A flexible infusion micro-cannula for subretinal surgery

Anat Loewenstein, R. Scott Rader, Terry H. Shelley, Eugene De Juan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Injection of fluids or drugs into the subretinal space is often necessary during subretinal surgery. The authors have developed a flexible micro-cannula for sub-retinal surgery that can be used for submacular injection of drugs or for atraumatic hydrodissection of the retina. The novel features of the soft tip include reduced diameter (200 μm), increased length, and material selection for resistance to tip buckling. The authors have used this cannula following pars plana vitrectomy for 14 patients with subfoveal choroidal neovascularization secondary to age-related macular degeneration (13 patients) and angioid streaks (1 patient). The cannula creates a relatively atraumatic retinotomy and allows an efficient, controlled injection of subretinal fluid. This micro-cannula seems to be a valuable tool for the subretinal infusion of fluids or drugs.

Original languageEnglish
Pages (from-to)774-775
Number of pages2
JournalOphthalmic Surgery and Lasers
Issue number9
StatePublished - Sep 1997
Externally publishedYes


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