Perspective on fluid and solid dynamics in different pars plana vitrectomy systems.

PURPOSE

To summarize current concepts and recent data from the literature about different vitrectomy machines and small-gauge systems based on physical laws.

DESIGN

Interpretive essay.

METHODS

Review and synthesis of selected recent literature with interpretation and perspective.

RESULTS

Pars plana vitrectomy can be performed with a wide variety of treatment strategies, for multiple diseases, and with different materials (solids and fluids). We discuss a variety of machines and system settings (peristaltic pump, duty cycle, aspiration, and infusion controls) targeting safer and the most effective surgery with detailed explanations of the physical properties.

CONCLUSIONS

Effective management of new surgical strategies is based on recognizing and addressing various physical characteristics in disease and ocular settings. Although the properties of machine are expanding, the long-term efficacy and safety of most new approaches have yet to be established in controlled clinical trials.