Pneumatic vitrectomy for retinal attachment

Details Pneumatic vitrectomy for retinal attachment Pneumatic vitrectomy for retinal attachment

1994-05-12

1996-08-20

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

604 22, 604 26, 604 51, 604 35, 606167, 606170, 606171, A61M 100

Patent

active

055474730

ABSTRACT:
A surgical instrument for the treatment of simple inferior or superior retinal detachments and a method of using the same. The surgical instrument has an elongated probe with an outer tube and an inner tube slideably engaged in the outer tube. Generally the instrument has a cutting edge and an aspiration port connected to a vacuum. A non-expanding gas delivery channel, having an outer diameter approximately that of a 36 gauge needle (0.13 mm) is adjacent the outer tube. The overall outer diameter of the probe is less than that of a 23 gauge needle (0.63 mm). In use the probe is inserted in the vitreous cavity through a small sclerotomy incision. The inner tube oscillates within the outer tube and vitreal material is drawn into the suction port, excised by the cutting edge, and removed by vacuum. Simultaneously, non-expanding gas is introduced through the gas channel to equalize intraocular pressure. The non-expanding gas migrates to the retinal tear and urges the retinal tissue toward the choroid forcing subretinal fluid from behind the retina through the tear. The instrument is withdrawn and the sclerotomy is self-sealing or requires one suture. The retinal tear is permanently attached by application of cryocoagulation or laser photocoagulation.

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