As the illumination equipment is expensive, surgeons tried different alternatives to replace the microcatheter. Beck first used a 6/ 0 polypropylene suture in circumferential cannulation in 360-degree trabeculotomy for primary congenital glaucoma in 1995 [39]. Later, this technique was described for the treatment of OAG patients [40,41]. After the preparation of the deep scleral flap, the ostia of SC are enlarged by using an OVD and a 6/ 0 polypropylene suture is introduced into the canal. The suture probe is blunt and slightly curved or formed in a double spiral. After circumferential catheterization, the distal tip is exposed at the other ostium and a 10/ 0 prolene suture is fastened to it. On removal, the 10/ 0 prolene suture remains in the canal secured through a slip knot or a four-throw knot. In recent prospective studies [42-44], a twisted 6/ 0 polypropylene suture was used for the cannulation of the SC (Fig. 3). The authors reported that the smooth tip of the loop ensures an atraumatic probing of the SC, while the double helix configuration provides a good rigidity to the suture. According to the authors, the success rate of circumferential cannulation by twisted 6/ 0 sutures is up to 90%, which is not inferior to the previously reported cannulation rates in conventional canaloplasty [16,45] or by the Visco360 and Omni System [46].
LCCarmody
commented
2 months ago
137760 GLAUCOMA, PRIMARY OPEN ANGLE; POAG
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9585494/
As the illumination equipment is expensive, surgeons tried different alternatives to replace the microcatheter. Beck first used a 6/ 0 polypropylene suture in circumferential cannulation in 360-degree trabeculotomy for primary congenital glaucoma in 1995 [39]. Later, this technique was described for the treatment of OAG patients [40,41]. After the preparation of the deep scleral flap, the ostia of SC are enlarged by using an OVD and a 6/ 0 polypropylene suture is introduced into the canal. The suture probe is blunt and slightly curved or formed in a double spiral. After circumferential catheterization, the distal tip is exposed at the other ostium and a 10/ 0 prolene suture is fastened to it. On removal, the 10/ 0 prolene suture remains in the canal secured through a slip knot or a four-throw knot. In recent prospective studies [42-44], a twisted 6/ 0 polypropylene suture was used for the cannulation of the SC (Fig. 3). The authors reported that the smooth tip of the loop ensures an atraumatic probing of the SC, while the double helix configuration provides a good rigidity to the suture. According to the authors, the success rate of circumferential cannulation by twisted 6/ 0 sutures is up to 90%, which is not inferior to the previously reported cannulation rates in conventional canaloplasty [16,45] or by the Visco360 and Omni System [46].