Terminated due to lack of the flexible endoscope.

The purpose of this study is to evaluate a less-invasive alternative to the currently available method of removing aging blood in the subdural space.

Inclusion Criteria:

• Must be 55 years of age or greater.
• Have a clinically symptomatic chronic subdural hematoma greater than 1 cm in maximal thickness and be judged clinically to need subdural evacuation.

Exclusion Criteria:

• Failure to obtain consent.
• Vulnerable study population.
• Any need for chronic anticoagulation.
• Pregnancy (verified by pregnancy testing at screening or medical history of a hysterectomy, oophorectomy, or post-menopausal).Prior surgery for subdural hematoma.
• Glasgow Coma Scale (GCS) less than 8.