Redefining Ventricular Access Landmarks: A Novel Approach Using Magnetic Resonance Imaging and 3-Dimensional Reconstructions for Keen's Point Trajectories.
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引用次数: 0
Abstract
Background: Cerebrospinal fluid diversion via shunt placement is a common neurosurgical intervention. Keen's Point is a widely used landmark for accessing the trigone of the lateral ventricle; however, it lacks clinical validation. This study re-evaluates Keen's Point scalp parameters using magnetic resonance imaging (MRI) to identify an ideal shunt entry point based on 3-dimensional reconstructions.
Methods: MRI data from 36 Parkinson disease patients scheduled for deep brain stimulation were analyzed. The optimal ventricular puncture site (A Point) was identified on axial MRI images and mapped to the scalp. Distances from A Point to a perpendicular line from the external auditory meatus (B Point) and from B Point to the pinna and external auditory meatus were measured. The Posterior Callosal Angle (PCA) was calculated to assess its correlation with the distance between A and B points. Statistical analysis used regression and t-tests (P < 0.05).
Results: After excluding patients with PCA outside 70°-100°, 24 patients remained. The optimal distance from B Point to A Point significantly increased from 25-30 mm (as described by Keen) to 56.89 ± 1.36 mm (P < 0.01). Average PCA angle (85°) correlates with a distance of ∼57 mm, and a significant negative correlation was found between PCA and the distance from A Point to B Point (r = -0.42, P < 0.03).
Conclusions: This modified Keen's Point is a reliable landmark for ventriculostomy. Incorporating PCA into preoperative planning enhances catheter placement accuracy, providing a prominent approach to shunting at Keen's Point.
期刊介绍:
World Neurosurgery has an open access mirror journal World Neurosurgery: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
The journal''s mission is to:
-To provide a first-class international forum and a 2-way conduit for dialogue that is relevant to neurosurgeons and providers who care for neurosurgery patients. The categories of the exchanged information include clinical and basic science, as well as global information that provide social, political, educational, economic, cultural or societal insights and knowledge that are of significance and relevance to worldwide neurosurgery patient care.
-To act as a primary intellectual catalyst for the stimulation of creativity, the creation of new knowledge, and the enhancement of quality neurosurgical care worldwide.
-To provide a forum for communication that enriches the lives of all neurosurgeons and their colleagues; and, in so doing, enriches the lives of their patients.
Topics to be addressed in World Neurosurgery include: EDUCATION, ECONOMICS, RESEARCH, POLITICS, HISTORY, CULTURE, CLINICAL SCIENCE, LABORATORY SCIENCE, TECHNOLOGY, OPERATIVE TECHNIQUES, CLINICAL IMAGES, VIDEOS