Evidence map›Paper›PMID 33281323›Full record

ArticleIndian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine2020

Mechanisms of Hypoxia in COVID-19 Patients: A Pathophysiologic Reflection.

Mohana Nitsure, Bhakti Sarangi, Guruprasad H Shankar, Venkat S Reddy, Ajay Walimbe, Varsha Sharma, Shirish Prayag

Abstract read
In one paragraph

Article in Indian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

22 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Review
  3. Article
  4. Article
  5. Changes in Driving Pressure vs Oxygenation as Predictor of Mortality in Moderate to Severe Acute Respiratory Distress Syndrome Patients Receiving Prone Position Ventilation.Indian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine · 2024
    Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Silent Hypoxemia in Patients with COVID-19 Pneumonia: A Review.Medical science monitor : international medical journal of experimental and clinical research · 2021
    Review
  18. Clinical Characteristics and Outcomes of COVID-19 Patients Hospitalized in Intensive Care Unit.Indian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine · 2021
    Article
  19. Contemporary approach to understand and manage COVID-19-related arrhythmia.The Egyptian heart journal : (EHJ) : official bulletin of the Egyptian Society of Cardiology · 2021
    Review
  20. SARS-CoV-2 Proteins Bind to Hemoglobin and Its Metabolites.International journal of molecular sciences · 2021
    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.

Mohana NitsureDepartment of Pediatrics, Bharati Vidyapeeth Medical College and Hospital, Pune, Maharashtra, India.
Bhakti SarangiDepartment of Pediatrics, Bharati Vidyapeeth Medical College and Hospital, Pune, Maharashtra, India.
Guruprasad H ShankarDepartment of Pediatrics, Bharati Vidyapeeth Medical College and Hospital, Pune, Maharashtra, India.
Venkat S ReddyDepartment of Pediatrics, Bharati Vidyapeeth Medical College and Hospital, Pune, Maharashtra, India.
Ajay WalimbeDepartment of Pediatrics, Bharati Vidyapeeth Medical College and Hospital, Pune, Maharashtra, India.
Varsha SharmaDepartment of Pediatrics, Bharati Vidyapeeth Medical College and Hospital, Pune, Maharashtra, India.
Shirish PrayagCritical Care Medicine, Prayag Hospital, Shree Medical Foundation, Pune, Maharashtra, India.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Coronavirus disease-2019 (COVID-19) causes severe hypoxemia which fulfills the criteria of acute respiratory distress syndrome (ARDS) but is not accompanied by typical features of the syndrome. The combination of factors including low P/F ratios, high A-a gradient, relatively preserved lung mechanics, and normal pulmonary pressures may imply a process occurring on the vascular side of the alveolar-capillary unit. The scant but rapidly evolving data available on the pathophysiology are seemingly conflicting, indicating the relative dominance of intrapulmonary shunting or dead space in different studies. In this hypothesis paper, we attempt to gather and explain these observations within a unified conceptual framework by invoking the relative contributions of microvascular thrombosis, along with two proposed vascular mechanisms of capillary flow redistribution and flow through intrapulmonary arteriovenous anastomoses (IPAVA).

Indexed as

Acute respiratory distress syndromeCOVID-19HypoxemiaIntrapulmonary arteriovenous anastomoses

Identifiers

PMID33281323
PMCPMC7689135

What OpenQuestion holds

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Registered trials

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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.