Delays in the diagnosis and surgical treatment of drug-resistant epilepsy: A cohort study.

OBJECTIVE: Delay in referral for epilepsy surgery of patients with drug-resistant epilepsy (DRE) is associated with decreased quality of life, worse surgical outcomes, and increased risk of sudden unexplained death in epilepsy (SUDEP). Understanding the potential causes of delays in referral and treatment is crucial for optimizing the referral and treatment process. We evaluated the treatment intervals, demographics, and clinical characteristics of patients referred for surgical evaluation at our level 4 epilepsy center in the U.S. Intermountain West. METHODS: We retrospectively reviewed the records of patients who underwent surgery for DRE between 2012 and 2022. Data collected included patient demographics, DRE diagnosis date, clinical characteristics, insurance status, distance from epilepsy center, date of surgical evaluation, surgical procedure, and intervals between different stages of evaluation. RESULTS: Within our cohort of 185 patients with epilepsy (99 female, 53.5%), the mean ± standard deviation (SD) age at surgery was 38.4 ± 11.9 years. In this cohort, 95.7% of patients had received definitive epilepsy surgery (most frequently neuromodulation procedures) and 4.3% had participated in phase 2 intracranial monitoring but had not yet received definitive surgery. The median (1st-3rd quartile) intervals observed were 10.1 (3.8-21.5) years from epilepsy diagnosis to DRE diagnosis, 16.7 (6.5-28.4) years from epilepsy diagnosis to surgery, and 1.4 (0.6-4.0) years from DRE diagnosis to surgery. We observed significantly shorter median times from epilepsy diagnosis to DRE diagnosis (p < .01) and epilepsy diagnosis to surgery (p < .05) in patients who traveled further for treatment. Patients with public health insurance had a significantly longer time from DRE diagnosis to surgery (p < .001). SIGNIFICANCE: Both shorter distance traveled to our epilepsy center and public health insurance were predictive of delays in diagnosis and treatment intervals. Timely referral of patients with DRE to specialized epilepsy centers for surgery evaluation is crucial, and identifying key factors that may delay referral is paramount to optimizing surgical outcomes.

Impact of premorbid oral anticoagulant use on survival in patients with traumatic intracranial hemorrhage.

OBJECTIVE: Although oral anticoagulant use has been implicated in worse outcomes for patients with a traumatic brain injury (TBI), prior studies have mostly examined the use of vitamin K antagonists (VKAs). In an era of increasing use of direct oral anticoagulants (DOACs) in lieu of VKAs, the authors compared the survival outcomes of TBI patients on different types of premorbid anticoagulation medications with those of patients not on anticoagulation. METHODS: The authors retrospectively reviewed the records of 1186 adult patients who presented at a level I trauma center with an intracranial hemorrhage after blunt trauma between 2016 and 2022. Patient demographics; comorbidities; and pre-, peri-, and postinjury characteristics were compared based on premorbid anticoagulation use. Multivariable Cox proportional hazards regression modeling of mortality was performed to adjust for risk factors that met a significance threshold of p < 0.1 on bivariate analysis. RESULTS: Of 1186 patients with a traumatic intracranial hemorrhage, 49 (4.1%) were taking DOACs and 53 (4.5%) used VKAs at the time of injury. Patients using oral anticoagulants were more likely to be older (p < 0.001), to have a higher Charlson Comorbidity Index (p < 0.001), and to present with a higher Glasgow Coma Scale (GCS) score (p < 0.001) and lower Injury Severity Score (ISS; p < 0.001) than those on no anticoagulation. Patients using VKAs were more likely to undergo reversal than patients using DOACs (53% vs 31%, p < 0.001). Cox proportional hazards regression demonstrated significantly increased hazard ratios (HRs) for VKA use (HR 2.204, p = 0.003) and DOAC use (HR 1.973, p = 0.007). Increasing age (HR 1.040, p < 0.001), ISS (HR 1.017, p = 0.01), and Marshall score (HR 1.186, p < 0.001) were associated with an increased risk of death. A higher GCS score on admission was associated with a decreased risk of death (HR 0.912, p < 0.001). CONCLUSIONS: Patients with a traumatic intracranial injury who were on oral anticoagulant therapy before injury demonstrated higher mortality rates than patients who were not on oral anticoagulation after adjusting for age, comorbid conditions, and injury presentation.

Robotic Spine Surgery: Systematic Review of Common Error Types and Best Practices.

BACKGROUND AND OBJECTIVES: Robotic systems have emerged as a significant advancement in the field of spine surgery. They offer improved accuracy in pedicle screw placement and reduce intraoperative complications, hospital length of stay, blood loss, and radiation exposure. As the use of robotics in spine surgery continues to grow, it becomes imperative to understand common errors and challenges associated with this new and promising technology. Although the reported accuracy of robot-assisted pedicle screw placement is very high, the current literature does not capture near misses or incidental procedural errors that might have been managed during surgery or did not alter treatment of patients. We evaluated errors that occur during robot-assisted pedicle screw insertion and identify best practices to minimize their occurrence. METHODS: In this systematic review, we characterized 3 types of errors encountered during robot-assisted pedicle screw insertion-registration errors, skiving, and interference errors-that have been reported in the literature. RESULTS: Our search yielded 13 relevant studies reporting robot-assisted screw errors. Nine studies reported registration errors, with 60% of failed screws in those studies caused by registration issues. Seven studies highlighted skiving errors; 26.8% of the failed screws in those studies were caused by skiving. Finally, interference errors were reported in 4 studies, making up 19.5% of failed screws. CONCLUSION: On the basis of these findings, we suggest best practices-including close attention to preoperative planning, patient positioning, image registration, and equipment selection-to minimize the occurrence of these errors. Awareness of how errors occur may increase the safety of this technology.

Socioeconomic and Racial Disparities Affect Access to High-Volume Centers During Meningioma Treatment.

BACKGROUND: Studies examining the relationship among hospital case volume, socioeconomic determinants of health, and patient outcomes are lacking. We sought to evaluate these associations in the surgical management of intracranial meningiomas. METHODS: We queried the National Inpatient Sample (NIS) database for patients who underwent craniotomy for the resection of meningioma in 2013. We categorized hospitals into high-volume centers (HVCs) or low-volume centers (LVCs). We compared outcomes in 2016 to assess the potential impact of the Affordable Care Act on health care equity. Primary outcome measures included hospital mortality, length of stay, complications, and disposition. RESULTS: A total of 10,270 encounters were studied (LVC, n = 5730 [55.8%]; HVC, n = 4340 [44.2%]). Of LVC patients, 62.9% identified as white compared with 70.2% at HVCs (P < 0.01). A higher percentage of patients at LVCs came from the lower 2 quartiles of median household income than did patients at HVCs (49.9% vs. 44.2%; P < 0.001). Higher mortality (1.3% vs. 0.9%; P = 0.041) was found in LVCs. Multivariable regression analysis showed that LVCs were significantly associated with increased complication (odds ratio, 1.36; 95% confidence interval, 1.30-1.426, P<0.001) and longer hospital length of stay (odds ratio, -0.05; 95% confidence interval, -0.92 to -0.45; P <0.001). There was a higher proportion of white patients at HVCs in 2016 compared with 2013 (67.9% vs. 72.3%). More patients from top income quartiles (24.2% vs. 40.5%) were treated at HVCs in 2016 compared with 2013. CONCLUSIONS: This study found notable racial and socioeconomic disparities in LVCs as well as access to HVCs over time. Disparities in meningioma treatment may be persistent and require further study.

Demographics of focused ultrasound thalamotomy for essential tremor and trends in deep brain stimulation surgery after its introduction in the USA.

Background: Essential tremor (ET) is a movement disorder that affects 4%-5% of adults >65 years. For patients with medically refractory ET, neurosurgical interventions such as deep brain stimulation (DBS) and unilateral MR-guided focused ultrasound thalamotomy (MRgFUS) are available. In this retrospective cohort study, we examined the demographics of patients with ET who have received MRgFUS and evaluated trends in DBS usage in the USA after the introduction of MRgFUS in 2016. Methods: We used multiple databases to examine the demographics of patients who received DBS and MRgFUS, and trends in DBS. To assess the demographics, we queried the TriNetX database from 2003 to 2022 to identify patients diagnosed with ET and stratify them by DBS or MRgFUS treatment by using Current Procedural Terminology codes. Patient demographics were reported as frequencies and percentages. To examine the trends in DBS for ET, the yearly frequency of DBS procedures done for ET between 2012 and 2019 was extracted from the National Inpatient Sample (NIS) database, and breakpoint analysis was performed. Additionally, the yearly frequency of MRgFUS procedures for ET was obtained from Insightec Exlabate. Results: Most of the patients (88.69%) in the cohort extracted from TriNetX database self-identified as white, followed by black or African American (2.40%) and Asian (0.52%). A higher percentage of black patients received MRgFUS treatment than DBS (4.10% vs 1.88%). According to the NIS database, from 2012 to 2020, 13 525 patients received DBS for ET. Conclusion: This study provides an overview of the characteristics of patients who undergo DBS or MRgFUS. We found notable differences in sex and race among patients who underwent each treatment type. Additionally, until at least the beginning of 2020, the number of DBS procedures for ET was not negatively affected after the introduction of MRgFUS.

Radiographic abnormalities and their clinical significance in patients with Parkinson disease who receive deep brain stimulation implants.

OBJECTIVE: Preoperative MR images obtained in patients with Parkinson disease (PD) undergoing deep brain stimulation (DBS) often reveal incidental radiographic abnormalities (RAs). These findings range from small changes to gross pathologies. The effect of these findings on patients' clinical outcomes is unknown. The authors characterized RAs in patients with PD who underwent DBS and assessed clinical outcomes. METHODS: Records of patients at the authors' institution with PD who underwent MRI for DBS electrode implantation from 2010 through 2022 were reviewed. RAs were identified from the official preoperative MRI reports. RAs were grouped into four general categories (ischemic changes, atrophy or degenerative changes [ADCs], structural abnormalities, and tumors) and correlated with clinical outcomes (including subjective clinical response, levodopa equivalent dose [LED], and Unified Parkinson's Disease Rating Scale Part III [UPDRS] score) at the 1-year and last available follow-ups. RESULTS: In this review, 160 patients were identified for initial analysis, with 135 presenting with ≥ 1 RAs. Of these 135 patients, 69.4% (111/160) had ischemic vascular changes, 39.4% (63/160) had ADCs, 16.9% (27/160) had structural changes, and 1.9% (3/160) had tumors. No differences in preoperative LED or UPDRS score were observed between these groups. After DBS, no differences in outcomes were observed between patients with RAs and those without RAs for both the 1-year and last follow-up time points, including mortality rates and times. Structural lesions were associated with lower mortality rates (OR 0.1, p = 0.04). ADCs were associated with a worse subjective clinical response at the 1-year (OR 0.50, p = 0.04) and last (OR 0.49, p = 0.03) follow-ups, but subjectively worse responses were not correlated with worse objective outcome measures. CONCLUSIONS: Most RAs have no significant effect on clinical outcomes in PD patients undergoing DBS. Generalized ADCs may be associated with poorer subjective responses and may warrant further discussion with the patient if diagnosed on preoperative MRI.

Biophysiologic Monitoring for the Neurosurgical Patient.

Biophysiologic monitoring exists as a method of collecting objective information about the neurosurgical patient throughout their treatment and recovery process. Such data is crucial for an improved understanding of the disease processes while providing the surgeon additional clarity as they decipher the next best steps in decision-making and medical recommendations. In the current review article, the authors discuss the commonly used wearable and placeable monitoring devices and the biophysiological data that can be collected to monitor, as well as, assess the neurosurgical patient. Special focus is placed on invasive and non-invasive neurologic monitoring devices, but important and commonly used monitors for the rest of the body are also discussed as they relate to the neurosurgical patient. Last, the authors review new, as well as, upcoming devices and measurements to better analyze the neurosurgical patient's bodily function and physiologic status as needed. The synthesis of methods contained herein may provide meaningful guidance for neurosurgeons in effectively monitoring and treating their patients while also helping to guide their future efforts in patient biophysiologic monitoring developments within neurosurgery.

Analysis of treatment cost differences in patients undergoing femoral versus radial access in outpatient diagnostic cerebral arteriograms.

BACKGROUND: Outpatient diagnostic cerebral arteriograms are the most common procedure in neuroendovascular surgery, and the use of transradial access for these studies is growing. Although transradial access has been associated with lower hospital costs for elective diagnostic and interventional neuroendovascular procedures, no study has compared transfemoral access and transradial access costs for a homogenous population of patients undergoing outpatient diagnostic cerebral arteriogram. METHODS: In this single-center retrospective study, the Value Driven Outcomes database was used to evaluate treatment costs for patients who underwent outpatient diagnostic cerebral arteriogram from January 2019 to December 2022. Propensity-score matching was performed to reduce confounders. Costs from each encounter were subcategorized into imaging, supplies, pharmacy, procedures, labs, and facility costs. RESULTS: After matching, 337 patients each for transradial access and transfemoral access were available for analysis. A total of 118,992 cost data points were associated with all encounters. Overall, per-visit costs were 15.2% cheaper for patients who underwent transradial access versus transfemoral access (p < 0.001). Most of the cost difference was due to supplies (35.2% cost difference, p < 0.001) and procedure costs (9.3% cost difference, p < 0.001). No statistical differences were observed between the two approaches in imaging, pharmacy, labs, and facility costs (all p > 0.05). CONCLUSIONS: Costs for outpatient diagnostic cerebral arteriogram were lower in patients who underwent transradial access versus transfemoral access because of supply and procedure costs. Understanding reasons for cost differences in common procedures is important for creating strategies to reduce overall healthcare costs. Additionally, addressing the cost differences of newer techniques may increase the likelihood that they are more readily implemented by hospitals and providers.

Rehabilitation After Neurotrauma: A Commentary.

Rehabilitation following neurotrauma is an important component of recovery. The best outcomes involve multidisciplinary management. This involves medical therapies, functional therapies, and physical therapies. Speech therapy, physical therapy, and occupational therapy are crucial components. Emerging evidence has implicated the need for vision therapies and a focus on mental health. A seamless integration from inpatient to outpatient is validated. This can be at outpatient facilities or home care. The importance is a key point person for the patient.

Training student volunteers as community resource navigators to address patients' social needs: A curriculum toolkit.

Introduction: Few resources are available to train students to provide patients assistance for obtaining needed community-based services. This toolkit outlines a curriculum to train student volunteers to become "community resource navigators" to serve patients via telephone at partner health sites. Methods: University students co-designed the Help Desk navigator program and training for volunteer navigators as part of an academic-community partnership with a local Federally Qualified Health Center (FQHC). The multi-modal curricula consisted of five components: didactic instruction on social determinants of health and program logistics, mock patient calls and documentation, observation of experienced navigator interaction with patients, supervised calls with real patients, and homework assignments. In 2020, training materials were adapted for virtual delivery due to the COVID-19 pandemic. Trainees completed a survey after completion to provide qualitative feedback on the training and preparedness. Results: The training was offered for the first cohort of 11 student volunteer navigators in 2019, revised and then offered for 13 undergraduate and nursing students over 6 weeks in 2020. In the training evaluation, trainees described the new knowledge and skills gained from the training, the long-term benefits toward their educational and professional career goals, and helpful interactive delivery of the training. Trainees also highlighted areas for improvement, including more time learning about community resources and practicing challenging patient conversations. Conclusions: Our peer-to-peer, multi-modal training prepares student volunteers to become community resource navigators. Student, eager for meaningful clinical experiences, are an untapped resource that can help patients with their social needs.

Utilizing In Vivo Postnatal Electroporation to Study Cerebellar Granule Neuron Morphology and Synapse Development.

Neurons undergo dynamic changes in their structure and function during brain development to form appropriate connections with other cells. The rodent cerebellum is an ideal system to track the development and morphogenesis of a single cell type, the cerebellar granule neuron (CGN), across time. Here, in vivo electroporation of granule neuron progenitors in the developing mouse cerebellum was employed to sparsely label cells for subsequent morphological analyses. The efficacy of this technique is demonstrated in its ability to showcase key developmental stages of CGN maturation, with a specific focus on the formation of dendritic claws, which are specialized structures where these cells receive the majority of their synaptic inputs. In addition to providing snapshots of CGN synaptic structures throughout cerebellar development, this technique can be adapted to genetically manipulate granule neurons in a cell-autonomous manner to study the role of any gene of interest and its effect on CGN morphology, claw development, and synaptogenesis.

Factors Associated with Patients' Connection to Referred Social Needs Resources at a Federally Qualified Health Center.

INTRODUCTION: In an effort to improve health outcomes and promote health equity, healthcare systems have increasingly begun to screen patients for unmet social needs and refer them to relevant social services and community-based organizations. This study aimed to identify factors associated with the successful connection (ie, services started) to social needs resources, as well as factors associated with an attempt to connect as a secondary, intermediate outcome. METHODS: This retrospective cohort study included patients who had been screened, referred, and subsequently reached for follow-up navigation from March 2019 to December 2020, as part of a social needs intervention at a federally qualified health center (FQHC). Measures included demographic and social needs covariates collected during screening, as well as resource-related covariates that characterized the referred resources, including service domain (area of need addressed), service site (integration relative to the FQHC), and access modality (means of accessing services). RESULTS: Of the 501 patients in the analytic sample, 32.7% had started services with 1 or more of their referred resources within 4 weeks of the initial referral, and 63.3% had at least attempted to contact 1 referred resource, whether or not they were able to start services. Receiving a referral to resources that patients could access via phone call or drop-in visit, as opposed to resources that required additional appointments or applications prior to accessing services, was associated with increased odds (aOR 1.95, 95% CI 1.05, 3.61) of connection success, after adjusting for age, sex, race, ethnicity, education, number of social needs, and resource-related characteristics. This study did not find statistically significant associations between connection attempt and any variable included in adjusted analyses. CONCLUSION: These findings suggest that referral pathways may influence the success of patients' connection to social needs resources, highlighting opportunities for more accessible solutions to addressing patients' unmet social needs.