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Ebner F, Harmon MBA, Aneman A, Cronberg T, Friberg H, Hassager C, Juffermans N, Kjærgaard J, Kuiper M, Mattsson N, Pelosi P, Ullén S, Undén J, Wise MP, Nielsen N. Carbon dioxide dynamics in relation to neurological outcome in resuscitated out-of-hospital cardiac arrest patients: an exploratory Target Temperature Management Trial substudy. Crit Care 2018; 22:196. [PMID: 30119692 PMCID: PMC6098627 DOI: 10.1186/s13054-018-2119-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 07/03/2018] [Indexed: 11/10/2022] Open
Abstract
Background Dyscarbia is common in out-of-hospital cardiac arrest (OHCA) patients and its association to neurological outcome is undetermined. Methods This is an exploratory post-hoc substudy of the Target Temperature Management (TTM) trial, including resuscitated OHCA patients, investigating the association between serial measurements of arterial partial carbon dioxide pressure (PaCO2) and neurological outcome at 6 months, defined by the Cerebral Performance Category (CPC) scale, dichotomized to good outcome (CPC 1 and 2) and poor outcome (CPC 3–5). The effects of hypercapnia and hypocapnia, and the time-weighted mean PaCO2 and absolute PaCO2 difference were analyzed. Additionally, the association between mild hypercapnia (6.0–7.30 kPa) and neurological outcome, its interaction with target temperature (33 °C and 36 °C), and the association between PaCO2 and peak serum-Tau were evaluated. Results Of the 939 patients in the TTM trial, 869 were eligible for analysis. Ninety-six percent of patients were exposed to hypocapnia or hypercapnia. None of the analyses indicated a statistical significant association between PaCO2 and neurological outcome (P = 0.13–0.96). Mild hypercapnia was not associated with neurological outcome (P = 0.78) and there was no statistically significant interaction with target temperature (Pinteraction = 0.95). There was no association between PaCO2 and peak serum-Tau levels 48 or 72 h after return of spontaneous circulation (ROSC). Conclusions Dyscarbia is common after ROSC. No statistically significant association between PaCO2 in the post-cardiac arrest phase and neurological outcome at 6 months after cardiac arrest was detected. There was no significant interaction between mild hypercapnia and temperature in relation to neurological outcome. Electronic supplementary material The online version of this article (10.1186/s13054-018-2119-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Florian Ebner
- Department of Anesthesia and Intensive Care, Helsingborg Hospital, Helsingborg, Sweden.
| | - Matt B A Harmon
- Department of Intensive Care Medicine, Laboratory of Experimental Intensive Care and Anesthesiology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, Amsterdam, 1105 AZ, The Netherlands
| | - Anders Aneman
- Department of Intensive Care, Liverpool Hospital, Locked Bag 7103, Liverpool BC, Sydney, NSW, 1871, Australia
| | - Tobias Cronberg
- Department of Clinical Sciences, Neurology, Skåne University Hospital, Getingevägen 5, 221 85, Lund, Sweden
| | - Hans Friberg
- Department of Anaesthesia and Intensive Care, Skåne University Hospital, Getingevägen 5, 221 85, Lund, Sweden
| | - Christian Hassager
- Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Nicole Juffermans
- Department of Intensive Care Medicine, Laboratory of Experimental Intensive Care and Anesthesiology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, Amsterdam, 1105 AZ, The Netherlands
| | - Jesper Kjærgaard
- Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Michael Kuiper
- Intensive Care Unit, Leeuwarden Medical Centrum, Borniastraat 38, NL8934 AD, Leeuwarden, The Netherlands
| | - Niklas Mattsson
- Department of Clinical Sciences, Neurology, Skåne University Hospital, Getingevägen 5, 221 85, Lund, Sweden
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, Anesthesia and Intensive Care, San Martino Policlinico Hospital, University of Genoa, Genoa, Italy
| | - Susann Ullén
- Clinical Studies Sweden, Skåne University Hospital, Remissgatan 4, 221 85, Lund, Sweden
| | - Johan Undén
- Department of Anaesthesia and Intensive Care, Hallands Hospital, Halmstad, Sweden
| | - Matt P Wise
- Adult Critical Care, University Hospital of Wales, Heath Park, Cardiff, CF144XW, UK
| | - Niklas Nielsen
- Department of Anesthesia and Intensive Care, Helsingborg Hospital, Helsingborg, Sweden.
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