerns, R & Humayun, M 2008, 'Port geometry and its influence on vitrectomy', Retina, vol. 28, no. 8, pp. 1061-1067. https://doi.org/10.1097/IAE.0b013e3181840b64
Deboer C, Fang SY, Lima LH, McCormick M, Bhadri P, Kerns R et al. Port geometry and its influence on vitrectomy. Retina. 2008 Sep;28(8):1061-1067. https://doi.org/10.1097/IAE.0b013e3181840b64
Deboer, Charles ; Fang, Sophia Y ; Lima, Luiz H. ; McCormick, Matt ; Bhadri, Prashant ; Kerns, Ralph ; Humayun, Mark. / Port geometry and its influence on vitrectomy. In: Retina. 2008 ; Vol. 28, No. 8. pp. 1061-1067.
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