Objectives: Perform radiological measurements and analysis of normal brain CT scans; delineate a new ventricular entry point from cutaneous landmarks, highlighting the potential surgical implications of these findings.
Methods: 6 radiological distances (AR; BR; AL; BL, C and D) were measured in normal brain CT scans using Horos software. Statistical analysis of the measurements was performed with minitab18 software based on age, sex and side.
Results: 132 brain CT scans were analyzed, yielding the following mean results: AR distance: 2.1cm; BR distance: 7 cm; AL distance: 2.1 cm; BL distance: 7.1 cm; C distance: 12.4 cm; D distance: 7 cm; new ventricular entry point: 12.4 cm posterior to the nasion and 2.1 cm lateral to the midline.
Conclusion: The freehand technique for accessing the lateral ventricles is a common neurosurgical procedure but is often accompanied by complications. To address this, we suggest a novel entry point for ventricular access, determined by cutaneous reference points. This point is situated 12.4 cm posterior to the nasion along the midline, and 2.1cm lateral to the midline. Although our findings may play a role in presurgical planning for ventricular pathologies, future prospective studies are warranted.
Keywords: landmarks; skin; statistical analysis; ventricles.
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