Preoperative management and postoperative delirium

The global research trends in perioperative cognitive function protection for preventing postoperative delirium: A bibliometric analysis

BACKGROUND AND OBJECTIVES

This study aims to analyze the global trends and current status of perioperative cognitive function protection for preventing postoperative delirium(PCFP-POD), as well as to predict research hotspots.

METHODS

We conducted a literature search on the Web of Science Core Collection (WoSCC) and selected articles published between January 1, 2014, and December 31, 2023, related to PCFP-POD. The retrieved data were subjected to bibliometric analysis and visualization using CiteSpace 6.2.R4, VOSviewer 1.6.20 software, and the Bibliometrics website.

RESULTS

A total of 355 articles published between 2014 and 2023 were retrieved from the online databases. The number of publications on perioperative cognitive function protection for preventing postoperative delirium sharply increased from 2018 onwards. Key themes included drug and non-drug interventions, postoperative cognitive dysfunction in cardiac and hip surgery, and the effects of anesthetic drugs. High-frequency keywords included postoperative delirium, intervention, postoperative cognitive impairment, and cognitive training.

CONCLUSION

The number of research articles on PCFP-POD increased significantly from 2014 to 2023. Future research trends may focus on cognitive function protection related to surgical categories, anesthesia methods, electroencephalogram monitoring, and nursing care.

Perioperative Risk Factors for Postoperative Delirium in Non-dementia Older Patients after Non-cardiac Surgery and Anesthesia: A Prospective Study

BACKGROUND

To investigate the incidence and perioperative risk factors for postoperative delirium (POD) in non-dementia older patients who underwent anesthesia for non-cardiac surgery.

METHODS

This prospective cohort study was conducted on 195 non-dementia older patients, aged 60 years or older, who were hospitalized after non-cardiac surgery and anesthesia. The Confusion Assessment Method for the Intensive Care Unit was used to evaluate the occurrence of POD. Incidence of POD was reported. We conducted univariate and multivariate logistic regression to identify the risk factors associated with POD.

RESULTS

A total of 195 patients were enrolled; 172 completed the study. POD occurred in seven patients within three days after anesthesia, which is a 4.1% incidence of POD. Multivariate logistic analysis showed arrhythmia, coagulopathy, urinary comorbidity, minimum intraoperative heart rate, and minimum post-anesthesia care unit (PACU) pain score as independent risk factors for POD. A minimum PACU pain score >1 is the optimum cutoff pain score for developing POD, with a sensitivity of 85.7% and a specificity of 69.1%. The postoperative complication rate and in-hospital mortality were significantly higher for patients with POD compared to those without POD.

CONCLUSION

The incidence of POD in the study population is 4.1%. Arrhythmia, coagulopathy, urinary comorbidity, minimum intraoperative heart rate, and minimum PACU pain score were independent risk factors for POD. The minimum PACU pain score is the strongest independent risk factor of POD. POD is associated with increased postoperative complications and in-hospital mortality rates in non-dementia older patients.

Protective effects of butorphanol in oleic acid-endotoxin "two-hit" induced rat lung injury by suppression of inflammation and apoptosis

Butorphanol is widely used as an anesthetic drug, whether butorphanol could reduce organ injury and protecting lung tissue is unknown. This study explored the effects of butorphanol on ALI and investigated its underlying mechanisms. We established a "two-hit" rat model and "two-hit" cell model to prove our hypothesis. Rats were divided into four groups [control, "two-hit" (OA + LPS), "two-hit" + butorphanol (4 mg/kg and 8 mg/kg) (OA + LPS + B1 and OA + LPS + B2)]. RPMVE cells were divided into four groups [control, "two-hit" (OA + LPS), "two-hit" + butorphanol (4 μM and 8 μM) (OA + LPS + 4 μM and OA + LPS + 8 μM)]. Inflammatory injury was assessed by the histopathology and W/D ratio, inflammatory cytokines, and arterial blood gas analysis. Apoptosis was assessed by Western blotting and flow cytometry. The effect of NF-κB p65 was detected by ELISA. Butorphanol could relieve the "two-hit" induced lung injury, the expression of TNF, IL-1β, IL-6, and improve lung ventilation. In addition, butorphanol decreased Bax and cleaved caspase-3, increased an antiapoptotic protein (Bcl-2), and inhibited the "two-hit" cell apoptosis ratio. Moreover, butorphanol suppressed NF-κB p65 activity in rat lung injury. Our research showed that butorphanol may attenuate "two-hit"-induced lung injury by regulating the activity of NF-κB p65, which may supply more evidence for ALI treatment.

The Management of Postoperative Cognitive Dysfunction in Cirrhotic Patients: An Overview of the Literature

Background and objectives: Postoperative cognitive dysfunction (POCD) represents a decreased cognitive performance in patients undergoing general anesthesia for major surgery. Since liver cirrhosis is associated with high mortality and morbidity rates, cirrhotic patients also assemble many risk factors for POCD. Therefore, preserving cognition after major surgery is a priority, especially in this group of patients. The purpose of this review is to summarize the current knowledge regarding the effectiveness of perioperative therapeutic strategies in terms of cognitive dysfunction reduction. Data Collection: Using medical search engines such as PubMed, Google Scholar, and Cochrane library, we analyzed articles on topics such as: POCD, perioperative management in patients with cirrhosis, hepatic encephalopathy, general anesthesia in patients with liver cirrhosis, depth of anesthesia, virtual reality in perioperative settings. We included 115 relevant original articles, reviews and meta-analyses, and other article types such as case reports, guidelines, editorials, and medical books. Results: According to the reviewed literature, the predictive capacity of the common clinical tools used to quantify cognitive dysfunction in cirrhotic settings is reduced in perioperative settings; however, novel neuropsychological tools could manage to better identify the subclinical forms of perioperative cognitive impairments in cirrhotic patients. Moreover, patients with preoperative hepatic encephalopathy could benefit from specific preventive strategies aimed to reduce the risk of further neurocognitive deterioration. Intraoperatively, the adequate monitoring of the anesthesia depth, appropriate anesthetics use, and an opioid-sparing technique have shown favorable results in terms of POCD. Early recovery after surgery (ERAS) protocols should be implemented in the postoperative setting. Other pharmacological strategies provided conflicting results in reducing POCD in cirrhotic patients. Conclusions: The perioperative management of the cognitive function of cirrhotic patients is challenging for anesthesia providers, with specific and targeted therapies for POCD still sparse. Therefore, the implementation of preventive strategies appears to remain the optimal attitude. Further research is needed for a better understanding of POCD, especially in cirrhotic patients.

Implications of the COVID-19 pandemic: Virtual nursing education for delirium care

BACKGROUND

Technology is increasingly used in nursing education, particularly during the SARS-CoV-2 (COVID-19) pandemic. COVID-19 also brought new challenges to patient care and limited access to in-person clinical experiences for nursing students. Pivoting to virtual simulation (VS) for clinical was necessary during the height of the pandemic. With students' return to clinical settings, VS experiences continue to be needed, due to quarantine of clinical settings and/or shortage of available clinical sites. VS clinical experiences have been successfully utilized over the past decade; however, the literature lacks resources on the use of VS for delirium care of patients.

METHOD

In this article, the authors describe the creation and provision of a VS clinical day using interactive computer-based technology to educate nursing students to prevent, recognize, and manage delirium. The VS clinical was in conjunction with a Behavioral Health course.

RESULTS

Evaluation of students demonstrated attainment of objectives. Students reported satisfaction with the VS experience.

CONCLUSION

Technology in nursing education and use of VS clinical provide effective strategies for clinical learning when in-person clinical experiences are unavailable, either due to access limitations or lack of patients with specific health needs.

Higher neutrophil-to-lymphocyte ratio, mean platelet volume, and platelet distribution width are associated with postoperative delirium in patients undergoing esophagectomy: a retrospective observational study

PURPOSE

We investigated whether preoperative inflammatory markers, i.e., the neutrophil-lymphocyte ratio (NLR), platelet-lymphocyte ratio (PLR), mean platelet volume (MPV), and platelet distribution width (PDW) can predict the development of postoperative delirium (POD) after esophagectomy.

PATIENTS AND METHODS

This single-center, retrospective, observational study included 110 patients who underwent an esophagectomy. We assigned the patients with the Intensive Care Delirium Screening Checklist score ≥ 4 to the POD group. We performed multivariable logistic regression analyses to determine whether the NLR, PLR, MPV, and PDW can be used to predict the development of POD.

RESULTS

The POD group had 20 patients; the non-POD group included the other 90 patients. Although only the preoperative NLR in the POD group was significantly higher than in the non-POD group (3.20 [2.52-4.30] vs. 2.05 [1.45-3.02], p = 0.001), multivariable logistic regression analyses showed that the following three parameters were independent predictors of POD: preoperative NLR ≥ 2.45 (adjusted odds ratio [aOR]: 8.68, 95%CI 2.33-32.4, p = 0.001), MPV ≥ 10.4 (aOR: 3.93, 95%CI: 1.37-11.2, p = 0.011), and PDW ≥ 11.8 (aOR: 3.58, 95%CI: 1.22-10.5, p = 0.020).

CONCLUSION

Our analysis results demonstrated that preoperative NLR ≥ 2.45, MPV ≥ 10.4, and PDW ≥ 11.8 were significantly associated with a higher risk of POD after adjustment for possible confounding factors. However, as the AUCs of the preoperative MPV and PDW for the prediction of the development of POD in univariable ROC analyses were low, large prospective studies are needed to confirm this result.

Managing surgical patients with a COVID-19 infection in the operating room: An experience from Indonesia

Background

The Coronavirus and the COVID-19 pandemic in 2020 have significantly impacted hospital care, including surgery practice. Hospitals must balance patient care, staff safety, resource availability, and medical ethics. Differences in community infection trends, national policies, availability of resources and technology, plus local circumstances may make uniform management impossible globally. This paper described the practical workflow of emergency COVID-19 surgery in a tertiary referral national hospital in Indonesia.

Method

This study focused on the process of preparation for COVID-19 surgery from March 2020-March 2021. We also described the available facilities in terms of equipment and human resources.

Results

Steps of COVID-19 surgery preparations were described, such as the setup of general and infectious triage in the emergency department, development of preoperative screening protocol for COVID-19, designation of a specialized COVID-19 operating room and surgical staff, changes in preoperative surgery and anesthesia workflow, development of checklists and postoperative monitoring on staff health.

Conclusions

Changes in the workflow are essential during the pandemic for safe surgery. These changes require a multidisciplinary approach, communication, and a continued willingness to adapt. We recommend local adaptation of our general workflow for emergency surgery during an epidemic or pandemic.

Mucus production stimulated by IFN-AhR signaling triggers hypoxia of COVID-19

Silent hypoxia has emerged as a unique feature of coronavirus disease 2019 (COVID-19). In this study, we show that mucins are accumulated in the bronchoalveolar lavage fluid (BALF) of COVID-19 patients and are upregulated in the lungs of severe respiratory syndrome coronavirus 2 (SARS-CoV-2)-infected mice and macaques. We find that induction of either interferon (IFN)-β or IFN-γ upon SARS-CoV-2 infection results in activation of aryl hydrocarbon receptor (AhR) signaling through an IDO-Kyn-dependent pathway, leading to transcriptional upregulation of the expression of mucins, both the secreted and membrane-bound, in alveolar epithelial cells. Consequently, accumulated alveolar mucus affects the blood-gas barrier, thus inducing hypoxia and diminishing lung capacity, which can be reversed by blocking AhR activity. These findings potentially explain the silent hypoxia formation in COVID-19 patients, and suggest a possible intervention strategy by targeting the AhR pathway.

A Protocol for Safe Head and Neck Reconstructive Surgery in the COVID-19 Pandemic

The COVID-19 pandemic has had significant implications for citizens globally and for the healthcare system, including plastic surgeons. Operations of the upper aerodigestive tract, including head and neck reconstruction and craniomaxillofacial procedures, are of particularly high risk because they may aerosolize the virus and lead to severe surgeon and surgical team illness. Until the virus is eradicated or widespread vaccination occurs, we recommend certain precautions to safely perform these operations. We propose evolving algorithms for head and neck reconstruction and facial trauma surgeries to maintain provider safety. Central to these guidelines are preoperative COVID-19 testing, appropriate personal protective equipment, and operative techniques/principles that minimize operative time and aerosolization of the virus. We aim to provide efficient care to our patients throughout this pandemic, while maintaining the safety of plastic surgeons and other healthcare providers.

Extent of infectious SARS-CoV-2 aerosolisation as a result of oesophagogastroduodenoscopy or colonoscopy

BACKGROUND

COVID-19 has caused an unprecedented pandemic and medical emergency that has changed routine care pathways. This article discusses the extent of aerosolisation of severe acute respiratory syndrome coronavirus 2, the virus that causes COVID-19, as a result of oesophagogastroduodenoscopy and colonoscopy.

METHODS

PubMed and Google Scholar were searched for relevant publications, using the terms COVID-19 aerosolisation, COVID-19 infection, COVID-19 transmission, COVID-19 pandemic, COVID-19 and endoscopy, Endoscopy for COVID-19 patients.

RESULTS

A total of 3745 articles were identified, 26 of which were selected to answer the question of the extent of SARS-CoV-2 aerosolisation during upper and lower gastrointestinal endoscopy. All studies suggested high infectivity from contact and droplet spread. No clinical study has yet reported the viral load in the aerosol and therefore the infective dose has not been accurately determined. However, aerosol-generating procedures are potentially risky and full personal protective equipment should be used.

CONCLUSIONS

As it is a highly infectious disease, clinicians treating patients with COVID-19 require effective personal protective equipment. The main routes of infection are direct contact and droplets in the air and on surfaces. Aerosolisation carries a substantial risk of infection, so any aerosol-producing procedure, such as endoscopy, should be performed wearing personal protective equipment and with extra caution to protect the endoscopist, staff and patients from cross-infection via the respiratory system.