Use of rotational sutures for limited retinal translocation: a new technique for superior limited macular translocation.
OBJECTIVE
To report a modified surgical technique for retinal translocation in eyes with subfoveal choroidal neovascularization.


METHODS
Experimental animal study.


METHODS
Nine pigmented rabbits were used consecutively to apply this technique. Placement of inferotemporal scleral imbrication sutures was followed by vitrectomy with posterior hyaloid separation. Balanced saline solution (BSS) was injected subretinally with a 30G needle or with a 39G hydrodissection cannula and viscous fluid injector to detach one retinal quadrant. Under low intraocular pressure, the imbrication sutures were tied, the sclerotomy sites were closed, and intravitreal air tamponade was injected. Rotation sutures were passed and the eye globe was rotated approximately 90 degrees counterclockwise. The rotation sutures were removed after 24 hours. Retinal photographs were taken and fundus examination was performed on postoperative days 1, 2 and 7. The animals were sacrificed after 7 to 10 days for postmortem macroscopic examination.


RESULTS
The entire procedure was performed in nine eyes of nine rabbits. In eight eyes, translocation could be seen on the first postoperative day after removal of the rotation sutures. The average amount of translocation was 667 microm (range: 500-800 microm) in a nasal to inferonasal direction. Vitreous hemorrhage occurred at the end of surgery in one eye due to hypotony. Iatrogenic small retinal breaks occurred in 2 eyes but did not prevent completion of the procedure. There was only a temporary hyperemia of the eyelids and conjunctiva.


CONCLUSIONS
Limited retinal translocation using rotational sutures provided a predictable amount of translocation in the planned direction. This technique is expected to be useful for superior macular translocation in humans.
Güven
Dylek
D
Doheny Retina Institute, Doheny Eye Institute, Keck School of Medicine of the University of Southern California, 1450 San Pablo Street, Los Angeles, CA 90033, USA. dkguven@hotmail.com
Panzan
Carla Q
CQ
Humayun
Mark S
MS
De Juan
Eugene
E
D000818:Animals; D020256:Choroidal Neovascularization / Q000601:surgery*; D004195:Disease Models, Animal; D007429:Intraocular Pressure; D009757:Nylons; D011817:Rabbits; D012160:Retina / Q000637:transplantation*; D013536:Suture Techniques; D013537:Sutures; D016378:Tissue Transplantation / Q000379:methods; D014182:Transplantation, Autologous; D014821:Vitrectomy
D009757:Nylons