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Cet abstract a été assigné à session OB Free papers 2 - Surgical retina

Titre

Novel developments to increase surgical safety during (phaco)vitrectomy.

But	During (phaco)vitrectomy, the surgeon can encounter several complications: posterior capsule aspiration during lens surgery, retinal aspiration in the vitrectomy during vitreous base shaving and intra-operative hypotony (leading to eye collaps and even subchoroidal haemorrhage) or hypertony (compromising the retinal perfusion).
Méthodes	Software- and hardware attenuations were developed on the DORC Dual Associate to help the surgeon to address or avoid these difficulties.
Résultats	Using the venturi system with a vacuum sensor during lens aspiration and a threshold vacuum setting, a high vacuum during tip occlusion is obtained to ease the lens removal while an automated reduced vacuum is programmed without tip occlusion to avoid posterior lens capsule aspiration. -A constant fluid flow is the key factor to avoid inadvertent retinal aspiration when the vitrectome opening is moved in and out the remaining peripheral vitreous during vitreous base shaving. This is obtained using a persistalic pump system with automated vacuum adaptation. -The intra-ocular pressure during vitrectomy is determined by two components: the inflow of fluid through the infusion line and the amount of fluid removed from the eye, in its turn dependent on the amount of vacuum used and the size of the used vitrectome. By developing a feedback system between the aspiration rate (vitrectome) and infusion rate (air-driven infusion line), a highly stable intra-ocular pressure is obtained, regardless of the amount or speed of fluid aspirated from the eye.
Conclusion	The newly developed hardware and software provides a markedly improved safety during vitrectomy, by avoiding surgical damage to the eye.

Auteur 1

Nom	STALMANS
Initiales	P
Institut	Dept. Ophthalmology UZLeuven
Ville	Leuven