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Erschienen in: Graefe's Archive for Clinical and Experimental Ophthalmology 2/2021

18.08.2020 | Basic Science

Novel probabilistic model of core vitreous traction using microsurgical vitrectomy tools

verfasst von: Jawchyng L. Lue, Ramiro Ribeiro, Michael J. Koss, Paulo Falabella, Rodrigo Brant, Mark S. Humayun

Erschienen in: Graefe's Archive for Clinical and Experimental Ophthalmology | Ausgabe 2/2021

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Abstract

Purpose

Traction exerted on the vitreous base during vitrectomy poses a risk for retinal tears. We aimed to quantify core vitreous traction during vitrectomy using spring return and pneumatic cutters.

Methods

Juvenile porcine vitreous was vacuum held in a vitreous bath while traction was measured using precision force gauge during vitrectomy. The parameters included were aspiration rate, cut-rate, cutter size, and machine types.

Results

An empirical probabilistic model was developed. The traction was proportional to the aspiration rate but insignificantly dependent on the cut-rate. The traction probability was inversely proportional to the exponential function of the traction (p < 0.05). The traction was < 0.003 N for 99% of the time using either 23- or 25-gauge cutters.

Conclusion

The tractions measured were considered similar to the causative forces of an iatrogenic retinal tear during a pars plana vitrectomy. The results provide a safety reference matrix of instrumental parameters during vitrectomy.
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Metadaten
Titel
Novel probabilistic model of core vitreous traction using microsurgical vitrectomy tools
verfasst von
Jawchyng L. Lue
Ramiro Ribeiro
Michael J. Koss
Paulo Falabella
Rodrigo Brant
Mark S. Humayun
Publikationsdatum
18.08.2020
Verlag
Springer Berlin Heidelberg
Erschienen in
Graefe's Archive for Clinical and Experimental Ophthalmology / Ausgabe 2/2021
Print ISSN: 0721-832X
Elektronische ISSN: 1435-702X
DOI
https://doi.org/10.1007/s00417-020-04836-z

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