Evidence map›Paper›PMID 31819362›Full record

ArticleClinical ophthalmology (Auckland, N.Z.)2019

Early Results of Goniotomy with the Kahook Dual Blade, a Novel Device for the Treatment of Glaucoma.

Helen L Kornmann, Ronald L Fellman, William J Feuer, Michelle R Butler, David G Godfrey, Oluwatosin U Smith, Matthew E Emanuel, Davinder S Grover

Open access · goldAbstract read
In one paragraph

Article in Clinical ophthalmology (Auckland, N.Z.), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
4.8field-weighted citation impact, top 5% 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 42 citations in OpenAlex.

  1. Minimally Invasive Glaucoma Surgery: Where Is the Evidence?Asia-Pacific journal of ophthalmology (Philadelphia, Pa.)
    Pooled it
  2. Comparative One-Year Outcomes of T-HookJournal of clinical medicine · 2026
    Article
  3. Visual Function After Schlemm's Canal-Based MIGS.Journal of clinical medicine · 2025
    Review
  4. Review
  5. Article
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  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Kahook Dual Blade Goniotomy vs iStentClinical ophthalmology (Auckland, N.Z.) · 2021
    Article
  19. Article
  20. 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

8 authors at 1 institution in 1 country.

Helen L KornmannGlaucoma Associates of Texas, Dallas, Texas, USA.
Ronald L FellmanGlaucoma Associates of Texas, Dallas, Texas, USA.
William J FeuerDepartment of Ophthalmology, Bascom Palmer Eye Institute, Miami, Florida, USA.
Michelle R ButlerGlaucoma Associates of Texas, Dallas, Texas, USA.
David G GodfreyGlaucoma Associates of Texas, Dallas, Texas, USA.
Oluwatosin U SmithGlaucoma Associates of Texas, Dallas, Texas, USA.ORCID 0000-0001-6304-6039
Matthew E EmanuelGlaucoma Associates of Texas, Dallas, Texas, USA.
Davinder S GroverGlaucoma Associates of Texas, Dallas, Texas, USA.
Glaucoma Associates of Texas · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo report the outcomes of patients who underwent goniotomy with the Kahook Dual Blade (KDB) either as a standalone procedure or in combination with cataract extraction. PATIENTS AND

methodsThis retrospective chart review included 111 eyes of 90 patients who underwent KDB goniotomy from January to November 2016 at Glaucoma Associates of Texas. KDB goniotomy was combined with cataract surgery in 100 eyes. The main outcome measures were postoperative intraocular pressure (IOP) and number of IOP lowering medications.

resultsPreoperatively, mean IOP was 17.1 ± 4.7 mmHg (range 8-34 mmHg) and mean number of IOP lowering medications was 2.4 ± 1.3 (range 0-6). Postoperatively, mean IOP was 14.9 mmHg, 13.9 mmHg, 14.1 mmHg, 14.4 mmHg, and 14.7 mmHg at 1, 3, 6, 9, and 12 months follow-up, respectively (all p <0.004). Mean numbers of IOP lowering medications were 0.8, 1.0, 1.0, 1.0, and 1.6 at 1, 3, 6, 9, and 12 months follow-up, respectively (all p <0.001). The cumulative reoperation rates for uncontrolled IOP after KDB were 0%, 1.0%, 2.1%, and 4.6% at 3, 6, 9, and 12 months, respectively. Eyes with a preoperative IOP >21 mmHg were significantly more likely to undergo reoperation (p = 0.038, log-rank test). There were no serious complications at any time point in the follow-up period.

conclusionThe Kahook Dual Blade results in a reduction in IOP and use of glaucoma medications after one year of follow-up. Further prospective studies are needed to fully characterize safety and efficacy.

Indexed as

goniotomykahook dual blademinimally invasive

Identifiers

PMID31819362
PMCPMC6896929
OpenAlexW2991393483

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

None linked

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.