Delirium in mechanically ventilated patients: validity and reliability of the confusion assessment method for the intensive care unit (CAM-ICU)

The frequency of sepsis-associated delirium in intensive care unit and its effect on nurse workload

AIM

To determine the frequency of sepsis-associated delirium (SAD) in the intensive care unit and its effect on nurse workload.

DESIGN

A cross-sectional and correlational design was used.

METHODS

The study was conducted with 158 patients in the adult intensive care unit of a hospital between October 28 and July 28, 2022. Data analysis included frequency, chi-squared/fisher's exact test, independent samples t-test, correlation analysis, simple and multiple linear regression analyses. The study adhered to the STROBE guidelines.

RESULTS

Sepsis was detected in 12.7% of the patients, delirium in 39.9%, and SAD in 10.1%. SAD was more common in males (19%) and 56.3% of the patients were admitted to the unit from the emergency department. Patients developing SAD had significantly higher age and mean sequential organ failure evaluation, acute physiology and chronic health evaluation II, and C-reactive protein and lactate scores, but their Glasgow Coma Scale scores were significantly low. There was a moderate positive relationship between the patients' Sequential Organ Failure Assessment score and the presence of SAD. The most common source of infection in patients diagnosed with SAD was bloodstream infection (44.4%). SAD significantly increased nurse workload and average care time (1.8 h) and it explained 22.8% of the total variance in nurse workload. Additionally, the use of antibiotics, vasopressors and invasive mechanical ventilation significantly increased nurse workload.

CONCLUSION

In the study, in patients who developed SAD increased nurse workload and average care time significantly. Preventive nursing approaches and effective management of SAD can reduce the rate of development of SAD and nurse workload.

IMPLICATIONS FOR THE PROFESSION AND PATIENT CARE

It is important to work with routine screening, prevention and patient-nurse ratio appropriate to the workload for SAD.

Mobility Loss in Hospitalized Adults Predicts Poor Clinical Outcomes

BACKGROUND

The Johns Hopkins Activity and Mobility Program is a systematic approach to measure and improve patient mobility.

PURPOSE

The purpose of this study was to evaluate the relationship between mobility loss and quality outcomes.

METHODS

A retrospective cohort study design was used. Patients were categorized into 3 groups (gain, loss, no change in mobility) using the Johns Hopkins Highest Level of Mobility (JH-HLM) scores. The association between mobility loss and falls risk, in-hospital mortality, delirium, discharge to a facility, length of stay, and 30 day readmissions were assessed.

RESULTS

Those who lost mobility were more at risk of being a high fall risk, in-hospital mortality, delirium, discharging to a facility, and had 48% longer lengths of stay. There was no association between mobility loss and 30-day readmissions.

CONCLUSIONS

Loss of mobility assessed using JH-HLM scores is associated with worse patient outcomes.

Occupational Therapy Practitioners' Perceptions on Addressing Cognition in Acute Care: A National Survey

This study aimed to identify commonly used standardized cognitive screens and functional performance assessments among occupational therapy practitioners at level 1 trauma centers in the USA. A survey completed by 269 occupational therapy practitioners revealed the most common cognitive screens and the association between cognitive tool training and standardized cognitive tool implementation. Implications for practice are discussed with suggestions for improving occupational therapy practice.

An Explanatory Mixed-Methods Study of Intensive Care Unit Net Benefit: Triage and Trajectory for Sepsis and Acute Respiratory Failure

Rationale: Patients with sepsis and/or acute respiratory failure are at high risk for death or long hospital stays, yet limited evidence exists to guide triage to intensive care units (ICUs) or general medical wards for the majority of these patients who do not initially require life support. Objectives: To identify factors that influence how hospitals triage patients with capacity-sensitive conditions and those factors that may account for observed ICU relative to ward, or ward relative to ICU, benefits for such patients. Methods: We conducted an explanatory sequential mixed-methods study. As part of a 27-hospital, two-health system retrospective cohort study, we calculated hospital-specific measurements of ICU net benefit for patients with sepsis and/or acute respiratory failure. Hospitals among the highest ICU net benefit and lowest ICU net benefit (or highest ward net benefit) from each study health system were selected for in-depth qualitative study. At each hospital, interviews were conducted with emergency department, ward, and ICU clinicians and administrators. Interview transcripts were analyzed using flexible coding and the framework method. Results: Interviews were conducted with 118 respondents (46 physicians, 43 nurses, 5 advanced practice providers, and 24 administrators) from four hospitals. Respondents across hospitals agreed that the prediction of patient trajectory is central to triage decisions, but there was variation in opinion across work locations about optimal pretriage emergency department interventions in terms of intensity, repetition, clinical reassessment, and observation duration. The main difference observed between high and low ICU net benefit hospitals related to the way respondents working in the ICU and ward described their responses to patients who experience rapid clinical deviations from triage-expected trajectories, including sustained lack of critical care needs after admission to the ICU and acute critical care needs after admission to the ward. Hospitals with low ICU net benefit (or high ward net benefit) had particularly robust and proactive rapid response and clinical decompensation surveillance practices for ward-admitted patients. Conclusions: Particularly proactive rapid response programs that deliver on-location critical care may quantitatively increase ward net benefit by bringing ICU benefits without ICU-associated harms to ward patients who become critically ill.

Feasibility of Endoscopic Evaluations of Laryngeal Function After Extubation for Research in Critically Ill Adults

PURPOSE

Flexible nasal laryngoscopy (FNL) is commonly used in intensive care units (ICUs) to assess laryngeal anatomy and function after endotracheal intubation. The use of FNL in research may differ from clinical practice due to requirements of research protocols and related data collection and documentation. This study evaluates the feasibility of performing FNL post-extubation in critically ill adults within the context of a research protocol. Understanding the feasibility of this reference standard assessment is important for supporting future studies and improving patient care.

METHOD

This prospective study, conducted in six ICUs within a single academic medical center, consecutively enrolled adult patients who required mechanical ventilation for at least 8 hr. The primary feasibility outcome was the successful completion of FNL within 72 hr of extubation. Secondary outcomes included completion of the 3-oz water swallow test (Yale Swallow Protocol) during the FNL, patient enrollment/exclusion/withdrawal rates, time from extubation to FNL, procedure duration, and patient-reported pain (using the Wong-Baker FACES Pain Rating Scale).

RESULTS

A total of 80 patients (75%) of 107 eligible patients fully completed FNL. Among the 24 patients who did not receive FNL, eight died, seven were medically inappropriate, and seven declined FNL. The median time from extubation to FNL was 10 hr (IQR [interquartile range]: 8-12 hr), and the median FNL procedure duration was 8.5 min (IQR: 5.8-12.9 min). The median (IQR) pain score was 2 (0, 4) of 10, reflecting only mild discomfort.

CONCLUSION

Post-extubation FNL is feasible within the context of a research protocol and well tolerated by critically ill adults.

Management of severe acute encephalopathy in the ICU: an expert consensus statement from the french society of intensive care medicine

INTRODUCTION

Acute encephalopathy in the ICU poses significant diagnostic, therapeutic, and prognostic challenges. Standardized expert guidelines on acute encephalopathy are needed to improve diagnostic methods, therapeutic decisions, and prognostication.

METHODS

The experts conducted a review of the literature, analysed it according to the GRADE (Grading of Recommendation, Assessment, Development and Evaluation) methodology and made proposals for guidelines, which were rated by other experts. Only expert opinions with strong agreement were selected.

RESULTS

The synthesis of expert work and the application of the GRADE method resulted in 39 recommendations. Among the 39 formalized recommendations, 1 had a high level of evidence (GRADE 1 +) and 10 had a low level of evidence (GRADE 2 + or 2-). These recommendations describe indication for ICU admission, use of clinical scores and EEG for diagnosis, detection of complications, and prognostication. The remaining 28 recommendations were based on expert consensus. These recomandations describe common indications for blood and CSF studies, neuroimaging, use of neuromonitoring, and provide guidelines for management in the acute phase.

CONCLUSION

This expert consensus statement aims to provide a structured framework to enhance the consistency and quality of care for ICU patients presenting with acute encephalopathy. By integrating high-quality evidence with expert opinion, it offers a pragmatic approach to addressing the complex nature of acute encephalopathy in the ICU, promoting best practices in patient care and facilitating future research in the field.

Haloperidol in treating delirium, reducing mortality, and preventing delirium occurrence: Bayesian and frequentist meta-analyses

BACKGROUND

Although haloperidol is commonly used to treat or prevent delirium in intensive care unit (ICU) patients, the evidence remains inconclusive. This study aimed to comprehensively evaluate the efficacy and safety of haloperidol for delirium treatment and prevention in ICU patients.

METHODS

We searched MEDLINE, the cochrane central register of controlled trials, EMBASE, ClinicalTrial.gov, and PubMed without language restrictions from database inception to June 27, 2024. We included double-blind randomized controlled trials (RCTs) on haloperidol versus placebo for treating and preventing delirium in adult ICU patients. In addition to frequentist analyses, Bayesian analysis was used to calculate the posterior probabilities of any benefit/harm and clinically important benefit/harm (CIB/CIH). The primary outcomes for delirium treatment were all-cause mortality and serious adverse events (SAEs). For delirium prevention, the primary outcomes included incident delirium, all-cause mortality, and SAEs. The secondary outcomes for efficacy were delirium-or coma-free days, ventilator-free days, length of stay in ICU, length of stay in hospital, and rescue benzodiazepine use. The secondary outcomes for safety were QTc prolongation and extrapyramidal syndrome.

RESULTS

We included seven RCTs on delirium treatment (n = 1767) and five on delirium prevention (n = 2509). The Bayesian analysis showed that, compared to placebo for delirium treatment, haloperidol had a 68% probability of achieving CIB (defined as risk difference [RD] < -0.02) in reducing all-cause mortality, a 2% probability of achieving CIH (RD > 0.02) in causing SAEs, and a 78% probability of achieving CIB (RD < -0.02) in reducing the need for rescue benzodiazepine use. The probabilities of haloperidol causing CIH (RD > 0.02) across all other safety outcomes were low (all < 50%). In frequentist analysis on delirium treatment, the pooled estimated RD for haloperidol compared to placebo was -0.05 (-0.09, -0.00; I2 = 0%) for rescue benzodiazepine use. In Bayesian analysis on delirium prevention, haloperidol had a 12% probability of achieving CIB in all-cause mortality, a 34% probability of achieving CIB in delirium incidence, and a 0% probability of achieving CIB in SAEs. Importantly, haloperidol had a 65% probability of causing CIH (risk ratio > 1.1) for QTc prolongation, while the posterior probabilities of achieving CIB across all efficacy outcomes were low (all < 50%). In frequentist analysis on delirium prevention, all primary and secondary outcomes were not statistically significant in frequentist analysis.

CONCLUSION

Our study supported the use of haloperidol for delirium treatment in adult ICU patients, but not for delirium prevention.

Prospective cohort study on characteristics, associated factors and short-term prognosis of sleep and circadian rhythm in intensive care unit: protocol for the SYNC study

INTRODUCTION

Acute sleep and circadian rhythm (SCR) disruption can lead to a range of negative physical and mental consequences, such as depression, delirium, respiratory dysfunction and increased mortality. In the intensive care unit (ICU), the unique environment can exacerbate disruptions in SCR. Few studies have identified the characteristics of SCR in the ICU, and the roles of patient characteristics, illness and medical interventions in ICU SCR remain unclear. A single-centre prospective cohort study, called SYNC study (Sleep and circadian rhYthm in iNtensive Care unit), will be conducted to explore the characteristics and associated factors of SCR and investigate the short-term prognosis among patients in the surgical ICU.

METHODS AND ANALYSIS

Patients from a surgical ICU at a tertiary teaching hospital will be enrolled. SCR will be assessed by both objective and subjective indicators, including melatonin secretion rhythm, activity rhythm, sleep pattern and perceived sleep quality. Data on eight potential factors that influence SCR, including light exposure, noise level, pain level, nighttime disturbances, mechanical ventilation, sedative and analgesic use, meal pattern and restraints, will be collected. These data will be gathered in the first 3 days after ICU admission. Short-term prognostic indicators, including anxiety, depression, cognitive function, insomnia, activities of daily living, ICU stay, hospital stay and hospital mortality will be collected during the hospital stay and at 1 month after discharge.

ETHICS AND DISSEMINATION

The study has been approved by the Ethics Committee of Zhongshan Hospital, Fudan University (B2024-076R). The results of this study will be published in peer-reviewed journals.

TRIAL REGISTRATION NUMBER

NCT06346613.

Reliability and validity of the Chinese version of the functional status score for the ICU (FSS-ICU) after translation and cross-cultural adaptation

PURPOSE

The Functional Status Score for the Intensive Care Unit (FSS-ICU) is designed to assess the physical functional status of patients in ICU settings. This study aimed to translate and culturally adapt the FSS-ICU for the Chinese context and to evaluate its reliability and validity.

METHODS

Following Beaton's translation model, the original FSS-ICU was subjected to forward translation, back-translation, and synthesis. After cultural adaptation and preliminary testing, the Chinese version of the FSS-ICU was established, and then two rehabilitation therapists assessed the functional status of 51 ICU patients using this scale, evaluating its reliability and validity.

RESULTS

The Chinese version of the FSS-ICU exhibits excellent internal consistency with a Cronbach's alpha coefficient of 0.934. The inter-rater and intra-rater correlation coefficients are 0.995 and 0.997, respectively. Both item-level and scale-level content validity indices are 1.00. The FSS-ICU demonstrates good convergent validity with other physical function assessment tools (Medical Research Council Sum-Score, grip strength, the Intensive Care Unit Mobility Scale), with |rs| values all above 0.5, and satisfactory discriminant validity with non-physical function assessment indicators (body mass index, blood glucose), with |rs| values all below 0.2. Additionally, it demonstrated no ceiling or floor effects.

CONCLUSION

The Chinese FSS-ICU, demonstrating strong reliability and validity, can serve as an effective assessment tool for physical function in ICU patients.

Covert Perioperative Strokes in Older Patients Having Noncardiac Surgery (PRECISION): A Prospective Cohort Analysis

BACKGROUND

Perioperative strokes may promote postoperative neurocognitive dysfunction. This study thus evaluated the incidence of postoperative strokes and the association between strokes and postoperative neurocognitive outcomes in older patients recovering from noncardiac surgery.

METHODS

The Postoperative Covert Stroke and Cognitive Dysfunction among Elderly Patients Undergoing Noncardiac Surgery study (PRECISION) was a two-center prospective cohort study evaluating patients aged 60 yr or older who had elective, noncardiac inpatient surgery at two Chinese academic centers. Postoperative strokes were evaluated by scheduled magnetic resonance brain imaging within 7 days. The primary outcome was the cumulative incidence of postoperative stroke. Secondary outcomes included postoperative delirium within the first 5 days after surgery, neurocognitive decline at 12 months, and the association between stroke and neurocognitive dysfunction.

RESULTS

Among 934 patients (mean age, 67 yr; 45% male) included in the analyses, two thirds had neurosurgical craniotomies. There were 111 (11.9%; 95% CI, 9.8 to 14.0%) covert strokes within 7 days after surgery and no overt strokes. Postoperative delirium was observed in 117 patients (12.5%; 95% CI, 10.4 to 14.7%) within 5 days, and neurocognitive decline was observed in 147 patients (18.8%; 95% CI, 16.0 to 21.5%) at 1 yr after surgery. Postoperative covert strokes were significantly associated with delirium (adjusted odds ratio, 2.18; 95% CI, 1.31 to 3.62; P = 0.003) and 1-yr neurocognitive decline (adjusted odds ratio, 2.33; 95% CI, 1.31 to 4.13; P = 0.004) in overall participants.

CONCLUSIONS

Among patients aged 60 yr and older who had major noncardiac surgery, mainly intracranial, one in nine patients experienced a perioperative covert stroke. Covert strokes more than doubled the risk of postoperative delirium and long-term neurocognitive decline. Covert perioperative strokes are common and clinically meaningful.

Effects of temperature on transient neurologic dysfunction after total arch replacement

OBJECTIVES

The relationship between cooling status during aortic surgery with hypothermic circulatory arrest and postoperative neurologic dysfunction remains unknown. In the present study, we evaluated the effect of cooling status on transient neurologic dysfunction after total arch replacement.

METHODS

We studied patients who underwent elective total arch replacement with hypothermic circulatory arrest and antegrade selective cerebral perfusion from December 2011 to January 2021. Changes in tympanic temperature trends recorded during surgery were plotted. Several parameters, including the nadir temperature, cooling speed, and degree of cooling (cooling area, or the area under the curve of inverted temperature trends from cooling to rewarming as calculated by the integral method), were analyzed. The relationships between these variables and transient neurologic dysfunction were evaluated.

RESULTS

Transient neurologic dysfunction was observed in 33 (14.5%) of the 228 included patients. In the transient neurologic dysfunction group, the cooling area was larger (2417.3 vs. 1920.8 °C min; P < 0.001) and the cooling speed was higher (0.68 vs. 0.51 °C/min; P < 0.001) than in the non-transient neurologic dysfunction group. A multivariate logistic model revealed that both the cooling area (odds ratio = 1.13 per 100 °C min; P < 0.001) and cooling speed (odds ratio = 3.69 per °C/min; P = 0.041) were independent risk factors for transient neurologic dysfunction.

CONCLUSIONS

Both the cooling area, which indicates the degree of cooling, and cooling speed had significant relationships with transient neurologic dysfunction after total arch replacement. Together, these findings indicate that overcooling and rapid cooling may contribute to brain injury.

Cardiac surgery outcomes: The efficacy of dexmedetomidine in reducing postoperative delirium - A bibliometric study

Postoperative delirium (POD) is a prevalent complication following cardiac surgery, characterized by acute brain dysfunction observed in critically ill patients. Despite the significant impact of POD, there is currently no established treatment. Recent research has suggested that modulation of cholinergic neurotransmission and α2-adrenergic receptors may offer a therapeutic strategy for managing delirium during critical illness. This study employs bibliometric analysis to examine the emerging evidence on the role of dexmedetomidine, an α2-receptor agonist drug, in the prevention and treatment of POD. A systematic bibliometric analysis was conducted to identify and evaluate the literature on the use of dexmedetomidine in relation to POD. The study period spanned from 2006 to 2022, and the search was conducted in the Web of Science (WOS) database, focusing on relevant references. The analysis included the examination of the most frequent keywords, research trends, and frontiers to provide a comprehensive overview of the field. The bibliometric analysis revealed 160 research papers on the topic, indicating a significant increase in research output over the past decades. The field distribution, knowledge structure, and research topic evolution were identified as key areas of exploration. The analysis also highlighted the emergence of new topics and trends in the study of POD and its management. This bibliometric analysis provides a robust framework for understanding the current state of research on dexmedetomidine's efficacy in managing POD. It highlights the need for continued investigation and underscores the potential of this pharmacological approach to improve patient outcomes following cardiac surgery.

Validation of the Nociception Level Index for the Detection of Nociception and Pain in Critically Ill Adults: Protocol for an Observational Study

BACKGROUND

In the intensive care unit (ICU), many patients are unable to communicate their pain through self-reporting or behaviors due to their critical care condition, mechanical ventilation, and medication (eg, heavily sedated or chemically paralyzed). Therefore, alternative pain assessment methods are urgently needed for this vulnerable patient population. The Nociception Level (NOL) index is a multiparameter technology initially developed for the monitoring of nociception and related pain in anesthetized patients, and its use in the ICU is new.

OBJECTIVE

This study aims to validate the NOL for the assessment of nociception and related pain in critically ill adults in the ICU. Specific objectives are to examine the ability of the NOL to: (1) detect pain using standard criteria (ie, self-report and behavioral measures), (2) discriminate between nociceptive and nonnociceptive procedures, and (3) generate consistent values when patients are at rest.

METHODS

The NOL will be monitored in three ICU patient groups: (1) Group A, participants able to self-report their pain (the reference standard criterion using the 0-10 Faces Pain Thermometer) and express behaviors; (2) Group B, participants unable to self-report but able to express behaviors (the alternative standard criterion using the Critical-Care Pain Observation Tool); and (3) Group C, participants unable to self-report and express behaviors. The NOL will be tested before, during, and after two types of standard care procedures: (1) nonnociceptive (eg, cuff inflation to measure blood pressure, soft touch) and (2) nociceptive (eg, tube or drain removal, endotracheal or tracheal suctioning). Receiver operating characteristic curve analysis of the NOL will be performed for Groups A and B using pain standard measures as reference criteria. Mixed linear models for repeated measures will be used to compare time points, procedures, and their interaction in each group (A, B, and C). Based on power analyses and considering an attrition rate of 25%, a total sample size of 146 patients (68 in Group A, 62 in Group B, and 16 in Group C) is targeted.

RESULTS

This study was funded in April 2020 but could not be launched until 2022 due to the COVID-19 pandemic. Recruitment and data collection began at the primary site in July 2022 and has been implemented at the secondary sites in 2023 and 2024 and is planned to continue until 2026.

CONCLUSIONS

The primary strength of this study protocol is that it is based on rigorous validation strategies with the use of pain standard criteria (ie, self-report and behavioral measures). If found to be valid, the NOL could be used as an alternative physiologic measure of pain in critically ill adults for whom no other pain assessment methods are available.

TRIAL REGISTRATION

ClinicalTrials.gov NCT05339737; https://clinicaltrials.gov/study/NCT05339737.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/60672.

Frailty as an independent risk factor for sepsis-associated delirium: a cohort study of 11,740 older adult ICU patients

BACKGROUND

Sepsis-associated delirium (SAD) is a common complication in intensive care unit (ICU) patients and is associated with increased mortality. Frailty, characterized by diminished physiological reserves, may influence the development of SAD, but this relationship remains poorly understood.

AIMS

To comprehensively analyze the assessment of frailty as a predictive factor for sepsis-associated delirium in older adults.

METHODS

A retrospective cohort analysis was performed on sepsis patients aged ≥ 65 years admitted to the ICU. Frailty was assessed using the Modified Frailty Index based on 11 items including comorbidities and functional status. Patients were categorized into non-frail (MFI: 0-2) and frail (MFI ≥ 3) groups. Delirium was assessed using the ICU Confusion Assessment Method (CAM-ICU) and retrospective nursing notes. Logistic regression analysis was used to examine the relationship between frailty in older patients and the risk of delirium, and odds ratios (OR) and their 95% confidence intervals (CI) were calculated.

RESULTS

Among 11,740 patients (median age approximately 76 years [interquartile range: 70.47-83.14], 44.3% female), frail patients tended to have longer ICU stays, higher severity scores, and potentially worse clinical outcomes. The study found a significant positive association between MFI and the risk of developing SAD (OR: 1.13, 95% CI: 1.09-1.17, p < 0.001). Additionally, frail patients had a higher risk of developing SAD compared to non-frail patients (OR: 1.31, 95% CI: 1.20-1.43, p < 0.001).

CONCLUSIONS

Frailty independently predicts SAD development in older adults with sepsis in the ICU, emphasizing the importance of early recognition and prevention.

Effectiveness of perioperative remimazolam in preventing postoperative delirium: a systematic review and meta-analysis

BACKGROUND

To compare the POD rates in patients undergoing non-cardiac surgery who received remimazolam perioperatively versus placebo or other sedatives.

METHODS

We systematically searched four major databases (Cochrane Central Register of Controlled Trials, Web of Science, Embase, and PubMed) for relevant randomized controlled trials (RCTs) up to July 11, 2024. Literature quality evaluation was used the bias risk table in Review Manager 5.4. The primary outcome of interest was POD, and secondary outcomes were the hypotension risk, bradycardia and, nausea and vomiting.

RESULTS

Across 11 trials involving 1985 participants, we recorded 309 cases of POD during follow-up. In trials where the control group received saline, remimazolam decrease the risk of POD significantly by 70% (RR 0.30, 95% CI [0.19, 0.46]; p < 0.00001). Statistical analysis did not show significant difference in the risk of POD between the remimazolam group and the groups receiving either dexmedetomidine (RR 1.23 [0.64, 2.37]; p = 0.53) or propofol (RR 0.83 [0.60, 1.16]; p = 0.28). Regarding adverse events, remimazolam significantly reduces the morbidity of hypotension compared to dexmedetomidine (RR 0.25 [0.10, 0.65]; p = 0.004) and propofol (RR 0.45 [0.33, 0.60]; p < 0.00001). In addition, there were no significant differences in the incidence of bradycardia (RR 0.85; 95% CI [0.34-2.12], p = 0.72) and nausea and vomiting (RR 1.06; 95% CI [0.74-1.51], p = 0.77) between remimazolam and the control group.

CONCLUSIONS

During the perioperative period, using remimazolam can lower POD risk after surgery for patients who had non-cardiac surgery, but remimazolam does not work better than dexmedetomidine or propofol. Compared with the dexmedetomidine and propofol, remimazolam also has apparent advantages in preventing intraoperative hypotension.

Melatonin for preventing postoperative delirium in elderly patients: A multicenter randomized placebo-controlled pilot study

BACKGROUND

Postoperative delirium (POD) in older adults is associated with high risk of morbidity and mortality. With limited treatment options, prevention is essential. Melatonin has been suggested to prevent delirium through regulating the sleep-wake cycle and serotonin metabolism, which has been shown to be disrupted in patients with POD. However, the evidence regarding the use of melatonin for POD prevention is limited and inconclusive.

METHODS

Our multicenter, 2-arm, parallel-group, feasibility randomized controlled trial evaluated the effect of melatonin on POD incidence after noncardiac surgery in patients >65 years (n = 120). Patients were randomized to 3 mg oral melatonin or placebo once preoperatively and for 7 days postoperatively. Patients were assessed twice daily for delirium and followed at 3 months postoperatively. Feasibility outcomes were recruitment rate, medication adherence, and proportion completing 3-month follow-up. Clinical outcomes were delirium incidence, sleep quality, institutional discharge, and cognitive status at 3 months.

RESULTS

Between September 2021 and June 2023, 85 patients were randomized (~1 patient/wk); of these, 92.9% adhered to study medications and 87.1% completed the 3-month follow-up. POD occurred in 9 patients with no statistical difference between the groups (melatonin group, n = 7; placebo group, n = 2; adjusted odds ratio: 1.12; 95% confidence interval: 0.006-150.1). There were no differences in any other clinical outcomes. Pandemic-related challenges, including interruption of surgeries and restrictions on research procedures impacted feasibility and the study was terminated early due to futility.

CONCLUSIONS

Based on our observations, a sample size of >1000 patients is required for a definitive trial to evaluate the role of melatonin in reducing the incidence of POD. Design changes need to be considered to address feasibility challenges and ongoing post-pandemic modifications to patient care.

Effects of transcutaneous auricular vagus nerve stimulation on postoperative delirium in older patients with hip fracture: protocol for a randomised controlled trial

BACKGROUND

Postoperative delirium (POD) is an acute neurocognitive impairment and is commonly observed in older patients with hip fractures. POD is associated with poor outcomes, including increased postoperative complications, prolonged hospitalisation, high costs and increased perioperative mortality. Therefore, reducing the occurrence of POD and improving cognitive abilities in older patients are critical and urgent. Transcutaneous auricular vagus nerve stimulation (TAVNS) is a simple, safe, non-invasive treatment and has great potential to improve cognitive function. This clinical study will evaluate the effectiveness of TAVNS in reducing the incidence of POD in older patients and further elucidate the possible underlying mechanisms.

METHODS AND ANALYSIS

This randomised, double-blind, single-centre controlled trial will enroll 154 older patients undergoing hip fracture surgery, who will be randomly assigned to the TAVNS group (n=77), receiving TAVNS from 1 hour before anaesthetic induction to the end of the surgery, or the sham stimulation group (n=77), receiving sham stimulation in the same manner. The primary outcome measure will be the incidence of POD during the first 7 days post-surgery, as assessed by the confusion assessment method for the intensive care unit. The secondary outcomes include the incidence of delayed neurocognitive recovery; serum acetylcholinesterase and butyrylcholinesterase levels; the concentrations of tumour necrosis factor-α, interleukin-1β, interleukin-6 and S100β; unplanned intensive care unit admission rates; the length and cost of hospital stay; the incidence of postoperative complications during hospitalisation; and mortality at 1 month, 6 months and 1 year after surgery.

ETHICS AND DISSEMINATION

This study was approved by the Ethics Committee of the Chongqing Traditional Chinese Medicine Hospital on 15 May 2024 (2024-KY-HY-13). The findings will be published in the international peer-reviewed academic journals and presented orally at academic conferences.

TRIAL REGISTRATION NUMBER

ChiCTR2400085508.

Evaluation of the Quality of Delirium Website Content for Patient and Family Education: Cross-Sectional Study

BACKGROUND

Patients and families who have experienced delirium may seek information about delirium online, but the quality and reliability of online delirium-related websites are unknown.

OBJECTIVE

This study aimed to identify and evaluate online delirium-related websites that could be used for patient and family education.

METHODS

We searched Microsoft Bing, Google, and Yahoo using the keywords "delirium" and the misspelled "delerium" to identify delirium-related websites created to inform patients, families, and members of the public about delirium. The quality of identified delirium-related website content was evaluated by 2 authors using the validated DISCERN tool and the JAMA (Journal of the American Medical Association) benchmark criteria. Readability was assessed with the Simple Measure of Gobbledygook, the Flesch Reading Ease score, and the Flesch Kincaid grade level. Each piece of website content was assessed for its delirium-related information using a checklist of items co-designed by a working group, which included patients, families, researchers, and clinicians.

RESULTS

We identified 106 websites targeted toward patients and families, with most hospital-affiliated (21/106, 20%) from commercial websites (20/106, 19%), government-affiliated organizations (19/106, 18%), or from a foundation or advocacy group (16/106, 15%). The median time since the last content update was 3 (IQR 2-5) years. Most websites' content (101/106, 95%) was written at a reading level higher than the recommended grade 6 level. The median DISCERN total score was 42 (IQR 33-50), with scores ranging from 20 (very poor quality) to 78 (excellent quality). The median delirium-related content score was 8 (IQR 6-9), with scores ranging from 1 to 12. Many websites lacked information on the short- and long-term outcomes of delirium as well as how common it is. The median JAMA benchmark score was 1 (IQR 1-3), indicating the quality of the websites' content had poor transparency.

CONCLUSIONS

We identified high-quality websites that could be used to educate patients, families, or the public about delirium. While most delirium-related website content generally meets quality standards based on DISCERN and JAMA benchmark criteria, high scores do not always ensure patient and family-friendliness. Many of the top-rated delirium content were text-heavy and complex in layout, which could be overwhelming for users seeking clear, concise information. Future efforts should prioritize the development of websites with patients and families, considering usability, accessibility, and cultural relevance to ensure they are truly effective for delirium education.

A bibliometric analysis on delirium in intensive care unit from 2013-2023

Background

Delirium is a common manifestation of acute brain dysfunction among patients in the Intensive Care Unit (ICU), afflicting an estimated 30-35% of this vulnerable population. The prevalence of delirium in ICU settings has catalyzed a surge in academic interest, as evidenced by a growing body of literature on the subject. This study seeks to synthesize the progress in understanding ICU delirium through a bibliometric analysis.

Methods

We conducted a comprehensive search of the Web of Science Core (WOS) Collection database for literature on ICU delirium, focusing on studies published between 2013 and 2023. Our analysis utilized two bibliometric software tools, Citespace and VOSviewer, to scrutinize the data across various dimensions, including country contributions, authorship patterns, publishing journals, key thematic terms, and other pertinent metrics, with the aim of identifying emerging trends in the field.

Results

Our search yielded a total of 1,178 publications on ICU delirium within the WOS database from January 2013 to June 2023. The United States emerged as the leading contributor in terms of published articles, with Ely, E. Wesley being the most prolific author, having published 85 articles, and "Critical Care Medicine" as the journal with the highest number of publications, totaling 105. The application of literature clustering and keyword analysis revealed that future research is poised to delve deeper into areas such as pediatric delirium, risk factors, and the development of preventive and therapeutic strategies.

Conclusion

This study employs bibliometric analysis to provide a multifaceted overview of the ICU delirium research landscape over the past decade. By examining the topic from various perspectives, we have not only mapped the current state of ICU delirium research but also illuminated potential avenues for future inquiry and areas of emphasis.

ICU Delirium

Delirium is not a harmless transient event during ICU hospitalization; rather, it is a severe complication of critical illness associated with increased mortality, morbidity, and persistent disability. Despite being recognized for decades, it remains underdiagnosed. Employing validated tools for detection helps reduce missed cases. Early detection facilitates prompt management. Sedatives, opioids, and antipsychotics should be avoided whenever possible. Optimizing environmental triggers, minimizing iatrogenicity, and treating underlying critical illness constitute the basis of the currently recommended approach to diminish the burden of delirium in ICU patients.

Delirium in Neurocritical Care: Uncovering Undisclosed Psychotropic Substance and Medication Use and Stress Exposure by Hair Analysis

OBJECTIVE

In intensive care, delirium is frequent, prolongs the stay, increases health care costs, and worsens patient outcome. Several substances and medications as well as stress can impact the risk of delirium; however, assessment of previous exposure to psychotropic agents and stress by self-reports or third-party information is not always reliable. Hair analysis can be used to objectively assess medication and substance use (including chronic alcohol consumption), and allows for the determination of stress-related long-term changes in steroid hormones and endocannabinoids.

METHODS

Consecutive adult patients with acute brain injury admitted to the neurocritical care unit were included. Delirium was diagnosed using the Confusion Assessment Method for the Intensive Care Unit. Liquid chromatography coupled with tandem mass spectrometry was used to investigate psychoactive substances and medications, ethyl glucuronide, steroid hormones, and endocannabinoids in hair samples. Univariable and multivariable analyses were used to reveal any associations with the occurrence of delirium.

RESULTS

Of 50 consecutive patients, 21 (42%) were diagnosed with delirium. Detection of antipsychotics or antidepressants in hair was more frequent in patients with delirium (antidepressants: 43% vs. 14%, p = 0.040; antipsychotics: 29% vs. 0%, p = 0.021). These patients also displayed higher ethyl glucuronide levels (p = 0.049). Anandamide (AEA) concentrations were higher in patients with delirium (p = 0.005), whereas oleoylethanolamide (p = 0.045) and palmitoylethanolamide (PEA) (p = 0.017) concentrations were lower in patients with delirium. Backward stepwise logistic regression analysis revealed antidepressants and AEA/PEA to be independent relevant predictors of delirium.

CONCLUSIONS

Hair analysis provides crucial and otherwise unattainable information regarding chronic stress and the use of psychotropic substances and medications. Undisclosed antidepressant/antipsychotic use or intense chronic alcohol consumption is susceptible to treatment (continuation of medication or provision of low-dose benzodiazepines in case of alcohol). Chronic stress can be evaluated using stress markers and endocannabinoids in hair, potentially allowing for personalized delirium risk stratification and preventive measures.

Association of post-stroke delirium with short-term trajectories of cognition

BACKGROUND

Delirium could increase the risk of cognitive decline. We aimed to determine if changes in cognitive functions shortly after stroke differ between patients with and patients without delirium.

METHODS

We included patients who participated in the Prospective Observational Polish Study on post-stroke delirium and underwent the Montreal Cognitive Assessment (MoCA) at day 1, day 8 and 3 months after stroke. Delirium was diagnosed using DSM-5 criteria. We used mixed linear regression models to characterize changes in mean adjusted MoCA scores over time.

RESULTS

We included 402 patients (mean age: 68.9 ± 13.3 years; mean NIHSS on admission: 6.2 ± 5.5; 48.8 % female). Delirium occurred in 18.9 % of them. Mean adjusted MoCA scores increased from day 1 to day 8 (20.48 vs 23.34, P < 0.001) and then declined from day 8 to month 3 (23.34 vs 22.21, P < 0.001). The rate of change in total MoCA scores from day 1 to day 8 (net effect: 0.65, 95 %CI: -1.19; 2.49, P = 0.489) and from day 8 to month 3 (net effect: -2.43, 95 %CI: -4.84; -0.02, P = 0.147) did not differ between patients with and patients without delirium. Compared with patients without delirium, those with delirium showed a greater improvement in naming, orientation and attention, accompanied by a worsening in memory from day 1 to day 8. They also experienced a greater decline in attention and orientation, along with a greater improvement in memory from day 8 to 3 months.

CONCLUSIONS

Post-stroke delirium is associated with short-term trajectories of specific cognitive domains, but not with changes in global cognition.

Days Not at Home: Association of Vulnerability with Healthcare Utilization After Hospitalization for Heart Failure

BACKGROUND

Heart failure (HF) hospitalizations are characterized by vulnerability in functioning and frequent post-discharge healthcare utilization in both acute and post-acute settings.

OBJECTIVE

To determine, in patients hospitalized for decompensated HF, the association of vulnerability with (1) detailed forms of post-discharge healthcare utilization, and (2) days spent away from home after initial hospital discharge.

DESIGN

Secondary analysis of a prospective longitudinal cohort study from a single-center academic institution in the USA.

PARTICIPANTS

Adults admitted with acute decompensated HF who were discharged alive.

MAIN MEASURES

The Vulnerable Elders Survey 13 (VES-13) measured functional vulnerability at baseline. The primary outcome was the Highest Healthcare Utilization (HHU) 90 days post-discharge, from the following ordered categories: at home, emergency room visit, skilled nursing facility stay, hospital readmission, or death. The secondary outcome was the proportion of days not at home (DNAH) within the first 90 days. Analyses were performed using a partial proportional odds model with adjustment for demographics and health characteristics.

KEY RESULTS

A total of 806 patients were included with median age 65, interquartile range [IQR] 55-73 years. Fewer than half (N = 345 [43%]) of patients remained alive and at home during 90-day follow-up. There were 286 [35%] hospital readmissions and 70 [8.7%] participants died. The median DNAH was 3 [IQR 0-16]. Increased vulnerability was associated with (1) HHU, (2) higher odds of utilizing healthcare or dying versus being at home alive 90 days post-discharge (OR 1.81 [95% CI, 1.35, 2.42]), and (3) higher odds of DNAH in the first 90 days (OR 1.55 [95% CI, 1.27, 1.89]).

CONCLUSIONS

In this cohort of patients hospitalized for decompensated HF, vulnerability predicted higher levels of healthcare utilization, as well as total days not at home in the 90 days following hospitalization. Vulnerability may have clinical applications to identify patients at greatest need for comprehensive, patient-centered discharge planning.

Characteristics, Complications, and Outcomes of Critical Illness in Patients with Parkinson Disease

BACKGROUND

Adults with Parkinson disease (PD) are hospitalized at higher rates than age-matched controls, and these hospitalizations are associated with significant morbidity. However, little is known about the consequences of critical illness requiring intensive care unit (ICU)-level care in patients with PD. The aim of this study was to define the characteristics and outcomes of adults with PD admitted to the ICU.

METHODS

We performed a retrospective nested case-control study using the Medical Information Mart for Intensive Care IV data set. Adults with PD were identified, and the index ICU admission for these subjects was matched 1:4 with index ICU admissions without a PD diagnosis based on age, sex, comorbidities, illness severity, ICU type, and need for mechanical ventilation. Primary outcomes were in-hospital mortality and discharge location. Secondary outcomes were length of stay and prespecified complications.

RESULTS

A total of 630 adults with PD were identified. Patients with PD were older and were more likely to be male, have more comorbidities, and have higher illness severity at presentation. A matched analysis revealed adults with PD did not have a significant difference in in-hospital mortality but were more likely to be discharged to a higher level of care. Adults with PD had longer hospital lengths of stay and increased odds of delirium, pressure ulcers, and ileus.

CONCLUSIONS

During critical illness, patients with PD are at increased risk for longer hospital lengths of stay and complications and require a higher level of care at discharge than matched controls. These findings reveal targets for interventions to improve outcomes for patients with PD and may inform discussions about goals of care in this population.

Rationale and Design for the BLOCK-SAH Study (Pterygopalatine Fossa Block as an Opioid-Sparing Treatment for Acute Headache in Aneurysmal Subarachnoid Hemorrhage): A Phase II, Multicenter, Randomized, Double-Blinded, Placebo-Controlled Clinical Trial with a Sequential Parallel Comparison Design

BACKGROUND

Acute post-subarachnoid hemorrhage (SAH) headaches are common and severe. Management strategies for post-SAH headaches are limited, with heavy reliance on opioids, and pain control is overall poor. Pterygopalatine fossa (PPF) nerve blocks have shown promising results in treatment of acute headache, including our preliminary and published experience with PPF-blocks for refractory post-SAH headache during hospitalization. The BLOCK-SAH trial was designed to assess the efficacy and safety of bilateral PPF-blocks in awake patients with severe headaches from aneurysmal SAH who require opioids for pain control and are able to verbalize pain scores.

METHODS

BLOCK-SAH is a phase II, multicenter, randomized, double-blinded, placebo-controlled clinical trial using the sequential parallel comparison design (SPCD), followed by an open-label phase.

RESULTS

Across 12 sites in the United States, 195 eligible study participants will be randomized into three groups to receive bilateral active or placebo PPF-injections for 2 consecutive days with periprocedural monitoring of intracranial arterial mean flow velocities with transcranial Doppler, according to SPCD (group 1: active block followed by placebo; group 2: placebo followed by active block; group 3: placebo followed by placebo). PPF-injections will be delivered under ultrasound guidance and will comprise 5-mL injectates of 20 mg of ropivacaine plus 4 mg of dexamethasone (active PPF-block) or saline solution (placebo PPF-injection).

CONCLUSIONS

The trial has a primary efficacy end point (oral morphine equivalent/day use within 24 h after each PPF-injection), a primary safety end point (incidence of radiographic vasospasm at 48 h from first PPF-injection), and a primary tolerability end point (rate of acceptance of second PPF-injection following the first PPF-injection). BLOCK-SAH will inform the design of a phase III trial to establish the efficacy of PPF-block, accounting for different headache phenotypes.

Perioperative Near Infrared Spectroscopy Measurements of Cerebral Regional Oxygen Desaturations Are Not Associated With Delirium After Cardiac Surgery

OBJECTIVE

Postoperative delirium remains a common complication after cardiac surgery in high-risk patients and has been associated with prolonged intensive care unit length of stay, overall morbidity, and mortality. It has been proposed that cerebral hypoperfusion is an important etiological component. In the present study, we retrospectively queried intraoperative near-infrared spectroscopy measurements of regional cerebral oxygen saturations (rSO2) during adult cardiac surgical procedures to examine the association between rSO2 desaturations and postoperative delirium.

DESIGN

Retrospective observational cross-sectional study.

SETTING

Single tertiary care institution.

PARTICIPANTS

Patients aged 18 and older undergoing cardiac or open ascending thoracic aortic surgery from January 2016 through April 2023 were eligible; 3,696 patients were included in the analysis.

MEASUREMENTS AND MAIN RESULTS

As per departmental protocol, bilateral rSO2 probes were applied to the patients' forehead before induction of anesthesia. The first 5 minutes of rSO2 measurements were averaged and used as their baseline measurements. The total intraoperative duration of rSO2 measurements that were either 20% below baseline or below an absolute value of 50% and the total time in either category were determined. Postoperative delirium was assessed using the Confusion Assessment Method for Intensive Care Unit during the postoperative period. Age, cerebral vascular disease, preoperative cognitive impairment, dexmedetomidine use, and durations of cardiopulmonary bypass and bispectral index values less than 40 were associated with delirium. Neither baseline rSO2 nor any of the perioperative rSO2 desaturation incidences or durations were associated with postoperative delirium.

CONCLUSIONS

Neither baseline nor intraoperative near-infrared spectroscopy-measured cerebral rSO2 parameters were associated with postoperative delirium. Additional future studies are necessary to further define the value of perioperative cerebral rSO2 monitoring for the prevention of delirium after cardiac surgery.

Assessment of Geriatric Problems and Risk Factors for Delirium in Surgical Medicine: Protocol for Multidisciplinary Prospective Clinical Study

BACKGROUND

An aging population in combination with more gentle and less stressful surgical procedures leads to an increased number of operations on older patients. This collectively raises novel challenges due to higher age heavily impacting treatment. A major problem, emerging in up to 50% of cases, is perioperative delirium. It is thus vital to understand whether and which existing geriatric assessments are capable of reliably identifying risk factors, how high the incidence of delirium is, and whether the resulting management of these risk factors might lead to a reduced incidence of delirium.

OBJECTIVE

This study aimed to determine the frequency and severity of geriatric medical problems in elective patients of the Clinics of Oral and Maxillofacial Surgery, Vascular Surgery, and Orthopedics, General Surgery, and Trauma Surgery, revealing associations with the incidence of perioperative delirium regarding potential risk factors, and recording the long-term effects of geriatric problems and any perioperative delirium that might have developed later the patient's life.

METHODS

We performed both pre- and postoperative assessments in patients of 4 different surgical departments who are older than 70 years. Patient-validated screening instruments will be used to identify risk factors. A geriatric assessment with the content of basal and instrumental activities of daily living (basal activities of daily living [Katz index], instrumental activities of daily living [Lawton and Brody score], cognition [6-item screener and clock drawing test], mobility [de Morton Mobility Index and Sit-to-Stand test], sleep [Pittsburgh Sleep Quality Index and Insomnia Severity Index/STOP-BANG], drug therapy [polypharmacy and quality of medication, Fit For The Aged classification, and anticholinergic burden score], and pain assessment and delirium risk (Delirium Risk Assessment Tool) will be performed. Any medical problems detected will be treated according to current standards, and no intervention is planned as part of the study. In addition, a telephone follow-up will be performed 3, 6, and 12 months after discharge.

RESULTS

Recruitment started in August 2022, with 421 patients already recruited at the time of submission. Initial analyses of the data are to be published at the end of 2024 or the beginning of 2025.

CONCLUSIONS

In the current study, we investigate whether the risk factors addressed in the assessment are associated with an increase in the delirium rate. The aim is then to reduce this comprehensive assessment to the central aspects to be able to conduct targeted and efficient risk screening.

TRIAL REGISTRATION

German Clinical Trials Registry DRKS00028614; https://www.drks.de/search/de/trial/DRKS00028614.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/59203.

Association of distorted memories, psychiatric symptoms, and quality of life in postoperative ICU patients after 12 months: A cross-sectional study

Intensive care unit patients often experience memory disturbances, including missing or delusional memories. These memory distortions can contribute to the development of psychiatric disorders, such as anxiety and depression. In addition, distorted memories may adversely affect long-term quality of life. However, the association between distorted memories, psychiatric symptoms, and quality of life remains to be fully elucidated in intensive care unit patients. Accordingly, this study explored the relationship between memory distortion, psychiatric symptoms, and long-term quality of life in intensive care unit patients following scheduled surgery. Among 24 patients, 13 experienced memory distortions 12 months post-intensive care unit discharge. These patients exhibited significantly higher anxiety and depression symptoms 1 month after discharge. In addition, over 25% of patients reported low mental quality of life, and over 50% had low physical quality of life 1 year later. These findings suggest that memory distortions can negatively impact both mental and physical recovery, underscoring the need for interventions to preserve factual memory and enhance patient autonomy post-intensive care unit.

Critical care nurses' prioritisation of patient care, including delirium prevention and management strategies: A mixed-method study

BACKGROUND

Delirium is a common issue in critical care, yet its prevention and management strategies are often inconsistent. Understanding the factors that lead to the omission or delay in delirium-related care by critical care nurses is essential for enhancing patient outcomes.

OBJECTIVES

This study aimed to identify the specific delirium-related prevention and management strategies that are frequently missed or delayed by critical care nurses. It also explored factors influencing nurses' prioritisation of care, including delirium-related strategies.

METHODS

A mixed-method approach was utilised, combining quantitative data from online surveys and qualitative insights from interviews with critical care nurses in a Canadian health authority. The Missed Nursing Care Survey identified instances of missed or delayed care, while interviews provided deeper insights into care prioritisation decisions.

RESULTS

Quantitative findings indicated frequent delays in patient mobilisation and physical care that were attributed to staffing shortages, high patient volume, and increased admissions and discharges. Qualitative findings revealed that factors such as patient acuity, structured routines, knowledge gaps, limited support, unit culture, and resource inadequacies influenced the prioritisation of delirium-related care, often leading to its inadvertent deprioritisation.

CONCLUSION

This study underscores the need to integrate delirium care into patient acuity assessments and establish sustainable education programs to enhance the recognition and prioritisation of delirium by critical care nurses. Addressing these factors is critical for improving patient outcomes in critical care settings.

IMPLICATIONS FOR CLINICAL PRACTICE

Strengthening critical care nurses' capacity to consistently recognise and prioritise delirium-related care through targeted education and system-level support could potentially contribute to better patient outcomes.

Association between delirium severity and prognosis following Transcatheter aortic valve implantation

BACKGROUND

Delirium is associated with patient prognosis after transcatheter aortic valve implantation (TAVI). However, the prognostic impact of subsyndromal delirium, described as an intermediate stage between delirium and normal cognition, is uncertain. The present study aimed to investigate the prognostic impact of delirium severity in patients undergoing TAVI.

METHODS AND RESULTS

We prospectively assessed the delirium status of 1617 consecutive patients who underwent TAVI at Kokura Memorial Hospital using the Intensive Care Delirium Screening Checklist (ICDSC). The patients were divided into the following three groups: no-delirium [ICDSC score 0, n = 1035 (64.0 %)], subsyndromal delirium [ICDSC 1-3, n = 348 (21.5 %)], and delirium [ICDSC 4-8, n = 234 (14.5 %)] groups. A worse delirium status was associated with older age, higher degree of frailty, and higher prevalence of comorbidities, including atrial fibrillation, dementia, and peripheral arterial disease. At 2 years post-procedure with a clinical follow-up rate of 92.6 %, the cumulative all-cause mortality rate was significantly higher in the subsyndromal delirium (21.8 %) (p < 0.001) and delirium (29.1 %) (p < 0.001) groups than in the no-delirium group (11.9 %). After adjusting for pre- and post-procedural confounders, subsyndromal delirium and delirium were associated with an increased mortality risk [adjusted hazard ratio (HR) for subsyndromal delirium, 1.38; 95 % CI, 1.00-1.90; p = 0.049; adjusted HR for delirium, 1.61; 95 % CI, 1.15-2.17; p = 0.006].

CONCLUSIONS

Delirium conditions, including delirium and subsyndromal delirium, occurred in more than one-third of patients who had undergone TAVI and were associated with increased mortality.

A Critical Reappraisal of Haloperidol for Delirium Management in the Intensive Care Unit: Perspective from Psychiatry

Delirium is a complex neuropsychiatric syndrome with multifactorial pathophysiology, encompassing a wide range of neuropsychiatric symptoms, and its management remains a significant challenge in critical care. Although often managed with antipsychotics, like haloperidol, current research has predominantly focused on dopamine dysregulation as the primary driver of delirium, overlooking its broader neuroanatomical and neurochemical underpinnings. This has led to a majority of research focusing on haloperidol as a treatment for intensive care unit (ICU) delirium. Our review critically evaluates the role of haloperidol in ICU delirium management, particularly in light of recent large-scale randomized controlled trials (RCTs) that have primarily focused on delirium-free days and mortality as the primary endpoints. These studies highlight an limited understanding of the true nature of delirium treatment, which requires a broader, neuropsychiatric approach. We argue that future research should shift focus to neuropsychiatric symptoms such as agitation and psychosis and explore the clinical and functional benefits of reducing these distressing symptoms. Additionally, the stratification of delirium by subtypes and etiology, the enhancement of detection tools, and the adoption of multi-intervention and multi-disciplinary care approaches should be prioritized. Despite the methodological flaws in these studies, the findings support the safety of haloperidol in the ICU setting, with minimal risk of adverse events, particularly cardiac and neuropsychiatric. Moving forward, delirium research must integrate modern neuroscientific understanding and adopt more multi-disciplinary input and nuanced, patient-centered approaches to truly advance clinical care and outcomes.

Predilection for Perplexion: Preoperative microstructural damage is linked to postoperative delirium

Postoperative delirium is the most common postsurgical complication in older adults and is associated with an increased risk of long-term cognitive decline and Alzheimer's disease (AD) and related dementias (ADRD). However, the neurological basis of this increased risk-whether postoperative delirium unmasks latent preoperative pathology or leads to AD-relevant pathology after perioperative brain injury-remains unclear. Recent advancements in neuroimaging techniques now enable the detection of subtle brain features or damage that may underlie clinical symptoms. Among these, Neurite Orientation Dispersion and Density Imaging (NODDI) can help identify microstructural brain damage, even in the absence of visible macro-anatomical abnormalities. To investigate potential brain microstructural abnormalities associated with postoperative delirium and cognitive function, we analyzed pre- and post-operative diffusion MRI data from 111 patients aged ≥60 years who underwent non-cardiac/non-intracranial surgery. Specifically, we investigated preoperative variation in diffusion metrics within the posterior cingulate cortex (PCC), a region in which prior work has identified glucose metabolism alterations in the delirious brain, and a key region in the early accumulation of amyloid beta (Aβ) in preclinical AD. We also examined the relationship of preoperative PCC NODDI abnormalities with preoperative cognitive function. Compared to patients who did not develop postoperative delirium (n=99), we found increased free water (FISO) and neurite density index (NDI) and decreased orientation dispersion index (ODI) in the dorsal PCC before surgery among those who later developed postoperative delirium (n=12). These FISO differences before surgery remained present at six weeks postoperatively, while these NDI and ODI differences did not. Preoperative dorsal PCC NDI and ODI values were also positively associated with preoperative attention/concentration performance, independent of age, education level, and global brain atrophy. Yet, these diffusion metrics were not correlated with cerebrospinal fluid Aβ positivity or levels. These results suggest that preoperative latent brain abnormalities within the dorsal PCC may underlie susceptibility to postoperative delirium, independent of AD-related (i.e., Aβ) neuropathology. Furthermore, these preoperative microstructural differences in the dorsal PCC were linked to preoperative deficits in attention/concentration, a core feature of postoperative delirium. Our findings highlight microstructural vulnerability within the PCC, a key region of the default mode network, as a neuroanatomic locus that can help explain the link between preoperative attention/concentration deficits and increased postoperative delirium risk among vulnerable older surgical patients.

Cerebral Oximetry Index-Guided Blood Pressure Management During Cardiopulmonary Bypass Reduces Postoperative Delirium in Patients with Acute Type A Aortic Dissection

OBJECTIVE(S)

To investigate whether cerebral oximetry index (COx)-guided blood pressure management during cardiopulmonary bypass (CPB) could reduce postoperative delirium (POD) in patients undergoing acute type A aortic dissection (ATAAD) repair.

DESIGN

A prospective, randomized controlled trial.

SETTING

Patients undergoing ATAAD repair with CPB.

PARTICIPANTS

157 patients with ATAAD were randomly assigned to COx-guided management (n = 76) or conventional blood pressure management (n = 81) during CPB.

INTERVENTIONS

COx-guided blood pressure management (intervention group) versus conventional blood pressure management (control group) during CPB.

MEASUREMENTS AND MAIN RESULTS

The primary outcome was POD incidence within the first 7 postoperative days (significantly lower in the COx-guided group: 15% v 30%, p = 0.039). Secondary outcomes included lower delirium severity (Delirium Rating Scale-Revised-98 score: 5 v 10, p = 0.033), shorter POD duration (0 v 2 days, p = 0.045), reduced postoperative cerebral infarction (1.3% v 8.6%, p = 0.037), and reduced acute kidney injury (27.6% v 43.2%, p = 0.042) in the COx-guided group. Shorter time to extubation (16.9 v 18.4 hours, p = 0.027) and reduced intensive care unit stay (7.3 v 8.2 days, p = 0.042) were observed in the COx-guided group.

CONCLUSIONS

COx-guided blood pressure management during CPB was associated with reduced incidence and severity of POD following ATAAD surgery. This approach also showed potential benefits in reducing postoperative complications and improving early recovery outcomes. Further multicenter studies are needed to confirm these findings.

The feasibility of virtual reality therapy for upper extremity mobilization during and after intensive care unit admission

Introduction

Early mobilization reduces long-term muscle weakness after intensive care unit (ICU) admission, but barriers (e.g., anxiety, lack of motivation) may complicate patients' adherence to exercise. Virtual reality (VR) presents immersive stimuli, which may increase motivation and adherence. This study aimed to examine the feasibility of VR-therapy using a VR-headset during ICU- and subsequent general ward admission. Furthermore, physical parameters before and after training were explored.

Materials & Methods

Ten adult ICU-patients with a median age of 71 [63-79], 70% of male registered birth sex, mechanically ventilated for ≥48 h, and willing to participate, were included. VR-therapy was offered three times a week for 20 minutes in addition to standard care. To train upper extremity functionality, patients were instructed to complete puzzles with increasing level of difficulty. Feasibility was based on patient satisfaction, session efficiency, and adherence levels during the training. Fatigue was measured after each session using the Borg Rating of Perceived Exertion Scale. Patients' hand-grip strength and Morton Mobility Index (MMI) were evaluated at the start of VR-therapy and after four weeks of training or at hospital discharge.

Results

On average, patients followed three VR-therapy sessions of 20 min per week with 13 min of actual training time, over the course of 1 to 3 weeks depending on their length of stay. Session efficiency ranged from 25% to 93%. In total, patients adhered to 60% of the VR-therapy sessions. MMI scores increased significantly from the start (26 [24-44]) to the end of the VR-therapy training period (57 [41-85], p = 0.005), indicating improved balance and mobility.

Conclusion

VR-therapy for upper extremity rehabilitation in ICU-patients is feasible during stay in the ICU and general ward.

Evaluating the effectiveness of a clinical decision support system (AI-Antidelirium) to improve Nurses' adherence to delirium guidelines in the intensive care unit

OBJECTIVES

To evaluate the impact of Artificial Intelligence Assisted Prevention and Management for Delirium (AI-AntiDelirium) on improving adherence to delirium guidelines among nurses in the intensive care unit (ICU).

RESEARCH METHODOLOGY/DESIGN

Between November 2022 and June 2023, A cluster randomized controlled trial was undertaken.

SETTING

A total of 38 nurses were enrolled in the interventional arm, whereas 42 nurses were recruited for the control arm in six ICUs across two hospitals in Beijing, comparing nurses' adherence and cognitive load in units that use AI-AntiDelirium or the control group.

MAIN OUTCOME MEASURES

The AI-AntiDelirium tailored delirium preventive or treated interventions to address patients' specific risk factors. The adherence rate of delirium interventions was the primary endpoint. The other endpoints were adherence to risk factors assessment, ICU delirium assessment, and nurses' cognitive load. The repeated measures analysis of variance was utilized to explore the influence of time, group, and time × group interaction on the repeated measurement variable (e.g., adherence, cognitive load).

RESULTS

A cumulative total of 1040 nurse days were analyzed for this study. The adherence to delirium intervention of nurses in AI-AntiDelirium groups was higher than control units (75 % vs. 58 %, P < 0.01). When compared to control groups, AI-AntiDelirium was found to be significantly effective in both decreasing extraneous cognitive load (P < 0.01) and improving germane cognitive load (P < 0.01).

CONCLUSIONS

This study supports the effectiveness of AI-AntiDelirium in enhancing nurses' adherence to evidence-based, individualized delirium intervention and also reducing extraneous cognitive load.

IMPLICATIONS FOR CLINICAL PRACTICE

A nurse-led systemshould be applied by nursing administrators to improve compliance with nursing interventions among ICU nurses.

The association between the neutrophil-to-lymphocyte ratio, platelet-to-lymphocyte ratio, and lymphocyte-to-monocyte ratio and delirium in ischemic stroke patients

Background

Delirium is a severe neuropsychiatric symptom following acute ischemic stroke (IS) and is associated with poor outcomes. Systemic inflammation and immune dysregulation are believed to contribute to the pathophysiology of delirium. The neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and lymphocyte-to-monocyte ratio (LMR) are widely recognized as convenient and reliable biomarkers of systemic inflammation. However, their association with delirium after IS remains unclear.

Methods

In this study, we identified IS patients requiring ICU admission from the Medical Information Mart for Intensive Care (MIMIC)-IV database. We employed multivariable logistic regression and restricted cubic splines (RCS) to assess the association between the NLR, PLR, and LMR and delirium. Two-sample Mendelian randomization (MR) analysis was performed to further explore their causal relationship at the genetic level.

Results

A total of 1,436 patients with IS were included in this study, of whom 214 (14.9%) had delirium. In the multivariate logistic regression analysis, after adjustment for confounders, the patients in the highest quartile of the NLR (odds ratio [OR] 2.080, 95% confidence interval [CI], 1.282-3.375) and LMR (OR 0.503, 95% CI 0.317-0.798) and the patients in the second quartile of the PLR (OR 1.574, 95% CI 1.019-2.431) were significantly associated with delirium. The RCS function showed a progressive increase in the risk of delirium with higher NLR and PLR and lower LMR. In the MR analysis, only the PLR was negatively associated with the risk of delirium.

Conclusion

The observational studies found significant associations between the NLR, PLR, and LMR and delirium. However, the MR analysis only demonstrated a potential protective causal relationship between the PLR and delirium. Further prospective studies are needed to validate their association and to elucidate the underlying mechanisms.

Association between prophylactic intermittent non-invasive positive pressure ventilation and incidence of pneumonia in patients with cervical spinal cord injury: a retrospective single-center cohort study

Background

Patients with cervical spinal cord injuries (CSCIs) have a high incidence of respiratory complications. The effectiveness of non-invasive positive pressure ventilation (NPPV) in preventing respiratory complications such as pneumonia in acute CSCIs remains unclear. We evaluated whether intermittent NPPV (iNPPV) could prevent pneumonia in patients with acute CSCIs.

Methods

This single-center, retrospective study evaluated patients diagnosed with CSCIs with American Spinal Injury Association Impairment Scale scores of A-C between January 2012 and December 2022. Patients were categorized based on receipt of iNPPV into the iNPPV and usual care groups. Prophylactic iNPPV was defined as the initiation of iNPPV within 72 hours of admission. The primary outcome was the development of pneumonia. The secondary outcomes were other respiratory complications (tracheal intubation and tracheostomy) and adverse events (delirium and vomiting). The groups were compared with regard to outcomes after adjustment for patient backgrounds using inverse probability of treatment weighting (IPTW) with propensity scores.

Results

Of the 213 patients during the study period, 94 were included. Of these, 61 (64.9%) received prophylactic iNPPV. The incidence of pneumonia was 27.9% in the iNPPV group and 48.5% in the usual care group in the unadjusted cohort. In the propensity score analysis using IPTW, the iNPPV group showed a lower incidence of pneumonia than the usual care group (29.0% vs 56.5%, p<0.001). Tracheal intubation and tracheostomy were less common in the iNPPV group than those in the usual care group (10.6% vs 29%; p=0.001 and 10.6% vs 27.1%; p=0.003, respectively). The incidences of delirium and vomiting did not increase in the iNPPV group.

Conclusions

Prophylactic iNPPV was associated with a lower incidence of pneumonia in patients with acute CSCIs.

Level of evidence

Ⅳ.

IMPACT-ICU feasibility study: pragmatic mixed-methods randomised controlled trial of a follow-up care intervention for survivors of critical illness and caregivers

INTRODUCTION

Survivors of critical illness and their caregivers are at risk for long-term cognitive, physical and psychiatric impairments known as post-intensive care syndrome (PICS) and PICS-family, respectively. This study will assess the feasibility of a randomised controlled trial (RCT) evaluating an intensive care unit (ICU) follow-up care bundle versus standard-of-care for ICU patients and their caregivers.

METHODS AND ANALYSIS

This is a single-centre feasibility study. Survivors of critical illness will be eligible if: age ≥18 years, life expectancy ≥6 months and high risk for PICS. We define high risk as ICU stay ≥4 days or involving 1+ of mechanical ventilation, tracheostomy, delirium or lack of access to a primary care physician (PCP). 20 ICU survivor-primary caregiver dyads will be enrolled (n=10 dyads per group) and randomised 1:1 to the intervention versus control group. The intervention will be: (1) diaries to journal patient experiences, (2) information packages on expectations post-discharge and (3) specialised follow-up care at 1 and 3 months post-discharge. The control group will receive standard of care in the ICU and follow-up with their PCP. The primary outcome is feasibility, defined as: (1) consent rate >80%, (2) enrolment rate of 4 participants/month, (3) follow-up rate>70% and (4) data capture rate >80%. Our secondary objective is to explore the perspectives of survivors of critical illness and their families about the intervention and their participation in the study. Tertiary outcomes will be a battery of cognitive, physical functioning and psychiatric outcomes.

IMPLICATIONS

Survivorship from critical illness extends beyond surviving an ICU stay. This project will lay the foundation for performing a large, multicentre pragmatic RCT with survivors of critical illness and their caregivers, paving the way for improved long-term healthcare.

ETHICS AND DISSEMINATION

This study has received approval (6039808) from the Queen's University Health Sciences/Affiliated Teaching Hospitals Research Ethics Board. Results will be presented at critical care conferences. A lay summary co-designed with ICU survivor participants will be provided to patients.

TRIAL REGISTRATION NUMBER

NCT06681649.

Bibliometric Analysis of Neuroinflammation and Postoperative Cognitive Dysfunction

BACKGROUND

The occurrence and development of postoperative cognitive dysfunction (POCD) are closely linked to neuroinflammation. This bibliometric analysis aims to provide novel insights into the research trajectory, key research topics, and potential future development trends in the field of neuroinflammation-induced POCD.

METHODS

The Web of Science Core Collection (WoSCC) database was searched to identify publications from 2012 to 2023 on neuroinflammation-induced POCD. Bibliometric analysis, involving both statistical and visual analyses, was conducted using CiteSpace, VOSviewer, and the R software.

RESULTS

Research on neuroinflammation-induced POCD has exhibited an increasing trend over the past 12 years. China had the highest number of publications, Nanjing Medical University had the most collaboration with other institutions, Zhiyi Zuo was the most published author, and the Journal of Neuroinflammation served as the primary publication in the field of neuroinflammation-induced POCD. The most frequent keyword was POCD. Keyword clustering analysis indicated that the predominant cluster is dexmedetomidine. Burst detection revealed that postoperative delirium (POD), perioperative neurocognitive disorders (PND), apoptosis, and epigenetic modifications were the future research trends.

CONCLUSIONS

Our analysis identified the following key research areas associated with neuroinflammation-induced POCD: anesthesia, surgery, dexmedetomidine, NLRP3 inflammasome, and mechanism of neuroinflammation-induced POCD. The potential future research topics comprise POD, PND, apoptosis, and epigenetic modifications.

Nurses' perceptions of patient pain, delirium, and sedation assessments in the intensive care unit: A qualitative study

BACKGROUND

Pain, delirium, and sedation should be assessed routinely using validated assessment scales. Inappropriately managed pain, delirium, and sedation in critically ill patients can have serious consequences regarding mortality, morbidity, and increased healthcare costs. Despite the benefits of a bundled approach to pain, delirium, and sedation assessments, few studies have explored nurses' perceptions of using validated scales for such assessments. Furthermore, no studies have examined nurses' perceptions of undertaking these assessments as a bundled approach.

OBJECTIVES

The objective of this study was to explore nurses' knowledge, perceptions, attitudes, and experiences regarding the use of validated pain, delirium, and sedation assessment tools as a bundled approach in the intensive care unit (ICU).

METHODS

A qualitative exploratory descriptive design was adopted. We conducted four focus groups and 10 individual interviews with 23 nurses from a 26-bed adult ICU at an Australian metropolitan tertiary teaching hospital. Data were analysed using thematic analysis techniques.

FINDINGS

Four themes were identified: (i) factors impacting nurses' ability to undertake pain, delirium, and sedation assessments in the ICU; (ii) use, misuse, and nonuse of tools and use of alternative strategies to assess pain, delirium, and sedation; (iii) implementing assessment tools; and (iv) consequences of suboptimal pain, delirium, and sedation assessments. A gap was found in nurses' use of validated scales to assess pain, delirium, and sedation as a bundled approach, and they were not familiar with using a bundled approach to assessment.

CONCLUSION

The practice gap could be addressed using a carefully planned implementation strategy. Strategies could include a policy and protocol for assessing pain, delirium, and sedation in the ICU, engagement of change champions to facilitate uptake of the strategy, reminder and feedback systems, further in-service education, and ongoing workplace training for nurses.

Reperfusion therapy and risk of post-stroke delirium

OBJECTIVES

Delirium is a common and serious post-stroke complication. Early reperfusion by ameliorating brain damage could potentially prevent delirium after ischemic stroke, but the impact of this therapy on delirium remains unclear. We aimed to explore the association between reperfusion therapy (RT) and post-stroke delirium.

METHODS

We retrospectively analyzed data from the PRospective Observational POLIsh Study on post-stroke delirium. Symptoms of delirium were examined during the first 7 days after admission and a diagnosis of delirium was made using Diagnostic and Statistical Manual of Mental Disorders (DSM-5) criteria. We used logistic regression to examine the association between RT and delirium.

RESULTS

We included 301 acute stroke patients (median age: 77; median NIHSS: 14; 55.1% female). In the whole group of patients, RT was associated with a lower odds of delirium (34.2% vs 44.8%; adjusted OR: 0.56, 95% CI: 0.32-0.96, p = 0.035). There was a significant interaction between RT and pre-stroke cognitive status. As a result, RT was associated with a lower odds of delirium in patients without premorbid cognitive decline (28.8% vs 48.2%; adjusted OR: 0.34, 95% CI: 0.17-0.66, p = 0.002) and a higher odds of delirium in patients with pre-stroke cognitive decline (72.7% vs 41.0%; adjusted OR: 3.55, 95% CI: 1.03-12.20, p = 0.040).

DISCUSSION

The association between RT and delirium is modified by pre-stroke cognitive status. In patients without cognitive decline, RT is associated with a lower likelihood of delirium. Delirium should be considered as a relevant outcome in future controlled trials.

Prevention of Delirium in the Intensive Care Unit through Nonpharmacological Interventions: An Umbrella Review

Introduction

Delirium is a syndrome commonly seen in intensive care unit (ICU) patients. It is characterized by acute changes in mental status, inattention, disorganized thinking, and altered level of consciousness. Due to its higher prevalence in mechanically ventilated ICU patients, it is crucial to recognize it early and implement standardized evidence-based protocols for preventing it in regular practice.

Objectives

To identify the benefits and effectiveness of nonpharmacological interventions for preventing delirium among critically ill patients admitted to the ICU.

Methods

The preferred reporting items for systematic reviews and meta-analyses statement guidelines were followed. Two independent authors searched electronic and grey literature for systematic review and meta-analysis in the following databases: PubMed, Scopus, Web of Science, Cochrane Database of Systematic Reviews, and Google Scholar.

Results

This umbrella review included 12 studies on delirium prevention interventions, excluding reviews, abstracts, case studies, and pharmacological interventions. Our finding shows that multicomponent strategies are the most promising intervention for preventing delirium. Inclusion of family participation is the most vital part, with flexible visitation to be included in delirium care protocols. Multidisciplinary approaches raise workloads among healthcare professionals through increased coordination, assessments, and documentation.

Conclusions

Multicomponent interventions are regarded as the most effective among all nonpharmacological interventions for reducing and preventing delirium.

Highlights

Delirium syndrome is preventable among mechanically ventilated patients. The study aims to identify the benefits and effectiveness of nonpharmacological interventions for preventing delirium among critically ill patients admitted to the ICU.

How to cite this article

Sonia M, Kaur S, Kothari N. Prevention of Delirium in the Intensive Care Unit through Nonpharmacological Interventions: An Umbrella Review. Indian J Crit Care Med 2025;29(1):75-83.

Rocking Motion Therapy for Delirious Patients in the ICU: A Multicenter Randomized Clinical Trial

OBJECTIVES

Rocking motion therapy has been shown to calm people with dementia but has never been investigated in delirious patients in the ICU. The aim of this clinical trial was to investigate the efficacy and safety of a rocking motion vs. nonrocking motion chair on the duration of delirium and intensity of agitation in ICU patients with delirium. We hypothesized that rocking motion therapy would increase the number of days alive without coma or delirium at 2 weeks of follow-up.

DESIGN

This was a multicenter, investigator initiated, parallel-group randomized controlled trial.

SETTING/PATIENTS

ICU patients 18 years or older with a positive delirium assessment.

INTERVENTIONS

Participants were assigned to either a minimum of 20 minutes rocking motion therapy or a minimum of 20 minutes in the same chair without rocking motion therapy turned on daily.

MEASUREMENTS AND MAIN RESULTS

The primary outcome was days alive without coma or delirium 2 weeks after randomization. We enrolled 149 patients; 73 were randomly assigned to rocking motion therapy and 76 to nonrocking motion therapy. Primary outcome data were available in 141 patients.

CONCLUSIONS

Among patients with delirium in the ICU, the use of rocking motion therapy did not lead to a statistically significantly greater number of days alive without coma or delirium at the 2 weeks of follow-up than nonrocking motion therapy.

Circulating Chemokines and Short- and Long-Term Outcomes After Ischemic Stroke

Chemokines are vital in post-cerebral ischemia inflammatory reactions. We investigate the possible relationship between plasma chemokines and short-term and long-term outcomes after stroke. This study included 235 patients (median age, 72 years; 49.8% female) suffering from ischemic stroke, or transient ischemic attack admitted to the hospital within 24 h of onset. We evaluated chemokines CCL2, CCL5, CXCL8, CXCL9, and CXCL10 in plasma samples collected upon admission. Further, we assessed functional outcomes at 3- and 12-months, all-cause fatality over 5 years, and episodes of delirium within the first 7 days of admission. Multivariate analysis revealed an association between higher CXCL10 levels and an increased risk of poor functional outcomes at 3 months (OR: 3.02, 95%CI: 1.22-7.46, p = 0.016) and 12 months (OR: 2.32, 95%CI: 1.03-5.26, p = 0.043), as well as an increased death risk (HR: 1.79, 95%CI: 1.04-3.07, p = 0.036). High CXCL8 levels independently predicted poor functional outcomes at 12 months (OR: 2.69, 95%CI: 1.39-6.31, p = 0.005) and a higher 5-year case fatality rate (HR: 1.90, 95%CI: 1.23-2.93, p = 0.004). Elevated CXCL9 levels also predicted unfavourable functional outcomes at 12 months (OR: 2.45, 95%CI: 1.07-5.61, p = 0.034). In univariate analysis, increased levels of CXCL8, CXCL9, and CXCL10 showed an association with delirium, although this link was not evident in the multivariate analysis. Plasma CXCL8 and CXCL10 show potential as prognostic biomarkers for stroke outcomes and as therapeutic targets suitable for reverse translation.

Delirium Management Quality Improvement Project to Improve Awareness and Screening in a Medical ICU

Background/Objectives: Although delirium is common during critical illness, standard-of-care detection and prevention practices in real-world intensive care unit (ICU) settings remain inconsistent, often due to a lack of provider education. Despite availability for over 20 years of validated delirium screening tools such as the Confusion Assessment Method in the ICU (CAM-ICU), feasible and rigorous educational efforts continue to be needed to address persistent delirium standard-of-care practice gaps. Methods: Spanning an 8-month quality improvement project period, our single-ICU interdisciplinary effort involved delivery of CAM-ICU pocket cards to bedside nurses, and lectures by experienced champions that included a live delirium detection demonstration using the CAM-ICU, and a comprehensive discussion of evidence-based delirium prevention strategies (e.g., benzodiazepine avoidance). Subsequent engagement by health system leadership motivated the development of an electronic health record dataset to evaluate unit-level outcomes, including CAM-ICU documentation and benzodiazepine administration. Results: Using a dataset that spanned 9 pre- and 37 post-project months and included 3612 patients, 4470 admissions, and 33,913 patient days, we observed that delirium education was followed by a dramatic rise in CAM-ICU documentation, from <1% for daytime and nighttime shifts to peaks of 73% and 71%, respectively (p < 0.0001 for trend), and a fall in the proportion of mechanically ventilated patients ever receiving benzodiazepine infusions (69% to 41%; p < 0.0001). Conclusions: An interdisciplinary delirium project comprising rigorous lectures on standard-of-care practices can yield significant improvements in documentation and sedative administration. This approach can help ICUs jumpstart efforts to build awareness and address longstanding gaps in standard-of-care delirium practices.

Overtime work of anesthesiologists is associated with increased delirium in older patients admitted to intensive care unit after noncardiac surgery: a secondary analysis

BACKGROUND

Overtime work is common in anesthesiologists due to shortage of manpower. Herein, we analyzed if overtime work of anesthesiologists was associated with delirium development in older patients after surgery.

METHODS

This was a secondary analysis of the database from a randomized trial. Seven hundred older patients (aged ≥ 65 years) who were admitted to the intensive care unit (ICU) after elective noncardiac surgery were enrolled in the underlying trial. Anesthesiologists who worked continuously for more than 8 h by the end of the surgery were marked as "work overtime". Delirium was assessed with the Confusion Assessment Method for the ICU twice daily during the first 7 postoperative days. The association between overtime work of anesthesiologists and development of postoperative delirium was analyzed with multivariable logistic regression models.

RESULTS

All 700 patients (mean age 74.3 years, 39.6% female) were included in this analysis. Anesthesiologists of 281 patients (40.1%) were marked as "work overtime" at the end of surgery. When compared with patients whose anesthesiologists didn't work overtime, patients whose anesthesiologist worked overtime had a higher incidence of delirium within 7 days (20.3% [57/281] vs. 12.9% [54/419], P = 0.009). After correction for confounding factors, both overtime work (OR 1.87, 95% CI 1.19-2.94, P = 0.007) and prolonged continuous working hours of anesthesiologists (OR 1.08, 95% CI 1.01-1.15, P = 0.020) were associated with an increased risk of postoperative delirium.

CONCLUSIONS

Overtime work of anesthesiologists was associated with an increased risk of delirium development in older patients admitted to ICU after major noncardiac surgery.

TRIAL REGISTRATION

The underlying trial was registered with Chinese Clinical Trial Registry ( https://www.chictr.org.cn/showproj.html?proj=8734 ; ChiCTR-TRC-10000802; March 18, 2010).

Sex specific differences in short-term mortality after ICU-delirium

INTRODUCTION

Delirium is a frequent complication in critically ill patients and is associated with adverse outcomes such as long-term cognitive impairment and increased mortality. It is unknown whether there are sex-related differences in intensive care unit (ICU) delirium and associated outcomes. We aimed to assess sex-specific differences in short-term mortality following ICU-delirium.

METHODS

We conducted a retrospective cohort study using the Medical Information Mart for Intensive Care-IV (MIMIC-IV) database. Adult ICU patients who were diagnosed with delirium using the Confusion Assessment Method for the ICU (CAM-ICU) were included. The primary outcome was 30-day mortality following delirium onset. To control for baseline differences in demographics, illness severity, and comorbidities, we applied 1:1 propensity score matching. Cox proportional hazards regression models were used to evaluate the association between sex and mortality.

RESULTS

A total of 8950 ICU patients with delirium were analyzed, of whom 42.6% were women. In univariable analysis, women had higher crude mortality (26.0% vs. 23.4%; HR 1.16, 95% CI 1.071-1.267, p < 0.001). After propensity score matching, the cohort included 3811 women and 3811 men. In adjusted analysis, risk for thirty-day mortality remained higher in women (HR 1.16, 95% CI 1.064-1.273, p < 0.001).

CONCLUSION

Our study suggests that women with ICU-delirium have a significantly higher risk of short-term mortality than men. Acknowledging the limitations inherent to observational studies with potential for residual confounding, further research is needed to understand the biological and clinical factors driving this disparity and to inform sex-specific interventions for ICU-delirium.

Sex-Specific Validity of the PRE-DELIRIC Model and the E-PRE-DELIRIC Model for Predicting Delirium in Patients After Cardiac Surgery

BACKGROUND

Several risk prediction models are used in intensive care units (ICUs) to detect delirium risk.

OBJECTIVE

The aim of this study was to compare the sex-specific validity of the Prediction of Delirium in ICU patients (PRE-DELIRIC) and Early Prediction of Delirium in ICU patients (E-PRE-DELIRIC) models for predicting delirium in ICU patients after cardiac surgery.

METHODS

Retrospective data from electronic medical records of ICU patients who underwent cardiac surgery between January 2019 and December 2022 were examined. Both models were evaluated using sensitivity, specificity, and positive and negative predictive values based on the highest Youden index for female and male patients. Receiver operating characteristic curve analysis was performed.

RESULTS

Delirium incidence was 30.7% and 27.5% in female and male patients, respectively. In the PRE-DELIRIC model, the highest Youden index scores for female and male patients were 67.00 and 57.54, respectively, with sensitivities and specificities of 61% and 88%, and 72% and 79%, respectively. In the E-PRE-DELIRIC model, the highest scores for female and male patients were 14.25 and 14.05, with sensitivities and specificities of 78% and 50%, and 70% and 53%, respectively. The area under the curve of the PRE-DELIRIC model for female and male patients was 0.77 and 0.78, respectively, and that of the E-PRE-DELIRIC model was 0.67 and 0.63, respectively.

CONCLUSIONS

The PRE-DELIRIC model showed higher specificity and was more reliable for male patients, whereas the E-PRE-DELIRIC model demonstrated better sensitivity for female patients due to its inclusion of more female-sensitive factors. A combined approach is recommended for improved reliability and validity in delirium risk assessment in clinical settings.

Evaluation of Delirium Risk Factors in Intensive Care Patients

Objective

The negative effects of delirium in intensive care unit (ICU) patients necessitate the identification and management of risk factors. This study aimed to determine the incidence of delirium and its associated modifiable and non-modifiable factors in the ICU setting to provide valuable insights for better patient care and outcomes.

Methods

Patients admitted to the ICU underwent delirium screening twice daily. Comprehensive records of modifiable and non-modifiable risk factors were maintained throughout the ICU stay.

Results

The incidence of delirium was 32.5%. Age [odds ratio (OR) 1.04, confidence interval (CI) 1.02-1.06, P < 0.001)]. Illiteracy (OR 4, CI 1.19-13.35, P=0.02), hearing impairment (OR 3.37, CI 1.71-7.01, P=0.001), visual impairment (OR 3.90, CI 2.13-7.15, P < 0.001), hypertension (OR 2.56, CI 1.42-4.62, P=0.002), Sequential Organ Failure Assessment score (OR 1.21, CI 1.08-1.36, P=0.001), Acute Physiology and Chronic Health Evaluation II score (OR 1.20, CI 1.12-1.28, P < 0.001), presence of a nasogastric catheter/drain (OR 2.15, CI 1.18-3. 90, P=0.01), tracheal aspiration (OR 3.63, CI 1.91-6.90, P < 0.001), enteral nutrition (OR 2.54, CI 1.12-5.76, P=0.02), constipation (OR 1.65, Cl 1.11-2.45, P=0.02), oliguria (OR 1.56, Cl 1.06-2.28, P=0.02), midazolam infusion (OR 3. 4, Cl 1.16-10.05, P=0.02), propofol infusion (OR 2.91 Cl 1.03-8.19, P=0.04), albumin use (OR 2.39, Cl 1.11-5.14 P=0.02) and steroid use (OR 2.17, Cl 1.06-4.40, P=0.03) were found to be independent risk factors for delirium.

Conclusion

This study highlights several risk factors contributing to delirium, such as age, sensory impairment, educational level, procedural interventions, and medications. Oral nutrition and mobilization are effective strategies for reducing delirium incidence in the ICU.

Disorientation as a delirium feature in non-intubated patients: development and evaluation of diagnostic accuracy of the 'Confusion Assessment Method for Intermediate Care Unit' (CAM-IMC) - a prospective cohort study

BACKGROUND

Disorientation is an early indicator of developing postoperative delirium (POD), which is associated with increased mortality and cognitive decline. The well-established "Confusion-Assessment-Method-for-Intensive-Care-Unit" (CAM-ICU) for diagnosing POD in intubated patients cannot make use of the feature 'disorientation', as this requires verbal communication. Other tools such as the 4AT test for disorientation but are not established in ICU settings. We therefore combined test-variables of the CAM-ICU (level of consciousness, fluctuating mental status and inattention) with verbal testing for disorientation to develop and enhance diagnostic accuracy of the "Confusion Assessment Method for Intermediate Care Unit" (CAM-IMC). In the present study we describe the development and the evaluation of the diagnostic accuracy of the CAM-IMC.

METHODS

We conducted a prospective cohort-study to develop and evaluate the diagnostic accuracy of the CAM-IMC and disorientation for diagnosing POD in non-intubated patients undergoing elective cardiac surgery. All patients were eligible during data collection period. Exclusion criteria were preexisting brain-organic disease, age < 50 years, preoperative intubation, and insufficient language skills. Patients were assessed for POD using the CAM-IMC as the index-test by two independent examiners over three postoperative days. Reference-testing was conducted by experienced reference-raters. The primary outcome was the diagnostic test-performance.

RESULTS

Among 178 eligible patients, 624 paired observations were completed with 155 patients. Of these, 9% experienced POD. Sensitivity and specificity were 0.96 (CI-95%: 0.87-1.00) and 0.94 (CI-95%: 0.92-0.96), respectively. Area-Under-the-Receiver-Operating-Characteristic-Curve (AUROC; equivalent to c-statistic) for CAM-IMC with a cut-off at three points was 0.95 (CI-95%: 0.93-0.98). The interrater reliability was 0.80 (CI-95%: 0.69-0.91).

CONCLUSION

The CAM-IMC demonstrates excellent test performance for diagnosing POD in non-intubated patients by combining features of the CAM-ICU with 'disorientation'. Given an aging community with an increasing delirium risk, the CAM-IMC provides a highly structured assessment tool for POD. It enables early and accurate detection of delirium, which is critical for timely intervention and improved patient outcomes. The CAM-IMC appears to be a useful tool to be implemented in units for not-intubated patients and seems to be the perfect match where the CAM-ICU is already in use for monitoring POD.

TRIAL REGISTRATION

DRKS00026980 (German registry of clinical studies).