Evidence map›Paper›PMID 32765127›Full record

ArticleMedical devices (Auckland, N.Z.)2020

Comparison of Silicone- and Porous-Plate Ahmed Glaucoma Valves.

Tina M Roa, Peter A Netland, Vital P Costa, Steven R Sarkisian, Lama A Al-Aswad, Marlene R Moster, Iqbal I K Ahmed

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Medical devices (Auckland, N.Z.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01883856 (Comparison of Silicone and Porous Plate Ahmed Glaucoma Valves), which is not on this map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact, top 90% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT01883856 nacompletednot on this map

Comparison of Silicone and Porous Plate Ahmed Glaucoma Valves

TypeinterventionalSponsorPeter Netland, MDRan2012 to 2018Enrolled52ConditionsGlaucomaArmsSilicone plate Ahmed Glaucoma Valve (Model FP7), Porous Plate Ahmed Glaucoma Valve (Model M4)
3 · Its place in the literature

Who cites it

1 citing paper in PubMed, 2 citations in OpenAlex.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 6 institutions in 3 countries.

Tina M RoaDepartment of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.
Peter A NetlandDepartment of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.
Vital P CostaDepartment of Ophthalmology, University of Campinas, Campinas, Brazil.
Steven R SarkisianOklahoma Eye Surgeons, PLLC, Oklahoma City, OK 73112, USA.
Lama A Al-AswadDepartment of Ophthalmology, NYU Grossman School of Medicine, NYU Langone Health, New York, NY 10017, USA.ORCID 0000-0003-2440-9559
Marlene R MosterGlaucoma Service, Wills Eye Hospital, Philadelphia, PA 19107, USA.
Iqbal I K AhmedDepartment of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada.
University of Virginia · USNorthwest Eye Surgeons · USNYU Langone Health · USUniversidade Estadual de Campinas (UNICAMP) · BRUniversity of Toronto · CAWills Eye Hospital · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeOur aim was to evaluate and compare the clinical outcomes after implantation of the silicone-plate (model FP7) and porous polyethylene-plate (model M4) Ahmed Glaucoma Valves. PATIENTS AND

methodsThis was a prospective, multicenter, comparative series. A total of 52 eyes (52 patients) were treated with either the silicone or porous plate Ahmed Glaucoma Valve implant. Hypertensive phase was defined as intraocular pressure >21 mmHg during the first 3 months postoperatively. Success was defined as 5 mmHg ≤intraocular pressure ≤21 mmHg (with or without additional glaucoma medications), without loss of light perception and without additional glaucoma procedures. Patients were monitored for 1 year after surgery.

resultsThe pre-operative intraocular pressure was 29.9 ± 6.6 mmHg and 33.8 ± 10.5 in the silicone-plate and porous-plate groups, respectively (P = 0.118). At 12 months after surgery, the mean intraocular pressure was 13.6 ± 4.7 mmHg in the silicone-plate group and 17.9 ± 10.9 mmHg in the porous-plate group (P = 0.141). The mean number of glaucoma medications at 12 months was 1.64 ± 1.40 mmHg and 1.89 ± 1.54 mmHg in the silicone- and porous-plate groups, respectively (P = 0.605). Hypertensive phase was not significantly different in the two groups (50.0% of the silicone-plate and 57.7% of the porous-plate groups, P = 0.578). At 12 months after surgery, the percent success for the silicone-plate and porous-plate groups was 88.5% and 53.8%, respectively (P = 0.005). Complications were similar in the two groups.

conclusionThe porous-plate Ahmed Glaucoma Valve showed similar average intraocular pressure reduction compared with the silicone-plate model. At 12 months after surgery, there was a significantly lower success rate in the porous-plate compared with the silicone-plate group.

Indexed as

Ahmed Glaucoma Valveglaucoma drainage implantMedpormodel FP7model M4porous polyethylene

Identifiers

PMID32765127
PMCPMC7371999
OpenAlexW3043482905

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.