New iris retractor for pupil dilatation during anterior vitrectomy: double-hook iris retractor

Area of Science:

• Ophthalmology
• Surgical Instrumentation
• Retinal Surgery

Background:

• Pupillary dilatation is crucial for anterior segment visualization during ophthalmic surgery.
• Conventional iris retractors can dislodge during procedures, necessitating frequent repositioning.
• Small pupils pose a challenge, particularly during complex vitreoretinal surgeries requiring scleral indentation.

Purpose of the Study:

• To introduce and evaluate a novel double-hook iris retractor designed for enhanced stability.
• To compare the retractor's performance against conventional flexible iris retractors during anterior vitrectomy.
• To assess the impact of the new iris retractor on surgical efficiency and instrument manipulation.

Main Methods:

• A new double-hook iris retractor was designed based on conventional flexible models.
• The novel retractor was used in 16 eyes, and a conventional retractor in 14 eyes.
• Participants underwent anterior vitrectomy for conditions including proliferative retinopathy and proliferative diabetic retinopathy.

Main Results:

• The novel iris retractor was replaced a mean of 0.3 times, significantly less than the conventional retractor's mean of 4.2 times (P = 0.009).
• The double-hook design demonstrated superior stability and ease of engagement with the iris.
• The new instrument proved effective in maintaining pupillary dilatation throughout vitreous surgery.

Conclusions:

• The new double-hook iris retractor offers improved stability and reduces intraoperative manipulation compared to conventional devices.
• This innovation is particularly beneficial for anterior vitrectomy in eyes with small pupils and complex retinal conditions.
• The enhanced retractor contributes to greater surgical efficiency and potentially better patient outcomes.