Fig. 1

Operative process of ultrasound images showing the target intracerebral hematoma. a: The parenchymal hematoma was formed by autologous blood injection (as shown by the white arrow), and the longest diameter is approximately 14.2 mm (as shown by the yellow dotted line 1). b: The parenchymal hematoma was identified (as shown by the white arrow and white dotted circle). The ultrasound probe was adjusted so that the center of the puncture guideline passed through the parenchymal hematoma. We know that the distance from the guide channel entrance to the center of hematoma (dot on the image center puncture guideline) is approximately 30 mm. c: Real-time tracking of the EICHD following the dotted puncture guideline as indicated by the white dotted arrow. The catheter passed through the burr hole in the skull under real-time ultrasound guidance, and the catheter position is indicated by the yellow arrow. d: The catheter reached the correct position in the hematoma. (The catheter is indicated by the white dotted arrow, and the final position is indicated by the yellow arrow). H: Hematoma, S: Skull as shown by the white dotted circle