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Urinary neprilysin for early detection of acute kidney injury after cardiac surgery: A prospective observational study.

Abstract：

BACKGROUND:Acute kidney injury (AKI) predicts adverse outcomes after cardiac surgery. The accuracy of using changes in serum creatinine for diagnosis and grading of AKI is limited in the peri-operative cardiac surgical setting and AKI may be underdiagnosed due to haemodilution from cardiopulmonary bypass priming and the need for intra-operative and postoperative volume resuscitation. OBJECTIVES:To determine whether the urinary biomarker neprilysin can be used as a marker for the early detection of AKI after cardiac surgery. DESIGN:Prospective, observational cohort study. SETTING:Austrian tertiary referral centre. PATIENTS:96 Patients undergoing elective cardiac surgery with cardiopulmonary bypass. MAIN OUTCOME MEASURES:Differences and discriminatory power of neprilysin levels early after cardiac surgery and on postoperative day 1 between patients with or without AKI, as defined by the Kidney Disease Improving Global Outcomes Group. RESULTS:AKI was found in 27% (n=26). The median neprilysin levels on postoperative day 1 were significantly higher in the AKI than in the non-AKI group, 4.0 [interquartile range (IQR): 2 to 6.25] vs. 2.0 ng ml [IQR: 1.0 to 4.5], P = 0.0246, respectively. In addition, the median neprilysin levels at the end of surgery were significantly different between both groups, 5.0 [IQR: 2.0 to 9.0] vs. 2.0 ng ml [IQR: 1.0 to 4.0], P = 0.0055, respectively. The discriminatory power of neprilysin for detecting early AKI corresponded to an area under the curve of 0.77 (95% confidence interval, 0.65 to 0.90). CONCLUSION:Urinary neprilysin has potential as a biomarker for the early detection of AKI after cardiac surgery and has comparable discriminatory power to recently studied AKI biomarkers. TRIAL REGISTRATION:The trial was registered at ClinicalTrials.gov (NCT03854825, https://clinicaltrials.gov/ct2/show/NCT03854825).

journal_name

Eur J Anaesthesiol

journal_title

European journal of anaesthesiology

authors

Bernardi MH,Wagner L,Ryz S,Puchinger J,Nixdorf L,Edlinger-Stanger M,Geilen J,Kainz M,Hiesmayr MJ,Lassnigg A

doi

10.1097/EJA.0000000000001321

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

13-21

issue

eissn

0265-0215

issn

1365-2346

journal_volume

pub_type

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Urinary neprilysin for early detection of acute kidney injury after cardiac surgery: A prospective observational study.