Platypnea-orthodeoxia syndrome: an intriguing perioperative hypoxemia case report.

Eunice Mendes, Mariana Vaz Gomes, Cl Udia Carreira, N Ídia Gon Alves, Ana Filipa Ribeiro

Open access · diamondAbstract readCase Reports

In one paragraph

Article in Brazilian journal of anesthesiology (Elsevier). 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

–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.

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, 0 citations in OpenAlex.

Anesthetic management of Platypnea-orthodeoxia syndrome in a young patient with residual atrial septal defect following congenital heart surgery.JA clinical reports · 2025
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

5 authors at 1 institution in 1 country.

Eunice MendesCentro Hospitalar e Universit..rio de Coimbra, Servi..o de Anestesiologia, Coimbra, Portugal. Electronic address: ms.eunice93@gmail.com.

Mariana Vaz GomesCentro Hospitalar e Universit..rio de Coimbra, Servi..o de Anestesiologia, Coimbra, Portugal.

Cl Udia CarreiraCentro Hospitalar e Universit..rio de Coimbra, Servi..o de Anestesiologia, Coimbra, Portugal.

N Ídia Gon AlvesCentro Hospitalar e Universit..rio de Coimbra, Servi..o de Anestesiologia, Coimbra, Portugal.

Ana Filipa RibeiroCentro Hospitalar e Universit..rio de Coimbra, Servi..o de Anestesiologia, Coimbra, Portugal.

Hospitais da Universidade de Coimbra · PT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Platypnea-orthodeoxia syndrome (POS) is a rare condition of positional hypoxemia and dyspnea. The following is a case of hypoxemia for no obvious reason in the perioperative scenario. A 70-year-old male patient was submitted to a radical prostatectomy. On several occasions after anesthetic induction, peripheral oxygen saturation decreased without any understandable cause. In the postanesthesia care unit, severe hypoxemia occurred in the upright position, oddly correcting with recumbency. An echocardiography showed a right-to-left intracardiac shunt through a patent foramen ovale with no pulmonary hypertension, establishing POS. Achieving this diagnosis required a broad workup with a high degree of suspicion.

Indexed as

Foramen Ovale, PatentPlatypnea Orthodeoxia SyndromeAgedDyspneaHumansHypoxiaMalePostureCase reportDyspneaHypotensionHypoxiaPatent Foramen OvalePerioperative period

Identifiers

PMID34118260

DOI10.1016/j.bjane.2021.05.015

PMCPMC10877329

OpenAlexW3168646385

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Textmetadata

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.