Pars Plana Vitrectomy Surgery (PPV)Vitreus is a transparent tissue looking like egg white and fills the eyeball giving it its shape.Vitreus fills 2/3 of the eyeball.Draining vitreus from the eyeball surgically is called pars plana vitrectomy (PPV).
For retinal detachment,diabetic retinopathy,retinopathy of prematurity,inside eye beedings,macular holes,macular membranes,endophtalmus(infection inside the eye),foreign bodies inside the eye PPV is performed.
The anatomical succes rate is high in PPV but the functionel succes rate remain lower and repeated surgeries may be required especially for diabetic,young an traumatized patients.
PPV is performed under local anesthesia and combined with a group of surgeries if necessary.
After anesthesia 3 holes trough sclera are made called sclerotomy.An infusion cannula is attached to a sclerotomy to maintain a stabil intraocular pressure.
A light probe and a vitrectomy probe are attached to the other sclerotomies.PPV requries a high technology.A precise microscope,lens and imaging systems,vitrectomy equipment,Argon Laser and an experienced surgeon.
Gas,airor silicon tamponades can be injected into the eye according to the cause of the surgery.Gas and air vanish after 1-3 weeks,visual acquity is low as long as air remains inside the eye,it begins to increase as the tamponade vanish.Patients must lie face down while gas tamponated.A silicone tamponade does not deteriorate vision but it needs to be taken out of the eye in a further operation.The patient is told to lie in a distinct head position because silicon tamponade seats according to the head position.The eye is dressed postoperatively,and postoperative controls are made.
Raise in intraocular pressure,eye bleeding,retinal detachment can be repeated after surgery,which a reoperation can be necessary.
The increase in visual acquity depends on macular-retinal damage preoperatively.The early the operation and the small the damage is the more the visual acquity increases.