An external ventricular drain is being inserted at Kocher's point. The entry site is located approximately 2 to 3 cm lateral to the midline and about 11 cm posterior to the nasion, which places it just anterior to which landmark?
- A Bregma
- B Lambda
- C Coronal suture ✓
- D Pterion
Correct answer: C. Coronal suture
Explanation
Kocher's point lies roughly 11 cm from the nasion along the midline and 2 to 3 cm to the side, placing it just anterior to the coronal suture and medial to the pupil line. C catheter passed here perpendicular to the skull enters the frontal horn of the lateral ventricle near the foramen of Monro. Bregma is the midline meeting of sutures itself, not a lateral entry reference.
Reference: Gray's Anatomy for Students, 4th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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