Evidence map›Paper›PMID 29261655›Full record

Trial reportPLoS medicine2017

Cell salvage and donor blood transfusion during cesarean section: A pragmatic, multicentre randomised controlled trial (SALVO).

Khalid S Khan, Philip A S Moore, Matthew J Wilson, Richard Hooper, Shubha Allard, Ian Wrench, Lee Beresford, Tracy E Roberts, Carol McLoughlin, James Geoghegan and 10 more

Abstract readRandomized Controlled TrialPragmatic Clinical Trial
In one paragraph

Trial report in PLoS medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 2 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

23 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Cell salvage for the management of postpartum haemorrhage.The Cochrane database of systematic reviews · 2024
    Pooled it
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  10. Patient blood management in pregnancy, the peripartum, and the postpartum period.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2026
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  11. Article
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  17. Routine use of cell salvage during cesarean section: A practice evaluation.Acta obstetricia et gynecologica Scandinavica · 2024
    Article
  18. Article
  19. Management of Postpartum Haemorrhage.Turkish journal of anaesthesiology and reanimation · 2022
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

20 authors.

Khalid S KhanWomen's Health Research Unit, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom.
Philip A S MooreBirmingham Women's Hospital, Birmingham, United Kingdom.ORCID http://orcid.org/0000-0001-7048-1493
Matthew J WilsonSchool of Health and Related Research, University of Sheffield, United Kingdom.
Richard HooperPragmatic Clinical Trials Unit, Centre for Primary Care and Public Health, Queen Mary University of London, United Kingdom.
Shubha AllardNHS Blood and Transplant, London, United Kingdom.
Ian WrenchSheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom.
Lee BeresfordPragmatic Clinical Trials Unit, Centre for Primary Care and Public Health, Queen Mary University of London, United Kingdom.ORCID http://orcid.org/0000-0002-7754-8053
Tracy E RobertsHealth Economics Unit, Institute of Applied Health Research, University of Birmingham, United Kingdom.ORCID http://orcid.org/0000-0002-0624-0537
Carol McLoughlinHealth Economics Unit, Institute of Applied Health Research, University of Birmingham, United Kingdom.ORCID http://orcid.org/0000-0002-6861-8259
James GeogheganBirmingham Women's Hospital, Birmingham, United Kingdom.
Jane P DanielsNottingham Clinical Trials Unit, University of Nottingham, United Kingdom.ORCID http://orcid.org/0000-0003-3324-6771
Sue CatlingSingleton Hospital, Swansea, United Kingdom.
Vicki A ClarkSimpson Centre for Reproductive Health, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom.
Paul AyukRoyal Victoria Infirmary, Newcastle-upon-Tyne, United Kingdom.
Stephen RobsonInstitute of Cellular Medicine, Newcastle University, United Kingdom.
Fang Gao-SmithPeri-operative, Critical Care and Trauma Trials Group, University of Birmingham, United Kingdom.
Matthew HoggRoyal London Hospital, Barts Health NHS Trust, London, United Kingdom.
Doris LanzWomen's Health Research Unit, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom.ORCID http://orcid.org/0000-0001-9879-3069
Julie DoddsWomen's Health Research Unit, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom.
SALVO study group

Funding

Department of Health 10/57/32
6 · The paper itself

Abstract

backgroundExcessive haemorrhage at cesarean section requires donor (allogeneic) blood transfusion. Cell salvage may reduce this requirement. METHODS AND

findingsWe conducted a pragmatic randomised controlled trial (at 26 obstetric units; participants recruited from 4 June 2013 to 17 April 2016) of routine cell salvage use (intervention) versus current standard of care without routine salvage use (control) in cesarean section among women at risk of haemorrhage. Randomisation was stratified, using random permuted blocks of variable sizes. In an intention-to-treat analysis, we used multivariable models, adjusting for stratification variables and prognostic factors identified a priori, to compare rates of donor blood transfusion (primary outcome) and fetomaternal haemorrhage ≥2 ml in RhD-negative women with RhD-positive babies (a secondary outcome) between groups. Among 3,028 women randomised (2,990 analysed), 95.6% of 1,498 assigned to intervention had cell salvage deployed (50.8% had salvaged blood returned; mean 259.9 ml) versus 3.9% of 1,492 assigned to control. Donor blood transfusion rate was 3.5% in the control group versus 2.5% in the intervention group (adjusted odds ratio [OR] 0.65, 95% confidence interval [CI] 0.42 to 1.01, p = 0.056; adjusted risk difference -1.03, 95% CI -2.13 to 0.06). In a planned subgroup analysis, the transfusion rate was 4.6% in women assigned to control versus 3.0% in the intervention group among emergency cesareans (adjusted OR 0.58, 95% CI 0.34 to 0.99), whereas it was 2.2% versus 1.8% among elective cesareans (adjusted OR 0.83, 95% CI 0.38 to 1.83) (interaction p = 0.46). No case of amniotic fluid embolism was observed. The rate of fetomaternal haemorrhage was higher with the intervention (10.5% in the control group versus 25.6% in the intervention group, adjusted OR 5.63, 95% CI 1.43 to 22.14, p = 0.013). We are unable to comment on long-term antibody sensitisation effects.

conclusionsThe overall reduction observed in donor blood transfusion associated with the routine use of cell salvage during cesarean section was not statistically significant.

trial registrationThis trial was prospectively registered on ISRCTN as trial number 66118656 and can be viewed on http://www.isrctn.com/ISRCTN66118656.

Indexed as

Cesarean SectionAdultBlood DonorsBlood Loss, SurgicalBlood Transfusion, AutologousFemaleHumansOperative Blood SalvagePatient Care PlanningPregnancyPrognosisTreatment Outcome

Identifiers

PMID29261655
PMCPMC5736174

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.