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Original article
A novel technique of tangential, circumferential, scleral tunnel in 20-gauge transconjunctival sutureless vitrectomy: optical coherence tomography-aided analysis of wound integrity and clinical outcome
  1. Muhammad Amer Awan1,
  2. Douglas A M Lyall1,
  3. Zachariah R Koshy2
  1. 1Tennent Institute of Ophthalmology, Gartnavel General Hospital, Glasgow, UK
  2. 2Department of Ophthalmology, Ayr Hospital, Ayr, UK
  1. Correspondence to Zachariah R Koshy, Department of Ophthalmology, Ayr Hospital, Ayr KA6 6DX, UK; zkoshy{at}


Aim To describe a novel technique of sclerotomy construction to facilitate 20-gauge transconjunctical sutureless vitrectomy (TSV) along with the evaluation of the wound integrity.

Methods The surgical technique is described. One hundred consecutive patients who underwent TSV were evaluated for wound leaks, postoperative hypotony, endophthalmitis and any other complication related to surgery. The sclerotomies of eight patients (24 ports) were analysed by imaging with anterior segment optical coherence tomography immediately after surgery, and on the first postoperative day and after the first postoperative month.

Results 104 eyes of 100 patients were evaluated with a mean follow-up of 9.6 months. All cases underwent surgery with standard 20-gauge instrumentation and vitrectomy techniques. Five sclerotomies were found to leak at the end of surgery, requiring a suture. Anterior segment optical coherence tomography images were obtained from eight eyes with good apposition of the tunnel noted in all the cases. Mean intraocular pressure was 18.7 mm Hg on the first postoperative day. One patient had hypotony without leak and this patient had pre-existing hypotony due to chronic panuveitis. There was no instance of postoperative endophthalmitis.

Conclusions This technique of 20-gauge TSV achieves good wound apposition with a low incidence of complications while using standard 20-gauge instrumentation and vitrectomy techniques.

  • Sutureless transconjunctival 20 gauge vitrectomy
  • retina
  • treatment surgery
  • vitreous

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  • Funding None.

  • Competing interests None.

  • Provenance and peer review Not commissioned; externally peer reviewed.