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Surg Neurol IntSurg Neurol IntSNISurgical Neurology International2229-50972152-7806Medknow Publications & Media Pvt Ltd India SNI-9-14110.4103/sni.sni_163_18General Neurosurgery: Video AbstractOne burr-hole craniotomy: Anterior interhemispheric approach in Helsinki Neurosurgery Choque-Velasquez Joham johchove@hotmail.com*Hernesniemi Juha juha.hernesniemi@icloud.com1Department of Neurosurgery, Helsinki University Hospital, Helsinki, Finland1 International Center for Neurosurgery, Henan Provincial People's Hospital, Zhengzhou, China* Corresponding Author
2018 24 7 2018 9 14125 5 2018 14 6 2018 Copyright: © 2018 Surgical Neurology International2018This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.Background:
In this video-abstract, we present a one burr-hole craniotomy for the anterior interhemispheric approach developed in Helsinki Neurosurgery to access the medial surface of cerebral hemispheres, the falx cerebri, the distal segment of the anterior cerebral artery, the corpus callosum, the third ventricle, and the lateral ventricles. Therefore, preoperative imaging is essential to achieve an optimal operative corridor for safest and more effcient approach.

Case Description:
The patient with a no ruptured right pericallosal aneurysm is placed in semi-sitting position. A midline single-layer curved skin incision is made behind the hairline with more extension to the side of the planned bone flap. Strong retraction with hooks keeps a clean space for craniotomy. Hemostatic Raney clips are placed at the posterior border of the wound. A burr-hole is made over the superior sagittal sinus at the posterior border of the bone flap. The bone is detached from the dura anteriorly with blunt dissectors. Thus, we avoid harming the superior cerebral veins distributed at the posterior frontal area. After the detachment of the dura, a craniotomy around the superior sagittal sinus is performed to expose 2–3 cm of the dura lateral to the sagittal sinus. Moreover, the craniotomy extends slightly over the contralateral side to allow some retraction of the sagittal sinus. Two cuts, from both sites of the burr-hole, are joined along the anterior midline by thinning the bone with craniotome blade without the footplate. A few drill holes are made for tack-up sutures. The bone is cracked along the thinned midline. Finally, a hemostatic agent covers the sagittal sinus and a sinus-based dura opening is performed under the microscope.

Conclusion:
The described one burr-hole craniotomy may represent a more efficient manner for performing an anterior interhemispheric approach.

Videolink:
http://surgicalneurologyint.com/videogallery/anterior-interhemispheric-approach/

Anterior interhemispheric approachburr-holecraniotomy
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http://surgicalneurologyint.com/One-burr-hole-craniotomy:-Anterior-interhemispheric-approach-in-Helsinki-Neurosurgery/