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. 2025 Apr 27;15(4):e088092.
doi: 10.1136/bmjopen-2024-088092.

Effect of noise isolation on postoperative delirium in elderly patients undergoing hip surgery: protocol for a randomised controlled trial

Chun Yang #  1   2 , Min-Yuan Zhuang #  1   2 , Xian Chen #  1   2 , Xiao-Feng Shui  1   3 , Hui-Ping Peng  1   2 , Jing-Hui Hu  1   2 , Hong Liu  4 , Fu-Hai Ji  1   2 , Ke Peng  5   2
Affiliations

Effect of noise isolation on postoperative delirium in elderly patients undergoing hip surgery: protocol for a randomised controlled trial

Chun Yang et al. BMJ Open. .

Abstract

Introduction: Postoperative delirium (POD) is a frequent complication in elderly surgical patients, leading to increased morbidity and mortality. Previous studies have shown that noise isolation is associated with a reduced incidence of delirium in the intensive care unit (ICU). This trial aims to evaluate the impact of noise isolation using noise-cancelling headphones on the incidence of POD in elderly patients undergoing hip surgery.

Methods and analysis: In this randomised controlled trial, a total of 320 elderly patients will be randomised to a noise isolation group or a control group, in a 1:1 ratio and stratified by age (65‒80 years or >80 years), type of surgery (fracture or non-fracture) and planned ICU admission (yes or no). For patients in the noise isolation group, noise-cancelling headphones will be used throughout anaesthesia and in the postoperative care unit or ICU. Patients in the control group will be routinely managed and exposed to the clinical environment. The primary outcome is the incidence of POD during 0‒7 days after surgery or before hospital discharge, assessed using the 3 min Confusion Assessment Method or the Confusion Assessment Method for the Intensive Care Unit. The secondary outcomes include postoperative pain at 6, 24 and 48 hours after surgery; sleep quality on the first and second nights after surgery; incidence of nausea and vomiting within 48 hours postoperatively; and cognitive function and mortality at 30 days after surgery.

Ethics and dissemination: The trial was approved by the Ethics Committee of the First Affiliated Hospital of Soochow University (Approval No. 2024-054). The results of this trial will be submitted for peer review and publication in a scientific journal.

Trial registration number: Chinese Clinical Trial Registry (ChiCTR2400082211).

Keywords: Hip; Orthopaedic & trauma surgery; Postoperative Delirium; Randomized Controlled Trial.

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Conflict of interest statement

Competing interests: None declared.

Figures

Figure 1
Figure 1. Study flowchart.
See this image and copyright information in PMC

References

    1. Punjasawadwong Y, Chau-In W, Laopaiboon M, et al. Processed electroencephalogram and evoked potential techniques for amelioration of postoperative delirium and cognitive dysfunction following non-cardiac and non-neurosurgical procedures in adults. Cochrane Database Syst Rev. 2018;5:CD011283. doi: 10.1002/14651858.CD011283.pub2. - DOI - PMC - PubMed
    1. Mattison MLP. Delirium. Ann Intern Med. 2020;173:ITC49–64. doi: 10.7326/AITC202010060. - DOI - PubMed
    1. Oberai T, Oosterhoff JHF, Woodman R, et al. Development of a postoperative delirium risk scoring tool using data from the Australian and New Zealand Hip Fracture Registry: an analysis of 6672 patients 2017-2018. Arch Gerontol Geriatr. 2021;94:104368. doi: 10.1016/j.archger.2021.104368. - DOI - PubMed
    1. Marcantonio ER. Postoperative delirium: a 76-year-old woman with delirium following surgery. JAMA. 2012;308:73–81. doi: 10.1001/jama.2012.6857. - DOI - PMC - PubMed
    1. Marcantonio ER. Delirium in Hospitalized Older Adults. N Engl J Med. 2017;377:1456–66. doi: 10.1056/NEJMcp1605501. - DOI - PMC - PubMed

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