Chronic Subdural Hematoma (CSDH)
A progressive collection of liquefied blood and breakdown products beneath the dura mater, commonly following mild head trauma.
What is Chronic Subdural Hematoma (CSDH)?
A chronic subdural hematoma is an encapsulated collection of liquefied blood and breakdown fluids located between the dura mater and arachnoid membranes covering the brain. It develops over weeks or months, typically following minor or forgotten head bumps, especially in older adults or individuals taking blood thinners.
Common Symptoms & Signs
- Progressive dull, persistent headache worsening over weeks
- Gradual cognitive decline, confusion, or memory changes frequently mistaken for dementia
- Unsteadiness, gait disturbance, and frequent falls
- Mild one-sided weakness or clumsiness in the hand or leg
- Speech slowing or mild expressive dysphasia
Causes and Risk Factors
- •Minor head trauma (often minor impact from everyday bumps weeks prior)
- •Age-related cerebral atrophy stretching fragile bridging veins
- •Anticoagulant or antiplatelet medications (blood thinners)
- •Systemic inflammatory processes promoting fragile neo-membrane capillary leakage
Diagnostic Procedures & Imaging
When Urgent Medical Evaluation is Required
- •Rapidly decreasing level of alertness or unresponsiveness
- •Profound or sudden paralysis of one side of the body
- •Pupil asymmetry (one pupil larger than the other)
- •Seizure activity or repetitive twitching
Treatment Modalities
Non-Surgical & Medical
- •Careful neurological observation for small, asymptomatic hematomas without midline shift
- •Temporary discontinuation or reversal of blood-thinning medications under hematology guidance
- •Medical therapy regimens (such as corticosteroids or tranexamic acid under ongoing clinical investigation)
Surgical Interventions
- •Burr Hole Trephination & Drainage: Creation of one or two small openings in the skull to gently evacuate and irrigate the fluid collection and place a closed subdural drain
- •Twist-Drill Craniostomy: A bedside or minimally invasive drainage technique for suitable liquefied hematomas
- •Craniotomy: Reserved for recurrent, organized, or solid multiseptated hematomas requiring membrane excision
When is Surgery Considered?
Surgical intervention is indicated when the hematoma causes significant mass effect on the brain, midline brain shift greater than 5mm, or progressive neurological symptoms such as gait failure or limb weakness.
What a Consultation Involves
A consultation involves analyzing the non-contrast CT scan to measure hematoma thickness, internal density (homogenous vs separated/trabecular), midline shift, and evaluating the patient's neurological baseline and medications.
Frequently Asked Questions
How long does recovery take after burr hole drainage?
Most patients notice rapid improvement in confusion and weakness within 24 to 48 hours of fluid evacuation. Full cognitive and motor recovery continues over several weeks with follow-up CT imaging to confirm brain re-expansion.
Can chronic subdural hematomas come back after surgery?
Recurrence occurs in approximately 10% to 15% of cases due to re-bleeding from fragile capillary membranes. Placing a subdural drain and managing inflammatory and clotting indices helps minimize this risk.
Surgical Interventions for Chronic Subdural Hematoma (CSDH)
- [1] Vitowanu JM, et al. Impact of inflammatory cell ratio, biomarkers, aPTT and PT on chronic subdural haematoma severity and outcome. 2023.
- [2] Kolias AG, et al. Chronic subdural haematoma: modern management and emerging therapies. Nat Rev Neurol. 2014.
Discuss This Condition
Have your scans and clinical records evaluated for diagnostic clarity or surgical indication.