Gray matter atrophy and white matter lesions burden in delayed cognitive decline following carbon monoxide poisoning.

Gray matter (GM) atrophy and white matter (WM) lesions may contribute to cognitive decline in patients with delayed neurological sequelae (DNS) after carbon monoxide (CO) poisoning. However, there is currently a lack of evidence supporting this relationship. This study aimed to investigate the volume of GM, cortical thickness, and burden of WM lesions in 33 DNS patients with dementia, 24 DNS patients with mild cognitive impairment, and 51 healthy controls. Various methods, including voxel-based, deformation-based, surface-based, and atlas-based analyses, were used to examine GM structures. Furthermore, we explored the connection between GM volume changes, WM lesions burden, and cognitive decline. Compared to the healthy controls, both patient groups exhibited widespread GM atrophy in the cerebral cortices (for volume and cortical thickness), subcortical nuclei (for volume), and cerebellum (for volume) (p < .05 corrected for false discovery rate [FDR]). The total volume of GM atrophy in 31 subregions, which included the default mode network (DMN), visual network (VN), and cerebellar network (CN) (p < .05, FDR-corrected), independently contributed to the severity of cognitive impairment (p < .05). Additionally, WM lesions impacted cognitive decline through both direct and indirect effects, with the latter mediated by volume reduction in 16 subregions of cognitive networks (p < .05). These preliminary findings suggested that both GM atrophy and WM lesions were involved in cognitive decline in DNS patients following CO poisoning. Moreover, the reduction in the volume of DMN, VN, and posterior CN nodes mediated the WM lesions-induced cognitive decline.

Hyperbaric oxygen should be used for carbon monoxide poisoning.

This short review addresses the mechanisms of injury mediated by carbon monoxide (CO) and current information on efficacy of hyperbaric oxygen therapy (HBOT). Recent clinical series involving large, country-wide databases and prospective randomized trials are summarized. We conclude that there is an abundance of basic science and preclinical and clinical research supporting the use of HBOT for acute CO poisoning. With appropriate consideration for pathology and therapeutic mechanisms, HBOT at a dose of 2.5-3.0 atm absolute is a necessary treatment for this toxidrome.

Two similar carbon monoxide poisoning cases with different outcomes: evidence from longitudinal fMRI.

Prognosis after carbon monoxide (CO) poisoning is difficult to assess using structural images. Functional connectivity provided by functional magnetic resonance imaging (fMRI) may explain the mechanism of differential prognosis. We report here two cases of carbon monoxide poisoning with simultaneous coma. They were nearly normal on days 7-8, but diagnosed with delayed neurological sequelae (DNS) with cognitive and motor impairments on days 22-29. Similar Methylprednisolone pulse therapy and hyperbaric oxygen therapy were given to them. The movement disorder of case 1 improved slightly during the recovery stage, while the movement disorder of case 2 worsened significantly. In case 1, the function of supplementary motor area decreased first and then increased, and the function of pallidum increased first and then decreased. Case 2 showed a reduction in the supplementary motor area and small changes in the pallidum after DNS, but both were reduced during recovery stage. The cognitive ability of case 1 remained poor, while that of case 2 improved during the recovery stage. FMRI showed damage to the right and bilateral hippocampus in case 1 and partial damage to the left hippocampus in case 2. Taken together, fMRI can be a useful method to study functional connectivity abnormalities corresponding to different prognoses.

Early gray matter atrophy and neurological deficits in patients with carbon monoxide poisoning.

PURPOSE: To investigate early neurological deficits-related change patterns in gray matter (GM) volume in patients with carbon monoxide poisoning (COP) and GM volume differences between patients with and without delayed neurological sequelae (DNS) and those with and without T2 hyperintense lesions after COP. METHODS: Forty-one COP patients (24 patients with DNS) and 36 sex- and age-matched healthy controls (HC) were enrolled in this study. The neurological assessments were administered within 24 h after MRI scans. Voxel-based morphometry analysis was used to detect regional GM volume change. RESULTS: The COP group had statistically significant GM atrophy in the bilateral prefrontal and temporal lobes, anterior cingulate (ACC), thalamus, posterior cerebellum, and right hippocampus compared to the HC group. Atrophy in the left medial orbital superior frontal gyrus (SFG), bilateral ACC, and bilateral thalamus were related to lower Mini-Mental State Examination (MMSE) scores and higher Unified Parkinson's Disease Rating Scale subsection III and neuro-psychiatric inventory scores. Atrophy in the hippocampus and posterior cerebellum were also related to decrease MMSE scores. The DNS subgroup had greater GM atrophy in the limbic system than the non-DNS subgroup. Compared to the subgroup without T2 hyperintense lesions, greater GM atrophy in the limbic system, motor and visual cortex, and default network was observed in the subgroup with T2 hyperintense lesions. CONCLUSION: GM atrophy in the medial orbital SFG, ACC, thalamus, hippocampus, and posterior cerebellum is associated with early neurological deficits in patients with COP. Greater atrophy occurred in patients with DNS and those with T2 hyperintense lesions.

Glasgow Coma Scale on admission as predictor of neurological sequelae at discharge and acute respiratory failure in patients with heatstroke.

BACKGROUND: Transient neuronal dysfunction may occur in most brain regions with heatstroke (HS). This study aimed to explore the prognostic significance of initial Glasgow Coma Scale (GCS) scores in HS. METHODS: Retrospective data regarding HS were obtained from six hospitals. The primary outcome was neurological sequelae at discharge. Secondary outcomes included acute respiratory failure (ARF) and intensive care unit (ICU) admission. Logistic regression models and random forest imputation were used to assess the independent association between GCS score and outcomes. Interaction and stratified analyses of body temperature (BT) at 0.5 hours were also conducted. Receiver operating characteristic curves and decision curve analysis were used to estimate prognostic values. RESULTS: Of 206 patients, 44 (21.36%) had neurological sequelae at discharge. The mean ± standard deviation initial GCS score was 8.17 ± 4.05. After adjustment for confounders, GCS, as a continuous variable, was significantly related to neurological sequelae at discharge [odds ratio (OR): 0.65; 95% confidence interval (CI): 0.50-0.85; P = 0.002], ARF (OR: 0.76; 95% CI: 0.66-0.87; P = 0.001), and ICU admission (OR: 0.68; 95% CI: 0.53-0.87; P = 0.003). These relationships were consistent in the random forest imputation cohort. The OR between GCS and neurological sequelae at discharge was much lower (P = 0.048) in participants with BT at 0.5 hours ≤39°C than in those with BT at 0.5 hours >39°C. The GCS and National Early Warning Score (NEWS) had similar prognostic ability for all outcomes, whereas the net benefits were greater with the GCS compared with the NEWS. CONCLUSIONS: Initial GCS score was an independent prognostic factor for neurological sequelae at discharge in HS. Rapid cooling played a positive role in this relationship. Key messages What is already known on this topic Brain damage caused by heatstroke (HS) can be transient or result in irreversible injury. Early recognition of those at risk of death or developing neurological complications is very important for improving the outcomes of HS. What this study adds Initial Glasgow Coma Scale (GCS) score was an independent prognostic factor for neurological sequelae at discharge, acute respiratory failure, and intensive care unit (ICU) admission in HS. Rapid cooling played a positive role in this relationship. How this study might affect research, practice, or policy The GCS upon emergency department admission can be a useful predictor of prognosis in patients with HS.

Social and health determinants related to adverse short-term outcomes after a first-ever stroke in adults younger than 65 years.

BACKGROUND: Stroke-related mortality and disability-adjusted life years in adults younger than 65 have increased over the last decade. However, geographical differences in distributing these outcomes could reflect dissimilarity in determinants. Therefore, this cross-sectional study of secondary data from Chilean hospitals aims to analyze the association of sociodemographic and clinical factors with in-hospital case-fatality risk or acquired neurologic deficits (adverse outcomes) in inpatients aged 18 to 64 who experienced their first-ever stroke. METHODOLOGY: Adjusted multivariable logistic regression models and interaction analysis using multiple imputation for missing data (4.99%) for 1,043 hospital discharge records from the UC-CHRISTUS Health Network International Refined Diagnosis Related Groups (IR-DRG) system database (2010-2021) were conducted. RESULTS: Mean age: 51.47 years (SD, 10.79); female: 39.60%. Stroke types: subarachnoid hemorrhage (SAH): 5.66%, intracerebral hemorrhage (ICH): 11.98%, and ischemic: 82.45%. Adverse outcomes: 25.22% (neurological deficit: 23.59%; in-hospital case-fatality risk: 1.63%). After adjusting for confounders, adverse outcomes were associated with stroke type (patients with ICH and ischemic stroke had higher odds than those with SAH), sociodemographic characteristics (age ≥ 40 years, residence in an area of the capital city other than the center-east, and coverage by public health insurance), and discharge diagnoses (obesity, coronary artery and chronic kidney diseases, and mood and anxiety disorders). For hypertension, women had higher odds of adverse outcomes. CONCLUSIONS: In this predominantly Hispanic sample, modifiable social and health determinants are related to adverse short-term outcomes after a first-ever stroke. Longitudinal studies are needed to investigate the causal role of these factors.

Speech therapy and hyperbaric oxygen for aphasia after carbon monoxide intoxication.

Acute carbon monoxide (CO) intoxication may result in delayed neurological sequelae, which can include amnesia, ataxia, aphasia, emotional lability, disorientation, dysphagia, and other manifestations. A 27-year-old man reported symptoms of aphasia with agraphia and alexia in a review after CO intoxication. The patient received outpatient speech therapy, as well as repeated sessions of hyperbaric oxygen for 15 days, interspersing speech therapy with hyperbaric oxygen therapy for two months. After this period of combined treatment the aphasic symptomatology remitted, and oral and written language was normal. The complete disappearance of aphasia with agraphia and alexia confirms the efficacy of the combined intervention. More data from large clinical studies are needed to assess the outcomes of hyperbaric oxygen treatment in patients with delayed neurological sequelae after CO intoxication, but this case suggests it may be a good therapeutic option in combination with specific speech therapy.

Quantitative assessment of viral load in the blood and urine of patients with congenital cytomegalovirus infection using droplet digital PCR.

Congenital cytomegalovirus infection (cCMV) is a common cause of congenital infections, leading to neurodevelopmental sequelae. Real-time quantitative polymerase chain reaction (qPCR) has been widely used for the diagnosis and assessment of cCMV; however, the correlation between CMV DNA load and the severity of cCMV symptoms has been inconclusive. Droplet digital PCR (ddPCR) offers an improvement over the current qPCR methods through the absolute quantification of viral loads. We compared ddPCR and qPCR results for the quantification of CMV DNA in blood and urine specimens from 39 neonates with cCMV (21 symptomatic and 18 asymptomatic). There was no significant difference in blood CMV DNA loads measured by ddPCR and qPCR, with or without any clinical findings. However, developmental delays at 36 months were significantly more frequently observed in patients with high CMV DNA loads (≥2950 copies/ml), as measured by ddPCR at diagnosis, than in those with lower CMV DNA loads. The association of urine CMV DNA load with symptoms and developmental delay was not observed. CMV DNA loads in the blood might be used as a predictor of developmental outcomes in cCMV patients, and absolute quantitation of viral loads by ddPCR assay could contribute to the standardization of CMV load measurement.

Delayed presentation to hospital care is associated with sequelae but not mortality in children with cerebral malaria in Malawi.

BACKGROUND: Cerebral malaria is still a major cause of death in children in sub-Saharan Africa. Among survivors, debilitating neurological sequelae can leave children with permanent cognitive impairments and societal stigma, resulting in taxing repercussions for their families. This study investigated the effect of delay in presentation to medical care on outcome in children with cerebral malaria in Malawi. METHODS: This retrospective study included participants enrolled in a longstanding study of cerebral malaria between 2001 and 2021 and considered coma duration prior to arrival at hospital (with or without anti-malarial treatment), HIV status, blood lactate levels at admission and age as factors that could affect clinical outcome. Outcomes were categorized as full recovery, sequelae at the time of discharge, or death. A multinomial regression was fit and run controlling for coma duration, HIV status, lactate levels and age, to determine the association between each explanatory variable and outcome. RESULTS: A total of 1663 children with cerebral malaria, aged 6 months to 14 years were included. Longer coma duration (in hours) was associated with greater odds of developing sequelae (OR = 1.023, 95% CI 1.007-1.039, p = 0.006) but not death (OR = 1.00, 95% CI 0.986-1.015, p = 0.961). Younger age (in months) was also correlated with higher rates of sequelae, (OR = 0.990, 95% CI 0.983-0.997, p = 0.004) but not with increased mortality (OR = 0.998, 95% CI 0.993-1.003, p = 0.335). Blood lactate levels on admission were correlated with mortality (OR = 1.125, 95% CI 1.090-1.161, p < 0.001) but not associated with increased rates of sequelae (OR = 1.016, 95% CI 0.973-1.060, p = 0.475). Positive HIV status and treatment with an anti-malarial (artemisinin or non-artemisinin-based) prior to arrival at the hospital were not significantly associated with either adverse outcome. CONCLUSIONS: In Malawian children with cerebral malaria, higher rates of sequelae were significantly associated with extended coma duration prior to admission and younger age. Mortality rates were correlated with increased lactate levels on admission. The differential effects of variables on clinical outcomes suggest that there may be different pathogenic pathways leading to sequelae and death. Actions taken by parents and health care professionals are critical in defining when patients arrive at hospital and determining their ultimate outcome.

Neurological sequelae in acute carbon monoxide poisoning: A prospective observational study with MRI data.

OBJECTIVES: Acute carbon monoxide (CO) poisoning survivors may experience persistent neurological sequelae (PNS) and delayed neurological sequelae (DNS). This study evaluated the clinical features, laboratory results, acute brain lesions (ABLs) on diffusion-weighted imaging (DWI) at presentation, and long-term outcomes and explored differences between patients with PNS and DNS. METHODS: The study included 443 patients who had experienced CO poisoning, underwent DWI and completed 1-year follow-ups. The demographics, comorbidities, symptomatology, laboratory results, ABLs on DWI at presentation, and long-term outcomes were compared between patients with PNS and those with DNS. RESULTS: The 42 (9.5%) and 96 (21.7%) patients with PNS and DNS, respectively, showed no significant differences in demographics, duration of CO exposure, initial conscious level, symptomatology, and laboratory results. ABLs on DWI were observed in 33 patients (33/42) with PNS and 62 patients (62/96) with DNS. The most common region of ABLs was the globus pallidus (60.6% and 56.6% in PNS and DNS, respectively). The proportion of ABLs present and lesion distribution did not differ significantly between the two groups. At 1 year, a significantly higher proportion of patients in the PNS group showed a good outcome (defined as modified Rankin Scale [mRS] scores of 0-2, 81%) compared with the DNS group (81% vs. 56.3%, p = .047). CONCLUSION: Demographics, clinical features, laboratory results, and acute brain lesions on MRI at presentation did not differ between the PNS and DNS groups. However, the long-term outcome of PNS was better than that of DNS.

Predicting scale of delayed neuropsychiatric sequelae in patients with acute carbon monoxide poisoning: A retrospective study.

OBJECTIVE: To establish and validate a predictive formula for calculating the possibility of developing delayed neurological sequelae (DNS) after acute carbon monoxide (CO) poisoning to facilitate better decision-making about treatment strategies. METHODS: This study retrospectively enrolled 605 consecutive patients who had been newly diagnosed with CO poisoning from the Central Hospital of Enshi Prefecture between January 1, 2015 and December 31, 2020. The cohort was randomly divided into two subgroups: the development cohort (n = 104) and validation cohort (n = 44). Univariate analysis and backward elimination of multivariate logistic regression were used to identify predictive factors, and a predictive formula was established. The performance was assessed using the area under the curve (AUC), the mean AUC of five-fold cross-validation, and calibration plots. RESULTS: The formula included four commonly available predictors: initial GCS score, duration of exposure, CK, and abnormal findings on MRI. We next created a formula to calculate the risk score for developing DNS: Risk score = -4.54 + 3.35 * (Abnormal findings on MRI = yes) - 0.51 * (Initial GCS score) + 0.65 * (Duration of exposure) + 0.01 * (CK). Then, the probability of developing DNS could be calculated: Probability of DNS = 1/(1 + e Risk score). The model revealed good discrimination with AUC, and mean AUC of fivefold cross-validation in two cohort, and the calibration plots showed good calibration. CONCLUSIONS: This study established a prediction predictive formula for predicting developing of DNS, which could facilitate better decision-making about treatment strategies.

Charcoal burning is associated with a higher risk of delayed neurological sequelae after domestic carbon monoxide poisoning in South China: A retrospective cohort study.

BACKGROUNDS: Delayed neurological sequelae (DNS) are a severe complication of carbon monoxide poisoning (COP) and high predisposing rates of disability and mortality, yet the relationship between exposure factors and DNS remains unknown. The aim was to investigate the association between domestic sources of COP and DNS. METHODS: Patients diagnosed with COP between December 2016 and November 2021 were included and divided into two groups according to their sources of poisoning and the endpoint outcome was analyzed by logistic regression before and after propensity score matching (PSM). RESULTS: Overall, medical data from 314 patients were analyzed. In multivariate logistic regression, advanced age (adjusted odds ratio (AOR): 1.028, 95% CI: 1.008-1.049, P = 0.007), longer duration of exposure to the first treatment of hyperbaric oxygen (HBO) (AOR: 1.081, 95% CI: 1.036-1.127, P = 0.001), and intoxication by charcoal burning (AOR: 3.24, 95% CI: 1.208-8.69, P = 0.019) were associated with a higher risk of developing DNS. After 1:1 PSM, the outcomes also revealed that charcoal burning intoxication (odds ratio (OR): 8.396, 95% CI: 3.342-21.095, P<0.001) was associated with greater odds of DNS. CONCLUSIONS: This study indicates that domestic COP caused by charcoal burning is more likely to trigger DNS than gas-emitting heaters.

Diagnosis, treatment and prognosis of otomastoiditis induced by Fusobacterium necrophorum: A retrospective multicentre cohort study.

OBJECTIVES: Otomastoiditis caused by the anaerobic Fusobacterium necrophorum (F. necrophorum) often induces severe complications, such as meningitis and sinus thrombosis. Early diagnosis is difficult, partly because little is known about specific early signs. Comprehensive research about clinically chosen antimicrobial therapy has not been done yet and prognostic information about otomastoiditis caused by F. necrophorum is scarce. More knowledge about this subject is required. METHODS: In this retrospective cohort study, we included all cases of otomastoiditis caused by F. necrophorum treated in two university medical centres in the Netherlands during the past 10 years. Data was gathered from patient records and analysed using independent sample T-tests and Chi2-tests. RESULTS: This study reveals that otomastoiditis caused by F. necrophorum potentially induces neurological sequelae. Thereby, 80% of all included patients (n = 16) needed readmission within six months due to recurrence or complications of otomastoiditis caused by F. necrophorum. Mean (range) of age, CRP and temperature were 4.5 years (0.9-29.3), 243 mg/L (113-423) and 40 °C (37-41). All patients were hospitalized and treated with antibiotics, mostly metronidazole (n = 13/16) and a ß -lactam (n = 15/16). Additional treatment contained low molecular weight heparin (83%, n = 10/12), dexamethasone (78%, n = 7/9) and/or surgery (80%, n = 12/16, whereof 9/12 mastoidectomy). CONCLUSIONS: Patients and/or their parents need to be informed about this potential unfortunate prognosis when otomastoiditis caused by F. necrophorum is diagnosed. To improve early diagnosis, otomastoiditis caused by F. necrophorum should be suspected and therefore immediately cultured when a) young children present with otomastoiditis, with b) high CRP values, and/or c) vomiting and decreased consciousness.

Objective predictors of delayed neurological sequelae in patients with altered mental status after carbon monoxide poisoning.

BACKGROUND AND PURPOSE: Following carbon monoxide (CO) poisoning, altered mental status is an important predictor of poor neurological prognosis, including delayed neurological sequelae (DNS). However, it is difficult to interview CO-poisoned patients accurately about exposure intervals and loss of consciousness (LOC). Thus, we investigated whether DNS can be predicted using objective factors such as laboratory results and brain imaging in patients suffering CO poisoning with altered mental status. METHODS: This was a prospective observational study involving all CO-poisoned patients who visited the university hospital emergency department (ED) in Bucheon, South Korea, between January 2019 and April 2020. All were registered in the CO registry. We excluded patients who were under 18 years of age, had no change in mental status, were lost to follow-up, had neurological deficits persisting at discharge from the ED, and/or were transferred from another hospital 24 hours after exposure. RESULTS: A total of 21 (25.3%) of 82 patients had DNS with a median onset of 21 (12 to 30) days. Creatinine kinase (CK) (odds ratio 1.0002, 95% confidence interval 2.734-105.231) and brain imaging (odds ratio 3.206, 95% confidence interval 1.008-10.199) were independent prognostic factors of DNS. CONCLUSION: A high level of serum CK and abnormal brain-imaging results were significant predictors of the occurrence of DNS in CO-poisoned patients with altered mental status. Critically, these are objective rather than subjective factors such as CO exposure interval.

The Neurological Predictor Scale Predicts Adaptive Functioning via Executive Dysfunction in Young Adult Survivors of Childhood Brain Tumor.

OBJECTIVES: Survivors of childhood brain tumors experience neurological sequelae that disrupt everyday adaptive functioning (AF) skills. The Neurological Predictor Scale (NPS), a cumulative measure of tumor treatments and sequelae, predicts cognitive outcomes, but findings on its relation to informant-reported executive dysfunction (ED) and AF are mixed. Given known effects of frontal-subcortical system disruptions on AF, this study assessed the NPS' relationship with AF as mediated by frontal systems dysfunction, measured by the Frontal Systems Behavior Scale (FrSBe). METHODS: 75 participants (Mage = 23.5, SDage = 4.5) were young adult survivors of childhood brain tumors at least 5 years past diagnosis. FrSBe and Scales of Independent Behavior-Revised (SIB-R), a measure of AF, were administered to informants. Parallel multiple mediator models included Apathy and ED as mediators, and age at diagnosis and time between diagnosis and assessment as covariates. RESULTS: More complex treatment and sequelae were correlated with poorer functioning. Mediation models were significant for all subscales: Motor Skills (MS), p = .0001; Social Communication (SC), p = .002; Personal Living (PL), p = .004; Community Living (CL), p = .007. The indirect effect of ED on SC and CL was significant; the indirect effect of Apathy was not significant for any subscales. CONCLUSIONS: More complex tumor treatment and sequelae were associated with poorer long-term AF via increased ED. Cognitive rehabilitation programs may focus on the role of executive function and initiation that contribute to AF, particularly SC and CL skills, to help survivors achieve comparable levels of independence in everyday function as their peers.

Impact of breast milk-acquired cytomegalovirus infection in premature infants: Pathogenesis, prevention, and clinical consequences?

Maternal-fetal transmission of cytomegalovirus (CMV) represents the most common infectious cause of long-term neurodevelopmental disability in children. Congenital CMV (cCMV) infection is associated with microcephaly, seizure disorders, cognitive disability, developmental delay, and sensorineural hearing loss (SNHL). Of these disabilities, SNHL is the most common, affecting approximately 10% of infants with cCMV. Although the sequelae of cCMV are well recognized, it is much less clear what long-term morbidities may occur in neonates that acquire post-natal CMV infection. Post-natal CMV (pCMV) infection is most commonly transmitted by breast-feeding, and in full-term infants is of little consequence. However, in preterm, very-low birthweight (VLBW) infants (<1500 g), pCMV can result in a severe sepsis-like syndrome, with wide-ranging end-organ disease manifestations. Although such short-term complications are well recognized among clinicians caring for premature infants, the long-term risks with respect to adverse neurodevelopmental outcomes remain controversial. In this review, we provide an overview of the clinical manifestations of breast milk-acquired pCMV infection. In particular, we summarize studies that have examined-sometimes with conflicting conclusions-the risks of long-term adverse neurodevelopmental outcome in VLBW infants that acquire pCMV from breast milk. We highlight proposed preventive strategies and antiviral interventions, and offer recommendations for high-priority areas for future basic science and clinical research.

The predictive value of neutrophil-lymphocyte ratio at presentation for delayed neurological sequelae in carbon monoxide poisoning.

OBJECTIVE: To explore the predictive value of neutrophil-lymphocyte ratio (NLR) at presentation for delayed neurological sequelae (DNS) in carbon monoxide (CO) poisoning. METHODS: This single-center retrospective observational study included a total of 253 consecutive patients who visited the emergency department (ED) due to acute CO intoxication between 7 October 2015 and 31 December 2019. The included patients had a history of coma and their blood routine was measured within one hour of ED admission. They were divided into two groups according to the presence of DNS, including those who developed DNS (DNS group) and those who did not (non-DNS group). RESULTS: A total of 171 patients were included in this research, and 49 (28.7%) developed DNS. The median NLR at ED admission was obviously higher in the DNS group (10.60 [9.69-15.34]) than in the non-DNS group (7.53 [5.86-8.56]) (p < 0.001). Multivariate analysis indicated that a high NLR (adjusted odds ratio (AOR): 1.78, 95% confidence interval (CI): 1.46-2.18) and the occurrence of acute brain lesions (AOR: 7.50, 95%CI: 2.86-19.68) on diffusion-weighted imaging were independent predictors of DNS. The NLR was more than 8.97. The prediction of occurrence of DNS had a sensitivity of 93.88% and a specificity of 84.43%. Kappa value was 0.713. The predicted results showed good authenticity and consistency. CONCLUSION: The level of NLR at presentation had good predictive value for the development of DNS, showing the superior value for clinical application.

Clinical predictors of delayed neurological sequelae in charcoal-burning carbon monoxide poisoning.

BACKGROUND: The main objective of the treatment of acute carbon monoxide (CO) poisoning is to prevent delayed neurological sequelae (DNS). However, today there is still no objective screening tool to identify patients at high risk of developing DNS. The aim of this study was to identify clinical factors that could predict DNS after acute charcoal-burning CO poisoning. METHODS: This prospective observational study was conducted from September 1, 2019 to August 31, 2020 in a single academic medical center. Patients older than 18 years of age suffering from charcoal-burning CO poisoning were included in the study. After acute recovery, patients were followed up for six weeks to investigate for DNS development. The clinical predictors of DNS were determined using a multivariate logistic regression model. RESULTS: Of the 217 patients-113 males (52.1%), median age 37.0 (27.5-51.5) years-included, 49 (22.6%) developed DNS. The multivariate logistic regression analysis revealed the independent predictors of DNS as a lower initial Glasgow Coma Scale (GCS) score (adjusted odds ratio (AOR): 0.73, 95% confidence interval (CI): 0.62-0.87), a longer duration of CO exposure (AOR: 2.18, 95% CI: 1.65-2.88), and the presence of acute brain lesions with high signal intensity on diffusion-weighted imaging (AOR: 5.22, 95% CI: 1.50-18.08). The created multivariate regression model predicted DNS development with high accuracy (area under the curve: 0.93, 95% CI: 0.89-0.97). CONCLUSION: A low initial GCS score, longer exposure to CO and abnormal findings on diffusion-weighted magnetic resonance imaging can assist in the early identification of patients at high risk of DNS development.

Multicenter retrospective analysis of the risk factors for delayed neurological sequelae after acute carbon monoxide poisoning.

OBJECTIVE: Delayed neurological sequelae (DNS) is a devastating consequence following acute carbon monoxide (CO) poisoning. This study aims at exploring the independent predictors of DNS in patients with CO exposure. METHODS: Data of patients with diagnosis of CO poisoning was retrospectively collected and reviewed in 5 regional medical facilities. Patients were classified into the DNS group and non-DNS group according to clinical findings during a follow-up period of 6 months. Demographic characteristics, co-morbidities, clinical manifestations, and treatment strategies were compared to identify possible correlative factors. Multivariate analysis was performed to determine the independent predictors of DNS. RESULTS: We screened 1129 patients and enrolled 326 cases (158 males, average age 44.56 ± 16.08 years) in the analysis. Thirty-seven (11.35%) developed DNS at a median interval of 33 days. Uni-variable analysis identified older age, higher body mass index, hypertension, loss of consciousness, longer CO exposure, lower Glasgow Coma Scale (GCS) on-site/at emergency room, and elevation of lactate as relevant factors for DNS; while multivariable logistic regression revealed that older age (OR = 1.11; p < 0.001), longer duration of CO exposure (OR = 1.54; p = 0.023), GCS on-site (OR = 2.06; p < 0.001), and GCS at emergency room (OR = 1.33; p = 0.048) were independent predictors for DNS. CONCLUSIONS: Our multicenter study demonstrated older age, longer duration of CO exposure, and GCS score were independent predictors of DNS in COP patients. GCS scored on-site might be a more sensitive and specific parameter compared with GCS evaluated at the emergency room. Further prospective studies in a larger patient cohort are warranted to draw a comprehensive conclusion.

Neurological and neurourological complications of electrical injuries.

Electrical injury can affect any system and organ. Central nervous system (CNS) complications are especially well recognised, causing an increased risk of morbidity, while peripheral nervous system (PNS) complications, neurourological and cognitive and psychological abnormalities are less predictable after electrical injuries. PubMed was searched for English language clinical observational, retrospective, review and case studies published in the last 30 years using the key words: electrical injury, electrocution, complications, sequelae, neurological, cognitive, psychological, urological, neuropsychological, neurourological, neurogenic, and bladder. In this review, the broad spectrum of neurological, cognitive, psychological and neurourological consequences of electrical trauma are discussed, and clinical features characteristic of an underlying neurological, psychological or neurourological disorder are identified. The latest information about the most recently discovered forms of nervous system disorders secondary to electrical trauma, such as the presentation of neurological sequelae years after electrocution, in other words long-term sequelae, are presented. Unexpected central nervous system or muscular complications such as hydrocephalus, brain venous thrombosis, and amyotrophic lateral sclerosis are described. Common and uncommon neuropsychological syndromes after electrical trauma are defined. Neurourological sequelae secondary to spinal cord or brain trauma or as independent consequences of electrical shock are also highlighted.