AIM: To observe the treatment effect and discuss availability of spherical retinal detachment by 23G intra-infusion-assisted scleral buckling.

METHODS: Twenty-one eyes were randomly selected from in-patients with rhegmatogenous retinal detachment with much subretinal fluid and spherical appearance between February 2017 and February 2018, which were suitable for scleral buckling. The 23G intra-infusion was placed in the pars plana of ciliary body before the surgery. Retinal hole was not solidified during operation. Laser photocoagulation was performed around the retinal hole after surgery. Retinal reattachment state and the complications were evaluated by 3 to 10mo follow up.

RESULTS: All patients have undergone operations smoothly. Subretinal fluid was drainage, chroidal bleeding and retinal incarceration did not appear during the operation. Eighteen eyes achieved retinal reattachment on the first postoperative day; Subretinal fluid of two eyes was asorbed fully; One eyes achieved retinal reattachment after the adjustment by the external pressure block. One eyes with recurrence achieved retinal reattachment after vitreoretinal surgery. One eye developed complication with subretinal hemorrhage and the range of bleeding was less than 1PD, which was absorbed after 3mo. There were no eyes found abnormal intraocular pressure, anterior segment ischemia or other sever complications.

CONCLUSION: The 23G intra-infusion was pre-placed before relieving fluid in the scleral buckling of retinal detachment, which can effective keep intraocular pressure stably and reduce the possibilities of explosive suprachoroidal hemorrhage and postoperative choroidal amotio triggered by fast decrease of intraocular pressure. The retina is flat basically and the hole location is relatively accurate, which improve the success of the surgery.