Case report: Surgical management of vitreous obstruction following PreserFlo ® MicroShunt implantation.

Giovanni Tondini, Giovanni Staurenghi, Sara Bochicchio, Angelica Dipinto, Matteo Giuseppe Cereda, De Angelis Stefano

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In one paragraph

Article in American journal of ophthalmology case reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it

0cells of the map it votes in

1citing papers in PubMed

0.3field-weighted citation impact, top 40% 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

1 citing paper in PubMed, 1 citations in OpenAlex.

Tube obstruction caused by blood clots following PreserFlo MicroShunt surgery.American journal of ophthalmology case reports · 2026
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

6 authors at 1 institution in 1 country.

Giovanni TondiniEye Clinic, Department of Biomedical and Clinical Science, Luigi Sacco Hospital, University of Milan, Milan, Italy.

Giovanni StaurenghiEye Clinic, Department of Biomedical and Clinical Science, Luigi Sacco Hospital, University of Milan, Milan, Italy.

Sara BochicchioEye Clinic, Department of Biomedical and Clinical Science, Luigi Sacco Hospital, University of Milan, Milan, Italy.

Angelica DipintoEye Clinic, Department of Biomedical and Clinical Science, Luigi Sacco Hospital, University of Milan, Milan, Italy.

Matteo Giuseppe CeredaEye Clinic, Department of Biomedical and Clinical Science, Luigi Sacco Hospital, University of Milan, Milan, Italy.

De Angelis StefanoEye Clinic, Department of Biomedical and Clinical Science, Luigi Sacco Hospital, University of Milan, Milan, Italy.

University of Milan · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Purpose: To describe a clinical case of lumen obstruction a few days after implantation of the PreserFlo® Microshunt which has been resolved by anterior vitrectomy. Observation: A 76-year-old patient with advanced and progressing primary open-angle glaucoma (POAG) presented ten days after PreserFlo® Microshunt implantation in his left eye with an intraocular pressure (IOP) of 24 mmHg because of vitreous obstruction. Anterior vitrectomy with 25 Gauge vitrector was performed to remove the vitreous using a bimanual technique with two corneal accesses. The surgery was successful in lowering uncontrolled IOP without device repositioning. A free lumen and a IOP in the low range of tens was observed during follow-up. Conclusions and importance: PreserFlo ® MicroShunt obstruction by vitreous in pseudophakic patient is a possible complication. Anterior vitrectomy without the need of tube repositioning was successful in lowering uncontrolled IOP.

Indexed as

Anterior vitrectomyMinimally invasive glaucoma surgery (MIGS)PreserFlo ® MicroShuntPrimary open angle glaucomaVitreous device obstruction

Identifiers

PMID38077778

DOI10.1016/j.ajoc.2023.101967

PMCPMC10701580

OpenAlexW4389052683

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LicenceCC BY-NC-ND

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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.