Methods Transcranial drainage and closed tee-junctions irrigation was carried out under local anesthesia in 31 cases of chronic subdural hematoma by using self-made trocar and osteotome.

• 方法局麻下自制套管针或骨锥等器械颅骨穿刺置管,联合三通密闭冲洗引流31例慢性硬膜下血肿。