Association between prehospital i-gel insertion and PCO2 in patients with out-of-hospital cardiac arrest

  • Cho, Eunsom (Department of Emergency Medicine, Ajou University Medical Center, Ajou University School of Medicine) ;
  • Cho, Eun-Hye (Department of Emergency Medicine, Ajou University Medical Center, Ajou University School of Medicine) ;
  • Kim, Hyuk-Hoon (Department of Emergency Medicine, Ajou University Medical Center, Ajou University School of Medicine) ;
  • Choi, Sang-Cheon (Department of Emergency Medicine, Ajou University Medical Center, Ajou University School of Medicine) ;
  • Min, Young-Gi (Department of Emergency Medicine, Ajou University Medical Center, Ajou University School of Medicine) ;
  • Kang, So Young (Office of Biostatistics, Institute of Medical Sciences, Ajou University Medical Center, Ajou University School of Medicine) ;
  • Chae, Minjung Kathy (Department of Emergency Medicine, Ajou University Medical Center, Ajou University School of Medicine)
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  • ;
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  • 최민정 (아주대학교 의과대학 응급의학교실)
  • Received : 2018.06.29
  • Accepted : 2018.08.17
  • Published : 2018.12.31

Abstract

Objective: This study examined the initial partial pressure of carbon dioxide ($PCO_2$) as a possible indicator of prehospital ventilation and its association with prehospital i-gel in out-of-hospital cardiac arrest (OHCA) patients. Methods: The demographics and arrest parameters, including i-gel insertion and initial arterial blood gas analysis, of OHCA patients who visited the emergency department were analyzed retrospectively. Linear regression analysis was performed to examine the association between i-gel insertion and the initial $PCO_2$. Results: A total of 106 patients were investigated. Fifty-six patients had prehospital i-gel insertion and 50 patients did not have a prehospital advanced airway. The initial $PCO_2$ was higher in the i-gel group than the no advanced airway group (105.2 mmHg [77.5-134.9] vs. 87.5 mmHg [56.8-115.3], P=0.03). Prehospital i-gel insertion was associated with a higher initial $PCO_2$ level (${\beta}$ coefficient, 20.3; 95% confidence interval, 2.6-37.9; P=0.03). Conclusion: Prehospital insertion of i-gel was associated with higher initial $PCO_2$ values in OHCA patients compared to no advanced airway.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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