Half-bow sliding knot: Modified suture technique for scleral fixation using the corneoscleral pocket

Abstract

A modified suture technique for precise knot placement in the Hoffman corneoscleral pocket technique of scleral fixation is described. Both loops of the polypropylene suture passing from the intraocular device through the sclera and conjunctiva are retrieved from the pocket. A loop of suture is pulled through 3 suture throws made using the second suture loop, forming a half bow. Centration of the intraocular lens (IOL)-capsular bag is checked. If the suture tension is too tight, the surgeon can easily undo the knot of the half-bow knot by pulling it free and can then retie the sliding knot. When the IOL-capsular bag is centered, the suture loop is cut and the free end removed. The second suture end is retrieved from the pocket, and knot tying is completed without further adjustment to the tension. Posterior pressure on the intraocular device centers it and settles the knot within the sclera at the fixation point.

Combination of capsular tension ring and capsular tension segment for the management of lens coloboma >4 clock hours

“…To overcome this, Chee et al described a half-bow sliding knot similar to Seipser's knot which helps in easy adjustment of knot tension before final knot tying. [610] In the present series, optimal anatomic and visual outcomes were achieved in all the three eyes of isolated lens coloboma using a combination of a CTR and CTS and all eyes achieved good cosmesis and refractive results.…”

“…Suture knots are tied after cutting one of the suture ends near the needle end and taking the suture out of the pocket and the other suture is retrieved through the pocket by which loops are made to tie a half-bow sliding knot with the other suture as described by Chee. [6] Final knots are tied after viscoelastic aspiration to make a tight knot and ensure centration of capsular bag [Fig. 1d and e].…”

Safety of an artificial iris in a phakic eye

“…The scleral side of the artificial iris was fixated to the sclera with a polypropylene (Prolene) 10-0 suture knotted in a limbal pouch following the technique described by Hoffman 10 and modified by Chee. 11 The natural iris tissue was sutured to the artificial iris following the Siepser slip-knot technique. 12 Two separate polypropylene 10-0 sutures per side were performed.…”