Vitreous Procedures (1820)    NLM VALUE SETS (802.2)

Aspiration of vitreous with replacement (procedure)

Injection of vitreous substitute, pars plana approach (procedure)

Injection of perfluorocarbon liquid into vitreous (procedure)

Anterior sclerotomy with removal of vitreous (procedure)

Removal of vitreous, anterior approach (open sky technique or limbal incision); 
partial removal

Vitrectomy, mechanical, pars plana approach; with removal of internal limiting 
membrane of retina (eg, for repair of macular hole, diabetic macular edema), 
includes, if performed, intraocular tamponade (ie, air, gas or silicone 
oil)

Vitrectomy, mechanical, pars plana approach; with removal of subretinal 
membrane (eg, choroidal neovascularization), includes, if performed, intraocular 
tamponade (ie, air, gas or silicone oil) and laser photocoagulation

Removal of vitreous, anterior approach (open sky technique or limbal incision); 
subtotal removal with mechanical vitrectomy

Aspiration or release of vitreous, subretinal or choroidal fluid, pars 
plana approach (posterior sclerotomy)

Injection of vitreous substitute, pars plana or limbal approach (fluid-gas 
exchange), with or without aspiration (separate procedure)

Discission of vitreous strands (without removal), pars plana approach

Severing of vitreous strands, vitreous face adhesions, sheets, membranes 
or opacities, laser surgery (1 or more stages)

Vitrectomy, mechanical, pars plana approach

Vitrectomy, mechanical, pars plana approach; with focal endolaser photocoagulation

Vitrectomy, mechanical, pars plana approach; with removal of preretinal 
cellular membrane (eg, macular pucker)