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Check the CT scan of the patient's brain, find out the largest hematoma level of the patient, measure the coordinates of the puncture center, locate and mark the skull surface according to the coordinates obtained from the measurement, select the puncture point under the stereotaxic instrument, and mainly avoid important blood vessels , nerves and functional areas. Use an electric drill to drill the puncture needle into the center of the hematoma, and slowly aspirate the hematoma from the side hole until the suction stops when there is resistance. The residual hematoma in CT and the location of the drainage tube were determined, and the position of the puncture needle was adjusted for the situation of brain CT. After the operation, according to the re-examination of cranial CT, urokinase was injected into the hematoma cavity through the drainage tube to dissolve the residual hematoma, and the operation process strictly followed aseptic operation.

Prior to the procedure, all patients obtained endotracheal intubation under general anesthesia following the informed consent provided by their family members. Upon identifying the hematoma's location through CT imaging, the surgeon made a linear or horseshoe-shaped incision on the scalp and subsequently opened the dura mater after creating a bone flap. The hematoma was punctured using a brain needle, allowing for effective decompression. The cerebral cortex was incised along the cerebral gyri, facilitating the separation of brain tissue to eliminate residual hematoma. Once hemostasis was ensured within the operative area, a silicone drainage tube was inserted, and the cranial bone flap was restored to its original position. In cases of severe brain edema or cerebral herniation, bone flap decompression was performed.

The patient's preoperative CT and MR imaging data were fused with a neuronavigation system to avoid important functional areas and select the closest point of the hematoma to the cortex as the location point. Routine craniotomy was performed with a 2\*3 cm bone window, the puncture direction was repositioned by neuronavigation, the sheath was placed at the center of the hematoma, the core was removed, the endoscope was gradually aspirated, and the bleeding was stopped with electrocoagulation if there was considerable active bleeding. A drainage tube was placed, the bone flap was reset after surgery, and the scalp was sutured.