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Updated: Sep 2, 2025

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Published on: January 26, 2018
Illuminated Microcatheter Passage Assisted Circumferential Trabeculotomy and Trabeculectomy (IMPACTT): An improved
1Jasti V Ramanamma Children's Eye Care Centre, Hyderabad, India.
Insights
A novel surgical technique, illuminated microcatheter passage assisted circumferential trabeculotomy and trabeculectomy (IMPACTT), shows promise for treating advanced primary congenital glaucoma (PCG). This improved procedure offers a safe and effective option for managing this serious pediatric eye condition.
Area of Science:
- Ophthalmology
- Pediatric Surgery
- Glaucoma Research
Background:
- Primary congenital glaucoma (PCG) is a severe pediatric eye condition requiring timely and effective surgical intervention.
- Advanced stages of PCG present significant challenges in intraocular pressure (IOP) management and visual outcome.
Observation:
- A case report details the surgical management of an infant diagnosed with advanced bilateral PCG.
- The patient presented with elevated IOP (36 mmHg) and corneal enlargement (13.5 mm diameter) in both eyes.
- The surgical procedure involved illuminated microcatheter passage assisted circumferential trabeculotomy and trabeculectomy (IMPACTT) performed in a single session.
Findings:
- Postoperative IOP significantly reduced to 12 mmHg and 10 mmHg in the right and left eyes, respectively.
- Corneal clarity was restored, with only residual Haab's striae observed.
- Visual acuity, assessed using Teller acuity cards, reached 4 cycles/degree binocularly.
Implications:
- IMPACTT demonstrates safety and efficacy in managing advanced PCG.
- This technique may represent an advancement in surgical procedures for pediatric glaucoma.
- Further studies are warranted to establish IMPACTT as a standard treatment for PCG.
Purpose:
To report an improved surgical procedure for primary congenital glaucoma (PCG).
Case Report:
An apparently healthy 4-month-old male child was referred by an ophthalmologist with the preliminary diagnosis of congenital glaucoma. Office examination followed by evaluation under anaesthesia confirmed the diagnosis of advanced PCG in both eyes. Horizontal corneal diameter was 13.5 mm in both eyes and intraocular pressure was 36 mmHg in both eyes. The child was operated on both eyes in the same session. An illuminated microcatheter passage assisted circumferential trabeculotomy and trabeculectomy (IMPACTT) was performed. Two months postoperatively, the IOPs were 12 and 10 mmHg in the right and left eye, respectively, and the cornea was clear except for the presence of Haab's striae in both eyes. The child's visual acuity (binocularly) was 4 cycles/degree as recorded with Teller acuity cards.
Conclusions:
Illuminated microcatheter passage assisted circumferential trabeculotomy and trabeculectomy (IMPACTT) is safe and effective and may represent an improved surgical procedure for the management of advanced PCG.
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