The Asia Primary Tube Versus Trab (TVT) Study

NCT ID: NCT03274024

Last Updated: 2017-09-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

300 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-09-28

Study Completion Date

2020-10-30

Brief Summary

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Comparison of Ahmed Glaucoma Implant (AGI) against trabeculectomy with mitomycin C in patients with uncontrolled open angle glaucoma

Detailed Description

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The objective of the Asia Primary Tube versus Trab (TVT) study is to compare the efficacy and safety of placement of an Ahmed Glaucoma Implant (AGI) (New World Medical Inc., Rancho Cucamonga, CA, USA) against trabeculectomy with mitomycin C in patients with uncontrolled glaucoma, who may or may not have had previous clear corneal cataract surgery with intraocular lens implantation, over 5 years. Outcome discrimination between the two treatment groups will be made using following parameters:

1. Intraocular pressure
2. Need for supplemental medical therapy
3. Incidence of short and long term surgical complications and need for re-operation.
4. Visual function (Visual acuity and Visual field)

Hypothesis: Glaucoma drainage implants have better surgical outcomes in terms of IOP lowering efficacy compared to trabeculectomy with mitomycin-C over 5 years in Asian patients with medically uncontrolled glaucoma.

Conditions

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Glaucoma

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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Tube implant

Ahmed Glaucoma Implant (AGI) surgery

Group Type EXPERIMENTAL

Ahmed Glaucoma Implant

Intervention Type DEVICE

Conjunctival Flap Scleral Exposure Insertion of Episcleral Plate Priming of the tube prior to AC entrance Insertion of Tube into the Anterior Chamber Suturing tube Coverage of tube

Trabeculectomy

Trabeculectomy with mitomycin C surgery

Group Type ACTIVE_COMPARATOR

Trabeculectomy with Mitomycin C

Intervention Type PROCEDURE

Conjunctival Flap Mitomycin C Application Scleral Flap Paracentesis Excision of Limbal Tissue Peripheral Iridectomy Scleral Flap Closure Conjunctival Flap Closure

Interventions

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Ahmed Glaucoma Implant

Conjunctival Flap Scleral Exposure Insertion of Episcleral Plate Priming of the tube prior to AC entrance Insertion of Tube into the Anterior Chamber Suturing tube Coverage of tube

Intervention Type DEVICE

Trabeculectomy with Mitomycin C

Conjunctival Flap Mitomycin C Application Scleral Flap Paracentesis Excision of Limbal Tissue Peripheral Iridectomy Scleral Flap Closure Conjunctival Flap Closure

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

1. Open angle glaucoma including primary open angle glaucoma, pseudoexfoliative or pigmentary glaucoma.
2. IOP \> 18 mm Hg on 2 or more medications on at least 2 visits
3. Informed consent given and consent form signed.

Exclusion Criteria

1. Unwilling or unable to give consent, unwilling to accept randomisation, or unable to return for scheduled protocol visits.
2. Pregnant or nursing women
3. No light perception vision
4. Previous incisional intraocular surgery, other than uncomplicated clear corneal cataract surgery
5. Previous ocular laser in study eye (keratorefractive surgery and cyclodestructive procedure), except for laser trabeculoplasty procedures (Argon Laser and Selective Laser Trabeculoplasty)
6. Iris neovascularisation or proliferative retinopathy
7. Primary angle closure or primary angle closure glaucoma
8. Iridocorneal endothelial syndrome or anterior segment dysgenesis
9. Epithelial or fibrous downgrowth
10. Aphakia
11. Chronic or recurrent uveitis
12. Severe posterior blepharitis
13. Unwilling to discontinue contact lens use after surgery
14. Glaucoma secondary to penetrating keratoplasty, trauma, steroids, retinal disease/surgery or neovascular disease
15. Conjunctival scarring from prior ocular surgery, trauma or cicatrizing disease precluding a superior trabeculectomy
16. Need for glaucoma surgery combined with other ocular procedures (i.e. cataract surgery, penetrating keratoplasty, or retinal surgery) or anticipated need for urgent additional ocular surgery
17. Advanced glaucoma with MD \<-20dB
Minimum Eligible Age

18 Years

Maximum Eligible Age

85 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Medical Research Council (NMRC), Singapore

OTHER_GOV

Sponsor Role collaborator

Singapore Eye Research Institute

OTHER

Sponsor Role lead

Responsible Party

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Dr Ho Ching Lin

Research Director

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Ching Lin Ho

Role: PRINCIPAL_INVESTIGATOR

Singapore National Eye Centre

Locations

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Singapore Eye Research Institute

Singapore, , Singapore

Site Status RECRUITING

Countries

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Singapore

Central Contacts

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Natalia Porporato, Fellow

Role: CONTACT

+6591378217

Ya Ying Ooi

Role: CONTACT

+658186 7051

Facility Contacts

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Serena Ting

Role: primary

(+65) 8113 5026

Other Identifiers

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R1293/99/2015

Identifier Type: -

Identifier Source: org_study_id

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