Chronic subdural haematoma in the elderly

Frailty as a predictor of poor outcomes in patients with chronic subdural hematoma (cSDH): A systematic review of literature

Objective

In recent years, frailty has been reported to be an important predictive factor associated with worse outcomes in neurosurgical patients. The purpose of the present systematic review was to analyze the impact of frailty on outcomes of chronic subdural hematoma (cSDH) patients.

Methods

We performed a systematic review of literature using the PubMed, Cochrane library, Wiley online library, and Web of Science databases following PRISMA guidelines of studies evaluating the effect of frailty on outcomes of cSDH published until January 31, 2023.

Results

A comprehensive literature search of databases yielded a total of 471 studies. Six studies with 4085 patients were included in our final qualitative systematic review. We found that frailty was associated with inferior outcomes (including mortality, complications, recurrence, and discharge disposition) in cSDH patients. Despite varying frailty scales/indices used across studies, negative outcomes occurred more frequently in patients that were frail than those who were not.

Conclusions

While the small number of available studies, and heterogenous methodology and reporting parameters precluded us from conducting a pooled analysis, the results of the present systematic review identify frailty as a robust predictor of worse outcomes in cSDH patients. Future studies with a larger sample size and consistent frailty scales/indices are warranted to strengthen the available evidence. The results of this work suggest a strong case for using frailty as a pre-operative risk stratification measure in cSDH patients.

Newer treatment paradigm improves outcomes in the most common neurosurgical disease of the elderly: a literature review of middle meningeal artery embolization for chronic subdural hematoma

Chronic subdural hematoma (cSDH) is one of the most prevalent neurosurgical diseases, especially in the elderly. Yet, its incidence is predicted to increase further, paralleling the growth of the geriatric population. While surgical evacuation is technically straightforward, it is associated with significant morbidity and mortality. In fact, 30% of patients are expected to have hematoma recurrence and to need repeat surgical evacuation, and 20% of patients are expected to lose independence and require long-term care. A pathophysiology more complex than originally presumed explains the disappointing results observed for decades. At its core, the formation of microcapillaries and anastomotic channels with the middle meningeal artery (MMA) perpetuates a constant cycle resulting in persistence of hematoma. The rationale behind MMA embolization is simple: to stop cSDH at its source. Over the last few years, this "newer" option has been heavily studied. It has shown tremendous potential in decreasing hematoma recurrence and improving neurological outcomes. Whether combined with surgical evacuation or performed as the only treatment, the scientific evidence to its benefits is unequivocal. Here, we aimed to review cSDH in the elderly and discuss its more recent treatment options with an emphasis on MMA embolization.

Single-Center Comparison of Chronic Subdural Hematoma Evacuation Outcomes Under Local Versus General Anesthesia

BACKGROUND

Chronic subdural hematoma (CSDH) is a neurosurgical pathology of an aged populace. Pathogenetic risk factors include traumatic brain injury, prolonged use of antiplatelet drugs, hypertension, and some inflammatory processes. The incidence increases as patients age. Burr-hole evacuation is the most common approach in management of symptomatic cases. We compared evacuation of chronic subdural hematomas with general or local anesthesia (GA and LA, respectively) and evaluated the safety, economic benefits, effects of comorbidity, benefits, and shortcomings of both techniques.

METHODS

We conducted a retrospective study of 67 consecutive patients who had 74 procedures for CSDH in a single neurosurgical center, the Regional Clinic, Centre of Neurosurgery and Neurology, over a 3-year period. They were grouped into the GA group (n = 44) and LA group (n = 23). Mean duration of procedure, length of hospital stay, complications, and preoperative and postoperative neurologic statuses were compared. The distribution of nominal variables between groups was compared using the Fisher exact test. The average duration of operation and length of hospital stay were compared using the Mann-Whitney U-test due to violation of the normality assumption.

RESULTS

LA proved to be as effective as GA in CSDH evacuation. Seventy-four surgical procedures were performed on 67 patients due to recurrence in less than 30 days in 7 patients. Fifteen patients had tension pneumocephalus managed with fluid therapy to full recovery. LA was economical and required shorter hospital stays and surgical time.

CONCLUSIONS

In our studies, LA proved to be noninferior to GA, time conserving, and less prone to some of the adverse effects of GA on elderly patients with comorbidity, although some patients who are hyperactive or contraindicated to LA will require GA.

Incidence of surgically treated chronic subdural hematoma after head injury with normal initial computed tomography

PURPOSE

The objective was to determine the incidence of surgically treated chronic subdural hematoma (cSDH) within six months after head trauma in a consecutive series of head injury patients with a normal initial computed tomography (CT).

METHODS

A total of 1941 adult patients with head injuries who underwent head CT within 48 h after injury and were treated at the Tampere University Hospital's emergency department were retrospectively evaluated from medical records (median age = 59 years, IQR = 39-79 years, males = 58%, patients using antithrombotic medication = 26%). Patients with no signs of acute traumatic intracranial pathology or any type of subdural collection on initial head CT were regarded as CT negative (n = 1573, 81%).

RESULTS

Two (n = 2) of the 1573 CT negative patients received surgical treatment for cSDH. Consequently, the incidence of surgically treated cSDH after a normal initial head CT during a six-month follow-up was 0.13%. Both patients sustained mild traumatic brain injuries initially. One of the two patients was on antithrombotic medication (warfarin) at the time of trauma, hence incidence of surgically treated cSDH among patients with antithrombotic medication in CT negative patients (n = 376, 23.9%) was 0.27%. Additionally, within CT negative patients, one subdural hygroma was operated shortly after trauma.

CONCLUSION

The extremely low incidence of surgically treated cSDH after a normal initial head CT, even in patients on antithrombotic medication, supports the notion that routine follow-up imaging after an initial normal head CT is not indicated to exclude the development of cSDH. Additionally, our findings support the concept of cSDH not being a purely head trauma-related disease.

Endovascular treatment of subdural haematoma in patient under anti-platelet therapy: a case report

Introduction

The incidence of chronic subdural haematoma (cSDH) is relatively high among the elderly population. Other known risk factors for cSDH include male sex, dependency on anti-platelet or anticoagulant medication, and chronic alcoholism. Although, the standard mode of treatment for cSDH is surgery, embolization of the middle meningeal artery (MMA), either upfront or as an adjunct to surgical evacuation can be used for the treatment of cSDH.

Case presentation

The authors present a case of a 75-year-old female with prior history of posterior-lateral wall myocardial infarction (MI) eight years back presented to our centre with the chief complaints of a gradual onset of cough and headache for 2 months. The patient had no history of trauma, loss of consciousness, seizures, and vomiting. There was no history of diabetes, hypertension, pulmonary tuberculosis, and other chronic illness.

Discussion

The concurrent use of anti- platelet drug during a surgical procedure can make the treatment challenging. Endovascular treatment can be a primary treatment modality in such situation.

Conclusion

Elimination of blood supply by middle meningeal artery embolization is emerging as a safe, minimally invasive alternative to treat cSDH.

Retrospective Analysis of Risk Factors for Recurrence of Chronic Subdural Haematoma after Surgery

(1) Background: In this study, epidemiological, clinical, therapeutical, and haemostaseological variables were investigated regarding their correlation with the recurrence of chronic subdural haematomas to assess the risk of recurrence more reliably in everyday clinical practice. (2) Methods: In our retrospective study, the electronic records of 90 patients who underwent surgery for a chronic subdural haematoma at our institute between 1 January 2017 and 31 May 2021 were analysed regarding previously defined variables. (3) Results: In the patient collective, 33.33% of the 90 patients experienced a recurrence requiring treatment. The occurrence of a recurrence was not statistically significantly related to age, gender, known alcohol abuse, a specific location, extension over one or both hemispheres, the surgical method, or anticoagulant medication. However, the recurrence was statistically significantly related to haematoma width (p = 0.000007), septation (p = 0.005), and the existence of a coagulation disorder not treated with medication (p = 0.04). (4) Conclusions: In our study, the width of the haematoma, septation, and coagulation disorders not treated with medication were documented as risk factors for the occurrence of a chronic subdural haematoma. Identifying of these risk factors could help in adapting individual therapeutic concepts for chronic subdural haematomas.

New horizons in subdural haematoma

Subdural haematoma (SDH) is a common injury sustained by older people living with frailty and multimorbidity, and typically following falls from a standing height. Anticoagulant and antiplatelet use are commonly indicated in older people with SDH, but few data inform decision-making surrounding these agents in the context of intracranial bleeding. Opposing risks of rebleeding and thrombosis must therefore be weighed judiciously. Decision-making can be complex and requires detailed awareness of the epidemiology to ensure the safest course of action is selected for each patient. Outcomes of surgical decompression in acute SDH are very poor in older people. However, burr hole drainage can be safe and effective in older adults with symptomatic chronic SDH (cSDH). Such patients need careful assessment to ensure symptoms arise from cSDH and not from coexisting medical pathology. Furthermore, the emerging treatment of middle meningeal artery embolisation offers a well-tolerated, minimally invasive intervention which may reduce the risks of rebleeding in older adults. Nonetheless, UK SDH management is heterogenous, and no accepted UK or European guidelines exist at present. Further randomised trial evidence is required to move away from clinical practice based on historic observational data.

Computed Tomography Imaging of Geriatric Patients with Uncertain Head Trauma

BACKGROUND

Although clinical decision rules exist for patients with head injuries, no tool assesses patients with unknown trauma events. Patients with uncertain trauma may have unnecessary brain imaging.

OBJECTIVE

This study evaluated risk factors and outcomes of geriatric patients with uncertain head injury.

METHODS

This prospective cohort study included geriatric patients with definite or uncertain head injury presenting to two emergency departments (EDs). Patients were grouped as definite or uncertain head trauma based on history and physical examination. Outcomes were intracranial hemorrhage (ICH) on head computed tomography (CT), need for neurosurgical intervention, and mortality. Risk factors assessed included gender, alcohol use, tobacco use, history of dementia, anticoagulant use, antiplatelet use, and Glasgow Coma Scale (GCS) score < 15.

RESULTS

We enrolled 2905 patients with definite head trauma and 950 with uncertain head trauma. Rates of acute ICH (10.7% vs. 1.5%; odds ratio [OR] 8.02; 95% confidence interval [CI] 4.67-13.76), delayed ICH (0.7% vs. 0.1%; OR 6.58; 95% CI 4.67-13.76), and neurosurgical intervention (1.2% vs. 0.3%; OR 3.74; 95% CI 1.15-12.20) were all higher in definite vs. uncertain head injuries. There were no differences in mortality. Patients with definite trauma had higher rates of ICH with male gender (OR 1.58; 95% CI 1.24-1.99), alcohol use (OR 1.62; 95% CI 1.25-2.09), antiplatelet use (OR 1.84; 95% CI 1.46-2.31), and GCS score < 15 (OR 3.24; 95% CI 2.54-4.13). Patients with uncertain trauma had no characteristics associated with increased ICH.

CONCLUSIONS

Although ICH rates among patients with uncertain head trauma was eight times lower than those with definite head trauma, the risk of ICH is high enough to warrant CT imaging of all geriatric patients with uncertain head injury.

Factors for predicting recurrence after burr hole drainage for chronic subdural hematoma: a retrospective study

Chronic subdural hematoma (SDH) is a common disease in the neurosurgical field, and hematoma drainage through burr hole trephination has been widely considered the optimal treatment for SDH. Despite numerous investigations aimed at predicting recurrence rates and associated factors, studies have demonstrated inconsistent results. In this study, we aimed to comprehensively determine the predictive factors of chronic SDH recurrence in surgically treated patients. We retrospectively evaluated 578 consecutive patients who underwent single burr hole surgery for chronic SDH at our institute between January 2008 and December 2021. Various clinical and radiological factors in patients with and without recurrence were compared using univariate and multivariate logistic regression analyses. A total of 438 patients (531 hemispheres) were analyzed. Fifty-four (10.17%) of the 531 hemispheres had recurrence of chronic SDH within 6 months. Male sex (adjusted odds ratio (aOR) = 3.48; 95% confidence interval (CI), 1.42-8.49), bilateral hematomas (aOR = 2.14; 95% CI, 1.05-4.35), laminar hematoma type (aOR = 2.87; 95% CI, 1.23-6.71), > 30-cm3 volume of postoperative residual hematoma (aOR = 2.99; 95% CI, 1.01-8.83), and preoperative blood glucose level of ≥ 150 mg/dL (aOR = 2.11; 95% CI, 1.10-4.05) were identified as independent factors associated with recurrence in multivariate logistic regression analysis. The present study revealed that male patients and those who had bilateral hematomas, laminar hematoma type, a large volume of hematoma after surgery, and a high preoperative blood glucose level had a higher probability of experiencing recurrent chronic SDH. We recommend close monitoring of patients 6 months postoperatively to detect subsequent chronic SDH recurrence.

Cardiovascular events and venous thromboembolism after primary malignant or non-malignant brain tumour diagnosis: a population matched cohort study in Wales (United Kingdom)

BACKGROUND

Elevated standardised mortality ratio of cardiovascular diseases (CVD) in patients with brain tumours may result from differences in the CVD incidences and cardiovascular risk factors. We compared the risk of CVD among patients with a primary malignant or non-malignant brain tumour to a matched general population cohort, accounting for other co-morbidities.

METHODS

Using data from the Secured Anonymised Information Linkage (SAIL) Databank in Wales (United Kingdom), we identified all adults aged ≥ 18 years in the primary care database with first diagnosis of malignant or non-malignant brain tumour identified in the cancer registry in 2000-2014 and a matched cohort (case-to-control ratio 1:5) by age, sex and primary care provider from the general population without any cancer diagnosis. Outcomes included fatal and non-fatal major vascular events (stroke, ischaemic heart disease, aortic and peripheral vascular diseases) and venous thromboembolism (VTE). We used multivariable Cox models adjusted for clinical risk factors to compare risks, stratified by tumour behaviour (malignant or non-malignant) and follow-up period.

RESULTS

There were 2869 and 3931 people diagnosed with malignant or non-malignant brain tumours, respectively, between 2000 and 2014 in Wales. They were matched to 33,785 controls. Within the first year of tumour diagnosis, malignant tumour was associated with a higher risk of VTE (hazard ratio [HR] 21.58, 95% confidence interval 16.12-28.88) and stroke (HR 3.32, 2.44-4.53). After the first year, the risks of VTE (HR 2.20, 1.52-3.18) and stroke (HR 1.45, 1.00-2.10) remained higher than controls. Patients with non-malignant tumours had higher risks of VTE (HR 3.72, 2.73-5.06), stroke (HR 4.06, 3.35-4.93) and aortic and peripheral arterial disease (HR 2.09, 1.26-3.48) within the first year of diagnosis compared with their controls.

CONCLUSIONS

The elevated CVD and VTE risks suggested risk reduction may be a strategy to improve life quality and survival in people with a brain tumour.

A chronic subdural hematoma complicating an arachnoid cyst in a juvenile boxer: a rare case report with comprehensive literature review

Introduction and importance

Arachnoid cyst (AC) is the most frequently founded lesion reported in adolescent patients suffering from chronic subdural haematoma (CSDH). Association between these two distinct clinical entities is known for a long time. However, in the literature there are numerous clinical cases that reflect this relationship and few large series that analyze them in detail. Paediatric population is more rarely affected with this association.

Case presentation

The authors report the case of AC of incidental discovery complicated with CSDH in 15-year-old male recreational boxer presented with progressive onset of holocranial drug-resistant throbbing headache with favourable clinical course after conservative treatment.

Clinical discussion

ACs are a well-known predisposing cause for CSDH after head trauma. In all cases of CSDH in children, the diagnosis of ruptured AC should be considered. Rupture may be spontaneous or following even mild head trauma with rupture of bridging veins causing subdural bleeding as it was seen in our patient who was practicing a full-contact free-sparring sport like boxing sustaining repeated and direct mild head traumas. MRI is recommended to detect small cysts in adolescents with CSDH. The management of these patients remains controversial.

Conclusion

This is a rare reported case of CSDH complicating an AC in a juvenile recreational male boxer. This association remains extremely rare in children and adolescents, as evidenced by the rare cases reported in the literature.

Middle meningeal artery embolization for refractory chronic subdural hematoma in a pediatric victim of nonaccidental trauma: illustrative case

BACKGROUND

Chronic subdural hematoma (cSDH) in children is associated with several etiologies, one of which is nonaccidental trauma (NAT). Performed alone or as an adjunct to surgical intervention, middle meningeal artery (MMA) embolization may be effective in resolving and preventing the recurrence of cSDH in adult patients. However, MMA embolization for pediatric cSDH has not been adequately evaluated, and there exists no consensus on the appropriate selection of pediatric patients for this minimally invasive procedure. Appreciating the variable underlying pathophysiology of pediatric cSDH will enable the development of guidelines for patient selection.

OBSERVATIONS

A 14-month-old female patient presented with depressed consciousness, seizure-like activity, and apneic episodes. She was diagnosed with bilateral subacute on chronic SDH associated with NAT, and imaging revealed diffuse brain atrophy. Despite undergoing burr hole drainage, she developed refractory cSDH and was treated with bilateral MMA embolization. At her 10-month follow-up, magnetic resonance imaging revealed a decrease in the size of the subdural collections, and she was tolerating feeds, at her neurological baseline, and seizure-free.

LESSONS

Infants and young children with symptomatic cSDH secondary to NAT, whose tissue dynamics are reminiscent of cSDH in elderly patients with diffuse brain atrophy, may derive the most benefit from MMA embolization.

Renin-angiotensin-aldosterone system inhibitors as a risk factor for chronic subdural hematoma recurrence: A matter of debate

OBJECTIVES

Chronic subdural hematoma (cSDH) is a common central nervous system condition. Recent reports indicate that cSDH affects long-term prognosis; however, its definitive risk factors remain unknown. An antihypertensive drug, renin-angiotensin-aldosterone system inhibitors (RAASi), can affect vascular permeability and cell proliferation processes, which may suppress the recurrence of cSDH. However, several studies have reported negative results to this effect. Therefore, we aimed to evaluate antihypertensive drugs, including RAASi, as risk factors for recurrent cSDH.

MATERIALS AND METHODS

A total of 203 consecutive cases of surgically treated cSDH were retrospectively reviewed. Clinical and radiological parameters were compared between the groups with and without cSDH recurrence to identify risk factors.

RESULTS

Of the included cases, 68 (33.5%) used RAASi and 37 (18.2%) developed recurrence within 60 days of surgery. In the multiple logistic regression analysis adjusted by composite risk score, the odds ratios (95% confidence interval) of RAASi, calcium channel blockers, diuretics, β and α blockers, for the recurrent risk of cSDH after surgery were 2.49 (1.16, 5.42), 1.79 (0.84, 3.82), 1.83 (0.62, 4.87), 0.90 (0.28, 2.44), and 0.96 (0.21, 3.20), respectively. The Cox proportional hazard model also demonstrated that RAASi-use was an independent risk factor for cSDH recurrence.

CONCLUSIONS

Present series suggests RAASi-use as a risk factor for cSDH recurrence, although the role of RAASi-use in cSDH remains debatable. Further studies for deeper understanding of the microenvironment of hematoma and the surroundings are preferable. (235 words).

[Traumatic brain injury]

Traumatic brain injury (TBI) describes parenchymal brain damage caused by external forces to the head. It has a massive personal and socioeconomic impact, as it is a disease with high morbidity and mortality. Both young and old people are affected, as a result of traffic or sports accidents as well as due to falls at home. The term TBI encompasses various clinical pictures, differing considerably in cause, prognosis and therapy. What they all have in common is the pathophysiological cascade that develops immediately after the initial trauma and which can persist for several days and weeks. In this phase, medical treatment, whether surgical or pharmacological, attempts to reduce the consequences of the primary damage. The aim is to maintain adequate cerebral perfusion pressure and to reduce intracranial pressure.

Chronic Subdural Hematoma: Predicting Postoperative Recurrence Using a Correlation of Computerized Tomographic Volume with Intraoperative Volume

Background

Chronic subdural hematoma (CSDH) recurrence is the most common complication following surgery.

Objective

To predict postoperative recurrence of CSDH using a correlation of the calculated preoperative brain computerized tomographic (CT) volume with the intraoperative volume.

Materials and Methods

A prospective study was conducted over 14 months in a tertiary hospital in southwestern Nigeria. History with focused examination findings and patient grading using Markwalder classification were documented preoperatively. Preoperative CSDH CT volume was documented and compared with the intraoperative volume. Patients were followed up clinically for features of recurrence at 1, 3, and 6 months postoperatively, and repeat brain CT was done when recurrence was suspected clinically.

Results

Forty-seven out of 51 patients recruited completed the study, and four were lost to follow-up. Thirty-three (70.2%) were males, and the average age was 51.4 years. Most of the patients were in the 5th and 7th decades of life. Three patients had recurrence (6.5%), and one patient died (2.1%). Trauma was the most common cause of CSDH (35 out of 47 [74.5%]), spontaneous in 11 (23.4%), and anticoagulant related in 1 (2.1%) patient. Most patients (37/47; 78.7%) presented with headache. The mean brain CT volume and intraoperative volume of CSDH were 102.58 ± 54.13 and 87.74 ± 46.6 mL, respectively, with no significant difference between them (P = 0.104). The receiver operating characteristics curve of intraoperative volume predicted the recurrence of CSDH at a volume >130 mL, with a sensitivity of 66.7%.

Conclusion

The calculated preoperative CT volume had a positive linear correlation with intraoperative volume. Intraoperative CSDH volume >130 mL was associated with an increased risk of recurrence.

Nontraumatic subdural hematoma in patients on hemodialysis with end-stage kidney disease: a systematic review and pooled analysis

Background

The original treatment may aggravate when hemodialysis (HD) patients have nontraumatic subdural hematoma (NSDH). End-stage kidney disease patients are at increased risk for NSDH, but its risk factors and outcomes are not sufficiently explored at present.

Methods

Electronic databases, including PubMed, EMBASE, and Web of Science were searched by using various combinations of the keywords "Hemodialysis," "Renal Insufficiency," "Extracorporeal Dialysis," "Subdural Hematoma," "Subdural Hemorrhage," "Subdural Hematomas," and "Subdural Hemorrhages" in accordance with the PRISMA guidelines. Sixteen papers were selected. Relevant patient data were extracted, aggregated, and analyzed.

Results

A total of 74 patients were analyzed, including 37 male, 26 female, and 11 with no gender data, with a mean age of 56 years (range, 16-81 years). There were 43 patients with hypertension, 36 patients with diabetes, 16 patients who used oral anticoagulants before dialysis, and 10 patients with atrial fibrillation. The diagnosis of subdural hematoma (SDH) was made by computed tomography (CT) (n = 51), carotid arteriography (n = 7), surgical exploration (n = 3), and autopsy (n = 2). Forty cases underwent surgical treatment, including craniotomy and burr hole (or twist drill) drainage. The 1 year mortality rate of NSDH was 45.9%. The mortality rate after conservative treatment (61.8%) was higher than that after surgical intervention (32.5%). The mortality rate of NSDH in dialysis patients with atrial fibrillation and in those who used oral anticoagulants before hemodialysis (HD) was 90 and 81%, respectively.

Conclusion

NSDH is rare in HD, and mortality is high if NSDH occurs in dialysis patients. Surgical intervention reduces the mortality from NSDH in patients on HD (p < 0.02). Patients with atrial fibrillation and those who were taking oral anticoagulants before dialysis have a higher NSDH mortality (p < 0.01).

Use of Novel Automated Active Irrigation With Drainage Versus Passive Drainage Alone for Chronic Subdural Hematoma-A Propensity Score-Matched Comparative Study With Volumetric Analysis

BACKGROUND

Passive drainage post-surgical evacuation of symptomatic chronic subdural hematoma (cSDH) is currently standard of care. High rates of infection, drain occlusion, and recurrence are associated complications.

OBJECTIVE

To explore the use of a novel double-lumen active automated irrigation and aspiration system, IRRAflow (IRRAS), for patients with cSDH and compared procedural and clinical outcomes against passive drainage alone with propensity score matching (PSM) and volumetric analysis.

METHODS

A prospectively maintained database was retrospectively searched for consecutive patients presenting with cSDH. One-to-one PSM of covariates (including baseline comorbidities and presentation hematoma volume) in active and passive irrigation groups was performed to adjust for treatment selection bias. Rates of hematoma clearance, catheter-related occlusion, and infection; number of revisions; and length of hospital stay were recorded.

RESULTS

This study included 55 patients: active continuous irrigation-drainage-21 (21 post-PSM) and passive drainage-34 (21 post-PSM). For PSM groups, a significantly higher rate of hematoma clearance was obtained in the active irrigation-drainage group (0.5 ± 0.4 vs 0.4 ± 0.5 mL/day) and in the passive drainage group; odds ratio (OR) = 1.291 (CI: 1.062-1.570, P = .002) and a significantly lower rate of catheter-related infections (OR = 0.051; CI: 0.004-0.697, P = .039). A nonsignificantly lower hematoma expansion rate at discharge was noted in the active irrigation-drainage group (4.8% vs 23.8%; OR = 0.127; P = .186). No statistical difference in all-cause in-hospital mortality or discharge Glasgow Coma Scale score was observed between groups.

CONCLUSION

Active and automated continuous irrigation plus drainage after cSDH surgical evacuation resulted in faster hematoma clearance and led to favorable clinical outcomes and low complication and revision rates compared with passive irrigation.

Accidental Injury or "Shaken Elderly Syndrome"? Insights from a Case Report

Subdural haemorrhage (SDH) as result of a traumatic brain injury (TBI) is a common cause of death in cases of fatal physical abuse. Since intracranial bleeding is a common finding in elderly due to age-related intracranial changes or increasing prevalence of anticoagulant medication, differential diagnosis between inflicted and non-inflicted head injury is challenging. A case of an elderly woman's death caused by TBI is reported. Autopsy showed multiple polychromatic bruises and a frontoparietal hematoma with bilateral subacute SDH. History excluded paraphysiological or pathological non-traumatic conditions that could justify SDH, while iatrogenic factors only played a contributory role. Since polychromatic bruises distributed on the face, the upper extremities and the chest were consistent with forceful grasping/gripping or repeated blows and SDH can form in absence of impact or by mild/minor blows, SDH was considered the result of repeated physical abuses. Differential diagnosis between traumatic and non-traumatic SDH is still challenging for forensic pathologists. As largely accepted in the pediatric population and occasionally described also in adults, however, violent shaking should be also considered as a possible mechanism of SDH-especially in elderly who do not have any sign of impact to the head.

Effect of long-term anticoagulant therapy on the outcome of chronic subdural hematoma: a propensity score-matched analysis

OBJECTIVE

Chronic subdural hematomas (cSDHs) are particularly common in older adults who have increased risk of falls and the conditions that require anticoagulants (ACs). In such cases, clinicians are often left with the dilemma of co-managing the cSDH and the ongoing need for ACs.

METHODS

Patients who underwent surgical management for cSDH at the authors' institution between January 2006 and June 2022 were identified. Propensity score-matched analysis was used to obtain a balance in patients who were on ACs before the procedure versus those who were not, and in patients who were on ACs postprocedure versus those who were not. Length of hospitalization, periprocedural complications, reintervention rate during the same admission, rebleeding risk, and reintervention rates after discharge were compared.

RESULTS

In total, 104 patients were on long-term ACs before the procedure, whereas 372 were not. After matching, 55 pairs were included in the analysis. Postprocedure, 74 patients were started on long-term ACs; the rest were not. A total of 49 patients in each group were then included in the analysis after matching. Comparing the preprocedure AC group with the non-AC group, no significant differences were found in length of hospitalization (8.5 ± 6.7 days vs 8.1 ± 7.7 days, p = 0.75), periprocedural complications (7.3% vs 7.3%, p > 0.99), or reintervention during the same admission (1.8% vs 5.5%, p = 0.31). In the comparison of postprocedure AC and non-AC groups, no significant differences were seen in recurrence rate (8.2% vs 14.3%, p = 0.52), reintervention rate after discharge (4.1% vs 14.3%, p = 0.16), or disability (i.e., mRS ≤ 2; 83.7% vs 89.8%, p = 0.55).

CONCLUSIONS

Being treated with long-term ACs before cSDH procedures does not affect length of hospitalization, periprocedural complications, or reintervention during the same admission. Similarly, administration of long-term ACs after a procedure for cSDH does not increase rebleeding risk or reintervention rate. Patients who are on long-term ACs can have similar interventions to those who are not on ACs. In addition, it is safe to restart patients on AC agents in a 7- to 14-day window after admission for cSDH with or without acute/subacute components.

Middle meningeal artery embolization for treatment of chronic subdural hematoma

BACKGROUND

Chronic subdural hematoma (cSDH) is caused by rupture of bridging intracranial veins located in the subdural space. Predominantly, cSDH is a disease of older adults and other predisposing risk factors include minor head trauma, cerebral atrophy, antiplatelet and anticoagulation therapies, arterial hypertension, cerebrovascular atherosclerosis, diabetes mellitus, cerebrospinal fluid loss, and excessive alcohol consumption. The incidence of cSDH is rising worldwide due to an aging population and the increased use of anticoagulant or antiplatelet medications. Clinical manifestations are varied, with altered mental status and focal neurologic deficits among the most common.

METHODOLOGICAL INNOVATIONS

Treatment strategies depend on the symptomatology and extent of hematoma. In general, conservative treatment is sought for patients who are asymptomatic or have only mild symptoms, whereas symptomatic patients are often treated surgically. However, the recurrence rate of cSDH may be as high as 30%. In recent years, middle meningeal artery embolization has emerged as a complementary option to surgery aimed at decreasing the recurrence rate after excision as well as an alternative therapeutic approach to surgical therapy in certain circumstances.

CONCLUSION

Embolization of the middle meningeal artery appears to be a promising treatment for patients with cSDH, both before and after surgical excision.

Concurrent Spinal and Intracranial Subdural Hematomas as a Cause of Near-Fatal Low Back Pain in the Chiropractic Office: A Case Report

In older individuals, minor trauma may cause potentially fatal intracranial subdural hematoma (SDH). Rarely, these patients present with only low back and radicular pain as gravity redistributes the SDH to the lumbar spine. A 69-year-old male presented to a chiropractor with a 10-day history of acute on chronic low back pain, which radiated into his lower extremities bilaterally, involving weakness and difficulty walking, and a ground-level fall onto his elbows 16 days prior. He had visited his primary care provider, orthopedist, and traditional Chinese medicine practitioner, received oral analgesics and three ketorolac injections, and had lumbar radiographs, followed by acupuncture, cupping, and spinal manipulation without lasting relief. Considering the patient's concerning presentation, the chiropractor ordered lumbar magnetic resonance imaging (MRI) on the first visit, revealing findings suggestive of late subacute lumbar SDH, and recommended urgent brain MRI and neurosurgical referral. The patient went to an orthopedic surgeon at a nearby hospital, becoming disoriented upon presentation, prompting admission. Brain MRI confirmed bilateral chronic intracranial SDH, prompting emergency hematoma evacuation via burr hole craniostomy. The patient's gait rapidly improved, and the pain subsided over the following two weeks. This case highlights an older male identified as having spinal SDH by a chiropractor, leading to referral and surgery for concurrent life-threatening intracranial SDH. Clinicians should be aware that spinal SDH may stem from asymptomatic intracranial SDH and should be suspicious of SDH in older individuals after a fall, signs of which warrant emergency referral for MRI and surgical evaluation.

Half-Saline Versus Normal-Saline as Irrigation Solutions in Burr Hole Craniostomy to Treat Chronic Subdural Hematomata: A Randomized Clinical Trial

OBJECTIVE

This study aimed to evaluate the efficacy and safety of half-saline (HS) serum as an irrigation solution in chronic subdural hematoma (CSDH) surgery using the burr hole craniostomy (BHC) technique.

METHODS

This randomized clinical trial was conducted in university hospital referral centers from 2020 to 2021. Sixty-three patients with CSDH eligible for BHC were primarily enrolled. Two patients were excluded because of concurrent stroke. Sixty-one patients were randomly allocated into case (HS=30) and control (normal-saline [NS]=31) groups. HS was used to irrigate the hematoma in the case group and NS was used in the control group. The patients were followed-up. Clinical variables including demographic and medical findings, postoperative computed tomography findings, postoperative complications, hospitalization period, recurrence rate, and functional status measured by the Barthel type B index were recorded.

RESULTS

Forty-six of 61 patients were male (75.4%), and the patients' mean age was 65.4±16.9 years, with equal distribution between the 2 groups. Postoperative effusion and postoperative hospital stay duration were significantly lower in the HS group than in the NS group (p=0.002 and 0.033, respectively). The postoperative recurrence within 3 months in both groups was approximately equal (6.6%). In terms of functional outcomes and postoperative complications, HS showed similar results to those of NS.

CONCLUSION

HS as an irrigation fluid in BHC effectively reduced postoperative effusion and hospital stay duration without considerable complications.

TRIAL REGISTRATION

Iranian Registry of Clinical Trials Identifier: IRCT20200608047688N1.

A Validation Study of Kwon's Prognostic Scoring System for Chronic Subdural Hematoma

OBJECTIVE

Surgery for chronic subdural hematoma is one of the most frequent operations in neurosurgical practice. Chronic subdural hematoma mostly afflicts the elderly population. In 2018, Kwon and co-workers, published the Kwon scoring system (KSS), whereby 6 clinical and radiological factors are used to facilitate, and promote quality in, surgical decision-making and counseling of relatives. The aim of this study is to validate the KSS.

METHODS

Patients operated on for unilateral chronic subdural hematoma at Örebro University Hospital, Sweden, between 2013 and 2019 constituted the study population. General data and the 6 outcome predictors according to the KSS were extracted from the electronic patient records. The preoperative modified Rankin Scale score and the postoperative 6-month modified Rankin Scale score were assessed.

RESULTS

We identified 133 patients (69.2% male) with a median age of 80.2 years (interquartile range 72.6-85.9). The median Glasgow Coma Scale score at admission was 15; 57.1% had motor deficits and 36.81% were disoriented. For 39.1% of the patients, the prognosis was a favorable outcome (modified Rankin Scale 0-1) at 6 months. The median KSS score was 9; 63.9% of the patients scored ≥9, and 36 (42.4%) of these patients actually achieved a favorable outcome. This corresponds to a prediction model sensitivity of 0.667 and specificity of 0.424. A receiver operator characteristic curve analysis of the model yielded an area under the receiver operator characteristic curve of 0.62441.

CONCLUSIONS

In our material, the KSS did not predict outcome precisely enough to base treatment decisions or counseling of relatives on the scores obtained.

Middle Meningeal Artery Embolization Minimizes Burdensome Recurrence Rates After Newly Diagnosed Chronic Subdural Hematoma Evacuation (MEMBRANE): study protocol for a randomized controlled trial

Background

Chronic subdural hematoma (cSDH) is the most common complication of mild traumatic brain injury demanding neurosurgery in high-income countries. If undetected and untreated, cSDH may increase intracranial pressure and cause neurological deficiencies. The first-line intervention of choice is burr hole trepanation and hematoma evacuation. However, any third patient may experience rebleeding, demanding craniotomy with excess morbidity. Adjunct endovascular embolization of the frontal and parietal branches of the middle meningeal artery (MMA) is a promising approach to avoid relapse and revision but was hitherto not studied in a randomized trial.

Methods

MEMBRANE is an investigator-initiated, single-center, randomized controlled trial. Male, female, and diverse patients older than 18 years scheduled for surgical evacuation of a first cSDH will be assigned in a 1:1 fashion by block randomization to the intervention (surgery plus endovascular MMA embolization) or the control group (surgery alone). The primary trial endpoint is cSDH recurrence within 3 months of follow-up after surgery. Secondary endpoints comprise neurological deficits assessed by the modified Rankin Scale (mRS) and recurrence- or intervention-associated complications during 3 months of follow-up. Assuming a risk difference of 20% of rebleeding and surgical revision, a power of 80%, and a drop-out rate of 10%, 154 patients will be enrolled onto this trial, employing an adaptive O’Brien-Fleming approach with a planned interim analysis halfway.

Discussion

The MEMBRANE trial will provide first clinical experimental evidence on the effectiveness of endovascular embolization of the MMA as an adjunct to surgery to reduce the risk of recurrence after the evacuation of cSDH.

Trial registration

German Clinical Trials Registry (Deutsches Register Klinischer Studien [DRKS]) DRKS00020465. Registered on 18 Nov 2021. ClinicalTrials.gov NCT05327933. Registered on 13 Apr 2022.

Hematoma cavity separation and neomembrane thickness are potential triggers of recurrence of chronic subdural hematoma

Background

Chronic subdural hematoma (CSDH) is the anomalous and encapsulated accumulation of fluid of complex origin consisting of old blood, mostly or totally liquified and cerebrospinal fluid (CSF) in the subdural space usually after a head injury in the elderly. Almost all the research on surgical techniques and endoscopic assisted evacuation of CSDH focused on the just the evacuation and not abnormal anatomical structures that causes recurrences.

Objectives

We investigated abnormal anatomical structures that triggers recurrence of CSDH during craniotomy as well as burr-hole craniostomy with endoscopic assistance.

Materials and methods

We retrospectively analyzed all patients with CSDH who underwent craniostomy and burr-hole craniotomy with endoscopic assisted evacuation of hematoma between April 2017 and November 2020 at our institution. Clinical data obtained was categorized into patient-related, radiology as well as surgery and endoscopic evaluations.

Results

A total of 143 patients (109 men and 34 women) aged 43–94 years (mean age, 68.35 years) with CSDH were included in this study. We observed a recurrence rate of 4.9% (7/143). Recurrences occurred between 2 and 6 months after the operation in patients with recurrences. Our data revealed that, age, hypertension, history of injury, diabetes, antiplatelet or anticoagulant use were not associated with hematoma recurrence. Nevertheless, all the patients with recurrence of hematoma were males. Interestingly, our univariate and multivariate analyses found neomembrane thickness and hematoma cavity separation as independent risk factors (OR,45.822; 95% CI,2.666-787.711; p = 0.008) for the recurrence of CSDH (p < 0.05). Also, we observed thickened membranes connecting/separating the dura and the thickened arachnoid/pia matters in all the 7 patients with hematoma recurrence.

Conclusions

The treatment of patients with CSDH ought to include the identification and resection of abnormal thickened membranes connecting/separating the dura and the thickened arachnoid/pia matters to avoid recurrence. Comparatively, endoscopy showed hematoma cavity separation or neomembrane thickness just as seen during craniotomy.

Pathophysiology of transient neurological deficit in patients with chronic subdural hematoma: A systematic review

Patients with chronic subdural hematoma (CSDH) can have transient neurological deficits deficit (TND) mimicking transient ischemic attacks. The prevalence of TNDs in CSDH varies between 1%-24%, depending on TND definition. Despite this high prevalence the pathophysiology of TND in CSDH is not clear in many cases. In this systematic review, we aim to unravel the responsible mechanism. Pubmed and Embase were searched for all articles concerning the pathophysiology of TND as a presenting symptom in patients with CSDH. There were no publication date restrictions for the articles in the search. Two reviewers independently selected studies for inclusion and subsequently extracted the necessary data. Out of 316 identified references, 15 met the inclusion criteria. Several articles mentioned multiple pathophysiological mechanisms. One of the proposed etiologies of TND was epileptic activity, stated by three articles. In contrast, three different studies stated that seizures are unlikely to cause TND. Five papers suggested that obstruction of blood flow, caused by the hematoma or subsequent swelling, might be the cause. Six articles made no definite statement on the responsible pathophysiological mechanism of TND. Different mechanisms have been proposed to be the cause of TNDs in patients with CSDH. Based on this review, the exact pathophysiology of TND remains unclear. We suggest that future studies on this topic should incorporate MRI of the brain (with diffusion-weighted imaging) and EEG, to provide better insight into TND pathophysiology. The knowledge resulting from future studies might contribute to better understanding of TND and optimal treatment in CSDH.

Tranexamic acid to prevent operation in chronic subdural haematoma (TORCH): study protocol for a randomised placebo-controlled clinical trial

Background

Chronic subdural haematoma (cSDH) occurs mainly in the elderly. Surgical evacuation is effective, but in these old, often frail, patients with multi-comorbidity, surgery carries significant risks for future cognitive functioning and loss of independency. Therefore, a growing interest is noted for a non-surgical treatment with medication such as tranexamic acid (TXA). In five small retrospective series, this antifibrinolytic drug showed a beneficial effect on the spontaneous resolution of the haematoma, and with that, the necessity for surgery.

Methods

For this randomised, placebo-controlled clinical multicentre trial, all cSDH patients, over 50 years old with mild symptoms (Glasgow Coma Score (GCS) ≥ 14, modified National Institutes of Health Stroke Scale (mNIHSS) ≤ 4), a midline shift of ≤ 10 mm and in whom a primary conservative treatment is chosen, are eligible for study participation. After informed consent, 140 patients will be randomised to receive either TXA 500 mg or placebo two times daily for 28 days. The primary outcome is the necessity for surgery within 12 weeks; secondary outcomes are cSDH volume, neurological impairment (mNIHSS), falling incidents, cognitive functioning (Montreal Cognitive Assessment (MOCA)), performance in activities of daily living (Barthel and Lawton score), functional outcome (modified Rankin Scale (mRS)), quality of life (Short Form Health Survey (SF-36) and EuroQol 5-Dimension Health Survey (EQ-5D)), mortality and the use of care and health-related costs (Medical Consumption Questionnaire (iMCQ) and Productivity Cost Questionnaire (iPCQ)) at 12 weeks and 6 months.

Discussion

This phase III trial investigating the efficacy of TXA to prevent surgery for cSDH is the first in including patients using anticoagulants and mentally incompetent patients, since these comprise a significant part of the target population. Also, this study is one of the first to prospectively measure functional outcome and quality of life in cSDH patients. Final results of this study are expected in 2024.

Trial registration

Dutch Trial Registry (Nederlands Trial Register) NL6584. Registered on 11 November 2017

ClinicalTrials.govNCT03582293. Registered on 11 July 2018

EU Clinical Trials Register 2017-004311-40. Registered on 29 March 2018

Unusual Etiology for a Chronic Subdural Hematoma: Whole-Body Vibration Machine

A chronic subdural hematoma is more common in the elderly, particularly after a minor trauma sustained several weeks before the diagnosis. The use of a whole-body vibration machine had not been reported as an etiology. We report an 80-year-old male patient without a history of head or body trauma who developed a bilateral chronic subdural hematoma and required surgery to drain the hematoma. Four weeks before the diagnosis, he purchased and used a whole-body vibration machine. The first time he used the whole-body vibration machine, he felt his brain vibrating and rotating and could not tolerate more than two minutes. The event was so annoying that he did not use it again. In this patient, using a whole-body vibration machine may have led to the formation of the chronic subdural hematoma.

Adjuvant Corticosteroids With Surgery for Chronic Subdural Hematoma: A Systematic Review and Meta-Analysis

The use of adjuvant corticosteroids with surgery for chronic subdural hematoma (CSDH) has received considerable attention in recent years. However, there is no conclusive evidence regarding its effectiveness and safety for CSDH. Therefore, we performed a meta-analysis and systematic review to evaluate the effectiveness and safety of corticosteroids as an adjuvant treatment for the treatment of CSDH. We comprehensively searched electronic databases (PubMed, EMBASE, Cochrane Library, and Web of Science) to identify relevant trials that investigated the efficacy and safety of adjuvant corticosteroids with surgery for CSDH, published from inception until May 2021. Outcome measures included recurrence rate, all-cause mortality, good functional outcome, length of hospitalization, and adverse events. We used the Cochrane risk of bias method to evaluate the quality of randomized controlled trials (RCTs), and the Newcastle Ottawa Scale to evaluate the quality of observational studies. We included nine studies, consisting of three RCTs and six observational studies, that compared corticosteroids as an adjuvant treatment to surgery with surgery alone. Pooled results revealed that the risk of recurrence was significantly reduced in patients who received adjuvant corticosteroids with surgery compared to those who underwent surgery alone (relative risk [RR] = 0.52, 95% confidence interval [CI] = 0.39–0.69, p < 0.00001). However, no statistically significant difference was observed between these groups in all-cause mortality (RR = 0.91, 95% CI = 0.37–2.23, p = 0.83), good functional outcome (RR = 1.03, 95% CI = 0.96–1.10, p = 0.47), length of hospitalization (MD = 0.35, 95% CI = –2.23 to 1.67, p = 0.83), and infection rates (RR = 0.99, 95% CI = 0.64–1.53, p = 0.95). Adjuvant corticosteroids with surgery reduce the risk of recurrence of CDSH, but do not improve the all-cause mortality or functional outcome, as compared to surgery alone. These findings support the use of adjuvant corticosteroids with surgery for CSDH patients. Further high-quality RCTs are required to confirm the efficacy and safety of adjuvant corticosteroids in the treatment of CSDH patients.

Surgical management of chronic subdural hematomas through single-burr hole craniostomy: is it sufficient?

Background

Symptomatic chronic subdural hematomas (CSDH) remain one of the most encountered forms of intracranial hemorrhages particularly in the elder patients, yet fortunately implies a good surgical prognosis. Burr hole evacuation under general anesthesia is the most commonly used neurosurgical technique for the management of CSDH. Clinical disagreement between many studies regarding the number of burr holes required to achieve the optimal surgical and clinical outcome has long existed. The objective of this study is to evaluate the prognosis and clinical outcome following the use of single-burr hole craniostomy technique in the aim of surgical evacuation of CSDH.

Results

This is a retrospective study of 30 patients, with symptomatic unilateral or bilateral CSDH managed by the authors strictly by single-burr hole evacuation with closed-system drainage on the corresponding site of the hematoma. Clinical outcome was then assessed at 1, 7, and 30 days after surgery using the Glasgow Coma Scale (GCS) and by comparing the Markwalder grade scale before surgery to 1 month following surgery; the pre- and post-operative radiological data, clinical neurological progress and the possible incidence of complications postoperatively were also recorded. Study duration was from August 2019 to October 2020. Our study included 18 (60%) male patients and 12 (40%) female patients. The main presenting symptom was altered level of consciousness noted in 29 (96.7%) patients; a history of a relevant head trauma was recorded in 11 patients (36.7%). The GCS showed a statistically highly significant improvement comparing the preoperative to the postoperative values throughout the follow-up intervals (p = 0.001); similarly, the Markwalder score significantly improved 1 month after surgery, where 17 (63%) patients were Markwalder grade 0, 9(33.3%) patients were grade 1, a single patient (3.7%) was grade 2, and none were Markwalder grade 3.

Conclusion

Our study concluded that single-burr hole craniostomy with closed-system drainage for the management of symptomatic CSDH would be a sufficient approach to achieve a good surgical outcome with a low complication rate. Larger series and further studies would be yet considered with longer follow-up periods.

Middle Meningeal Artery Embolization and the Treatment of a Chronic Subdural Hematoma

Chronic subdural hematoma (cSDH) is a common pathology that typically affects the elderly. It is believed to occur due to injury to the dural border cells, which creates an inflammation/proliferation reaction. Ineffective repair leads to the formation of a new external layer of cells and fragile capillaries, which damage easily and can worsen the condition. Conventionally, asymptomatic cSDH is managed by observation, and symptomatic cases are treated by surgical evacuation. Unfortunately, recurrence rates of the SDH following surgical evacuation can be high. One treatment option for SDH involves embolization of the middle meningeal artery (MMA). The MMA provides blood supply to the dura mater and feeds the membrane capillaries covering the SDH. MMA embolization blocks the blood flow to this system and can promote hematoma resolution. In this paper, we review the existing literature on MMA embolization and discuss the underlying pathophysiology of cSDH.

Surgical Management of Chronic Subdural Hematoma in Older Adults: A Systematic Review

BACKGROUND

Chronic subdural hematoma (cSDH) is a form of intracranial hemorrhage common in older adults. Optimal treatment remains controversial. We conducted a systematic review to identify surgical thresholds, characterize outcomes, and delineate critical considerations in the surgical management of older adults in order to summarize the evidence supporting the best contemporary management of cSDH.

METHODS

A systematic review exploring surgical management of cSDH among individuals aged 65 years and older was conducting by searching the PubMed, Embase, and Scopus databases for articles in English. Abstracts from articles were read and selected for full-text review according to a priori criteria. Relevant full-text articles were analyzed for bibliographic data, aim, study design, population, interventions, and outcomes.

RESULTS

Of 1473 resultant articles, 21 were included. Surgery rationale was case-by-case for symptomatic patients with cSDH. Surgery was superior to conservative management and promoted equivalent neurologic outcomes and rates of complications. Recurrence and reoperation rates in older adults were similar to younger individuals. Some studies reported higher mortality rates for older adults, while others reported no difference. Anticoagulation or antiplatelet agent use did not seem to be associated with poorer outcomes in older adults.

CONCLUSIONS

Surgery for cSDH in older adults leads to favorable neurologic outcomes without increased risk of overall complications, recurrence, or reoperation compared to younger patients. However, older adults may be at increased risk for mortality after surgery. It is important to determine use of anticoagulant or antiplatelet agents in older adults to optimally manage patients with cSDH.

Chronic subdural hematoma-induced parkinsonism: A systematic review

BACKGROUND

Chronic subdural hematoma (CSDH) is one of the most common neurosurgical cases, especially in elderly individuals. Secondary parkinsonism due to CSDH is a rare entity. The mechanism of parkinsonism symptoms in chronic subdural hematoma has been suggested to include direct mechanical compression of the basal ganglia due to hematoma or indirectly through brain structure changes due to space lesions and vascular disorders. Surgery on the subdural hematoma provides a favorable outcome for parkinsonism symptoms.

OBJECTIVES

To systematically review the literature on CSDH-induced parkinsonism.

SEARCH METHODS

This is a systematic review on case reports. Literature search was performed using the predefined keywords on PubMed, ProQuest, and Google Scholar. We also provided our own case report and compared it with published studies.

RESULT

Sixteen cases from 13 case reports/series were identified, predominantly consisting of male patients with the mean age of 66.5 ± 9.73 years. The most common symptoms were rigidity, gait disturbance, and bradykinesia, observed in 12 (75%) cases each. The second and third most common symptoms were tremor (11; 68.75%) and facial masking (8; 50%), respectively. Other reported symptoms were dysphasia (3; 18.75%), dysarthria (3; 18.75%), and urinary incontinence (2; 12. 5%). Time gap between the symptom onset and CSDH diagnosis and unilateral location seemed to influence the outcome.

CONCLUSION

Only 16 CSDH-induced parkinsonism were identified since the 1960s. This condition is thought to occur due to basal ganglia compression. Surgery on the subdural hematoma provides a favorable outcome for parkinsonism symptoms. Timely CSDH diagnosis might yield better outcome. However, further research on CSDH-induced parkinsonism is needed, especially in the mechanisms and treatment outcomes.

Impaired cerebrospinal fluid transport due to idiopathic subdural hematoma in pig: an unusual case

BACKGROUND

We report the effects of the presentation of an idiopathic subdural hematoma (SDH) in an adult domestic pig on the glymphatic system, a brain-wide solute clearance system. This accidental finding is based on our recently published study that described this system for the first time in large mammals. Our current results define the need to investigate cerebrovascular pathologies that could compromise glymphatic function in gyrencephalic animal models as a tool to bridge rodent and human glymphatic studies.

CASE PRESENTATION

The pig underwent intracisternal infusion of a fluorescent tracer under general anesthesia to delineate cerebrospinal fluid (CSF) pathways, and was euthanized at the end of 3 h of tracer circulation. During brain isolation, a hematoma measuring approximately 15 × 35 mm in size beneath the dura was evident overlying fronto-parietal brain surface. Interestingly, CSF tracer distribution was markedly reduced on dorsal, lateral and ventral surfaces of the brain when compared with a control pig that was infused with the same tracer. Furthermore, regional distribution of tracer along the interhemispheric fissure, lateral fissure and hippocampus was 4-5-fold reduced in comparison with a control pig. Microscopically, glial-fibrillary acidic protein and aquaporin-4 water channel immunoreactivities were altered in the SDH pig brain.

CONCLUSIONS

This is the first case of impaired glymphatic pathway due to an idiopathic SDH in a pig. Potential etiology could involve an acceleration-deceleration injury inflicted prior to arrival at our housing facility (e.g., during animal transportation) leading to disruption of bridging veins along the superior sagittal sinus and impairing CSF pathways in the whole brain. This accidental finding of globally impaired glymphatic function sheds light on a novel consequence of SDH, which may play a role in the enhanced cognitive decline seen in elderly presenting with chronic SDH.

Effect of Steroids as an Adjunct to Surgical Treatment in Patients with Chronic Subdural Hematoma

The role of steroids as an adjunct to surgery for chronic subdural hematoma (cSDH) remains unclear. We evaluated the effect of steroids as an adjunct to surgery on recurrence rates, complications, and mortality. We retrospectively collected data of 525 patients operated on for cSDH between January 2010 and April 2015 at the Amsterdam University Medical Centers and Erasmus Medical Center Rotterdam. Data from patients with and without steroid use as an adjunct to surgery were obtained from medical records and compared using the chi-square test, independent-samples t-test, and Mann-Whitney U test, where applicable. Associations between adjuvant steroid use and complications were analyzed with univariable (penalized likelihood) logistic regression analysis. Multi-variate logistic regression was performed to analyze the influence of adjuvant steroid use on recurrence. Propensity-score matching was used to assemble a cohort of patients with similar baseline characteristics. Two hundred seventy-eight of the 525 patients (53%) were treated with adjuvant steroids. Surgery for recurrences occurred less in patients of the steroid group (9% vs. 14%; odds ratio [OR] 0.57; 95% confidence interval [CI], 0.33-0.99), but the effect was not significant after correction for confounders (adjusted aOR, 0.59; 95% CI, 0.33-1.05). In the steroid group, delirium (10% vs. 3%; OR, 3.99; 95% CI, 1.72-9.29) and dysregulated glucose levels occurred more frequently (2% vs. 0%; OR, 11.81; 95% CI, 1.38-1542.79), but multi-variate analysis was not possible. After propensity-score matching, McNemar's chi-square test showed that adjuvant steroid use was not significantly associated with recurrence rate (p = 0.10). Steroids as an adjunct to surgery in patients with cSDH did not have a favorable effect on the recurrence rate in our data after controlling for confounders.

Spontaneous and recurrent subdural haematoma in a patient with May-Hegglin anomaly

Both acute and chronic subdural haematomas typically occur following trauma. Non-traumatic causes are less common, but aetiologies include arteriovenous malformation, intracranial aneurysm rupture, tumour-associated haemorrhage and coagulopathies. May-Hegglin anomaly is an example of a coagulopathy, which is caused by a mutation in the gene encoding non-muscle myosin heavy chain 9 (MYH9) and therefore falls into a group of diseases referred to as MYH9-related diseases (MYH9-RD). The symptomology of MYH9-RD is often mild, and patients tend to experience epistaxis, gingival bleeding and bruising. Life-threatening haemorrhage rarely occurs. In this short report, we describe a patient with known May-Hegglin anomaly who presented with a potentially life-threatening, spontaneous subdural haematoma requiring surgery on two occasions. This is only the second such report in the literature, and the first of spontaneous and recurrent haemorrhage in association with May-Hegglin anomaly.

Mild Head Trauma: Is Antiplatelet Therapy a Risk Factor for Hemorrhagic Complications?

Background and objectives: In patients who receive antiplatelet therapy (APT), the bleeding risk profile after mild head trauma (MHT) still needs clarification. Some studies have demonstrated an association with bleeding risk, whereas others have not. We studied the population of our level II emergency department (ED) trauma center to determine the risk of bleeding in patients receiving APT and whether bleeding results not from antiplatelet agents but rather from age. We assessed the bleeding risk, the incidence of intracranial hemorrhage (ICH) that necessitated hospitalization for observation, the need for cranial neurosurgery, the severity of the patient's condition at discharge, and the frequency of ED revisits for head trauma in patients receiving APT. Materials and Methods: This retrospective single-center study included 483 patients receiving APT who were in the ED for MHT in 2019. The control group consisted of 1443 patients in the ED with MHT over the same period who were not receiving APT or anticoagulant therapy. Our ED diagnostic therapeutic protocol mandates both triage and the medical examination to identify patients with MHT who are taking any anticoagulant or APT. Results: APT was not significantly associated with bleeding risk (p > 0.05); as a risk factor, age was significantly associated with the risk of bleeding, even after adjustment for therapy. Patients receiving APT had a greater need of surgery (1.2% vs. 0.4%; p < 0.0001) and a higher rate of hospitalization (52.9% vs. 37.4%; p < 0.0001), and their clinical condition was more severe (evaluated according to the exit code value on a one-dimensional quantitative five-point numerical scale) at the time of discharge (p = 0.013). The frequency of ED revisits due to head trauma did not differ between the two groups. Conclusions: The risk of bleeding in patients receiving APT who had MHT was no higher than that in the control group. However, the clinical condition of patients receiving APT, including hospital admission for ICH monitoring and cranial neurosurgical interventions, was more severe.

Snowfall reduces the risk of chronic subdural hematoma onset: Analysis of an administrative database in Japan

Background:

Chronic subdural hematoma (CSDH) is a frequently observed disease in neurosurgical practice. Although first snowfall has been considered to increase the onset of CSDH, few reports have assessed the relationship between snowfall and CSDH. In this study, we aimed to investigate the relationship between CSDH onset and first snowfall events.

Methods:

This retrospective study was based on the Japanese Diagnosis Procedure Combination inpatient database from July 1, 2010, to March 31, 2016, and on the global observation of snowfall events in Japan obtained from the Japan Meteorological Agency. We used a binomial approximation to evaluate the average number of CSDH patients after first snowfall events compared with that before first snowfall events. We calculated the odds ratio of CSDH onset on the first snowfall.

Results:

We identified 8526 CSDH patients from the database. A total of 5573 (65.4%) were observed before first snowfall events, and 2953 (34.6%) after first snowfall events. The first snowfall of winter was significantly associated with a reduction in the occurrence of CSDH (odds ratio, 0.53; 95% confidence interval; 0.51–0.55). In subgroup analysis, only the first snowfall in October was not associated with reduction in the occurrence of CSDH.

Conclusion:

First snowfall events did not affect the onset of CSDH in Japan.

Antiplatelet and anticoagulant agents have minimal impact on traumatic brain injury incidence, surgery, and mortality in geriatric ground level falls: A multi-institutional analysis of 33,710 patients

BACKGROUND

Falls are the leading cause of traumatic brain injury (TBI) and TBI-related deaths for older persons (age, ≥65 years). Antiplatelet and/or anticoagulant therapy (antithrombotics [ATs]) is generally felt to increase this risk, but the literature is inconsistent. The purpose of this study was to determine the impact of AT use on the rate, severity, and outcomes of TBI in older patients following ground level falls.

METHODS

Ground level fall patients from 90 hospitals' trauma registries were selected. Patients were excluded if younger than 65 years or had an Abbreviated Injury Scale score of >2 in a region other than head. Electronic medical record data for preinjury AT therapy were obtained. Patients were grouped by regimen for no AT, single, or multiple agents. Groups were compared on rates of diagnosed TBI, TBI surgery, and mortality.

RESULTS

There were 33,710 patients (35% male; mean age, 80.5 years; mean Glasgow Coma Scale, 14.6), with 47.6% on single or combination AT therapy. The proportion of patients with TBI diagnoses did not differ between those on no AT (21.25%) versus AT (21.61%; p = 0.418). Apixaban (15.7%; p < 0.001) and rivaroxaban (13.19%; p = 0.011) were associated with lower rates of TBI, and acetylsalicylic acid-clopidogrel was associated with a higher TBI rate (24.34%; p = 0.002) versus no AT. acetylsalicylic acid-clopidogrel was associated with a higher cranial surgery rate (2.9%; p = 0.006) versus no AT (1.96%), but surgery rates were similar for all other regimens. No regimen was associated with higher mortality.

CONCLUSION

In this large multicenter study, the intake of ATs in older patients with ground level falls was associated with inconsistent effects on risk of TBI and no significant increases in mortality, indicating that AT use may have negligible impact on patient clinical management. A large, confirmatory, prospective study is needed because the commonly held belief that ATs uniformly increase the risk of traumatic intracranial bleeding and mortality is not supported.

LEVEL OF EVIDENCE

Therapeutic/care management, level II.

A venous mechanism of ventriculomegaly shared between traumatic brain injury and normal ageing

Recently, age-related timing dissociation between the superficial and deep venous systems has been observed; this was particularly pronounced in patients with normal pressure hydrocephalus, suggesting a common mechanism of ventriculomegaly. Establishing the relationship between venous drainage and ventricular enlargement would be clinically relevant and could provide insight into the mechanisms underlying brain ageing. To investigate a possible link between venous drainage and ventriculomegaly in both normal ageing and pathological conditions, we compared 225 healthy subjects (137 males and 88 females) and 71 traumatic brain injury patients of varying ages (53 males and 18 females) using MRI-based volumetry and a novel perfusion-timing analysis. Volumetry, focusing on the CSF space, revealed that the sulcal space and ventricular size presented different lifespan profiles with age; the latter presented a quadratic, rather than linear, pattern of increase. The venous timing shift slightly preceded this change, supporting a role for venous drainage in ventriculomegaly. In traumatic brain injury, a small but significant disease effect, similar to idiopathic normal pressure hydrocephalus, was found in venous timing, but it tended to decrease with age at injury, suggesting an overlapping mechanism with normal ageing. Structural bias due to, or a direct causative role of ventriculomegaly was unlikely to play a dominant role, because of the low correlation between venous timing and ventricular size after adjustment for age in both patients and controls. Since post-traumatic hydrocephalus can be asymptomatic and occasionally overlooked, the observation suggested a link between venous drainage and CSF accumulation. Thus, hydrocephalus, involving venous insufficiency, may be a part of normal ageing, can be detected non-invasively, and is potentially treatable. Further investigation into the clinical application of this new marker of venous function is therefore warranted.

Incidence of chronic subdural haematoma: a single-centre exploration of the effects of an ageing population with a review of the literature

BACKGROUND

Chronic subdural haematoma (cSDH) is a common neurosurgical pathology frequently occurring in older patients. The impact of population ageing on cSDH caseload has not been examined, despite relevance for health system planning.

METHODS

This is a single-centre study from the UK. Operated cases of cSDH (n = 446) for 2015-2018 were identified. Crude and directly standardised incidence rates were calculated. Medline and EMBASE were systematically searched to identify studies reporting on the incidence of cSDH by year, so an estimate of rate of incidence change could be determined. Local incidence rates were then applied to population projections for local catchment area to estimate operated cSDH numbers at 5 yearly intervals due to shifting demographics.

RESULTS

We identified nine studies presenting incidence estimates. Crude estimates for operative cases ranged from 1.3/100,000/year (1.4-2.2) to 5.3/100,000/year (4.3-6.6). When non-operated cases were included, incidence was higher: 8.2/100,000/year (6.0-11.2) to 48/100,000/year (37.7-61.1). Four pairs of studies demonstrated incidence rate increases of 200-600% over the last 50 years, but data was deemed too heterogeneous to generate formal estimate of incidence change. Local crude incidence of operated cSDH was 3.50/100,000/year (3.19-3.85). Directly standardised incidence was 1.58/100,000/year (1.26-1.90). After applying local incidence rates to population projections, case numbers were predicted to increase by 53% over the next 20 years.

CONCLUSIONS

The incidence of cSDH is increasing. We project a 53% increase in operative caseload within our region by 2040. These are important findings for guiding future healthcare planning.

A Comparative Study of Chronic Subdural Hematoma in Patients With and Without Head Trauma: A Retrospective Cross Sectional Study

Background: The clinical features of chronic subdural hematomas (CSDHs) in patients with and without a history of head trauma have remained unclear. Here, we investigated differences in clinical characteristics in CSDH patients with and without head trauma. Methods: We retrospectively collected clinical characteristics of CSDH patients who had undergone exhaustive drainage strategies via burr-hole craniostomies from August 2011 to May 2019. We divided patients into a trauma group (i.e., head trauma) and a no-trauma group. Chi-square tests or t-tests were used to analyze differences in clinical characteristics between the two groups. Multiple linear regression analysis was performed to analyze the relationships between the clinical characteristics and either reduction of the hematoma cavity or length of the hospital stay in CSDH patients with trauma. Results: We collected data from 1,307 CSDH patients, among whom 805 patients had a history of head trauma whereas 502 patients did not. The mean age of patients with head trauma was 64.0 ± 16.1 years, while that of patients without head trauma was significantly younger at 61.5 ± 17.9 years (p = 0.010). Furthermore, more patients in the no-trauma group had a history of hypertension compared to those in the trauma group (40.2 vs. 32.9%, p = 0.007). Dizziness occurred in 29.2% of patients with trauma and in 23.1% of patients without trauma (p = 0.016). A greater number of patients with trauma showed a reduction of hematoma cavity after surgery compared to that of patients without trauma (p = 0.002). The length of hospital stay in patients with trauma was 7.9 ± 4.5 days, which was longer than that of patients without trauma (7.3 ± 3.7 days, p = 0.016). In contrast, there were no significant different differences between the two groups in terms of the densities of hematomas on computed-tomography scans, complications, mortality rates, recurrence rates, or outcomes. Conclusion: Our findings indicate that there were some noteworthy differences in the clinical and pathogenic characteristics of CSDH patients with and without head trauma. However, our findings also indicate that if an optimal treatment method is employed, such as our exhaustive drainage strategy, similar treatment outcomes can be achieved between these groups.

Antiplatelet therapy is associated with a high rate of intracranial hemorrhage in patients with head injuries

Background

Antiplatelet agents are increasingly used in cardiovascular treatment. Limited research has been performed into risks of acute and delayed traumatic intracranial hemorrhage (ICH) in these patients who sustain head injuries. Our goal was to assess the overall odds and identify factors associated with ICH in patients on antiplatelet therapy.

Methods

A retrospective observational study was conducted at two level I trauma centers. Adult patients with head injuries on antiplatelet agents were enrolled from the hospitals’ trauma registries. Acute ICH was diagnosed by head CT. Observation and repeat CT to evaluate for delayed ICH was performed at clinicians’ discretion. Patients were stratified by antiplatelet type and analyzed by ICH outcome.

Results

Of 327 patients on antiplatelets who presented with blunt head trauma, 133 (40.7%) had acute ICH. Three (0.9%) had delayed ICH on repeat CT, were asymptomatic and did not require neurosurgical intervention. One with delayed ICH was on clopidogrel and two were on both clopidogrel and aspirin. Patients with delayed ICH compared with no ICH were older (94 vs 74 years) with higher injury severity scores (15.7 vs 4.4) and trended towards lower platelet counts (141 vs 216). Patients on aspirin had a higher acute ICH rate compared with patients on P2Y12 inhibitors (48% vs 30%, 18% difference, 95% CI 4 to 33; OR 2.18, 95% CI 1.15 to 4.13). No other group comparison had significant differences in ICH rate.

Conclusions

Patients on antiplatelet agents with head trauma have a high rate of ICH. Routine head CT is recommended. Patients infrequently developed delayed ICH. Routine repeat CT imaging does not appear to be necessary for all patients.

Level of evidence

Level III, prognostic.

Role of brain natriuretic peptide in the prediction of long-term surgical outcome of chronic subdural hematoma

OBJECTIVE

To investigate the role of brain natriuretic peptide (BNP) in predicting long-term functional outcome and develop a new predictive score of poor functional outcome after surgery for chronic subdural hematoma (cSDH).

METHODS

Patients with cSDH that were surgically treated in our department between November 2016 and December 2019 were included in the study. Pre- and postoperative plasma BNP and clinical condition were prospectively recorded. At follow-up (5-6 months), a simplified modified Rankin Scale (mRS) questionnaire was conducted through a standardized telephone interview. A poor outcome was defined by a mRS > 3. Based on predictors of the long-term functional outcome, a score was calculated. Its accuracy was tested using the area under the curve (AUC) of the receiver operating characteristic analysis.

RESULTS

In total, 119 patients were analyzed (median age: 76 years, range: 44-94 years). Preoperative plasma BNP (BNP-1) was elevated in 77 patients (64.7%). For the follow-up phone interview, 101 patients (84.8%) were available. In the multivariate analysis, poor outcome at follow-up could be predicted using BNP-1 (p = 0.034), age (p = 0.036), motor deficit (p = 0.013) and Glasgow coma scale score on admission (p = 0.008). The "Functional Long-term Outcome Predictive score" (FLOP-score) was therefore computed, and revealed an excellent discriminative capacity compared to other scores, with an AUC of 0.86 (0.77-0.95).

CONCLUSIONS

Preoperative plasma BNP is an independent predictor of functional outcome at follow-up. Using the FLOP-score, the risk of experiencing a poor outcome could accurately be predicted.

An open label randomized trial to assess the efficacy of tranexamic acid in reducing post-operative recurrence of chronic subdural haemorrhage

Chronic subdural haemorrhage (CSDH) is a common neurosurgical entity with complex pathophysiological pathways. The generally favourable surgical outcome may be affected by its associated risks including recurrence rates. We performed a prospective randomized multi-center clinical trial comparing the addition of tranexamic acid (TXA) to standard neurosurgical procedures for patients with symptomatic CSDH. The primary endpoint was CSDH requiring repeat surgery within 6-month post-operatively. Secondary endpoints were comparison of post-operative volumes between the treatment arms and safety evaluation of the dosing regime. 90 patients were analyzed with 49 patients in the observation arm and 41 patients in the TXA arm. The observation arm had five (10.2%) recurrences compared to two (4.8%, p = 0.221) in the TXA arm. Patients in the TXA arm demonstrated a greater reduction of their CSDH volume at 6 weeks follow up (36.6%) compared to the observation arm (23.3%, p = 0.6648). There were no reportable serious adverse events recorded in the observation arm, compared to 4 (9.8%) patients in the TXA arm. The addition of TXA treatment to standard surgical drainage of CSH did not significantly reduce symptomatic post-operative recurrence. Patients in the TXA arm had a delay in the CSDH recurrence with a comparative reduction of residual hematoma volume at the 6-week follow up although the effect was unsustained. Larger randomized trials with dose adjustments should be considered to investigate subgroups of patients that may benefit from this medical adjunct.

Middle Meningeal Artery Embolization for Chronic Subdural Hematoma

Chronic subdural hematoma (cSDH) is a common disease process associated with significant morbidity that occurs most often in elderly patients. Asymptomatic patients are typically treated conservatively, with surgical intervention reserved for patients with symptomatic and/or large hematomas that cause brain compression. However, conservatively managed cSDH cases frequently progress, and surgical evacuation of cSDH is associated with high rates of complication and recurrence. Recently, successful treatment of cSDH via middle meningeal artery (MMA) embolization has been reported in small case series and case reports. This article reviews the existing literature on MMA embolization for cSDH and discusses the need for randomized control trials and/or large prospective studies to establish the efficacy of MMA embolization for this disease.