Clinical Report: Aligning Research with Clinical Needs in Chronic Subdural Hematoma

Overview

Chronic subdural hematoma (CSDH) is a growing neurosurgical challenge predominantly affecting the elderly, with significant morbidity and mortality. This systematic review gap analysis highlights discrepancies between current research focuses and the broad clinical needs identified by multidisciplinary stakeholders, emphasizing underexplored areas such as non-operative management and long-term care.

Background

CSDH is characterized by the accumulation of aged blood in the subdural space, often presenting with symptoms similar to a slowly evolving stroke. Surgical evacuation remains the gold standard treatment, yet the condition is increasingly prevalent due to aging populations, with operative cases expected to rise by over 50% in the next two decades. Despite targeted research on surgical interventions and adjuvant therapies, inconsistencies and gaps remain, particularly regarding non-surgical management and multidisciplinary care. The Improving Care in Elderly Neurosurgery Initiative (ICENI) has developed comprehensive clinical practice guidelines to address these gaps by identifying priority clinical questions through a broad stakeholder consensus.

Data Highlights

The umbrella review included systematic reviews published between 2000 and 2022, identified through a comprehensive search of Medline, Embase, Cochrane Library, and CINAHL databases. The review focused on aligning existing evidence with clinical questions developed by multidisciplinary groups covering diagnosis, non-operative management, surgical care, peri-operative care, and rehabilitation. The analysis revealed a predominance of research on surgical interventions within specialist centers, with limited systematic reviews addressing non-operative or long-term care aspects of CSDH management.

Key Findings

• CSDH incidence is rising, with operative cases predicted to increase by over 50% in the next 20 years due to aging populations.
• Current research predominantly focuses on surgical treatment modalities, such as the use of surgical drains and adjuvant steroid therapy.
• Significant knowledge gaps exist in non-operative management, long-term care, and multidisciplinary challenges involving geriatrics, emergency medicine, anesthesia, and general practice.
• Clinical practice guidelines developed by ICENI incorporate broad stakeholder input to identify priority research questions across the entire CSDH care pathway.
• Systematic reviews often do not address the full spectrum of clinical needs, highlighting a misalignment between research activity and everyday clinical practice requirements.

Clinical Implications

Clinicians should be aware that while surgical management of CSDH is well-studied, evidence for non-operative and long-term care remains limited, necessitating cautious interpretation of guidelines in these areas. Multidisciplinary collaboration is essential to address the broader clinical challenges and improve patient outcomes. Future research should prioritize identified knowledge gaps to better align with real-world clinical needs.

Conclusion

This gap analysis underscores the need for a more comprehensive research agenda in CSDH that extends beyond surgical interventions to include non-operative management and multidisciplinary care. Aligning research efforts with clinical priorities will facilitate evidence-based practice and improve outcomes for this vulnerable patient population.

References

1. Improving Care in Elderly Neurosurgery Initiative (ICENI) -- Clinical Practice Guideline Development for CSDH
2. Fusar-Poli and Radua 2018 -- Umbrella Review Methodology
3. Society of British Neurological Surgeons (SBNS) -- Support for CSDH Guideline Development