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PEI-GT Trial for Initial Treatment of Primary Open-Angle Glaucoma With Cataract

7. Juli 2026 aktualisiert von: Nanfang Hospital, Southern Medical University

Efficacy and Safety of Phacoemulsification Combined With Gonioscopy-Assisted Trabeculotomy as Initial Treatment for Primary Open-Angle Glaucoma With Cataract: A Multicenter Randomized Controlled Trial

The goal of this clinical trial is to learn whether doing phacoemulsification combined with gonioscopy-assisted trabeculotomy as an initial treatment can reduce the burden of glaucoma eye drops in adults with primary open-angle glaucoma and cataract. It will also learn whether this early surgical strategy improves ocular surface health and vision-related quality of life. The main questions it aims to answer are:

Does early combined surgery reduce the need for long-term glaucoma medications? Does early combined surgery improve ocular surface health compared with cataract surgery followed by guideline-based glaucoma eye drops? Does early combined surgery improve vision-related quality of life and anxiety compared with the medication-based treatment strategy? What medical problems or complications do participants have after treatment? Researchers will compare phacoemulsification combined with gonioscopy-assisted trabeculotomy to phacoemulsification followed by guideline-based topical eye pressure-lowering medications.

Participants will:

Undergo cataract surgery with or without gonioscopy-assisted trabeculotomy Attend follow-up visits for 24 months after treatment Have eye pressure, visual acuity, OCT, AS-OCT, visual field, ocular surface, and safety examinations at scheduled visits Complete quality-of-life and anxiety questionnaires at scheduled visits Provide tear samples at selected visits for biomarker testing where applicable

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Primary open-angle glaucoma is a chronic progressive optic neuropathy in which sustained intraocular pressure control is important for delaying structural and functional progression. Long-term topical IOP-lowering medication may be limited by ocular surface disease, poor adherence, treatment cost, and cumulative ocular tissue exposure. Gonioscopy-assisted trabeculotomy is an ab interno minimally invasive glaucoma procedure that can be combined with phacoemulsification in patients with coexisting cataract. This trial will compare PEI plus GT with PEI plus conventional medications as an initial treatment strategy in treatment-naive patients with POAG and cataract. Randomization will be stratified by center and implemented through an IWRS or equivalent web-based randomization system. Outcome assessors will be masked whenever feasible. Follow-up visits are scheduled at Day 1, Day 7, Month 1, Month 3, Month 6, Month 9, Month 12, Month 18, and Month 24.

Studientyp

Interventionell

Einschreibung (Geschätzt)

106

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studieren Sie die Kontaktsicherung

Studienorte

  • China
      • Guangzhou, China
        • Rekrutierung
        • Nanfang Hospital, Southern Medical University
        • Kontakt:
      • Luzhou, China
        • Noch keine Rekrutierung
        • The Affiliated Hospital of Southwest Medical University
      • Zhengzhou, China
        • Noch keine Rekrutierung
        • The First Affiliated Hospital of Zhengzhou University
        • Kontakt:
          • Xin Yang
      • Zhuhai, China
        • Noch keine Rekrutierung
        • Zhuhai Hospital of Guangdong Provincial Hospital of Chinese Medicine
    • Ningxia
      • Ningxia, Ningxia, China
        • Noch keine Rekrutierung
        • People's Hospital of Ningxia Hui Autonomous Region

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Nein

Beschreibung

Inclusion Criteria:

  • Provides written informed consent voluntarily.
  • Age 40 to 85 years.
  • Male or female.
  • Treatment-naive for glaucoma, with no prior IOP-lowering medication, glaucoma laser procedure, or glaucoma surgery.
  • Lens opacity causing decreased visual quality and clinically significant cataract.
  • Diagnosis of POAG combined with cataract by the treating ophthalmologist.
  • Best-corrected visual acuity of 0.1 or better on the Snellen chart, corresponding to LogMAR 1.0 or less.
  • Ability and willingness to complete scheduled follow-up visits and study examinations.

Exclusion Criteria:

  • Secondary glaucoma, including uveitic, pseudoexfoliative, pigmentary, steroid-induced, neovascular, traumatic, or other secondary glaucoma.
  • Angle-closure glaucoma or narrow angle inconsistent with POAG.
  • POAG without visually significant cataract.
  • Previous anti-glaucoma medication use, glaucoma surgery, or glaucoma laser treatment.
  • Advanced visual field loss, defined as visual field mean deviation worse than -12 dB.
  • Severe ocular comorbidity or inability to perform reliable visual acuity testing.
  • Known contraindication to required study medications.
  • Average RNFL thickness or GCIPL thickness less than 54 micrometers.
  • Axial length greater than 26 mm.
  • Monocular status or functional vision in only one eye.
  • Inability to complete reliable visual field or OCT testing.
  • Systemic disease that may affect ocular status or study assessment, including diabetes mellitus, uncontrolled hypertension, malignancy, renal disease, autoimmune disease, neurological disease, liver disease, cardiovascular disease, or systemic inflammatory disease.
  • Visual impairment mainly attributable to disease other than POAG or cataract.
  • Pregnancy, lactation, or planned pregnancy during the study period.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Single

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: PEI combined with gonioscopy-assisted trabeculotomy
Participants will undergo phacoemulsification cataract extraction with intraocular lens implantation combined with approximately 120 degrees of ab interno gonioscopy-assisted trabeculotomy during the same surgical session. Postoperative care will follow the protocol, and rescue IOP-lowering medications may be added if clinically indicated.
Kombinationsprodukt: PEI combined with gonioscopy-assisted trabeculotomy
Phacoemulsification combined with Ab interno trabeculotomy performed under gonioscopic visualization for approximately 120 degrees to incise/open the trabecular meshwork and expose Schlemm canal. The cutting instrument will be non-device-dependent, such as a Tanito hook, Lanxin knife, Zeng knife, or bent 25-26G needle; KDB is not included as the cutting blade.
Aktiver Komparator: PEI combined with conventional IOP-lowering medications
Participants will undergo phacoemulsification cataract extraction with intraocular lens implantation. Postoperatively, conventional topical IOP-lowering medications will be initiated or adjusted according to guideline-based care and clinical judgment when IOP remains above target.
Kombinationsprodukt: PEI combined with conventional topical IOP-lowering medications
Phacoemulsification combined with guideline-based topical IOP-lowering therapy, generally including prostaglandin analogues unless contraindicated, with beta-blockers, carbonic anhydrase inhibitors, alpha-2 agonists, or other agents added or adjusted according to efficacy, tolerance, contraindications, and clinical judgment.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Mean change in intraocular pressure from baseline to Month 24
Zeitfenster: Baseline and Month 24
Intraocular pressure will be measured in mmHg, preferably by Goldmann applanation tonometry. Change will be calculated as Month 24 IOP minus baseline IOP and compared between groups.
Baseline and Month 24

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Complete success rate
Zeitfenster: Month 24
Proportion of participants achieving postoperative IOP >5 mmHg and ≤16 mmHg or at least 20 percent IOP reduction from baseline, without additional IOP-lowering medication, without vision-threatening complication, and without additional glaucoma surgery.
Month 24
Qualified success rate
Zeitfenster: Month 24
Proportion of participants achieving postoperative IOP >5 mmHg and ≤16 mmHg or at least 20 percent IOP reduction from baseline, with or without IOP-lowering medication, without vision-threatening complication, and without additional glaucoma surgery.
Month 24
Number of IOP-lowering medications
Zeitfenster: Baseline, Day 1, Day 7, Month 1, Month 3, Month 6, Month 9, Month 12, Month 18, and Month 24
Number and class of topical IOP-lowering medications used at each follow-up visit.
Baseline, Day 1, Day 7, Month 1, Month 3, Month 6, Month 9, Month 12, Month 18, and Month 24
Best-corrected visual acuity
Zeitfenster: Baseline through Month 24
Best-corrected visual acuity will be recorded and converted to LogMAR for analysis.
Baseline through Month 24
Visual field indices
Zeitfenster: Baseline, Month 6, Month 12, Month 18, and Month 24
Humphrey visual field 30-2 SITA Standard indices, including mean deviation and pattern standard deviation, will be recorded with reliability criteria.
Baseline, Month 6, Month 12, Month 18, and Month 24
Retinal nerve fiber layer thickness
Zeitfenster: Baseline, Month 6, Month 12, Month 18, and Month 24
Peripapillary retinal nerve fiber layer thickness will be measured by OCT.
Baseline, Month 6, Month 12, Month 18, and Month 24
Ganglion cell-inner plexiform layer thickness
Zeitfenster: Baseline, Month 6, Month 12, Month 18, and Month 24
Macular ganglion cell-inner plexiform layer thickness will be measured by OCT.
Baseline, Month 6, Month 12, Month 18, and Month 24
Anterior segment parameters by AS-OCT
Zeitfenster: Baseline, Month 1, Month 3, Month 6, Month 9, Month 12, Month 18, and Month 24
AS-OCT parameters may include anterior chamber depth, angle opening distance, trabecular-iris space area, and other protocol-specified anterior segment findings.
Baseline, Month 1, Month 3, Month 6, Month 9, Month 12, Month 18, and Month 24
Ocular surface parameters
Zeitfenster: Baseline, Month 1, Month 3, Month 6, Month 9, Month 12, Month 18, and Month 24
Ocular surface assessment includes lipid layer thickness, tear meniscus height, non-invasive tear break-up time, meibomian gland structure, conjunctival hyperemia, and corneal fluorescein staining.
Baseline, Month 1, Month 3, Month 6, Month 9, Month 12, Month 18, and Month 24
NEI VFQ-25 score
Zeitfenster: Baseline, Month 6, Month 12, Month 18, and Month 24
Vision-related quality of life will be assessed using the National Eye Institute Visual Function Questionnaire-25 total score.
Baseline, Month 6, Month 12, Month 18, and Month 24
GAD-7 score
Zeitfenster: Baseline, Month 6, Month 12, Month 18, and Month 24
Anxiety will be assessed using the Generalized Anxiety Disorder 7-item scale total score.
Baseline, Month 6, Month 12, Month 18, and Month 24
Incidence of adverse events
Zeitfenster: Day 1 through Month 24
Ocular and systemic adverse events and serious adverse events will be recorded, including IOP spike, hypotony, hyphema, corneal edema, anterior chamber inflammation, posterior capsule opacification, infection, and need for additional glaucoma surgery.
Day 1 through Month 24
Health economic indicators
Zeitfenster: Baseline through Month 24
Direct medical costs, medication costs, follow-up costs, complication management costs, and other prespecified economic cost indicators will be summarized.
Baseline through Month 24

Andere Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Tear-fluid biomarker levels
Zeitfenster: Baseline and Month 24
Tear-fluid biomarkers include matrix metalloproteinase (MMP), interleukin-13 (IL-13), and tumor necrosis factor-alpha (TNF-alpha).
Baseline and Month 24
Surgery-drug benefit index
Zeitfenster: Baseline through Month 24
Composite exploratory index integrating IOP control, medication reduction, structural preservation, ocular surface status, quality of life, safety, and economic outcomes.
Baseline through Month 24

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Nanfang Hospital, Southern Medical University

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

15. Juli 2026

Primärer Abschluss (Geschätzt)

31. Dezember 2029

Studienabschluss (Geschätzt)

31. Dezember 2030

Studienanmeldedaten

Zuerst eingereicht

7. Juli 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

7. Juli 2026

Zuerst gepostet (Tatsächlich)

14. Juli 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

14. Juli 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

7. Juli 2026

Zuletzt verifiziert

1. Juli 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • NFEC-2026-303

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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