Subscleral Trabeculectomy With Inverted T-Shaped Deep Sclerectomy for Primary Congenital Glaucoma (TDS-PCG)
Safety and Efficacy of Subscleral Trabeculectomy Combined With an Inverted T-Shaped Deep Sclerectomy for the Treatment of Primary Congenital Glaucoma
Primary congenital glaucoma (PCG) is a vision-threatening disorder of childhood characterized by elevated intraocular pressure (IOP) resulting from developmental abnormalities of the anterior chamber angle. Early surgical intervention is the standard treatment to preserve visual function and prevent progressive optic nerve damage.
This retrospective interventional case series evaluated the safety and efficacy of subscleral trabeculectomy combined with an inverted T-shaped deep sclerectomy (El-Habbak modification) in children with PCG. Medical records of patients who underwent surgery between January 2022 and June 2025 at Benha University Hospital were reviewed. The primary outcome was reduction in intraocular pressure. Secondary outcomes included surgical success rates, reduction in antiglaucoma medication use, changes in corneal clarity and optic nerve status, postoperative complications, and the need for additional glaucoma surgery following a minimum follow-up of 12 months.
Panoramica dello studio
Stato
Intervento / Trattamento
Descrizione dettagliata
Primary congenital glaucoma (PCG) is a rare developmental glaucoma caused by trabeculodysgenesis, leading to impaired aqueous humor outflow, elevated intraocular pressure (IOP), corneal enlargement and edema, optic nerve damage, and irreversible visual loss if untreated. Surgical management remains the primary treatment because medical therapy alone is generally insufficient for long-term IOP control.
Trabeculectomy is an established filtration procedure for pediatric glaucoma; however, its long-term success may be limited by aggressive postoperative wound healing and subconjunctival fibrosis. Deep sclerectomy and other non-penetrating glaucoma procedures were developed to improve aqueous drainage while reducing complications associated with conventional penetrating filtration surgery.
This study evaluated a modified surgical technique consisting of subscleral trabeculectomy combined with an inverted T-shaped deep sclerectomy (El-Habbak modification). The modification involves creating a vertical deep scleral channel directed toward the limbus together with a posterior horizontal extension, forming an enlarged intrascleral filtration reservoir intended to facilitate aqueous humor drainage while maintaining controlled filtration.
This was a retrospective interventional case series conducted at the Department of Ophthalmology, Faculty of Medicine, Benha University, Egypt. Medical records of children with primary congenital glaucoma who underwent this surgical procedure between January 2022 and June 2025 and completed at least 12 months of postoperative follow-up were reviewed.
The primary objective was to evaluate postoperative reduction in intraocular pressure. Secondary objectives included assessment of complete and qualified surgical success, reduction in the number of antiglaucoma medications, improvement in corneal clarity, changes in cup-to-disc ratio, postoperative complications, and the need for additional glaucoma surgery.
The study was performed in accordance with the Declaration of Helsinki and received approval from the Institutional Review Board of the Faculty of Medicine, Benha University. All data were analyzed retrospectively after completion of patient follow-up.
Tipo di studio
Iscrizione (Effettivo)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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Benha
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Banhā, Benha, Egitto, 13111
- Benha University
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
- Bambino
Accetta volontari sani
Descrizione
Inclusion Criteria:
- Diagnosis of primary congenital glaucoma.
- Age 3 years or younger at the time of diagnosis.
- Underwent subscleral trabeculectomy combined with an inverted T-shaped deep sclerectomy (El-Habbak modification).
- Availability of complete medical records.
- Minimum postoperative follow-up of 12 months.
Exclusion Criteria:
- Secondary childhood glaucomas.
- Associated ocular anomalies.
- Previous glaucoma surgery.
- Incomplete clinical records.
- Postoperative follow-up of less than 12 months.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: N / A
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: Subscleral Trabeculectomy With Inverted T-Shaped Deep Sclerectomy
All participants underwent subscleral trabeculectomy combined with an inverted T-shaped deep sclerectomy (El-Habbak modification) for the treatment of primary congenital glaucoma.
Surgical outcomes were assessed retrospectively after a minimum postoperative follow-up of 12 months.
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Subscleral trabeculectomy was performed beneath a superficial scleral flap, followed by creation of an inverted T-shaped deep sclerectomy (El-Habbak modification).
The modification consisted of a vertical deep scleral channel extending toward the limbus and a posterior horizontal extension to create an enlarged intrascleral filtration reservoir.
Peripheral iridectomy was then performed, and the scleral flap and conjunctiva were closed in the standard fashion.
The procedure was intended to enhance aqueous humor outflow while maintaining controlled filtration and reducing postoperative fibrosis.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Change in Intraocular Pressure (IOP)
Lasso di tempo: Baseline and 12 months
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Mean change in intraocular pressure (mmHg), measured by applanation tonometry or under anesthesia when necessary, from baseline to 12 months after subscleral trabeculectomy combined with an inverted T-shaped deep sclerectomy.
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Baseline and 12 months
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Complete Surgical Success Rate
Lasso di tempo: Baseline to12 months
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Proportion of eyes achieving an intraocular pressure between 6 and 21 mmHg with at least a 30% reduction from baseline without antiglaucoma medications.
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Baseline to12 months
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Collaboratori e investigatori
Sponsor
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- PCG-TDS-2022
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