Management of Elderly Patients with Subdural Hematoma

Admission and Monitoring

• The American College of Surgeons recommends immediate hospital admission to a monitored setting with serial neurological assessments and neurosurgical consultation for patients with subdural hematoma, regardless of GCS score, due to the risk of delayed deterioration 1, 2
• Approximately 1 in 4 patients with mild traumatic brain injury (GCS 13-15) and abnormal neurological findings will require treatment, making admission mandatory 1
• The British Journal of Anaesthesia recommends admission with close neurological observation for 24-72 hours rather than immediate surgery for patients with GCS 14 and focal deficits, which applies to this patient with GCS 13 and focal weakness 1, 2

Observation Protocol

• Perform GCS monitoring every 15 minutes for the first 2 hours, then hourly for 12 hours 1
• Document individual GCS components (Eye, Motor, Verbal) rather than sum scores, as component profiles predict outcomes 1
• Assess pupillary size and reactivity at each evaluation, as these are critical prognostic indicators 1
• Monitor for focal neurological deficits and level of confusion/orientation hourly 2

Critical Thresholds for Intervention

• A decrease of 2 or more points in GCS score warrants immediate repeat CT scanning and neurosurgical consultation 1
• Development of new focal neurological deficits or signs of herniation (pupillary changes) indicates need for surgical evacuation 1, 2

ICU vs. General Admission Decision

• The American Society of Anesthesiologists suggests ICU admission is appropriate for patients with GCS 13, focal deficit, and elderly status, though intubation is not immediately indicated if airway is protected 1
• Maintain mean arterial pressure ≥80 mmHg to ensure adequate cerebral perfusion 1, 3
• Maintain oxygen saturation >95% to prevent hypoxemic secondary injury 1

Neurosurgical Consultation Timing

• Obtain immediate neurosurgical consultation at presentation, not just if deterioration occurs 2

Indications for Surgical Evacuation

• Clinical deterioration with GCS decline ≥2 points 1
• Development of additional focal neurological deficits indicating mass effect 1
• Signs of herniation (pupillary changes, posturing) 1
• Failure to show neurological improvement within 72 hours 1

Critical Pitfalls to Avoid

• Never administer long-acting sedatives or paralytics before neurosurgical evaluation, as this masks clinical deterioration 1, 2
• Do not discharge based solely on "mild" GCS of 13-14, due to the combination of elderly age, confusion, focal weakness, and confirmed subdural hematoma creating unacceptably high risk 2
• Do not delay correction of secondary insults (hypotension, hypoxia) while waiting to prognosticate 1
• Do not make irreversible decisions before 72 hours unless brain death criteria are met or clear clinical deterioration occurs 1
• Serial GCS assessments provide substantially more valuable information than single determinations, as declining scores indicate poorer prognosis 1

Prognostic Factors

• Focal deficits, such as left-sided weakness, indicate significant mass effect or underlying brain injury 4

Management of Subdural Hematoma in Elderly Patients

Introduction to Conservative Management

• The American College of Emergency Physicians suggests that elderly patients on anticoagulation or antiplatelet therapy have a higher risk of delayed acute subdural hematoma, with 70% deteriorating within the first 24 hours 5, 6

Special Considerations in the Elderly

• Elderly patients with age >60 years have an increased risk of abnormal CT findings and deterioration, according to the American Geriatrics Society 5, 6
• Delayed hemorrhage occurs in 1.4-4.5% of anticoagulated patients even with initially negative CT, necessitating 24-hour repeat imaging, as recommended by the American College of Emergency Physicians 5, 6

Management of Subdural Hematoma

Patient Management

• Patients with subdural hematoma should be managed in centers with neurosurgical expertise, as recommended by the International Journal of Stroke guidelines 7, 8
• The American College of Emergency Physicians suggests that mandatory 24-hour observation with repeat CT scan at 20-24 hours post-initial scan is necessary for anticoagulated patients 9
• The American Society of Anesthesiologists recommends considering ICP monitoring after SDH evacuation if preoperative GCS motor response ≤5, preoperative anisocoria or bilateral mydriasis, preoperative hemodynamic instability, or preoperative severity signs on imaging are present 8, 10

Predictors of SDH Expansion

• The International Journal of Stroke guidelines suggest that concurrent subarachnoid hemorrhage is a significant predictor of hematoma expansion and should heighten vigilance 8
• The Anaesthesia journal recommends that hypertension is a significant predictor of hematoma expansion and should be closely monitored 10

Anticoagulation Management in Small Subdural Hematoma

Immediate Discontinuation and Reversal

• In patients presenting with a small subdural hematoma who are receiving anticoagulant or antiplatelet therapy, all agents should be stopped promptly and pharmacologically reversed during the acute phase (typically for 1–2 weeks) to minimize hematoma expansion. This recommendation is supported by evidence from the Stroke journal (2006)【11】.

Timing for Resumption of Oral Anticoagulation

• Oral anticoagulants may be re‑initiated after approximately 3–4 weeks (or about 4 weeks following any required surgical evacuation), provided that careful monitoring is performed and the international normalized ratio (INR) is maintained toward the lower end of the therapeutic range. This guidance also derives from the Stroke (2006) study【11】.