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Multicenter Study
. 2019 Jul 15;23(1):256.
doi: 10.1186/s13054-019-2535-1.

Recovery from acute kidney injury as a potent predictor of survival and good neurological outcome at discharge after out-of-hospital cardiac arrest

Yoo Seok Park  1 , Yoon Hee Choi  2 , Je Hyeok Oh  3 , In Soo Cho  4 , Kyoung-Chul Cha  5 , Byung-Sun Choi  6 , Je Sung You  1
Affiliations
Multicenter Study

Recovery from acute kidney injury as a potent predictor of survival and good neurological outcome at discharge after out-of-hospital cardiac arrest

Yoo Seok Park et al. Crit Care. .

Abstract

Background: Acute kidney injury (AKI) after out-of-hospital cardiac arrest (OHCA) is a well-known predictor for mortality. However, the natural course of AKI including recovery rate after OHCA is uncertain. This study investigated the clinical course of AKI after OHCA and determined whether recovery from AKI impacted the outcomes of OHCA.

Methods: This retrospective multicentre cohort study included adult OHCA patients treated with targeted temperature management (TTM) between January 2016 and December 2017. AKI was diagnosed using the Kidney Disease: Improving Global Outcomes criteria. The primary outcome was the recovery rate after AKI and its association with survival and good neurological outcome at discharge.

Results: A total of 3697 OHCA patients from six hospitals were screened and 275 were finally included. AKI developed in 175/275 (64%) patients and 69/175 (39%) patients recovered from AKI. In most cases, AKI developed within three days of return of spontaneous circulation [155/175 (89%), median time to AKI development 1 (1-2) day] and patients recovered within seven days of return of spontaneous circulation [59/69 (86%), median time to AKI recovery 3 (2-7) days]. Duration of AKI was significantly longer in the AKI non-recovery group than in the AKI recovery group [5 (2-9) vs. 1 (1-5) days; P < 0.001]. Most patients were diagnosed with AKI stage 1 initially [120/175 (69%)]. However, the number of stage 3 AKI patients increased from 30/175 (17%) to 77/175 (44%) after the initial diagnosis of AKI. The rate of survival discharge was significantly higher in the AKI recovery group than in the AKI non-recovery group [45/69 (65%) vs. 17/106 (16%); P < 0.001]. Recovery from AKI was a potent predictor of survival and good neurological outcome at discharge in the multivariate analysis (adjusted odds ratio, 8.308; 95% confidence interval, 3.120-22.123; P < 0.001 and adjusted odds ratio, 36.822; 95% confidence interval, 4.097-330.926; P = 0.001).

Conclusions: In our cohort of adult OHCA patients treated with TTM (n = 275), the recovery rate from AKI after OHCA was 39%, and recovery from AKI was a potent predictor of survival and good neurological outcome at discharge.

Keywords: Acute kidney injury; Out-of-hospital cardiac arrest; Survival rate; Targeted temperature management; Therapeutic hypothermia.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Flow chart of the study population. AKI, acute kidney injury; DNAR, do-not-attempt-resuscitation; DOA, death on arrival; ESRD, end-stage renal disease; ROSC, return of spontaneous circulation; TTM, targeted temperature management
Fig. 2
Fig. 2
Changes in the stage of acute kidney injury after out-of-hospital cardiac arrest. AKI, acute kidney injury; NRG, non-recovery group; RG, recovery group
See this image and copyright information in PMC

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