SFT: Are You In The Loop?
Single-pass four throw (SFT) and pinhole pupilloplasty is set to become the new standard of care in pupil reconstruction
Amar Agarwal, Priya Narang | | Longer Read
At a Glance
- SFT is an alternative method of pupilloplasty, requiring the surgeon to pass the suture end through the loop four times
- Compared with current pupilloplasty methods, it offers faster visual recovery and reduced postoperative inflammation
- Reconstructing the pupil this way prevents patients from glare, photophobia and untoward images formed due to reflection of light
- PPP with SFT is suitable for patients with a range of visual disorders – from high astigmatism and corneal injuries to post-penetrating keratoplasty.
Single-pass four throw (SFT) pupilloplasty is a relatively new surgical technique (1). It was initially described as a modification of the Siepser’s method, but the knot formation has been found to belong to the Timber Hitch method of tying. In this technique, a 10-0 or a 9-0 polypropylene suture attached to a long arm needle is passed through the proximal iris tissue that is to be involved in the pupil reconstruction. A 26 G needle is introduced from the paracentesis in the opposite direction, where it engages the distal iris tissue to be approximated (Figure 1 A). The 10-0 needle is then passed in to the barrel of the 26 G needle, before it is withdrawn from the eye. A Sinskey’s hook withdraws the loop of the suture (Figure 1 B) and the suture end is passed from the loop four times, thereby taking four throws (Figure 1 C). Both the suture ends are pulled, and the loop slides inside the eye, thereby approximating the pupillary edges together (Figure 1 D). A micro-scissor is introduced inside the eye and the suture ends are cut. The helical structure created due to the loop approximation forms a self-locking and a self-retaining knot inside the eye.
Enjoy our FREE content!
Log in or register to read this article in full and gain access to The Ophthalmologist’s entire content archive. It’s FREE and always will be!
Login if you already created an account
Or register now - it’s free and always will be!
You will benefit from:
- Unlimited access to ALL articles
- News, interviews & opinions from leading industry experts
- Receive print (and PDF) copies of The Ophthalmologist magazine