Modified Fisher Scale Research Articles

Abstract TMP11: Predictors Of Timely Treatment Of Aneurysmal Subarachnoid Hemorrhage - The Reddish Study

Background: Receiving early treatment for aneurysmal subarachnoid hemorrhage (aSAH) is associated with better outcomes for the patient. However, delays in treatment of aSAH are common but the causes are not well understood. We explored predictors of early treatment within 12.5 hours or 24 hours after aSAH. Methods: Consecutive cases of confirmed first-ever aSAH were identified from two Australian tertiary referral centers between 2010 and 2016. We used medical and ambulance records to extract details of participants, including time from onset to definitive treatment of either endovascular coiling or neurosurgical clipping, demographics, severity of aSAH (modified Fisher grade; World Federation of Neurosurgeons Scale [WFNS]), risk factors, pre-hospital care, and presenting symptoms. Factors associated with treatment to secure the aneurysm within 12.5 hours or 24 hours on univariable logistic regression were entered into a multivariable model to identify factors independently associated with (odds ratio [OR], 95% CI) earlier treatment. Results: Among 482 patients (mean [SD] age 54.1 [14.5]; 69.9% female) with aSAH, median (IQR) time to treatment was 19.4 (10.6, 31.0) hours, 30% were treated <12.5h and 62% were treated <24h from onset. In multivariable analyses (see figure), arriving by ambulance, urgent triage category (1-2) and severe aSAH (modified Fisher Scale 3-4) predicted treatment <12.5h and <24h. Less severe aSAH (WFNS score 1-3) and arriving overnight (11pm to 7am) were associated with treatment <24h. In contrast, people with no risk factors for aSAH (smoking, hypertension or alcohol use), presenting with a stiff neck or interfacility transfer more often had treatment ≥12.5h. Conclusions: A substantial proportion of people after aSAH were not treated within timeframes associated with better outcomes. Recognition of the urgency and severity aSAH cases were associated with more timely treatment of aSAH.

Abstract TP113: Association Of External Ventricular Drain Duration And Outcomes In Aneurysmal Subarachnoid Hemorrhage

Introduction: Hydrocephalus is a common complication following aneurysmal subarachnoid hemorrhage (aSAH) and is usually treated with external ventricular drain (EVD). However, there is no consensus on EVD weaning process and duration of cerebrospinal fluid (CSF) drainage. We aimed to determine association of EVD duration and outcomes. Methods: We performed a retrospective cohort study of consecutive patients with aSAH who were admitted to an academic referral center between 2016 and 2021. Binary logistic regression was used to test the association of EVD duration (continuous variable) and outcomes including functional outcome defined as modified Rankin scale of 4-6 at 3 months after discharge and requirement for ventriculoperitoneal shunt (VPS) placement. Multiple linear regression analysis was used to test the association of EVD duration and hospital length of stay (both continuous variables) Results: Of 316 patients with aSAH, 253 patients received external ventricular drain (EVD) on admission for symptomatic hydrocephalus and we included survivors (n=204) in final analysis. (mean age 57.9 years (SD 13.8), 62% female, 71% white). VPS was placed in 15% (30/204) prior to hospital discharge. Duration of EVD was longer in patients with worse functional outcome (median 18 days [IQR 13.5-23] vs 12 days [IQR 8-19); p=0.006). EVD wean was interrupted in 39% of survivors (80/204) due to persistent hydrocephalus (61%) and asymptomatic vasospasm (19%) based on transcranial Doppler criteria. Longer EVD duration was associated with higher VPS requirement (odds ratio 1.17 per day, 95% CI 1.09-1.26; p<0.001) after adjustment for age, aneurysm related factors, Hunt and Hess grades, modified Fisher scales and delayed cerebral ischemia. EVD related complications such as infections (2%) and tract hemorrhage (9%) were non-significantly higher in patients with longer EVD duration. (p=0.070) Longer EVD duration was associated with longer hospital length of stay (0.88 more days, 95% CI 0.73-1.04; p<0.001) independent of aSAH complications. Conclusions: Longer EVD duration can be associated with worse outcomes and higher need for VPS placement and longer hospital length of stay. Further studies are needed to justify early VPS placement in selected patients.

Abstract WP139: Association Of Antiplatelet Use And Outcomes In Aneurysmal Subarachnoid Hemorrhage

Introduction: Antiplatelet agents are commonly used after endovascular repair of ruptured aneurysms in patients with subarachnoid hemorrhage (SAH). Recent evidence suggests post-treatment antiplatelets may reduce risk of delayed cerebral ischemia (DCI) and worse outcome. We sought to determine potential risks and benefits of antiplatelets in our patients’ population Methods: This is a retrospective cohort study of consecutive patients with aneurysmal SAH who were admitted to an academic referral center from 2016 to 2021. We used multivariable logistic regression analysis, propensity score matching and multiple linear regression to test the association of antiplatelets use and functional outcome (modified Rankin Scale at 3 months), DCI, any intracranial hemorrhagic complications including EVD tract hemorrhage and ICU length of stay (continuous variable). Results: Of the confirmed aneurysmal SAH patients (n=315), mean age was 57 years (SD 13.6) and majority of patients were female (62%) and white (70%). Thirty-nine percent of patients received antiplatelets (26% single agent; 13% dual agents) with no differences in demographics. Of the patients in the cohort, 85% received endovascular treatments (including 59% coil, 12% pipeline and stent assisted coil, 14 other endovascular treatments) and 15% underwent surgical clipping. Antiplatelets were used more in aneurysms originating from posterior circulation compared to anterior circulation (54% vs 35%, p=0.012). There was no difference in functional outcome (modified Rankin Scale at 3 months), DCI, or any intracranial hemorrhagic complications including EVD tract hemorrhage. ICU length of stay was longer in patients who received antiplatelets (3.32 additional days, 95% CI 0.4-6.3; p=0.02) and this association was independent of Hunt and Hess grades, modified Fisher scales, aneurysm treatment modality, age, comorbidities, and hospital complications. Conclusion: Use of antiplatelets may not reduce risk of DCI and worse outcome but can be associated with longer ICU length of stay. Further studies are required to identify appropriate candidates who may benefit from antiplatelets.

Conditional Vasospasm-Free Survival Following Aneurysmal Subarachnoid Hemorrhage.

Following aneurysmal subarachnoid hemorrhage (SAH), patients are monitored closely for vasospasm in the intensive care unit. Conditional vasospasm-free survival describes the risk of future vasospasm as a function of time elapsed without vasospasm. Conditional survival has not been applied to this clinical scenario but could improve patient counseling and intensive care unit use. The objective of this study was to characterize conditional vasospasm-free survival following SAH. This was a single institution, retrospective cohort study of patients treated for aneurysmal SAH between 1/1/2000-6/1/2020. The primary outcome was the development of vasospasm defined by the first instance of either radiographic vasospasm on computed tomography angiography, Lindegaard Index > 3.0 by transcranial doppler ultrasonography, or vasospasm-specific intraarterial therapy. Multivariable Cox regression was performed, and conditional vasospasm-free survival curves were constructed. A total of 528 patients were treated for aneurysmal SAH and 309 (58.5%) developed vasospasm. Conditional survival curves suggest patients who survive to postbleed day 10 without vasospasm have a nearly 90% chance of being discharged without vasospasm. The median onset of vasospasm was postbleed day 6. Age more than 50years was associated with a lower risk (hazard ratio [HR] = .76; 95% confidence interval [CI] 0.64-0.91; p < 0.001). Higher initial systolic blood pressure (HR = 1.18; 95% CI 1.046-1.350; p = .008), Hunt-Hess grades 4 or 5 (HR = 1.304; 95% CI 1.014-1.676), and modified Fisher scale score of 4 (HR = 1.808; 95% CI 1.198-2.728) were associated with higher vasospasm than the respective lower grades. Conditional survival provides a useful framework for counseling patients and making decisions around vasospasm risk for patients with aneurysmal SAH, while risk factor-stratified plots facilitate a patient-centric, evidence-based approach to these conversations and decisions.

Relationship Between Baroreflex and Cerebral Autoregulation in Patients With Cerebral Vasospasm After Aneurysmal Subarachnoid Hemorrhage.

Introduction: Common consequences following aneurysmal subarachnoid hemorrhage (aSAH) are cerebral vasospasm (CV), impaired cerebral autoregulation (CA), and disturbance in the autonomic nervous system, as indicated by lower baroreflex sensitivity (BRS). The compensatory interaction between BRS and CA has been shown in healthy volunteers and stable pathological conditions such as carotid atherosclerosis. The aim of this study was to investigate whether the inverse correlation between BRS and CA would be lost in patients after aSAH during vasospasm. A secondary objective was to analyze the time-trend of BRS after aSAH.Materials and Methods: Retrospective analysis of prospectively collected data was performed at the Neuro-Critical Care Unit of Addenbrooke's Hospital (Cambridge, UK) between June 2010 and January 2012. The cerebral blood flow velocity (CBFV) was measured in the middle cerebral artery using transcranial Doppler ultrasonography (TCD). The arterial blood pressure (ABP) was monitored invasively through an arterial line. CA was quantified by the correlation coefficient (Mxa) between slow oscillations in ABP and CBFV. BRS was calculated using the sequential cross-correlation method using the ABP signal.Results: A total of 73 patients with aSAH were included. The age [median (lower-upper quartile)] was 58 (50–67). WFNS scale was 2 (1–4) and the modified Fisher scale was 3 (1–3). In the total group, 31 patients (42%) had a CV and 42 (58%) had no CV. ABP and CBFV were higher in patients with CV during vasospasm compared to patients without CV (p = 0.001 and p < 0.001). There was no significant correlation between Mxa and BRS in patients with CV, neither during nor before vasospasm. In patients without CV, a significant, although moderate correlation was found between BRS and Mxa (rS = 0.31; p = 0.040), with higher BRS being associated with worse CA. Multiple linear regression analysis showed a significant worsening of BRS after aSAH in patients with CV (Rp = −0.42; p < 0.001).Conclusions: Inverse compensatory correlation between BRS and CA was lost in patients who developed CV after aSAH, both before and during vasospasm. The impact of these findings on the prognosis of aSAH should be investigated in larger studies.

Initiating Mobilization Is Not Associated with Symptomatic Cerebral Vasospasm in Patients with Aneurysmal Subarachnoid Hemorrhage: A Retrospective Multicenter Case-control Study.

The study aim was to investigate the association between initiating mobilization within 7 days after onset and symptomatic cerebral vasospasm (SCV) in patients with aneurysmal subarachnoid hemorrhage (aSAH). This was a retrospective multicenter case-control study in Japan. Patients with a diagnosis of aSAH who underwent physical therapy with/without occupational therapy were included and categorized into 2 groups according to the presence or absence of SCV. Initiating mobilization was defined as sitting on the bed edge (at least once, with/without assist, regardless of duration) within 7 days after aSAH onset. Cox proportional hazards regression analysis was performed to evaluate the association between initiating mobilization within 7 days after onset and SCV. The analysis included 510 patients. Among all included patients, 57 (11.2%) patients had SCV. In the univariate Cox proportional hazards regression analysis, initiating of mobilization was not associated with SCV (hazard ratio [HR] = 0.78; 95% confidence interval [CI] = 0.45-1.32). In the multivariate analysis, only the modified Fisher scale was significantly associated with SCV (HR = 26.23; 95% CI = 1.21-571.0). Initiating mobilization within 7 days after aSAH onset was not associated with SCV in patients with aSAH.

Prospective Analysis of Cerebral Edema Admission and Clinical Outcome in Ruptured Intracranial Aneurysm.

To evaluate the association between global cerebral edema (GCE) after subarachnoid hemorrhage (SAH) and its impact on functional outcome evaluated by the modified Rankin scale (mRS). This is a prospective cohort study with patients who were admitted to the hospital due to SAH. During the period from January 2018 to November 2019, 107 patients with intracranial aneurysms were enrolled. Using univariate and multivariate analysis, we sought to identify predictors and evaluated the impact of GCE on outcome after 6 months using the mRS. GCE was present in 54 (50.5%) patients, of which 27 (25.2%) were mild, 20 (18.7%) moderate and 7 (6.5%) were severe. Univariate analysis identified high Hunt-Hess and Glasgow coma scale on clinical admission as predictors factors of GCE (p < 0.05), and higher modified Fisher scale as a radiological predictor of Glasgow coma scale (p < 0.05). Thirty-three (30.8%) patients were deceased at 6 months. Death or severe disability were predicted by higher age, poor clinical scale on admission and severe GCE (p < 0.05). GCE on admission is independently associated with poor clinical outcomes at discharge, and six months after SAH. Given its strong association with poor clinical grade on admission, GCE should be considered a straightforward and radiological important marker of early brain injury, with ominous implications.

Risk factors and outcome analysis of patients with intraoperative rupture (IOR) of ruptured cerebral aneurysm during microsurgical clipping

Purpose To analyse baseline characteristics of patients with intraoperative rupture (IOR) or non-IOR who underwent microsurgical clipping for ruptured intracranial aneurysms. Additionally, to asses functional outcome in terms of Glasgow Outcome Scale (GOS) at 6 and 12 months. Methods A retrospective analysis of 471 patients who underwent microsurgical clipping for ruptured intracranial aneurysms from 2007 to 2018 in Nepal Mediciti Hospital, Nepal. Patients who underwent surgery for unruptured aneurysm were excluded from the study. The association of the base line characteristic in IOR and non-IOR were analysed. Variables analysed were the Hunt and Hess Scale (HHS) dichotomized as (1–3) and (4–5), Modified Fisher Scale dichotomized as (0–2) and (3–4), type of rupture, use of brain retractor, timing of IOR during surgery, aneurysmal factors (size of the neck, location, lobulation) and time of surgery. Outcome, GOS dichotomized into favourable (4–5) and unfavourable (1–3), assessed at 6 months and 12 months. Results Out of 471 patients treated for ruptured intracranial aneurysm, IOR occurred in 57 (12.10%) with mean age 49.47 (SD ±12.9), occurred more in smoker than non-smoker (45.6% vs. 18.6%; p=.000) and regular alcohol consumers (36.8% vs. 17.9%; p=.004). Favourable outcome with GOS (4–5) at 6 months was observed among patients with lower HHS (1–3), p=.025 and lower MFS (0–2), p=.04. However, outcome at 12 months was better associated with MFS (p=.013) and aneurysm size (p=.038), with more favourable outcome associated with aneurysm less than 10 mm. Conclusions Alcohol consumption and smoking are associated risk factors that may contribute to IOR. HHS and MFS are strong predictors of outcome for IOR patients at 6 months. However, at 12 months, MFS is more predictive of outcome. Aneurysms greater than 10 mm had a strong association with outcome at 12 months than 6 months.

Predictors of Opiate Utilization in the Treatment of Headache and Impact on Three-Month Outcomes Following Subarachnoid Hemorrhage.

Despite multiple investigational drugs, headache due to subarachnoid hemorrhage (SAH) remains inadequately controlled and requires high opiate utilization. This study investigates the factors associated with increased opiate usage for the management of headache in SAH in the first 14 days of admission, the association between opiate usage and hospital length of stay, and the incidence of opiate consumption during the outpatient follow up.This is a single-center cross-sectional study. A total of 138 patients admitted between January 1, 2017, and May 31, 2019, with a diagnosis of SAH, were identified through a neurocritical care dashboard. Outpatient electronic medical records were evaluated at three months. Statistical analysis included descriptive statistics, Mann-Whitney U test, stepwise regression, and multiple regression analysis.We found that of 138 patients, the majority (90%) were prescribed opiates during their hospitalization, and the mean daily morphine equivalent dosage was 18.74 mg. Steroid usage was associated with an increase in 14-day opiate usage (r = 0.4, p = 0.0001); however, the cerebral spinal fluid profile did not show a statistically significant correlation. Over 14 days, smokers significantly used more opiates compared to nonsmokers (353 mg vs. 184 mg, p = 0.01). In addition, peri-mesencephalic SAH required less morphine compared to aneurysmal SAH (195 mg vs. 283 mg, p = 0.004). Aneurysm clipping was associated with less opiate usage compared to aneurysm coiling (186 vs. 320, p = 0.08).Only the high Hunt and Hess scale score predicted opiate usage, and the high modified Fisher scale score, aneurysmal SAH, and more opiate usage predicted hospital length of stay. A total of 48 patients (42%) suffered from headaches during their outpatient follow-up within three months of discharge; however, only six (5%) were still on opiates. There was a significant association between the amount of opiate used in the first 14 days of admission and the rate of post-discharge headache.In summary, even though patients admitted with SAH require a large amount of opiate for headache management, this did not lead to more opiate consumption in the outpatient setting. However, patients continued to suffer from headaches at three months follow-up. This high opiate consumption is associated with increased hospital length of stay. Studies are needed to identify opiate sparing analgesics that target the pathogenesis of headaches in this patient population.

Applied forecasting for delayed cerebral ischemia prediction post subarachnoid hemorrhage: Methodological fallacies

IntroductionDelayed Cerebral Ischemia (DCI) is an important cause of morbidity and mortality after aneurysmal Subarachnoid Hemorrhage (aSAH). Researchers have utilized various methods for predicting patients at risk for DCI progression. MethodsAn eight-year retrospective review of aSAH patients who presented to St Louis University Hospital. The records were screened for demographic, clinical, and radiographic parameters. DCI was the primary outcome. We identified 16 features to fit various forecasting models and selected the best binary classifier through comprehensive machine learning (ML) workflows. Regression and ensemble tree-based algorithms were utilized, based on their performance on tabular data. We investigated whether a single model could outperform in our dataset. Due to the expected outcome class imbalance (DCI), we selected precision, recall, and F-score as threshold metrics. Precision-recall curves were used for model performance ranking. ResultsOf the 213 aSAH patients analyzed, 42 progressed to DCI (19.7%). The mean age was 55.7 years. The outcome variable (DCI) was imbalanced with a class ratio of 1:4. Bivariate analysis revealed two significant associations: The “Hunt-and-Hess scale” (p-value = 0.016), and “Posthemorrhagic hydrocephalus” (p-value < 0.001). The all-relevant important factors during feature selection were: “Fisher scale,” “Modified Fisher scale,” “Hunt-and-Hess scale,” and “Posthemorrhagic hydrocephalus”. “Treatment type” was tentative. The random forests model achieved a pooled accuracy of 71.1% (95%CI: 60.4, 83.4) with an F1-score of 0.484. The best binary classifier utilized extreme gradient boosting while trained on the all-relevant predictors plus “Aneurysm type.” Extreme gradient boosting achieved a predictive accuracy of 84.3% (95%CI: 75.9, 93.4) with an F1-score of 0.684. We describe the challenges that arise during training of a binary classifier on imbalanced datasets, and, while going through an extensive comparison review of similar published studies, we not only demonstrate the model's performance but also identify multiple forecasting methodological fallacies in neurological research. ConclusionBy implementing baseline patient characteristics combined with radiographic grading scales, we built a simple yet robust, highly accurate—but, most importantly—useful binary classifier for DCI prediction. The model is available online, and it can be utilized clinically as an effective forecasting tool (https://georgiosalexopoulos.shinyapps.io/download/).

Predictive effects of admission white blood cell counts and hounsfield unit values on delayed cerebral ischemia after aneurysmal subarachnoid hemorrhage

ObjectiveNeuroinflammatory response is deemed the primary pathogenesis of delayed cerebral ischemia (DCI) caused by aneurysmal subarachnoid hemorrhage (aSAH). Both white blood cell (WBC) count and Hounsfield Unit (HU) are gradually considered can reflect inflammation in DCI. This study aims to identify the relationship between WBC count and HU value and investigate the effects of both indicators in predicting DCI after aSAH. MethodsWe enrolled 109 patients with aSAH admitted within 24 h of onset in our study. A multivariate logistic regression analysis was used to evaluate the admission WBC count, HU value, and combined WBC-HU associated with DCI. The receiver operating characteristic curve and area under the curve (AUC) were used to determine thresholds and detect the predictive ability of these predictors. These indicators were also compared with the established inflammation markers. ResultsThirty-six (33%) patients developed DCI. Both WBC count and HU value were strongly associated with the admission glucose level (ρ = .303, p = .001; ρ = .273, p = .004), World Federation of Neurosurgical Societies grade (ρ = .452, p < .001; ρ = .578; p < .001), Hunt-Hess grade (ρ = .450, p < .001; ρ = .510, p < .001), and modified Fisher scale score (ρ = .357, p < .001; ρ = .330, p < .001). After controlling these public variables, WBC count (ρ = .300, p = .002) positively correlated with HU value. An early elevated WBC (odds ratio [OR] 1.449, 95% confidence interval [CI]: 1.183–1.774, p < .001) count and HU value (OR 1.304, 95%CI: 1.149–1.479, p < .001) could independently predict the occurrence of DCI. However, only these patients with both WBC count and HU value exceeding the cut-off points (OR 36.89, 95%CI: 5.606–242.78, p < .001) were strongly correlated with DCI. Compared with a single WBC count (AUC 0.811, 95%CI: 0.729–0.892, p < .001) or HU value (AUC 0.869, 95%CI: 0.803–0.936, p < .001), the combined WBC-HU (AUC 0.898, 95%CI: 0.839–0.957, p < .001) demonstrated a better ability to predict the occurrence of DCI. Inspiringly, the prediction performance of these indicators outperformed the established inflammatory markers. ConclusionAn early elevated WBC count and HU value could independently predict DCI occurrence between 4 and 30 days after aSAH. Furthermore, WBC count was positively correlated with HU value, and the combined WBC-HU demonstrated a superior prediction ability for DCI development compared with the individual indicator.

Systemic Immune-Inflammation Index Predicts Delayed Cerebral Vasospasm After Aneurysmal Subarachnoid Hemorrhage.

Delayed cerebral vasospasm is a feared complication of aneurysmal subarachnoid hemorrhage (SAH). To investigate the relationship of systemic inflammation, measured using the systemic immune-inflammation (SII) index, with delayed angiographic or sonographic vasospasm. We hypothesize that early elevations in SII index serve as an independent predictor of vasospasm. We retrospectively reviewed the medical records of 289 SAH patients for angiographic or sonographic evidence of delayed cerebral vasospasm. SII index [(neutrophils × platelets/lymphocytes)/1000] was calculated from laboratory data at admission and dichotomized based on whether or not the patient developed vasospasm. Multivariable logistic regression and receiver operating characteristic (ROC) analysis were performed to determine the ability of SII index to predict the development of vasospasm. A total of 246 patients were included in our study, of which 166 (67.5%) developed angiographic or sonographic evidence of cerebral vasospasm. Admission SII index was elevated for SAH in patients with vasospasm compared to those without (P<.001). In univariate logistic regression, leukocytes, neutrophils, lymphocytes, neutrophil-lymphocyte ratio (NLR), and SII index were associated with vasospasm. After adjustment for age, aneurysm location, diabetes mellitus, hyperlipidemia, and modified Fisher scale, SII index remained an independent predictor of vasospasm (odds ratio 1.386, P=.003). ROC analysis revealed that SII index accurately distinguished between patients who develop vasospasm vs those who do not (area under the curve=0.767, P<.001). Early elevation in SII index can independently predict the development of delayed cerebral vasospasm in aneurysmal SAH.

Нарушение осмотического баланса в условиях нетравматического субарахноидального кровоизлияния

Актуальность. Аневризматическое субарахноидальное кровоизлияние является распространенным и серьезным заболеванием, которое может приводить к летальным последствиям. Цель исследования: изучить динамику натриемии в контексте ее клинико-патогенетического значения у пациентов с субарахноидальным кровоизлиянием. Материалы и методы. Обследовано 87 пациентов с субарахноидальным кровоизлиянием, из них 38 (43,68 %) — с изолированным субарахноидальным кровоизлиянием, 14 (16,09 %) — с субарахноидально-паренхиматозным, 29 (33,33 %) — с субарахноидально-желудочковым, 6 (6,9 %) — с субарахноидально-паренхиматозно-желудочковым кровоизлиянием, общее количество смешанных кровоизлияний составляло 56,32 %. Для проведения полного ангиографического исследования использовали ангиографический комплекс AXIOM Artis MP «Siemens». Результаты. Исследование SIADH-синдрома (синдром неадекватной секреции антидиуретического гормона) с развитием гипонатриемии у пациентов с субарахноидальным кровоизлиянием нетравматического генеза свидетельствует о тесной ассоциации между выраженностью нарушений осмотического гомеостаза и тяжестью клинического течения субарахноидального кровоизлияния согласно модифицированной шкале Fisher, шкале WFNS, шкале Нunt &amp; Неss, шкале результатов GOSE (Glasgow Outcome Scale Extended) и обобщающей классификационной шкале для оценки прогноза исхода субарахноидального кровоизлияния (Ogilvy C.S. et Carter B.S.). У лиц с гипонатриемией на фоне субарахноидального кровоизлияния сопряженность сывороточного уровня натрия и показателя сывороточного уровня копептина адекватно и достоверно аппроксимируется уравнением регрессии логарифмического характера (по основанию 10), при значениях копептина более 0,70 нг/мл в более чем 50 % случаев регистрировалась натриемия средней тяжести. Выводы. Была обнаружена достоверная тесная взаимосвязь между уровнем данного пептида с нейроэндокринными свойствами — копептина и нарушением осмотического гомеостаза ионов натрия на фоне субарахноидального кровоизлияния с различной тяжестью клинического течения.

Transcranial-Doppler-Measured Vasospasm Severity is Associated with Delayed Cerebral Infarction After Subarachnoid Hemorrhage.

Angiographic vasospasm after aneurysmal subarachnoid hemorrhage (aSAH) is associated with delayed cerebral ischemia (DCI)-related cerebral infarction (radiological DCI) and worsened neurological outcome. Transcranial Doppler (TCD) measurements of cerebral blood flow velocity are commonly used after aSAH to screen for vasospasm; however, their association with cerebral infarction is not well characterized. We sought to determine whether time-varying TCD-measured vasospasm severity is associated with cerebral infarction and investigate the performance characteristics of different time/severity cutoffs for predicting cerebral infarction. We conducted a retrospective single-center cohort study of consecutive adult patients with aSAH with at least one TCD study between 2011 and 2020. The primary outcome was radiological DCI, defined as a cerebral infarction developing at least 2days after any surgical or endovascular intervention without an alternative cause. Cox proportional hazards models were used to examine associations between time-varying vasospasm severity and radiological DCI. Optimal TCD-based time/severity thresholds for predicting radiological DCI were then determined. Of 262 patients with aSAH who underwent TCD studies, 27 (10%) developed radiological DCI. Patients with radiological DCI had higher modified Fisher scale scores and trended toward earlier onset of vasospasm. Adjusted for age, Hunt and Hess scores, and modified Fisher scale scores, the worst-vessel vasospasm severity was associated with radiological DCI (adjusted hazard ratio 1.7 [95% confidence interval 1.1-2.4]). Vasospasm severity within a specific vessel was associated with risk of delayed infarction in the territory supplied by that vessel. Optimal discrimination of patients with radiological DCI was achieved with thresholds of mild vasospasm on days 4-5 or moderate vasospasm on days 6-9, with negative predictive values greater than 90% and positive predictive values near 20%. TCD-measured vasospasm severity is associated with radiological DCI after aSAH. An early, mild TCD-based vasospasm severity threshold had a high negative predictive value, supporting its role as a screening tool to identify at-risk patients.

Abstract 1122‐000164: Peri‐embolization Use of Stent Retrievers as a Rescue Tool in Patients with Subarachnoid Hemorrhage

Introduction : Coil migration after endovascular embolization of intracranial aneurysms is one of the periprocedural complications in 2–6% of patients. Stent retriever use is well‐established in treatment of ischemic stroke but has not been well established to address coil retrieval as rescue therapy. We describe three cases with successful removal of migrated coils using stent retrievers. Methods : A retrospective review at a single center university hospital was performed for all Neuro‐endovascular case log from December 2018 to November 2020. Cases of coil migration were reviewed and coil retraction with Stent Retriever with successful coil mass extraction was considered an endpoint. Number of attempts, types of stent retrievers used and time taken for extraction were noted. Results : Case 1: 56‐year‐old female presented with ruptured tri‐lobed 4 × 3 mm Anterior communicating artery aneurysm. Hunt and Hess (H&amp;H) Grade 2. Modified Fisher scale (MFS) 4. Underwent primary coil embolization. Two 2mmx2cm Galaxy Orbit coils were deployed within aneurysm. During deployment of third coil the first two coils displaced out of the aneurysm migrating into left A2 segment. Stryker’s Trevo 3 × 20 mm stent retriever was used for retrieval of coils however they dislodged at the left internal carotid artery (ICA) terminus and migrated distally into the left middle cerebral artery (MCA) M2 superior division. Subsequently, Medtronic’s Solitaire 4 × 40 mm stent retriever was successfully deployed retrieving the migrated coils with full recanalization. Case 2: 64‐year‐old female presented with ruptured 3 × 5.3 mm right posterior communicating artery (Pcom) aneurysm. H&amp;H 5 and MFS 4. Underwent primary coil embolization with placement of Galaxy Orbit 2.5mmx3.5cm coil. On follow up run, coil mass had migrated into the origin of right fetal Pcom. Migrated coil was successfully retrieved using Stryker’s 4 × 40 mm stent retriever with complete recanalization. Case 3: 65‐year‐old female with presented ruptured 8.5 × 6.8 mm right supraclinoid ICA irregular aneurysm. H&amp;H Grade 1. MFS 3. Underwent primary coil embolization with one Galaxy coil (5mm x 10cm) with plan for future flow diversion. Two weeks later, patient experienced acute neurological worsening with new left sided hemiparesis and right gaze deviation. Imaging revealed acute occlusion of right middle cerebral artery M1 segment occlusion with thrombosed migrated coil. Patient underwent retrieval of the coil and superimposed thrombus utilizing Stryker’s Trevo (4*30 mm) stent retriever with resultant full recanalization. Conclusions : These cases demonstrate successful endovascular mechanical removal of migrated coils using stent retrievers. They add to the limited experience of stent retrievers utilization as effective tools for dealing with such complications.

Increase in Brain Volume After Aneurysmal Subarachnoid Hemorrhage Leads to Unfavorable Outcome: A Retrospective Study Quantified by CT Scan.

Background and Purpose: Primary brain swelling occurs in aneurysmal subarachnoid hemorrhage (aSAH) patients. The absence of a dynamic quantitative method restricts further study of primary brain swelling. This study compared differences in the change rate of brain volume (CRBV) between patients with and without primary brain swelling in the early stage of aSAH. Moreover, the relationship between CRBV and clinical outcomes was evaluated.Methods: Patients hospitalized within 24 h after aSAH were included in this retrospective study. Utilizing a qualitative standard established before the study to recognize primary brain swelling through brain CT after aSAH, clinical outcomes after 3 months of SAH were evaluated with a modified Rankin scale (mRS). The brain volume (BV) of each patient was calculated with a semiautomatic threshold algorithm of 3D-slicer, and the change in brain volume (CIBV) was obtained by subtracting the two extreme values (CIBV = BVmax – BVmin). The CRBV was obtained by CIBV/BVmin × 100%. The CRBV values that predicted unfavorable prognoses were estimated.Results: In total, 130 subjects were enrolled in the study. The mean CRBV in the non-swelling group and swelling group were 4.37% (±4.77) and 11.87% (±6.84), respectively (p < 0.05). CRBV was positively correlated with the length of hospital stay, blood in the ambient cistern, blood in the lateral ventricle, and lateral ventricular volume (Spearman ρ = 0.334; p < 0.001; Pearson ρ = 0.269, p = 0.002; Pearson ρ = 0.278, p = 0.001; Pearson ρ = 0.233, p = 0.008, respectively). Analysis of variance showed significant differences in CIBV, CRBV, blood in the ambient cistern, blood in the lateral ventricle, and lateral ventricular volume among varying modified Fisher scale (mFisher), with higher admission mFisher scale, indicating larger values of these variables. After adjusting for risk factors, the model showed that for every 1% increase in the CRBV, the probability of poor clinical prognosis increased by a factor of 1.236 (95% CI = 1.056–1.446). In the stratified analysis, the odds of worse clinical outcomes increased with increases in the CRBV. Receiver operating characteristic curve analysis showed that HH grade, mFisher scale, and score of CRBV (SCRBV) had diagnostic performance for predicting unfavorable clinical outcomes.Conclusion: Primary brain swelling increases brain volume after aSAH. The CRBV quantified by 3D-Slicer can be used as a volumetric representation of the degree of brain swelling. A larger CRBV in the early stage of aSAH is associated with poor prognosis. The CRBV can be used as a neuroimaging biomarker of early brain injury after bleeding and may be an effective predictor of patients' clinical prognoses.

Clusters Across Multiple Domains of Health-Related Quality of Life Reveal Complex Patient Outcomes After Subarachnoid Hemorrhage.

Patients with subarachnoid hemorrhage were prospectively identified. Clinical data were prospectively recorded. Health-related quality of life was prospectively assessed at 3-month follow-up using the National Institutes of Health Patient Reported Outcomes Measurement Information System and neuro-quality of life in the domains of mobility, cognitive function, satisfaction with social roles, and depression. We used k-means clustering to analyze prospectively recorded health-related quality of life data, identifying clusters of complex patient outcomes. Decision tree analysis identified index hospital stay factors predictive of a patient having a particular complex patient outcome at follow-up. Academic medical center. One hundred three survivors of subarachnoid hemorrhage. None. We analyzed 103 patients, of whom 75 (72.8%) were female, and mean age was 53.6 ± 13.4 years. There were three complex patient outcomes: health-related quality of life greater than 1 sd better than the U.S. mean across all domains (n = 23, 22.3%), health-related quality of life greater than 1 sd worse than U.S. mean across all domains (n = 26, 25.2%), and satisfaction with social roles greater than 0.5 sd worse than U.S. mean with cognitive function, depression, and mobility scores near the U.S. mean (n = 54, 52.4%). In decision tree analysis, hospital disposition and Hunt and Hess Grade were associated with complex patient outcome. Complex patient outcomes across multiple domains of health-related quality of life at follow-up after subarachnoid hemorrhage are distinct and may be predictable.

Admission serum high mobility group box 1 (HMGB1) protein predicts delayed cerebral ischemia following aneurysmal subarachnoid hemorrhage.

High mobility group box 1 protein (HMGB1) is a prototypical damage associated particle and acts as a key player in aseptic inflammation. HMGB1 appears critical for the crosstalk of a prothrombotic and proinflammatory state that is implicated in mediating and exacerbating ischemic brain injury. The role of HMGB1 in aneurysmal subarachnoid hemorrhage (aSAH) remains to be elucidated. A prospective, single blinded observational study was designed to investigate the role of HMGB1 in aSAH. Serial serum HMGB1 level quantification on admission day 0, 4, 8, and 12 was performed. Primary outcome measures were delayed cerebral ischemia (DCI - new infarction on CT) and poor functional outcome (90-day modified Rankin Scale 4-6). The role of HMGB1 levels for DCI, functional outcome and radiological vasospasm prediction was analyzed. Collectively, 83 aSAH patients were enrolled. Five patients died within 48h. In 29/78 patients (37.2%), DCI was identified. In multivariable analysis, radiological vasospasm and admission HMGB1 were independent predictors for DCI. Younger age and higher white blood cell count, but not insult burden (World Federation of Neurosurgical Societies scale, modified Fisher scale, intraparenchymal or intraventricular hematoma existence) correlated with admission HMGB1 levels. Serial HMGB1 levels did not differ between patients with or without DCI, poor functional outcome or radiological vasospasm development. Admission serum HMGB1 does not reflect initial insult burden but serves as an independent biomarker predictive of DCI. Further studies are warranted to disentangle the role of HMGB1 surrounding the sequelae of aSAH.

Isofurans and Isoprostanes as Potential Markers of Delayed Cerebral Ischemia Following Aneurysmal Subarachnoid Hemorrhage: A Prospective Observational Study.

F2-Isoprostanes (F2-IsoPs) and Isofurans (IsoF), specific markers of lipid peroxidation in vivo, have been reported to be elevated and have prognostic implications following subarachnoid hemorrhage (SAH). Platelet activation and vasoconstriction are attributed to these compounds. Elevated IsoF to F2-IsoPs ratios have been proposed as in vivo biomarkers of mitochondrial dysfunction. In this pilot study, we examined their performance as specific biomarkers for delayed cerebral ischemia (DCI) development following SAH. Eighteen patients with SAH and six controls with normal neuroimaging and cerebrospinal fluid (CSF) analysis results underwent CSF sampling and abstraction of clinical, demographic, and laboratory data. Samples (two) of CSF were collected on day 1 and once on days 5-8 post bleed. F2-IsoP and IsoF assays were performed by gas chromatography/mass spectroscopy methods. Levels are expressed in median (interquartile range) for nonnormally distributed data. Repeated sample measurements were compared using the Wilcoxon signed-rank test, whereas the Mann-Whitney U-test was used for other nonnormally distributed data. Mean age was 61 ± 15.7 (SAH cases) versus 48 ± 10 (controls) years, and 80% of patients with SAH were women. Median Hunt and Hess score was 3 (2-4), and modified Fisher scale was 3 (3-4). Thirty nine percent of patients developed DCI. F2-IsoP were significantly higher in SAH cases than in controls [47.5 (30.2-53.5) vs. 26.0 (21.2-34.5) pg/mL]. No significant differences were observed in patients with or without DCI [41 (33.5-52) vs. 44 (28.5-55.5) pg/mL]. IsoF were elevated in the second CSF sample in nine patients but were undetectable in the remainder cases and all controls. Patients who developed DCI had significantly higher IsoF than those who did not [57 (34-72) vs. 0 (0-34) pg/mL]. Patients who met criteria for DCI had a significantly higher IsoF to F2IsoPs ratio on the late CSF sample [1.03 (1-1.38) vs. 0 (0-0.52)]. Preliminary findings from this study suggest that IsoF may represent a specific biomarker predicting DCI following SAH. Future studies to further explore the value of IsoF as biomarkers of secondary brain injury following SAH seem warranted.

Relationship between aneurysmal location in subarachnoid hemorrhagic patients and both blood clot thickness and radiological vasospasm

Objective The aim was to detect the relationship between site of cerebral aneurysms and the amount of blood in computerized tomography and liability for early vasospasm using transcranial Doppler (TCD). Background The mortality with subarachnoid hemorrhage (SAH) is associated with cerebral vasospasm, rebreeding hydrocephalus, and seizures. Patients and methods This randomized controlled clinical trial recruited 30 patients from both sexes with acute aneurysmal SAH. Patients were recruited from Matarya Teaching Hospital during the period from October 2018 to June 2019. Outcome was assessed by Glasgow coma scale, Hunt and Hess scale (HHS), and modified Fisher scale (MFS). Patients were followed up by TCD on first, third, fifth, seventh, and 10th day of appearance of symptoms. Results There was no significant difference between cases with positive vasospasm vs negative vasospasm regarding age and sex. There was a significant association between early vasospasm and hypertension (P = 0.001), as well as smoking (P = 0.007). There was a significant difference between cases with positive vasospasm vs negative vasospasm regarding systolic blood pressure and diastolic blood pressure and glycosylated hemoglobin. There is a significant association between early vasospasm and symptomatic to vasospasm (P = 0.018). There was a significant difference between cases with positive vasospasm vs negative vasospasm regarding Glasgow coma scale, HHS, and MFS (P = 0.001 for all). Conclusion Continuous TCD measurements are valuable methods for early detection of vasospasm following SAH. Glasgow coma scale, HHS, MFS, aneurysmal size, aneurysmal site, systolic blood pressure and diastolic blood pressure, and glycosylated hemoglobin seem to be important predictors for vasospasm severity.