SMT. NHL Medical College, Ahmedabad, India.
Narang Eye Care & Laser Centre, Ahmedabad, India.
Eur J Ophthalmol. 2023 Sep;33(5):2042-2046. doi: 10.1177/11206721231165452. Epub 2023 Mar 20.
To describe Reverse four-throw (RFT) technique for pupilloplasty.
The technique involves making a single pass through the anterior chamber that helps achieve a posteriorly directed suture knot. A single arm 9-0 polypropylene suture attached to long arm needle engages the iris defects with the tip of the needle piercing the iris tissue from the posterior surface and emerging from the anterior aspect. The suture end is passed from the loop with four throws taken consecutively in the same direction that create a self-sealing and self-retaining lock like single-pass four-throw technique but with the difference that the knot slides on the posterior surface of the iris tissue.
The technique was performed in 9 eyes and the suture-loop easily slided along the posterior surface of iris tissue. The iris defect was well approximated in all the cases and the suture knot or suture tail was not visible in the anterior chamber. Anterior segment optical coherence tomography depicted smooth iris configuration with no suture extrusion in the anterior chamber.
The RFT technique provides an effective measure to seal the iris defect with the absence of knot in AC.
描述用于瞳孔成形术的反向四缝线（RFT）技术。
该技术涉及在前房内进行单次穿刺，有助于实现朝向后方的缝线结。单根 9-0 聚丙烯缝线连接到长柄针，将虹膜缺损与针尖相连，针尖从后表面刺穿虹膜组织并从前表面穿出。缝线末端从前部环穿过，连续进行四次相同方向的投掷，形成类似于单结四缝线技术的自密封和自保持锁，但不同之处在于结在虹膜组织的后表面上滑动。
该技术在 9 只眼中进行，缝线环很容易沿虹膜组织的后表面滑动。所有病例中虹膜缺损均得到良好的接近，在前房内看不到缝线结或缝线尾。前节光学相干断层扫描显示虹膜形态平滑，在前房内无缝线突出。
RFT 技术提供了一种有效的方法来密封虹膜缺损，在前房中没有结。
