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Post-operative delirium in older hip fracture patients: a new onset or was it already there?

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Key summary points

AbstractSection Aim

To investigate if and how the incidence of post-operative delirium is related to the existence of pre-operative delirium and other peri-operative risk factors in older patients undergoing hip fracture surgery.

AbstractSection Findings

Delirium was present more often pre- than post-operatively. The presence of pre- and post-operative delirium increased according to cognitive impairment severity.

AbstractSection Message

Identifying delirium onset is crucial to provide appropriate prevention and management by a multidisciplinary team.

Abstract

Purpose

Hip fractures are a worldwide health issue primarily for older patients, conditioning major morbidity and mortality. An experienced multidisciplinary team is essential to manage surgery and peri-operative implications, to enable rapid functional and cognitive recovery. Delirium is a recognizable problem associated with negative outcomes. Our study aims to determine the influence of pre-operative delirium in the incidence of post-operative delirium, and to evaluate the association between other known peri-operative risk factors with both conditions.

Methods

A single-center, retrospective cohort study, conducted at a Level II trauma center over a 14-month period, included 241 patients with 65 years of age or older submitted to hip fracture surgery. Peri-operative data were gathered regarding baseline characteristics (sociodemographic, functional and cognitive status), intra-operative events (anesthesia technique, surgery duration, blood loss) and post-operative outcomes (delirium occurrence).

Results

Statistical analysis evidenced a female (75.5%) and elderly population (83.9 ± 7.8 years old) with significant comorbidities (cognitive impairment in 51.9%, ASA ≥ III in 79.7%, mean CIRS-G 8.83 ± 4.69) that underwent surgical fracture repair, mostly under 4 h (96.3%) and under regional anesthesia (63.1%). Pre- and post-operative delirium incidence was 18.3% and 12.9%, respectively, displaying increased presence according to cognitive impairment severity.

Conclusion

Post-operative delirium was almost inexistent when it was absent pre-operatively. Moreover, pre-operative cognitive status was associated with the development of pre- and post-operative delirium. Careful cognitive assessment, implementation of preventive strategies and avoidance of peri-operative pro-delirium factors are crucial for comprehensive geriatric care.

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Authors and Affiliations

Authors

Contributions

ICM: conceptualization, methodology, investigation, resources, data curation, writing—original draft, review and editing, visualization, and project administration. JC: conceptualization, methodology, investigation, resources, data curation, writing—original draft, review, and editing. AS: resources, writing—original draft, review, and editing. MCM: formal analysis, resources, writing—original draft, review, and editing. VA: formal analysis, writing—original draft, review, and editing. SD: conceptualization, resources, data curation, writing—review, and editing. LC: writing—review and editing. MC: conceptualization and supervision.

Corresponding author

Correspondence to Isabel Costa-Martins.

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There is no financial arrangement or other relationship that could be construed as a conflict of interest.

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The study complied with the ethical standards of the Human Research Committee and Declaration of Helsinki. The Centro Hospitalar Lisboa Ocidental Research and Ethics Committee approved the study design and waived the requirement for written informed consent due to the observational and retrospective nature of the study.

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For this type of study, informed consent is not required.

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For this type of study, informed consent is not required.

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Data transparency under request.

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Costa-Martins, I., Carreteiro, J., Santos, A. et al. Post-operative delirium in older hip fracture patients: a new onset or was it already there?. Eur Geriatr Med 12, 777–785 (2021). https://doi.org/10.1007/s41999-021-00456-w

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  • DOI: https://doi.org/10.1007/s41999-021-00456-w

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