Evidence map›Paper›PMID 27544077›Full record

ArticleCritical care (London, England)2016

Intra-operative events during cardiac surgery are risk factors for the development of delirium in the ICU.

Alain Rudiger, Hülya Begdeda, Daniela Babic, Bernard Krüger, Burkhardt Seifert, Maria Schubert, Donat R Spahn, Dominique Bettex

Abstract read
In one paragraph

Article in Critical care (London, England), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing 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

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

  1. Pooled it
  2. The effect of early mobilization of post-cardiac surgery patients on delirium: a pilot study.European journal of physical and rehabilitation medicine · 2026
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  13. [Postoperative Delirium in Patients on Cardiopulmonary Bypass for Cardiovascular Surgeries: Incidence and Influencing Factors].Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition · 2023
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors.

Alain RudigerCardio-Surgical Intensive Care Unit, Institute of Anesthesiology, University Hospital Zurich and University of Zurich, Rämistrasse 100, CH-8091, Zurich, Switzerland. alain.rudiger@usz.ch.ORCID http://orcid.org/0000-0001-7943-7624
Hülya BegdedaCardio-Surgical Intensive Care Unit, Institute of Anesthesiology, University Hospital Zurich and University of Zurich, Rämistrasse 100, CH-8091, Zurich, Switzerland.
Daniela BabicCardio-Surgical Intensive Care Unit, Institute of Anesthesiology, University Hospital Zurich and University of Zurich, Rämistrasse 100, CH-8091, Zurich, Switzerland.
Bernard KrügerCardio-Surgical Intensive Care Unit, Institute of Anesthesiology, University Hospital Zurich and University of Zurich, Rämistrasse 100, CH-8091, Zurich, Switzerland.
Burkhardt SeifertEpidemiology, Biostatistics and Prevention Institute (EBPI), Department of Biostatistics, University of Zurich, Hirschengraben 84, CH-8001, Zurich, Switzerland.
Maria SchubertCentre of Clinical Nursing Science, University Hospital Zurich, Rämistrasse 100, CH-8091, Zurich, Switzerland.
Donat R SpahnInstitute of Anesthesiology, University Hospital Zurich and University of Zurich, Rämistrasse 100, CH-8091, Zurich, Switzerland.
Dominique BettexCardio-Surgical Intensive Care Unit, Institute of Anesthesiology, University Hospital Zurich and University of Zurich, Rämistrasse 100, CH-8091, Zurich, Switzerland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRisk factors for delirium following cardiac surgery are incompletely understood. The aim of this study was to investigate whether intra-operative pathophysiological alterations and therapeutic interventions influence the risk of post-operative delirium.

methodsThis retrospective cohort study was performed in a 12-bed cardiosurgical intensive care unit (ICU) of a university hospital and included patients consecutively admitted after cardiac surgery during a 2-month period. The diagnosis of delirium was made clinically using validated scores. Comparisons between patients with and without delirium were performed with non-parametric tests. Logistic regression was applied to identify independent risk factors. Results are given as number (percent) or median (range).

resultsOf the 194 consecutive post-cardiac surgery patients, 50 (26 %) developed delirium during their ICU stay. Univariate analysis revealed that significant differences between patients with and without delirium occurred in the following intra-operative variables: duration of cardiopulmonary bypass (184 [72-299] vs 113 (37-717) minutes, p < 0.001), lowest mean arterial pressure (50 [30-70] vs 55 [30-75] mmHg, p = 0.004), lowest haemoglobin level (85 [56-133] vs 98 [53-150] g/L, p = 0.005), lowest body temperature (34.5 [24.4-37.2] vs 35.1 [23.9-37.2] °C, p = 0.035), highest noradrenaline support (0.11 [0.00-0.69] vs 0.07 [0.00-0.42] μg/kg/minute, p = 0.001), and frequency of red blood cell transfusions (18 [36 %] vs 26 [18 %], p = 0.018) and platelet transfusions (23 [46 %] vs 24 [17 %], p < 0.001). Only platelet transfusions remained an independent risk factor in the multivariate analysis (p < 0.001).

conclusionsIn patients undergoing cardiac surgery, various intra-operative events, such as transfusion of platelets, were risk factors for the development of a post-operative delirium in the ICU. Further research is needed to unravel the underlying mechanisms.

Indexed as

AdultAgedAged, 80 and overArterial PressureBlood TransfusionBody TemperatureCardiac Surgical ProceduresCardiopulmonary BypassCohort StudiesDeliriumFemaleHemoglobinsHumansIntensive Care UnitsLogistic ModelsMaleHemoglobinsCardiac surgeryCardiopulmonary bypassDeliriumIntensive care unitPlateletsRisk factorsTransfusion

Identifiers

PMID27544077
PMCPMC4992555

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.