1. Novel probabilistic model of core vitreous traction using microsurgical vitrectomy tools.
- Author
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Lue JL, Ribeiro R, Koss MJ, Falabella P, Brant R, and Humayun MS
- Subjects
- Animals, Humans, Microsurgery, Models, Statistical, Swine, Traction, Vitrectomy, Vitreous Body surgery
- 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.
- Published
- 2021
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