Retrospective Study
Copyright ©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastrointest Surg. Jul 27, 2020; 12(7): 326-335
Published online Jul 27, 2020. doi: 10.4240/wjgs.v12.i7.326
Neutrophil-to-lymphocyte ratio predicts acute kidney injury occurrence after gastrointestinal and hepatobiliary surgery
Jian-Bin Bi, Jia Zhang, Yi-Fan Ren, Zhao-Qing Du, Zheng Wu, Yi Lv, Rong-Qian Wu
Jian-Bin Bi, Jia Zhang, Yi-Fan Ren, Zhao-Qing Du, Zheng Wu, Yi Lv, Rong-Qian Wu, National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, Shaanxi Provincial Center for Regenerative Medicine and Surgical Engineering, Institute of Advanced Surgical Technology and Engineering, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
Jian-Bin Bi, Jia Zhang, Yi-Fan Ren, Zhao-Qing Du, Zheng Wu, Yi Lv, Department of Hepatobiliary Surgery, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
Author contributions: Bi JB and Wu RQ were involved in the design of the research; Wu Z and Lv Y provided guidance on clinical issues; Bi JB, Zhang J, Ren YF and Du ZQ collected the data; Bi JB analyzed the data; Bi JB wrote the manuscript; Wu RQ supervised the whole research; all authors have read and agreed with the final manuscript.
Supported by the National Natural Science Foundation of China, No. 81770491.
Institutional review board statement: This study was reviewed and approved by the Ethics Committee of the Xi'an Jiaotong University (Permit number: XJTU1AF2015LSL-057).
Informed consent statement: The need for patients’ informed written consent was waived due to the retrospective nature of the study.
Conflict-of-interest statement: All the Authors have no conflict of interest related to the manuscript.
Data sharing statement: The data used to support the findings of this study are available from the corresponding author upon request.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Corresponding author: Rong-Qian Wu, MD, PhD, Professor, National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, First Affiliated Hospital of Xi'an Jiaotong University, No. 76, West Yanta Road, Xi’an 710061, Shaanxi Province, China. rwu001@mail.xjtu.edu.cn
Received: December 30, 2019
Peer-review started: December 30, 2019
First decision: April 12, 2020
Revised: May 10, 2020
Accepted: May 15, 2020
Article in press: May 15, 2020
Published online: July 27, 2020
ARTICLE HIGHLIGHTS
Research background

Postoperative acute kidney injury (AKI) is one of the most common complications after gastrointestinal and hepatobiliary surgery. Neutrophil-to-lymphocyte ratio (NLR) is a marker of inflammation that can be calculated directly from a patient's complete blood count. Extensive studies have shown that NLR can predict the outcome of cardiac surgery, sepsis, and cancer.

Research motivation

The risk factors and early diagnosis of postoperative AKI have always been urgent problems in clinic.

Research objectives

To clarify the relationship between NLR and the occurrence of AKI in patients with gastrointestinal and hepatobiliary surgery in the intensive care unit (ICU).

Research methods

This study retrospectively analyzed the electronic medical records of 282 patients after gastrointestinal and hepatobiliary surgery in ICU to clarify the relationship between NLR at admission and the postoperative AKI occurrence.

Research results

Postoperative AKI occurred in 29.79% of patients receiving ICU care. NLR value at admission was higher in AKI patients compared with the non-AKI patients and increased with the severity of AKI. Patients with NLR ≥ 8.380 exhibited significantly higher incidences of postoperative AKI and severe AKI than patients with NLR < 8.380. The multivariate analysis showed that NLR at admission was an independent risk factor for occurrence of postoperative AKI in patients with gastrointestinal and hepatobiliary surgery in ICU.

Research conclusions

NLR at admission is a predictor of AKI occurrence in patients with gastrointestinal and hepatobiliary surgery in ICU.

Research perspectives

NLR should be included in the routine assessment of AKI occurrence.